/* 使用系统字体：Google Fonts 在中国大陆加载慢/被墙，会拖慢首屏 */

:root {
  --primary: #6366f1; /* 活力靛蓝 */
  --primary-hover: #4f46e5;
  --secondary: #ec4899; /* 萌动元气粉 */
  --secondary-hover: #db2777;
  --accent: #00c6ff; /* 天空蓝 */
  --highlight: #ffb800; /* 闪耀黄 */
  --text-main: #1e293b;
  --text-muted: #64748b;
  --bg-gradient-1: #f8fafc;
  --bg-gradient-2: #e0e7ff;
  --bg-gradient-3: #fce7f3;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-shadow: 0 20px 40px -15px rgba(99, 102, 241, 0.15);
  --border-color: rgba(255, 255, 255, 0.6);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  color: var(--text-main);
  background-color: var(--bg-gradient-1);
  overflow-x: hidden;
}

body {
  position: relative;
  overflow-x: hidden;
  background: linear-gradient(135deg, var(--bg-gradient-1) 0%, var(--bg-gradient-2) 50%, var(--bg-gradient-3) 100%);
  background-size: 400% 400%;
  animation: backgroundShift 15s ease infinite;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@keyframes backgroundShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* 装饰性动效背景气泡 */
.bg-bubbles {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  overflow: hidden; pointer-events: none; z-index: 0;
}
.bubble {
  position: absolute;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(236, 72, 153, 0.2));
  border-radius: 50%;
  filter: blur(40px);
  animation: floatBubble 10s infinite alternate;
}
.bubble-1 { top: -10%; left: -10%; width: 50vw; height: 50vw; }
.bubble-2 { top: 40%; right: -10%; width: 45vw; height: 45vw; animation-delay: -3s; }
.bubble-3 { bottom: -10%; left: 20%; width: 60vw; height: 60vw; animation-delay: -6s; }

@keyframes floatBubble {
  0% { transform: translateY(0) scale(1); }
  100% { transform: translateY(-50px) scale(1.1); }
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 10;
}

/* 顶部导航 */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 10px 30px 0 rgba(0,0,0,0.05);
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  font-size: 36px;
  animation: bounceLogo 3s infinite ease-in-out;
  display: inline-block;
}

@keyframes bounceLogo {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-6px) rotate(8deg); }
}

.logo-text {
  font-size: 26px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-main);
  font-weight: 600;
  font-size: 16px;
  transition: var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

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

.nav-cta .btn {
  padding: 10px 24px;
  font-size: 15px;
}

/* 按钮通用样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 50px;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
  color: white;
  box-shadow: 0 10px 20px -5px rgba(236, 72, 153, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 25px -5px rgba(236, 72, 153, 0.6);
  background: linear-gradient(135deg, var(--secondary-hover) 0%, var(--primary-hover) 100%);
}

.btn-secondary {
  background: white;
  color: var(--primary);
  box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.1);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  background: var(--primary);
  color: white;
  box-shadow: 0 15px 25px -5px rgba(99, 102, 241, 0.4);
}

/* 主视觉 Hero Section */
.hero {
  padding: 80px 0 120px;
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  position: relative;
}

.tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.8);
  padding: 8px 20px;
  border-radius: 50px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 24px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.05);
  border: 1px solid var(--border-color);
  animation: slideDown 0.8s ease-out;
}

@keyframes slideDown {
  0% { opacity: 0; transform: translateY(-20px); }
  100% { opacity: 1; transform: translateY(0); }
}

.hero-title {
  font-size: 56px;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  color: var(--text-main);
  animation: fadeIn 1s ease-out 0.2s backwards;
}

.hero-title span {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  position: relative;
}

.hero-subtitle {
  font-size: 20px;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 40px;
  animation: fadeIn 1s ease-out 0.4s backwards;
}

@keyframes fadeIn {
  0% { opacity: 0; transform: translateY(20px); }
  100% { opacity: 1; transform: translateY(0); }
}

.hero-cta {
  display: flex;
  gap: 20px;
  align-items: center;
  margin-bottom: 48px;
  animation: fadeIn 1s ease-out 0.6s backwards;
}

.hero-cta .btn {
  padding: 16px 36px;
  font-size: 18px;
}

.feature-badges {
  display: flex;
  gap: 24px;
  animation: fadeIn 1s ease-out 0.8s backwards;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-main);
  background: var(--card-bg);
  padding: 8px 16px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
  border: 1px solid var(--border-color);
}

.badge-item i {
  font-size: 20px;
}

/* 英雄区插图动画 */
.hero-artwork {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: floatArtwork 6s ease-in-out infinite alternate;
}

@keyframes floatArtwork {
  0% { transform: translateY(0px) rotate(0deg); }
  100% { transform: translateY(-20px) rotate(2deg); }
}

.artwork-wrapper {
  position: relative;
  width: 100%;
  max-width: 500px;
  aspect-ratio: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 飞天猪SVG样式 */
.flying-pig-svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 30px 40px rgba(99, 102, 241, 0.3));
}

.wing {
  transform-origin: 50% 50%;
  animation: flapWing 0.4s infinite alternate ease-in-out;
}

@keyframes flapWing {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(-25deg); }
}

.speed-line {
  stroke-dasharray: 100;
  animation: dash 1.5s linear infinite;
}

@keyframes dash {
  to { stroke-dashoffset: -200; }
}

/* 核心优势介绍 Section */
.features {
  padding: 120px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-tag {
  color: var(--primary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 14px;
  margin-bottom: 12px;
  display: inline-block;
  background: rgba(99, 102, 241, 0.1);
  padding: 6px 16px;
  border-radius: 50px;
}

.section-title {
  font-size: 42px;
  font-weight: 900;
  margin-bottom: 20px;
  line-height: 1.2;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-muted);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.feature-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 40px 28px;
  transition: var(--transition);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 6px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 30px 60px -15px rgba(99, 102, 241, 0.25);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(236,72,153,0.1) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 24px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
}

.feature-title {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-main);
}

.feature-desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* 套餐价格对比表 Pricing Section */
.pricing {
  padding: 120px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  align-items: center;
}

.pricing-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 32px;
  padding: 48px 36px;
  transition: var(--transition);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.popular {
  background: white;
  border: 2px solid var(--secondary);
  box-shadow: 0 30px 70px -15px rgba(236, 72, 153, 0.25);
  transform: scale(1.05);
  z-index: 2;
}

.pricing-card.popular:hover {
  transform: scale(1.08) translateY(-5px);
}

.pricing-card:hover {
  transform: translateY(-10px);
}

.popular-badge {
  position: absolute;
  top: -16px; right: 36px;
  background: linear-gradient(135deg, var(--secondary) 0%, #ff758c 100%);
  color: white;
  font-weight: 800;
  font-size: 14px;
  padding: 8px 20px;
  border-radius: 50px;
  box-shadow: 0 8px 20px rgba(236, 72, 153, 0.4);
}

.pricing-header {
  margin-bottom: 32px;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  padding-bottom: 32px;
}

.pkg-title {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 12px;
}

.pkg-desc {
  font-size: 15px;
  color: var(--text-muted);
}

.pricing-price {
  margin-top: 24px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.currency {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
}

.amount {
  font-size: 54px;
  font-weight: 900;
  line-height: 1;
  color: var(--text-main);
}

.popular .currency, .popular .amount {
  color: var(--secondary);
}

.period {
  font-size: 16px;
  color: var(--text-muted);
  font-weight: 600;
}

.pricing-features {
  list-style: none;
  margin-bottom: 40px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  font-size: 16px;
  color: var(--text-main);
  font-weight: 500;
}

.pricing-features li i {
  color: #10b981;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pricing-features li.disabled {
  color: var(--text-muted);
  opacity: 0.5;
}

.pricing-features li.disabled i {
  color: #ef4444;
}

.pricing-card .btn {
  width: 100%;
  padding: 16px;
  font-size: 18px;
}

/* 常见问题解答 FAQ Section */
.faq {
  padding: 120px 0;
  position: relative;
}

.faq-container {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.faq-item {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 30px 36px;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}

.faq-item:hover {
  transform: translateX(5px);
  border-color: var(--primary);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.faq-question i {
  color: var(--secondary);
  font-size: 24px;
}

.faq-answer {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-muted);
  padding-left: 40px;
}

/* 独立文书页面专用样式 (About / Terms / Privacy) */
.page-wrapper {
  padding: 80px 0 120px;
  flex-grow: 1;
}

.doc-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 32px;
  padding: 64px 80px;
  box-shadow: var(--card-shadow);
  max-width: 900px;
  margin: 0 auto;
}

.doc-card h1 {
  font-size: 42px;
  font-weight: 900;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.doc-card h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-main);
  margin: 40px 0 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.doc-card h2 i {
  color: var(--secondary);
}

.doc-card p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.doc-card ul {
  list-style-type: none;
  margin-bottom: 24px;
  padding-left: 12px;
}

.doc-card ul li {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 12px;
  position: relative;
  padding-left: 24px;
}

.doc-card ul li::before {
  content: '⚡';
  position: absolute;
  left: 0; top: 0;
  font-size: 14px;
}

/* 页脚 Footer */
footer {
  background: #0f172a;
  color: #f8fafc;
  padding: 80px 0 40px;
  margin-top: auto;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.footer-col h4 {
  font-size: 20px;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
  display: inline-block;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 30px; height: 3px;
  background: var(--secondary);
  border-radius: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 36px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #64748b;
  font-size: 14px;
}

/* 响应式设计 Mobile Responsiveness */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  .tagline { margin: 0 auto 24px; }
  .hero-cta { justify-content: center; }
  .feature-badges { justify-content: center; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .pricing-card.popular { transform: none; }
  .pricing-card.popular:hover { transform: translateY(-5px); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .doc-card { padding: 48px 40px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero-title { font-size: 40px; }
  .hero-subtitle { font-size: 18px; }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; text-align: center; }
  .footer-col h4::after { left: 50%; transform: translateX(-50%); }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
  .feature-card { padding: 32px 24px; align-items: center; text-align: center; }
  .pricing-card { padding: 36px 24px; }
  .doc-card { padding: 36px 24px; }
  .doc-card h1 { font-size: 32px; }
}