/* ==========================================================================
   快连vpn - Premium Technology SaaS Stylesheet
   Theme: Pastel Orange & Pastel Red/Pink Glow
   Mobile First | Light Glassmorphism | Bento Grid | Soft Warm Glow
   ========================================================================== */

:root {
  /* Color Palette - Pastel Orange & Pastel Red/Pink */
  --bg-main: #0e0a12;
  --bg-card: rgba(28, 20, 32, 0.75);
  --bg-card-hover: rgba(38, 27, 44, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-header: rgba(14, 10, 18, 0.88);
  
  --border-color: rgba(255, 255, 255, 0.09);
  --border-glow: rgba(255, 159, 102, 0.4);

  --text-primary: #fcfcfd;
  --text-secondary: #d4c5d9;
  --text-muted: #9e8d9f;

  /* Pastel Highlights */
  --accent-orange: #ff9f66;
  --accent-pink: #ff6b8b;
  --accent-coral: #ff8e72;
  --accent-pastel-yellow: #ffd166;
  --accent-green: #10b981;
  
  --gradient-primary: linear-gradient(135deg, #ff9f66 0%, #ff6b8b 100%);
  --gradient-secondary: linear-gradient(135deg, #ff8e72 0%, #ff5277 100%);
  --gradient-glow: radial-gradient(circle, rgba(255, 159, 102, 0.22) 0%, rgba(255, 107, 139, 0.08) 50%, transparent 100%);
  --gradient-text: linear-gradient(135deg, #ffffff 20%, #ffe3d1 60%, #ffb3c1 100%);

  /* Layout & Geometry */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 8px 32px rgba(255, 107, 139, 0.2);

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(at 15% 15%, rgba(255, 159, 102, 0.13) 0px, transparent 40%),
    radial-gradient(at 85% 65%, rgba(255, 107, 139, 0.11) 0px, transparent 40%);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Utility Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 5rem 0;
  position: relative;
}

@media (max-width: 768px) {
  .section {
    padding: 3.5rem 0;
  }
}

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-orange);
  background: rgba(255, 159, 102, 0.12);
  border: 1px solid rgba(255, 159, 102, 0.3);
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 1rem;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.75rem;
  }
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* Buttons & CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  white-space: nowrap;
  border: none;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(255, 107, 139, 0.38);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(255, 159, 102, 0.55);
  opacity: 0.95;
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 159, 102, 0.35);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

/* Header Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-header);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 14px rgba(255, 159, 102, 0.45);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-links a:hover {
  color: var(--accent-orange);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

@media (max-width: 1024px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: #150f1b;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    z-index: 999;
  }

  .nav-links.active {
    transform: translateY(0);
  }

  .hamburger {
    display: block;
  }
}

/* Hero Section */
.hero {
  padding-top: 8.5rem;
  padding-bottom: 5rem;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

.hero-content h1 {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}

@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 2.25rem;
  }
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-badges {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-orange);
  box-shadow: 0 0 8px var(--accent-orange);
}

/* Hero Dashboard (CSS Tech Dashboard) */
.dashboard-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-glow);
  position: relative;
  backdrop-filter: blur(12px);
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.dashboard-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-orange);
  background: rgba(255, 159, 102, 0.12);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.nodes-status-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.node-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: border-color var(--transition-fast);
}

.node-item:hover {
  border-color: var(--border-glow);
}

.node-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.node-flag {
  font-size: 1.1rem;
}

.node-name {
  font-size: 0.875rem;
  font-weight: 600;
}

.node-ping {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--accent-orange);
}

.waveform-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  height: 110px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  gap: 4px;
}

.wave-bar {
  flex: 1;
  background: var(--gradient-primary);
  border-radius: 2px;
  animation: pulseBar 2s ease-in-out infinite alternate;
}

@keyframes pulseBar {
  0% { height: 20%; opacity: 0.4; }
  100% { height: 95%; opacity: 1; }
}

.wave-bar:nth-child(2n) { animation-delay: 0.2s; }
.wave-bar:nth-child(3n) { animation-delay: 0.4s; }
.wave-bar:nth-child(4n) { animation-delay: 0.6s; }
.wave-bar:nth-child(5n) { animation-delay: 0.8s; }

/* Bento Grid Features */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 992px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.bento-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(255, 159, 102, 0.12);
  border: 1px solid rgba(255, 159, 102, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-orange);
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
}

.bento-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.bento-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* AI & Streaming Section */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .scene-grid {
    grid-template-columns: 1fr;
  }
}

.scene-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.scene-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.scene-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.25rem;
}

.scene-tag-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  align-items: center;
}

@media (max-width: 992px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(46, 26, 36, 0.9) 0%, rgba(20, 14, 24, 0.95) 100%);
  border: 2px solid var(--accent-pink);
  box-shadow: 0 0 38px rgba(255, 107, 139, 0.3);
  transform: scale(1.04);
}

@media (max-width: 992px) {
  .pricing-card.featured {
    transform: scale(1);
  }
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 1rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.25rem;
}

.pricing-price span {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin: 1.75rem 0;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
}

.pricing-features li {
  font-size: 0.925rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.pricing-features li svg {
  color: var(--accent-orange);
  flex-shrink: 0;
}

/* Blog Articles Grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 992px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.blog-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.blog-category {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-coral);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.blog-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.blog-card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.blog-meta {
  font-size: 0.785rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 992px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
}

.user-details h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

.user-details p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.testimonial-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* FAQ Accordion */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 1.5rem 1.25rem 1.5rem;
}

.faq-icon {
  transition: transform 0.3s ease;
  color: var(--accent-orange);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

/* Footer */
.footer {
  background: #08050b;
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.footer-brand p {
  margin-top: 1rem;
  color: var(--text-muted);
  max-width: 320px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-col ul a {
  color: var(--text-secondary);
}

.footer-col ul a:hover {
  color: var(--accent-orange);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.footer-links-row {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
  font-size: 0.85rem;
}

.footer-links-row a {
  color: var(--accent-orange);
}

.footer-links-row a:hover {
  text-decoration: underline;
}

/* Article & Page Templates */
.page-article {
  padding-top: 7.5rem;
  padding-bottom: 5rem;
}

.article-container {
  max-width: 820px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.article-header {
  margin-bottom: 2.5rem;
}

.article-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.25;
  color: #ffffff;
  margin-bottom: 1rem;
}

@media (max-width: 768px) {
  .article-title {
    font-size: 1.85rem;
  }
}

.article-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #d8cbdc;
}

.article-content h2 {
  font-size: 1.65rem;
  color: #ffffff;
  margin: 2.25rem 0 1rem 0;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.article-content h3 {
  font-size: 1.3rem;
  color: #ffffff;
  margin: 1.75rem 0 0.75rem 0;
}

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 4px solid var(--accent-pink);
  background: rgba(255, 107, 139, 0.08);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
  font-style: italic;
  color: #f3e8f4;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.925rem;
}

.article-content th, .article-content td {
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  text-align: left;
}

.article-content th {
  background: rgba(255, 159, 102, 0.1);
  color: #ffffff;
}

.cta-box {
  background: linear-gradient(135deg, rgba(255, 159, 102, 0.15) 0%, rgba(255, 107, 139, 0.15) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  text-align: center;
  margin: 3rem 0;
}

.cta-box h3 {
  font-size: 1.5rem;
  color: #ffffff;
  margin-bottom: 0.75rem;
}

.cta-box p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Reduced Motion Accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}