:root {
  --ink: #101820;
  --ink-soft: #35414b;
  --paper: #f4f1e9;
  --white: #fffdf8;
  --line: rgba(16, 24, 32, 0.16);
  --blue: #2c8fbc;
  --blue-pale: #dff3fb;
  --red: #cf2026;
  --red-pale: #fff0ed;
  --lime: #d9ff52;
  --shell: min(1180px, calc(100vw - 48px));
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans JP", sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
img { display: block; max-width: 100%; height: auto; }
.shell { width: var(--shell); margin: 0 auto; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  border-bottom: 1px solid rgba(255,255,255,.16);
  color: white;
  transition: background .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.site-header.is-scrolled {
  border-bottom-color: rgba(255,255,255,.08);
  background: rgba(16,24,32,.9);
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.header-inner { height: 84px; display: flex; align-items: center; justify-content: space-between; }
.wordmark { display: inline-flex; align-items: center; gap: 12px; font-family: Manrope, sans-serif; font-weight: 800; }
.wordmark-mark { display: grid; place-items: center; width: 42px; height: 42px; }
.brand-symbol::before {
  content: "";
  display: block;
  width: 38px;
  height: 38px;
  background: var(--lime);
  -webkit-mask: url("../images/common/brand-favicon.png") center / contain no-repeat;
  mask: url("../images/common/brand-favicon.png") center / contain no-repeat;
}
.wordmark-text { font-size: 1rem; letter-spacing: -.02em; }
.desktop-nav { display: flex; align-items: center; gap: 30px; font-family: Manrope, sans-serif; font-size: .83rem; font-weight: 700; }
.desktop-nav a:not(.nav-cta) { opacity: .82; }
.nav-cta { padding: 12px 18px; border-radius: 999px; color: var(--ink); background: var(--lime); }
.menu-toggle { display: none; }

.hero { position: relative; overflow: hidden; min-height: 840px; color: white; background: var(--ink); }
.hero-grid-bg { position: absolute; inset: 0; opacity: .16; background-image: linear-gradient(rgba(255,255,255,.2) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.2) 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(to bottom, black, transparent 82%); }
.hero::after { content: ""; position: absolute; width: 520px; height: 520px; right: -120px; top: 80px; border: 1px solid rgba(217,255,82,.34); border-radius: 50%; box-shadow: 0 0 0 80px rgba(217,255,82,.03), 0 0 0 160px rgba(217,255,82,.025); }
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(440px, .9fr); gap: 46px; align-items: center; min-height: 840px; padding: 138px 0 72px; }
.hero-kicker { display: flex; align-items: center; gap: 10px; margin: 0 0 13px; font-family: Manrope, sans-serif; font-size: .6rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: #c9d3d9; }
.hero-kicker span { width: 26px; height: 2px; background: var(--lime); }
.hero-trust { display: flex; align-items: center; gap: 10px; margin: 0 0 30px; color: #f2f5f7; font-size: .8rem; font-weight: 700; letter-spacing: .04em; }
.hero-trust i { color: var(--lime); font-style: normal; }
.hero h1 { max-width: 680px; margin: 0; font-size: clamp(2.8rem, 3.85vw, 3.55rem); line-height: 1.28; letter-spacing: -.05em; font-weight: 800; }
.hero h1 > span { display: block; white-space: nowrap; }
.hero-title-primary > span + span { margin-left: .24em; }
.hero h1 em { color: var(--lime); font-style: normal; }
.hero-lead { max-width: 640px; margin: 30px 0 0; color: #e1e6ed; font-size: 1.04rem; font-weight: 500; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 54px; padding: 0 24px; border: 1px solid transparent; border-radius: 999px; font-weight: 700; }
.button-primary { background: var(--lime); color: var(--ink); }
.button-ghost { border-color: #fff; color: #fff; background: rgba(255,255,255,.04); font-weight: 800; }
.button-ghost:hover { color: var(--ink); background: white; }
.hero-products { position: relative; min-height: 500px; }
.hero-product { position: absolute; overflow: hidden; border: 1px solid rgba(255,255,255,.22); box-shadow: 0 30px 80px rgba(0,0,0,.38); cursor: pointer; transition: transform .25s cubic-bezier(.2,.75,.2,1), box-shadow .25s ease; }
.hero-product:focus-visible { outline: 3px solid var(--lime); outline-offset: 6px; }
.hero-product-misemaru { z-index: 1; display: grid; grid-template-columns: 152px 1fr; align-items: center; gap: 18px; width: 80%; top: 16%; left: 1%; padding: 20px 22px; border-radius: 18px; transform: rotate(3.2deg); color: var(--ink); background: #e4f7fd; }
.misemaru-visual { display: grid; place-items: center; width: 152px; height: 106px; border-radius: 14px; background: transparent; }
.misemaru-visual img { width: 144px; height: 100px; object-fit: contain; transform: scale(1.08); }
.misemaru-card-copy { display: flex; flex-direction: column; gap: 9px; }
.hero-product-misemaru p, .hero-product-akamain p { margin: 0; font-family: Manrope, sans-serif; font-size: .58rem; font-weight: 800; letter-spacing: .08em; }
.hero-product-misemaru span { color: #4d6874; font-size: .76rem; }
.device-notch { position: absolute; z-index: 2; top: 4px; left: 50%; width: 38%; height: 10px; border-radius: 0 0 8px 8px; background: #111b22; transform: translateX(-50%); }
.hero-product-akamain { z-index: 2; display: grid; grid-template-columns: 120px 1fr; align-items: center; gap: 18px; width: 80%; right: 4%; bottom: 0; padding: 20px 22px; border-radius: 18px; transform: rotate(-3.2deg); color: var(--ink); background: var(--red-pale); }
.akamain-visual { display: grid; place-items: center; width: 120px; height: 106px; border-radius: 14px; background: white; }
.akamain-visual img { width: 110px; }
.hero-product-akamain h2 { margin: 6px 0 3px; font-size: 1.6rem; white-space: nowrap; }
.hero-product-akamain h2 b { color: var(--red); }
.hero-product-akamain span { color: #645b59; font-size: .76rem; }

@media (hover: hover) and (pointer: fine) {
  .hero-product:hover { box-shadow: 0 38px 88px rgba(0,0,0,.48); }
  .hero-product-misemaru:hover { transform: translateY(-10px) rotate(3.2deg); }
  .hero-product-akamain:hover { transform: translateY(-10px) rotate(-3.2deg); }
}
.hero-product-misemaru:focus-visible { transform: translateY(-10px) rotate(3.2deg); }
.hero-product-akamain:focus-visible { transform: translateY(-10px) rotate(-3.2deg); }

.intro-strip { padding: 36px 0; border-bottom: 1px solid var(--line); background: var(--lime); }
.intro-strip-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.intro-strip p { margin: 0; font-size: .82rem; font-weight: 700; }
.intro-strip h2 { margin: 0; font-size: clamp(1rem, 2vw, 1.35rem); }
.section { padding: 116px 0; }
.section-heading { display: grid; grid-template-columns: 1fr 2fr; gap: 40px; align-items: start; margin-bottom: 52px; }
.section-index { margin: 8px 0 0; font-family: Manrope, sans-serif; font-size: .72rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.section-heading h2 { margin: 0; font-size: clamp(2.1rem, 4vw, 3.6rem); line-height: 1.35; letter-spacing: -.045em; }
.section-description { max-width: 660px; margin: 22px 0 0; color: var(--ink-soft); line-height: 2; }
.case-study { overflow: hidden; margin-top: 28px; border: 1px solid var(--line); border-radius: 30px; background: var(--white); }
.case-study + .case-study { margin-top: 34px; }
.case-topline { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 28px; border-bottom: 1px solid var(--line); }
.case-topline p { display: flex; align-items: center; gap: 18px; margin: 0; font-family: Manrope, sans-serif; color: #5c6770; font-size: .68rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.case-number { color: var(--ink); }
.text-link { display: inline-flex; align-items: center; gap: 14px; padding-bottom: 3px; border-bottom: 1px solid currentColor; font-family: Manrope, sans-serif; font-size: .78rem; font-weight: 800; }
.case-grid { display: grid; grid-template-columns: .84fr 1.16fr; gap: 40px; padding: 62px 56px 58px; }
.case-grid-reverse { grid-template-columns: .88fr 1.12fr; }
.case-brand { display: flex; align-items: center; gap: 18px; }
.case-brand img { width: 72px; height: 72px; object-fit: contain; border-radius: 17px; }
.case-brand p { margin: 0 0 4px; color: #68737a; font-size: .7rem; font-weight: 700; letter-spacing: .05em; }
.case-brand h3 { margin: 0; font-size: clamp(1.7rem, 2.6vw, 2.5rem); line-height: 1.2; letter-spacing: -.04em; }
.akamain-brand img { background: white; }
.akamain-brand h3 b { color: var(--red); }
.case-lead { margin: 30px 0 0; font-size: 1.02rem; font-weight: 600; line-height: 2; }
.case-problem { margin-top: 30px; padding: 22px 24px; border-left: 3px solid var(--blue); background: var(--blue-pale); }
.case-akamain .case-problem { border-left-color: var(--red); background: var(--red-pale); }
.case-problem span { display: block; margin-bottom: 8px; font-size: .68rem; font-weight: 800; letter-spacing: .08em; }
.case-problem p { margin: 0; color: var(--ink-soft); font-size: .83rem; line-height: 1.9; }
.feature-list { margin: 28px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.feature-list li { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: .82rem; font-weight: 600; }
.feature-list li span { font-family: Manrope, sans-serif; color: var(--blue); font-size: .66rem; font-weight: 800; }
.case-akamain .feature-list li span { color: var(--red); }
.case-media { position: relative; min-height: 570px; border-radius: 22px; }
.misemaru-media { overflow: hidden; padding: 28px; background: linear-gradient(150deg, #eaf8fd 0%, #c7ecf8 56%, #a9ddec 100%); }
.misemaru-media::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(44,143,188,.075) 1px, transparent 1px), linear-gradient(90deg, rgba(44,143,188,.075) 1px, transparent 1px); background-size: 34px 34px; }
.device-caption { position: absolute; z-index: 5; display: flex; align-items: baseline; gap: 7px; padding: 7px 10px; border-radius: 9px; color: white; background: #172c37; box-shadow: 0 8px 20px rgba(31,75,95,.18); }
.device-caption span { font-size: .5rem; font-weight: 700; opacity: .72; }
.device-caption b { font-size: .68rem; }
.pc-caption { top: 27px; left: 29px; }
.mobile-caption { right: 17px; bottom: 344px; }
.misemaru-pc-device { position: absolute; z-index: 1; top: 64px; right: 50px; left: 27px; aspect-ratio: 16 / 10; padding: 13px 10px 16px; border-radius: 17px; background: #18252e; box-shadow: 0 26px 58px rgba(31,95,126,.28); transform: rotate(-1deg); }
.pc-camera { position: absolute; top: 5px; left: 50%; width: 4px; height: 4px; border-radius: 50%; background: #5e6b72; transform: translateX(-50%); }
.misemaru-pc-screen { width: 100%; height: 100%; overflow: hidden; border-radius: 7px; background: #dff3fb; }
.misemaru-pc-screen img { width: 100%; height: 100%; object-fit: cover; }
.pc-stand { position: absolute; bottom: -28px; left: 50%; width: 25%; height: 28px; border-bottom: 7px solid #18252e; transform: translateX(-50%); }
.pc-stand::before { content: ""; position: absolute; top: 0; left: 50%; width: 16px; height: 23px; background: #18252e; transform: translateX(-50%); }
.misemaru-mobile-device { position: absolute; z-index: 3; right: 15px; bottom: 20px; width: 154px; height: 326px; overflow: hidden; padding: 10px 5px 6px; border: 7px solid #18252e; border-radius: 29px; background: #18252e; box-shadow: 0 22px 42px rgba(31,75,95,.34); transform: rotate(2.6deg); }
.misemaru-mobile-screen { width: 100%; height: 100%; overflow: hidden; border-radius: 17px; background: #f8f3e7; }
.misemaru-mobile-screen img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.akamain-media { display: grid; grid-template-rows: 1fr auto auto; gap: 16px; padding: 38px; color: var(--ink); background: #fff2ef; }
.akamain-media::before { content: ""; position: absolute; inset: 0; border-radius: inherit; background-image: linear-gradient(rgba(207,32,38,.07) 1px, transparent 1px), linear-gradient(90deg, rgba(207,32,38,.07) 1px, transparent 1px); background-size: 36px 36px; }
.akamain-poster, .training-flow, .review-axes { position: relative; z-index: 1; }
.akamain-poster { display: grid; place-items: center; align-content: center; min-height: 310px; padding: 24px; border: 1px solid rgba(207,32,38,.16); border-radius: 20px; background: rgba(255,255,255,.92); text-align: center; }
.akamain-poster img { width: min(230px, 58%); }
.akamain-poster h4 { margin: 4px 0 0; font-size: 2.45rem; line-height: 1; }
.akamain-poster h4 b { color: var(--red); }
.akamain-poster > span { margin-top: 10px; font-size: .76rem; font-weight: 700; }
.training-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: center; gap: 10px; }
.training-flow div { display: flex; align-items: center; gap: 8px; min-width: 0; padding: 10px; border-radius: 12px; background: white; font-size: .64rem; font-weight: 700; }
.training-flow img { width: 34px; height: 34px; object-fit: contain; }
.training-flow i { font-style: normal; color: var(--red); }
.review-axes { padding: 16px 18px; border-radius: 14px; color: white; background: #2a2221; }
.review-axes p { margin: 0 0 9px; font-family: Manrope, sans-serif; color: #ff928e; font-size: .58rem; font-weight: 800; letter-spacing: .12em; }
.review-axes div { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.review-axes span { padding: 5px 7px; border-radius: 6px; background: rgba(255,255,255,.09); font-size: .6rem; text-align: center; }
.case-footer { display: grid; grid-template-columns: .8fr 1.2fr; border-top: 1px solid var(--line); background: #faf8f2; }
.case-footer > div { padding: 22px 28px; }
.case-footer > div + div { border-left: 1px solid var(--line); }
.case-footer span { font-family: Manrope, sans-serif; color: #737d83; font-size: .58rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.case-footer p { margin: 6px 0 0; font-size: .72rem; font-weight: 600; line-height: 1.7; }

.capabilities { color: white; background: var(--ink); }
.section-heading-light .section-description { color: #adb8be; }
.capability-list { border-top: 1px solid rgba(255,255,255,.18); }
.capability-item { display: grid; grid-template-columns: 70px 1fr auto; gap: 28px; align-items: center; padding: 34px 8px; border-bottom: 1px solid rgba(255,255,255,.18); }
.capability-item > span { align-self: start; margin-top: 6px; font-family: Manrope, sans-serif; color: var(--lime); font-size: .68rem; font-weight: 800; }
.capability-item h3 { margin: 0; font-size: clamp(1.35rem, 2.4vw, 2rem); letter-spacing: -.025em; }
.capability-item p { max-width: 700px; margin: 10px 0 0; color: #d7dfe4; font-size: .86rem; font-weight: 500; line-height: 1.85; }
.capability-item > b { display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.3); border-radius: 50%; font-family: Manrope, sans-serif; font-size: .8rem; }

.approach-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.approach-grid li { min-height: 430px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.approach-grid span { display: inline-grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; font-family: Manrope, sans-serif; font-size: .65rem; font-weight: 800; }
.approach-art { width: min(174px, 100%); aspect-ratio: 1; margin: 12px auto 18px; background-image: url("images/approach-sprite.webp"); background-repeat: no-repeat; background-size: 200% auto; }
.approach-grid li:nth-child(1) .approach-art { background-position: 0 0; }
.approach-grid li:nth-child(2) .approach-art { background-position: 100% 0; }
.approach-grid li:nth-child(3) .approach-art { background-position: 0 100%; }
.approach-grid li:nth-child(4) .approach-art { background-position: 100% 100%; }
.approach-grid h3 { margin: 0 0 16px; font-size: 1.18rem; }
.approach-grid p { margin: 0; color: var(--ink-soft); font-size: .82rem; line-height: 1.9; }

.about { border-top: 1px solid var(--line); background: var(--white); }
.about-grid { display: grid; grid-template-columns: .84fr 1.16fr; gap: 90px; align-items: center; }
.about-photo { position: relative; width: min(440px, 100%); }
.about-photo::before { content: ""; position: absolute; inset: 22px -22px -22px 22px; background: var(--lime); }
.about-photo img { position: relative; z-index: 1; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; filter: saturate(.78) contrast(1.03); }
.about-photo > span { position: absolute; z-index: 2; right: -14px; bottom: 22px; padding: 10px 14px; color: white; background: var(--ink); font-family: Manrope, sans-serif; font-size: .58rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.about-copy h2 { margin: 22px 0 0; font-size: clamp(2.5rem, 4.7vw, 4.4rem); line-height: 1.28; letter-spacing: -.05em; }
.about-name { margin: 36px 0 20px !important; color: var(--ink) !important; font-weight: 800; }
.about-copy > p { max-width: 650px; margin: 0 0 16px; color: var(--ink-soft); line-height: 2.05; }
.about-values { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.about-values span { padding: 9px 13px; border: 1px solid var(--line); border-radius: 999px; font-family: Manrope, sans-serif; font-size: .64rem; font-weight: 800; }

.contact { color: white; background: #18252e; }
.contact-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 80px; }
.contact-copy { align-self: start; position: sticky; top: 120px; }
.contact-copy h2 { margin: 22px 0 0; font-size: clamp(2.5rem, 4.5vw, 4.3rem); line-height: 1.3; letter-spacing: -.05em; }
.contact-copy > p { max-width: 500px; margin: 26px 0 0; color: #dde4e8; font-weight: 500; line-height: 1.85; }
.contact-points { display: flex; flex-direction: column; gap: 11px; margin-top: 30px; }
.contact-points span { display: flex; align-items: center; gap: 10px; color: #dce2e5; font-size: .78rem; }
.contact-points span::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--lime); }
.line-link { display: inline-flex; align-items: center; gap: 28px; margin-top: 40px; padding-bottom: 8px; border-bottom: 1px solid #66757e; font-weight: 700; }
.contact-form { padding: 38px; border-radius: 26px; color: var(--ink); background: var(--white); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 22px; }
.form-field label { display: flex; align-items: center; justify-content: space-between; margin-bottom: 9px; font-size: .76rem; font-weight: 700; }
.form-field label span { color: var(--red); font-size: .6rem; }
.form-field input, .form-field select, .form-field textarea { width: 100%; border: 1px solid #d2d5d6; border-radius: 10px; outline: 0; color: var(--ink); background: white; transition: border-color .2s ease, box-shadow .2s ease; }
.form-field input, .form-field select { height: 52px; padding: 0 14px; }
.form-field textarea { min-height: 160px; padding: 14px; resize: vertical; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { border-color: #537080; box-shadow: 0 0 0 3px rgba(44,143,188,.12); }
.privacy-check { display: flex; align-items: center; gap: 10px; margin: 4px 0 20px; font-size: .72rem; }
.privacy-check input { width: 18px; height: 18px; accent-color: var(--ink); }
.privacy-check a { border-bottom: 1px solid currentColor; }
.honeypot { position: absolute; left: -10000px; opacity: 0; pointer-events: none; }
.form-submit { display: flex; align-items: center; justify-content: space-between; width: 100%; min-height: 58px; padding: 0 22px; border: 0; border-radius: 999px; color: var(--ink); background: var(--lime); font-weight: 800; cursor: pointer; }
.form-submit:disabled { cursor: wait; opacity: .65; }
.form-status { min-height: 1.5em; margin: 14px 0 0; font-size: .74rem; line-height: 1.7; }
.form-status.is-success { color: #187344; }
.form-status.is-error { color: #b5282d; }

.site-footer { padding: 72px 0 26px; color: white; background: #0b1116; }
.footer-main { display: grid; grid-template-columns: 1fr 1fr auto; gap: 40px; align-items: center; padding-bottom: 60px; }
.footer-wordmark { justify-self: start; }
.footer-main > p { margin: 0; color: #adb8be; font-size: .86rem; }
.footer-main nav { display: flex; gap: 24px; font-family: Manrope, sans-serif; font-size: .68rem; font-weight: 800; }
.footer-bottom { display: flex; justify-content: space-between; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.14); color: #76838b; font-family: Manrope, sans-serif; font-size: .62rem; }
.footer-bottom p { margin: 0; }
.footer-bottom p:last-child { display: flex; gap: 20px; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.75,.2,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (min-width: 981px) {
  .hero-product-misemaru { grid-template-columns: 190px 1fr; gap: 22px; width: 92%; top: 12%; padding: 25px 28px; }
  .misemaru-visual { width: 190px; height: 120px; }
  .misemaru-visual img { width: 178px; height: 116px; }
  .hero-product-misemaru span { font-size: .82rem; }
  .hero-product-akamain { grid-template-columns: 138px 1fr; gap: 22px; width: 92%; padding: 25px 28px; }
  .akamain-visual { width: 138px; height: 120px; }
  .akamain-visual img { width: 126px; }
  .hero-product-akamain h2 { font-size: 1.8rem; }
  .hero-product-akamain span { font-size: .82rem; }
}

@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; padding-top: 142px; }
  .hero-products { width: min(680px, 100%); margin: 0 auto; }
  .hero { min-height: auto; }
  .hero h1 > span { white-space: normal; }
  .menu-toggle { position: relative; z-index: 20; display: grid; place-content: center; gap: 5px; width: 44px; height: 44px; padding: 0; border: 1px solid rgba(255,255,255,.35); border-radius: 50%; color: white; background: transparent; }
  .menu-toggle span { width: 18px; height: 1px; background: currentColor; transition: transform .2s ease; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3px) rotate(-45deg); }
  .desktop-nav { position: fixed; inset: 0; z-index: 15; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 24px; padding: 24px max(7vw, 32px); visibility: hidden; opacity: 0; color: white; background: rgba(16,24,32,.98); transition: opacity .25s ease, visibility .25s ease; }
  .desktop-nav.is-open { visibility: visible; opacity: 1; }
  .desktop-nav a:not(.nav-cta) { display: block; font-size: 1.8rem; }
  .desktop-nav .nav-cta { margin-top: 14px; }
  .case-grid, .case-grid-reverse { grid-template-columns: 1fr; }
  .case-copy { max-width: 680px; }
  .case-media { min-height: 620px; }
  .approach-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { gap: 60px; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-copy { position: static; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .footer-main nav { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  :root { --shell: min(100% - 32px, 1180px); }
  .header-inner { height: 72px; }
  .wordmark-text { font-size: .9rem; }
  .nav-cta { padding: 10px 14px; font-size: .76rem; }
  .hero-inner { gap: 46px; padding-top: 118px; }
  .hero h1 { font-size: clamp(1.9rem, 8.2vw, 3rem); line-height: 1.35; }
  .hero-title-primary > span { display: block; }
  .hero-title-primary > span + span { margin-left: 0; }
  .hero-lead { font-size: .94rem; }
  .hero-trust { flex-wrap: wrap; font-size: .74rem; }
  .hero-products { min-height: 340px; }
  .hero-product-misemaru { grid-template-columns: 132px 1fr; gap: 14px; width: 88%; top: 10%; left: 0; padding: 18px; }
  .misemaru-visual { width: 132px; height: 92px; }
  .misemaru-visual img { width: 124px; height: 88px; }
  .hero-product-akamain { grid-template-columns: 100px 1fr; width: 88%; right: 3%; padding: 18px; }
  .akamain-visual { width: 100px; height: 92px; }
  .intro-strip-inner { display: block; }
  .intro-strip h2 { margin-top: 8px; }
  .section { padding: 82px 0; }
  .section-heading { grid-template-columns: 1fr; gap: 16px; }
  .case-study { border-radius: 20px; }
  .case-topline { align-items: flex-start; padding: 18px; }
  .case-topline p { display: block; }
  .case-topline p span { display: block; }
  .case-topline p span + span { margin-top: 5px; }
  .case-grid, .case-grid-reverse { gap: 34px; padding: 38px 20px 30px; }
  .case-brand img { width: 60px; height: 60px; }
  .case-media { min-height: 460px; }
  .misemaru-media { min-height: 500px; padding: 18px; }
  .pc-caption { top: 20px; left: 18px; }
  .mobile-caption { right: 12px; bottom: 297px; }
  .misemaru-pc-device { top: 57px; right: 17px; left: 17px; padding: 9px 7px 12px; border-radius: 12px; }
  .pc-stand { bottom: -20px; height: 20px; border-bottom-width: 5px; }
  .pc-stand::before { width: 12px; height: 17px; }
  .misemaru-mobile-device { right: 11px; bottom: 17px; width: 126px; height: 270px; border-width: 6px; border-radius: 24px; }
  .akamain-media { min-height: auto; padding: 18px; }
  .akamain-poster { min-height: 290px; }
  .training-flow { gap: 5px; }
  .training-flow div { display: block; padding: 7px; text-align: center; }
  .training-flow img { margin: 0 auto 4px; }
  .review-axes div { grid-template-columns: 1fr 1fr; }
  .case-footer { grid-template-columns: 1fr; }
  .case-footer > div + div { border-top: 1px solid var(--line); border-left: 0; }
  .capability-item { grid-template-columns: 42px 1fr; gap: 14px; }
  .capability-item > b { display: none; }
  .approach-grid { grid-template-columns: 1fr; }
  .approach-grid li { min-height: 0; }
  .approach-art { width: min(190px, 72%); margin-top: 18px; }
  .about-grid { grid-template-columns: 1fr; gap: 72px; }
  .about-photo { width: calc(100% - 22px); }
  .contact-grid { gap: 56px; }
  .contact-form { padding: 24px 18px; border-radius: 20px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .footer-main { grid-template-columns: 1fr; gap: 24px; }
  .footer-main nav { grid-column: auto; flex-wrap: wrap; }
  .footer-bottom { gap: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}