/* 美股合约交易平台 - 独特视觉系统 */
/* 配色：深紫红 + 荧光绿 + 碳黑 */
:root {
  --primary: #6B2FA0;
  --primary-dark: #4A1A6F;
  --accent: #00FF88;
  --accent-glow: rgba(0, 255, 136, 0.3);
  --bg-dark: #0A0A0F;
  --bg-card: #12121A;
  --text-white: #F0F0F5;
  --text-muted: #8888A0;
  --border-color: rgba(107, 47, 160, 0.3);
  --gradient-hero: linear-gradient(135deg, #0A0A0F 0%, #1A0A2E 50%, #0A0A0F 100%);
  --shadow-glow: 0 0 30px var(--accent-glow);
}

/* 基础重置 */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-dark);
  color: var(--text-white);
  overflow-x: hidden;
  line-height: 1.6;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* 核心布局 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--bg-card);
}

/* 导航 - 玻璃态深色 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.3s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.4rem;
  text-decoration: none;
  color: var(--text-white);
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 20px var(--accent-glow);
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
  50% { box-shadow: 0 0 40px var(--accent-glow), 0 0 60px var(--accent-glow); }
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.3s ease;
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.main-nav a:hover {
  color: var(--accent);
}

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

.nav-cta {
  padding: 10px 24px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), #8B3FCC);
  color: var(--text-white) !important;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(107, 47, 160, 0.4);
  transition: all 0.3s ease;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(107, 47, 160, 0.6);
  color: var(--text-white) !important;
}

.nav-cta::after {
  display: none !important;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* 首页Hero - 渐变流体 */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(107, 47, 160, 0.15) 0%, transparent 70%);
  animation: float-gradient 15s ease-in-out infinite;
}

@keyframes float-gradient {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(30px, -30px) rotate(3deg); }
  66% { transform: translate(-20px, 20px) rotate(-2deg); }
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  padding: 6px 18px;
  border-radius: 20px;
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid var(--accent);
  color: var(--accent);
  margin-bottom: 24px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--text-white) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
}

.hero-image {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-color);
  position: relative;
  z-index: 2;
}

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

/* 按钮 - 独特风格 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #8B3FCC);
  color: var(--text-white);
  box-shadow: 0 4px 20px rgba(107, 47, 160, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(107, 47, 160, 0.6);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: rgba(0, 255, 136, 0.1);
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateY(-2px);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(107, 47, 160, 0.15);
  color: var(--accent);
  margin-bottom: 16px;
  border: 1px solid rgba(0, 255, 136, 0.2);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.section-desc {
  max-width: 640px;
  color: var(--text-muted);
  margin-bottom: 48px;
  font-size: 1.05rem;
  line-height: 1.7;
}

/* 卡片网格 - 玻璃态 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.category-card {
  border-radius: 16px;
  padding: 32px;
  background: rgba(18, 18, 26, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(107, 47, 160, 0.05), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.category-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 0 0 20px var(--accent-glow);
}

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

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  position: relative;
  z-index: 1;
}

.category-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.category-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
  z-index: 1;
  transition: gap 0.3s ease;
}

.card-link:hover {
  gap: 12px;
}

/* 特性块 - 解构布局 */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

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

.feature-text h3 {
  font-size: 1.8rem;
  margin-bottom: 20px;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  color: var(--text-muted);
}

.feature-list li::before {
  content: '→';
  font-weight: 700;
  color: var(--accent);
  font-size: 1.1rem;
}

/* 数据条 - 大胆排版 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: 16px;
  background: rgba(18, 18, 26, 0.6);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.stat-item:hover {
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--text-white), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-weight: 500;
}

/* 内容墙 - 杂志风 */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.content-wall-item {
  border-radius: 16px;
  overflow: hidden;
  background: rgba(18, 18, 26, 0.6);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.content-wall-item:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.content-wall-item:hover img {
  transform: scale(1.05);
}

.content-wall-body {
  padding: 24px;
}

.content-wall-body h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.content-wall-body p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* FAQ - 独特手风琴 */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: rgba(18, 18, 26, 0.4);
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--accent);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--accent);
  transition: transform 0.3s ease;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fade-in 0.3s ease;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* CTA横幅 - 渐变冲击 */
.cta-banner {
  padding: 72px 24px;
  text-align: center;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), #8B3FCC);
  color: var(--text-white);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(107, 47, 160, 0.4);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(0, 255, 136, 0.1), transparent 60%);
  animation: rotate-glow 20s linear infinite;
}

@keyframes rotate-glow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.cta-banner h2 {
  color: var(--text-white);
  font-size: 2.2rem;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: var(--text-white);
  color: var(--primary);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: var(--accent);
  color: var(--bg-dark);
  box-shadow: 0 0 30px var(--accent-glow);
}

/* 页脚 - 暗色精致 */
.site-footer {
  padding: 64px 0 32px;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand p {
  color: var(--text-muted);
  margin-top: 16px;
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-white);
  letter-spacing: 1px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.3s ease;
}

.footer-col ul li a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* 工具类 */
.text-accent {
  color: var(--accent);
}

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

.seo-description {
  max-width: 640px;
  margin: 0 auto 48px;
  color: var(--text-muted);
  line-height: 1.7;
}

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

/* 响应式 */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.8rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero {
    min-height: 70vh;
    padding: 100px 0 60px;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  
  .main-nav {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
  }
  
  .main-nav.open a {
    padding: 12px 0;
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .content-wall {
    grid-template-columns: 1fr;
  }
  
  .stat-number {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: 12px;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .stats-bar {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .cta-banner {
    padding: 48px 20px;
  }
  
  .cta-banner h2 {
    font-size: 1.6rem;
  }
}