/* ============================================================
   Aive — landing.css
   랜딩페이지 전용 섹션 스타일
   · Hero (네트워크 다이어그램 + 목업)
   · Integrations (로고 그리드)
   · How it works (4단계 인포그래픽)
   · Before & After (비교 + 지표)
   · Pricing (3 카드)
   · Final CTA
   ============================================================ */

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(212,255,58,0.08), transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(212,255,58,0.04), transparent 60%);
  pointer-events: none;
}
.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 40%, transparent 100%);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
}
.hero h1 {
  font-size: clamp(44px, 5.2vw, 72px);
  margin: 0 0 28px;
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--text);
}
.hero h1 .accent {
  color: var(--accent);
  font-weight: 700;
}
.hero-sub {
  font-size: 18px;
  color: var(--text-sub);
  line-height: 1.7;
  margin: 0 0 40px;
  max-width: 540px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  margin-bottom: 36px;
}
.hero-trust {
  display: flex;
  gap: 28px;
  font-size: 13px;
  color: var(--text-sub);
  flex-wrap: wrap;
}
.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.hero-trust .check { color: var(--accent); }

/* ---------- Hero Visual (네트워크 + 목업) ---------- */
.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 660px;
  justify-self: end;
  width: 100%;
}
.hero-network {
  position: absolute;
  inset: -6%;
  opacity: 0.92;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 90% 90% at center, #000 70%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 90% at center, #000 70%, transparent 100%);
}
.hero-network svg {
  width: 100%;
  height: 100%;
  display: block;
}
.net-line {
  stroke: var(--accent);
  stroke-width: 1.2;
  stroke-opacity: 0.5;
  stroke-dasharray: 3 6;
  animation: netFlow 4s linear infinite;
}
.net-line.nl2 { animation-duration: 4.6s; }
.net-line.nl3 { animation-duration: 3.6s; }
.net-line.nl4 { animation-duration: 5s; }
.net-line.nl5 { animation-duration: 4.2s; }
.net-line.nl6 { animation-duration: 3.8s; }
.net-line.nl7 { animation-duration: 4.8s; }
@keyframes netFlow {
  to { stroke-dashoffset: -36; }
}
.net-node {
  transform-box: fill-box;
  transform-origin: center;
  animation: netFloat 7s ease-in-out infinite;
}
.net-node.n1 { animation-delay: 0s; }
.net-node.n2 { animation-delay: -1s; }
.net-node.n3 { animation-delay: -2s; }
.net-node.n4 { animation-delay: -3s; }
.net-node.n5 { animation-delay: -4s; }
.net-node.n6 { animation-delay: -5s; }
.net-node.n7 { animation-delay: -6s; }
@keyframes netFloat {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(0, -8px); }
}
.net-hub {
  transform-box: fill-box;
  transform-origin: center;
  animation: netHubPulse 4s ease-in-out infinite;
}
@keyframes netHubPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}

/* Hero 내부 목업 위치 */
.mockup-chatgpt {
  position: absolute;
  bottom: 4%;
  right: 2%;
  width: 66%;
  z-index: 5;
  backdrop-filter: blur(8px);
  background: rgba(22, 22, 26, 0.94);
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.9), 0 0 0 1px var(--line);
}

/* ============================================================
   Trust Bar (Works with Aive)
   ============================================================ */
.trust-bar {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  padding: 60px 0;
  background: var(--bg-elev);
}
.trust-head {
  text-align: center;
  margin-bottom: 48px;
}
.trust-head .label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}
.trust-head h3 {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 400;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.trust-head p {
  color: var(--text-sub);
  max-width: 560px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.7;
}
.logo-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 20px;
}
.logo-cell {
  background: var(--bg-elev);
  aspect-ratio: 2.2 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px 10px;
  transition: background 0.2s;
  gap: 8px;
}
.logo-cell:hover { background: var(--bg-card); }
.logo-mark {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.02em;
}
.logo-cell .kind {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-mute);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ============================================================
   AI Channels Detail (탭 + 패널)
   ============================================================ */
.channels {
  background: var(--bg);
}
.channel-tabs {
  display: flex;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 6px;
  margin: 0 auto 48px;
  width: fit-content;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}
.channel-tabs::-webkit-scrollbar { display: none; }
.channel-tab {
  background: transparent;
  border: none;
  padding: 12px 22px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.channel-tab:hover { color: var(--text); }
.channel-tab.active {
  background: var(--accent);
  color: #0a0a0b;
}
.channel-tab .dot-color {
  width: 8px; height: 8px;
  border-radius: 50%;
}

.channel-panel {
  display: none;
  animation: channelFade 0.4s ease-out;
}
.channel-panel.active { display: block; }
@keyframes channelFade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.channel-panel-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: stretch;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.channel-panel-info {
  padding: 44px 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.channel-panel-info .badge {
  align-self: flex-start;
  margin-bottom: 20px;
}
.channel-panel-info h3 {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  line-height: 1.15;
}
.channel-panel-info .lead {
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.7;
  margin: 0 0 28px;
}

.channel-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 28px;
  padding: 20px 22px;
  background: var(--bg-elev);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}
.channel-stat .label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-mute);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.channel-stat .value {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.channel-stat .value .unit {
  font-size: 12px;
  color: var(--text-sub);
  font-family: var(--font-mono);
  margin-left: 3px;
}

.channel-opt-title {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}
.channel-opt-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
}
.channel-opt-list li {
  font-size: 13.5px;
  color: var(--text-sub);
  padding: 8px 0;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.55;
}
.channel-opt-list li::before {
  content: "→";
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
  margin-top: 1px;
}
.channel-opt-list li strong {
  color: var(--text);
  font-weight: 500;
}

/* Sample preview (우측) */
.channel-panel-demo {
  padding: 36px;
  background: linear-gradient(135deg, var(--bg-elev) 0%, var(--bg-card-2) 100%);
  border-left: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  position: relative;
}
.channel-panel-demo::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.channel-demo-label {
  position: relative;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-mute);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.channel-demo-mockup {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 20px 60px -20px rgba(0,0,0,0.6);
  overflow: hidden;
}
.channel-demo-header {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-mute);
}
.channel-demo-header .source-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
}
.channel-demo-body {
  padding: 18px 20px;
}
.channel-demo-query {
  font-size: 12.5px;
  color: var(--text-sub);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px dashed var(--line-soft);
}
.channel-demo-query::before {
  content: "Q. ";
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 500;
}
.channel-demo-answer {
  font-size: 13px;
  color: var(--text);
  line-height: 1.7;
}
.channel-demo-answer .highlight {
  background: rgba(212,255,58,0.1);
  color: var(--accent);
  padding: 1px 4px;
  border-radius: 3px;
  font-weight: 500;
}
.channel-demo-citation {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 4px;
  padding: 1px 5px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 10px;
  border-radius: 3px;
  vertical-align: text-top;
  text-decoration: none;
}
.channel-demo-card {
  margin-top: 12px;
  padding: 12px 14px;
  background: rgba(212,255,58,0.04);
  border: 1px solid var(--accent-soft);
  border-radius: 8px;
  font-size: 12px;
}
.channel-demo-card strong {
  display: block;
  color: var(--accent);
  margin-bottom: 4px;
  font-size: 13px;
}
.channel-demo-card span { color: var(--text-sub); line-height: 1.5; }
.channel-demo-meta {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-mute);
  letter-spacing: 0.05em;
}

.channel-coverage {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--bg-elev);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-sub);
  letter-spacing: 0.05em;
  align-self: flex-start;
}
.channel-coverage .cov-bar {
  width: 80px; height: 4px;
  background: var(--line);
  border-radius: 2px;
  overflow: hidden;
}
.channel-coverage .cov-bar .fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
}
.channel-coverage .cov-val { color: var(--accent); font-weight: 500; }


/* ============================================================
   How it works (4단 인포그래픽)
   ============================================================ */
.how { background: var(--bg); }
.how-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.how-step {
  padding: 36px 28px;
  border: 1px solid var(--line-soft);
  margin-right: -1px;
  background: var(--bg-card);
  position: relative;
  transition: background 0.2s;
}
.how-step:first-child {
  border-top-left-radius: var(--radius-lg);
  border-bottom-left-radius: var(--radius-lg);
}
.how-step:last-child {
  border-top-right-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
  margin-right: 0;
}
.how-step:hover { background: var(--bg-card-2); }
.how-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}
.how-icon {
  width: 54px; height: 54px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
}
.how-title {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--text);
}
.how-desc {
  font-size: 14.5px;
  color: var(--text-sub);
  line-height: 1.65;
  margin: 0 0 24px;
}
.how-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.how-arrow {
  position: absolute;
  top: 62px;
  right: -10px;
  width: 20px; height: 20px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  color: var(--accent);
  font-size: 11px;
}
.how-step:last-child .how-arrow { display: none; }

/* ============================================================
   Before & After
   ============================================================ */
.ba {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elev) 100%);
}
.ba-compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
}
.ba-panel {
  padding: 44px;
  position: relative;
}
.ba-panel.before { background: var(--bg-card); }
.ba-panel.after {
  background: linear-gradient(135deg, rgba(212,255,58,0.04), rgba(212,255,58,0.01));
}
.ba-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 500;
  margin: 14px 0;
  letter-spacing: -0.02em;
}
.ba-desc {
  font-size: 14.5px;
  color: var(--text-sub);
  line-height: 1.65;
  margin: 0 0 28px;
}
.ba-mockup {
  background: #0a0a0b;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
}
.ba-query {
  color: var(--text-sub);
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
  margin-bottom: 14px;
}
.ba-query::before { content: "› "; color: var(--accent); }
.ba-result {
  color: var(--text);
  line-height: 1.7;
}
.ba-result .highlight {
  color: var(--accent);
  background: rgba(212,255,58,0.08);
  padding: 1px 4px;
  border-radius: 3px;
}
.ba-missing {
  color: var(--text-mute);
  font-style: italic;
}
.ba-ranking { margin-top: 14px; }
.ba-rank-item {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 11.5px;
}
.ba-rank-item:last-child { border-bottom: none; }
.ba-rank-item .num {
  color: var(--text-mute);
  width: 24px;
}
.ba-rank-item .name {
  flex: 1;
  color: var(--text-sub);
}
.ba-rank-item.mine .name {
  color: var(--accent);
  font-weight: 500;
}
.ba-rank-item.mine .num { color: var(--accent); }
.ba-rank-item .tag-col {
  font-size: 10px;
  color: var(--text-mute);
  font-family: var(--font-mono);
}
.ba-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  background: var(--bg-elev);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  min-width: 80px;
}
.ba-arrow {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #0a0a0b;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 0 40px rgba(212,255,58,0.3);
}
.ba-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.ba-stat {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
}
.ba-stat .num {
  font-family: var(--font-display);
  font-size: 48px;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
  font-weight: 400;
}
.ba-stat .label {
  font-size: 14px;
  color: var(--text-sub);
}
.ba-stat .note {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-mute);
  margin-top: 10px;
  letter-spacing: 0.08em;
}

/* ============================================================
   Pricing
   ============================================================ */
.pricing { background: var(--bg); }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.price-card {
  padding: 40px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}
.price-card:hover {
  transform: translateY(-4px);
  border-color: var(--text-sub);
}
.price-card.featured {
  background: linear-gradient(180deg, rgba(212,255,58,0.05), var(--bg-card) 50%);
  border-color: var(--accent);
}
.price-card.featured::before {
  content: "RECOMMENDED";
  position: absolute;
  top: -11px; left: 32px;
  background: var(--accent);
  color: #0a0a0b;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 0.1em;
}
.price-name {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 500;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.price-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-mute);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.price-amount {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 8px;
}
.price-amount .num {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 400;
  color: var(--text);
  letter-spacing: -0.02em;
}
.price-amount .unit {
  font-size: 14px;
  color: var(--text-sub);
}
.price-free .num { color: var(--accent); }
.price-desc {
  font-size: 13.5px;
  color: var(--text-sub);
  margin: 4px 0 28px;
  min-height: 42px;
}
.price-features {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  border-top: 1px solid var(--line-soft);
  padding-top: 24px;
  flex: 1;
}
.price-features li {
  font-size: 14px;
  color: var(--text-sub);
  padding: 8px 0;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.price-features li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 600;
  margin-top: 1px;
}
.price-features li strong {
  color: var(--text);
  font-weight: 500;
}

/* ============================================================
   Final CTA
   ============================================================ */
.final-cta {
  background: var(--bg-elev);
  border-top: 1px solid var(--line-soft);
}
.final-cta-inner {
  padding: 100px 0;
  text-align: center;
  position: relative;
}
.final-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 400;
  margin: 20px 0;
  letter-spacing: -0.02em;
}
.final-cta h2 em {
  color: var(--accent);
  font-style: normal;
  font-weight: 700;
}
.final-cta p {
  color: var(--text-sub);
  font-size: 17px;
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 40px;
}
.final-cta .hero-cta {
  justify-content: center;
  margin: 0 0 28px;
}
.final-cta .hero-trust { justify-content: center; }

/* ============================================================
   Landing Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 60px;
  }
  .hero-visual {
    justify-self: center;
    width: 100%;
    max-width: 500px;
  }
  .how-grid { grid-template-columns: repeat(2, 1fr); }
  .how-step {
    border-radius: 0 !important;
    margin: 0;
  }
  .how-step:first-child,
  .how-step:nth-child(2) { margin-bottom: -1px; }
  .logo-grid { grid-template-columns: repeat(4, 1fr); }
  .ba-compare { grid-template-columns: 1fr; }
  .ba-divider {
    padding: 20px;
    border: 1px solid var(--line);
    border-left: 0;
    border-right: 0;
  }
  .ba-arrow { transform: rotate(90deg); }
  .pricing-grid { grid-template-columns: 1fr; }
  .channel-panel-grid {
    grid-template-columns: 1fr;
  }
  .channel-panel-demo {
    border-left: 0;
    border-top: 1px solid var(--line-soft);
  }
}
@media (max-width: 640px) {
  .how-grid { grid-template-columns: 1fr; }
  .logo-grid { grid-template-columns: repeat(2, 1fr); }
  .ba-stats { grid-template-columns: 1fr; }
  .channel-panel-info,
  .channel-panel-demo { padding: 28px 24px; }
  .channel-panel-info h3 { font-size: 28px; }
  .channel-stats { grid-template-columns: 1fr; }
}

/* ---------- Zero-Click Section (01) ---------- */
.zeroclick {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-card-2) 100%);
  padding: var(--section-pad) 0;
  position: relative;
  overflow: hidden;
}
.zeroclick::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 900px; height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--accent-soft) 50%, transparent 100%);
}
.zeroclick .container { position: relative; z-index: 1; }
.zeroclick .section-head {
  margin-bottom: 56px;
  text-align: center;
}
.zeroclick .section-head .eyebrow {
  margin-bottom: 16px;
  color: var(--warn);
}
.zeroclick .section-head .eyebrow::before {
  background: var(--warn);
  box-shadow: 0 0 12px var(--warn);
}
.zeroclick .section-head h2 {
  font-size: clamp(36px, 4vw, 56px);
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.zeroclick .section-head h2 em {
  font-style: normal;
  color: var(--warn);
}
.zeroclick .section-head .sub-copy {
  margin: 0 auto;
  max-width: 640px;
}
.zc-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.zc-stat {
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  position: relative;
  transition: all 0.2s;
}
.zc-stat:hover {
  border-color: var(--text-sub);
  transform: translateY(-2px);
}
.zc-stat-num {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text);
  margin-bottom: 12px;
}
.zc-stat-num em {
  color: var(--warn);
  font-style: normal;
}
.zc-stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-bottom: 12px;
}
.zc-stat-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-sub);
}
.zc-stat-source {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-mute);
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  letter-spacing: 0.05em;
}
.zc-bridge {
  margin-top: 56px;
  padding: 32px 40px;
  background: var(--bg-card);
  border: 1px solid var(--accent-soft);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  gap: 28px;
  justify-content: space-between;
  flex-wrap: wrap;
}
.zc-bridge-text {
  flex: 1;
  min-width: 260px;
}
.zc-bridge-text .bridge-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 8px;
}
.zc-bridge-text .bridge-head {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.4;
}
.zc-bridge-text .bridge-head em {
  font-style: normal;
  color: var(--accent);
}
.zc-bridge .arrow-ico {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: rgba(212,255,58,0.1);
  border: 1px solid var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
@media (max-width: 860px) {
  .zc-stats { grid-template-columns: 1fr; }
  .zc-bridge { padding: 24px; }
}

/* ---------- Dogfooding Section (05 · Aive Self-Applied) ---------- */
.dogfood {
  background: var(--bg);
  padding: var(--section-pad) 0;
  position: relative;
  overflow: hidden;
}
.dogfood::before {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 900px; height: 400px;
  background: radial-gradient(circle, rgba(212,255,58,0.03) 0%, transparent 70%);
  pointer-events: none;
}
.dogfood .container { position: relative; z-index: 1; }
.dogfood .section-head {
  text-align: center;
  margin-bottom: 56px;
}
.dogfood .section-head .eyebrow {
  margin-bottom: 16px;
}
.dogfood .section-head h2 {
  font-size: clamp(32px, 3.5vw, 48px);
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.dogfood .section-head h2 em {
  font-style: normal;
  color: var(--accent);
}
.dogfood .section-head .sub-copy {
  margin: 0 auto;
  max-width: 640px;
}
.df-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.df-item {
  padding: 24px 26px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all 0.15s;
}
.df-item:hover {
  border-color: var(--accent-soft);
  background: var(--bg-card-2);
}
.df-check {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(212,255,58,0.1);
  border: 1px solid var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
  font-weight: 700;
  font-size: 12px;
}
.df-content {
  flex: 1;
  min-width: 0;
}
.df-title {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.df-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-sub);
}
.df-tech {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-mute);
  letter-spacing: 0.04em;
  margin-top: 6px;
}
.df-proof {
  margin-top: 40px;
  padding: 28px 32px;
  background: var(--bg-card-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  text-align: center;
}
.df-proof-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-mute);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.df-proof-text {
  font-family: var(--font-sans);
  font-size: 17px;
  color: var(--text-sub);
  line-height: 1.7;
}
.df-proof-text strong {
  color: var(--text);
  font-weight: 600;
}
@media (max-width: 860px) {
  .df-grid { grid-template-columns: 1fr; }
}