:root {
    --primary-color: #2c3e50;
    --secondary-color: #e67e22;
    --background-color: #f8f9fa;
    --text-color: #2c3e50;
    --accent-color: #3498db;
    --card-background: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ヘッダー */
.header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: 700;
    transition: transform 0.3s ease;
}

.logo h1:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* ヒーローセクション */
.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('Image_fx (16).jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    color: white;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(0,0,0,0.7), rgba(0,0,0,0.3));
    animation: gradientShift 10s ease infinite;
}

@keyframes gradientShift {
    0% { opacity: 0.5; }
    50% { opacity: 0.7; }
    100% { opacity: 0.5; }
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.cta-button {
    display: inline-block;
    padding: 1.2rem 2.5rem;
    background-color: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(230, 126, 34, 0.3);
}

.cta-button:hover {
    background-color: #d35400;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(230, 126, 34, 0.4);
}

/* セクション共通 */
section {
    padding: 6rem 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--secondary-color);
}

/* 会社概要 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: center;
}

.about-text {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s ease;
}

.about-text.visible {
    opacity: 1;
    transform: translateX(0);
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature {
    text-align: center;
    padding: 2.5rem 2rem;
    background-color: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
}

.feature.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.feature i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.feature:hover i {
    transform: scale(1.1);
}

/* 事業内容 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.service-card {
    background-color: white;
    padding: 3rem 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.service-card i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 2;
}

.service-card:hover i {
    transform: scale(1.1) rotate(5deg);
}

.service-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-top: 1.5rem;
    transition: transform 0.3s ease;
}

.service-card:hover .service-image {
    transform: scale(1.05);
}

/* 施工事例 */
.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, auto);
    gap: 2.5rem;
    margin: 0 auto;
    max-width: 1200px;
}

.work-card {
    background-color: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.work-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.work-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.work-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.work-card:hover img {
    transform: scale(1.05);
}

.work-card h3 {
    padding: 1.5rem 1.5rem 0.5rem;
    color: var(--primary-color);
    font-size: 1.3rem;
}

.work-card p {
    padding: 0 1.5rem 1rem;
    color: #666;
    flex-grow: 1;
}

.work-details {
    padding: 0 1.5rem 1.5rem;
    display: flex;
    justify-content: space-between;
    color: #888;
    font-size: 0.9rem;
    margin-top: auto;
}

.work-details span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.work-details i {
    color: var(--secondary-color);
}

/* お問い合わせ */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
}

.contact-info {
    background-color: var(--primary-color);
    color: white;
    padding: 3rem 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s ease;
}

.contact-info.visible {
    opacity: 1;
    transform: translateX(0);
}

.contact-form {
    background-color: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.8s ease;
}

.contact-form.visible {
    opacity: 1;
    transform: translateX(0);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #eee;
    border-radius: 8px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--secondary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
}

.submit-button {
    background-color: var(--secondary-color);
    color: white;
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(230, 126, 34, 0.3);
}

.submit-button:hover {
    background-color: #d35400;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(230, 126, 34, 0.4);
}

/* フッター */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: 4rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-bottom: 2rem;
}

.footer-info h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

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

.footer-links a {
    color: white;
    text-decoration: none;
    margin-bottom: 0.8rem;
    display: block;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--secondary-color);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* スクロールアニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* レスポンシブデザイン */
@media (max-width: 1024px) {
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, auto);
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        padding: 1rem;
    }

    .nav-links {
        margin-top: 1rem;
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .hero h2 {
        font-size: 2.5rem;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .works-grid {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(6, auto);
        gap: 2rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .work-details {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* --- 会社概要セクション用 --- */
.box {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  padding: 2rem 1.5rem;
  margin-bottom: 2rem;
}

.about-motto h3,
.about-table h3,
.about-business h3,
.about-area h3 {
  font-size: 1.3rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
  border-left: 5px solid var(--secondary-color);
  padding-left: 0.7em;
}

.motto-list {
  list-style: decimal inside;
  padding-left: 0;
  margin: 0;
}
.motto-list li {
  margin-bottom: 0.5em;
  font-weight: 500;
}

.about-table table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1em;
}
.about-table th, .about-table td {
  border: 1px solid #eee;
  padding: 0.7em 1em;
  text-align: left;
}
.about-table th {
  background: #f7f7f7;
  color: var(--primary-color);
  width: 120px;
}

.about-business h4 {
  font-size: 1.1rem;
  color: var(--secondary-color);
  margin: 1.5em 0 0.5em 0;
}
.business-list {
  list-style: disc inside;
  margin-left: 1em;
  margin-bottom: 1em;
}
.business-list li {
  margin-bottom: 0.3em;
}
.business-notes {
  background: #f9f9f9;
  border-left: 4px solid var(--secondary-color);
  padding: 1em;
  margin-top: 1em;
  font-size: 0.98em;
  color: #444;
}

.about-area p {
  font-weight: 500;
  color: #333;
  margin: 0.5em 0 0 0;
}

@media (max-width: 768px) {
  .box {
    padding: 1.2rem 0.7rem;
  }
  .about-table th, .about-table td {
    padding: 0.5em 0.5em;
  }
}