/* 美股交易网站 - 科技驱动创新 - 独特视觉系统 */
/* 灵感：暗色渐变流体 + 霓虹数字科技 + 玻璃态 + 动态网格 */

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: #0b0e1a;
  color: #e0e6f0;
  line-height: 1.6;
}

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

.section { padding:80px 0; position:relative; }

.section:nth-child(even) { 
  background: linear-gradient(135deg, #0f1324 0%, #1a1f35 100%);
}

/* 独特配色：深紫黑底 + 霓虹青绿 + 荧光粉紫点缀 */
:root {
  --neon-cyan: #00f0ff;
  --neon-purple: #b44aff;
  --neon-pink: #ff3dc4;
  --dark-bg: #0b0e1a;
  --card-bg: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --text-primary: #e0e6f0;
  --text-muted: rgba(224,230,240,0.6);
  --accent-gradient: linear-gradient(135deg, #00f0ff, #b44aff);
}

/* 导航 — 固定顶部 */
.site-header { 
  position:fixed; top:0; left:0; width:100%; z-index:1000; 
  background: rgba(11,14,26,0.85); 
  backdrop-filter:blur(20px) saturate(1.4); 
  border-bottom:1px solid var(--glass-border);
  transition: background 0.3s;
}

.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:10px; 
  font-weight:800; font-size:1.3rem; text-decoration:none; 
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.logo-icon { 
  width:40px; height:40px; border-radius:12px; 
  display:flex; align-items:center; justify-content:center; 
  font-size:1.2rem;
  background: var(--accent-gradient);
  color: #0b0e1a;
  font-weight:900;
  box-shadow: 0 0 20px rgba(0,240,255,0.3);
}

.main-nav { display:flex; align-items:center; gap:28px; list-style:none; }

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

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

.main-nav a:hover { color: var(--neon-cyan); }
.main-nav a:hover::after { width:100%; }

.nav-cta { 
  padding:10px 24px; border-radius:50px; 
  color:#0b0e1a!important; font-weight:700; 
  background: var(--accent-gradient);
  box-shadow: 0 0 25px rgba(0,240,255,0.25);
  transition: all 0.3s!important;
}

.nav-cta:hover { 
  transform: scale(1.05);
  box-shadow: 0 0 40px rgba(0,240,255,0.45);
  color:#0b0e1a!important;
}

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

.menu-toggle { 
  display:none; 
  background: none; border: none; color: var(--text-primary);
  font-size:1.5rem; cursor:pointer;
  width:44px; height:44px; align-items:center; justify-content:center;
  border-radius:10px;
  background: rgba(255,255,255,0.05);
}

/* 首页Hero */
.hero { 
  min-height:85vh; display:flex; align-items:center; 
  position:relative;
  background: radial-gradient(ellipse at 20% 50%, rgba(0,240,255,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 30%, rgba(180,74,255,0.06) 0%, transparent 50%);
}

.hero::before {
  content:'';
  position:absolute;
  top:0; left:0; right:0; bottom:0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300f0ff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity:0.5;
  pointer-events:none;
}

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

.hero-eyebrow { 
  display:inline-block; font-size:0.8rem; font-weight:700; 
  padding:6px 18px; border-radius:50px; margin-bottom:20px;
  background: rgba(0,240,255,0.1);
  color: var(--neon-cyan);
  border: 1px solid rgba(0,240,255,0.2);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero h1 { 
  font-size:3.5rem; line-height:1.1; margin-bottom:20px;
  font-weight:800;
  background: linear-gradient(135deg, #e0e6f0 0%, #00f0ff 50%, #b44aff 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:36px; 
  line-height:1.7;
}

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

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

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

/* 按钮 */
.btn { 
  display:inline-flex; align-items:center; gap:10px; 
  padding:14px 32px; border-radius:50px; 
  font-weight:700; cursor:pointer; border:none; 
  text-decoration:none; transition:0.3s; 
  font-size:0.95rem;
  letter-spacing: 0.3px;
}

.btn-primary { 
  color:#0b0e1a; 
  background: var(--accent-gradient);
  box-shadow: 0 0 30px rgba(0,240,255,0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(0,240,255,0.35);
}

.btn-outline { 
  background:transparent; 
  border:1.5px solid rgba(0,240,255,0.4); 
  color: var(--neon-cyan);
}

.btn-outline:hover {
  border-color: var(--neon-cyan);
  background: rgba(0,240,255,0.08);
  box-shadow: 0 0 30px rgba(0,240,255,0.15);
}

/* 标签/标题 */
.section-label { 
  display:inline-block; font-size:0.75rem; font-weight:700; 
  letter-spacing:3px; margin-bottom:14px;
  color: var(--neon-cyan);
  text-transform: uppercase;
}

.section-title { 
  font-size:2.4rem; margin-bottom:16px; 
  font-weight:800;
  line-height:1.2;
}

.section-desc { 
  max-width:600px; 
  color: var(--text-muted); 
  margin-bottom:44px; 
  font-size:1.05rem;
  line-height:1.7;
}

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

.category-card { 
  border-radius:16px; padding:32px; 
  border:1px solid var(--glass-border);
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  transition:0.4s cubic-bezier(0.25,0.46,0.45,0.94);
  position:relative;
  overflow:hidden;
}

.category-card::before {
  content:'';
  position:absolute;
  top:0; left:0; right:0; bottom:0;
  background: linear-gradient(135deg, rgba(0,240,255,0.05), rgba(180,74,255,0.05));
  opacity:0;
  transition: opacity 0.4s;
}

.category-card:hover { 
  transform:translateY(-6px); 
  border-color: rgba(0,240,255,0.3);
  box-shadow:0 8px 32px rgba(0,0,0,0.4);
}

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

.card-icon { 
  width:52px; height:52px; border-radius:14px; 
  display:flex; align-items:center; justify-content:center; 
  margin-bottom:20px; font-size:1.5rem;
  background: rgba(0,240,255,0.08);
  color: var(--neon-cyan);
  position:relative;
  z-index:1;
}

.category-card h3 {
  font-size:1.25rem;
  margin-bottom:10px;
  position:relative;
  z-index:1;
}

.category-card p {
  color: var(--text-muted);
  font-size:0.9rem;
  margin-bottom:16px;
  position:relative;
  z-index:1;
}

.card-link { 
  font-weight:700; font-size:0.85rem; text-decoration:none; 
  color: var(--neon-cyan);
  display:inline-flex;
  align-items:center;
  gap:6px;
  position:relative;
  z-index:1;
  transition: gap 0.3s;
}

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

/* 特性块 */
.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(--glass-border);
  box-shadow: 0 15px 40px rgba(0,0,0,0.4);
}

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

.feature-text { }

.feature-text .section-title {
  font-size:2.2rem;
}

.feature-list { list-style:none; margin-top:20px; }

.feature-list li { 
  padding:10px 0; display:flex; align-items:center; gap:12px; 
  font-size:1rem;
  color: rgba(224,230,240,0.85);
}

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

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

.stat-item { 
  padding:32px 20px; border-radius:16px; 
  border:1px solid var(--glass-border);
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  transition: transform 0.3s;
}

.stat-item:hover {
  transform: scale(1.03);
  border-color: rgba(0,240,255,0.2);
}

.stat-number { 
  font-size:2.8rem; font-weight:900; 
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height:1.1;
}

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

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

.content-wall-item { 
  border-radius:16px; overflow:hidden; 
  border:1px solid var(--glass-border);
  background: var(--card-bg);
  transition:0.4s cubic-bezier(0.25,0.46,0.45,0.94); 
  backdrop-filter: blur(8px);
}

.content-wall-item:hover { 
  transform:translateY(-6px); 
  box-shadow:0 10px 40px rgba(0,0,0,0.5);
  border-color: rgba(180,74,255,0.3);
}

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

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

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

.content-wall-body h4 {
  font-size:1.15rem;
  margin-bottom:8px;
}

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

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

.faq-item { 
  border:1px solid var(--glass-border); 
  border-radius:12px; margin-bottom:10px; 
  overflow:hidden; cursor:pointer; 
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  transition: border-color 0.3s;
}

.faq-item:hover {
  border-color: rgba(0,240,255,0.2);
}

.faq-item .faq-question { 
  padding:18px 24px; font-weight:600; 
  display:flex; justify-content:space-between; 
  align-items:center;
  font-size:1.05rem;
  transition: background 0.3s;
}

.faq-item .faq-question::after {
  content:'+';
  font-size:1.4rem;
  color: var(--neon-cyan);
  transition: transform 0.3s;
}

.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; }

/* CTA横幅 */
.cta-banner { 
  padding:64px 32px; text-align:center; 
  border-radius:20px; 
  background: linear-gradient(135deg, rgba(0,240,255,0.12), rgba(180,74,255,0.12));
  border:1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  position:relative;
  overflow:hidden;
}

.cta-banner::before {
  content:'';
  position:absolute;
  top:-50%; left:-50%; width:200%; height:200%;
  background: radial-gradient(circle at 30% 50%, rgba(0,240,255,0.06), transparent 60%);
  animation: ctaGlow 8s ease-in-out infinite alternate;
}

@keyframes ctaGlow {
  0% { transform: translate(0,0); }
  100% { transform: translate(5%,5%); }
}

.cta-banner h2 { 
  color: var(--text-primary); 
  font-size:2rem;
  position:relative;
  z-index:1;
}

.cta-banner p {
  color: var(--text-muted);
  max-width:500px;
  margin: 16px auto 28px;
  position:relative;
  z-index:1;
}

.cta-banner .btn-primary { 
  background: #fff; 
  color: #0b0e1a;
  box-shadow: 0 0 30px rgba(255,255,255,0.15);
  position:relative;
  z-index:1;
}

.cta-banner .btn-primary:hover {
  box-shadow: 0 0 50px rgba(255,255,255,0.3);
  transform: translateY(-2px);
}

/* 页脚 */
.site-footer { 
  padding:64px 0 32px; 
  border-top: 1px solid var(--glass-border);
  background: rgba(11,14,26,0.8);
}

.site-footer .container { }

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

.footer-brand { }

.footer-brand .logo {
  margin-bottom:16px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size:0.9rem;
  max-width:300px;
  line-height:1.7;
}

.footer-col { }

.footer-col h5 {
  font-size:0.9rem;
  font-weight:700;
  margin-bottom:16px;
  text-transform: uppercase;
  letter-spacing:1px;
  color: var(--neon-cyan);
}

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

.footer-col ul li {
  margin-bottom:8px;
}

.footer-col ul li a {
  color: var(--text-muted);
  text-decoration:none;
  font-size:0.9rem;
  transition: color 0.3s;
}

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

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

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

.seo-description { 
  max-width:600px; margin:0 auto 48px; 
  color: var(--text-muted); 
  line-height:1.7;
}

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

/* 装饰性网格背景 */
.grid-bg {
  position:absolute;
  top:0; left:0; right:0; bottom:0;
  background-image: 
    linear-gradient(rgba(0,240,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,240,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events:none;
}

/* 响应式 */
@media (max-width: 1024px) {
  .hero h1 { font-size:2.8rem; }
  .section-title { font-size:2rem; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
}

@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; gap:40px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  
  .main-nav { 
    display:none; 
    position:absolute; top:72px; left:0; width:100%; 
    background: rgba(11,14,26,0.98);
    backdrop-filter: blur(20px);
    padding:24px;
    border-bottom: 1px solid var(--glass-border);
    flex-direction:column;
    gap:16px;
  }
  
  .menu-toggle { display:flex; }
  .main-nav.open { display:flex; }
  
  .hero { min-height:70vh; }
  .hero h1 { font-size:2.2rem; }
  .hero p { font-size:1rem; }
  .hero-buttons { flex-direction:column; }
  
  .section { padding:60px 0; }
  .section-title { font-size:1.8rem; }
  
  .content-wall { grid-template-columns:1fr; }
  .cards-grid { grid-template-columns:1fr; }
}

@media (max-width: 480px) {
  .cards-grid, .content-wall, .stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; gap:24px; }
  .hero-buttons { flex-direction:column; }
  
  .hero h1 { font-size:1.8rem; }
  .section-title { font-size:1.5rem; }
  .stat-number { font-size:2rem; }
  
  .header-inner { height:64px; }
  .main-nav { top:64px; }
  
  .btn { padding:12px 24px; font-size:0.9rem; }
  .cta-banner { padding:40px 20px; }
  .cta-banner h2 { font-size:1.5rem; }
}