/* ============================================================
   加拿大PC预测网 - SaaS Landing Page
   Custom Styles
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --secondary: #2563eb;
  --accent: #6366f1;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --bg-light: #f8fafc;
  --white: #ffffff;
  --radius: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.06);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-main);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ---------- Glass Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
  padding: 10px 0;
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}
.nav-logo i { font-size: 1.6rem; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: width 0.25s ease;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition);
}
.nav-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(79,70,229,0.35);
}
.nav-cta::after { display: none !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}
.hamburger span {
  display: block;
  width: 26px; height: 2.5px;
  background: var(--text-main);
  border-radius: 4px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu a {
  text-decoration: none;
  color: var(--text-main);
  font-size: 1.3rem;
  font-weight: 600;
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--primary); }
.mobile-menu .mobile-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 12px 36px;
  border-radius: 50px;
  margin-top: 12px;
}

/* ---------- Hero ---------- */
.hero {
  padding: 140px 0 80px;
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(99,102,241,0.10) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -120px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(37,99,235,0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero .container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99,102,241,0.08);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 20px;
  color: var(--text-main);
  letter-spacing: -0.02em;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 1.12rem;
  color: var(--text-muted);
  margin: 0 0 32px;
  max-width: 480px;
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(79,70,229,0.3);
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79,70,229,0.4);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  color: var(--primary);
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: rgba(99,102,241,0.04);
  transform: translateY(-2px);
}
.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-image img {
  max-width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-xl);
  transition: transform 0.6s ease;
}
.hero-image img:hover {
  transform: scale(1.02);
}
.hero-float-card {
  position: absolute;
  background: var(--white);
  border-radius: 12px;
  padding: 14px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: floatUpDown 3s ease-in-out infinite;
}
.hero-float-card.card-1 {
  bottom: 70px; left: -30px;
  animation-delay: 0s;
}
.hero-float-card.card-2 {
  top: 60px; right: -20px;
  animation-delay: 1.5s;
}
@keyframes floatUpDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- Section Common ---------- */
.section {
  padding: 90px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-label {
  display: inline-block;
  background: rgba(99,102,241,0.08);
  color: var(--primary);
  padding: 5px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-main);
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Features ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transition: transform 0.4s ease;
}
.feature-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 64px; height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(37,99,235,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.6rem;
  color: var(--primary);
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 8px 24px rgba(79,70,229,0.3);
}
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--text-main);
}
.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.65;
}

/* ---------- Stats ---------- */
.stats-section {
  background: var(--bg-light);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.stat-item {
  padding: 40px 20px;
  text-align: center;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  width: 1px; height: 50px;
  background: rgba(0,0,0,0.06);
}
.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stat-label {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-weight: 500;
}

/* ---------- Testimonials ---------- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.testimonial-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  transition: var(--transition);
}
.testimonial-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.testimonial-stars {
  color: #f59e0b;
  font-size: 0.95rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.7;
  margin: 0 0 20px;
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.testimonial-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.testimonial-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}
.testimonial-role {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------- FAQ Accordion ---------- */
.faq-container {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.04);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-md); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  gap: 16px;
  transition: color 0.2s;
}
.faq-question:hover { color: var(--primary); }
.faq-question i {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: transform 0.35s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.36s ease;
}
.faq-item.active .faq-answer {
  max-height: 300px;
}
.faq-answer p {
  margin: 0;
  padding: 0 24px 20px;
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ---------- CTA ---------- */
.cta-section {
  background: linear-gradient(135deg, #3730a3, #4f46e5, #2563eb);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 350px; height: 350px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -60px;
  width: 250px; height: 250px;
  background: rgba(255,255,255,0.04);
  border-radius: 50%;
}
.cta-section .container {
  text-align: center;
  position: relative;
  z-index: 1;
}
.cta-section h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.cta-section p {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.8);
  margin: 0 0 36px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}
.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}
.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--primary);
  padding: 14px 34px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.25);
}
.btn-outline-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: #fff;
  padding: 14px 34px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid rgba(255,255,255,0.5);
  transition: var(--transition);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  transform: translateY(-2px);
}

/* ---------- Footer ---------- */
.footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p {
  font-size: 0.92rem;
  line-height: 1.7;
  margin: 14px 0 0;
  color: #94a3b8;
}
.footer-column h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #e2e8f0;
  margin: 0 0 18px;
}
.footer-column ul {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-column a {
  text-decoration: none;
  color: #94a3b8;
  font-size: 0.9rem;
  transition: color 0.2s;
}
.footer-column a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copyright {
  font-size: 0.85rem;
  color: #64748b;
}
.footer-social {
  display: flex;
  gap: 16px;
}
.footer-social a {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  font-size: 0.95rem;
  text-decoration: none;
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ---------- Reveal Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero-image { order: -1; }
  .hero h1 { font-size: 2.2rem; }
  .hero-float-card { display: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: flex; }
  .hero { padding: 120px 0 60px; }
  .hero h1 { font-size: 1.9rem; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.7rem; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2)::after { display: none; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .cta-section h2 { font-size: 1.7rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.6rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item::after { display: none !important; }
  .btn-primary, .btn-outline, .btn-white, .btn-outline-white { width: 100%; justify-content: center; }
  .hero-buttons, .cta-buttons { flex-direction: column; }
}