/* =================
  quality responsive
================= */
@media screen and (max-width: 768px) {

  .container {
    padding: 0 15px;
  }

  /* header */
    .header {
    height: 75px;
  }

  .header .container {
    max-width: 100%;
    padding: 0 16px;
  }

  .header-inner {
    height: 75px;
  }

  .header-logo {
    display: flex;
    align-items: center;
    height: 100%;
    flex-shrink: 0;
  }

  .header-logo img {
    display: block;
    height: 64px;
    width: auto;
  }

  .header-nav {
    position: fixed;
    top: 75px;
    right: -100%;
    width: 46%;
    min-width: 220px;
    height: calc(100vh - 75px);
    background: rgba(17, 17, 17, 0.98);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 34px;
    padding: 30px 18px;
    transition: right 0.3s ease;
    z-index: 999;
  }

  .header-nav.active {
    right: 0;
  }

  .nav-item {
    width: 100%;
    height: auto;
    padding: 0;
    color: #fff;
    text-align: center;
  }

  .nav-item::after {
    display: none;
  }

  .nav-en {
    font-size: 17px;
    letter-spacing: 1px;
    line-height: 1.2;
    font-weight: 500;
  }

  .nav-ja {
    font-size: 11px;
    margin-top: 6px;
    opacity: 0.75;
    line-height: 1.4;
  }

  .hamburger {
    display: block;
    width: 32px;
    height: 24px;
    z-index: 1001;
    flex-shrink: 0;
  }

  .hamburger span:nth-child(1) { top: 1px; }
  .hamburger span:nth-child(2) { top: 11px; }
  .hamburger span:nth-child(3) { top: 21px; }

  .hamburger.active span:nth-child(1) {
    top: 11px;
  }

  .hamburger.active span:nth-child(3) {
    top: 11px;
  }

  .contact-btn {
    margin-left: 0;
    width: 78%;
    height: 50px;
    background: #fff;
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
  }



  .scroll {
    bottom: 22px;
    font-size: 13px;
  }

  .scroll-line {
    height: 32px;
  }

  .scroll-line::after {
    height: 32px;
  }

  /* section title */
  .section-title {
    font-size: 40px;
    line-height: 1.1;
    margin-bottom: 24px;
  }

  .section-title span {
    font-size: 14px;
    margin-top: 10px;
    padding-top: 12px;
  }

  .section-title span::before {
    width: 60px;
  }

  /* common inner */
  .quality-effort,
  .quality-policy,
  .chemical-control,
  .iso {
    padding: 60px 0;
  }

  .quality-effort .inner,
  .quality-policy .inner,
  .chemical-control .inner,
  .iso .inner {
    width: calc(100% - 30px);
  }

  .heading h2,
  .quality-effort .heading h2,
  .quality-policy .heading h2 {
    font-size: 22px;
    line-height: 1.5;
    margin-bottom: 24px;
    padding-left: 10px;
  }

  .content p,
  .iso-text p,
  .chemical-control li,
  .policy-box li {
    font-size: 14px;
    line-height: 1.9;
  }

  /* policy */
  .policy-sign {
    margin-top: 30px;
    transform: none;
    text-align: right;
    font-size: 13px;
  }

  .policy-wrapper {
    flex-direction: column;
    gap: 30px;
    margin-top: 40px;
  }

  .policy-box h3,
  .chemical-control h3 {
    font-size: 18px;
    margin-bottom: 16px;
  }

  .policy-box ol {
    padding-left: 18px;
  }

  .policy-box li {
    margin-bottom: 22px;
    padding-bottom: 12px;
  }

  .policy-box li strong {
    font-size: 15px;
    line-height: 1.6;
  }

  /* chemical */
  .chemical-control .chemical-list {
    margin-top: 30px;
  }

  /* iso */
  .iso-wrapper {
    margin-top: 30px;
  }

  .iso-text ul {
    margin-top: 16px;
  }

  .iso-text li {
    font-size: 14px;
    line-height: 1.8;
  }

  .iso-detail {
    margin-top: 36px;
  }

  .iso-row {
    flex-direction: column;
  }

  .iso-label,
  .iso-col,
  .iso-col.full {
    width: 100%;
    padding: 16px;
    border-right: none;
  }

  .iso-label {
    border-right: none;
    border-bottom: 1px solid #ddd;
  }

  .iso-logos {
    margin-top: 32px;
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .iso-logos img {
    width: 100%;
    max-width: 320px;
    height: auto;
  }

  /* page top */
  .page-top {
    right: 20px;
    bottom: 20px;
    width: 44px;
    height: 44px;
    font-size: 18px;
  }

  /* footer */
  footer .footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 0 20px;
    gap: 24px;
  }

  .footer-left {
    text-align: center;
  }

  footer .logo {
    display: inline-block;
  }

  .footer-nav {
    justify-content: center;
    gap: 14px;
  }

  .footer-nav a {
    font-size: 14px;
    padding-right: 12px;
  }
}

/* =================
  header
================= */

@media screen and (max-width: 768px) {

  .header-nav {
    display: flex;
    position: fixed;
    top: 45px;
    right: -100%;
    width: 30%;
    height: calc(100vh - 75px);
    background: #111;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 30px;
    transition: 0.3s;
  }

  .nav-item {
    color: #fff;
    font-size: 18px;
  }

  .header-nav.active {
    right: 0;
  }

  .hamburger {
    display: block;
  }

 .contact-btn {
    color: #000;
    background: #fff;
    margin-left: 0;
    width:75%;
    text-align: center;
    height: 50px;        
    display: flex;         
    align-items: center;   
    justify-content: center;
  }

}

/* =========================
 company page responsive
========================= */

@media screen and (max-width: 768px) {

  /* 横スクロール防止 */
  html,
  body {
    width: 100%;
    overflow-x: hidden;
    background: #111;
  }

  section,
  .intro,
  .strengths,
  .flow,
  .capability,
  .quality-link,
  .cta {
    overflow-x: hidden;
  }

  /* 共通見出し */
  .section-title {
    font-size: 46px;
    margin-bottom: 30px;
    line-height: 1.05;
    word-break: break-word;
  }

  .section-title span {
    font-size: 18px;
    margin-top: 14px;
    padding-top: 14px;
  }

  .section-title span::before {
    width: 56px;
  }

  /* footer */
  .footer {
    padding-bottom: 40px;
    background: #111;
  }

  .footer-nav {
    justify-content: center;
    gap: 12px;
  }

  .footer-nav a {
    font-size: 12px;
  }

  /* page top */
  .page-top {
    right: 20px;
    bottom: 20px;
    width: 55px;
    height: 55px;
  }

}


/* =================
  company header
  TOP完全統一
================= */

@media (max-width: 768px) {

  .header {
    height: 64px;
  }

  .header.hide {
    transform: none;
  }

  .header-inner {
    height: 64px;
  }

  .header-nav {
    top: 45px;
    height: calc(100vh - 75px);
  }

  .header-logo img {
    width: 240px;
    height: auto;
  }

  .header-logo {
    transform: scale(0.88);
    transform-origin: left center;
  }

  .header {
    height: 64px;
  }

  .header.hide {
    transform: none;
  }

  .header-logo img {
    width: 240px;
    height: auto;
  }

  .header-logo {
    transform: scale(0.88);
    transform-origin: left center;
  }

  .header .container {
    padding: 0 15px !important;
  }

}

/* hero */
@media screen and (max-width: 768px) {

  .page-hero {
    position: relative;
    min-height: 55vh;
    padding: 64px 20px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-position: center;
    background-size: cover;
  }

  .page-hero .container {
    width: 100%;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  .page-hero h1 {
    font-size: 28px;
    letter-spacing: 4px;
    line-height: 1.3;
    margin: 0 0 20px;
    text-align: center;
  }

  .page-hero p {
    font-size: 16px;
    margin: 0;
    text-align: center;
  }

}