/* =========================================================
   GST, Inc. — Corporate site
   ========================================================= */

:root {
  --navy-0: #0b1622;
  --navy-1: #13293d;
  --navy-2: #1d3a57;
  --cyan: #4fd8ff;
  --cyan-soft: rgba(79, 216, 255, 0.14);
  --green: #2ea45f;
  --green-deep: #1f6b3e;
  --red: #d63a2f;
  --amber: #f5b84c;

  --ink: #13293d;
  --ink-muted: #5b6b7c;
  --line: #e1e8ef;
  --bg: #ffffff;
  --bg-tint: #f2f6fa;

  --font-ja: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  --font-en: "Inter", var(--font-ja);

  --radius: 16px;
  --radius-sm: 10px;
  --header-h: 72px;
  --container: 1160px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-ja);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt";
  letter-spacing: .02em;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }

.container { width: min(100% - 32px, var(--container)); margin-inline: auto; }

.sp-only { display: none; }
@media (max-width: 640px) {
  .sp-only { display: inline; }
  .pc-only { display: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 700; font-size: 15px; line-height: 1;
  border: 1px solid transparent;
  transition: transform .25s var(--ease), background-color .25s, box-shadow .25s, border-color .25s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--cyan); color: var(--navy-0); box-shadow: 0 8px 30px -8px rgba(79, 216, 255, .6); }
.btn-primary:hover { box-shadow: 0 12px 36px -8px rgba(79, 216, 255, .85); }
.btn-ghost { color: #fff; border-color: rgba(255, 255, 255, .3); }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .06); }
.btn-sm { padding: 10px 18px; font-size: 14px; }
.btn-lg { padding: 18px 34px; font-size: 16px; }

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50;
  height: var(--header-h);
  color: #fff;
  transition: background-color .3s, backdrop-filter .3s, box-shadow .3s;
}
.site-header.is-scrolled {
  background: rgba(11, 22, 34, .78);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .06);
}
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-name { font-family: var(--font-en); font-weight: 800; font-size: 22px; letter-spacing: .04em; }
.brand-sub { font-weight: 500; opacity: .6; font-size: .7em; letter-spacing: 0; }

.global-nav { display: flex; align-items: center; gap: 28px; font-size: 14px; font-weight: 500; }
.global-nav a:not(.btn) { position: relative; opacity: .85; transition: opacity .2s; }
.global-nav a:not(.btn):hover { opacity: 1; }
.global-nav a:not(.btn)::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px;
  background: var(--cyan); transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease);
}
.global-nav a:not(.btn):hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none; width: 44px; height: 44px; border: 0; background: transparent; cursor: pointer;
  position: relative; color: #fff;
}
.nav-toggle span {
  position: absolute; left: 11px; right: 11px; height: 2px; background: currentColor; border-radius: 2px;
  transition: transform .3s var(--ease), top .3s var(--ease);
}
.nav-toggle span:first-child { top: 17px; }
.nav-toggle span:last-child { top: 25px; }
.nav-open .nav-toggle span:first-child { top: 21px; transform: rotate(45deg); }
.nav-open .nav-toggle span:last-child { top: 21px; transform: rotate(-45deg); }

@media (max-width: 960px) {
  .nav-toggle { display: block; z-index: 2; }
  .global-nav {
    position: fixed; inset: 0; z-index: 1;
    flex-direction: column; justify-content: center; gap: 26px;
    font-size: 18px;
    background: rgba(11, 22, 34, .97);
    opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s;
  }
  .nav-open .global-nav { opacity: 1; visibility: visible; }
  .nav-open { overflow: hidden; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center;
  color: #fff;
  background: radial-gradient(120% 90% at 80% 0%, #1b3a58 0%, var(--navy-1) 35%, var(--navy-0) 75%);
  overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 96px;
}
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-glow {
  position: absolute; width: 60vw; height: 60vw; right: -15vw; top: -20vw; border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 216, 255, .18), transparent 60%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: auto 0 0; height: 160px;
  background: linear-gradient(to bottom, transparent, rgba(11, 22, 34, .6));
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; pointer-events: none; }
.hero-inner a { pointer-events: auto; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-en); font-weight: 600; font-size: 13px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--cyan);
  padding: 8px 14px; border-radius: 999px; background: var(--cyan-soft); border: 1px solid rgba(79, 216, 255, .25);
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 0 rgba(79, 216, 255, .7); animation: ping 2s infinite; }
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(79, 216, 255, .7); } 80%, 100% { box-shadow: 0 0 0 10px rgba(79, 216, 255, 0); } }

.hero-title {
  margin-top: 28px;
  font-size: clamp(48px, 9vw, 112px);
  font-weight: 900; line-height: 1.12; letter-spacing: .02em;
  background: linear-gradient(100deg, #fff 30%, #bfefff 60%, var(--cyan) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { margin-top: 28px; max-width: 760px; font-size: clamp(15px, 1.5vw, 17px); color: rgba(255, 255, 255, .78); }
.hero-lead strong { white-space: nowrap; color: #fff; font-family: var(--font-en); font-weight: 700; }
.hero-cta { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 14px; }

.hero-badges { margin-top: 56px; display: flex; flex-wrap: wrap; gap: 12px 32px; }
.hero-badges li {
  font-size: 14px; font-weight: 700; padding-left: 14px; border-left: 2px solid var(--cyan);
  line-height: 1.5;
}
.hero-badges span { display: block; font-size: 12px; font-weight: 400; color: rgba(255, 255, 255, .6); }

.scroll-cue {
  position: absolute; left: 50%; bottom: 28px; z-index: 1; translate: -50% 0;
  width: 26px; height: 42px; border: 1.5px solid rgba(255, 255, 255, .4); border-radius: 14px;
}
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: #fff; animation: scroll 1.8s infinite; }
@keyframes scroll { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* ---------- Sections ---------- */
.section { padding: clamp(80px, 11vw, 140px) 0; }
.section-tint { background: var(--bg-tint); }
.section-dark { background: var(--navy-1); color: #fff; position: relative; overflow: hidden; }
.section-dark::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(79, 216, 255, .12) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-mask-image: radial-gradient(ellipse at 70% 30%, #000 0%, transparent 70%);
  mask-image: radial-gradient(ellipse at 70% 30%, #000 0%, transparent 70%);
}
.section-dark > .container { position: relative; }

.section-head { max-width: 760px; margin-bottom: clamp(40px, 6vw, 64px); }
.section-label {
  font-family: var(--font-en); font-weight: 700; font-size: 13px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--navy-2); display: flex; align-items: center; gap: 12px;
}
.section-label::before { content: ""; width: 28px; height: 2px; background: var(--cyan); }
.section-dark .section-label, .contact .section-label { color: var(--cyan); }
.section-title { margin-top: 16px; font-size: clamp(28px, 4.2vw, 44px); font-weight: 900; line-height: 1.4; letter-spacing: .03em; }
.section-lead { margin-top: 20px; color: var(--ink-muted); font-size: clamp(15px, 1.5vw, 17px); }
.section-dark .section-lead { color: rgba(255, 255, 255, .72); }

/* ---------- Problem ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scene {
  position: relative; padding: 28px 24px 32px; border-radius: var(--radius);
  background: var(--bg-tint); border: 1px solid var(--line);
  transition: transform .35s var(--ease), box-shadow .35s;
}
.scene:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -20px rgba(19, 41, 61, .35); }
.scene::before {
  content: ""; position: absolute; top: 28px; right: 24px; width: 10px; height: 10px; border-radius: 50%;
  border: 2px solid var(--navy-2); background: #fff;
}
.scene-tag { display: inline-block; font-size: 13px; font-weight: 700; color: var(--ink-muted); margin-bottom: 14px; }
.scene p { font-weight: 500; line-height: 1.75; }
@media (max-width: 960px) { .scene-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .scene-grid { grid-template-columns: 1fr; } }

/* ---------- Solution ---------- */
.solution-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(32px, 6vw, 72px); align-items: start; }
.feature-list { display: grid; gap: 36px; }
.feature-list li { display: grid; grid-template-columns: 64px 1fr; gap: 20px; }
.feature-num {
  font-family: var(--font-en); font-weight: 800; font-size: 28px; color: var(--cyan);
  border-top: 2px solid var(--cyan); padding-top: 6px; line-height: 1.2;
}
.feature-list h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.feature-list p { color: rgba(255, 255, 255, .72); font-size: 15px; }

.layers {
  padding: 32px; border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(255, 255, 255, .07), rgba(255, 255, 255, .02));
  border: 1px solid rgba(255, 255, 255, .1);
}
.layers-title { font-size: 13px; font-weight: 700; letter-spacing: .1em; color: rgba(255, 255, 255, .6); margin-bottom: 8px; }
.layer { display: grid; grid-template-columns: 120px 1fr; gap: 20px; align-items: center; padding: 20px 0; }
.layer + .layer { border-top: 1px solid rgba(255, 255, 255, .08); }
.layer svg { width: 100%; height: auto; overflow: visible; }
.layer svg circle, .layer svg rect { fill: var(--navy-0); stroke: var(--cyan); stroke-width: 2; }
.layer svg line { stroke: var(--cyan); stroke-width: 2; stroke-dasharray: 4 5; animation: dash 1.2s linear infinite; }
.layer:nth-child(3) svg line { animation-duration: 1.6s; }
@keyframes dash { to { stroke-dashoffset: -18; } }
.layer h4 { font-size: 16px; font-weight: 700; }
.layer p { font-size: 13px; color: rgba(255, 255, 255, .65); line-height: 1.7; }

.tagline {
  margin-top: clamp(56px, 8vw, 88px); text-align: center;
  font-size: clamp(20px, 2.8vw, 30px); font-weight: 900; letter-spacing: .04em;
  background: linear-gradient(90deg, #fff, var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent;
}

@media (max-width: 860px) {
  .solution-grid { grid-template-columns: 1fr; }
  .layers { padding: 24px; }
  .layer { grid-template-columns: 96px 1fr; }
}

/* ---------- Products ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product {
  position: relative; padding: 36px 32px; border-radius: var(--radius);
  background: #fff; border: 1px solid var(--line); overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s;
}
.product::before {
  content: ""; position: absolute; left: 32px; top: 0; width: 40px; height: 2px; background: var(--cyan);
}
.product:hover { transform: translateY(-4px); box-shadow: 0 24px 50px -28px rgba(19, 41, 61, .35); }
.product-icon {
  width: 64px; height: 64px; border-radius: 22%; object-fit: cover;
  box-shadow: 0 0 0 1px rgba(19, 41, 61, .08), 0 8px 20px -10px rgba(19, 41, 61, .45);
}
.product h3 { margin-top: 24px; font-family: var(--font-en); font-size: 26px; font-weight: 800; letter-spacing: 0; }
.badge-soon {
  display: inline-block; vertical-align: middle; margin-left: 12px; padding: 3px 10px;
  font-family: var(--font-ja); font-size: 12px; font-weight: 700; letter-spacing: .04em; line-height: 1.5;
  color: var(--navy-1); background: var(--cyan-soft); border: 1px solid rgba(79, 216, 255, .6); border-radius: 999px;
}
.product-kind { font-size: 13px; font-weight: 700; color: var(--ink-muted); margin: 4px 0 16px; }
.product > p:not(.product-kind) { font-size: 15px; color: var(--ink-muted); }
.product ul { margin-top: 20px; padding-top: 20px; border-top: 1px dashed var(--line); display: grid; gap: 8px; }
.product li { position: relative; padding-left: 22px; font-size: 14px; font-weight: 500; }
.product li::before {
  content: ""; position: absolute; left: 2px; top: .62em; width: 10px; height: 6px;
  border-left: 2px solid var(--navy-2); border-bottom: 2px solid var(--navy-2); transform: rotate(-45deg);
}
@media (max-width: 900px) { .product-grid { grid-template-columns: 1fr; max-width: 560px; } }

/* ---------- Movie ---------- */
.movie-wrap .section-head { margin-inline: auto; text-align: center; }
.movie-wrap .section-label { justify-content: center; }
.video {
  max-width: 920px; margin-inline: auto; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden;
  background: var(--navy-0); box-shadow: 0 40px 80px -40px rgba(19, 41, 61, .6);
}
.video iframe { width: 100%; height: 100%; border: 0; display: block; }
.video-play { position: relative; width: 100%; height: 100%; padding: 0; border: 0; cursor: pointer; background: none; }
.video-play img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease), opacity .3s; opacity: .85; }
.video-play:hover img { transform: scale(1.03); opacity: 1; }
.play-icon {
  position: absolute; left: 50%; top: 50%; translate: -50% -50%;
  width: 84px; height: 84px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 0 12px rgba(79, 216, 255, .25);
  transition: transform .3s var(--ease);
}
.play-icon::after {
  content: ""; position: absolute; left: 34px; top: 27px;
  border-left: 22px solid var(--navy-0); border-top: 15px solid transparent; border-bottom: 15px solid transparent;
}
.video-play:hover .play-icon { transform: scale(1.08); }

/* ---------- Use cases ---------- */
.usecase-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.usecase {
  padding: 28px 24px; border-radius: var(--radius); background: var(--bg-tint);
  transition: background-color .3s, transform .35s var(--ease);
}
.usecase:hover { background: #e8eff6; transform: translateY(-4px); }
.usecase-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; font-weight: 700; color: var(--ink-muted); }
.chip {
  font-family: var(--font-en); font-size: 11px; font-weight: 700; letter-spacing: .04em;
  padding: 2px 9px; border-radius: 999px; border: 1px solid var(--navy-2); color: var(--navy-2);
}
.usecase h3 { margin: 14px 0 10px; font-size: 18px; font-weight: 700; line-height: 1.5; }
.usecase p { font-size: 14px; color: var(--ink-muted); line-height: 1.8; }
.usecase-cta { background: var(--navy-1); color: #fff; display: flex; flex-direction: column; }
.usecase-cta:hover { background: var(--navy-2); }
.usecase-cta h3 { margin-top: 0; color: var(--cyan); }
.usecase-cta p { color: rgba(255, 255, 255, .72); }
.text-link { margin-top: auto; padding-top: 16px; font-weight: 700; color: var(--cyan); }
@media (max-width: 1060px) { .usecase-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .usecase-grid { grid-template-columns: 1fr; } }

/* ---------- IP & Security ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(255, 255, 255, .1); border-radius: var(--radius); overflow: hidden; }
.stats > div { background: var(--navy-1); padding: 32px 28px; }
.stats dt { font-size: 13px; font-weight: 700; color: rgba(255, 255, 255, .6); letter-spacing: .06em; }
.stats dd { margin-top: 6px; font-family: var(--font-en); font-weight: 800; font-size: clamp(48px, 6vw, 72px); line-height: 1; color: #fff; }
.stats dd small { font-family: var(--font-ja); font-size: 16px; font-weight: 700; margin-left: 6px; color: var(--cyan); }
.stats p { margin-top: 12px; font-size: 13px; color: rgba(255, 255, 255, .6); line-height: 1.6; }
@media (max-width: 720px) { .stats { grid-template-columns: 1fr; } }

.ip-grid { margin-top: 24px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ip-card {
  padding: 32px 28px; border-radius: var(--radius);
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .1);
}
.ip-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 14px; padding-left: 14px; border-left: 3px solid var(--cyan); line-height: 1.5; }
.ip-card p { font-size: 14px; color: rgba(255, 255, 255, .72); }
.patent-list { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.patent-list li {
  font-family: var(--font-en); font-size: 12px; font-weight: 600; padding: 5px 10px; border-radius: 6px;
  background: var(--cyan-soft); color: var(--cyan); white-space: nowrap;
}
@media (max-width: 960px) { .ip-grid { grid-template-columns: 1fr; } }

/* ---------- Team ---------- */
.team-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.member {
  display: grid; grid-template-columns: 96px 1fr; gap: 24px; align-items: start;
  padding: 32px; border-radius: var(--radius); border: 1px solid var(--line);
  transition: box-shadow .35s, transform .35s var(--ease);
}
.member:hover { transform: translateY(-4px); box-shadow: 0 20px 44px -24px rgba(19, 41, 61, .35); }
.member-photo { width: 96px; height: 96px; border-radius: 50%; object-fit: cover; box-shadow: 0 0 0 4px #fff, 0 0 0 6px var(--line); }
.member-initial {
  display: grid; place-items: center; background: var(--navy-1); color: #fff;
  font-family: var(--font-en); font-weight: 800; font-size: 30px;
}
.member-role { font-size: 12px; font-weight: 700; color: var(--ink-muted); letter-spacing: .06em; }
.member h3 { font-size: 22px; font-weight: 900; margin-top: 2px; line-height: 1.4; }
.member-core { display: inline-block; margin: 8px 0 12px; font-size: 12px; font-weight: 700; color: var(--navy-2); background: var(--bg-tint); padding: 2px 10px; border-radius: 999px; }
.member p:last-child { font-size: 14px; color: var(--ink-muted); line-height: 1.8; }
@media (max-width: 860px) { .team-grid { grid-template-columns: 1fr; } }
@media (max-width: 480px) {
  .member { grid-template-columns: 1fr; padding: 28px 24px; }
  .member-photo { width: 80px; height: 80px; }
}

/* ---------- Company ---------- */
.company-wrap { max-width: 880px; }
.company-table { border-top: 2px solid var(--navy-1); }
.company-table > div { display: grid; grid-template-columns: 180px 1fr; gap: 24px; padding: 22px 8px; border-bottom: 1px solid var(--line); }
.company-table dt { font-weight: 700; }
.company-table dd { color: var(--ink-muted); }
.biz-details { margin-top: 14px; }
.biz-details summary {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer; list-style: none;
  font-size: 13px; font-weight: 700; color: var(--navy-2);
}
.biz-details summary::-webkit-details-marker { display: none; }
.biz-details summary::before {
  content: ""; width: 7px; height: 7px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(-45deg); transition: transform .2s;
}
.biz-details[open] summary::before { transform: rotate(45deg); }
.biz-details summary:hover { color: var(--ink); }
.biz-list { counter-reset: biz; display: grid; gap: 6px; margin-top: 12px; padding: 16px 20px; background: #fff; border-radius: var(--radius-sm); font-size: 14px; }
.biz-list li { counter-increment: biz; position: relative; padding-left: 2em; line-height: 1.75; }
.biz-list li::before { content: counter(biz) "."; position: absolute; left: 0; font-family: var(--font-en); font-weight: 600; color: var(--navy-2); }
.ext-link { color: var(--navy-2); text-decoration: underline; text-underline-offset: 3px; }
.ext-link:hover { color: var(--ink); }
@media (max-width: 560px) { .company-table > div { grid-template-columns: 1fr; gap: 4px; } }

/* ---------- Contact ---------- */
.contact {
  position: relative; overflow: hidden; overflow: clip; color: #fff; text-align: center;
  padding: clamp(96px, 12vw, 160px) 0;
  background: radial-gradient(80% 120% at 50% 100%, #1d4d6f 0%, var(--navy-1) 45%, var(--navy-0) 100%);
}
.contact::before {
  content: ""; position: absolute; left: 50%; bottom: -40%; width: 900px; height: 900px; translate: -50% 0;
  border-radius: 50%; border: 1px solid rgba(79, 216, 255, .15);
  box-shadow: 0 0 0 120px rgba(79, 216, 255, .03), 0 0 0 240px rgba(79, 216, 255, .02);
  pointer-events: none;
}
.contact-inner { position: relative; display: flex; flex-direction: column; align-items: center; }
.contact h2 { margin-top: 18px; font-size: clamp(26px, 4vw, 42px); font-weight: 900; line-height: 1.45; }
.contact p:not(.section-label) { margin: 20px 0 40px; color: rgba(255, 255, 255, .72); max-width: 560px; }
html:not(.js) .contact-toggle { display: none; }
.contact-toggle { gap: 12px; }
.contact-toggle-icon {
  width: 10px; height: 10px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  rotate: 45deg; translate: 0 -3px; transition: rotate .4s ease, translate .4s ease;
}
.contact-toggle[aria-expanded="true"] .contact-toggle-icon { rotate: 225deg; translate: 0 3px; }
.js .contact-collapse {
  display: grid; grid-template-rows: 0fr; width: 100%; opacity: 0;
  transition: grid-template-rows .7s cubic-bezier(.2, .7, .2, 1), opacity .5s ease;
}
.js .contact-collapse.is-open { grid-template-rows: 1fr; opacity: 1; }
.contact-collapse { width: 100%; }
.contact-collapse-inner {
  min-height: 0; overflow: hidden; display: flex; flex-direction: column; align-items: center;
}
.contact-collapse .contact-form { margin-top: 40px; }
html:not(.js) .contact-collapse { display: none; }
.contact-form {
  width: 100%; max-width: 720px; border-radius: 16px; overflow: hidden; background: #fff;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
}
.contact-form iframe { display: block; width: 100%; height: 1480px; border: 0; }
.contact-alt { margin-top: 20px; font-size: 13px; color: rgba(255, 255, 255, .6); text-decoration: underline; text-underline-offset: 3px; }
.contact-alt:hover { color: #fff; }
@media (max-width: 720px) {
  .contact-form iframe { height: 1580px; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-0); color: rgba(255, 255, 255, .7); padding: 48px 0; font-size: 13px; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.site-footer .brand { color: #fff; }
.site-footer .brand-name { font-size: 18px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.footer-nav a:hover { color: #fff; }
.footer-address { width: 100%; font-style: normal; color: rgba(255, 255, 255, .55); }
.footer-address a:hover { color: #fff; }
.tel-link { color: inherit; font-family: var(--font-en); }
.tel-link:hover { color: var(--navy-2); }
.copyright { width: 100%; padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, .08); font-family: var(--font-en); font-size: 12px; color: rgba(255, 255, 255, .45); }

/* ---------- Reveal animation ---------- */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }

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

/* =========================================================
   Sub page: 情報セキュリティ基本方針
   ========================================================= */
.page-hero { padding: calc(var(--header-h) + clamp(48px, 7vw, 88px)) 0 clamp(48px, 7vw, 80px); }
.page-hero .section-title { color: #fff; }
.policy { padding-top: clamp(56px, 8vw, 96px); }
.policy-inner { max-width: 820px; }
.policy-intro { font-size: clamp(15px, 1.5vw, 17px); line-height: 2; }
.policy-list { margin-top: clamp(40px, 5vw, 56px); counter-reset: policy; border-top: 1px solid var(--line); }
.policy-list li {
  counter-increment: policy; position: relative;
  padding: 28px 0 28px 64px; border-bottom: 1px solid var(--line);
}
.policy-list li::before {
  content: counter(policy, decimal-leading-zero);
  position: absolute; left: 0; top: 26px;
  font-family: var(--font-en); font-weight: 800; font-size: 22px; color: var(--cyan);
  letter-spacing: .02em;
}
.policy-list h2 { font-size: clamp(17px, 1.8vw, 19px); font-weight: 700; line-height: 1.6; }
.policy-list p { margin-top: 8px; color: var(--ink-muted); }
.policy-sign { margin-top: 48px; text-align: right; line-height: 2; }
.policy-sign p + p { margin-top: 12px; font-weight: 700; }
.policy-back { margin-top: 56px; }
.policy-back a { color: var(--navy-2); font-weight: 700; }
.policy-back a:hover { color: var(--cyan); }
@media (max-width: 560px) {
  .policy-list li { padding-left: 48px; }
  .policy-list li::before { font-size: 18px; top: 28px; }
}

/* ---------- 認定・宣言（会社概要の表の1行） ---------- */
.cert-grid { display: grid; gap: 12px; }
.cert-card {
  display: flex; align-items: center; gap: 20px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 20px;
}
.cert-logo { flex: none; }
.cert-logo img { width: auto; height: 96px; }
.cert-name { font-weight: 700; color: var(--ink); }
.cert-desc { margin-top: 4px; font-size: 14px; line-height: 1.8; }
.cert-link { display: inline-block; margin-top: 6px; font-size: 14px; font-weight: 700; color: var(--navy-2); }
.cert-link:hover { color: var(--cyan); }
@media (max-width: 560px) {
  .cert-card { gap: 14px; padding: 14px; align-items: flex-start; }
  .cert-logo img { height: 80px; }
  .cert-desc { font-size: 13px; }
}

/* ---------- SECURITY ACTION declaration (policy page) ---------- */
.sa-declare {
  display: flex; align-items: center; gap: 28px;
  margin-bottom: clamp(40px, 5vw, 56px); padding: 24px 28px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(19, 41, 61, .06);
}
.sa-declare-logo { flex: none; }
.sa-declare-logo img { width: auto; height: 120px; }
.sa-declare-title { font-weight: 700; font-size: clamp(17px, 1.9vw, 20px); }
.sa-declare-text { margin-top: 8px; font-size: 14px; color: var(--ink-muted); line-height: 1.9; }
@media (max-width: 560px) {
  .sa-declare { gap: 16px; padding: 20px 16px; align-items: flex-start; }
  .sa-declare-logo img { height: 88px; }
  .sa-declare-text { font-size: 13px; }
}
.nowrap { white-space: nowrap; }