:root {
  --bg-dark: #0f172a;
  --bg-card: #1e293b;
  --bg-deep: #111827;
  --gray: #64748b;
  --silver: #cbd5e1;
  --accent: #991b1b;
  --accent-hover: #b91c1c;
  --text: #94a3b8;
  --white: #f1f5f9;
  --radius: 14px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
  background: linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-dark) 100%);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 {
  font-family: inherit;
  color: var(--white);
  font-weight: 700;
  line-height: 1.3;
}
a {
  font-family: inherit;
  color: var(--silver);
  text-decoration: none;
  transition: color 0.3s ease;
}
a:hover {
  color: var(--white);
}
img {
  max-width: 100%;
  display: block;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header & Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(100, 116, 139, 0.2);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--white);
}
.nav-brand img {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: cover;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.nav-links a {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--silver);
  background: transparent;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}
.nav-links a:hover {
  color: var(--white);
  background: rgba(100, 116, 139, 0.15);
  border-color: rgba(100, 116, 139, 0.3);
}

/* ===== Hero ===== */
.hero-section {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px 60px;
}
.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: 0.4;
}
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(15,23,42,0.7) 0%, rgba(15,23,42,0.9) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 880px;
}
.hero-content h1 {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 24px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
  background: linear-gradient(135deg, var(--white), var(--silver));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-content .geo-desc {
  font-size: 17px;
  line-height: 1.9;
  color: var(--text);
  margin-bottom: 36px;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--accent-hover), var(--accent));
  color: var(--white);
  border-radius: 8px;
  font-weight: 700;
  font-size: 16px;
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 4px 20px rgba(153, 27, 27, 0.3);
  transition: all 0.3s ease;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(153, 27, 27, 0.5);
  color: var(--white);
}
.btn-secondary {
  display: inline-block;
  padding: 14px 32px;
  background: rgba(100, 116, 139, 0.15);
  color: var(--silver);
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  border: 1px solid rgba(100, 116, 139, 0.3);
  transition: all 0.3s ease;
}
.btn-secondary:hover {
  background: rgba(100, 116, 139, 0.25);
  color: var(--white);
}

/* ===== Section general ===== */
.section {
  padding: 80px 24px;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 {
  font-size: 34px;
  font-weight: 800;
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
}
.section-header h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  border-radius: 2px;
}
.section-header p {
  margin-top: 12px;
  color: var(--text);
  font-size: 16px;
}

/* ===== Stats ===== */
.stats-section {
  background: linear-gradient(160deg, rgba(30, 41, 59, 0.4), rgba(15, 23, 42, 0.8));
  position: relative;
  overflow: hidden;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  text-align: center;
  padding: 36px 20px;
  background: linear-gradient(145deg, rgba(30,41,59,0.8), rgba(15,23,42,0.9));
  border: 1px solid rgba(100, 116, 139, 0.2);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  transition: all 0.4s ease;
}
.stat-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 8px 40px rgba(153, 27, 27, 0.15);
}
.stat-card .stat-num {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--white), var(--silver));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stat-card .stat-label {
  margin-top: 8px;
  font-size: 15px;
  color: var(--text);
}
.stat-card img {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  object-fit: contain;
  opacity: 0.8;
}

/* ===== Advantages ===== */
.advantages-section {
  background: var(--bg-dark);
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.adv-card {
  padding: 32px 28px;
  background: linear-gradient(145deg, rgba(30,41,59,0.7), rgba(15,23,42,0.9));
  border: 1px solid rgba(100, 116, 139, 0.15);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  transition: all 0.4s ease;
}
.adv-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(153, 27, 27, 0.12);
}
.adv-card .adv-icon {
  font-size: 36px;
  margin-bottom: 16px;
}
.adv-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}
.adv-card p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}

/* ===== Story ===== */
.story-section {
  background: linear-gradient(135deg, #0f172a, #1a2332);
}
.story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.story-image img {
  border-radius: var(--radius);
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
}
.story-content h2 {
  font-size: 32px;
  margin-bottom: 20px;
}
.story-content p {
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.8;
}
.story-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(153, 27, 27, 0.15);
  color: var(--accent-hover);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 16px;
  border: 1px solid rgba(153, 27, 27, 0.3);
}

/* ===== Events ===== */
.events-section {
  background: var(--bg-dark);
}
.events-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.event-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 6px 24px rgba(0,0,0,0.3);
  transition: all 0.4s ease;
  background: linear-gradient(145deg, rgba(30,41,59,0.8), rgba(15,23,42,0.95));
}
.event-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(153, 27, 27, 0.15);
}
.event-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.event-card .event-info {
  padding: 24px;
}
.event-card .event-tag {
  display: inline-block;
  background: rgba(153, 27, 27, 0.75);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 10px;
}
.event-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.event-card p {
  font-size: 13px;
  color: var(--text);
}

/* ===== Highlights ===== */
.highlights-section {
  background: linear-gradient(160deg, rgba(30,41,59,0.3), rgba(15,23,42,0.9));
}
.hl-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.hl-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  transition: all 0.4s ease;
}
.hl-item:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}
.hl-item img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}
.hl-item .hl-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  background: linear-gradient(transparent, rgba(15,23,42,0.9));
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
}

/* ===== Rankings ===== */
.rankings-section {
  background: var(--bg-dark);
}
.rankings-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.rank-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  background: linear-gradient(145deg, rgba(30,41,59,0.6), rgba(15,23,42,0.8));
  border: 1px solid rgba(100, 116, 139, 0.12);
  border-radius: 10px;
  transition: all 0.3s ease;
}
.rank-item:hover {
  border-color: rgba(153, 27, 27, 0.4);
  background: rgba(30,41,59,0.8);
}
.rank-num {
  font-size: 24px;
  font-weight: 800;
  color: var(--accent);
  width: 48px;
  text-align: center;
}
.rank-info {
  flex: 1;
}
.rank-info h3 {
  font-size: 16px;
}
.rank-info p {
  font-size: 13px;
  color: var(--text);
}
.rank-score {
  font-size: 18px;
  font-weight: 700;
  color: var(--silver);
}

/* ===== Download ===== */
.download-section {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  text-align: center;
}
.download-card {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px;
  background: linear-gradient(145deg, rgba(30,41,59,0.8), rgba(15,23,42,0.95));
  border: 1px solid rgba(100, 116, 139, 0.2);
  border-radius: var(--radius);
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}
.download-card img {
  width: 96px;
  height: 96px;
  margin: 0 auto 20px;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.download-card h2 {
  font-size: 30px;
  margin-bottom: 12px;
}
.download-card p {
  margin-bottom: 28px;
  color: var(--text);
}
.download-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Testimonials ===== */
.testimonials-section {
  background: var(--bg-dark);
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial-card {
  padding: 28px;
  background: linear-gradient(145deg, rgba(30,41,59,0.7), rgba(15,23,42,0.9));
  border: 1px solid rgba(100, 116, 139, 0.15);
  border-radius: var(--radius);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.testimonial-card .stars {
  color: #f59e0b;
  font-size: 18px;
  margin-bottom: 12px;
}
.testimonial-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 16px;
}
.testimonial-card .user {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--silver);
  font-weight: 600;
}

/* ===== News ===== */
.news-section {
  background: linear-gradient(160deg, rgba(30,41,59,0.4), rgba(15,23,42,0.9));
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.news-item {
  background: linear-gradient(145deg, rgba(30,41,59,0.8), rgba(15,23,42,0.95));
  border: 1px solid rgba(100, 116, 139, 0.12);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.4s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.news-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(153, 27, 27, 0.12);
  border-color: rgba(100, 116, 139, 0.3);
}
.news-item .news-tag {
  display: inline-block;
  background: rgba(153, 27, 27, 0.7);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}
.news-item .news-date {
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 6px;
}
.news-item h3 {
  font-size: 17px;
  margin-bottom: 10px;
  line-height: 1.4;
}
.news-item h3 a {
  color: var(--white);
}
.news-item h3 a:hover {
  color: var(--silver);
}
.news-item p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-dark);
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: linear-gradient(145deg, rgba(30,41,59,0.6), rgba(15,23,42,0.8));
  border: 1px solid rgba(100, 116, 139, 0.12);
  border-radius: 12px;
  padding: 24px 28px;
  transition: border-color 0.3s ease;
}
.faq-item:hover {
  border-color: rgba(153, 27, 27, 0.3);
}
.faq-item h3 {
  font-size: 17px;
  color: var(--white);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.faq-item h3 span {
  color: var(--accent);
  font-weight: 800;
}
.faq-item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, rgba(153,27,27,0.15), rgba(15,23,42,0.95));
  text-align: center;
  padding: 80px 24px;
}
.cta-section h2 {
  font-size: 34px;
  margin-bottom: 16px;
}
.cta-section p {
  max-width: 640px;
  margin: 0 auto 32px;
  color: var(--text);
  font-size: 16px;
}

/* ===== Footer ===== */
.site-footer {
  background: #0b1120;
  padding: 48px 24px 24px;
  border-top: 1px solid rgba(100, 116, 139, 0.2);
}
.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 32px;
}
.footer-col h4 {
  color: var(--white);
  font-size: 16px;
  margin-bottom: 14px;
}
.footer-col p, .footer-col a {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
  display: block;
}
.footer-col a:hover {
  color: var(--white);
}
.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(100, 116, 139, 0.1);
  font-size: 14px;
  color: var(--text);
}
.footer-bottom a {
  color: var(--silver);
}
.footer-bottom a:hover {
  color: var(--white);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .story-grid { grid-template-columns: 1fr; }
  .events-grid { grid-template-columns: 1fr; }
  .hl-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-container { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-links { flex-wrap: wrap; gap: 4px; }
  .nav-links a { padding: 6px 10px; font-size: 13px; }
  .hero-content h1 { font-size: 30px; }
  .stats-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .hl-grid { grid-template-columns: 1fr; }
  .download-card { padding: 28px 16px; }
}