/* ==========================================================================
   大象网络 (Daxiang Cloud) - 现代 SaaS 科技风格主样式表
   Palette & Theme:
     - 深色背景: #0a0e1a
     - 极光光球: 紫 #7c6cff, 青 #22d3ee, 粉 #f472b6
     - 磨砂玻璃 (Glassmorphism): backdrop-filter: blur(14px), border: 1px solid rgba(255,255,255,0.12)
     - 字体: 标题 Space Grotesk, 正文 Inter
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  --bg-dark: #0a0e1a;
  --bg-card: rgba(18, 24, 43, 0.65);
  --bg-card-hover: rgba(26, 35, 64, 0.75);
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-glass-bright: rgba(255, 255, 255, 0.25);
  --aurora-purple: #7c6cff;
  --aurora-cyan: #22d3ee;
  --aurora-pink: #f472b6;
  --text-white: #ffffff;
  --text-slate: #94a3b8;
  --text-dim: #64748b;
  --font-heading: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max-width: 1200px;
  --transition-fast: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-dark);
  color: var(--text-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
}

body {
  min-height: 100vh;
  position: relative;
  background-color: var(--bg-dark);
  overflow-x: hidden;
}

/* Floating Aurora Glowing Orbs */
.aurora-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.aurora-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.42;
  transition: transform 0.25s ease-out;
  animation: floatOrb 22s infinite alternate ease-in-out;
}

.orb-purple {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--aurora-purple) 0%, transparent 70%);
  top: -150px;
  left: 10%;
  animation-duration: 20s;
}

.orb-cyan {
  width: 650px;
  height: 650px;
  background: radial-gradient(circle, var(--aurora-cyan) 0%, transparent 70%);
  top: 35%;
  right: -100px;
  animation-duration: 26s;
  animation-delay: -5s;
}

.orb-pink {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, var(--aurora-pink) 0%, transparent 70%);
  bottom: -150px;
  left: 20%;
  animation-duration: 24s;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 80px) scale(1.12); }
  100% { transform: translate(-50px, 40px) scale(0.92); }
}

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Typography Helpers */
.font-heading {
  font-family: var(--font-heading);
}

.gradient-title {
  background: linear-gradient(135deg, #ffffff 20%, var(--aurora-cyan) 60%, var(--aurora-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cyan-gradient-text {
  background: linear-gradient(135deg, var(--aurora-cyan) 0%, var(--aurora-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Fixed Glassmorphism Navbar */
.glass-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(10, 14, 26, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  z-index: 1000;
  transition: var(--transition-fast);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.nav-brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-white);
}

.brand-icon-box {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--aurora-purple), var(--aurora-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(124, 108, 255, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-item-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-slate);
  text-decoration: none;
  transition: var(--transition-fast);
  position: relative;
  padding: 8px 0;
}

.nav-item-link:hover {
  color: var(--text-white);
}

.nav-item-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--aurora-cyan), var(--aurora-purple));
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-item-link:hover::after {
  width: 100%;
}

.nav-btn-saas {
  padding: 9px 24px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #fff;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--aurora-purple), #5b47fb);
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-decoration: none;
  box-shadow: 0 0 20px rgba(124, 108, 255, 0.35);
  transition: var(--transition-fast);
}

.nav-btn-saas:hover {
  box-shadow: 0 0 30px rgba(124, 108, 255, 0.6);
  transform: translateY(-2px);
}

/* Hero Section */
.saas-hero {
  padding-top: 160px;
  padding-bottom: 110px;
  text-align: center;
  position: relative;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.3);
  border-radius: 30px;
  font-size: 0.85rem;
  color: var(--aurora-cyan);
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}

.saas-hero-title {
  font-family: var(--font-heading);
  font-size: 3.6rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.5px;
  max-width: 980px;
  margin: 0 auto 24px;
}

.saas-hero-desc {
  font-size: 1.18rem;
  line-height: 1.8;
  color: var(--text-slate);
  max-width: 760px;
  margin: 0 auto 42px;
}

.saas-hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* Glowing SaaS CTA Button */
.btn-saas-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 38px;
  font-size: 1.02rem;
  font-weight: 600;
  color: #fff;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--aurora-purple) 0%, #4f46e5 100%);
  border: 1px solid rgba(255, 255, 255, 0.25);
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 25px rgba(124, 108, 255, 0.45), inset 0 1px 1px rgba(255, 255, 255, 0.3);
  transition: var(--transition-fast);
}

.btn-saas-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(124, 108, 255, 0.7);
}

/* Hero Network Audit Button (dofollow) */
.btn-saas-audit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-white);
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  text-decoration: none;
  transition: var(--transition-fast);
}

.btn-saas-audit:hover {
  background: var(--bg-card-hover);
  border-color: var(--aurora-cyan);
  color: var(--aurora-cyan);
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.25);
  transform: translateY(-2px);
}

.hero-features-strip {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  color: var(--text-slate);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.strip-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 4 Frosted Glass Feature Cards with 3D Tilt */
.features-saas-section {
  padding: 100px 0;
  position: relative;
}

.section-head-center {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 70px;
}

.badge-tag {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--aurora-cyan);
  margin-bottom: 12px;
  display: inline-block;
}

.section-head-center h2 {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  line-height: 1.3;
  margin-bottom: 18px;
}

.cards-4-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.tilt-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 36px 28px;
  position: relative;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, border-color 0.2s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

.tilt-card:hover {
  border-color: var(--border-glass-bright);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5), 0 0 25px rgba(124, 108, 255, 0.15);
}

.tilt-card-icon {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 1.5rem;
}

.icon-purple {
  background: rgba(124, 108, 255, 0.15);
  border: 1px solid rgba(124, 108, 255, 0.35);
  color: var(--aurora-purple);
}

.icon-cyan {
  background: rgba(34, 211, 238, 0.15);
  border: 1px solid rgba(34, 211, 238, 0.35);
  color: var(--aurora-cyan);
}

.icon-pink {
  background: rgba(244, 114, 182, 0.15);
  border: 1px solid rgba(244, 114, 182, 0.35);
  color: var(--aurora-pink);
}

.icon-blue {
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #60a5fa;
}

.tilt-card h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  margin-bottom: 12px;
  color: var(--text-white);
}

.tilt-card p {
  color: var(--text-slate);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* Streaming & AI Cards */
.saas-media-ai {
  padding: 80px 0 110px;
}

.media-ai-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.glass-box-panel {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 40px;
  position: relative;
  transition: var(--transition-fast);
}

.glass-box-panel:hover {
  border-color: rgba(34, 211, 238, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.glass-box-panel h3 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.glass-box-panel p {
  color: var(--text-slate);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 24px;
}

.badge-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge-tag-pill {
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  font-size: 0.84rem;
  color: #e2e8f0;
}

/* Three-tier Pricing Table with Middle Tier Highlighted */
.pricing-saas-section {
  padding: 100px 0;
}

.pricing-saas-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: center;
  margin-top: 60px;
}

.saas-price-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 18px;
  padding: 42px 36px;
  position: relative;
  transition: var(--transition-fast);
}

.saas-price-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* Middle Tier Highlighted with Aurora Glow */
.saas-price-card.tier-highlight {
  background: linear-gradient(180deg, rgba(30, 39, 72, 0.85) 0%, rgba(18, 24, 45, 0.85) 100%);
  border: 1.5px solid var(--aurora-cyan);
  box-shadow: 0 0 35px rgba(34, 211, 238, 0.25);
  transform: scale(1.04);
}

.saas-price-card.tier-highlight:hover {
  transform: scale(1.04) translateY(-6px);
  box-shadow: 0 0 50px rgba(34, 211, 238, 0.4);
}

.tier-floating-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--aurora-cyan), var(--aurora-purple));
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1.2px;
  padding: 4px 18px;
  border-radius: 20px;
  box-shadow: 0 0 15px rgba(34, 211, 238, 0.5);
}

.tier-name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.tier-desc {
  font-size: 0.88rem;
  color: var(--text-slate);
  margin-bottom: 28px;
  min-height: 44px;
}

.tier-price-row {
  margin-bottom: 30px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-glass);
}

.price-unit {
  font-size: 1.3rem;
  color: var(--aurora-cyan);
  font-weight: 600;
}

.price-num {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
}

.price-sub {
  font-size: 0.88rem;
  color: var(--text-slate);
}

.tier-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
}

.tier-features li {
  font-size: 0.92rem;
  color: #e2e8f0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tier-features li svg {
  color: var(--aurora-cyan);
  flex-shrink: 0;
}

.btn-tier-cta {
  width: 100%;
  display: block;
  text-align: center;
  padding: 14px 0;
  font-size: 0.96rem;
  font-weight: 600;
  border-radius: 10px;
  text-decoration: none;
  transition: var(--transition-fast);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  color: #fff;
}

.btn-tier-cta:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.3);
}

.saas-price-card.tier-highlight .btn-tier-cta {
  background: linear-gradient(135deg, var(--aurora-cyan), var(--aurora-purple));
  border: none;
  box-shadow: 0 4px 20px rgba(34, 211, 238, 0.4);
}

.saas-price-card.tier-highlight .btn-tier-cta:hover {
  box-shadow: 0 6px 30px rgba(34, 211, 238, 0.65);
}

/* Testimonials SaaS */
.saas-reviews {
  padding: 90px 0;
}

.reviews-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 50px;
}

.review-card-glass {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars {
  color: #fbbf24;
  margin-bottom: 14px;
  font-size: 0.95rem;
}

.review-text {
  color: var(--text-slate);
  font-size: 0.94rem;
  line-height: 1.75;
  margin-bottom: 24px;
}

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

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--aurora-cyan), var(--aurora-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
}

/* FAQ SaaS */
.faq-saas-wrap {
  padding: 100px 0;
}

.faq-accordion-box {
  max-width: 860px;
  margin: 50px auto 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.saas-faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-fast);
}

.saas-faq-item:hover {
  border-color: rgba(34, 211, 238, 0.35);
}

.saas-faq-q {
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 600;
}

.saas-faq-q span.icon {
  font-size: 1.4rem;
  color: var(--aurora-cyan);
  transition: transform 0.3s ease;
}

.saas-faq-item.open span.icon {
  transform: rotate(45deg);
}

.saas-faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 28px;
  color: var(--text-slate);
  font-size: 0.94rem;
  line-height: 1.8;
}

.saas-faq-item.open .saas-faq-a {
  max-height: 380px;
  padding: 0 28px 24px;
}

/* Footer: STRICTLY ONLY 4 Titles opening in new tab */
.saas-footer {
  background: rgba(6, 9, 18, 0.92);
  border-top: 1px solid var(--border-glass);
  padding: 60px 0 35px;
  text-align: center;
  position: relative;
  z-index: 10;
}

.footer-nav-exact {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  list-style: none;
  margin-bottom: 28px;
}

.footer-exact-link {
  font-size: 0.95rem;
  color: var(--text-slate);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-exact-link:hover {
  color: var(--aurora-cyan);
}

.footer-copy {
  font-size: 0.84rem;
  color: var(--text-dim);
}

/* Responsive */
@media (max-width: 1024px) {
  .saas-hero-title { font-size: 2.8rem; }
  .cards-4-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-saas-grid { grid-template-columns: 1fr; max-width: 520px; margin: 50px auto 0; }
  .saas-price-card.tier-highlight { transform: none; }
  .saas-price-card.tier-highlight:hover { transform: translateY(-6px); }
  .reviews-grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .saas-hero-title { font-size: 2.1rem; }
  .cards-4-grid { grid-template-columns: 1fr; }
  .media-ai-2col { grid-template-columns: 1fr; }
  .saas-hero-actions { flex-direction: column; }
  .btn-saas-primary, .btn-saas-audit { width: 100%; text-align: center; }
  .footer-nav-exact { flex-direction: column; gap: 16px; }
}