/*--------------------------------------------------------------
# General
--------------------------------------------------------------*/
:root {
  --primary-color: #0056b3;
  --secondary-color: #ff6b00;
  --dark-color: #343a40;
  --light-color: #f8f9fa;
  --gray-color: #6c757d;
  --white-color: #ffffff;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: #444444;
  background-color: #f8f9fa;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

a {
  color: #FF6F00;
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--secondary-color);
  text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
}

.section-bg {
  background-color: #f7f7f7;
}

.section-padding {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  padding-bottom: 40px;
}

.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  position: relative;
  margin-bottom: 20px;
  padding-bottom: 20px;
  color: var(--dark-color);
}

.section-header h2::after {
  content: '';
  position: absolute;
  display: block;
  width: 50px;
  height: 3px;
  background: #FF6F00;
  bottom: 0;
  left: calc(50% - 25px);
}

.section-header p {
  margin-bottom: 0;
  font-size: 18px;
  color: var(--gray-color);
}

/*--------------------------------------------------------------
# Preloader
--------------------------------------------------------------*/
#preloader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  background-color: var(--white-color);
  display: flex;
  justify-content: center;
  align-items: center;
}

#preloader .loader {
  width: 40px;
  height: 40px;
  border: 4px solid #f3f3f3;
  border-top: 4px solid #FF6F00;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/*--------------------------------------------------------------
# Back to top button
--------------------------------------------------------------*/
.back-to-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: 15px;
  z-index: 996;
  background: #FF6F00;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: all 0.4s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top i {
  font-size: 24px;
  color: var(--white-color);
}

.back-to-top:hover {
  background: var(--secondary-color);
  color: var(--white-color);
}

.back-to-top.active {
  visibility: visible;
  opacity: 1;
}

/*--------------------------------------------------------------
# Header
--------------------------------------------------------------*/
#header {
  height: 80px;
  transition: all 0.5s;
  z-index: 997;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0px 2px 15px rgba(0, 0, 0, 0.1);
}

#header .logo img {
  max-height: 50px;
  margin-top: 15px;
}

/*--------------------------------------------------------------
# Desktop Navigation
--------------------------------------------------------------*/
.main-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.main-nav > ul > li {
  position: relative;
  white-space: nowrap;
  float: left;
}

.main-nav a {
  display: block;
  position: relative;
  color: #333333;
  padding: 28px 15px;
  transition: all 0.3s ease;
  font-size: 15px;
  font-weight: 500;
}

.main-nav a:hover {
  color: #FF6F00;
}

.main-nav a:after {
  content: '';
  position: absolute;
  width: 0;
  height: 3px;
  bottom: 20px;
  left: 15px;
  background-color: #FF6F00;
  transition: width 0.3s ease;
}

.main-nav a:hover:after {
  width: calc(100% - 30px);
}

.main-nav .active > a {
  color: #FF6F00;
  font-weight: 700;
}

.main-nav .active > a:after {
  width: calc(100% - 30px);
}

/*--------------------------------------------------------------
# Mobile Navigation
--------------------------------------------------------------*/
.mobile-menu {
  position: absolute;
  right: 15px;
  top: 15px;
  cursor: pointer;
  z-index: 1000;
}

.mobile-menu i {
  font-size: 28px;
  color: #FF6F00;
  padding: 8px;
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.mobile-menu i:hover {
  color: var(--secondary-color);
  transform: scale(1.1);
}

.mobile-nav-menu {
  position: fixed;
  top: 60px;
  right: -100%;
  width: 80%;
  max-width: 300px;
  height: calc(100vh - 60px);
  background: var(--white-color);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
  padding: 20px;
  overflow-y: auto;
  transition: all 0.3s ease;
  z-index: 999;
}

.mobile-nav-menu.active {
  right: 0;
}

.mobile-nav-menu ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mobile-nav-menu ul li {
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  margin-bottom: 5px;
}

.mobile-nav-menu ul li:last-child {
  border-bottom: none;
}

.mobile-nav-menu ul li a {
  display: block;
  padding: 15px;
  color: #333333;
  font-weight: 500;
  border-radius: 5px;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
}

.mobile-nav-menu ul li a:hover {
  color: #FF6F00;
  background-color: rgba(0, 86, 179, 0.1);
  border-left: 3px solid #FF6F00;
  padding-left: 20px;
}

.mobile-nav-menu ul li.active a {
  color: #FF6F00;
  background-color: rgba(0, 86, 179, 0.1);
  border-left: 3px solid #FF6F00;
  font-weight: 700;
}

.mobile-nav-menu ul li a:before {
  content: "›";
  margin-right: 10px;
  transition: all 0.3s ease;
}

.mobile-nav-menu ul li a:hover:before {
  margin-right: 15px;
}

/*--------------------------------------------------------------
# Hero Section
--------------------------------------------------------------*/
#hero {
  width: 100%;
  height: 100vh;
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url("../images/banner-image.png") center center;
  background-size: cover;
  position: relative;
  padding: 0;
  margin-bottom: -80px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

#hero h1 {
  margin: 0 0 20px 0;
  font-size: 48px;
  font-weight: 700;
  line-height: 56px;
  color: var(--white-color);
}

#hero p {
  color: var(--white-color);
  margin-bottom: 30px;
  font-size: 24px;
}

#hero .hero-buttons .btn-primary {
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 1px;
  display: inline-block;
  padding: 12px 30px;
  border-radius: 50px;
  transition: 0.5s;
  color: var(--white-color);
  background: #FF6F00;
  margin-right: 10px;
}

#hero .hero-buttons .btn-outline {
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 1px;
  display: inline-block;
  padding: 12px 30px;
  border-radius: 50px;
  transition: 0.5s;
  color: var(--white-color);
  border: 2px solid var(--white-color);
}

#hero .hero-buttons .btn-primary:hover {
  background: var(--secondary-color);
}

#hero .hero-buttons .btn-outline:hover {
  background: var(--white-color);
  color: #FF6F00;
}

.animated {
  animation-duration: 1s;
  animation-fill-mode: both;
}

.fadeInDown {
  animation-name: fadeInDown;
}

.fadeInUp {
  animation-name: fadeInUp;
}

.delay-1s {
  animation-delay: 0.5s;
}

.delay-2s {
  animation-delay: 1s;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translate3d(0, -50px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate3d(0, 50px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

/*--------------------------------------------------------------
# Page Title Section
--------------------------------------------------------------*/
#page-title {
  width: 100%;
  height: 300px;
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url("../images/page-title-bg.jpg") center center;
  background-size: cover;
  position: relative;
  padding: 0;
  margin-bottom: 0;
  display: flex;
  align-items: center;
}

#page-title h1 {
  margin: 0 0 10px 0;
  font-size: 36px;
  font-weight: 700;
  color: var(--white-color);
}

#page-title p {
  color: var(--white-color);
  margin-bottom: 0;
  font-size: 18px;
}

/*--------------------------------------------------------------
# Services Section
--------------------------------------------------------------*/
.service-box {
  padding: 30px;
  position: relative;
  overflow: hidden;
  background: var(--white-color);
  box-shadow: 0 0 29px 0 rgba(68, 88, 144, 0.12);
  transition: all 0.3s ease-in-out;
  border-radius: 8px;
  z-index: 1;
  margin-bottom: 30px;
  min-height: 240px;
}

.service-box:hover {
  transform: translateY(-10px);
}

.service-box .icon {
  margin-bottom: 20px;
  font-size: 36px;
  color: #FF6F00;
}

.service-box h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--dark-color);
}

.service-box p {
  margin-bottom: 0;
  color: var(--gray-color);
}

/*--------------------------------------------------------------
# Technologies Section
--------------------------------------------------------------*/
.tech-content {
  background: var(--white-color);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 0 29px 0 rgba(68, 88, 144, 0.12);
  margin-bottom: 30px;
}

.tech-content h3 {
  font-size: 22px;
  margin-bottom: 20px;
  color: var(--dark-color);
  text-align: center;
}

/* Salesforce認定資格の横スクロール対応 */
.salesforce-badges-container {
  position: relative;
  width: 100%;
  overflow: hidden;
  padding: 10px 0;
}

.salesforce-badges {
  display: flex;
  animation: scroll 30s linear infinite;
  width: max-content;
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 150px;
  margin-right: 20px;
}

.badge-item img {
  height: 62px;
  width: auto;
  margin-bottom: 10px;
  transition: transform 0.3s ease;
}

.badge-item:hover img {
  transform: scale(1.1);
}

.badge-item span {
  font-size: 12px;
  color: var(--gray-color);
  line-height: 1.4;
}

.tech-stack {
  margin-top: 20px;
}

.tech-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tech-icon {
  background: #f1f1f1;
  padding: 8px 15px;
  border-radius: 20px;
  font-size: 14px;
  color: var(--dark-color);
  transition: all 0.3s ease;
}

.tech-icon:hover {
  background: #FF6F00;
  color: var(--white-color);
}

.tech-icon i {
  margin-right: 5px;
  color: #FF6F00;
}

.tech-icon:hover i {
  color: var(--white-color);
}

/* 生成AI技術のアイコンスタイル */
.tech-icon .fa-robot,
.tech-icon .fa-brain,
.tech-icon .fa-language,
.tech-icon .fa-chart-line,
.tech-icon .fa-comments,
.tech-icon .fa-file-alt {
  color: #FF6F00;
}

.tech-icon:hover .fa-robot,
.tech-icon:hover .fa-brain,
.tech-icon:hover .fa-language,
.tech-icon:hover .fa-chart-line,
.tech-icon:hover .fa-comments,
.tech-icon:hover .fa-file-alt {
  color: var(--white-color);
}

/*--------------------------------------------------------------
# About Section
--------------------------------------------------------------*/
.about-img {
  position: relative;
  margin-bottom: 30px;
}

.about-img img {
  border-radius: 8px;
  box-shadow: 0 0 29px 0 rgba(68, 88, 144, 0.12);
}

.about-content h3 {
  font-size: 26px;
  margin-bottom: 20px;
  color: var(--dark-color);
}

.company-info, .business-content {
  list-style: none;
  padding: 0;
  margin: 0 0 30px 0;
}

.company-info li, .business-content li {
  padding: 10px 0;
  display: flex;
  align-items: center;
}

.company-info li i, .business-content li i {
  font-size: 16px;
  margin-right: 10px;
  color: #FF6F00;
}

/*--------------------------------------------------------------
# Careers Section
--------------------------------------------------------------*/
.career-box {
  background: var(--white-color);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 29px 0 rgba(68, 88, 144, 0.12);
  margin-bottom: 30px;
  transition: all 0.3s ease;
}

.career-box:hover {
  transform: translateY(-10px);
}

.career-img {
  overflow: hidden;
}

.career-img img {
  transition: all 0.3s ease;
  height: 200px;
  width: 100%;
  object-fit: cover;
}

.career-box:hover .career-img img {
  transform: scale(1.1);
}

.career-content {
  padding: 20px;
}

.career-content h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

.career-content p {
  color: var(--gray-color);
  margin-bottom: 15px;
  min-height: 50px;
}

.btn-details {
  display: inline-block;
  background: #FF6F00;
  color: var(--white-color);
  padding: 8px 20px;
  border-radius: 50px;
  transition: all 0.3s ease;
}

.btn-details:hover {
  background: var(--secondary-color);
  color: var(--white-color);
}

.career-details-box {
  background: var(--white-color);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 0 29px 0 rgba(68, 88, 144, 0.12);
}

.career-details-box h3 {
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--dark-color);
}

.career-details-list {
  list-style: none;
  padding: 0;
  margin: 0 0 30px 0;
}

.career-details-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
}

.career-details-list li i {
  font-size: 16px;
  margin-right: 10px;
  color: #FF6F00;
}

.apply-info {
  background: #f8f9fa;
  padding: 20px;
  border-radius: 8px;
}

.apply-info h4 {
  font-size: 18px;
  margin-bottom: 15px;
}

.email {
  color: #FF6F00;
  font-weight: 500;
}

/*--------------------------------------------------------------
# Privacy Policy Section
--------------------------------------------------------------*/
.privacy-content {
  background: var(--white-color);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 0 29px 0 rgba(68, 88, 144, 0.12);
}

.privacy-content h3 {
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--dark-color);
}

.privacy-content h4 {
  font-size: 18px;
  margin: 25px 0 15px;
  color: var(--dark-color);
}

.privacy-content p {
  margin-bottom: 15px;
  line-height: 1.6;
}

.privacy-content ul {
  padding-left: 20px;
  margin-bottom: 20px;
}

.privacy-content ul li {
  margin-bottom: 10px;
}

/*--------------------------------------------------------------
# Map Section
--------------------------------------------------------------*/
.map-container {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 29px 0 rgba(68, 88, 144, 0.12);
}

/*--------------------------------------------------------------
# Contact Section
--------------------------------------------------------------*/
.contact-form {
  background: var(--white-color);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 0 29px 0 rgba(68, 88, 144, 0.12);
}

.form-control {
  height: 48px;
  border-radius: 0;
  border: 1px solid #ced4da;
  padding: 10px 15px;
  font-size: 14px;
}

.form-control:focus {
  border-color: #FF6F00;
  box-shadow: none;
}

textarea.form-control {
  height: auto;
}

.btn-primary {
  background: #FF6F00;
  border: none;
  padding: 10px 30px;
  color: var(--white-color);
  transition: 0.3s;
  border-radius: 50px;
}

.btn-primary:hover {
  background: var(--secondary-color);
}

.contact-info {
  background: var(--white-color);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 0 29px 0 rgba(68, 88, 144, 0.12);
  height: 100%;
}

.contact-info p {
  margin-bottom: 30px;
}

.contact-details {
  margin-top: 30px;
}

.contact-item {
  display: flex;
  margin-bottom: 20px;
}

.contact-item i {
  font-size: 20px;
  color: #FF6F00;
  margin-right: 15px;
  margin-top: 5px;
}

.contact-item p {
  margin: 0;
}

/*--------------------------------------------------------------
# Contact CTA Section
--------------------------------------------------------------*/
#contact-cta {
  padding: 60px 0;
  text-align: center;
}

#contact-cta h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--dark-color);
}

#contact-cta p {
  font-size: 18px;
  margin-bottom: 30px;
  color: var(--gray-color);
}

#contact-cta .btn-primary {
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 1px;
  display: inline-block;
  padding: 12px 30px;
  border-radius: 50px;
  transition: 0.5s;
  color: var(--white-color);
  background: #FF6F00;
}

#contact-cta .btn-primary:hover {
  background: var(--secondary-color);
}

/*--------------------------------------------------------------
# Footer
--------------------------------------------------------------*/
#footer {
  background: #00695C;
  padding: 0 0 30px 0;
  color: var(--white-color);
  font-size: 14px;
}

.footer-top {
  background: #00B894;
  padding: 60px 0 30px 0;
}

.footer-info {
  margin-bottom: 30px;
}

.footer-info h3 {
  font-size: 18px;
  margin: 0 0 20px 0;
  padding: 2px 0 2px 0;
  line-height: 1;
  font-weight: 700;
}

.footer-info p {
  font-size: 14px;
  line-height: 24px;
  margin-bottom: 0;
  color: #fff;
}

.footer-links {
  margin-bottom: 30px;
}

.footer-links h4 {
  font-size: 18px;
  margin: 0 0 20px 0;
  padding: 2px 0 2px 0;
  line-height: 1;
  font-weight: 700;
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links ul li {
  padding: 10px 0;
  display: flex;
  align-items: center;
}

.footer-links ul li:first-child {
  padding-top: 0;
}

.footer-links ul li a {
  color: rgba(255, 255, 255, 0.8);
  transition: 0.3s;
  display: inline-block;
  line-height: 1;
}

.footer-links ul li a:hover {
  color: var(--white-color);
  padding-left: 5px;
}

.footer-newsletter {
  margin-bottom: 30px;
}

.footer-newsletter h4 {
  font-size: 18px;
  margin: 0 0 20px 0;
  padding: 2px 0 2px 0;
  line-height: 1;
  font-weight: 700;
}

.footer-newsletter form {
  margin-top: 30px;
  background: #fff;
  padding: 6px 10px;
  position: relative;
  border-radius: 50px;
}

.footer-newsletter form input[type="email"] {
  border: 0;
  padding: 4px;
  width: calc(100% - 100px);
  background: transparent;
}

.footer-newsletter form input[type="email"]:focus {
  outline: none;
}

.footer-newsletter form input[type="submit"] {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  border: 0;
  background: none;
  font-size: 16px;
  padding: 0 20px;
  background: #FF6F00;
  color: var(--white-color);
  transition: 0.3s;
  border-radius: 50px;
}

.footer-newsletter form input[type="submit"]:hover {
  background: var(--secondary-color);
}

.footer-bottom {
  padding-top: 30px;
  text-align: center;
}

.copyright {
  font-size: 13px;
}

/*--------------------------------------------------------------
# Modal
--------------------------------------------------------------*/
.modal-content {
  border-radius: 8px;
  border: none;
}

.modal-header {
  background: #FF6F00;
  color: var(--white-color);
  border-radius: 8px 8px 0 0;
}

.modal-header .close {
  color: var(--white-color);
  opacity: 1;
}

.modal-body {
  padding: 30px;
}

.modal-body h3 {
  font-size: 22px;
  margin-bottom: 20px;
  color: var(--dark-color);
}

.modal-body ul {
  padding-left: 20px;
}

.modal-body ul li {
  margin-bottom: 10px;
}

.modal-footer {
  border-top: none;
}

.btn-secondary {
  background: var(--gray-color);
  border: none;
  padding: 8px 20px;
  border-radius: 50px;
}

.btn-secondary:hover {
  background: var(--dark-color);
}

/*--------------------------------------------------------------
# Responsive
--------------------------------------------------------------*/
@media (max-width: 991px) {
  #header {
    height: 60px;
  }
  
  #header .logo img {
    max-height: 40px;
    margin-top: 10px;
  }
  
  .main-nav {
    display: none;
  }
  
  #hero h1 {
    font-size: 36px;
  }
  
  #hero p {
    font-size: 18px;
  }
  
  .section-header h2 {
    font-size: 28px;
  }
}

@media (max-width: 768px) {
  #hero h1 {
    font-size: 28px;
    line-height: 36px;
  }
  
  #hero p {
    font-size: 16px;
  }
  
  .section-header h2 {
    font-size: 24px;
  }
  
  .section-padding {
    padding: 60px 0;
  }
  
  .badge-item {
    width: 120px;
  }
  
  .badge-item img {
    height: 50px;
  }
  
  #page-title {
    height: 200px;
  }
  
  #page-title h1 {
    font-size: 28px;
  }
  
  #page-title p {
    font-size: 16px;
  }
}

@media (max-width: 575px) {
  #hero .hero-buttons .btn-primary,
  #hero .hero-buttons .btn-outline {
    font-size: 14px;
    padding: 10px 20px;
  }
  
  .footer-newsletter form input[type="submit"] {
    padding: 0 10px;
    font-size: 14px;
  }
}

/* モバイルメニューのタップ効果 */
.mobile-nav-menu ul li a {
  display: block;
  padding: 15px;
  color: #333333;
  font-weight: 500;
  border-radius: 5px;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
  background-color: transparent;
}

/* タップ時のスタイル */
.mobile-nav-menu ul li a.touch-active {
  background-color: rgba(0, 86, 179, 0.1);
  color: #FF6F00;
  border-left: 3px solid #FF6F00;
}

/* アクティブなメニュー項目 */
.mobile-nav-menu ul li.active a {
  color: #FF6F00;
  background-color: rgba(0, 86, 179, 0.1);
  border-left: 3px solid #FF6F00;
  font-weight: 700;
}

/* タップ時の視覚的フィードバック */
.mobile-nav-menu ul li a:active {
  background-color: rgba(0, 86, 179, 0.2);
}

/* モバイルメニューのタップ効果 */
.mobile-nav-menu ul li a {
  display: block;
  padding: 15px;
  color: #333333;
  font-weight: 500;
  border-radius: 5px;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
  background-color: transparent;
}

/* タップ時のスタイル */
.mobile-nav-menu ul li a.touch-active,
.mobile-nav-menu ul li a.tapped {
  background-color: rgba(0, 86, 179, 0.1);
  color: #FF6F00;
  border-left: 3px solid #FF6F00;
  padding-left: 20px;
}

/* アクティブなメニュー項目 */
.mobile-nav-menu ul li.active a {
  color: #FF6F00;
  background-color: rgba(0, 86, 179, 0.1);
  border-left: 3px solid #FF6F00;
  font-weight: 700;
}

/* タップ時の視覚的フィードバック */
.mobile-nav-menu ul li a:active {
  background-color: rgba(0, 86, 179, 0.2);
}

/* タッチデバイス用のホバー効果強化 */
@media (hover: none) {
  /* タップ時のスタイル（タップ時に適用） */
  .mobile-nav-menu ul li a:active {
      color: #FF6F00;
      background-color: rgba(0, 86, 179, 0.1);
      border-left: 3px solid #FF6F00;
      padding-left: 20px;
  }
}