/* ============================================================
   小鱼POKER 官网 — 自定义样式表
   Indigo 主题 · 安全/趣味/社区 · SaaS 风格
   ============================================================ */

/* ---------- 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;
}

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

@keyframes floatSlow {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(3deg); }
}

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

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(99, 102, 241, 0.4); }
  50% { box-shadow: 0 0 40px rgba(99, 102, 241, 0.7), 0 0 60px rgba(99, 102, 241, 0.25); }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.8); }
  to { opacity: 1; transform: scale(1); }
}

/* ---------- 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: 1rem;
  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: 1rem;
  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: 1.5rem;
  padding: 2rem;
  transition: all 0.35s ease;
  border: 1px solid rgba(99, 102, 241, 0.08);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  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: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  border-color: rgba(99, 102, 241, 0.2);
}

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

.feature-icon {
  width: 56px; height: 56px;
  border-radius: 1rem;
  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 ---------- */
.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: 1.5rem;
  padding: 2rem;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.06);
  transition: all 0.3s ease;
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.testimonial-avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem; color: #fff;
  flex-shrink: 0;
}

/* ---------- FAQ 手风琴 ---------- */
.faq-item {
  border: 1px solid rgba(99, 102, 241, 0.1);
  border-radius: 1rem;
  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 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 ---------- */
.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);
}

/* ---------- 安全徽章 ---------- */
.safety-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 1rem;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #15803d;
}

/* ---------- 社区标签 ---------- */
.community-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 1rem;
  background: var(--color-indigo-50);
  border: 1px solid var(--color-indigo-200);
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-indigo-700);
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .stat-number { font-size: 2rem; }
  .feature-card { padding: 1.5rem; }
}

/* ---------- 滚动条和选中 ---------- */
::-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); }
::selection { background: var(--color-indigo-200); color: var(--color-indigo-900); }