/* Reset & Basic Styles */
:root {
    --primary-color: #1e90ff;
    --secondary-color: #ffc107;
    --text-color: #333;
    --bg-color: #fff;
    --light-gray: #f8f9fa;
    --dark-blue: #003d7e;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 50px;
}
.section-title .highlight, .hero-title .highlight {
    color: var(--primary-color);
    background: linear-gradient(transparent 60%, var(--secondary-color) 60%);
    padding: 0 5px;
}
.text-center {
    text-align: center;
}

/* Header */
.header {
    background-color: #fff;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--primary-color);
    margin: 0;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 100px 0;
    color: #fff;
    text-align: center;
}
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('hero.jpg') no-repeat center center/cover;
    filter: brightness(0.9);
    z-index: -1;
}
.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.3;
    margin: 10px 0 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}
.hero-title .large-text {
    font-size: 5rem;
}
.hero-sub-text {
    font-size: 1.2rem;
    font-weight: 700;
}
.hero-sub-text .highlight-yellow {
    background-color: var(--secondary-color);
    color: var(--text-color);
    padding: 3px 8px;
    border-radius: 4px;
}
.hero-description {
    font-size: 1.3rem;
    margin-bottom: 30px;
    background-color: rgba(0,0,0,0.3);
}
.hero-area {
    display: inline-block;
    padding: 5px 15px;
    border-radius: 5px;
    margin-bottom: 40px;
    color: #000;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 5px;
}
.btn-icon {
    margin-right: 10px;
    width: 24px;
    height: 24px;
}
.btn-primary {
    background-color: #00b900; /* LINE Green */
    color: #fff;
}
.btn-primary:hover {
    background-color: #009e00;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.btn-secondary {
    background-color: var(--primary-color);
    color: #fff;
}
.btn-secondary:hover {
    background-color: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* Problem Section */
.problem {
    padding: 80px 0;
    background-color: var(--light-gray);
    text-align: center;
}
.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}
.problem-item {
  position: relative;
  display: inline-block;
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border: 2px solid #eee;
}
.problem-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  border-style: solid;
  border-width: 0 15px 20px 15px;
  border-color: transparent transparent #fff;
  translate: -50% -100%;
filter: drop-shadow(1px 0px 0px rgba(0, 0, 0, .2));
}
.problem-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: #777;
}
.problem-text .strong {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Solution Section */
.solution {
    padding: 80px 0;
    background: url('choise-bg.jpg') no-repeat center center/cover;
}
.solution .company-name {
    font-weight: 900;
}
.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 50px;
}
.solution-item {
    background: var(--light-gray);
    padding: 25px;
    border-radius: 5px;
    text-align: center;
    border: 1px solid var(--primary-color);
}
.solution-icon {
    font-size: 2rem;
    margin-bottom: 15px;
}
.solution-title {
    font-size: 1.2rem;
    margin-top: 0;
    margin-bottom: 10px;
}

/* Flow Section */
.flow {
    padding: 80px 0;
    background-color: var(--light-gray);
}
.flow-steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    margin-top: 50px;
}
.flow-step {
    padding: 30px;
    flex: 1;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    background-color: #fff;
    border: 2px solid #eee;
}
.step-number {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 5px 20px;
    border-radius: 20px;
    font-weight: 700;
    margin-bottom: 20px;
}
.step-image {
    width: 100%;
    max-width: 300px;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.flow-arrow {
    font-size: 2.5rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-top: 100px;
}
.flow-annot {
    margin: 20px 0 0 15px;
    font-size: .8rem;
}
/* FAQ Section */
.faq {
    padding: 80px 0;
    background-color: #fff;
    background: url('faq-bg.jpg') no-repeat center center/cover;
}
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    background-color: var(--light-gray);
}
.faq-q {
    display: flex;
    align-items: flex-start;
    padding: 20px;
    background-color: #fff;
    cursor: pointer;
    font-weight: 700;
    position: relative;
}
.faq-q::after {
    content: '+';
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}
.faq-item.active .faq-q::after {
    transform: translateY(-50%) rotate(45deg);
}
.faq-q span {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-right: 15px;
}
.faq-q p, .faq-a p {
    margin: 0;
}
.faq-a {
    display: none;
    padding: 20px;
    background: var(--light-gray);
}
.faq-a.active {
    display: flex;
}
.faq-a span {
    color: #e67e22;
    font-weight: 700;
    font-size: 1.2rem;
    margin-right: 15px;
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: var(--dark-blue);
    color: #fff;
    text-align: center;
}
.contact-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
}
.contact-description {
    max-width: 800px;
    margin: 0 auto 40px;
    font-size: 1.1rem;
}
.form-container {
    max-width: 700px;
    margin: 60px auto 0;
    background-color: #fff;
    padding: 40px;
    border-radius: 10px;
    color: var(--text-color);
    text-align: left;
}
.form-container h3 {
    text-align: center;
    margin-top: 0;
    font-size: 1.5rem;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 700;
}
.form-group .required {
    background-color: #dc3545;
    color: #fff;
    font-size: 0.8rem;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 8px;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    box-sizing: border-box;
}
.btn-submit {
    width: 100%;
    background-color: var(--secondary-color);
    color: var(--text-color);
    font-size: 1.2rem;
    padding: 15px;
}
.btn-submit:hover {
    background-color: #ffca2c;
}
/* Footer */
.footer {
    background-color: #343a40;
    color: #fff;
    padding: 30px 0;
    text-align: center;
    font-size: 0.9rem;
}
.footer p {
    margin: 5px 0;
}
.footer a {
    color: #fff;
    text-decoration: none;    
}
.footer a:visited {
    color: #fff;
    text-decoration: none;    
}
.footer a:hover {
    text-decoration: underline;    
}
.white {
    color: #fff !important;
}
.error {
    color: #FF0000;
}
.form-notice {
    color: #FF0000;
}
/* Responsive */
@media (max-width: 992px) {
    .solution-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .section-title { font-size: 1.8rem; }
    .hero-title { font-size: 2.5rem; }
    .hero-title .large-text { font-size: 3.5rem; }
    .hero-description { font-size: 1.1rem; }
    .hero-cta-buttons { display: flex; flex-direction: column; }

    .flow-steps { flex-direction: column; align-items: center; }
    .flow-arrow { transform: rotate(90deg); margin: 0; }
    
    .faq-q, .faq-a { padding: 15px; }
}