/* ============================================================
   HHPOKER 官网 — 自定义样式表
   Indigo 主题 · SaaS 风格 · 玻璃态导航 · 流畅动画
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --color-indigo-50: #eef2ff;
  --color-indigo-100: #e0e7ff;
  --color-indigo-200: #c7d2fe;
  --color-indigo-300: #a5b4fc;
  --color-indigo-400: #818cf8;
  --color-indigo-500: #6366f1;
  --color-indigo-600: #4f46e5;
  --color-indigo-700: #4338ca;
  --color-indigo-800: #3730a3;
  --color-indigo-900: #312e81;
  --color-indigo-950: #1e1b4b;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
}

/* ---------- 全局平滑滚动 ---------- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ---------- 自定义动画 ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
  }
  50% {
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.8), 0 0 60px rgba(99, 102, 241, 0.3);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-15px);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes countUp {
  from { opacity: 0; transform: scale(0.5); }
  to { opacity: 1; transform: scale(1); }
}

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

/* ---------- 玻璃态导航 ---------- */
.glass-nav {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(99, 102, 241, 0.12);
  transition: all 0.3s ease;
}

.glass-nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 30px rgba(99, 102, 241, 0.1);
}

/* ---------- 按钮样式 ---------- */
.btn-primary {
  background: linear-gradient(135deg, var(--color-indigo-600), var(--color-indigo-500));
  color: #fff;
  border-radius: var(--radius-2xl);
  padding: 0.75rem 2rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
  background: linear-gradient(135deg, var(--color-indigo-700), var(--color-indigo-600));
}

.btn-outline {
  background: transparent;
  color: var(--color-indigo-600);
  border: 2px solid var(--color-indigo-500);
  border-radius: var(--radius-2xl);
  padding: 0.75rem 2rem;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.btn-outline:hover {
  background: var(--color-indigo-50);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.2);
}

/* ---------- 功能卡片 ---------- */
.feature-card {
  background: #fff;
  border-radius: var(--radius-3xl);
  padding: 2rem;
  transition: all 0.35s ease;
  border: 1px solid rgba(99, 102, 241, 0.08);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-indigo-500), var(--color-indigo-400), var(--color-indigo-300));
  transform: scaleX(0);
  transition: transform 0.35s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: rgba(99, 102, 241, 0.2);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-2xl);
  background: linear-gradient(135deg, var(--color-indigo-50), var(--color-indigo-100));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-indigo-600);
  margin-bottom: 1.25rem;
  transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--color-indigo-500), var(--color-indigo-600));
  color: #fff;
  transform: rotateY(180deg);
}

/* ---------- 统计数字动画 ---------- */
.stat-number {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--color-indigo-600);
  line-height: 1;
}

.stat-label {
  color: #64748b;
  font-size: 1rem;
  margin-top: 0.5rem;
}

/* ---------- 评价卡片 ---------- */
.testimonial-card {
  background: #fff;
  border-radius: var(--radius-3xl);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(99, 102, 241, 0.06);
  transition: all 0.3s ease;
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2xl);
}

.testimonial-stars {
  color: #f59e0b;
  font-size: 1.1rem;
  letter-spacing: 2px;
}

/* ---------- FAQ 手风琴 ---------- */
.faq-item {
  border: 1px solid rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-2xl);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: all 0.3s ease;
  background: #fff;
}

.faq-item.active {
  border-color: var(--color-indigo-300);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.1);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  color: #1e293b;
  text-align: left;
  transition: color 0.3s ease;
}

.faq-item.active .faq-question {
  color: var(--color-indigo-700);
}

.faq-icon {
  font-size: 1rem;
  color: var(--color-indigo-400);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 1rem;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--color-indigo-600);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 1.5rem;
  color: #64748b;
  line-height: 1.7;
}

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

/* ---------- CTA 区域渐变 ---------- */
.cta-gradient {
  background: linear-gradient(135deg, var(--color-indigo-700), var(--color-indigo-600), var(--color-indigo-500));
  background-size: 200% 200%;
  animation: gradientShift 6s ease infinite;
}

/* ---------- 回到顶部按钮 ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-indigo-600), var(--color-indigo-500));
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.6);
}

/* ---------- 响应式调整 ---------- */
@media (max-width: 768px) {
  .stat-number {
    font-size: 2rem;
  }

  .feature-card {
    padding: 1.5rem;
  }

  .hero-title {
    font-size: 2rem !important;
  }

  .hero-subtitle {
    font-size: 1rem !important;
  }
}

/* ---------- 下载页面专用 ---------- */
.download-card {
  background: #fff;
  border-radius: var(--radius-3xl);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-xl);
  border: 2px solid transparent;
  transition: all 0.4s ease;
  text-align: center;
}

.download-card:hover {
  border-color: var(--color-indigo-400);
  transform: translateY(-6px);
  box-shadow: var(--shadow-2xl);
}

.download-card.android {
  background: linear-gradient(180deg, #fff 0%, #f0fdf4 100%);
}

.download-card.ios {
  background: linear-gradient(180deg, #fff 0%, #eef2ff 100%);
}

.download-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-2xl);
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
}

.download-icon.android {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #fff;
}

.download-icon.ios {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff;
}

/* ---------- 步骤条 ---------- */
.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-indigo-500), var(--color-indigo-600));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.step-line {
  width: 2px;
  flex-grow: 1;
  background: linear-gradient(180deg, var(--color-indigo-300), var(--color-indigo-100));
  margin-left: 19px;
  min-height: 40px;
}

/* ---------- 滚动条美化 ---------- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: var(--color-indigo-300);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-indigo-400);
}

/* ---------- 选中文字颜色 ---------- */
::selection {
  background: var(--color-indigo-200);
  color: var(--color-indigo-900);
}