/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent: #7c3aed;
  --accent2: #4f46e5;
  --accent3: #06b6d4;
  --bg-dark: #0b0c1a;
  --bg-card: #13142a;
  --bg-light: #f5f4ff;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, #7c3aed 0%, #4f46e5 50%, #06b6d4 100%);
  --gradient-dark: linear-gradient(135deg, #0b0c1a 0%, #13142a 100%);
  --radius: 16px;
  --shadow: 0 8px 32px rgba(124, 58, 237, 0.18);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  background: rgba(11, 12, 26, 0.97);
  padding: 12px 0;
  box-shadow: 0 4px 30px rgba(0,0,0,0.5);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-size: 1.9rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  transition: color var(--transition);
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--gradient);
  border-radius: 2px;
  transition: width var(--transition);
}

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

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.burger span {
  display: block;
  width: 26px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.burger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 140px 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-dark);
  z-index: 0;
}

.hero-bg::before {
  content: '';
  position: absolute;
  width: 700px; height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,0.22) 0%, transparent 70%);
  top: -200px; right: -200px;
  animation: pulse 6s ease-in-out infinite alternate;
}

.hero-bg::after {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6,182,212,0.15) 0%, transparent 70%);
  bottom: -100px; left: -100px;
  animation: pulse 8s ease-in-out infinite alternate-reverse;
}

@keyframes pulse {
  from { transform: scale(1); opacity: 0.7; }
  to { transform: scale(1.15); opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff 0%, #c4b5fd 60%, #67e8f9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 560px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient);
  color: var(--white);
  font-weight: 700;
  font-size: 1rem;
  padding: 16px 40px;
  border-radius: 50px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(124,58,237,0.4);
  filter: brightness(1.1);
}

/* ===== SECTIONS ===== */
.section { padding: 100px 0; }
.section-dark { background: var(--bg-card); }

h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.25;
}

h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--white);
}

.section-sub {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 56px;
  max-width: 600px;
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 1rem;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.stat-card {
  background: rgba(124,58,237,0.12);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: var(--radius);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== STEPS ===== */
.steps { display: flex; flex-direction: column; gap: 32px; }

.step {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.step:hover {
  border-color: rgba(124,58,237,0.4);
  box-shadow: var(--shadow);
}

.step-num {
  font-size: 2.8rem;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  flex-shrink: 0;
  min-width: 60px;
}

.step-body p { color: var(--text-muted); font-size: 0.97rem; }

/* ===== FEATURES ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(124,58,237,0.45);
  box-shadow: var(--shadow);
}

.feature-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.feature-card p { color: var(--text-muted); font-size: 0.93rem; }

/* ===== SAFETY ===== */
.safety-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: start;
}

.safety-text p {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 0.97rem;
}

.tips {
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: var(--radius);
  padding: 28px;
  margin-top: 24px;
}

.tips h3 { margin-bottom: 14px; }

.tips ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tips ul li {
  color: var(--text-muted);
  font-size: 0.93rem;
  padding-left: 20px;
  position: relative;
}

.tips ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent3);
  font-weight: 700;
}

.shield-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding-top: 24px;
}

.shield {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 28px 16px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.shield:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow);
}

.shield span { font-size: 2rem; display: block; margin-bottom: 10px; }
.shield p { color: var(--text-muted); font-size: 0.85rem; font-weight: 600; }

/* ===== TIMELINE ===== */
.timeline { position: relative; padding-left: 40px; }

.timeline::before {
  content: '';
  position: absolute;
  left: 14px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent3));
  border-radius: 2px;
}

.tl-item {
  position: relative;
  margin-bottom: 48px;
}

.tl-item:last-child { margin-bottom: 0; }

.tl-dot {
  position: absolute;
  left: -34px;
  top: 6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--gradient);
  box-shadow: 0 0 12px rgba(124,58,237,0.6);
}

.tl-content {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.tl-content:hover {
  border-color: rgba(124,58,237,0.35);
  box-shadow: var(--shadow);
}

.tl-content h3 { margin-bottom: 10px; }
.tl-content p { color: var(--text-muted); font-size: 0.96rem; }

/* ===== FAQ ===== */
.faq-list { display: flex; flex-direction: column; gap: 14px; max-width: 860px; }

.faq-item {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item.open { border-color: rgba(124,58,237,0.45); }

.faq-q {
  width: 100%;
  background: rgba(255,255,255,0.03);
  border: none;
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  padding: 22px 28px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: background var(--transition);
}

.faq-q::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--accent3);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-q:hover { background: rgba(124,58,237,0.1); }

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1), padding var(--transition);
}

.faq-item.open .faq-a { max-height: 400px; }

.faq-a p {
  color: var(--text-muted);
  padding: 0 28px 24px;
  font-size: 0.96rem;
}

/* ===== FOOTER ===== */
.site-footer {
  background: #07080f;
  padding: 72px 0 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 2fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
}

.footer-logo {
  font-size: 1.7rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.footer-col p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul { display: flex; flex-direction: column; gap: 10px; }

.footer-col ul li a,
.footer-col ul li {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 0;
  text-align: center;
}

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

/* ===== SCROLL REVEAL ===== */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .safety-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 768px) {
  .burger { display: flex; }

  .nav {
    position: fixed;
    top: 0; right: -100%;
    width: min(320px, 80vw);
    height: 100vh;
    background: #0d0e22;
    flex-direction: column;
    padding: 100px 32px 40px;
    gap: 24px;
    border-left: 1px solid rgba(255,255,255,0.08);
    transition: right var(--transition);
    z-index: 999;
  }

  .nav.open { right: 0; }
  .nav a { font-size: 1.1rem; }

  .hero { padding: 120px 0 60px; }
  .section { padding: 72px 0; }

  .about-stats { grid-template-columns: 1fr 1fr; }

  .step { flex-direction: column; gap: 16px; }
  .step-num { font-size: 2rem; }

  .features-grid { grid-template-columns: 1fr; }

  .shield-wrap { grid-template-columns: 1fr 1fr; }

  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 480px) {
  .about-stats { grid-template-columns: 1fr; }
  .shield-wrap { grid-template-columns: 1fr 1fr; }
  .timeline { padding-left: 28px; }
  .tl-dot { left: -22px; }
  .tl-content { padding: 20px; }
}