/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --neon-green: #39FF14;
    --neon-green-dark: #00FF41;
    --neon-green-light: #7AFF7A;
    --black: #000000;
    --dark-gray: #0A0A0A;
    --gray: #1A1A1A;
    --light-gray: #2A2A2A;
    --lighter-gray: #666666;
    --white: #FFFFFF;
    --off-white: #F5F5F5;
    --border-color: #1A1A1A;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    --shadow-hover: 0 4px 16px rgba(57, 255, 20, 0.15);
    --glow: 0 0 15px rgba(57, 255, 20, 0.3);
    --glow-subtle: 0 0 8px rgba(57, 255, 20, 0.2);
}

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    color: var(--white);
    background-color: var(--black);
    line-height: 1.8;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Orbitron', 'Rajdhani', 'Noto Sans JP', sans-serif;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* ボタンスタイル */
.btn {
    display: inline-block;
    padding: 16px 36px;
    border-radius: 0;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid;
    cursor: pointer;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    position: relative;
    overflow: hidden;
    background-color: transparent;
}

.btn-primary {
    color: var(--neon-green);
    border-color: var(--neon-green);
}

.btn-primary:hover {
    background-color: var(--neon-green);
    color: var(--black);
    box-shadow: var(--glow-subtle);
    transform: translateY(-3px);
}

.btn-secondary {
    color: var(--white);
    border-color: var(--white);
}

.btn-secondary:hover {
    background-color: var(--white);
    color: var(--black);
    transform: translateY(-3px);
}

.btn-outline {
    color: var(--neon-green);
    border-color: var(--neon-green);
}

.btn-outline:hover {
    background-color: var(--neon-green);
    color: var(--black);
    box-shadow: var(--glow-subtle);
}

/* ヒーローセクション */
.hero {
    background: var(--black);
    color: var(--white);
    padding: 140px 20px 120px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--gray);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(90deg, transparent 0%, rgba(57, 255, 20, 0.02) 50%, transparent 100%);
    pointer-events: none;
    z-index: 1;
}

#matrix-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 500;
    margin-bottom: 30px;
    line-height: 1.2;
    color: var(--white);
    text-shadow: 0 0 15px rgba(57, 255, 20, 0.1);
    letter-spacing: 0.08em;
    font-family: 'Orbitron', 'Rajdhani', 'Noto Sans JP', sans-serif;
}

.hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 50px;
    color: var(--lighter-gray);
    font-weight: 400;
    letter-spacing: 0.06em;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    text-transform: uppercase;
    opacity: 0.8;
}

.hero .btn {
    margin: 0 15px 15px 15px;
    min-width: 180px;
}

/* セクション */
.featured-products {
    padding: 100px 20px;
    background-color: var(--black);
}

.products-section {
    padding: 80px 20px;
    background-color: var(--black);
}

/* セクションタイトル */
.section-title {
    font-size: 2.5rem;
    font-weight: 500;
    text-align: center;
    margin-bottom: 70px;
    color: var(--white);
    position: relative;
    padding-bottom: 20px;
    letter-spacing: 0.1em;
    font-family: 'Orbitron', 'Rajdhani', 'Noto Sans JP', sans-serif;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 1px;
    background: var(--neon-green);
    box-shadow: var(--glow-subtle);
}

/* 製品グリッド */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

/* カテゴリーセクション内の製品グリッド */
.category-section .products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 0;
}

.product-card {
    background: var(--dark-gray);
    border-radius: 0;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--gray);
    position: relative;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--neon-green);
    transform: scaleX(0);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--neon-green);
}

.product-card:hover::before {
    transform: scaleX(1);
    box-shadow: var(--glow-subtle);
}

.product-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
    background: var(--gray);
    display: block;
}

.product-info {
    padding: 30px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-name {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 15px;
    color: var(--white);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.product-description {
    color: var(--lighter-gray);
    margin-bottom: 20px;
    flex-grow: 1;
    font-size: 0.95rem;
    line-height: 1.7;
    font-weight: 400;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--neon-green);
    margin-bottom: 20px;
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    text-shadow: 0 0 6px rgba(57, 255, 20, 0.15);
    letter-spacing: 0.04em;
}

.product-link {
    display: block;
    text-align: center;
    padding: 15px;
    background-color: transparent;
    color: var(--neon-green);
    text-decoration: none;
    border-radius: 0;
    font-weight: 500;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--neon-green);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 12px;
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
}

.product-link:hover {
    background-color: var(--neon-green);
    color: var(--black);
    box-shadow: var(--glow-subtle);
}

/* 特徴セクション */
.features {
    padding: 100px 20px;
    background-color: var(--dark-gray);
    border-top: 1px solid var(--gray);
    border-bottom: 1px solid var(--gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--black);
    padding: 50px 40px;
    border-radius: 0;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--gray);
    position: relative;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--neon-green);
    transform: scaleX(0);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--neon-green);
    box-shadow: var(--shadow-hover);
}

.feature-card:hover::before {
    transform: scaleX(1);
    box-shadow: var(--glow-subtle);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 8px rgba(57, 255, 20, 0.4));
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon svg {
    filter: drop-shadow(0 0 12px rgba(57, 255, 20, 0.6));
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--white);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 500;
}

.feature-card p {
    color: var(--lighter-gray);
    font-weight: 400;
    line-height: 1.8;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
    font-size: 0.95rem;
}

/* ページヘッダー */
.page-header {
    background: var(--black);
    color: var(--white);
    padding: 120px 20px 100px;
    text-align: center;
    border-bottom: 1px solid var(--gray);
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(90deg, transparent 0%, rgba(57, 255, 20, 0.02) 50%, transparent 100%);
    pointer-events: none;
}

.page-title {
    font-size: 2.8rem;
    font-weight: 500;
    margin-bottom: 20px;
    color: var(--white);
    text-shadow: 0 0 15px rgba(57, 255, 20, 0.1);
    letter-spacing: 0.1em;
    position: relative;
    z-index: 1;
    font-family: 'Orbitron', 'Rajdhani', 'Noto Sans JP', sans-serif;
}

.page-description {
    font-size: 1rem;
    color: var(--lighter-gray);
    font-weight: 400;
    letter-spacing: 0.06em;
    position: relative;
    z-index: 1;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    text-transform: uppercase;
    opacity: 0.8;
}

/* 製品詳細ページ */
.product-detail-section {
    padding: 100px 20px;
    background-color: var(--black);
}

.product-detail {
    max-width: 1200px;
    margin: 0 auto;
}

.product-detail-header {
    margin-bottom: 40px;
}

.back-link {
    color: var(--lighter-gray);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 400;
    transition: color 0.3s ease;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
}

.back-link:hover {
    color: var(--neon-green);
}

.product-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 80px;
    padding-bottom: 60px;
    border-bottom: 1px solid var(--gray);
}

.product-detail-image {
    width: 100%;
}

.detail-image {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--gray);
}

.product-detail-info {
    display: flex;
    flex-direction: column;
}

.product-category {
    font-size: 0.85rem;
    color: var(--neon-green);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 15px;
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    font-weight: 500;
}

.product-detail-name {
    font-size: 2.2rem;
    font-weight: 500;
    margin-bottom: 20px;
    color: var(--white);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.product-detail-description {
    font-size: 1rem;
    color: var(--lighter-gray);
    line-height: 1.9;
    margin-bottom: 30px;
    font-weight: 400;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
}

.product-detail-price {
    font-size: 2rem;
    font-weight: 500;
    color: var(--neon-green);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    text-shadow: 0 0 8px rgba(57, 255, 20, 0.2);
    letter-spacing: 0.04em;
}

.product-features {
    margin-top: 60px;
    margin-bottom: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--gray);
    max-width: 1200px;
}

.features-title {
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 30px;
    color: var(--white);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 15px;
}

.features-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 1px;
    background: var(--neon-green);
    box-shadow: var(--glow-subtle);
}

.features-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.features-list li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    color: var(--lighter-gray);
    font-size: 0.95rem;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
    font-weight: 400;
    line-height: 1.8;
    border-bottom: 1px solid var(--gray);
}

.features-list li:last-child {
    border-bottom: none;
}

.features-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--neon-green);
    font-size: 0.9rem;
    opacity: 0.8;
}

.product-variations {
    margin-top: 60px;
}

.variations-title {
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 40px;
    color: var(--white);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.variations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.variation-card {
    background: var(--dark-gray);
    border: 1px solid var(--gray);
    padding: 30px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.variation-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--neon-green);
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.variation-card:hover {
    border-color: var(--neon-green);
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.variation-card:hover::before {
    transform: scaleX(1);
    box-shadow: var(--glow-subtle);
}

.variation-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.variation-name {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--white);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.variation-price {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--neon-green);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    text-shadow: 0 0 6px rgba(57, 255, 20, 0.15);
}

.variation-description {
    font-size: 0.9rem;
    color: var(--lighter-gray);
    margin-bottom: 20px;
    font-weight: 400;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
}

.variation-features {
    list-style: none;
    padding: 0;
    margin-bottom: 25px;
}

.variation-features li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: var(--lighter-gray);
    font-size: 0.9rem;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
}

.variation-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--neon-green);
    font-size: 0.9rem;
    opacity: 0.8;
}

.variation-btn {
    width: 100%;
    text-align: center;
    margin-top: 10px;
}

.error-message {
    text-align: center;
    padding: 60px 20px;
    color: var(--lighter-gray);
    font-size: 1.1rem;
}

.category-section {
    margin-bottom: 80px;
}

#products-container {
    display: block;
}

.category-title {
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: 40px;
    color: var(--white);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--gray);
    position: relative;
}

.category-title::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 80px;
    height: 1px;
    background: var(--neon-green);
    box-shadow: var(--glow-subtle);
}

/* Aboutページ */
.about-content {
    padding: 80px 20px;
}

.about-section {
    margin-bottom: 80px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    padding: 50px 40px;
    background: var(--dark-gray);
    border: 1px solid var(--gray);
    position: relative;
}

.about-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 100%;
    background: var(--neon-green);
    box-shadow: var(--glow-subtle);
}

.about-section h2 {
    font-size: 1.6rem;
    margin-bottom: 30px;
    color: var(--white);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 500;
}

.about-section p {
    margin-bottom: 20px;
    color: var(--lighter-gray);
    line-height: 1.9;
    font-weight: 400;
    font-size: 0.95rem;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
}

/* お支払方法ページ */
.payment-content {
    padding: 80px 20px;
}

.payment-intro {
    max-width: 900px;
    margin: 0 auto 60px;
    text-align: center;
    padding: 40px;
    background: var(--dark-gray);
    border: 1px solid var(--gray);
}

.payment-intro p {
    color: var(--lighter-gray);
    line-height: 1.9;
    font-weight: 400;
    font-size: 1rem;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.payment-card {
    background: var(--dark-gray);
    border: 1px solid var(--gray);
    padding: 40px;
    position: relative;
    transition: all 0.3s ease;
}

.payment-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 100%;
    background: var(--neon-green);
    box-shadow: var(--glow-subtle);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.payment-card:hover {
    border-color: var(--neon-green);
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
}

.payment-card:hover::before {
    opacity: 1;
}

.payment-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--gray);
}

.payment-card-header h2 {
    font-size: 1.4rem;
    color: var(--white);
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
    margin: 0;
}

.payment-badge {
    display: inline-block;
    padding: 6px 12px;
    background: var(--neon-green);
    color: var(--black);
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.payment-card-body {
    color: var(--lighter-gray);
}

.payment-card-body p {
    line-height: 1.8;
    font-weight: 400;
    font-size: 0.95rem;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
    margin: 0;
}

.payment-note {
    max-width: 900px;
    margin: 0 auto 60px;
    padding: 40px;
    background: var(--dark-gray);
    border: 1px solid var(--gray);
    border-left: 3px solid var(--neon-green);
}

.payment-note h3 {
    font-size: 1.3rem;
    color: var(--white);
    margin-bottom: 20px;
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
}

.payment-note ul {
    list-style: none;
    padding: 0;
}

.payment-note li {
    color: var(--lighter-gray);
    line-height: 1.9;
    font-weight: 400;
    font-size: 0.95rem;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
    margin-bottom: 12px;
    padding-left: 20px;
    position: relative;
}

.payment-note li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--neon-green);
    font-weight: 600;
}

.payment-cta {
    text-align: center;
    margin-top: 60px;
}

/* ガイドページ */
.guide-content {
    padding: 80px 20px;
}

.guide-section {
    max-width: 900px;
    margin: 0 auto;
}

.step-card {
    background: var(--dark-gray);
    border: 1px solid var(--gray);
    padding: 40px;
    margin-bottom: 40px;
    position: relative;
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 100%;
    background: var(--neon-green);
    box-shadow: var(--glow-subtle);
}

.step-number {
    display: inline-block;
    background: var(--neon-green);
    color: var(--black);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 8px 16px;
    margin-bottom: 20px;
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.step-card h3 {
    font-size: 1.4rem;
    color: var(--white);
    margin-bottom: 20px;
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
}

.step-card p {
    color: var(--lighter-gray);
    line-height: 1.9;
    margin-bottom: 15px;
    font-weight: 400;
    font-size: 0.95rem;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
}

.guide-link {
    color: var(--neon-green);
    text-decoration: none;
    border-bottom: 1px solid var(--neon-green);
    transition: all 0.3s ease;
    font-weight: 500;
}

.guide-link:hover {
    color: var(--neon-green-light);
    border-bottom-color: var(--neon-green-light);
}

.warning-box {
    max-width: 900px;
    margin: 60px auto 0;
    padding: 40px;
    background: rgba(255, 193, 7, 0.05);
    border: 1px solid rgba(255, 193, 7, 0.3);
    border-left: 3px solid #ffc107;
}

.warning-box h3 {
    color: #ffc107;
    font-size: 1.3rem;
    margin-bottom: 20px;
    font-family: 'Rajdhani', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
}

.warning-box ul {
    list-style: none;
    padding: 0;
}

.warning-box li {
    color: var(--lighter-gray);
    line-height: 1.9;
    margin-bottom: 15px;
    font-weight: 400;
    font-size: 0.95rem;
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
    padding-left: 20px;
    position: relative;
}

.warning-box li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #ffc107;
    font-weight: 600;
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: 15px 0;
    padding-left: 30px;
    position: relative;
    color: var(--lighter-gray);
    font-size: 0.95rem;
    line-height: 1.8;
    border-bottom: 1px solid var(--gray);
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    letter-spacing: 0.02em;
    font-weight: 400;
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--neon-green);
    font-weight: 400;
    font-size: 1rem;
    text-shadow: 0 0 8px rgba(57, 255, 20, 0.3);
    opacity: 0.8;
}

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

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .hero {
        padding: 100px 20px 80px;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 50px;
    }

    .page-title {
        font-size: 2rem;
    }

    .page-description {
        font-size: 0.875rem;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .features {
        padding: 80px 20px;
    }

    .hero .btn {
        display: block;
        margin: 15px 0;
        width: 100%;
    }

    .about-content {
        padding: 60px 20px;
    }

    .about-section {
        padding: 30px 20px;
    }

    .about-section h2 {
        font-size: 2rem;
    }

    .payment-content {
        padding: 60px 20px;
    }

    .payment-intro {
        padding: 30px 20px;
    }

    .payment-methods {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .payment-card {
        padding: 30px 20px;
    }

    .payment-card-header h2 {
        font-size: 1.2rem;
    }

    .payment-note {
        padding: 30px 20px;
    }

    .guide-content {
        padding: 60px 20px;
    }

    .step-card {
        padding: 30px 20px;
    }

    .step-card h3 {
        font-size: 1.2rem;
    }

    .warning-box {
        padding: 30px 20px;
    }

    .product-detail-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .category-title {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .page-title {
        font-size: 1.8rem;
    }

    .product-card {
        border-width: 1px;
    }

    .feature-card {
        padding: 40px 30px;
    }
}