:root {
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --primary-light: #38bdf8;
  --accent: #06b6d4;
  --bg-dark: #0c1222;
  --bg-card: #141c2e;
  --bg-card-hover: #1a2540;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: rgba(14, 165, 233, 0.2);
  --gradient: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 50%, #0891b2 100%);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(12, 18, 34, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 1.05rem;
}

.logo-icon { font-size: 1.5rem; }

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.95rem;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover { color: var(--text); background: rgba(14, 165, 233, 0.1); }

.btn-nav {
  background: var(--gradient) !important;
  color: #fff !important;
  font-weight: 500;
}

.btn-nav:hover { opacity: 0.9; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(14, 165, 233, 0.25), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(6, 182, 212, 0.15), transparent),
    linear-gradient(180deg, #0a0f1a 0%, var(--bg-dark) 100%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: 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='%230ea5e9' 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;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 80px 24px;
}

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(14, 165, 233, 0.15);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--primary-light);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--primary-light);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: rgba(14, 165, 233, 0.1);
  border-color: var(--primary);
}

/* Sections */
.section {
  padding: 100px 0;
}

.section-alt {
  background: rgba(20, 28, 46, 0.5);
}

.section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 8px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 48px;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s, background 0.2s;
}

.about-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(14, 165, 233, 0.4);
}

.about-card h3 {
  color: var(--primary-light);
  margin-bottom: 16px;
  font-size: 1.15rem;
}

.about-card p { color: var(--text-muted); margin-bottom: 12px; }
.about-card p:last-child { margin-bottom: 0; }

.about-list {
  list-style: none;
  color: var(--text-muted);
}

.about-list li {
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
}

.about-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--primary);
}

.values { display: flex; flex-direction: column; gap: 16px; }

.value-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.value-icon { font-size: 1.5rem; flex-shrink: 0; }

.value-item strong { display: block; color: var(--text); margin-bottom: 4px; }
.value-item p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

/* Club */
.club-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.club-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.club-features {
  list-style: none;
  margin-top: 24px;
}

.club-features li {
  padding: 10px 0;
  color: var(--text);
  font-size: 1.05rem;
}

.club-stats {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label { color: var(--text-muted); font-size: 0.9rem; }

/* News */
.news-list { display: flex; flex-direction: column; gap: 20px; }

.news-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  transition: border-color 0.2s;
}

.news-item:hover { border-color: rgba(14, 165, 233, 0.4); }

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.news-date { color: var(--text-muted); font-size: 0.9rem; }

.news-tag {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary-light);
  border-radius: 4px;
  font-size: 0.8rem;
}

.news-item h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: var(--text);
}

.news-item p { color: var(--text-muted); font-size: 0.95rem; }

.loading, .empty {
  text-align: center;
  color: var(--text-muted);
  padding: 48px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.contact-icon { font-size: 2rem; display: block; margin-bottom: 12px; }

.contact-card h3 {
  font-size: 0.95rem;
  color: var(--primary-light);
  margin-bottom: 8px;
}

.contact-card p { color: var(--text-muted); font-size: 0.95rem; word-break: break-all; }

.contact-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Feedback Form */
.feedback-intro {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.feedback-form {
  max-width: 640px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.95rem;
  color: var(--text);
}

.required { color: #f87171; }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.form-group textarea { resize: vertical; min-height: 120px; }

.btn-submit {
  width: 100%;
  margin-top: 8px;
  padding: 14px;
  font-size: 1.05rem;
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.form-message {
  text-align: center;
  margin-top: 16px;
  font-size: 0.95rem;
  min-height: 24px;
}

.form-message.success { color: #4ade80; }
.form-message.error { color: #f87171; }

/* Footer */
.footer {
  background: #080c14;
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

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

.footer-company {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.footer-club {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-links a:hover { color: var(--primary-light); }

.footer-legal p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.footer-legal a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-legal a:hover { color: var(--primary-light); }

.icp-line .sep { margin: 0 8px; opacity: 0.5; }

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(12, 18, 34, 0.98);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s, opacity 0.3s, visibility 0.3s;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a { width: 100%; text-align: center; }

  .club-content { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
}