/* =========================================================================
   案B — ダーク開幕・横の流れ
   ========================================================================= */

/* ---------- §1 hero (dark) ---------- */
.vb-hero {
  position: relative; padding: 96px 0 88px;
  background: var(--gradient-hero-dark); color: #fff;
  overflow: hidden;
}
.vb-hero .container { position: relative; z-index: 1; }

/* 背景の漂う光 — ロゴのシアン/パープルを低彩度でゆっくり動かす(大胆モードでは振幅増) */
.vb-hero__bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.vb-hero__bg .g { position: absolute; border-radius: 50%; will-change: transform; }
.vb-hero__bg .g--cyan {
  width: 920px; height: 720px; top: -300px; left: -200px;
  background: radial-gradient(closest-side, rgba(30, 181, 220, 0.20), transparent 72%);
  animation: vb-drift-a 19s var(--ease-in-out) infinite alternate;
}
.vb-hero__bg .g--purple {
  width: 840px; height: 700px; bottom: -320px; right: -240px;
  background: radial-gradient(closest-side, rgba(132, 35, 189, 0.22), transparent 72%);
  animation: vb-drift-b 24s var(--ease-in-out) infinite alternate;
}
.vb-hero__bg .g--blue {
  width: 560px; height: 480px; top: 12%; right: 18%;
  background: radial-gradient(closest-side, rgba(61, 77, 198, 0.16), transparent 72%);
  animation: vb-drift-c 28s var(--ease-in-out) infinite alternate;
}
@keyframes vb-drift-a {
  from { transform: translate3d(0, 0, 0) scale(1); opacity: 0.75; }
  to   { transform: translate3d(130px, 70px, 0) scale(1.12); opacity: 1; }
}
@keyframes vb-drift-b {
  from { transform: translate3d(0, 0, 0) scale(1.08); opacity: 1; }
  to   { transform: translate3d(-150px, -80px, 0) scale(0.94); opacity: 0.7; }
}
@keyframes vb-drift-c {
  from { transform: translate3d(0, 0, 0); opacity: 0.5; }
  to   { transform: translate3d(-90px, 60px, 0); opacity: 0.9; }
}
.vb-hero--still .vb-hero__bg .g { animation: none; }
.vb-hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
@media (prefers-reduced-motion: reduce) {
  .vb-hero__bg .g { animation: none; }
}

.vb-hero__eyebrow {
  font-family: var(--font-display); font-weight: 600; font-size: 12px;
  letter-spacing: var(--tracking-eyebrow); text-transform: uppercase; color: var(--cyan-400);
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(34, 211, 238, 0.35);
  padding: 6px 14px; border-radius: var(--radius-full);
}
.vb-hero__h {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(42px, 5.2vw, 68px);
  line-height: 1.16; letter-spacing: -0.03em; color: #fff;
  margin: 26px 0 22px; max-width: 16em;
}
.vb-hero__sub { font-size: 16.5px; line-height: 1.95; color: var(--fg-on-dark-2); max-width: 70ch; margin: 0; }
.vb-hero__ctas { display: flex; gap: 12px; margin-top: 34px; align-items: center; flex-wrap: wrap; }
.vb-hero__note { font-size: 13px; color: var(--fg-on-dark-3); margin: 14px 0 0; }

/* FlowFour — 横の一筆書き */
.vb-flow { position: relative; margin-top: 72px; }
.vb-flow__line { position: absolute; top: -26px; left: 2%; width: 96%; height: 14px; }
.vb-flow__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.vb-flow__item {
  position: relative;
  background: rgba(255,255,255,0.05); border: 1px solid var(--border-on-dark);
  border-radius: var(--radius-lg); padding: 20px 22px;
  transition: opacity 400ms var(--ease-out);
}
.vb-flow__item::before {
  content: ""; position: absolute; top: -31px; left: calc(50% - 5px);
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--cyan-400);
}
.vb-flow__item .step { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--cyan-400); }
.vb-flow__item .t { font-family: var(--font-display); font-weight: 700; font-size: 16.5px; color: #fff; margin-top: 5px; letter-spacing: -0.01em; }
.vb-flow__item .d { font-size: 12.5px; color: var(--fg-on-dark-2); line-height: 1.65; margin-top: 5px; }

/* ---------- §1.5 pickup ---------- */
.vb-pickup { padding: var(--section-y-sm) 0 0; }
.vb-pickup__card {
  position: relative;
  display: flex; align-items: center; gap: 36px;
  background: #fff; border: 1px solid var(--border-1);
  border-radius: var(--radius-lg); padding: 30px 36px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.vb-pickup__card > div:first-child { flex: 1 1 auto; min-width: 0; }
.vb-pickup__cta { display: flex; align-items: center; }
.vb-pickup__card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-brand);
}
.vb-pickup__eyebrow {
  font-family: var(--font-display); font-weight: 600; font-size: 11px;
  letter-spacing: var(--tracking-eyebrow); text-transform: uppercase; color: var(--blue-600);
}
.vb-pickup__title {
  font-family: var(--font-display); font-weight: 700; font-size: 20px;
  letter-spacing: -0.01em; margin: 7px 0 8px; color: var(--navy-900);
}
.vb-pickup__desc { font-size: 13.5px; line-height: 1.75; color: var(--ink-600); margin: 0; max-width: 64ch; white-space: pre-line; }
.vb-pickup__cta { flex-shrink: 0; }

/* ---------- §2 ledger (対面パネル) ---------- */
.vb-ledger__panels { display: grid; grid-template-columns: 1fr 64px 1fr; align-items: stretch; }
.vb-ledger__panel { border-radius: var(--radius-xl); padding: 28px 32px; }
.vb-ledger__panel--genba { background: #fff; border: 1px solid var(--border-1); box-shadow: var(--shadow-sm); }
.vb-ledger__panel--keiei { background: var(--navy-900); color: #fff; }
.vb-ledger__panel-label {
  font-family: var(--font-display); font-weight: 600; font-size: 12px;
  letter-spacing: var(--tracking-eyebrow); text-transform: uppercase;
  padding-bottom: 14px; margin-bottom: 4px; border-bottom: 1px solid var(--border-2);
  color: var(--ink-500);
}
.vb-ledger__panel--keiei .vb-ledger__panel-label { color: var(--cyan-400); border-color: var(--border-on-dark); }
.vb-ledger__cell {
  min-height: 76px; display: flex; align-items: center; gap: 14px;
  border-bottom: 1px solid var(--border-2);
  font-size: 15px; line-height: 1.6; color: var(--ink-700);
}
.vb-ledger__cell:last-child { border-bottom: none; }
.vb-ledger__cell .idx { font-family: var(--font-mono); font-size: 12px; color: var(--ink-400); flex-shrink: 0; }
.vb-ledger__panel--keiei .vb-ledger__cell {
  border-color: var(--border-on-dark); color: #fff;
  font-family: var(--font-display); font-weight: 600; letter-spacing: -0.005em;
}
.vb-ledger__arrows { display: flex; flex-direction: column; padding-top: 47px; }
.vb-ledger__arrows .a {
  height: 76px; display: grid; place-items: center; color: var(--blue-500);
}
.vb-ledger__close {
  margin-top: 32px; font-size: 16px; color: var(--navy-900); font-weight: 500; text-align: center;
}

/* ---------- §3 statement (中央) ---------- */
.vb-statement { text-align: center; }
.vb-statement__vertical {
  writing-mode: vertical-rl; text-orientation: mixed;
  font-family: var(--font-mincho); font-weight: 600;
  font-size: 22px; letter-spacing: 0.4em; color: var(--blue-600);
  margin: 0 auto 36px; height: max-content; display: inline-block;
  padding-bottom: 0.4em;
}
.vb-statement__h {
  font-family: var(--font-mincho); font-weight: 600;
  font-size: clamp(26px, 3vw, 38px); line-height: 1.6; letter-spacing: 0.02em;
  color: var(--navy-900); margin: 0 auto 24px; max-width: 26em;
}
.vb-statement__body {
  font-size: 15.5px; line-height: 2.1; color: var(--ink-700);
  max-width: 52em; margin: 0 auto; text-align: left;
}

/* ---------- §4 products (全幅行) ---------- */
.vb-prods__rows { display: flex; flex-direction: column; gap: 16px; }
.vb-prod {
  display: grid; grid-template-columns: 250px 1fr 320px; gap: 32px; align-items: center;
  background: #fff; border: 1px solid var(--border-1); border-radius: var(--radius-lg);
  padding: 28px 32px; box-shadow: var(--shadow-sm);
  transition: all var(--duration-base) var(--ease-out);
}
.vb-prod:hover { border-color: var(--blue-100); box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.vb-prod__id { display: flex; align-items: center; gap: 14px; }
.vb-prod__desc { font-size: 14px; color: var(--ink-700); line-height: 1.75; margin: 0; }
.vb-prod .value-pair { margin-top: 0; padding-top: 0; border-top: none; border-left: 1px solid var(--border-2); padding-left: 28px; }
.vb-prods__services { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.vb-prods__note { margin-top: 28px; text-align: center; }

/* ---------- §5 dev (dark, 2col) ---------- */
.vb-dev__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: start; }
.vb-dev__quote {
  font-family: var(--font-mincho); font-weight: 600;
  font-size: clamp(19px, 2vw, 24px); line-height: 1.8; color: #fff;
  letter-spacing: 0.02em; margin: 40px 0 0;
  padding-left: 20px; border-left: 2px solid var(--cyan-400);
}
.vb-dev__link { margin-top: 28px; font-size: 14px; color: var(--fg-on-dark-2); }
.vb-dev__link a { color: var(--cyan-400); font-weight: 600; margin-left: 8px; }
.vb-cycle { position: relative; display: flex; flex-direction: column; gap: 0; padding-left: 40px; }
.vb-cycle__line { position: absolute; left: 11px; top: 14px; width: 14px; height: calc(100% - 14px); }
.vb-cycle__item { position: relative; padding: 0 0 26px; }
.vb-cycle__item::before {
  content: ""; position: absolute; left: -36px; top: 7px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--cyan-400);
}
.vb-cycle__item .row { display: flex; align-items: baseline; gap: 12px; }
.vb-cycle__item .n { font-family: var(--font-mono); font-size: 11px; color: var(--cyan-400); letter-spacing: 0.1em; }
.vb-cycle__item .t { font-family: var(--font-display); font-weight: 700; font-size: 16.5px; color: #fff; letter-spacing: -0.01em; }
.vb-cycle__item .d { font-size: 13px; color: var(--fg-on-dark-2); margin-top: 3px; }
.vb-cycle__loop {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; color: var(--fg-on-dark-3);
}

/* ---------- §6 personas (2x2) ---------- */
.vb-personas__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.vb-persona {
  background: #fff; border: 1px solid var(--border-1); border-radius: var(--radius-lg);
  padding: 28px 30px; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; gap: 12px;
  transition: all var(--duration-base) var(--ease-out);
}
.vb-persona:hover { border-color: var(--blue-100); box-shadow: var(--shadow-lg); }
.vb-persona__head { display: flex; align-items: center; gap: 10px; }
.vb-persona__icon {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  background: var(--blue-50); color: var(--blue-600); flex-shrink: 0;
}
.vb-persona__label { font-family: var(--font-display); font-weight: 600; font-size: 13px; color: var(--ink-500); }
.vb-persona__quote {
  font-family: var(--font-display); font-weight: 700; font-size: 17.5px;
  line-height: 1.55; color: var(--navy-900); letter-spacing: -0.01em; margin: 0;
}
.vb-persona__body { font-size: 14px; color: var(--ink-600); line-height: 1.7; margin: 0; }
.vb-persona__chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: auto; padding-top: 10px; }

/* ---------- §7 steps (横・番号大) ---------- */
.vb-steps__row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border-top: 1px solid var(--border-strong); }
.vb-steps__item { padding: 26px 22px 8px; border-left: 1px solid var(--border-2); }
.vb-steps__item:first-child { border-left: none; padding-left: 0; }
.vb-steps__num {
  font-family: var(--font-display); font-weight: 700; font-size: 34px;
  letter-spacing: -0.02em; color: var(--ink-200);
}
.vb-steps__t { font-family: var(--font-display); font-weight: 700; font-size: 15.5px; color: var(--navy-900); margin-top: 8px; letter-spacing: -0.01em; }

/* ---------- §8 final (dark band 到達点) ---------- */
.vb-final-spine { text-align: center; padding: 24px 0 0; }
.vb-final-spine svg { width: 12px; height: 100px; margin: 0 auto; display: block; }
.vb-final {
  background: var(--gradient-hero-dark); color: #fff;
  padding: 80px 0 88px; text-align: center;
}
.vb-final__h {
  font-family: var(--font-mincho); font-weight: 600;
  font-size: clamp(26px, 3vw, 38px); line-height: 1.6; letter-spacing: 0.02em;
  color: #fff; margin: 0 0 18px;
}
.vb-final__body { font-size: 15px; line-height: 2; color: var(--fg-on-dark-2); max-width: 36em; margin: 0 auto; }
.vb-final__ctas { margin-top: 34px; display: flex; gap: 12px; justify-content: center; }

/* ---------- responsive (案B) ---------- */
@media (max-width: 1020px) {
  .vb-flow__grid { grid-template-columns: 1fr 1fr; }
  .vb-flow__line, .vb-flow__item::before { display: none; }
  .vb-prod { grid-template-columns: 1fr; gap: 16px; }
  .vb-prod .value-pair { border-left: none; padding-left: 0; border-top: 1px solid var(--border-2); padding-top: 14px; }
  .vb-dev__inner { grid-template-columns: 1fr; gap: 48px; }
}
@media (max-width: 720px) {
  .vb-flow__grid { grid-template-columns: 1fr; }
  .vb-pickup__card { flex-direction: column; align-items: flex-start; gap: 18px; }
  .vb-ledger__panels { grid-template-columns: 1fr; gap: 16px; }
  .vb-ledger__arrows { display: none; }
  .vb-ledger__cell { min-height: 0; padding: 14px 0; }
  .vb-prods__services { grid-template-columns: 1fr; }
  .vb-personas__grid { grid-template-columns: 1fr; }
  .vb-steps__row { grid-template-columns: 1fr; border-top: none; }
  .vb-steps__item { border-left: none; border-top: 1px solid var(--border-2); padding: 16px 0 8px; display: flex; align-items: baseline; gap: 14px; }
  .vb-steps__num { font-size: 24px; }
  .vb-final__ctas { flex-direction: column; align-items: center; }
}