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

:root {
  --bg: #000000;
  --surface: #0a0a0a;
  --surface-2: rgba(255,255,255,0.02);
  --surface-3: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.08);
  --border-h: rgba(255,255,255,0.18);
  --text: #ffffff;
  --text-2: rgba(255,255,255,0.58);
  --text-3: rgba(255,255,255,0.3);
  --accent: #b8e000;
  --cyan: #00e5ff;
  --font-sans: 'Inter', 'PingFang SC', 'Helvetica Neue', sans-serif;
}

html, body {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.38;
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  height: 64px;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.nav-logo {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  color: rgba(255,255,255,0.92);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-2);
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--text);
}

.nav-cta {
  font-size: 14px;
  font-weight: 500;
  padding: 8px 20px;
  border-radius: 6px;
  border: 1px solid var(--border-h);
  color: var(--text);
  transition: border-color 0.2s, color 0.2s;
  cursor: pointer;
}

.nav-cta:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.snap-scroll {
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-snap-type: y mandatory;
  overscroll-behavior-y: contain;
}

.screen {
  position: relative;
  min-height: 100vh;
  height: 100vh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 96px 0 40px;
  overflow: hidden;
}

.container {
  width: min(1200px, calc(100% - 96px));
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.screen-header {
  text-align: center;
  margin-bottom: 40px;
}

.screen-header.left {
  text-align: left;
}

.section-label,
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section-label {
  color: var(--text-3);
  margin-bottom: 14px;
}

.hero-shell {
  text-align: center;
}

.hero-badge {
  color: var(--accent);
  border: 1px solid rgba(184,224,0,0.25);
  border-radius: 100px;
  padding: 5px 14px;
  margin-bottom: 34px;
}

.hero-badge.cyan {
  color: var(--cyan);
  border-color: rgba(0,229,255,0.28);
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 720px;
  height: 420px;
  background: radial-gradient(ellipse at center, rgba(184,224,0,0.07) 0%, rgba(0,229,255,0.04) 40%, transparent 70%);
  pointer-events: none;
  filter: blur(40px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 34px;
  align-items: center;
}

.hero-copy {
  text-align: left;
}

.hero-copy.center {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(44px, 7.5vw, 92px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.035em;
  margin-bottom: 10px;
}

.hero-em {
  background: linear-gradient(90deg, #ffffff 0%, #b8e000 22%, #00e5ff 45%, #ffffff 58%, #b8e000 75%, #00e5ff 88%, #ffffff 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 9s linear infinite;
}

@keyframes shimmer {
  0% { background-position: 0% center; }
  100% { background-position: 200% center; }
}

.hero-sub,
.section-sub,
.panel p,
.metric-card p,
.card p,
.timeline-card p,
.footer-brand p,
.footer-col a,
.footer-bottom {
  color: var(--text-2);
}

.hero-sub {
  font-size: clamp(16px, 2vw, 22px);
  line-height: 1.7;
  margin-bottom: 52px;
}

.hero-actions,
.cta-actions,
.form-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-copy.center .hero-actions,
.hero-copy.center .cta-actions {
  justify-content: center;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 8px;
  font-size: 14px;
  transition: background 0.2s, transform 0.15s, border-color 0.2s, color 0.2s;
  cursor: pointer;
}

.btn-primary {
  background: rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.88);
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.14);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-primary:hover {
  background: rgba(199,210,214,0.12);
  border-color: rgba(199,210,214,0.24);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-2);
  font-weight: 500;
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--border-h);
  color: var(--text);
}

.hero-side,
.stack-grid,
.grid-2,
.grid-3,
.grid-4,
.grid-5,
.solution-rows,
.contact-layout {
  display: grid;
  gap: 18px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

.metric-card,
.card,
.timeline-card,
.solution-row,
.footer-shell,
.form-card,
.contact-card {
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 14px;
}

.metric-card,
.card,
.timeline-card,
.form-card,
.contact-card {
  padding: 24px;
}

.metric-value {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(26px, 3.5vw, 42px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 18px;
}

.section-sub {
  font-size: 17px;
  line-height: 1.75;
  max-width: 600px;
}

.screen-header .section-sub {
  margin-left: auto;
  margin-right: auto;
}

.screen.centered .container,
.screen.full-center .container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.tag.lingshu { background: rgba(184,224,0,0.1); color: var(--accent); }
.tag.lingxun { background: rgba(0,229,255,0.1); color: var(--cyan); }

.card h3,
.timeline-card h3,
.solution-row h3,
.form-card h3,
.contact-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.list-block {
  display: grid;
  gap: 18px;
}

.list-item {
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.list-item:first-child {
  padding-top: 0;
  border-top: none;
}

.list-item strong,
.meta strong,
.solution-cell strong {
  display: block;
  font-size: 15px;
  margin-bottom: 8px;
}

.timeline-card .index {
  font-size: 12px;
  color: var(--text-3);
  margin-bottom: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.solution-row {
  padding: 26px;
  display: grid;
  gap: 18px;
}

.solution-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.solution-cell {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-3);
}

.result-tag {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 12px;
}

.footer-shell {
  padding: 26px;
  margin-top: 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 30px;
}

.footer-brand .brand-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 14px;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  margin-top: 22px;
  border-top: 1px solid var(--border);
  font-size: 13px;
}

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.contact-layout {
  grid-template-columns: 1.05fr 0.95fr;
  align-items: start;
}

.form-grid {
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field label {
  font-size: 14px;
  color: var(--text-2);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.02);
  color: var(--text);
  padding: 14px 16px;
  outline: none;
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.field-help {
  color: var(--text-3);
  font-size: 12px;
}

.field.is-invalid input,
.field.is-invalid select,
.field.is-invalid textarea {
  border-color: rgba(255,113,113,0.7);
}

.form-feedback {
  min-height: 24px;
  font-size: 14px;
  color: var(--text-2);
}

.form-feedback.is-error { color: #ff9b9b; }
.form-feedback.is-success { color: var(--accent); }

.contact-card ul {
  list-style: none;
  display: grid;
  gap: 12px;
  margin: 18px 0 22px;
}

.contact-card li {
  padding-top: 12px;
  border-top: 1px solid var(--border);
  color: var(--text-2);
}

.contact-card li:first-child {
  padding-top: 0;
  border-top: none;
}

.statement-layout,
.privacy-layout,
.scoring-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.statement-copy {
  max-width: 560px;
}

.statement-copy .lead-statement {
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
}

.statement-copy .lead-statement em {
  font-style: normal;
  color: var(--accent);
}

.statement-copy p,
.privacy-copy p,
.score-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-2);
}

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

.stack-card {
  padding: 24px 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
}

.stack-meta,
.eyebrow-meta {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 10px;
}

.stack-card h4,
.feature-card h4,
.flow-step h4,
.role-card h4,
.dimension-card h4,
.scenario-item h4,
.exec-card h4,
.memory-cell h4,
.center-cell h4 {
  font-size: 15px;
  margin-bottom: 8px;
}

.stack-card p,
.feature-card p,
.flow-step p,
.role-card p,
.dimension-card p,
.exec-card p,
.scenario-item p,
.memory-cell p,
.center-cell p,
.score-note,
.privacy-points li,
.scenario-points li {
  color: var(--text-3);
  font-size: 13px;
  line-height: 1.65;
}

.feature-card,
.role-card,
.dimension-card,
.flow-step,
.score-card,
.scenario-panel,
.privacy-diagram,
.note-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-2);
}

.feature-card,
.role-card,
.dimension-card,
.flow-step,
.score-card,
.note-card {
  padding: 24px;
}

.screen-top-strip {
  position: absolute;
  top: 64px;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  z-index: 3;
}

.strip-band {
  width: 100vw;
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}

.strip-track {
  display: flex;
  gap: 64px;
  width: max-content;
  animation: marquee 24s linear infinite;
}

.strip-item {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text-3);
  white-space: nowrap;
  font-size: 13px;
}

.strip-item::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.memory-grid,
.centers-grid {
  display: grid;
  gap: 2px;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: rgba(255,255,255,0.01);
}

.memory-grid { grid-template-columns: repeat(4, 1fr); }
.centers-grid { grid-template-columns: repeat(5, 1fr); }

.memory-cell,
.center-cell {
  padding: 32px 22px;
  background: var(--surface);
}

.cell-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.cell-icon svg {
  width: 20px;
  height: 20px;
}

.center-icon {
  width: 32px;
  height: 32px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.center-icon svg {
  width: 18px;
  height: 18px;
}

.exec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.exec-card {
  position: relative;
  padding: 36px 32px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
}

.exec-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.2s;
}

.exec-card:hover::before {
  opacity: 1;
}

.exec-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
}

.note-card {
  margin-top: 18px;
}

.note-card strong {
  color: var(--accent);
}

.scenario-tabs {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 18px;
}

.scenario-tab {
  flex: 1;
  padding: 16px 24px;
  background: transparent;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  font-size: 14px;
  font-weight: 500;
}

.scenario-tab + .scenario-tab {
  border-left: 1px solid var(--border);
}

.scenario-tab.is-active {
  color: var(--accent);
  background: rgba(184,224,0,0.08);
}

.scenario-panel {
  display: none;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  padding: 0;
  border: none;
  background: transparent;
}

.scenario-panel.is-active {
  display: grid;
}

.scenario-item {
  padding: 28px 32px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
}

.scenario-points,
.privacy-points,
.role-points {
  list-style: none;
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.scenario-points li,
.privacy-points li,
.role-points li {
  display: flex;
  gap: 10px;
}

.scenario-points li::before,
.privacy-points li::before,
.role-points li::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 10px;
  flex-shrink: 0;
}

.privacy-diagram {
  position: relative;
  aspect-ratio: 1;
  max-width: 400px;
  width: 100%;
  margin: 0 auto;
}

.ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid var(--border);
}

.ring.outer {
  background: radial-gradient(circle at center, rgba(184,224,0,0.04) 0%, transparent 70%);
}

.ring.mid {
  inset: 18%;
  border-color: rgba(184,224,0,0.12);
  background: radial-gradient(circle at center, rgba(184,224,0,0.06) 0%, transparent 70%);
}

.ring.inner {
  inset: 36%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-color: rgba(184,224,0,0.25);
  background: rgba(184,224,0,0.06);
}

.ring.inner strong {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.ring.inner small {
  font-size: 10px;
  color: var(--text-3);
}

.ring-label {
  position: absolute;
  color: var(--text-3);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.ring-label::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-3);
}

.ring-label.top { top: 8%; right: 5%; }
.ring-label.bottom { bottom: 18%; left: 2%; }

.score-dimensions {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.score-bar {
  height: 4px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
  margin-top: 8px;
}

.score-bar > span {
  display: block;
  height: 100%;
  background: var(--accent);
}

.score-card .score-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}

.score-card .score-big {
  font-size: 52px;
  line-height: 1;
  font-weight: 800;
  color: var(--accent);
}

.score-card .score-meta {
  color: var(--text-3);
  font-size: 12px;
}

.score-list {
  display: grid;
  gap: 12px;
}

.score-line {
  display: grid;
  grid-template-columns: 82px 1fr 36px;
  gap: 12px;
  align-items: center;
  color: var(--text-2);
  font-size: 13px;
}

.workflow-grid,
.workflow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.workflow-steps {
  position: relative;
  gap: 0;
}

.workflow-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5%);
  right: calc(12.5%);
  height: 1px;
  background: linear-gradient(90deg, var(--accent), rgba(255,255,255,0.08));
  pointer-events: none;
}

.flow-step {
  text-align: center;
}

.flow-dot {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: rgba(184,224,0,0.06);
}

.wstep {
  padding: 0 20px 0;
  text-align: center;
}

.wstep-dot {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(184,224,0,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--accent);
}

.wstep h4 {
  font-size: 15px;
  margin-bottom: 8px;
}

.wstep p {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.65;
}

.role-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.role-points li {
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.65;
}

.accent-cyan {
  --accent: #00cfff;
}

.accent-cyan .hero-badge {
  color: var(--accent);
  border-color: rgba(0,229,255,0.28);
}

.accent-cyan .strip-item::before,
.accent-cyan .scenario-points li::before,
.accent-cyan .privacy-points li::before,
.accent-cyan .role-points li::before,
.accent-cyan .score-bar > span {
  background: var(--accent);
}

.accent-cyan .scenario-tab.is-active {
  color: var(--accent);
  background: rgba(0,229,255,0.08);
}

.accent-cyan .ring.inner {
  border-color: rgba(0,229,255,0.28);
  background: rgba(0,229,255,0.06);
}

.accent-cyan .ring.mid {
  border-color: rgba(0,229,255,0.12);
  background: radial-gradient(circle at center, rgba(0,229,255,0.06) 0%, transparent 70%);
}

.accent-cyan .ring.outer {
  background: radial-gradient(circle at center, rgba(0,229,255,0.04) 0%, transparent 70%);
}

.accent-cyan .ring.inner strong,
.accent-cyan .score-card .score-big,
.accent-cyan .flow-dot,
.accent-cyan .note-card strong,
.accent-cyan .wstep-dot {
  color: var(--accent);
}

.accent-cyan .flow-dot,
.accent-cyan .wstep-dot {
  background: rgba(0,229,255,0.06);
}

@media (max-width: 1100px) {
  .screen {
    height: auto;
    min-height: 100vh;
    padding: 104px 0 56px;
  }

  .snap-scroll {
    scroll-snap-type: y proximity;
  }

  .hero-grid,
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-5,
  .memory-grid,
  .centers-grid,
  .centers-grid-2,
  .exec-grid,
  .workflow-grid,
  .workflow-steps,
  .role-grid,
  .statement-layout,
  .privacy-layout,
  .scoring-layout,
  .solution-grid,
  .contact-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .scenario-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  body { overflow: auto; }
  nav { padding: 0 24px; }
  .nav-links { display: none; }
  .container { width: min(1200px, calc(100% - 48px)); }
  .hero-title { font-size: clamp(44px, 12vw, 64px); }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { text-align: center; }
  .screen-top-strip { top: 64px; }
  .strip-band { padding: 18px 0; }
  .workflow-steps::before { display: none; }
  .scenario-tabs { display: grid; grid-template-columns: 1fr; }
  .scenario-tab + .scenario-tab {
    border-left: none;
    border-top: 1px solid var(--border);
  }
  .score-line { grid-template-columns: 72px 1fr 30px; gap: 10px; }
  .hero-actions,
  .cta-actions,
  .form-actions {
    flex-direction: column;
  }
  .hero-actions a,
  .cta-actions a,
  .form-actions > * {
    width: 100%;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}