/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #0a0e1a;
  color: #f1f5f9;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
.tabular-nums { font-variant-numeric: tabular-nums; }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #0a0e1a; }
::-webkit-scrollbar-thumb { background: rgba(6,182,212,0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(6,182,212,0.5); }

/* ===== Navbar ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: all 0.3s;
}
.navbar.scrolled {
  background: rgba(10,14,26,0.8);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(6,182,212,0.1);
  box-shadow: 0 4px 24px rgba(6,182,212,0.05);
}
.navbar-inner {
  max-width: 80rem; margin: 0 auto; padding: 0 1.5rem;
  display: flex; align-items: center; justify-content: space-between; height: 4rem;
}
@media (min-width: 1024px) { .navbar-inner { padding: 0 2rem; } }
.navbar-logo { display: flex; align-items: center; }
.navbar-logo img { height: 2.75rem; width: auto; }
.navbar-links { display: none; align-items: center; gap: 2rem; }
@media (min-width: 768px) { .navbar-links { display: flex; } }
.navbar-links a { font-size: 0.875rem; color: #94a3b8; transition: color 0.2s; }
.navbar-links a:hover { color: #22d3ee; }
.btn-register {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border-radius: 0.5rem; background: #06b6d4;
  padding: 0.5rem 1rem; font-size: 0.875rem; font-weight: 500; color: #0a0e1a;
  transition: all 0.2s;
}
.btn-register:hover { background: #22d3ee; box-shadow: 0 4px 16px rgba(6,182,212,0.25); }
.btn-register-mobile {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border-radius: 0.5rem; background: #06b6d4;
  padding: 0.375rem 0.75rem; font-size: 0.75rem; font-weight: 500; color: #0a0e1a;
}
@media (min-width: 768px) { .btn-register-mobile { display: none; } }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, #0a0e1a, #0c1425, #0a0e1a);
}
.hero canvas {
  position: absolute; inset: 0; pointer-events: none; opacity: 0.6;
}
.hero-glow1 {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 800px; height: 800px; background: rgba(6,182,212,0.05); border-radius: 50%; filter: blur(64px);
}
.hero-glow2 {
  position: absolute; top: 33%; left: 25%; width: 400px; height: 400px; background: rgba(139,92,246,0.05); border-radius: 50%; filter: blur(64px);
}
.hero-content {
  position: relative; z-index: 10; max-width: 64rem; margin: 0 auto; padding: 0 1.5rem; text-align: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border-radius: 9999px; border: 1px solid rgba(6,182,212,0.2); background: rgba(6,182,212,0.05);
  padding: 0.375rem 1rem; margin-bottom: 2rem;
}
.hero-badge-dot {
  width: 0.5rem; height: 0.5rem; border-radius: 50%; background: #22d3ee;
  animation: pulse 2s cubic-bezier(0.4,0,0.6,1) infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
.hero-badge span { font-size: 0.75rem; font-weight: 500; color: #22d3ee; letter-spacing: 0.05em; }
.hero h1 {
  font-size: 1.875rem; font-weight: 700; letter-spacing: -0.025em; line-height: 1.15; margin-bottom: 1rem;
}
@media (min-width: 640px) { .hero h1 { font-size: 2.25rem; } }
@media (min-width: 768px) { .hero h1 { font-size: 3rem; } }
@media (min-width: 1024px) { .hero h1 { font-size: 3.75rem; } }
.hero h1 .gradient-text {
  background: linear-gradient(to right, #22d3ee, #67e8f9); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero h2 {
  font-size: 1.25rem; font-weight: 700; letter-spacing: -0.025em; line-height: 1.2; margin-bottom: 1.5rem; color: #f1f5f9;
}
@media (min-width: 640px) { .hero h2 { font-size: 1.5rem; } }
@media (min-width: 768px) { .hero h2 { font-size: 1.875rem; } }
@media (min-width: 1024px) { .hero h2 { font-size: 2.25rem; } }
.hero-tagline {
  font-size: 0.75rem; letter-spacing: 0.3em; color: rgba(6,182,212,0.7); text-transform: uppercase; font-weight: 500; margin-bottom: 2.5rem;
}
@media (min-width: 640px) { .hero-tagline { font-size: 0.875rem; } }
.hero-info {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 1.5rem; margin-bottom: 3rem;
}
.hero-info-item { display: flex; align-items: center; gap: 0.5rem; color: #94a3b8; }
.hero-info-item svg { width: 1.25rem; height: 1.25rem; color: rgba(6,182,212,0.6); flex-shrink: 0; }
.hero-info-item span { font-size: 0.875rem; }
.btn-hero {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border-radius: 0.75rem; background: #06b6d4;
  padding: 0.875rem 2rem; font-size: 1rem; font-weight: 600; color: #0a0e1a;
  transition: all 0.2s;
}
.btn-hero:hover { background: #22d3ee; box-shadow: 0 8px 24px rgba(6,182,212,0.25); transform: scale(1.02); }
.btn-hero:active { transform: scale(0.98); }
.btn-hero svg { width: 1rem; height: 1rem; }
.hero-pills {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 0.75rem; margin-top: 3rem;
}
.hero-pill {
  display: inline-flex; align-items: center; gap: 0.375rem;
  border-radius: 0.5rem; border: 1px solid rgba(51,65,85,0.5); background: rgba(30,41,59,0.5);
  padding: 0.375rem 0.75rem; font-size: 0.75rem; font-weight: 500; color: #cbd5e1;
}
.hero-pill-dot { width: 0.375rem; height: 0.375rem; border-radius: 50%; background: #22d3ee; }
.hero-fade {
  position: absolute; bottom: 0; left: 0; right: 0; height: 8rem;
  background: linear-gradient(to top, #0a0e1a, transparent);
}

/* ===== Section common ===== */
.section { position: relative; padding: 6rem 0; }
@media (min-width: 640px) { .section { padding: 8rem 0; } }
.section-container { max-width: 80rem; margin: 0 auto; padding: 0 1.5rem; }
@media (min-width: 1024px) { .section-container { padding: 0 2rem; } }
.section-divider {
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 50%; height: 1px;
  background: linear-gradient(to right, transparent, rgba(6,182,212,0.2), transparent);
}
.section-divider-violet {
  background: linear-gradient(to right, transparent, rgba(139,92,246,0.2), transparent);
}
.section-label {
  display: inline-block; font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: rgba(6,182,212,0.7); margin-bottom: 1rem;
}
.section-label-violet { color: rgba(139,92,246,0.7); }
.section-title {
  font-size: 1.875rem; font-weight: 700; letter-spacing: -0.025em; color: #f1f5f9;
}
@media (min-width: 640px) { .section-title { font-size: 2.25rem; } }
.section-header { text-align: center; margin-bottom: 4rem; }

/* ===== Why Section ===== */
.why-grid {
  display: grid; grid-template-columns: 1fr; gap: 4rem; align-items: start;
}
@media (min-width: 1024px) { .why-grid { grid-template-columns: 1fr 1fr; } }
.why-title-gradient {
  background: linear-gradient(to right, #22d3ee, #8b5cf6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.why-desc { color: #94a3b8; line-height: 1.625; }
.why-desc .highlight { color: #22d3ee; font-weight: 500; }
.why-desc .highlight-white { color: #e2e8f0; font-weight: 500; }
.why-callout {
  border-radius: 0.75rem; border: 1px solid rgba(6,182,212,0.1);
  background: rgba(6,182,212,0.05); padding: 1rem;
}
.why-callout p { font-size: 0.875rem; color: rgba(103,232,249,0.9); line-height: 1.625; }

/* ===== Cards ===== */
.card {
  position: relative; border-radius: 0.75rem;
  border: 1px solid rgba(51,65,85,0.5); background: rgba(30,41,59,0.3);
  transition: all 0.3s;
}
.card:hover { border-color: rgba(6,182,212,0.3); background: rgba(30,41,59,0.5); }
.card-glow {
  position: absolute; inset: 0; border-radius: 0.75rem;
  background: linear-gradient(to bottom, rgba(6,182,212,0.05), transparent);
  opacity: 0; transition: opacity 0.3s; pointer-events: none;
}
.card:hover .card-glow { opacity: 1; }
.card-lift:hover { transform: translateY(-4px); }
.card-violet:hover { border-color: rgba(139,92,246,0.3); }
.card-violet .card-glow { background: linear-gradient(to bottom, rgba(139,92,246,0.05), transparent); }

/* Goals grid */
.goals-grid {
  display: grid; grid-template-columns: 1fr; gap: 1.5rem;
}
@media (min-width: 640px) { .goals-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .goals-grid { grid-template-columns: repeat(4,1fr); } }
.goal-icon {
  display: flex; align-items: center; justify-content: center;
  width: 2.75rem; height: 2.75rem; border-radius: 0.5rem;
  background: rgba(6,182,212,0.1); color: #22d3ee; margin-bottom: 1.25rem;
  transition: background 0.2s;
}
.card:hover .goal-icon { background: rgba(6,182,212,0.2); }
.goal-icon svg { width: 1.5rem; height: 1.5rem; }

/* Who grid */
.who-grid {
  display: grid; grid-template-columns: 1fr; gap: 1.5rem;
}
@media (min-width: 768px) { .who-grid { grid-template-columns: repeat(3,1fr); } }
.who-tag {
  display: inline-flex; align-items: center; gap: 0.375rem;
  border-radius: 0.375rem; background: rgba(139,92,246,0.1);
  padding: 0.25rem 0.625rem; font-size: 0.75rem; font-weight: 500; color: #a78bfa; margin-bottom: 1.25rem;
}
.who-icon {
  display: flex; align-items: center; justify-content: center;
  width: 3.5rem; height: 3.5rem; border-radius: 0.75rem;
  background: rgba(51,65,85,0.5); color: #cbd5e1; margin-bottom: 1.25rem;
}
.who-icon svg { width: 1.75rem; height: 1.75rem; }

/* Benefits grid */
.benefits-grid {
  display: grid; grid-template-columns: 1fr; gap: 1.5rem;
}
@media (min-width: 640px) { .benefits-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .benefits-grid { grid-template-columns: repeat(3,1fr); } }
.benefit-num {
  font-size: 1.875rem; font-weight: 700; font-variant-numeric: tabular-nums;
  transition: color 0.2s;
}
.benefit-num.cyan { color: rgba(6,182,212,0.2); }
.card:hover .benefit-num.cyan { color: rgba(6,182,212,0.3); }
.benefit-num.emerald { color: rgba(16,185,129,0.2); }
.card:hover .benefit-num.emerald { color: rgba(16,185,129,0.3); }
.benefit-num.violet { color: rgba(139,92,246,0.2); }
.card:hover .benefit-num.violet { color: rgba(139,92,246,0.3); }

/* ===== Agenda ===== */
.agenda-container { max-width: 64rem; margin: 0 auto; padding: 0 1.5rem; }
@media (min-width: 1024px) { .agenda-container { padding: 0 2rem; } }
.agenda-timeline { position: relative; }
.agenda-line {
  position: absolute; left: 7.5rem; top: 1.5rem; bottom: 0; width: 1px;
  background: linear-gradient(to bottom, rgba(6,182,212,0.3), rgba(6,182,212,0.1), transparent);
}
@media (max-width: 639px) { .agenda-line { display: none; } }
.agenda-item { position: relative; }
.agenda-dot-wrap {
  position: absolute; left: 7.5rem; top: 1.1rem; transform: translateX(-50%); z-index: 10;
  display: none;
}
@media (min-width: 640px) { .agenda-dot-wrap { display: flex; } }
.agenda-dot {
  width: 0.625rem; height: 0.625rem; border-radius: 50%; border: 2px solid; transition: border-color 0.2s;
}
.agenda-dot.break { border-color: #475569; background: #334155; }
.agenda-item:hover .agenda-dot.break { border-color: #64748b; }
.agenda-dot.session { border-color: rgba(6,182,212,0.5); background: #0a0e1a; }
.agenda-item:hover .agenda-dot.session { border-color: #22d3ee; }
.agenda-row {
  display: flex; flex-direction: column; gap: 1rem; padding: 1rem; margin: 0 -1rem; border-radius: 0.5rem; transition: background 0.2s;
}
@media (min-width: 640px) {
  .agenda-row { flex-direction: row; align-items: flex-start; gap: 2rem; }
}
.agenda-row.break-row:hover { background: rgba(30,41,59,0.2); }
.agenda-row.session-row:hover { background: rgba(30,41,59,0.4); }
.agenda-time { flex-shrink: 0; width: 7rem; }
.agenda-time span { font-size: 0.875rem; font-variant-numeric: tabular-nums; }
.agenda-time.break-time span { color: #64748b; }
.agenda-time.session-time span { color: rgba(34,211,238,0.8); }
.agenda-content { flex: 1; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.agenda-title { font-size: 0.875rem; }
.agenda-title.break-title { color: #64748b; }
.agenda-title.session-title { color: #e2e8f0; font-weight: 500; }
.agenda-speaker {
  flex-shrink: 0; border-radius: 0.375rem; background: rgba(51,65,85,0.5);
  padding: 0.125rem 0.625rem; font-size: 0.75rem; color: #94a3b8;
}
.agenda-gift {
  flex-shrink: 0; border-radius: 0.375rem; background: rgba(16,185,129,0.1);
  padding: 0.125rem 0.625rem; font-size: 0.75rem; color: #34d399;
}

/* ===== Registration ===== */
.register-container { max-width: 56rem; margin: 0 auto; padding: 0 1.5rem; }
@media (min-width: 1024px) { .register-container { padding: 0 2rem; } }
.register-card {
  border-radius: 1rem; border: 1px solid rgba(51,65,85,0.5);
  background: rgba(30,41,59,0.3); overflow: hidden;
}
.register-bar { height: 4px; background: linear-gradient(to right, #06b6d4, #8b5cf6, #06b6d4); }
.register-inner { padding: 2rem; }
@media (min-width: 640px) { .register-inner { padding: 3rem; } }
.register-details {
  display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin-bottom: 2.5rem;
}
@media (min-width: 640px) { .register-details { grid-template-columns: repeat(3,1fr); } }
.register-detail-card {
  border-radius: 0.75rem; border: 1px solid rgba(51,65,85,0.4);
  background: rgba(30,41,59,0.4); padding: 1.25rem; text-align: center;
}
.register-detail-icon { display: flex; justify-content: center; margin-bottom: 0.75rem; }
.register-detail-icon svg { width: 1.5rem; height: 1.5rem; color: rgba(34,211,238,0.6); }
.register-detail-label { font-size: 0.75rem; color: #64748b; margin-bottom: 0.25rem; }
.register-detail-value { font-size: 0.875rem; font-weight: 500; color: #e2e8f0; font-variant-numeric: tabular-nums; }
.register-detail-sub { font-size: 0.75rem; color: #64748b; }
.btn-register-main {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border-radius: 0.75rem; background: #06b6d4;
  padding: 1rem 2.5rem; font-size: 1rem; font-weight: 600; color: #0a0e1a;
  transition: all 0.2s;
}
.btn-register-main:hover { background: #22d3ee; box-shadow: 0 8px 24px rgba(6,182,212,0.25); transform: scale(1.02); }
.btn-register-main:active { transform: scale(0.98); }
.btn-register-main svg { width: 1rem; height: 1rem; }

/* ===== Footer ===== */
.footer {
  position: relative; border-top: 1px solid rgba(30,41,59,0.5); padding: 3rem 0;
}
.footer-inner {
  max-width: 80rem; margin: 0 auto; padding: 0 1.5rem;
  display: flex; flex-direction: column; align-items: center; justify-content: space-between; gap: 1rem;
}
@media (min-width: 640px) {
  .footer-inner { flex-direction: row; }
  .footer-inner { padding: 0 2rem; }
}
.footer-logo { display: flex; align-items: center; }
.footer-logo img { height: 2.25rem; width: auto; }
.footer-copy { font-size: 0.75rem; color: #475569; }

/* ===== Animations ===== */
.fade-in-up {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in-up.visible {
  opacity: 1; transform: translateY(0);
}

/* ===== Card inner spacing ===== */
.card-p6 { padding: 1.5rem; }
.card-p8 { padding: 2rem; }