@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #0a0e27;
  --bg-secondary: #111638;
  --bg-card: rgba(20, 27, 65, 0.7);
  --text-primary: #e8eaf6;
  --text-secondary: #9fa8da;
  --accent-green: #00e676;
  --accent-blue: #448aff;
  --accent-purple: #7c4dff;
  --accent-red: #ff5252;
  --accent-yellow: #ffd740;
  --gradient-main: linear-gradient(135deg, #448aff 0%, #7c4dff 50%, #e040fb 100%);
  --glass-bg: rgba(20, 27, 65, 0.6);
  --glass-border: rgba(255,255,255,0.08);
  --radius: 16px;
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background:
    linear-gradient(rgba(68,138,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(68,138,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none; z-index: 0;
}

a { color: var(--accent-blue); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-purple); }

img { max-width: 100%; height: auto; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }

/* ===== Header ===== */
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(10,14,39,0.92);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 24px; height: 64px;
  display: flex; align-items: center;
}
.header-inner {
  max-width: 1200px; margin: 0 auto; width: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; color: var(--text-primary); font-weight: 700; font-size: 1.15rem; }
.logo-icon { width: 36px; height: 36px; background: var(--gradient-main); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; }
.nav-menu { list-style: none; display: flex; gap: 28px; }
.nav-menu a { color: var(--text-secondary); font-size: 0.9rem; font-weight: 500; transition: color .2s; }
.nav-menu a:hover { color: var(--text-primary); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 5px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: .3s; }

/* ===== Hero ===== */
.hero {
  padding: 120px 20px 60px;
  text-align: center;
  position: relative; z-index: 1;
}
.hero-badge {
  display: inline-block;
  padding: 6px 20px;
  border: 1px solid var(--accent-blue);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--accent-blue);
  margin-bottom: 24px;
  background: rgba(68,138,255,0.08);
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.3;
  margin-bottom: 16px;
}
.hero-kw { color: var(--text-secondary); font-weight: 400; font-size: 1rem; margin-bottom: 20px; }
.hero-subtitle { color: var(--text-secondary); font-size: 1.05rem; max-width: 700px; margin: 0 auto 32px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 32px; }
.btn-primary {
  padding: 14px 36px; border-radius: 12px;
  background: var(--gradient-main); color: #fff;
  font-weight: 600; font-size: 1rem;
  box-shadow: 0 4px 20px rgba(68,138,255,0.3);
  transition: transform .2s, box-shadow .2s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 28px rgba(68,138,255,0.45); color: #fff; }
.btn-secondary {
  padding: 14px 36px; border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg); color: var(--text-primary);
  font-weight: 600; font-size: 1rem;
  backdrop-filter: blur(10px);
  transition: background .2s;
}
.btn-secondary:hover { background: rgba(68,138,255,0.15); color: #fff; }

/* ===== Search ===== */
.search-container {
  max-width: 600px; margin: 0 auto;
  display: flex; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
}
.search-input {
  flex: 1; padding: 14px 20px; background: transparent;
  border: none; color: var(--text-primary); font-size: 0.95rem; outline: none;
}
.search-input::placeholder { color: var(--text-secondary); }
.search-btn {
  padding: 14px 24px; background: var(--gradient-main);
  border: none; color: #fff; font-size: 1.1rem; cursor: pointer;
  transition: opacity .2s;
}
.search-btn:hover { opacity: 0.85; }

/* ===== Section ===== */
.section {
  padding: 70px 20px;
  position: relative; z-index: 1;
}
.section-badge {
  display: inline-block;
  padding: 4px 16px;
  border: 1px solid var(--accent-purple);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--accent-purple);
  margin-bottom: 16px;
  background: rgba(124,77,255,0.08);
}
.section h2 {
  font-size: 2rem; font-weight: 700; margin-bottom: 12px;
}
.section-desc {
  color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 40px;
}
.section-center { text-align: center; }

/* ===== Stats ===== */
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.stat-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: transform .3s;
}
.stat-card:hover { transform: translateY(-4px); }
.stat-value {
  font-size: 1.8rem; font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}
.stat-label { color: var(--text-secondary); font-size: 0.85rem; }

/* ===== Prices ===== */
.price-grid { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.price-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px 28px;
  min-width: 180px;
  backdrop-filter: blur(10px);
  transition: transform .3s;
}
.price-card:hover { transform: translateY(-3px); }
.price-name { font-weight: 700; margin-bottom: 6px; }
.price-value { font-size: 1.2rem; font-weight: 600; }
.price-change { font-size: 0.85rem; margin-top: 4px; }
.price-up { color: var(--accent-green); }
.price-down { color: var(--accent-red); }

/* ===== Alert Cards ===== */
.alert-list { display: flex; flex-direction: column; gap: 20px; }
.alert-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  backdrop-filter: blur(10px);
  transition: transform .3s;
}
.alert-card:hover { transform: translateY(-3px); }
.alert-meta { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.alert-level {
  padding: 3px 12px; border-radius: 6px; font-size: 0.8rem; font-weight: 600;
}
.alert-level.high { background: rgba(255,82,82,0.15); color: var(--accent-red); }
.alert-level.medium { background: rgba(255,215,64,0.15); color: var(--accent-yellow); }
.alert-level.good { background: rgba(0,230,118,0.15); color: var(--accent-green); }
.alert-chain { color: var(--text-secondary); font-size: 0.85rem; }
.alert-card h5 { font-size: 1.05rem; margin-bottom: 10px; }
.alert-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }
.alert-footer { display: flex; justify-content: space-between; margin-top: 12px; font-size: 0.8rem; color: var(--text-secondary); flex-wrap: wrap; gap: 8px; }

/* ===== Video Cards ===== */
.video-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.video-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .3s;
  cursor: pointer;
}
.video-card:hover { transform: translateY(-4px); }
.video-thumb {
  position: relative;
  height: 200px;
  background: linear-gradient(135deg, #1a237e, #4a148c);
  display: flex; align-items: center; justify-content: center;
}
.video-play {
  width: 60px; height: 60px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  backdrop-filter: blur(5px);
  transition: transform .3s, background .3s;
}
.video-card:hover .video-play { transform: scale(1.1); background: rgba(255,255,255,0.3); }
.video-info { padding: 20px; }
.video-info h6 { font-size: 1rem; margin-bottom: 8px; }
.video-info p { color: var(--text-secondary); font-size: 0.85rem; }

/* ===== Expert Cards ===== */
.expert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.expert-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(10px);
  transition: transform .3s;
}
.expert-card:hover { transform: translateY(-4px); }
.expert-avatar {
  width: 56px; height: 56px;
  background: var(--gradient-main);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; font-weight: 700;
  margin-bottom: 16px;
}
.expert-name { font-weight: 700; font-size: 1rem; }
.expert-title { color: var(--text-secondary); font-size: 0.8rem; margin-bottom: 14px; }
.expert-quote { color: var(--text-secondary); font-size: 0.9rem; font-style: italic; line-height: 1.7; }

/* ===== Review Cards ===== */
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(10px);
  transition: transform .3s;
}
.review-card:hover { transform: translateY(-4px); }
.review-stars { color: var(--accent-yellow); font-size: 1rem; margin-bottom: 14px; }
.review-text { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; margin-bottom: 16px; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 40px; height: 40px;
  background: var(--gradient-main);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem;
}
.review-info .name { font-weight: 600; font-size: 0.9rem; }
.review-info .date { color: var(--text-secondary); font-size: 0.8rem; }

/* ===== Community ===== */
.community-list { display: flex; flex-direction: column; gap: 20px; }
.community-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  backdrop-filter: blur(10px);
  transition: transform .3s;
}
.community-card:hover { transform: translateY(-3px); }
.community-user { font-weight: 700; color: var(--accent-blue); margin-bottom: 10px; }
.community-text { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; margin-bottom: 12px; }
.community-actions { display: flex; gap: 20px; font-size: 0.85rem; color: var(--text-secondary); }

/* ===== Download Section ===== */
.download-section {
  padding: 70px 20px;
  text-align: center;
  position: relative; z-index: 1;
}
.download-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 32px; }
.download-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: transform .3s;
  display: block; color: var(--text-primary);
}
.download-card:hover { transform: translateY(-4px); color: #fff; }
.download-icon { font-size: 2rem; margin-bottom: 12px; }
.download-card .dl-title { font-weight: 600; font-size: 0.95rem; }

/* ===== Share ===== */
.share-bar {
  display: flex; gap: 12px; justify-content: center; margin-top: 32px; flex-wrap: wrap;
}
.share-btn {
  padding: 10px 20px; border-radius: 10px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-size: 0.85rem; cursor: pointer;
  transition: background .2s, color .2s;
}
.share-btn:hover { background: rgba(68,138,255,0.15); color: var(--text-primary); }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: 50px 20px 30px;
  position: relative; z-index: 1;
}
.footer-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  margin-bottom: 40px;
}
.footer-title { font-weight: 700; font-size: 1rem; margin-bottom: 16px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-secondary); font-size: 0.85rem; }
.footer-links a:hover { color: var(--text-primary); }
.footer-contact p { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 8px; }
.footer-bottom {
  max-width: 1200px; margin: 0 auto;
  border-top: 1px solid var(--glass-border);
  padding-top: 20px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { color: var(--text-secondary); font-size: 0.8rem; }

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 80px 20px 20px;
  max-width: 1200px; margin: 0 auto;
  font-size: 0.85rem; color: var(--text-secondary);
  position: relative; z-index: 1;
}
.breadcrumb a { color: var(--accent-blue); }
.breadcrumb span { margin: 0 8px; }

/* ===== Page Content (Inner Pages) ===== */
.page-content {
  max-width: 900px; margin: 0 auto; padding: 20px 20px 60px;
  position: relative; z-index: 1;
}
.page-content h1 {
  font-size: 2rem; font-weight: 800; margin-bottom: 20px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-content .intro {
  color: var(--text-secondary); font-size: 1rem; line-height: 1.8;
  margin-bottom: 40px; padding: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}
.content-section {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}
.content-section h3 {
  font-size: 1.2rem; font-weight: 700; margin-bottom: 16px;
  color: var(--accent-blue);
}
.content-section p {
  color: var(--text-secondary); font-size: 0.95rem; line-height: 1.8;
}

/* ===== Guide Steps ===== */
.guide-steps { counter-reset: step; }
.guide-step {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
  cursor: pointer;
  transition: transform .2s;
}
.guide-step:hover { transform: translateY(-2px); }
.guide-step h3 {
  font-size: 1.1rem; font-weight: 700; margin-bottom: 14px;
  color: var(--accent-blue);
}
.guide-step .step-content {
  color: var(--text-secondary); font-size: 0.95rem; line-height: 1.8;
  max-height: 0; overflow: hidden;
  transition: max-height .4s ease, padding .4s ease;
}
.guide-step.active .step-content {
  max-height: 500px; padding-top: 4px;
}
.guide-step .step-toggle {
  float: right; color: var(--accent-blue); font-size: 1.2rem;
  transition: transform .3s;
}
.guide-step.active .step-toggle { transform: rotate(180deg); }

/* ===== Forum Topics ===== */
.topic-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
  transition: transform .3s;
}
.topic-card:hover { transform: translateY(-3px); }
.topic-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; flex-wrap: wrap; gap: 8px; }
.topic-title { font-weight: 700; font-size: 1.05rem; }
.topic-meta { display: flex; gap: 16px; font-size: 0.8rem; color: var(--text-secondary); }
.topic-content { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

/* ===== Article Cards ===== */
.article-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
  transition: transform .3s;
}
.article-card:hover { transform: translateY(-3px); }
.article-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  background: rgba(68,138,255,0.15);
  color: var(--accent-blue);
  margin-bottom: 12px;
}
.article-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; }
.article-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }
.article-date { color: var(--text-secondary); font-size: 0.8rem; margin-top: 12px; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .download-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; position: absolute; top: 64px; left: 0; width: 100%; background: rgba(10,14,39,0.98); flex-direction: column; padding: 20px; gap: 16px; border-bottom: 1px solid var(--glass-border); }
  .nav-menu.active { display: flex; }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 1.8rem; }
  .hero { padding: 100px 16px 40px; }
  .hero-subtitle { font-size: 0.95rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-value { font-size: 1.4rem; }
  .expert-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 50px 16px; }
  .section h2 { font-size: 1.5rem; }
  .price-grid { gap: 10px; }
  .price-card { min-width: 140px; padding: 16px 20px; }
  .page-content h1 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.5rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 20px 12px; }
  .stat-value { font-size: 1.2rem; }
  .download-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .btn-primary, .btn-secondary { width: 100%; text-align: center; }
}