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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
    line-height: 1.8;
    color: #333;
    background-color: #fff;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Header */
header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    height: 70px;
}

.header-left {
    display: flex;
    align-items: center;
    flex: 1;
}

.logo {
    height: 40px;
    color: #C8102E;
    font-size: 24px;
    font-weight: bold;
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
}

.phone-info {
    font-size: 14px;
    color: #666;
    line-height: 1.4;
    margin-left: auto;
    margin-right: 4%;
}

.phone-number {
    font-size: 20px;
    font-weight: bold;
    color: #333;
    margin-top: 2px;
}

.phone-number img {
    height: 16px;
    vertical-align: baseline;
    margin-right: 5px;
}

.header-buttons {
    display: flex;
    gap: 20px;
}

.demo-button {
    background: #FFE5E5;
    color: #C8102E;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    font-size: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(200, 16, 46, 0.1);
}

.demo-button:hover {
    background: #FFC5C5;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(200, 16, 46, 0.2);
}

.download-button {
    background: #FFD700;
    color: #333;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    font-size: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
}

.download-button:hover {
    background: #FFC700;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

/* Hamburger Menu */
.hamburger-menu {
    display: none;
    width: 30px;
    height: 24px;
    position: relative;
    cursor: pointer;
    z-index: 1001;
}

.hamburger-menu span {
    display: block;
    position: absolute;
    height: 3px;
    width: 100%;
    background: #333;
    border-radius: 3px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    transition: 0.25s ease-in-out;
}

.hamburger-menu span:nth-child(1) {
    top: 0px;
}

.hamburger-menu span:nth-child(2) {
    top: 10px;
}

.hamburger-menu span:nth-child(3) {
    top: 20px;
}

.hamburger-menu.active span:nth-child(1) {
    top: 10px;
    transform: rotate(135deg);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
    left: -60px;
}

.hamburger-menu.active span:nth-child(3) {
    top: 10px;
    transform: rotate(-135deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100%;
    z-index: 1000;
    transition: right 0.3s ease-in-out;
}

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

.mobile-menu-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

.mobile-menu.active .mobile-menu-overlay {
    opacity: 1;
}

.mobile-menu-content {
    position: absolute;
    right: -300px;
    top: 0;
    width: 300px;
    max-width: 85%;
    height: 100%;
    background: #fff;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease-in-out;
    overflow-y: auto;
}

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

.mobile-menu-header {
    padding: 20px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-menu-logo img {
    height: 35px;
}

.mobile-menu-close {
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
}

.mobile-menu-close span {
    display: block;
    position: absolute;
    height: 2px;
    width: 20px;
    background: #333;
    left: 5px;
}

.mobile-menu-close span:nth-child(1) {
    top: 14px;
    transform: rotate(45deg);
}

.mobile-menu-close span:nth-child(2) {
    top: 14px;
    transform: rotate(-45deg);
}

.mobile-menu-body {
    padding: 30px 20px;
}

.mobile-menu-phone {
    text-align: center;
    padding: 20px;
    background: #f8f8f8;
    border-radius: 15px;
    margin-bottom: 30px;
    display: none; /* デフォルトで非表示 */
}

/* スマートフォンサイズでのみ表示 */
@media (max-width: 768px) {
    .mobile-menu-phone {
        display: block;
    }
.logo img {
    height: 25px!important;
}
.header-buttons {
    margin-right: 20px;
}
.download-button {
    padding: 1px 9px;
    font-size: 12px;
    display: block;
}
}

.mobile-menu-phone .phone-number {
    font-size: 20px;
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.mobile-menu-phone .phone-number img {
    height: 16px;
    vertical-align: baseline;
    margin-right: 5px;
}

.mobile-menu-phone small {
    font-size: 14px;
    color: #666;
    display: block;
}

.mobile-menu-phone .phone-link {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: opacity 0.3s ease;
}

.mobile-menu-phone .phone-link:hover {
    opacity: 0.8;
}

.mobile-menu-button {
    display: block;
    width: 100%;
    text-align: center;
    margin-bottom: 15px;
    padding: 15px 20px;
    font-size: 16px;
}

.mobile-menu-button.demo-button {
    background: #FFE5E5;
    color: #C8102E;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.mobile-menu-button.download-button {
    background: #FFD700;
    color: #333;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    background: url('img/hero-background.jpg') center center / cover no-repeat;
    padding: 100px 0 60px;
    margin-top: 30px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 229, 229, 0.63);
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.video-container {
    background: #000;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    padding-bottom: 56.25%;
    box-shadow: 0 30px 60px rgba(0,0,0,0.25);
    width: 100%;
    max-width: 100%;
    margin-top: 30px;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 48px;
    background: #333;
}

/* ヒーローバッジ - 新しいデザインを維持 */
.hero-badge {
    display: inline-block;
    background: linear-gradient(135deg, #C8102E 0%, #FF3D5F 100%);
    color: white;
    padding: 8px 24px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
    box-shadow: 0 4px 15px rgba(200, 16, 46, 0.3);
}

.hero-text h1 {
    font-size: 48px;
    font-weight: bold;
    color: #333;
    margin-bottom: 30px;
    line-height: 1.2;
    letter-spacing: -0.02em;
    position: relative;
    white-space: nowrap;
}

/* タイトル下のアクセントライン - 新しいデザインを維持 */
.hero-text h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100px;
    height: 4px;
    background: linear-gradient(135deg, #C8102E 0%, #FF3D5F 100%);
    border-radius: 2px;
}

.hero-text {
    padding-left: 0;
}

.hero-text p {
    font-size: 18px;
    color: #666;
    line-height: 1.7;
    letter-spacing: 0.02em;
}

/* Service Overview */
.service-overview {
    padding: 100px 0 120px;
    background: #ffffff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 30px;
}

.feature-item {
    position: relative;
    text-align: center;
    background: white;
    padding: 40px 20px;
    border-radius: 20px;
    border: 2px solid #B02418;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-color: #C8102E;
}

.feature-number {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 60px;
    font-weight: bold;
    color: #B02418;
    line-height: 1;
    z-index: 2;
    background: white;
    padding: 0 15px;
    font-style: italic;
}

.feature-image {
    width: 100%;
    height: 180px;
    margin: 40px auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 15px;
    background: #F0F2F5;
    position: relative;
}

.feature-image::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 160px;
    height: 160px;
    background: radial-gradient(circle, rgba(200, 210, 225, 0.3) 0%, transparent 70%);
    border-radius: 50%;
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 1;
}

.feature-item h3 {
    font-size: 16px;
    color: #333;
    font-weight: bold;
    line-height: 1.4;
    letter-spacing: -0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 10px;
}

/* Contact Form */
.contact-form {
    background: url('img/contact-background.jpg') center center / cover no-repeat;
    padding: 100px 0 120px;
    position: relative;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 229, 229, 0.63);
    z-index: 1;
}

.contact-form .container {
    position: relative;
    z-index: 2;
}

.section-title {
    font-size: 42px;
    text-align: center;
    color: #333;
    margin-bottom: 80px;
    font-weight: bold;
    letter-spacing: -0.02em;
    position: relative;
    padding-bottom: 20px;
}

/* 見出しの下の2本線デザイン */
.section-title::before {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: #C8102E;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: #FFD700;
}

.form-wrapper {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    padding: 60px;
    border-radius: 30px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.1);
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 80px;
}

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

/* 書籍カードデザイン */
.book-card {
    max-width: 320px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.book-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.book-card-content {
    padding: 30px 25px;
    text-align: left;
}

.book-title {
    font-size: 24px;
    font-weight: bold;
    color: #C8102E;
    margin-bottom: 8px;
    line-height: 1.3;
}

.book-subtitle {
    font-size: 16px;
    color: #666;
    margin-bottom: 20px;
    font-weight: 500;
}

.book-description {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    margin: 0;
}

.highlight-text {
    color: #C8102E;
    font-weight: bold;
}

.form-right {
    flex: 1;
}

.form-question {
    font-size: 16px;
    color: #333;
    margin-bottom: 20px;
    display: inline-block;
    font-weight: 500;
}

.radio-group {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

.radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.radio-label:hover {
    opacity: 0.8;
}

.radio-label input[type="radio"] {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    cursor: pointer;
    accent-color: #b02418;
}

.radio-text {
    font-size: 16px;
    color: #333;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

.form-group {
    margin-bottom: 30px;
}

.half-width {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
    font-size: 15px;
}

.required {
    background: #C8102E;
    color: white;
    padding: 4px 12px;
    border-radius: 8px;
    font-size: 12px;
    margin-left: 10px;
    display: inline-block;
    font-weight: normal;
    vertical-align: middle;
}

.required-asterisk {
    color: #C8102E;
    font-size: 16px;
    margin-left: 5px;
    display: inline-block;
    font-weight: bold;
    vertical-align: middle;
}

.form-group input {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #E5E5E5;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #FAFAFA;
}

.form-group input:focus {
    outline: none;
    border-color: #C8102E;
    background: white;
}

.form-note {
    font-size: 13px;
    color: #666;
    margin-top: 8px;
}

.privacy-policy {
    margin: 40px 0 25px;
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

.privacy-policy a {
    color: #C8102E;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.privacy-policy a:hover {
    text-decoration: underline;
}

.checkbox-group {
    margin-bottom: 40px;
}

.checkbox-label {
    display: flex;
    cursor: pointer;
    align-items: flex-start;
    transition: all 0.2s ease;
}

.checkbox-label:hover {
    opacity: 0.8;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    cursor: pointer;
    accent-color: #b02418;
    flex-shrink: 0;
    position: relative;
    top: 4px;
}

.checkbox-label span {
    font-size: 15px;
    color: #333;
    line-height: 1.6;
}

.submit-button {
    width: 100%;
    background: #FFD700;
    color: #333;
    padding: 18px 40px;
    border: none;
    border-radius: 35px;
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(255, 215, 0, 0.3);
}

.submit-button:hover {
    background: #FFC700;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 215, 0, 0.4);
}

/* Footer */
footer {
    background: #ffffff;
    color: #333;
    padding: 80px 0 40px;
    border-top: 2px solid #F5F5F5;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 50px;
}

.footer-logo {
    margin-bottom: 25px;
}

.footer-logo img {
    height: 35px;
    width: auto;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-column h4 {
    font-size: 18px;
    margin-bottom: 20px;
    font-weight: 600;
    color: #333;
}

.footer-column a {
    display: block;
    color: #666;
    text-decoration: none;
    margin-bottom: 15px;
    font-size: 15px;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: #C8102E;
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid #F5F5F5;
    color: #999;
    font-size: 14px;
}

/* ==============================================
   レスポンシブデザイン
   ============================================== */

/* 通常のデスクトップレイアウト: 1025?1440px */
@media (min-width: 1025px) and (max-width: 1440px) {
    .container {
        max-width: 1200px;
        padding: 0 30px;
    }
    
    .hero-text h1 {
        font-size: 44px;
    }
    
    .hero-text p {
        font-size: 17px;
    }
    
    .section-title {
        font-size: 38px;
    }
    
    .form-wrapper {
        padding: 50px;
    }
}

/* タブレット: 769?1024px */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        max-width: 960px;
        padding: 0 25px;
    }
    
    /* ヘッダー調整 */
    .phone-info {
        font-size: 13px;
        margin-right: 15%;
    }
    
    .phone-number {
        font-size: 18px;
    }
    
    .header-buttons .demo-button {
        display: none;
    }
    
    .hamburger-menu {
        display: block;
    }
    
    /* スマートフォンではヘッダーの電話番号を非表示 */
    .phone-info {
        display: none;
    }
    
    .hamburger-menu {
        display: block;
    }
    
    /* タブレットではモバイルメニュー内の電話番号を非表示 */
    .mobile-menu-phone {
        display: none;
    }
    
    /* ヒーローセクション */
    .hero {
        padding: 90px 0 50px;
    }
    
    .hero-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    
    .hero-text h1 {
        font-size: 36px;
    }
    
    .hero-text p {
        font-size: 16px;
    }
    
    .hero-badge {
        font-size: 13px;
        padding: 6px 20px;
    }
    
    /* サービス説明セクション - 2カラムグリッド */
    .service-overview {
        padding: 100px 0;
    }
    
    .features-grid {
        grid-template-columns:repeat(2, minmax(0, 1fr));
        gap: 35px;
    }
    
    .feature-number {
        font-size: 48px;
        top: -20px;
    }
    
    .feature-image {
        width: 100%;
        height: 160px;
    }
    
    .feature-item h3 {
        font-size: 16px;
    }
    
    /* フォームセクション */
    .contact-form {
        padding: 100px 0;
    }
    
    .section-title {
        font-size: 36px;
        margin-bottom: 60px;
    }
    
    .form-wrapper {
        grid-template-columns: 280px 1fr;
        padding: 50px;
        gap: 50px;
    }
    
    .book-card {
        max-width: 280px;
    }
    
    .book-title {
        font-size: 22px;
    }
    
    .book-subtitle {
        font-size: 15px;
    }
    
    /* フッター */
    footer {
        padding: 70px 0 35px;
    }
    
    .footer-links {
        gap: 60px;
    }
}

/* 標準的なモバイル: 376?768px */
@media (min-width: 376px) and (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .header-buttons .demo-button {
        display: none;
    }
    
    .hamburger-menu {
        display: block;
    }
    
    /* スマートフォンではヘッダーの電話番号を非表示 */
    .phone-info {
        display: none;
    }
    
    .hamburger-menu {
        display: block;
    }
    
    /* スマートフォンではヘッダーの電話番号を非表示 */
    .phone-info {
        display: none;
    }
    
    .hamburger-menu {
        display: block;
    }
    
    /* ヘッダー調整 */
    .phone-info {
        font-size: 12px;
        margin-right: 0;
        text-align: right;
    }
    
    .phone-number {
        font-size: 16px;
    }
    
    /* ヒーローセクション */
    .hero {
        padding: 90px 0 50px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 35px;
    }
    
    .hero-text h1 {
        font-size: 32px;
        white-space: normal;
    }
    
    .hero-text p {
        font-size: 16px;
        line-height: 1.7;
    }
    
    .hero-badge {
        font-size: 13px;
        padding: 6px 18px;
    }
    
    /* サービス説明セクション */
    .service-overview {
        padding: 80px 0;
    }
    
    .section-title {
        font-size: 30px;
        margin-bottom: 50px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 25px;
    }
    
    .feature-item {
        padding: 35px 15px;
    }
    
    .feature-number {
        font-size: 36px;
        top: -15px;
    }
    
    .feature-image {
        width: 100%;
        height: 140px;
        margin: 35px auto 15px;
    }
    
    .feature-item h3 {
        font-size: 14px;
    }
    
    /* フォームセクション */
    .contact-form {
        padding: 80px 0;
    }
    
    .form-wrapper {
        grid-template-columns: 1fr;
        padding: 35px 20px;
        gap: 35px;
    }
    
    .book-card {
        max-width: 260px;
    }
    
    .book-card img {
        height: 150px;
    }
    
    .book-title {
        font-size: 20px;
    }
    
    .book-subtitle {
        font-size: 14px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .form-left {
        order: 1;
        margin-top: 20px;
    }
    
    .form-right {
        order: 1;
    }
    
    .form-group input {
        padding: 12px 16px;
        font-size: 15px;
    }
    
    .submit-button {
        font-size: 18px;
        padding: 16px 30px;
    }
    
    /* フッター */
    footer {
        padding: 60px 0 30px;
    }
    
    .footer-links {
        flex-direction: row;
        gap: 35px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 35px;
    }
}

/* 極小画面: 375px以下 */
@media (max-width: 375px) {
    .container {
        padding: 0 15px;
    }
    
    /* ヘッダー調整 */
    nav {
        padding: 15px 0;
        height: 60px;
    }
    
    .logo {
        height: 32px;
        font-size: 20px;
    }
    
    .logo img {
        height: 32px;
    }
    
    .phone-info {
        font-size: 11px;
        margin-right: 0;
        text-align: right;
    }
    
    .phone-number {
        font-size: 14px;
    }
    
    .phone-number img {
        height: 14px;
    }
    
    .header-buttons .demo-button {
        display: none;
    }
    
    .hamburger-menu {
        display: block;
    }
    
    /* スマートフォンではヘッダーの電話番号を非表示 */
    .phone-info {
        display: none;
    }
    
    .hamburger-menu {
        display: block;
    }
    
    /* ヒーローセクション */
    .hero {
        padding: 80px 0 40px;
        margin-top: 60px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .hero-text h1 {
        font-size: 28px;
        white-space: normal;
        margin-bottom: 20px;
    }
    
    .hero-text h1::after {
        width: 80px;
        height: 3px;
    }
    
    .hero-text p {
        font-size: 15px;
        line-height: 1.6;
    }
    
    .hero-badge {
        font-size: 12px;
        padding: 5px 16px;
        margin-bottom: 12px;
    }
    
    .video-container {
        border-radius: 15px;
        box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    }
    
    /* サービス説明セクション - 1カラム化 */
    .service-overview {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 26px;
        margin-bottom: 40px;
        padding-bottom: 15px;
    }
    
    .section-title::before {
        width: 50px;
        bottom: 5px;
    }
    
    .section-title::after {
        width: 25px;
        bottom: 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-item {
        padding: 30px 15px;
        border-radius: 15px;
    }
    
    .feature-number {
        font-size: 32px;
        top: -15px;
        padding: 0 10px;
    }
    
    .feature-image {
        width: 100%;
        height: 120px;
        margin: 30px auto 15px;
        border-radius: 12px;
    }
    
    .feature-image::before {
        width: 100px;
        height: 100px;
    }
    
    .feature-item h3 {
        font-size: 13px;
        padding: 0 5px;
    }
    
    /* フォームセクション */
    .contact-form {
        padding: 60px 0;
    }
    
    .form-wrapper {
        grid-template-columns: 1fr;
        padding: 30px 15px;
        gap: 30px;
        border-radius: 20px;
    }
    
    .book-card {
        max-width: 240px;
        border-radius: 15px;
        box-shadow: 0 8px 25px rgba(0,0,0,0.08);
    }
    
    .book-card img {
        height: 130px;
    }
    
    .book-card-content {
        padding: 20px 15px;
    }
    
    .book-title {
        font-size: 18px;
        margin-bottom: 6px;
    }
    
    .book-subtitle {
        font-size: 13px;
        margin-bottom: 12px;
    }
    
    .book-description {
        font-size: 12px;
        line-height: 1.6;
    }
    
    .form-question {
        font-size: 14px;
        margin-bottom: 15px;
    }
    
    .radio-group {
        gap: 25px;
        margin-bottom: 30px;
    }
    
    .radio-label input[type="radio"] {
        width: 18px;
        height: 18px;
        margin-right: 8px;
    }
    
    .radio-text {
        font-size: 14px;
    }
    
    .form-group {
        margin-bottom: 25px;
    }
    
    .form-group label {
        font-size: 14px;
        margin-bottom: 8px;
    }
    
    .required {
        padding: 3px 10px;
        font-size: 11px;
        margin-left: 8px;
        border-radius: 6px;
    }
    
    .required-asterisk {
        font-size: 14px;
        margin-left: 3px;
    }
    
    .form-group input {
        padding: 10px 14px;
        font-size: 14px;
        border-radius: 8px;
    }
    
    .form-note {
        font-size: 12px;
        margin-top: 6px;
    }
    
    .privacy-policy {
        margin: 30px 0 20px;
        font-size: 13px;
        line-height: 1.6;
    }
    
    .checkbox-group {
        margin-bottom: 30px;
    }
    
    .checkbox-label input[type="checkbox"] {
        width: 18px;
        height: 18px;
        margin-right: 8px;
        top: 3px;
    }
    
    .checkbox-label span {
        font-size: 13px;
    }
    
    .submit-button {
        font-size: 16px;
        padding: 14px 25px;
        border-radius: 30px;
    }
    
    /* フッター */
    footer {
        padding: 50px 0 25px;
        border-top: 1px solid #F5F5F5;
    }
    
    .footer-logo img {
        height: 30px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
        margin-bottom: 40px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-column h4 {
        font-size: 16px;
        margin-bottom: 15px;
    }
    
    .footer-column a {
        font-size: 14px;
        margin-bottom: 12px;
    }
    
    .footer-bottom {
        padding-top: 30px;
        font-size: 12px;
    }
}

/* 高解像度ディスプレイ対応 */
@media (min-width: 1441px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-text h1 {
        font-size: 52px;
    }
    
    .section-title {
        font-size: 46px;
    }
    
    .form-wrapper {
        max-width: 1100px;
        grid-template-columns: 320px 1fr;
    }
}

/* 特定のデバイスサイズ向けの微調整 */
@media (max-width: 320px) {
    /* iPhone SE などの極小デバイス */
    .phone-info {
        display: none;
    }
    
    .hero-text h1 {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 22px;
    }
    
    .features-grid {
        gap: 15px;
    }
    
    .feature-item {
        padding: 25px 10px;
    }
}