ダークモードアコーディオン

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    <span>Section 1</span>
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    <p>Content for section 1.</p>
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    <span>Section 2</span>
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      <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"></path>
    </svg>
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    <p>Content for section 2.</p>
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    <span>Section 3</span>
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      <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"></path>
    </svg>
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    <p>Content for section 3.</p>
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