@@ -209,7 +209,7 @@ <h2 class="hidden xl:block mx-8">
209209 <!-- モバイルの場合 -->
210210 < h2 class ="relative xl:hidden max-w-lg ">
211211 < img src ="/img/top/about-coderdojo/about-coderdojo-heading.webp " alt ="About CoderDojo " />
212- < img class ="h-full w-auto absolute right-0 top-0 w-3xs " src ="/img/top/about-coderdojo/coderdojo-logo-transparent.webp " />
212+ < img class ="h-full w-auto absolute right-0 top-0 w-3xs " src ="/img/top/about-coderdojo/coderdojo-logo-transparent.webp " alt =" CoderDojo ロゴ画像 " />
213213 </ h2 >
214214
215215 <!-- 説明文セクション -->
@@ -228,13 +228,13 @@ <h2 class="relative xl:hidden max-w-lg">
228228 <!-- DojoCon の画像 -->
229229 <!-- デスクトップの場合 -->
230230 < div class ="hidden xl:flex items-center -mx-4 xl:mt-18 justify-between ">
231- < div class ="w-2/7 mt-12 "> < img class ="w-full " src ="/img/top/about-coderdojo/coderdojo-logo-transparent.webp " /> </ div >
232- < div class ="w-2/3 mt-12 "> < img class ="w-full " src ="/img/top/about-coderdojo/dojocon.webp " /> </ div >
231+ < div class ="w-2/7 mt-12 "> < img class ="w-full " src ="/img/top/about-coderdojo/coderdojo-logo-transparent.webp " alt =" CoderDojo ロゴ画像 " /> </ div >
232+ < div class ="w-2/3 mt-12 "> < img class ="w-full " src ="/img/top/about-coderdojo/dojocon.webp " alt =" DojoCon Japan 2019 @ 名古屋の様子 " /> </ div >
233233 </ div >
234234
235235 <!-- モバイルの場合 -->
236236 < div class ="xl:hidden block m-8 ">
237- < img class ="max-w-3xl place-self-center w-full " src ="/img/top/about-coderdojo/dojocon.webp " />
237+ < img class ="max-w-3xl place-self-center w-full " src ="/img/top/about-coderdojo/dojocon.webp " alt =" DojoCon Japan 2019 @ 名古屋の様子 " />
238238 </ div >
239239</ div >
240240
263263 <!-- 写真にかぶっても視認性を確保するためのオーバーレイ -->
264264 < div class ="bg-linear-to-r from-transparent from-70% to-white hidden top-0 xl:block absolute size-full ">
265265 </ div >
266- < img class ="w-full " src ="/img/top/inspire-next/exhibit.webp " />
266+ < img class ="w-full " src ="/img/top/inspire-next/exhibit.webp " alt =" 展示会の様子 " />
267267 </ div >
268- < div class ="w-1/4 -mt-48 "> < img class ="w-full " src ="/img/top/inspire-next/fire-transparent.webp " /> </ div >
268+ < div class ="w-1/4 -mt-48 "> < img class ="w-full " src ="/img/top/inspire-next/fire-transparent.webp " alt =" 「好奇心に火をつけよう」の背景透過画像 " /> </ div >
269269 </ div >
270270</ div >
271271
274274 < div class ="max-w-3xl mx-auto ">
275275 < h2 class ="relative max-w-7xl ">
276276 < img src ="/img/top/inspire-next/inspire-next-heading.webp " alt ="Inspire Next ~好奇心に火をつけよう~ " />
277- < img class ="h-[140%] w-auto absolute right-0 -bottom-1/5 w-3xs " src ="/img/top/inspire-next/fire-transparent.webp " />
277+ < img class ="h-[140%] w-auto absolute right-0 -bottom-1/5 w-3xs " src ="/img/top/inspire-next/fire-transparent.webp " alt =" 「好奇心に火をつけよう」の背景透過画像 " />
278278 </ h2 >
279279
280280 < div class ="mt-9 leading-7 ">
@@ -292,7 +292,7 @@ <h2 class="relative max-w-7xl">
292292 </ div >
293293
294294 < div class ="max-w-3xl mx-auto mt-8 ">
295- < img class ="place-self-center w-full " src ="/img/top/inspire-next/exhibit.webp " />
295+ < img class ="place-self-center w-full " src ="/img/top/inspire-next/exhibit.webp " alt =" 展示会の様子 " />
296296 </ div >
297297</ div >
298298
@@ -368,7 +368,7 @@ <h2 class="text-4xl mt-20 sm:mt-32 xl:mt-60 2xl:mt-40 text-center">
368368</ div >
369369
370370< div class ="-mx-4 ">
371- < img class ="w-full " src ="/img/top/background1.webp " />
371+ < img class ="w-full " src ="/img/top/background1.webp " alt =" DojoCon Japan 2023 @ 奈良の様子 " />
372372</ div >
373373
374374< h2 class ="text-4xl text-center mb-12 ">
@@ -437,7 +437,7 @@ <h2 class="text-4xl text-center mb-12">
437437</ div >
438438
439439< div class ="-mx-4 ">
440- < img class ="w-full " src ="/img/top/background2.webp " />
440+ < img class ="w-full " src ="/img/top/background2.webp " alt =" micro:bit でLチカしている様子 " />
441441</ div >
442442
443443< div id ="session " class ="max-w-3xl lg:max-w-[1800px] px-8 mx-auto pt-28 -mt-28 mb-16 flex flex-col lg:-mt-64 lg:flex-row items-center lg:items-start ">
@@ -479,7 +479,7 @@ <h2 class="text-4xl mb-4 text-center lg:text-left">
479479</ div >
480480
481481< div class ="-mx-4 ">
482- < img class ="w-full " src ="/img/top/background3.webp " />
482+ < img class ="w-full " src ="/img/top/background3.webp " alt =" 鉄道模型を動かしている様子 " />
483483</ div >
484484
485485< section class ="max-w-5xl mx-auto px-4 sm:px-8 ">
@@ -611,7 +611,7 @@ <h3 class="text-2xl mt-20 text-center mb-4">インカインドスポンサー
611611</ section >
612612
613613< div class ="-mx-4 ">
614- < img class ="w-full " src ="/img/top/background4.webp " />
614+ < img class ="w-full " src ="/img/top/background4.webp " alt =" Why CoderDojo Wall - 教えて!みんなが CoderDojo に参加する理由 " />
615615</ div >
616616
617617< section class ="max-w-5xl mx-auto px-8 mb-8 ">
@@ -627,7 +627,7 @@ <h2 id="outline" class="text-4xl text-center mb-8">
627627</ section >
628628
629629< div class ="-mx-4 ">
630- < img class ="w-full " src ="/img/top/background5.webp " />
630+ < img class ="w-full " src ="/img/top/background5.webp " alt =" DojoCon Japan 2019 @ 名古屋の様子 " />
631631</ div >
632632
633633< h2 class ="text-4xl text-center ">
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