/* ==========================================================================
   dingfengtrad.com - Main Stylesheet
   Tesla-inspired futuristic engineering aesthetic
   ========================================================================== */

:root {
  --color-bg: #000000;
  --color-bg-2: #0a0a0a;
  --color-bg-3: #111111;
  --color-bg-4: #1a1a1a;
  --color-surface: rgba(255, 255, 255, 0.04);
  --color-surface-hover: rgba(255, 255, 255, 0.08);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.16);
  --color-text: #ffffff;
  --color-text-2: #b3b3b3;
  --color-text-3: #808080;
  --color-accent: #00d4ff;
  --color-accent-2: #7c3aed;
  --color-accent-3: #00ffa3;
  --color-danger: #ff3a5e;
  --color-warning: #ffb800;
  --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
  --gradient-secondary: linear-gradient(135deg, #00ffa3 0%, #00d4ff 100%);
  --gradient-dark: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,1) 100%);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.35);
  --shadow-glow-purple: 0 0 40px rgba(124, 58, 237, 0.45);
  --shadow-card: 0 10px 40px rgba(0,0,0,0.4);
  --shadow-soft: 0 2px 16px rgba(0,0,0,0.18);
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --container: 1280px;
  --header-h: 76px;
  --font-display: 'Space Grotesk', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', Consolas, monospace;
}

/* ----- Reset & Base ----- */
* { box-sizing: border-box; margin: 0; padding: 0; }
*:before, *:after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

img, svg, video { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; transition: var(--transition-fast); }

button { background: transparent; border: none; color: inherit; font-family: inherit; cursor: pointer; }

ul, ol { list-style: none; }

::selection { background: var(--color-accent); color: #000; }

/* Custom scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-bg-2); }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-2) 100%); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-accent); }

/* ----- Typography ----- */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 700; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
p { color: var(--color-text-2); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
  position: relative;
  padding-left: 32px;
}
.eyebrow::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  width: 22px; height: 1px;
  background: var(--color-accent);
  transform: translateY(-50%);
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-green {
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.mono { font-family: var(--font-mono); }

/* ----- Layout ----- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-wide { width: 100%; max-width: 1480px; margin: 0 auto; padding: 0 24px; }
.container-narrow { width: 100%; max-width: 880px; margin: 0 auto; padding: 0 24px; }

section { position: relative; padding: 120px 0; }
.section-sm { padding: 80px 0; }
.section-lg { padding: 160px 0; }

.divider {
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-strong), transparent);
  margin: 0;
}

/* ----- HEADER / NAV ----- */
.site-header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
  backdrop-filter: blur(0px);
  background: transparent;
}
.site-header.scrolled {
  backdrop-filter: blur(20px) saturate(180%);
  background: rgba(0, 0, 0, 0.72);
  border-bottom: 1px solid var(--color-border);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand-logo { width: 36px; height: 36px; }
.brand-name { color: #fff; }
.brand-tag { font-family: var(--font-mono); font-size: 0.7rem; color: var(--color-text-3); font-weight: 400; letter-spacing: 0.1em; text-transform: uppercase; }

.primary-nav { display: flex; gap: 4px; align-items: center; }
.primary-nav a {
  font-size: 0.95rem;
  color: var(--color-text-2);
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 500;
  position: relative;
}
.primary-nav a:hover, .primary-nav a.active {
  color: #fff;
  background: rgba(255,255,255,0.06);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  background: #fff;
  color: #000;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(255,255,255,0.25); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 12px; right: 12px;
  height: 2px;
  background: #fff;
  border-radius: 1px;
  transition: var(--transition);
}
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 26px; }
.nav-toggle.open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ----- BUTTONS ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn .ico { width: 18px; height: 18px; transition: var(--transition); }

.btn-primary { background: #fff; color: #000; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(255,255,255,0.18); }

.btn-secondary { background: rgba(255,255,255,0.06); color: #fff; border-color: var(--color-border-strong); backdrop-filter: blur(10px); }
.btn-secondary:hover { background: rgba(255,255,255,0.12); transform: translateY(-2px); }

.btn-ghost { background: transparent; color: #fff; border-color: var(--color-border-strong); }
.btn-ghost:hover { background: rgba(255,255,255,0.06); transform: translateY(-2px); }

.btn-accent { background: var(--gradient-primary); color: #fff; }
.btn-accent:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }

.btn-arrow .ico { transition: var(--transition); }
.btn-arrow:hover .ico { transform: translateX(4px); }

/* ----- CARDS ----- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.08), transparent 50%);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}
.card:hover { border-color: var(--color-border-strong); transform: translateY(-6px); }
.card:hover::before { opacity: 1; }

.card-glow { position: relative; }
.card-glow::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  background: var(--gradient-primary);
  z-index: -1;
  opacity: 0;
  filter: blur(20px);
  transition: var(--transition);
}
.card-glow:hover::after { opacity: 0.6; }

/* ----- HERO ----- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 80px;
}

.hero-bg {
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 0;
}
.hero-bg svg { width: 100%; height: 100%; opacity: 0.4; }

.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

.hero-orb {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.35) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}
.hero-orb.one { top: -200px; right: -100px; animation: float 20s ease-in-out infinite; }
.hero-orb.two { bottom: -200px; left: -100px; background: radial-gradient(circle, rgba(124,58,237,0.3) 0%, transparent 70%); animation: float 25s ease-in-out infinite reverse; }

@keyframes float {
  0%, 100% { transform: translate(0,0) scale(1); }
  33% { transform: translate(40px,-40px) scale(1.1); }
  66% { transform: translate(-30px,30px) scale(0.95); }
}

.hero-inner { position: relative; z-index: 2; width: 100%; }

.hero-pretitle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.25);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-bottom: 28px;
}
.hero-pretitle .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 12px var(--color-accent); animation: pulse 2s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero h1 {
  font-size: clamp(3rem, 7.5vw, 6.5rem);
  margin-bottom: 28px;
  letter-spacing: -0.04em;
  line-height: 1.02;
}

.hero-sub {
  max-width: 720px;
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  color: var(--color-text-2);
  margin-bottom: 40px;
  line-height: 1.65;
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 40px 0;
  margin-top: 80px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
}
.stat-label { font-family: var(--font-mono); font-size: 0.85rem; color: var(--color-text-3); text-transform: uppercase; letter-spacing: 0.1em; }

/* ----- MARQUEE ----- */
.marquee {
  overflow: hidden;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 28px 0;
  background: var(--color-bg-2);
}
.marquee-track {
  display: flex;
  gap: 60px;
  animation: scroll-x 40s linear infinite;
  white-space: nowrap;
  width: max-content;
}
.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text-3);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}
.marquee-item .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--color-accent); }
@keyframes scroll-x { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ----- SECTION HEADER ----- */
.section-head {
  margin-bottom: 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: end;
}
.section-head.center {
  grid-template-columns: 1fr;
  text-align: center;
  justify-items: center;
}
.section-head p { max-width: 560px; }
.section-head.center .eyebrow { padding-left: 0; }
.section-head.center .eyebrow::before { display: none; }

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

.feature {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature:hover { transform: translateY(-6px); border-color: var(--color-border-strong); background: var(--color-surface-hover); }

.feature-icon {
  width: 60px; height: 60px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(124,58,237,0.12));
  border: 1px solid var(--color-border-strong);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px;
  transition: var(--transition);
}
.feature-icon svg { width: 30px; height: 30px; color: var(--color-accent); }
.feature:hover .feature-icon { transform: scale(1.08) rotate(-4deg); }

.feature h3 { font-size: 1.375rem; margin-bottom: 12px; }
.feature p { font-size: 0.95rem; }

.feature-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-3);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  margin-bottom: 16px;
}

/* ----- APP CARDS ----- */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.app-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}
.app-card:hover { transform: translateY(-8px); border-color: var(--color-accent); box-shadow: 0 20px 60px rgba(0,212,255,0.15); }

.app-visual {
  height: 200px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg-3), var(--color-bg-2));
}
.app-visual svg { width: 100%; height: 100%; }

.app-body { padding: 28px; }
.app-cat {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.app-card h3 { font-size: 1.3rem; margin-bottom: 10px; }
.app-card p { font-size: 0.92rem; margin-bottom: 18px; }
.app-meta {
  display: flex;
  gap: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-3);
}
.app-meta span { display: inline-flex; align-items: center; gap: 6px; }

/* ----- PROCESS ----- */
.process-list {
  display: grid;
  gap: 0;
}
.process-row {
  display: grid;
  grid-template-columns: 100px 1fr 1fr 80px;
  gap: 40px;
  padding: 36px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: start;
  position: relative;
  transition: var(--transition);
}
.process-row:hover { padding-left: 16px; }
.process-row:first-child { border-top: 1px solid var(--color-border); }
.process-row .num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--color-accent);
  font-weight: 500;
}
.process-row h3 { font-size: 1.5rem; margin-bottom: 12px; }
.process-row p { font-size: 0.95rem; }
.process-row .arrow {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--color-text-3);
  text-align: right;
  transition: var(--transition);
}
.process-row:hover .arrow { color: var(--color-accent); transform: translateX(8px); }

/* ----- TIMELINE ----- */
.timeline { position: relative; padding: 20px 0; }
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--color-border-strong), transparent);
  transform: translateX(-50%);
}
.timeline-item {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  margin-bottom: 60px;
  align-items: stretch;
}
.timeline-item .node {
  grid-column: 2;
  display: flex; justify-content: center;
  position: relative;
}
.timeline-item .node::before {
  content: '';
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  margin-top: 24px;
  box-shadow: 0 0 0 6px rgba(0,212,255,0.12), 0 0 20px rgba(0,212,255,0.3);
  position: relative;
  z-index: 2;
}
.timeline-item .card {
  grid-column: 1;
  margin-right: 30px;
}
.timeline-item.right .card {
  grid-column: 3;
  margin-right: 0; margin-left: 30px;
}
.timeline-item .date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

/* ----- CONTACT ----- */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}
.contact-info { display: grid; gap: 24px; }
.contact-card {
  display: flex;
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: var(--transition);
}
.contact-card:hover { border-color: var(--color-accent); transform: translateX(6px); }
.contact-card .icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(124,58,237,0.12));
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-card .icon svg { width: 22px; height: 22px; color: var(--color-accent); }
.contact-card .label { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-text-3); margin-bottom: 6px; }
.contact-card .value { color: #fff; font-weight: 500; word-break: break-word; }
.contact-card a.value:hover { color: var(--color-accent); }

/* ----- FORM ----- */
.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(20px);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-text-3); margin-bottom: 10px; }
.form-control {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}
.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  background: rgba(0,212,255,0.04);
  box-shadow: 0 0 0 4px rgba(0,212,255,0.1);
}
textarea.form-control { resize: vertical; min-height: 140px; font-family: var(--font-body); }

.form-success {
  display: none;
  padding: 16px 20px;
  background: rgba(0,255,163,0.08);
  border: 1px solid rgba(0,255,163,0.3);
  border-radius: 10px;
  color: var(--color-accent-3);
  margin-bottom: 20px;
  font-size: 0.9rem;
}
.form-success.show { display: block; animation: fadeUp 0.4s ease-out; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ----- LEGAL (Privacy/Terms) ----- */
.legal-wrap {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 60px;
  padding-top: 60px;
}
.legal-toc {
  position: sticky;
  top: calc(var(--header-h) + 40px);
  height: max-content;
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.legal-toc h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}
.legal-toc ol { counter-reset: toc; list-style: none; }
.legal-toc li {
  counter-increment: toc;
  margin-bottom: 8px;
}
.legal-toc a {
  display: block;
  padding: 6px 10px 6px 32px;
  font-size: 0.82rem;
  color: var(--color-text-2);
  border-radius: 6px;
  position: relative;
  line-height: 1.45;
  transition: var(--transition-fast);
}
.legal-toc a::before {
  content: counter(toc, decimal-leading-zero);
  position: absolute;
  left: 6px;
  top: 6px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-3);
}
.legal-toc a:hover { background: rgba(255,255,255,0.04); color: #fff; }

.legal-body { max-width: 100%; }
.legal-body section { padding: 0 0 40px; }
.legal-body h2 {
  font-size: 1.75rem;
  margin: 50px 0 20px;
  padding-top: 30px;
  border-top: 1px solid var(--color-border);
  scroll-margin-top: calc(var(--header-h) + 20px);
}
.legal-body h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.legal-body h3 { font-size: 1.25rem; margin: 30px 0 14px; color: #fff; }
.legal-body p, .legal-body li { color: var(--color-text-2); margin-bottom: 14px; font-size: 0.95rem; line-height: 1.75; }
.legal-body ul, .legal-body ol { margin: 14px 0 14px 24px; }
.legal-body ul li, .legal-body ol li { margin-bottom: 8px; }
.legal-body ul li { list-style: disc; }
.legal-body ol li { list-style: decimal; }
.legal-body strong { color: #fff; font-weight: 600; }
.legal-body a { color: var(--color-accent); border-bottom: 1px dashed var(--color-accent); }
.legal-body a:hover { background: var(--color-accent); color: #000; border-bottom-color: transparent; }
.legal-body code { font-family: var(--font-mono); font-size: 0.85em; padding: 2px 6px; background: rgba(255,255,255,0.06); border-radius: 4px; color: var(--color-accent); }
.legal-body .meta-block {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin: 24px 0;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}
.legal-body .meta-block div { font-size: 0.85rem; }
.legal-body .meta-block strong { display: block; color: var(--color-accent); font-family: var(--font-mono); text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.15em; margin-bottom: 6px; }
.legal-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}
.legal-body table th, .legal-body table td {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  text-align: left;
}
.legal-body table th {
  background: var(--color-bg-3);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

/* ----- FOOTER ----- */
.site-footer {
  position: relative;
  padding: 80px 0 40px;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-2);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}
.footer-brand p { margin: 20px 0; max-width: 320px; font-size: 0.9rem; }

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: #fff;
  margin-bottom: 22px;
}
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a {
  color: var(--color-text-2);
  font-size: 0.9rem;
  transition: var(--transition-fast);
}
.footer-col ul a:hover { color: var(--color-accent); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 30px;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-3);
  flex-wrap: wrap;
  gap: 12px;
}

/* ----- BACK TO TOP ----- */
.back-top {
  position: fixed;
  bottom: 24px; right: 24px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  box-shadow: var(--shadow-glow);
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { transform: translateY(-4px); }
.back-top svg { width: 20px; height: 20px; }

/* ----- ANIMATIONS ----- */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease-out, transform 0.9s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

.fade-in { animation: fadeIn 1s ease-out; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ----- RESPONSIVE ----- */
@media (max-width: 1024px) {
  .section-head { grid-template-columns: 1fr; gap: 16px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .legal-wrap { grid-template-columns: 1fr; }
  .legal-toc { position: static; margin-bottom: 30px; }
  .process-row { grid-template-columns: 60px 1fr 50px; gap: 20px; }
  .process-row > p { grid-column: 2; grid-row: 2; }
}

@media (max-width: 768px) {
  section { padding: 80px 0; }
  .section-lg { padding: 100px 0; }
  .primary-nav, .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .primary-nav.open {
    display: flex;
    flex-direction: column;
    gap: 6px;
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    padding: 24px;
    background: rgba(0,0,0,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
  }
  .primary-nav.open a { padding: 14px 18px; font-size: 1.1rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 24px; padding: 24px 0; }
  .contact-wrap { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .timeline::before { left: 24px; }
  .timeline-item { grid-template-columns: 50px 1fr; }
  .timeline-item .card,
  .timeline-item.right .card { grid-column: 2; margin: 0 0 0 16px; }
  .timeline-item .node { grid-column: 1; }
  .hero-actions .btn { width: 100%; }
  .legal-body table { font-size: 0.78rem; }
  .legal-body table th, .legal-body table td { padding: 8px; }
}

@media (max-width: 480px) {
  .container, .container-wide, .container-narrow { padding: 0 18px; }
  h1, .hero h1 { font-size: clamp(2.25rem, 9vw, 3rem); }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .card, .feature, .app-body { padding: 24px 20px; }
  .contact-form { padding: 28px 22px; }
}