/* ===================================================================
   Candytally (糖果云) - Flavor Lab Design System
   Pure CSS3 Custom Properties & Responsive Styling
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Default Flavor Theme: Strawberry 🍓 */
  --bg: #FFF5F8;
  --primary: #FF4D8D;
  --primary2: #FF75A0;
  --soft: #FFE4EE;
  --ink: #2D1522;
  --glow: rgba(255, 77, 141, 0.35);

  /* Shared Neutrals */
  --white: #FFFFFF;
  --card-bg: #FFFFFF;
  --card-border: rgba(0, 0, 0, 0.06);
  --text-muted: #6B7280;
  --text-heading: #1F2937;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.08);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --max-w: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  min-height: 100vh;
  position: relative;
}

/* Subtle Background Gradient Overlay */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 600px;
  background: radial-gradient(circle at 50% -10%, var(--soft) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
  transition: background var(--transition-normal);
}

/* Candy Cursor Trail */
.cursor-dot {
  position: fixed;
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 99999;
  transform: translate(-50%, -50%);
  animation: candyFade 0.65s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  box-shadow: 0 0 8px var(--glow);
}

@keyframes candyFade {
  0% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.15) translateY(12px);
  }
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* Top Bar & Flavor Lab Switcher */
.flavor-bar-wrapper {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-normal);
}

.flavor-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ink);
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 32px;
  height: 32px;
  fill: var(--primary);
  transition: fill var(--transition-normal), transform var(--transition-fast);
}

.brand-logo:hover .brand-icon {
  transform: rotate(15deg) scale(1.1);
}

.brand-text span {
  color: var(--primary);
  transition: color var(--transition-normal);
}

.flavor-chips {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.03);
  padding: 4px;
  border-radius: var(--radius-full);
}

.flavor-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background: transparent;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
}

.flavor-chip:hover {
  background: rgba(255, 255, 255, 0.8);
  transform: translateY(-1px);
}

.flavor-chip.active {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 12px var(--glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav-links a.news-badge-link {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--soft);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.nav-links a.news-badge-link:hover {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 2px 8px var(--glow);
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
  font-size: 0.88rem;
  text-decoration: none;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px var(--glow);
  transition: all var(--transition-fast);
}

.nav-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px var(--glow);
}

/* Hero Section */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border: 1.5px dashed var(--primary);
  border-radius: var(--radius-full);
  background: var(--soft);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 24px;
  transition: all var(--transition-normal);
}

.status-pill .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 var(--glow); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(0, 0, 0, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 0, 0, 0); }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
  color: var(--ink);
}

.gradient-headline {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline;
  transition: all var(--transition-normal);
}

.hero-subhead {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--ink);
  opacity: 0.9;
  max-width: 820px;
  margin: 0 auto 16px;
}

.hero-intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary2) 100%);
  color: var(--white);
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 28px var(--glow);
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 36px var(--glow);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  background: var(--white);
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-full);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.btn-ghost:hover {
  background: var(--soft);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* Trust Badges Bar */
.hero-trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  padding: 16px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  max-width: 880px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.hero-trust-bar span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

/* Core Feature Cards (3 White Cards) */
.section {
  padding: 70px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px;
}

.section-kicker {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary);
  margin-bottom: 10px;
  transition: color var(--transition-normal);
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--ink);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

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

.feature-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 32px var(--glow), var(--shadow-md);
  border-color: var(--primary);
}

.card-icon-tile {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 24px;
  transition: background var(--transition-normal), color var(--transition-normal);
}

.card-icon-tile svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

.feature-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.feature-list {
  list-style: none;
  font-size: 0.9rem;
  color: var(--ink);
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.feature-list li span.check {
  color: var(--primary);
  font-weight: bold;
}

/* Streaming & AI Cards */
.streaming-ai-section {
  background: linear-gradient(180deg, transparent 0%, rgba(255, 255, 255, 0.6) 100%);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition-fast);
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 8px 24px var(--glow);
}

.service-logo-box {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--soft);
  color: var(--primary);
  flex-shrink: 0;
}

.service-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 2px;
}

.service-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
}

.service-badge {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(18, 184, 134, 0.12);
  color: #12B886;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  margin-top: 4px;
}

/* Pricing Table */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 26px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 36px var(--glow), var(--shadow-md);
}

.pricing-card.popular {
  border: 2px solid var(--primary);
  box-shadow: 0 12px 32px var(--glow);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.popular:hover {
  transform: scale(1.05) translateY(-8px);
}

.popular-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: var(--white);
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px var(--glow);
}

.pricing-plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 6px;
}

.pricing-plan-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.pricing-cost {
  margin-bottom: 24px;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  vertical-align: top;
}

.price-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--ink);
  line-height: 1;
}

.price-cycle {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.88rem;
  color: var(--ink);
  padding: 8px 0;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-features li.disabled {
  color: #9CA3AF;
  text-decoration: line-through;
}

.pricing-card .btn-card-cta {
  width: 100%;
  padding: 13px 20px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition: all var(--transition-fast);
  background: var(--soft);
  color: var(--primary);
  border: 1px solid transparent;
}

.pricing-card.popular .btn-card-cta,
.pricing-card .btn-card-cta:hover {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 6px 18px var(--glow);
}

/* User Reviews / Testimonials */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 8px 24px var(--glow);
}

.review-stars {
  color: #F59F00;
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--ink);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

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

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--soft);
  color: var(--primary);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.reviewer-info h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
}

.reviewer-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--primary);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.faq-icon {
  font-size: 1.3rem;
  color: var(--primary);
  transition: transform var(--transition-fast);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.faq-item.open .faq-answer {
  max-height: 250px;
  padding: 0 24px 20px;
}

/* Bottom CTA Banner */
.bottom-cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary2) 100%);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  color: var(--white);
  box-shadow: 0 20px 40px var(--glow);
  margin: 40px auto 60px;
}

.bottom-cta-banner h2 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--white);
}

.bottom-cta-banner p {
  font-size: 1.1rem;
  opacity: 0.95;
  max-width: 650px;
  margin: 0 auto 30px;
}

.bottom-cta-banner .btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  color: var(--primary);
  padding: 16px 36px;
  border-radius: var(--radius-full);
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  transition: all var(--transition-fast);
}

.bottom-cta-banner .btn-white:hover {
  transform: translateY(-3px) scale(1.02);
  background: var(--soft);
}

/* Footer (Strict 4 Links As Specified) */
.site-footer {
  background: var(--white);
  border-top: 1px solid var(--card-border);
  padding: 40px 0 30px;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  text-align: center;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 600;
  transition: color var(--transition-fast);
  padding: 4px 8px;
}

.footer-nav a:hover {
  color: var(--primary);
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===================================================================
   Responsive Mobile Media Queries
   =================================================================== */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .flavor-bar {
    flex-wrap: wrap;
    justify-content: space-between;
  }
  
  .flavor-chips {
    order: 3;
    width: 100%;
    justify-content: center;
    overflow-x: auto;
    padding: 6px 4px;
  }

  .nav-links {
    display: none;
  }

  .hero-title {
    font-size: 2.3rem;
    letter-spacing: -1px;
  }

  .hero-subhead {
    font-size: 1.1rem;
  }

  .features-grid,
  .reviews-grid,
  .pricing-grid,
  .service-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.popular {
    transform: none;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary, .btn-ghost {
    width: 100%;
  }

  .hero-trust-bar {
    flex-direction: column;
    gap: 12px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
}