/* Tenkan Inc. — static site stylesheet (no external resources) */

@font-face { font-family: "Source Sans 3"; font-weight: 400; font-style: normal; font-display: swap; src: url("../fonts/source-sans-3-latin-400.woff2") format("woff2"); }
@font-face { font-family: "Source Sans 3"; font-weight: 600; font-style: normal; font-display: swap; src: url("../fonts/source-sans-3-latin-600.woff2") format("woff2"); }
@font-face { font-family: "Source Sans 3"; font-weight: 700; font-style: normal; font-display: swap; src: url("../fonts/source-sans-3-latin-700.woff2") format("woff2"); }

:root {
  --navy: #071b50;
  --navy-deep: #051643;
  --navy-card: #0c2463;
  --orange: #ffa737;
  --orange-dark: #f2921a;
  --brand: #4149c4;
  --brand-light: #607afe;
  --heading: #202020;
  --text: #5d5d5d;
  --muted: #8a8d93;
  --line: #e7e9ee;
  --bg-light: #f7f8f9;
  --white: #fff;
  --radius: 4px;
  --wrap: 1170px;
  --header-h: 88px;
  --font-ja: "Source Sans 3", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  --font-zh: "Source Sans 3", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-en: "Source Sans 3", "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-ja);
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
  background: var(--white);
  letter-spacing: .02em;
  overflow-x: hidden;
}
html[lang="zh-CN"] body { font-family: var(--font-zh); }
html[lang="en"] body { font-family: var(--font-en); letter-spacing: 0; line-height: 1.75; }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--orange-dark); text-decoration: none; transition: color .2s; }
a:hover { color: var(--brand); }
h1, h2, h3, h4 { color: var(--heading); font-weight: 700; line-height: 1.35; margin: 0 0 .6em; }
h2 { font-size: clamp(26px, 3.2vw, 38px); }
h3 { font-size: 20px; }
p { margin: 0 0 1.2em; }
ul { padding-left: 1.3em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 30px; }
.narrow { max-width: 820px; }
.center { text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Header ---------- */
.site-header {
  position: absolute; top: 0; left: 0; right: 0; z-index: 50;
  height: var(--header-h);
  transition: background .3s, box-shadow .3s, height .3s;
}
.site-header.is-fixed {
  position: fixed; height: 70px;
  background: rgba(7, 27, 80, .97);
  box-shadow: 0 2px 18px rgba(0, 0, 0, .18);
}
.site-header .wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; max-width: 1240px; }

.brand { display: flex; align-items: center; gap: 12px; color: var(--white); flex-shrink: 0; }
.brand:hover { color: var(--white); }
.brand img { width: 26px; height: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 19px; font-weight: 600; letter-spacing: .06em; font-family: var(--font-ja); }
.brand-sub { font-size: 10px; letter-spacing: .08em; opacity: .85; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  color: var(--white); font-size: 14px; padding: 8px 12px; white-space: nowrap; font-weight: 400;
}
.nav a:hover, .nav a.active { color: var(--orange); }
.nav .btn { margin-left: 10px; }

.lang {
  position: relative; margin-left: 10px;
}
.lang-btn {
  display: flex; align-items: center; gap: 6px;
  background: transparent; border: 1px solid rgba(255,255,255,.45); color: var(--white);
  border-radius: 999px; padding: 5px 12px; font: inherit; font-size: 13px; cursor: pointer;
}
.lang-btn:hover { border-color: var(--orange); color: var(--orange); }
.lang-btn svg { width: 15px; height: 15px; }
.lang-menu {
  position: absolute; right: 0; top: calc(100% + 8px); min-width: 130px;
  background: var(--white); border-radius: var(--radius); box-shadow: 0 10px 30px rgba(0,0,0,.18);
  list-style: none; margin: 0; padding: 6px 0; display: none;
}
.lang.open .lang-menu { display: block; }
.lang-menu a { display: block; color: var(--heading); padding: 6px 16px; font-size: 14px; }
.lang-menu a:hover, .lang-menu a[aria-current="true"] { color: var(--orange-dark); background: var(--bg-light); }

.nav-toggle { display: none; background: none; border: 0; color: var(--white); padding: 8px; cursor: pointer; }
.nav-toggle svg { width: 26px; height: 26px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; background: var(--orange); color: var(--white) !important;
  border-radius: 999px; padding: 9px 24px; font-size: 13px; font-weight: 700; letter-spacing: .05em;
  border: 2px solid var(--orange); transition: background .2s, border-color .2s, transform .2s;
  cursor: pointer; line-height: 1.6;
}
.btn:hover { background: var(--orange-dark); border-color: var(--orange-dark); transform: translateY(-1px); }
.btn-lg { padding: 13px 34px; font-size: 15px; }
.btn-outline { background: transparent; color: var(--heading) !important; border: 2px solid var(--heading); }
.btn-outline:hover { background: var(--heading); color: var(--white) !important; border-color: var(--heading); }
.btn-ghost { background: transparent; border-color: rgba(255,255,255,.8); }
.btn-ghost:hover { background: var(--white); color: var(--navy) !important; border-color: var(--white); }

/* ---------- Home hero slider ---------- */
.hero {
  position: relative; min-height: 640px; height: 100vh; max-height: 860px;
  color: var(--white); overflow: hidden; background: var(--navy);
}
.slide {
  position: absolute; inset: 0; display: flex; align-items: center;
  opacity: 0; visibility: hidden; transition: opacity 1s ease, visibility 1s;
}
.slide.is-active { opacity: 1; visibility: visible; }
.slide-1 { background: linear-gradient(150deg, #080e7b 0%, #3c1da8 60%, #a23aff 100%); }
.slide-2 { background: linear-gradient(140deg, #4f00bc 0%, #09abe2 100%); }
.slide-3 { background: linear-gradient(140deg, #311b5b 0%, #b24258 65%, #ff9d48 100%); }
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: url("../img/pattern_background.png") center / cover no-repeat;
  animation: drift 18s ease-in-out infinite alternate;
}
@keyframes drift { from { transform: translateY(0) scale(1); } to { transform: translateY(-24px) scale(1.04); } }
.slide-inner { position: relative; z-index: 2; padding-top: 40px; max-width: 900px; }
.slide .eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: .25em; text-transform: uppercase;
  color: rgba(255,255,255,.75); margin-bottom: 18px;
}
.slide h1, .slide h2 {
  color: var(--white); font-size: clamp(34px, 5.6vw, 66px); line-height: 1.2; margin-bottom: 22px;
  letter-spacing: .04em;
}
.slide p { font-size: clamp(16px, 1.6vw, 19px); color: rgba(255,255,255,.9); max-width: 720px; margin-bottom: 34px; }
.hero.started .slide.is-active .anim { animation: rise .9s both; }
.hero.started .slide.is-active .anim:nth-child(2) { animation-delay: .15s; }
.hero.started .slide.is-active .anim:nth-child(3) { animation-delay: .3s; }
.hero.started .slide.is-active .anim:nth-child(4) { animation-delay: .45s; }
@keyframes rise { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: none; } }
.hero-mark {
  position: absolute; right: 7%; bottom: 14%; width: min(22vw, 230px); opacity: .14; z-index: 1;
  filter: brightness(0) invert(1);
}
.hero-dots { position: absolute; z-index: 5; left: 0; right: 0; bottom: 34px; display: flex; justify-content: center; gap: 12px; }
.hero-dots button {
  width: 11px; height: 11px; border-radius: 50%; border: 2px solid rgba(255,255,255,.8);
  background: transparent; padding: 0; cursor: pointer; transition: background .2s, transform .2s;
}
.hero-dots button[aria-current="true"] { background: var(--white); transform: scale(1.15); }

/* ---------- Page title bar (inner pages) ---------- */
.page-hero {
  position: relative; color: var(--white); text-align: center;
  min-height: 420px; padding: calc(var(--header-h) + 60px) 0 110px;
  background-color: var(--navy); background-size: cover; background-position: center bottom;
  display: flex; align-items: center;
}
.page-hero::before { content: ""; position: absolute; inset: 0; background: rgba(5, 12, 40, .35); }
.page-hero .wrap { position: relative; }
.page-hero h1 { color: var(--white); font-size: clamp(32px, 4.4vw, 50px); letter-spacing: .04em; margin-bottom: 10px; }
.page-hero p { font-size: clamp(15px, 1.5vw, 18px); color: rgba(255,255,255,.92); margin: 0 auto; max-width: 760px; }
.page-hero .wave { position: absolute; left: 0; right: 0; bottom: -1px; width: 100%; height: 70px; }

/* ---------- Sections ---------- */
.section { padding: 100px 0; }
.section-sm { padding: 70px 0; }
.bg-light { background: var(--bg-light); }
.bg-navy { background: var(--navy); color: rgba(255,255,255,.82); position: relative; overflow: hidden; }
.bg-navy::before {
  content: ""; position: absolute; inset: 0; opacity: .7; pointer-events: none;
  background: url("../img/pattern_background.png") center / cover no-repeat;
}
.bg-navy > .wrap { position: relative; }
.bg-navy h2, .bg-navy h3, .bg-navy h4 { color: var(--white); }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head p { font-size: 17px; }
.kicker {
  display: inline-block; color: var(--orange-dark); font-size: 13px; font-weight: 700;
  letter-spacing: .22em; text-transform: uppercase; margin-bottom: 10px;
}
.bg-navy .kicker { color: var(--orange); }

.grid { display: grid; gap: 30px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white); padding: 44px 34px; text-align: center; border-radius: 2px;
  transition: transform .3s, box-shadow .3s;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(7, 27, 80, .09); }
.card h3 { margin-bottom: 14px; }
.card p { font-size: 15px; margin: 0; }
.icon { width: 40px; height: 40px; color: var(--orange); margin: 0 auto 22px; }
.icon svg { width: 100%; height: 100%; }

.card-dark {
  background: var(--navy-card); color: rgba(255,255,255,.82); text-align: center;
  padding: 44px 34px; border-radius: 2px; display: flex; flex-direction: column;
  transition: transform .3s, background .3s;
}
.card-dark:hover { transform: translateY(-6px); background: #102a72; }
.card-dark p { font-size: 15px; flex: 1; }
.more { color: var(--orange); font-size: 14px; font-weight: 600; }
.more:hover { color: var(--white); }
.more::after { content: " ›"; }

/* split (image + text) */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.split.reverse > :first-child { order: 2; }
.split img { width: 100%; }

/* track record */
.record { display: flex; gap: 16px; }
.record .check { flex: 0 0 26px; height: 26px; border-radius: 50%; background: var(--brand-light); color: var(--white); display: grid; place-items: center; margin-top: 2px; }
.record .check svg { width: 14px; height: 14px; }
.record h3 { font-size: 17px; margin-bottom: 6px; }
.record p { font-size: 15px; margin: 0; }

/* philosophy teaser on home */
.vision { display: grid; grid-template-columns: 300px 1fr; gap: 80px; align-items: center; }
.vision-mark { position: relative; padding: 30px; }
.vision-mark img { width: 170px; margin: 0 auto; }
.vision-mark::before {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  background: radial-gradient(circle, rgba(96,122,254,.18), rgba(96,122,254,0) 70%);
}
.slogan {
  font-size: clamp(26px, 3.4vw, 40px); color: var(--heading); font-weight: 700; letter-spacing: .08em;
  margin-bottom: 18px;
}
.slogan span { color: var(--brand); }

/* pillars */
.pillar {
  background: var(--white); padding: 44px 36px; border-top: 4px solid var(--brand); height: 100%;
  box-shadow: 0 10px 30px rgba(7, 27, 80, .06);
}
.pillar .num { font-size: 44px; font-weight: 700; color: var(--brand); opacity: .25; line-height: 1; margin-bottom: 14px; font-family: var(--font-en); }
.pillar h3 { font-size: 21px; }
.pillar p, .pillar li { font-size: 15px; }
.pillar ul { margin: 0; padding-left: 1.1em; }
.pillar li { margin-bottom: 6px; }
.pillar li::marker { color: var(--orange); }

/* heavenly stems */
.stems {
  display: grid; grid-template-columns: repeat(10, 1fr); gap: 10px; margin: 40px 0 10px;
}
.stem {
  aspect-ratio: 1; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.22);
  color: var(--white); font-size: clamp(20px, 2.6vw, 32px); font-family: var(--font-zh); border-radius: 2px;
  transition: background .3s, color .3s, border-color .3s;
}
.stem:hover { background: var(--orange); border-color: var(--orange); color: var(--navy); }
.stem-note { font-size: 13px; color: rgba(255,255,255,.6); text-align: center; }
.quote {
  border-left: 3px solid var(--orange); padding: 6px 0 6px 22px; margin: 30px 0;
  font-size: 18px; color: var(--white);
}
.quote cite { display: block; font-style: normal; font-size: 13px; color: rgba(255,255,255,.6); margin-top: 6px; }

/* logo story */
.logo-hero { display: grid; grid-template-columns: 1fr 1.25fr; gap: 70px; align-items: center; }
.logo-stage {
  background: #f1f1f1 url("../img/logo/paper.jpg") center / cover; padding: 60px 30px; text-align: center;
}
.logo-stage img.mark { width: 130px; margin: 0 auto 26px; }
.logo-stage .wordmark { font-size: 34px; color: #313131; letter-spacing: .12em; font-weight: 600; font-family: var(--font-ja); line-height: 1.2; }
.logo-stage .wordmark-sub { color: #555; font-size: 14px; letter-spacing: .08em; font-family: var(--font-en); }
.concept { display: grid; grid-template-columns: 110px 1fr; gap: 28px; align-items: start; padding: 26px 0; border-bottom: 1px solid var(--line); }
.concept:last-child { border-bottom: 0; }
.concept img { width: 110px; border-radius: 6px; }
.concept h3 { font-size: 19px; margin-bottom: 8px; }
.concept h3 small { color: var(--muted); font-weight: 400; font-size: 13px; margin-left: 8px; letter-spacing: .08em; }
.concept p { font-size: 15px; margin: 0 0 .6em; }
.swatches { display: flex; gap: 40px; flex-wrap: wrap; margin-top: 10px; }
.swatch { display: flex; align-items: center; gap: 16px; }
.swatch i { width: 54px; height: 54px; border-radius: 50%; display: block; box-shadow: 0 8px 18px rgba(0,0,0,.15); }
.swatch b { display: block; color: var(--heading); }
.swatch span { font-size: 13px; color: var(--muted); font-family: var(--font-en); }

/* company table */
.info-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.info-table th, .info-table td { text-align: left; vertical-align: top; padding: 14px 0; border-bottom: 1px solid var(--line); }
.info-table th { width: 32%; color: var(--heading); font-weight: 600; padding-right: 20px; }
.info-table td ul { margin: 0; padding: 0; list-style: none; }

/* team / CEO */
.person { background: var(--white); max-width: 980px; margin: 0 auto; display: grid; grid-template-columns: 380px 1fr; box-shadow: 0 14px 40px rgba(7,27,80,.07); }
.person img { width: 100%; height: 100%; object-fit: cover; }
.person-body { padding: 44px 44px 36px; }
.person-body h3 { font-size: 22px; margin-bottom: 2px; }
.person-body .role { color: var(--orange-dark); font-weight: 700; font-size: 14px; letter-spacing: .08em; margin-bottom: 18px; display: block; }
.person-body p { font-size: 15px; }

/* services page */
.service { padding: 90px 0; }
.service:nth-child(even) { background: var(--bg-light); }
.service .split { gap: 80px; }
.service h2 { font-size: clamp(24px, 2.8vw, 34px); }
.feature-list { list-style: none; padding: 0; margin: 26px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 18px 28px; }
.feature-list li { padding-left: 26px; position: relative; font-size: 15px; line-height: 1.7; }
.feature-list li::before { content: ""; position: absolute; left: 0; top: .55em; width: 10px; height: 10px; border-radius: 50%; background: var(--orange); }
.feature-list b { display: block; color: var(--heading); margin-bottom: 2px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tags span { font-size: 13px; padding: 3px 12px; border-radius: 999px; background: rgba(65,73,196,.08); color: var(--brand); }

/* careers */
.jobs { background: linear-gradient(120deg, rgba(53,63,220,.92), rgba(36,120,220,.85)), url("../img/background1.jpg") center / cover; color: var(--white); }
.job { border: 1px solid var(--orange); padding: 22px 26px; transition: background .3s; }
.job:hover { background: rgba(255,255,255,.07); }
.job h3 { color: var(--orange); font-size: 22px; margin-bottom: 6px; }
.job p { margin: 0; font-size: 15px; color: rgba(255,255,255,.9); }
.apply { margin-top: 46px; text-align: center; }
.apply p { color: rgba(255,255,255,.92); }
.growth { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.growth .card { padding: 36px 24px; }
.growth .card h3 { font-size: 18px; }

/* CTA band */
.cta {
  position: relative; text-align: center; color: var(--white); padding: 110px 0;
  background: var(--navy) center / cover no-repeat;
}
.cta::before { content: ""; position: absolute; inset: 0; background: rgba(5, 12, 40, .62); }
.cta .wrap { position: relative; }
.cta h2 { color: var(--white); }
.cta p { color: rgba(255,255,255,.88); max-width: 640px; margin: 0 auto 28px; }

/* contact */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.contact-card { background: var(--white); padding: 40px 32px; text-align: center; box-shadow: 0 12px 34px rgba(7,27,80,.06); }
.contact-card h3 { font-size: 18px; }
.contact-card .email { font-size: 19px; font-weight: 600; word-break: break-all; font-family: var(--font-en); }
.contact-card p { font-size: 15px; }
.contact-main {
  background: var(--white); max-width: 760px; margin: 0 auto 50px; text-align: center;
  padding: 56px 40px; box-shadow: 0 18px 46px rgba(7,27,80,.08); border-top: 4px solid var(--orange);
}
.contact-main .email { display: inline-block; font-size: clamp(24px, 3.6vw, 36px); font-weight: 700; color: var(--brand); font-family: var(--font-en); letter-spacing: .02em; margin: 6px 0 22px; word-break: break-all; }
.contact-main .email:hover { color: var(--orange-dark); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.copy-btn.done { background: #2bb673; border-color: #2bb673; }

/* corpus */
.corpus-table { width: 100%; border-collapse: collapse; background: var(--white); font-size: 15px; }
.corpus-table th, .corpus-table td { padding: 13px 18px; border-bottom: 1px solid var(--line); text-align: left; }
.corpus-table thead th { background: var(--navy); color: var(--white); font-weight: 600; }
.corpus-table tbody tr:hover { background: #fffaf2; }
.corpus-table td:last-child { color: var(--muted); font-family: var(--font-en); }

/* news */
.news-card { background: var(--white); display: flex; flex-direction: column; transition: transform .3s, box-shadow .3s; height: 100%; }
.news-card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(7, 27, 80, .1); }
.news-card .thumb { aspect-ratio: 700 / 441; overflow: hidden; background: #eef0f4; }
.news-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-card:hover .thumb img { transform: scale(1.05); }
.news-card .body { padding: 22px 24px 26px; text-align: center; display: flex; flex-direction: column; flex: 1; }
.news-card h3 { font-size: 17px; line-height: 1.5; margin-bottom: 6px; }
.news-card h3 a { color: var(--orange-dark); }
.news-card h3 a:hover { color: var(--brand); }
.news-card time { font-size: 13px; color: var(--muted); display: block; margin-bottom: 10px; }
.news-card p { font-size: 14px; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

.article { max-width: 820px; margin: 0 auto; }
.article-meta { color: var(--muted); font-size: 14px; margin-bottom: 30px; }
.article img { margin: 26px auto; }
.article h2 { font-size: 26px; margin-top: 1.6em; }
.article h3 { font-size: 20px; margin-top: 1.4em; }
.article li { margin-bottom: 8px; }
.article hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }
.back { display: inline-block; margin-top: 40px; font-weight: 600; }
.back::before { content: "‹ "; }

/* ---------- Footer ---------- */
.site-footer { background: var(--bg-light); padding: 70px 0 30px; font-size: 14px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 50px; padding-bottom: 40px; border-bottom: 1px solid #e3e5ea; }
.footer-brand { display: flex; align-items: center; gap: 16px; color: #313131; margin-bottom: 18px; }
.footer-brand img { width: 34px; }
.footer-brand .brand-name { font-size: 24px; color: #313131; }
.footer-brand .brand-sub { color: #555; font-size: 12px; }
.site-footer h4 { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 14px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 6px; }
.site-footer a { color: var(--text); }
.site-footer a:hover { color: var(--orange-dark); }
.footer-bottom { padding-top: 26px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 13px; }
.footer-bottom .langs a { margin-left: 14px; color: var(--muted); }
.footer-bottom .langs a[aria-current="true"] { color: var(--heading); font-weight: 600; }

.to-top {
  position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px; border-radius: 50%;
  background: var(--navy); color: var(--white); border: 0; display: grid; place-items: center;
  opacity: 0; pointer-events: none; transition: opacity .3s; cursor: pointer; z-index: 40;
}
.to-top.show { opacity: .85; pointer-events: auto; }
.to-top svg { width: 18px; height: 18px; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

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

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .nav a { padding: 8px 8px; font-size: 13px; }
}
@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed; inset: 0 0 0 auto; width: min(320px, 86vw); background: var(--navy-deep);
    flex-direction: column; align-items: stretch; padding: 90px 26px 30px; gap: 0;
    transform: translateX(100%); transition: transform .35s ease; overflow-y: auto; z-index: 60;
  }
  .nav.open { transform: none; box-shadow: -10px 0 40px rgba(0,0,0,.3); }
  .nav a { font-size: 16px; padding: 12px 4px; border-bottom: 1px solid rgba(255,255,255,.08); }
  .nav .btn { margin: 22px 0 0; text-align: center; border-bottom: 0; }
  .lang { margin: 20px 0 0; }
  .lang-btn { display: none; }
  .lang-menu { display: flex !important; position: static; background: transparent; box-shadow: none; padding: 0; gap: 8px; }
  .lang-menu a { color: rgba(255,255,255,.8); border: 1px solid rgba(255,255,255,.25); border-radius: 999px; padding: 4px 14px; font-size: 13px; }
  .lang-menu a[aria-current="true"], .lang-menu a:hover { background: var(--orange); color: var(--navy); border-color: var(--orange); }
  .nav-toggle { position: relative; z-index: 70; }
  body.nav-open { overflow: hidden; }

  .grid-3, .grid-4, .growth, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .split, .vision, .logo-hero, .person { grid-template-columns: 1fr; gap: 40px; }
  .split.reverse > :first-child { order: 0; }
  .person img { max-height: 420px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-top > :first-child { grid-column: 1 / -1; }
  .stems { grid-template-columns: repeat(5, 1fr); }
  .vision-mark { max-width: 260px; margin: 0 auto; }
}
@media (max-width: 640px) {
  :root { --header-h: 72px; }
  .wrap { padding: 0 16px; }
  .section { padding: 70px 0; }
  .service { padding: 64px 0; }
  .grid-2, .grid-3, .grid-4, .growth, .contact-grid, .feature-list { grid-template-columns: 1fr; }
  .hero { min-height: 560px; height: 92vh; }
  .hero-mark { display: none; }
  .page-hero { min-height: 320px; padding-bottom: 80px; }
  .brand-name { font-size: 17px; }
  .card, .card-dark, .pillar { padding: 34px 24px; }
  .person-body { padding: 30px 22px; }
  .contact-main { padding: 40px 20px; }
  .concept { grid-template-columns: 74px 1fr; gap: 18px; }
  .concept img { width: 74px; }
  .info-table th { width: 36%; }
  .footer-top { grid-template-columns: 1fr; }
  .corpus-table th, .corpus-table td { padding: 10px 10px; font-size: 14px; }
}