body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
h1 {
    /* font-size: 32px; */
    color: #2c3e50;
    text-align: center;
    padding-bottom: 20px;
    border-bottom: 2px solid #eee;
}
h2 {
    /* font-size: 30px; */
    color: #2c3e50;
    margin-top: 30px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}
h3 {
    /* font-size: 26px; */
    color: #34495e;
    margin-top: 20px;
}
ul, ol {
    /* font-size: 24px; */
    padding-left: 20px;
}
li {
    /* font-size: 24px; */
    margin: 5px 0;
}
p {
    /* font-size: 24px; */
}
section > :not(h1, h2, h3) {
    margin-left: 30px !important;
}
a{
    color: #0000EE;
}
.TopMenu {
    align-items: right;
    display: flex;
    justify-content: right;
    gap: 10px;
    font-weight: bold;
}
.teikyo {
    display: flex;
    font-size: 20px;
    justify-content: center;
    font-weight: bold;
}
.flex-center {
    display: flex;
    justify-content: center;
    margin-left: 0;
}
.base_image {
    width: 900px;
    margin-left: 0;
}
.base-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
.base-table th, .base-table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}
.base-table th {
    background-color: #f5f5f5;
}
.price-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
.price-table th, .price-table td {
    border: 1px solid #ddd;
    padding: 12px;
    text-align: left;
}
.price-table th {
    background-color: #f5f5f5;
}
.note {
    font-size: 0.9em;
    color: #666;
    margin-top: 10px;
}
.flow-list {
    list-style-type: none;
    counter-reset: flow-counter;
    padding-left: 0;
}
.flow-list li {
    counter-increment: flow-counter;
    margin: 10px 0;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 4px;
}
.flow-list li::before {
    content: counter(flow-counter) ". ";
    font-weight: bold;
    color: #2c3e50;
}
/* コンテキストメニューのスタイル */
.context-menu {
    display: none;
    position: fixed;
    background: white;
    border: 1px solid #ccc;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.2);
    border-radius: 4px;
    padding: 5px 0;
    z-index: 1000;
}
.context-menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
.context-menu li {
    padding: 8px 15px;
    cursor: pointer;
    margin: 0;
}
.context-menu li:hover {
    background-color: #f0f0f0;
}
/* 目次のスタイル */
.table-of-contents {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 4px;
    margin: 20px 0;
}
.table-of-contents h2 {
    margin-top: 0;
    border-bottom: none;
}
.table-of-contents ul {
    list-style: none;
    padding-left: 0;
}
.table-of-contents li {
    margin: 5px 0;
}
.table-of-contents a {
    color: #2c3e50;
    text-decoration: none;
}
.table-of-contents a:hover {
    text-decoration: underline;
}

/* キャンペーン */
.campaign-price {
    color: #ff0000;
    font-weight: bold;
    margin-left: 10px;
}

.campaign-label {
    font-size: 0.8em;
    color: #ffffff;
    background-color: #ff0000;
    padding: 2px 5px;
    border-radius: 3px;
    display: inline-block;
    margin-left: 10px;
}

/* 宣伝 */
.senden-top {
    position: relative;
    /* background: linear-gradient(to right, #2563eb, #1d4ed8); */
    /* color: white; */
    padding: 2rem;
    /* border-radius: 0.5rem; */
    /* box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1); */
    overflow: hidden;
    margin: 2rem auto;
    max-width: 900px;
    border: solid;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
}

.circle-1 {
    top: 0;
    right: 0;
    width: 16rem;
    height: 16rem;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(8rem, -8rem);
    filter: blur(70px);
}

.circle-2 {
    bottom: 0;
    left: 0;
    width: 12rem;
    height: 12rem;
    background: rgba(59, 130, 246, 0.2);
    transform: translate(-6rem, 6rem);
    filter: blur(50px);
}

.content-wrapper {
    position: relative;
    z-index: 1;
}

.header-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.limited-badge {
    background-color: #ee92f1;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-weight: bold;
    font-size: 0.875rem;
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.main-title {
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.75rem;
    border-radius: 0.5rem;
    backdrop-filter: blur(4px);
}

.feature-icon {
    width: 1.25rem;
    height: 1.25rem;
    display: inline-block;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.code-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='black'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M10 20l4-16m4 4l4 4-4 4M6 16l-4-4 4-4'/%3E%3C/svg%3E");
}

.lock-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='black'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z'/%3E%3C/svg%3E");
}

.shield-icon {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='black'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M9 12l2 2 4-4m5.618-4.016A11.955 11.955 0 0112 2.944a11.955 11.955 0 01-8.618 3.04A12.02 12.02 0 003 9c0 5.591 3.824 10.29 9 11.622 5.176-1.332 9-6.03 9-11.622 0-1.042-.133-2.052-.382-3.016z'/%3E%3C/svg%3E");
}

.cta-button {
    display: inline-block;
    background-color: black;
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: solid white;
}

.cta-button:hover {
    background-color: #f8fafc;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
    color: black;
    border: solid;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: .7;
    }
}

@media (max-width: 640px) {
    .header-group {
        flex-direction: column;
        align-items: flex-start;
    }

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