/* static/css/new-style.css */

:root {
  /* 主要配色 */
  --primary-color: #4361ee;
  --primary-dark: #3a56d4;
  --secondary-color: #7209b7;
  --accent-color: #06d6a0;

  /* 中性色 */
  --dark: #2b2d42;
  --light: #f8f9fa;
  --gray: #6c757d;
  --light-gray: #e9ecef;
  --white: #ffffff;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  --gradient-accent: linear-gradient(135deg, var(--accent-color), #08a080);

  /* 阴影 */
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.15);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 50px;

  /* 动画 */
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-fast: all 0.2s ease;

  /* 字体大小 */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3rem;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background-color: var(--white);
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

header.scrolled {
  padding: 0.5rem 0;
  box-shadow: var(--shadow-md);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 0;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--dark);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-sm);
  position: relative;
  padding: 0.5rem 0;
  transition: var(--transition);
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition);
  border-radius: var(--radius-full);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  background: linear-gradient(rgba(43, 45, 66, 0.85), rgba(43, 45, 66, 0.9)),
              url("https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1770&q=80");
  background-size: cover;
  background-position: center;
  height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 80px;
}

.hero-content {
  max-width: 700px;
  color: var(--white);
}

.hero-content h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.hero-content p {
  font-size: var(--font-size-lg);
  margin-bottom: 2rem;
  opacity: 0.9;
}

.hero-highlight {
  background: var(--gradient-accent);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 2rem;
  font-weight: 600;
  font-size: var(--font-size-md);
}

.hero-features {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--gradient-primary);
  color: white;
  padding: 1rem 2rem;
  text-decoration: none;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-md);
  transition: var(--transition);
  box-shadow: var(--shadow-md);
  border: none;
  cursor: pointer;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
  background: transparent;
  border: 2px solid white;
}

/* Features Section */
.features {
  padding: 6rem 0;
  background: var(--white);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-header h2 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 1rem;
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--gray);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

.feature-card {
  background: var(--light);
  padding: 2.5rem 2rem;
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--light-gray);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: var(--transition);
  flex-shrink: 0;
}

.feature-card:hover .feature-icon {
  transform: scale(1.1);
}

.feature-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--dark);
}

.feature-card p {
  color: var(--gray);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.feature-list {
  text-align: left;
  list-style: none;
  padding: 0;
  margin-top: auto;
}

.feature-list li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.8rem;
  margin-bottom: 0.5rem;
  color: var(--gray);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--accent-color);
  border-radius: 50%;
}

/* Stats Section */
.stats {
  padding: 4rem 0;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  text-align: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.stat-item h3 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.stat-item p {
  font-size: var(--font-size-md);
  opacity: 0.9;
}

/* Benefits Section */
.benefits {
  padding: 6rem 0;
  background: var(--light);
}

.benefits-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.benefits-text h2 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 2rem;
}

.benefits-text p {
  font-size: var(--font-size-lg);
  color: var(--gray);
  margin-bottom: 2rem;
}

.benefit-section {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: var(--white);
  border-radius: var(--radius-md);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--primary-color);
}

.benefit-section:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.benefit-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--dark);
  margin-bottom: 1rem;
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.benefit-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: white;
}

.benefits-list {
  list-style: none;
  padding-left: 0;
}

.benefits-list li {
  position: relative;
  padding: 0.5rem 0 0.5rem 1.8rem;
  margin-bottom: 0.5rem;
  color: var(--gray);
}

.benefits-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--accent-color);
  border-radius: 50%;
}

.benefits-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.benefits-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* FAQ Section */
.faq {
  padding: 6rem 0;
  background: var(--white);
}

.faq-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.faq-header h2 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 1rem;
}

.faq-header p {
  font-size: var(--font-size-lg);
  color: var(--gray);
}

.faq-grid {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 1.5rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  background: var(--light);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
}

.faq-question {
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  background: var(--white);
  transition: var(--transition);
}

.faq-question:hover {
  background: #f0f4ff;
}

.faq-question h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
  color: var(--dark);
  flex-grow: 1;
  text-align: left;
}

.faq-icon {
  min-width: 24px;
  height: 24px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 1rem;
  color: var(--primary-color);
}

.faq-icon svg {
  width: 100%;
  height: 100%;
  transition: var(--transition);
  transform: rotate(0);
}

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

.faq-answer {
  padding: 0 2rem;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  background: var(--white);
}

.faq-item.active .faq-answer {
  padding: 0 2rem 2rem;
  max-height: 1000px;
}

.faq-answer-content {
  padding-top: 1rem;
  border-top: 1px solid var(--light-gray);
}

.faq-answer-content p {
  color: var(--gray);
  margin-bottom: 1rem;
}

.faq-answer-content p:last-child {
  margin-bottom: 0;
}

.faq-answer-content ul,
.faq-answer-content ol {
  color: var(--gray);
  margin: 1rem 0;
  padding-left: 1.5rem;
}

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

.faq-answer-content strong {
  color: var(--primary-color);
}

/* Join Section */
.application {
  padding: 6rem 0;
  background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
  color: white;
  text-align: center;
}

.application h2 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.application p {
  font-size: var(--font-size-lg);
  max-width: 700px;
  margin: 0 auto 3rem;
  opacity: 0.9;
}

.join-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto 3rem;
}

.highlight-item {
  background: rgba(255, 255, 255, 0.1);
  padding: 2rem 1.5rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.highlight-item:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-5px);
}

.highlight-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: var(--transition);
}

.highlight-item:hover .highlight-icon {
  transform: scale(1.1);
}

.highlight-item h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 1rem;
}

.highlight-item p {
  opacity: 0.9;
  font-size: var(--font-size-sm);
}

.join-button {
  background: white;
  color: var(--primary-color);
  border: none;
  padding: 1.2rem 3rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-lg);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.join-button:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.join-note {
  font-size: var(--font-size-sm);
  opacity: 0.8;
  font-style: italic;
  max-width: 500px;
  margin: 0 auto;
}

/* Footer */
footer {
  background: var(--dark);
  color: white;
  padding: 5rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  color: #a0aec0;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.footer-links h4 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-links h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--primary-color);
  border-radius: var(--radius-full);
}

.footer-nav {
  list-style: none;
}

.footer-nav li {
  margin-bottom: 0.8rem;
}

.footer-nav a {
  color: #a0aec0;
  text-decoration: none;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-nav a:hover {
  color: white;
  transform: translateX(5px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  text-align: center;
  color: #a0aec0;
  font-size: var(--font-size-sm);
}

/* Cookie Consent */
.cookie-consent {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  right: 2rem;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 1.5rem;
  z-index: 10000;
  transform: translateY(100%);
  opacity: 0;
  transition: var(--transition);
  max-width: 400px;
  margin: 0 auto;
}

.cookie-consent.show {
  transform: translateY(0);
  opacity: 1;
}

.cookie-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--dark);
}

.cookie-body p {
  color: var(--gray);
  margin-bottom: 1.5rem;
  font-size: var(--font-size-sm);
}

.cookie-body a {
  color: var(--primary-color);
  text-decoration: none;
}

.cookie-body a:hover {
  text-decoration: underline;
}

.cookie-buttons {
  display: flex;
  gap: 1rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  flex: 1;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--light-gray);
  color: var(--dark);
}

.btn-secondary:hover {
  background: #d1d5db;
  transform: translateY(-2px);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 992px) {
  .benefits-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .benefits-image {
    order: -1;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.2rem;
  }

  .nav-links {
    display: none;
  }

  .hero-content h1 {
    font-size: var(--font-size-3xl);
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-features {
    flex-direction: column;
    gap: 1rem;
  }

  .features {
    padding: 4rem 0;
  }

  .benefits {
    padding: 4rem 0;
  }

  .faq {
    padding: 4rem 0;
  }

  .application {
    padding: 4rem 0;
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-nav a {
    justify-content: center;
  }

  .cookie-consent {
    left: 1rem;
    right: 1rem;
  }

  .cookie-buttons {
    flex-direction: column;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 1rem;
  }

  .hero-content {
    text-align: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .section-header h2 {
    font-size: var(--font-size-2xl);
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .join-highlights {
    grid-template-columns: 1fr;
  }
}