/* ═══════════════════════════════════════════
   DESIGN SYSTEM
═══════════════════════════════════════════ */
:root {
  /* Color */
  --ink:        #0C0C0C;
  --ink-2:      #3A3A3A;
  --ink-3:      #6B6B6B;
  --ink-4:      #9E9E9E;
  --ink-5:      #C8C8C8;
  --border:     #E3E3E3;
  --border-2:   #EEEEEE;
  --surf-1:     #FFFFFF;
  --surf-2:     #F8F8F8;
  --surf-3:     #F2F2F2;
  --dark:       #0C0C0C;
  --dark-2:     #161616;
  --dark-3:     #1F1F1F;
  --orange:     #FF5524;
  --orange-h:   #E84419;
  --orange-s:   #FFF3EF;
  --orange-b:   rgba(255,85,36,.16);

  /* Type scale */
  --fs-10: 0.625rem; --fs-11: 0.6875rem; --fs-12: 0.75rem; --fs-13: 0.8125rem;
  --fs-14: 0.875rem; --fs-15: 0.9375rem; --fs-16: 1rem; --fs-18: 1.125rem;
  --fs-20: 1.25rem; --fs-24: 1.5rem; --fs-28: 1.75rem; --fs-32: 2rem;
  --fs-40: 2.5rem; --fs-48: 3rem; --fs-56: 3.5rem; --fs-64: 4rem;

  /* Spacing (8px grid) */
  --s1: 8px;  --s2: 16px; --s3: 24px; --s4: 32px;
  --s5: 40px; --s6: 48px; --s8: 64px; --s10: 80px;
  --s12: 96px; --s16: 128px;

  /* Radius */
  --r3: 3px; --r6: 6px; --r8: 8px; --r12: 12px; --r16: 16px;

  /* Shadow */
  --sh-1: 0 1px 2px rgba(0,0,0,.04), 0 2px 6px rgba(0,0,0,.04);
  --sh-2: 0 2px 4px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.06);
  --sh-3: 0 4px 8px rgba(0,0,0,.05), 0 8px 32px rgba(0,0,0,.08);

  /* Transition */
  --t1: 140ms ease;
  --t2: 200ms ease;
  --t3: 280ms ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--surf-1);
  color: var(--ink);
  overflow-x: hidden;
  line-height: 1.6;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ─── SKIP NAV (a11y) ─── */
.skip-nav {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  background: var(--orange);
  color: #fff;
  padding: 12px 24px;
  font-size: var(--fs-14);
  font-weight: 700;
  border-radius: 0 0 var(--r8) 0;
}
.skip-nav:focus {
  left: 0;
}

/* ─── FOCUS STYLES (a11y) ─── */
:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

/* ─── REDUCED MOTION (a11y) ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .sr { opacity: 1; transform: none; }
}

/* ─── LAYOUT ─── */
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 var(--s3); }
.sec { padding: var(--s12) 0; }
.sec--gray { background: var(--surf-2); }
.sec--dark { background: var(--dark); color: #fff; }

/* ─── TYPOGRAPHY ─── */
.label {
  display: inline-flex; align-items: center; gap: var(--s1);
  font-family: 'DM Mono', monospace;
  font-size: var(--fs-12); font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--orange);
  background: var(--orange-s);
  border: 1px solid var(--orange-b);
  padding: 5px 14px; border-radius: var(--r3);
}
.label--dark {
  background: rgba(255,85,36,.12);
  border-color: rgba(255,85,36,.2);
  color: #FF8057;
}
.label .dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--orange); flex-shrink: 0;
}
.label .dot--live { animation: pulse-dot 2.2s ease infinite; }
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(.7); }
}

.h-display {
  font-family: 'Hanken Grotesk', 'Noto Sans JP', sans-serif;
  font-weight: 800; letter-spacing: -.025em; line-height: 1.05;
}
.h1 { font-size: clamp(var(--fs-48), 5.5vw, var(--fs-64)); }
.h2 { font-size: clamp(var(--fs-32), 4vw, var(--fs-48)); font-weight: 900; letter-spacing: -.02em; line-height: 1.15; }
.h3 { font-size: var(--fs-24); font-weight: 700; letter-spacing: -.01em; line-height: 1.3; }
.h4 { font-size: var(--fs-18); font-weight: 700; letter-spacing: -.005em; }

.body-lg  { font-size: var(--fs-18); line-height: 1.8; color: var(--ink-2); }
.body-md  { font-size: var(--fs-16); line-height: 1.75; color: var(--ink-2); }
.body-sm  { font-size: var(--fs-14); line-height: 1.7; color: var(--ink-3); }
.body-xs  { font-size: var(--fs-13); line-height: 1.6; color: var(--ink-4); }

.sec-head { max-width: 580px; }
.sec-head + * { margin-top: var(--s8); }
.sec-head .label { margin-bottom: var(--s2); }
.sec-head .h2 { margin-top: var(--s2); }
.sec-head .body-lg { margin-top: var(--s3); max-width: 560px; }
.sec-head--center { margin: 0 auto; text-align: center; }
.sec-head--center .body-lg { margin-left: auto; margin-right: auto; }

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 700; font-size: var(--fs-15);
  padding: 14px 28px; border-radius: var(--r6);
  transition: background var(--t1), color var(--t1), border-color var(--t1), transform var(--t2);
  white-space: nowrap; line-height: 1;
}
.btn:active { transform: scale(.98); }
.btn--primary {
  background: var(--orange); color: #fff;
  border: 1.5px solid var(--orange);
}
.btn--primary:hover { background: var(--orange-h); border-color: var(--orange-h); }
.btn--ghost {
  background: transparent; color: var(--ink);
  border: 1.5px solid var(--border);
}
.btn--ghost:hover { border-color: var(--ink-5); }
.btn--ghost-dark {
  background: transparent; color: rgba(255,255,255,.85);
  border: 1.5px solid rgba(255,255,255,.18);
}
.btn--ghost-dark:hover { border-color: rgba(255,255,255,.35); color: #fff; }
.btn--lg {
  padding: 16px 36px; font-size: var(--fs-16);
}
.btn-icon { width: 16px; height: 16px; flex-shrink: 0; }

/* ─── DIVIDER ─── */
.divider { border: none; border-top: 1px solid var(--border-2); }

/* ─── SCROLL REVEAL ─── */
.sr { opacity: 0; transform: translateY(20px); transition: opacity .55s ease, transform .55s ease; }
.sr.in { opacity: 1; transform: none; }
.sr-delay-1 { transition-delay: .07s; }
.sr-delay-2 { transition-delay: .14s; }
.sr-delay-3 { transition-delay: .21s; }
.sr-delay-4 { transition-delay: .28s; }

/* ════════════════════════════════════════════
   NAV
════════════════════════════════════════════ */
.nav {
  position: sticky; top: 0; z-index: 900;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-2);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; max-width: 1120px; margin: 0 auto; padding: 0 var(--s3);
}
.nav__logo {
  display: flex; align-items: center; gap: 6px;
}
.nav__wordmark {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: 18px; font-weight: 800; letter-spacing: -.03em; color: var(--ink);
}
.nav__wordmark em { font-style: normal; color: var(--orange); }
.nav__badge {
  font-family: 'DM Mono', monospace;
  font-size: 9px; font-weight: 500; letter-spacing: .08em;
  background: var(--orange); color: #fff;
  padding: 3px 7px; border-radius: 3px; text-transform: uppercase;
  line-height: 1;
}
.nav__links {
  display: flex; align-items: center; gap: var(--s5);
}
.nav__links a {
  font-size: var(--fs-14); font-weight: 500; color: var(--ink-2);
  transition: color var(--t1);
}
.nav__links a:hover { color: var(--ink); }
.nav__actions { display: flex; align-items: center; gap: 10px; }
.nav__actions .btn { padding: 10px 20px; font-size: var(--fs-14); }

/* ─── MOBILE MENU ─── */
.nav__toggle {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border-radius: var(--r6);
  color: var(--ink);
  transition: background var(--t1);
}
.nav__toggle:hover { background: var(--surf-3); }
.nav__toggle .icon-close { display: none; }
.nav__toggle[aria-expanded="true"] .icon-open { display: none; }
.nav__toggle[aria-expanded="true"] .icon-close { display: block; }

/* ════════════════════════════════════════════
   HERO
════════════════════════════════════════════ */
.hero {
  padding: var(--s10) 0 var(--s6);
  position: relative; overflow: hidden;
  background: var(--surf-1);
}
.hero__grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--border-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-2) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.35) 0%, transparent 72%);
}
.hero__inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--s10); align-items: center;
  position: relative;
}
.hero__content { padding-bottom: var(--s12); }
.hero__label { margin-bottom: var(--s3); }
.hero__h1 { margin-bottom: var(--s3); }
.hero__h1 .jp {
  display: block;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: clamp(32px, 8vw, 62px);
  font-weight: 900; letter-spacing: -.03em; line-height: 1.1;
  color: var(--ink);
}
.hero__h1 .en {
  display: block;
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: clamp(14px, 1.6vw, 18px);
  font-weight: 500; letter-spacing: .04em;
  color: var(--ink-4); text-transform: uppercase;
  margin-top: var(--s2); line-height: 1;
}
.hero__accent { color: var(--orange); }
.hero__body {
  font-size: var(--fs-18); line-height: 1.8; color: var(--ink-3);
  max-width: 480px; margin-bottom: var(--s5);
}
.hero__ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: var(--s6); }
.hero__stats {
  display: flex; gap: var(--s5); padding-top: var(--s4);
  border-top: 1px solid var(--border-2);
}
.hero__stat-num {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-28); font-weight: 800; color: var(--ink);
  letter-spacing: -.03em; line-height: 1;
}
.hero__stat-lbl {
  font-size: var(--fs-13); color: var(--ink-3); margin-top: 6px;
  line-height: 1.4;
}

/* POS Product Mockup */
.hero__visual {
  position: relative; align-self: flex-end;
  padding-bottom: 0;
}
.pos-frame {
  background: var(--surf-1);
  border: 1px solid var(--border);
  border-radius: var(--r16);
  box-shadow: var(--sh-3);
  overflow: hidden;
}
.pos-topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-2);
  background: var(--surf-2);
}
.pos-topbar__brand {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: 15px; font-weight: 700; color: var(--ink); letter-spacing: -.02em;
}
.pos-topbar__brand em { font-style: normal; color: var(--orange); }
.pos-topbar__status {
  display: flex; align-items: center; gap: 6px;
  font-family: 'DM Mono', monospace;
  font-size: 10px; color: #16A34A; font-weight: 500;
}
.pos-status-dot {
  width: 6px; height: 6px; border-radius: 50%; background: #16A34A;
  animation: pulse-dot 2.2s ease infinite;
}
.pos-body { padding: 20px; }

/* Scan area */
.pos-scan {
  background: var(--surf-3);
  border: 1.5px dashed var(--border);
  border-radius: var(--r8);
  padding: 24px 16px;
  text-align: center;
  margin-bottom: 16px;
  position: relative; overflow: hidden;
}
.pos-scan__line {
  position: absolute; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--orange), transparent);
  animation: scanline 2s ease-in-out infinite;
  opacity: .7;
}
@keyframes scanline {
  0%   { top: 10%; }
  50%  { top: 85%; }
  100% { top: 10%; }
}
.pos-scan__icon { margin: 0 auto 10px; color: var(--ink-4); }
.pos-scan__text {
  font-size: var(--fs-12); color: var(--ink-4); font-weight: 500;
}

/* Product rows */
.pos-items { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.pos-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px;
  background: var(--surf-2);
  border-radius: var(--r6);
  border: 1px solid var(--border-2);
}
.pos-item__icon { color: var(--ink-3); flex-shrink: 0; }
.pos-item__name { font-size: var(--fs-13); font-weight: 500; flex: 1; color: var(--ink-2); }
.pos-item__badge {
  font-family: 'DM Mono', monospace;
  font-size: 9px; color: #16A34A; font-weight: 500;
  background: #F0FDF4; border: 1px solid #BBF7D0;
  padding: 2px 7px; border-radius: 2px; white-space: nowrap;
}
.pos-item__price {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-14); font-weight: 700; color: var(--ink);
  letter-spacing: -.02em;
}

/* Total bar */
.pos-total {
  background: var(--ink);
  border-radius: var(--r8);
  padding: 14px 16px;
  display: flex; align-items: center; justify-content: space-between;
}
.pos-total__label { font-size: var(--fs-13); color: rgba(255,255,255,.55); font-weight: 500; }
.pos-total__amount {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-20); font-weight: 800; color: #fff; letter-spacing: -.03em;
}
.pos-footer {
  padding: 14px 20px;
  background: var(--orange);
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.pos-footer__text {
  font-size: var(--fs-14); font-weight: 700; color: #fff; letter-spacing: .01em;
}

/* Cert badge */
.hero__cert {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: var(--s3);
  padding: 8px 14px 8px 10px;
  background: var(--surf-2);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: var(--fs-12); color: var(--ink-3); font-weight: 500;
  letter-spacing: .01em;
}
.hero__cert-icon {
  color: #16A34A; flex-shrink: 0;
  width: 16px; height: 16px;
}

/* ════════════════════════════════════════════
   TRUST BAR
════════════════════════════════════════════ */
.trust {
  padding: var(--s5) 0;
  border-top: 1px solid var(--border-2);
  border-bottom: 1px solid var(--border-2);
  background: var(--surf-1);
  overflow: hidden;
}
.trust__inner {
  display: flex; flex-direction: column; align-items: center; gap: var(--s3);
}
.trust__label {
  font-family: 'DM Mono', monospace;
  font-size: var(--fs-12); color: var(--ink-4);
  letter-spacing: .12em; text-transform: uppercase;
  font-weight: 500;
}
.trust__marquee {
  width: 100%; position: relative;
  mask-image: linear-gradient(90deg, transparent 0%, #000 8%, #000 92%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 8%, #000 92%, transparent 100%);
}
.trust__track {
  display: flex; align-items: center; gap: var(--s2);
  width: max-content;
  animation: trust-scroll 24s linear infinite;
}
.trust__track:hover { animation-play-state: paused; }
@keyframes trust-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.trust__set {
  display: flex; align-items: center; gap: var(--s2);
  flex-shrink: 0;
}
.trust__chip {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px 10px 12px;
  background: var(--surf-1);
  border: 1px solid var(--border);
  border-radius: var(--r8);
  white-space: nowrap;
  flex-shrink: 0;
  transition: border-color var(--t1), box-shadow var(--t1);
}
.trust__chip:hover {
  border-color: var(--orange-b);
  box-shadow: 0 2px 8px rgba(255,85,36,.08);
}
.trust__chip-ico {
  width: 36px; height: 36px;
  border-radius: var(--r6);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  background: var(--orange-s);
  color: var(--orange);
}
.trust__chip-name {
  font-size: var(--fs-14); font-weight: 600; color: var(--ink-2);
  letter-spacing: .01em;
}
.trust__note {
  font-family: 'DM Mono', monospace;
  font-size: var(--fs-11); color: var(--ink-4);
  letter-spacing: .08em; text-transform: uppercase;
}
@media (prefers-reduced-motion: reduce) {
  .trust__track { animation: none; flex-wrap: wrap; justify-content: center; width: auto; }
  .trust__set:nth-child(2) { display: none; }
  .trust__marquee { mask-image: none; -webkit-mask-image: none; }
}

/* ════════════════════════════════════════════
   PROBLEM
════════════════════════════════════════════ */
.problem__grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
}
.problem-card {
  background: var(--surf-1);
  border: 1px solid var(--border);
  border-radius: var(--r12);
  padding: var(--s5);
  position: relative; overflow: hidden;
  transition: border-color var(--t2), box-shadow var(--t2);
}
.problem-card::before {
  content: '';
  position: absolute; left: 0; top: var(--s4); bottom: var(--s4);
  width: 3px; background: transparent;
  border-radius: 0 2px 2px 0;
  transition: background var(--t2);
}
.problem-card:hover { border-color: var(--ink-5); box-shadow: var(--sh-1); }
.problem-card:hover::before { background: var(--orange); }
.problem-card__num {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-28); font-weight: 800; color: var(--orange);
  letter-spacing: -.03em; margin-bottom: var(--s2);
  line-height: 1; opacity: .25;
}
.problem-card__icon {
  width: 44px; height: 44px;
  background: var(--surf-3);
  border-radius: var(--r8);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-3);
  margin-bottom: var(--s3);
  transition: background var(--t2), color var(--t2);
}
.problem-card:hover .problem-card__icon { background: var(--orange-s); color: var(--orange); }
.problem-card__title {
  font-size: var(--fs-18); font-weight: 700; color: var(--ink);
  margin-bottom: 10px; letter-spacing: -.01em;
}
.problem-card__body { font-size: var(--fs-15); line-height: 1.75; color: var(--ink-2); }

/* ════════════════════════════════════════════
   SOLUTION
════════════════════════════════════════════ */
.solution__inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--s12); align-items: center;
}
.solution__label { margin-bottom: var(--s3); }
.solution__h2 { color: #fff; margin-bottom: var(--s2); }
.solution__body { color: rgba(255,255,255,.6); margin-bottom: var(--s6); }
.solution__points { display: flex; flex-direction: column; gap: var(--s3); }
.sol-point {
  display: flex; gap: var(--s3); align-items: flex-start;
  padding-bottom: var(--s3);
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.sol-point:last-child { border-bottom: none; padding-bottom: 0; }
.sol-point__num {
  font-family: 'DM Mono', monospace;
  font-size: var(--fs-12); font-weight: 500;
  color: var(--orange); background: rgba(255,85,36,.12);
  border: 1px solid rgba(255,85,36,.18);
  width: 34px; height: 34px;
  border-radius: var(--r6);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; line-height: 1;
}
.sol-point__title { font-size: var(--fs-16); font-weight: 700; color: #fff; margin-bottom: 6px; }
.sol-point__body { font-size: var(--fs-14); color: rgba(255,255,255,.6); line-height: 1.75; }

/* Solution visual panel */
.sol-panel {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--r16);
  padding: var(--s5);
}
.sol-panel__label {
  font-family: 'DM Mono', monospace;
  font-size: var(--fs-12); color: rgba(255,255,255,.45);
  letter-spacing: .1em; text-transform: uppercase;
  margin-bottom: var(--s4);
}
.sol-ring-wrap {
  display: flex; align-items: center; gap: var(--s4);
  margin-bottom: var(--s5);
}
.sol-ring {
  position: relative; flex-shrink: 0;
  width: 120px; height: 120px;
}
.sol-ring svg { transform: rotate(-90deg); }
.sol-ring__center {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
}
.sol-ring__pct {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-28); font-weight: 800; color: #fff;
  letter-spacing: -.04em; line-height: 1;
}
.sol-ring__unit { font-size: var(--fs-11); color: rgba(255,255,255,.5); margin-top: 2px; font-family: 'DM Mono', monospace; }
.sol-ring__meta h4 { font-size: var(--fs-16); font-weight: 700; color: #fff; margin-bottom: 6px; }
.sol-ring__meta p { font-size: var(--fs-14); color: rgba(255,255,255,.55); line-height: 1.7; }

.sol-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
.sol-stat {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--r8);
  padding: 16px 14px; text-align: center;
}
.sol-stat__num {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-24); font-weight: 800;
  color: #FF8057; letter-spacing: -.03em; line-height: 1;
}
.sol-stat__lbl { font-size: var(--fs-12); color: rgba(255,255,255,.5); margin-top: 6px; line-height: 1.4; }

/* ════════════════════════════════════════════
   BENEFITS
════════════════════════════════════════════ */
.benefits__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.benefit-card {
  background: var(--surf-1); border: 1px solid var(--border);
  border-radius: var(--r12); padding: var(--s4);
  transition: border-color var(--t2), box-shadow var(--t2), transform var(--t3);
  position: relative;
}
.benefit-card:hover {
  border-color: var(--orange-b);
  box-shadow: var(--sh-2);
  transform: translateY(-3px);
}
.benefit-card__top {
  display: flex; align-items: flex-start; justify-content: space-between;
  margin-bottom: var(--s3);
}
.benefit-card__icon {
  width: 44px; height: 44px;
  background: var(--surf-3); border-radius: var(--r8);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-3);
  transition: background var(--t2), color var(--t2);
}
.benefit-card:hover .benefit-card__icon { background: var(--orange-s); color: var(--orange); }
.benefit-card__metric {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-20); font-weight: 800;
  color: var(--orange); letter-spacing: -.04em; line-height: 1;
}
.benefit-card__title { font-size: var(--fs-16); font-weight: 700; color: var(--ink); margin-bottom: 8px; letter-spacing: -.01em; }
.benefit-card__body { font-size: var(--fs-14); line-height: 1.75; color: var(--ink-2); }
.benefit-card__lbl { font-size: var(--fs-12); color: var(--ink-4); margin-top: 3px; font-family: 'DM Mono', monospace; }

/* ════════════════════════════════════════════
   FEATURES
════════════════════════════════════════════ */
.features__layout {
  display: grid; grid-template-columns: 300px 1fr; gap: var(--s8);
  align-items: start;
}
.feature-tabs {
  display: flex; flex-direction: column; gap: 4px;
  position: sticky; top: 88px;
}
.ftab {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; border-radius: var(--r8);
  border: 1px solid transparent;
  text-align: left; width: 100%;
  transition: background var(--t1), border-color var(--t1);
  cursor: pointer;
}
.ftab:hover { background: var(--surf-3); }
.ftab[aria-selected="true"] {
  background: var(--surf-1); border-color: var(--border);
  box-shadow: var(--sh-1);
}
.ftab__icon {
  width: 36px; height: 36px; flex-shrink: 0;
  background: var(--surf-3); border-radius: var(--r6);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-3);
  transition: background var(--t1), color var(--t1);
}
.ftab[aria-selected="true"] .ftab__icon { background: var(--orange-s); color: var(--orange); }
.ftab__label { font-size: var(--fs-15); font-weight: 600; color: var(--ink-2); }
.ftab__sub   { font-size: var(--fs-13); color: var(--ink-3); margin-top: 2px; }
.ftab[aria-selected="true"] .ftab__label { color: var(--ink); }

.feature-panels { min-height: 440px; }
.fpanel {
  display: none; animation: fade-up .28s ease;
}
.fpanel[aria-hidden="false"] { display: block; }
@keyframes fade-up {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}
.fpanel__label { margin-bottom: var(--s2); }
.fpanel__title { font-size: var(--fs-32); font-weight: 800; color: var(--ink); letter-spacing: -.02em; margin-bottom: var(--s2); }
.fpanel__body  { font-size: var(--fs-16); line-height: 1.8; color: var(--ink-2); margin-bottom: var(--s5); max-width: 560px; }
.fpanel__checks { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: var(--s5); }
.fcheck {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: var(--fs-14); color: var(--ink-2); line-height: 1.65;
}
.fcheck__ico {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--orange); color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 1px;
}
.fpanel__stats {
  display: flex; gap: 12px;
  background: var(--surf-3); border-radius: var(--r8);
  padding: var(--s3);
}
.fpstat {
  flex: 1; background: var(--surf-1);
  border: 1px solid var(--border-2); border-radius: var(--r6);
  padding: 16px; text-align: center;
}
.fpstat__num {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-24); font-weight: 800; color: var(--orange);
  letter-spacing: -.04em; line-height: 1;
}
.fpstat__lbl { font-size: var(--fs-12); color: var(--ink-3); margin-top: 5px; line-height: 1.4; }

/* ════════════════════════════════════════════
   ARCHITECTURE
════════════════════════════════════════════ */
.arch__diagram {
  display: grid; grid-template-columns: repeat(3, 1fr);
  background: var(--surf-1);
  border: 1px solid var(--border); border-radius: var(--r16);
  overflow: hidden;
}
.arch-col { border-right: 1px solid var(--border-2); }
.arch-col:last-child { border-right: none; }
.arch-col__head {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-2);
  background: var(--surf-2);
  display: flex; align-items: center; gap: 10px;
}
.arch-col__head-icon {
  width: 32px; height: 32px; border-radius: var(--r6);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
}
.arch-col__head-icon--foh  { background: #FFF3EF; color: var(--orange); }
.arch-col__head-icon--boh  { background: #EEF2FF; color: #4F46E5; }
.arch-col__head-icon--cloud{ background: #F0FDF4; color: #16A34A; }
.arch-col__head-title {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: var(--fs-14); font-weight: 700; letter-spacing: -.01em;
  color: var(--ink);
}
.arch-col__head-sub { font-size: var(--fs-12); color: var(--ink-4); margin-top: 2px; }
.arch-col__body { padding: 16px 12px; display: flex; flex-direction: column; gap: 8px; }
.arch-node {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 14px;
  background: var(--surf-2);
  border: 1px solid var(--border-2);
  border-radius: var(--r6);
  transition: border-color var(--t1), background var(--t1);
}
.arch-node:hover { background: var(--surf-1); border-color: var(--border); }
.arch-node__icon { color: var(--ink-4); flex-shrink: 0; }
.arch-node__name { font-size: var(--fs-14); font-weight: 600; color: var(--ink); }
.arch-node__sub  { font-size: var(--fs-12); color: var(--ink-3); margin-top: 2px; }
.arch-connect {
  display: flex; align-items: center; justify-content: center;
  padding: 4px 0; color: var(--ink-4);
}

/* ════════════════════════════════════════════
   HOW IT WORKS
════════════════════════════════════════════ */
.how__steps {
  display: grid; grid-template-columns: repeat(4, 1fr);
  position: relative; gap: 0;
  counter-reset: step;
}
/* Connecting line — vertically centered on the ring */
.how__steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: calc(12.5% + 32px); right: calc(12.5% + 32px);
  height: 2px;
  background: var(--border);
}
.step-card {
  display: flex; flex-direction: column; align-items: center;
  text-align: center; padding: 0 var(--s2);
  counter-increment: step;
}
/* Number is now inside the ring */
.step-card__num { display: none; }
.step-card__num-ring {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--surf-1);
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  position: relative; z-index: 1; margin-bottom: var(--s3);
  transition: background var(--t2), border-color var(--t2), box-shadow var(--t2);
}
.step-card__num-ring::after {
  content: counter(step, decimal-leading-zero);
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: var(--fs-20); font-weight: 800;
  color: var(--ink); letter-spacing: -.02em;
  line-height: 1;
}
.step-card__num-ring svg { display: none; }
.step-card:hover .step-card__num-ring {
  background: var(--orange); border-color: var(--orange);
  box-shadow: 0 4px 16px rgba(255,85,36,.25);
}
.step-card:hover .step-card__num-ring::after { color: #fff; }
.step-card__title { font-size: var(--fs-16); font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.step-card__body  { font-size: var(--fs-14); line-height: 1.75; color: var(--ink-2); }

/* ════════════════════════════════════════════
   USE CASES
════════════════════════════════════════════ */
.usecase__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.uc-card {
  background: var(--surf-1); border: 1px solid var(--border);
  border-radius: var(--r12); overflow: hidden;
  transition: border-color var(--t2), box-shadow var(--t2), transform var(--t3);
}
.uc-card:hover {
  border-color: var(--ink-5); box-shadow: var(--sh-2);
  transform: translateY(-4px);
}
.uc-card__head {
  height: 120px; background: var(--surf-3);
  display: flex; align-items: center; justify-content: center;
  border-bottom: 1px solid var(--border-2); color: var(--ink-3);
  transition: background var(--t2), color var(--t2);
}
.uc-card:hover .uc-card__head { background: var(--orange-s); color: var(--orange); }
.uc-card__body { padding: 20px; }
.uc-card__tag {
  font-family: 'DM Mono', monospace;
  font-size: var(--fs-11); font-weight: 500; letter-spacing: .07em;
  text-transform: uppercase; color: var(--ink-3);
  margin-bottom: 8px;
}
.uc-card__title { font-size: var(--fs-16); font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.uc-card__desc { font-size: var(--fs-14); line-height: 1.75; color: var(--ink-2); }

/* ════════════════════════════════════════════
   SOCIAL PROOF
════════════════════════════════════════════ */
.proof__metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  margin-bottom: var(--s8);
}
.metric-card {
  background: var(--surf-1); border: 1px solid var(--border);
  border-radius: var(--r12); padding: var(--s4); text-align: center;
}
.metric-card__num {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: clamp(36px, 3.5vw, 48px);
  font-weight: 800; letter-spacing: -.04em; line-height: 1;
  color: var(--ink);
}
.metric-card__num em { font-style: normal; color: var(--orange); }
.metric-card__lbl {
  font-size: var(--fs-14); color: var(--ink-3); margin-top: 10px;
}

.proof__testi-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.testi-card {
  background: var(--surf-1); border: 1px solid var(--border);
  border-radius: var(--r12); padding: var(--s4);
  transition: box-shadow var(--t2);
}
.testi-card:hover { box-shadow: var(--sh-2); }
.testi-stars { display: flex; gap: 3px; margin-bottom: var(--s2); }
.testi-star  { color: #F59E0B; }
.testi-star--empty { color: #D1D5DB; }
.testi-text  {
  font-size: var(--fs-15); line-height: 1.8; color: var(--ink-2);
  margin-bottom: var(--s3);
  font-style: normal;
}
.testi-author { display: flex; align-items: center; gap: 12px; }
.testi-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--surf-3); border: 1px solid var(--border-2);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-4);
}
.testi-name { font-size: var(--fs-14); font-weight: 700; color: var(--ink); }
.testi-role { font-size: var(--fs-13); color: var(--ink-3); margin-top: 2px; }

/* ════════════════════════════════════════════
   FAQ
════════════════════════════════════════════ */
.faq__list { max-width: 720px; margin: var(--s8) auto 0; }
.faq-item { border-bottom: 1px solid var(--border-2); }
.faq-item:first-child { border-top: 1px solid var(--border-2); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 20px 0;
  font-size: var(--fs-16); font-weight: 600; color: var(--ink);
  text-align: left; gap: var(--s3);
  transition: color var(--t1);
}
.faq-q:hover { color: var(--orange); }
.faq-chevron {
  width: 24px; height: 24px; flex-shrink: 0;
  color: var(--ink-4);
  transition: transform var(--t2), color var(--t2);
}
.faq-q[aria-expanded="true"] .faq-chevron { transform: rotate(180deg); color: var(--orange); }
.faq-a {
  font-size: var(--fs-15); color: var(--ink-2); line-height: 1.8;
  padding-right: var(--s6);
  overflow: hidden;
  max-height: 0;
  transition: max-height .3s ease, padding-bottom .3s ease;
  padding-bottom: 0;
}
.faq-a[aria-hidden="false"] {
  max-height: 300px;
  padding-bottom: 20px;
}

/* ════════════════════════════════════════════
   FINAL CTA
════════════════════════════════════════════ */
.cta-final { text-align: center; position: relative; overflow: hidden; }
.cta-final__bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(circle, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 32px 32px;
}
.cta-final__inner { position: relative; }
.cta-final__eyebrow { margin-bottom: var(--s3); }
.cta-final__h2 {
  font-family: 'Hanken Grotesk', 'Noto Sans JP', sans-serif;
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 800; color: #fff;
  letter-spacing: -.025em; line-height: 1.1;
  margin-bottom: var(--s3);
}
.cta-final__sub {
  font-size: var(--fs-18); color: rgba(255,255,255,.65);
  max-width: 480px; margin: 0 auto var(--s5); line-height: 1.8;
}
.cta-final__btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cta-final__note {
  margin-top: var(--s3);
  font-family: 'DM Mono', monospace;
  font-size: var(--fs-13); color: rgba(255,255,255,.4);
  letter-spacing: .06em;
}
.cta-final__trust {
  margin-top: var(--s6);
  display: flex; gap: var(--s5); justify-content: center; flex-wrap: wrap;
  padding-top: var(--s5); border-top: 1px solid rgba(255,255,255,.07);
}
.cta-trust-item {
  display: flex; align-items: center; gap: 8px;
  font-size: var(--fs-14); color: rgba(255,255,255,.55);
}
.cta-trust-item svg { color: rgba(255,255,255,.35); }

/* ════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════ */
.footer {
  background: var(--dark);
  border-top: 1px solid rgba(255,255,255,.06);
  padding: var(--s8) 0 var(--s5);
}
.footer__inner {
  display: grid; grid-template-columns: 2.2fr 1fr 1fr 1fr;
  gap: var(--s8); margin-bottom: var(--s8);
}
.footer__brand-name {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: 16px; font-weight: 800; color: #fff;
  letter-spacing: -.02em; margin-bottom: var(--s2);
}
.footer__brand-name em { font-style: normal; color: var(--orange); }
.footer__brand-desc {
  font-size: var(--fs-14); color: rgba(255,255,255,.5);
  line-height: 1.75; margin-bottom: var(--s3);
}
.footer__address {
  font-size: var(--fs-12); color: rgba(255,255,255,.3);
  line-height: 1.9; font-style: normal;
}
.footer-col h5 {
  font-family: 'DM Mono', monospace;
  font-size: var(--fs-12); font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; color: rgba(255,255,255,.45);
  margin-bottom: var(--s2);
}
.footer-col a {
  display: block; font-size: var(--fs-14);
  color: rgba(255,255,255,.55);
  margin-bottom: 10px;
  transition: color var(--t1);
}
.footer-col a:hover { color: rgba(255,255,255,.9); }
.footer__bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: var(--s4); border-top: 1px solid rgba(255,255,255,.06);
  font-size: var(--fs-13); color: rgba(255,255,255,.35);
}

/* ════════════════════════════════════════════
   STICKY CTA
════════════════════════════════════════════ */
.sticky-fab {
  position: fixed; bottom: 24px; right: 24px; z-index: 800;
  opacity: 1; transition: opacity var(--t2);
}
.sticky-fab.hidden { opacity: 0; pointer-events: none; }
.sticky-fab a {
  display: flex; align-items: center; gap: 8px;
  background: var(--dark); color: #fff;
  border: 1px solid rgba(255,255,255,.1);
  padding: 12px 20px; border-radius: 32px;
  font-size: var(--fs-14); font-weight: 700;
  box-shadow: var(--sh-3);
  transition: background var(--t1), border-color var(--t1);
}
.sticky-fab a:hover { background: var(--dark-3); border-color: rgba(255,255,255,.18); }

/* ════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════ */
@media (max-width: 960px) {
  .nav__links           { display: none; }
  .nav__actions .btn--ghost { display: none; }
  .nav__toggle          { display: flex; }

  /* Mobile menu open state */
  .nav__links.is-open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--surf-1);
    border-bottom: 1px solid var(--border-2);
    padding: var(--s2) var(--s3) var(--s3);
    gap: 0;
    box-shadow: var(--sh-2);
  }
  .nav__links.is-open a {
    display: block; padding: 14px 0;
    font-size: var(--fs-15);
    border-bottom: 1px solid var(--border-2);
  }
  .nav__links.is-open a:last-child { border-bottom: none; }

  .hero__inner          { grid-template-columns: 1fr; }
  .hero__content        { padding-bottom: var(--s5); }
  .hero__visual         { max-width: 480px; margin: 0 auto; }
  .solution__inner      { grid-template-columns: 1fr; }
  .benefits__grid       { grid-template-columns: repeat(2, 1fr); }
  .features__layout     { grid-template-columns: 1fr; }
  .feature-tabs         { flex-direction: row; overflow-x: auto; position: static; flex-wrap: nowrap; gap: 8px; padding-bottom: 4px; }
  .ftab                 { flex-shrink: 0; }
  .how__steps           { grid-template-columns: repeat(2, 1fr); gap: var(--s4); }
  .how__steps::before   { display: none; }
  .usecase__grid        { grid-template-columns: repeat(2, 1fr); }
  .proof__metrics       { grid-template-columns: repeat(2, 1fr); }
  .proof__testi-grid    { grid-template-columns: 1fr; }
  .arch__diagram        { grid-template-columns: 1fr; }
  .arch-col             { border-right: none; border-bottom: 1px solid var(--border-2); }
  .arch-col:last-child  { border-bottom: none; }
  .footer__inner        { grid-template-columns: 1fr 1fr; }
  .problem__grid        { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .sec                  { padding: var(--s8) 0; }
  .hero                 { padding: var(--s6) 0 var(--s5); }
  .hero__h1 .jp         { font-size: clamp(32px, 9vw, 44px); line-height: 1.15; }
  .hero__h1 .en         { font-size: 13px; margin-top: var(--s1); }
  .hero__body           { font-size: var(--fs-16); }
  .hero__stats          { gap: var(--s3); flex-wrap: wrap; }
  .hero__ctas           { flex-direction: column; }
  .hero__ctas .btn      { width: 100%; justify-content: center; }
  .benefits__grid       { grid-template-columns: 1fr; }
  .usecase__grid        { grid-template-columns: 1fr; }
  .proof__metrics       { grid-template-columns: 1fr; }
  .fpanel__checks       { grid-template-columns: 1fr; }
  .fpanel__stats        { flex-direction: column; }
  .footer__inner        { grid-template-columns: 1fr; }
  .footer__bottom       { flex-direction: column; gap: 8px; text-align: center; }
  .cta-final__btns      { flex-direction: column; align-items: center; }
  .cta-final__btns .btn { width: 100%; justify-content: center; }
  .cta-final__trust     { gap: var(--s3); }
  .trust__chip          { padding: 8px 14px 8px 8px; }
  .trust__chip-ico      { width: 32px; height: 32px; }
  .trust__chip-name     { font-size: var(--fs-13); }
  .sol-ring-wrap        { flex-direction: column; text-align: center; }
  .sol-stats            { grid-template-columns: 1fr; }
  .sticky-fab           { bottom: 16px; right: 16px; }
}