/* IZUTSUYA サイト構造：トップページ用。
   テーマは html{font-size:62.5%}（1rem=10px）で、a・p・span・li・b に font-size:1.6rem; line-height:1.2 を当てているため、
   ここでは文字の大きさと行間を要素ごとに明示する。 */
.izst{--izst-blue:#00a0ff;--izst-green:#00c864;--izst-purple:#c82896;--izst-red:#e60033;--izst-line:rgba(255,255,255,.28);--izst-line2:rgba(255,255,255,.12);
  --izst-disp:"novecento-sans",sans-serif}
.izst-nw{white-space:nowrap;font-size:inherit;line-height:inherit}
.izst-center{text-align:center}

/* ボタン（テーマの「詳しくはこちら」と同じ形） */
.izst-btn{display:inline-block;position:relative;background:#fff;color:#000 !important;font-size:1.4rem;line-height:1.6;font-weight:bold;padding:.75em 3em .75em 2em;letter-spacing:.04em;transition:all .5s}
.izst-btn::after{position:absolute;top:0;bottom:0;right:12px;content:"";width:10px;height:14.72px;margin:auto;background-color:#000;-webkit-clip-path:polygon(0 0,70% 50%,0 100%);clip-path:polygon(0 0,70% 50%,0 100%);transition:all .5s}
.izst-btn:hover{background:#000;color:#fff !important}
.izst-btn:hover::after{background-color:#fff}
.izst-btn-line{background:transparent;color:#fff !important;border:1px solid #fff}
.izst-btn-line::after{background-color:#fff}
.izst-btn-line:hover{background:#fff;color:#000 !important}
.izst-btn-line:hover::after{background-color:#000}

/* ---------- FV に足す一文・ボタン・PC用ナビ ---------- */
.izst-fv-what{display:flex;align-items:center;gap:28px;margin-top:22px}
.izst-fv-what p{font-size:1.4rem;line-height:1.9;font-weight:500;letter-spacing:.04em;border-left:2px solid #fff;padding-left:16px;text-shadow:0 1px 12px rgba(0,0,0,.7)}
.izst-gnav{position:absolute;top:34px;right:104px;z-index:999}
.izst-gnav ul{display:flex;align-items:center;gap:30px}
.izst-gnav li{font-size:1.5rem;line-height:1}
.izst-gnav a{display:block;font-family:var(--izst-disp,"novecento-sans",sans-serif);font-weight:600;font-size:1.5rem;line-height:1;letter-spacing:.12em;color:#fff;text-shadow:0 1px 10px rgba(0,0,0,.6);transition:opacity .3s}
.izst-gnav a:hover{opacity:.7}
.izst-gnav .izst-gnav-cta{border:1px solid #fff;padding:9px 18px}
@media screen and (max-width:1099px){.izst-gnav{display:none}}
@media screen and (max-width:767px){
  .izst-fv-what{flex-direction:column;align-items:flex-start;gap:14px;margin-top:14px}
  .izst-fv-what p{font-size:1.3rem;line-height:1.8}
}

/* ---------- ABOUT ---------- */
.izst-cube{display:block;width:100%;height:auto}
.izst-cube-en{font-family:"novecento-sans",sans-serif;font-weight:600;letter-spacing:.08em}
.izst-cube-jp{font-weight:700;letter-spacing:.2em}
.izst-nums{display:grid;grid-template-columns:repeat(4,1fr);width:92%;max-width:900px;margin:74px auto 0;border-top:1px solid var(--izst-line);border-bottom:1px solid var(--izst-line)}
.izst-nums li{padding:26px 10px 22px;text-align:center;border-left:1px solid var(--izst-line2);font-size:1.2rem;line-height:1.6}
.izst-nums li:first-child{border-left:none}
.izst-nums b{display:block;font-family:"novecento-sans",sans-serif;font-weight:600;font-size:4.6rem;line-height:1.1;letter-spacing:.02em}
.izst-nums b.izst-nums-jp{font-family:"Yu Gothic Medium","游ゴシック Medium",YuGothic,"游ゴシック体","ヒラギノ角ゴ Pro W3","メイリオ",sans-serif;font-weight:700;font-size:3rem;line-height:1.687;letter-spacing:.08em;position:relative;top:.14em}
.izst-nums b small{position:relative;top:-.06em;font-family:"Yu Gothic Medium","游ゴシック Medium",YuGothic,"游ゴシック体","ヒラギノ角ゴ Pro W3","メイリオ",sans-serif;font-size:1.8rem;font-weight:700;margin-left:2px}
.izst-nums span{display:block;font-size:1.2rem;line-height:1.6;color:#d0d0d0;margin-top:8px;letter-spacing:.04em}
@media screen and (max-width:767px){
  .izst-nums{grid-template-columns:repeat(2,1fr);margin-top:50px}
  .izst-nums li:nth-child(odd){border-left:none}
  .izst-nums li:nth-child(n+3){border-top:1px solid var(--izst-line2)}
  .izst-nums b{font-size:3.6rem}
  .izst-nums b.izst-nums-jp{font-size:2.35rem;line-height:1.685}
}

/* ---------- 3つの事業 ---------- */
.izst-biz .s_ttl .izst-jp{display:block;margin-top:.9em;font-family:"Yu Gothic Medium","游ゴシック Medium",YuGothic,"游ゴシック体","ヒラギノ角ゴ Pro W3","メイリオ",sans-serif;font-size:1.4rem;line-height:1;font-weight:700;letter-spacing:.3em}
.izst-biz .service_info_block .s_ttl{text-shadow:0 2px 20px rgba(0,0,0,.35)}
.izst-biz .service_info_block.ver_green .s_ttl{background-image:url(../img/band_infra.webp)}
.izst-biz .service_info_block .img a{display:block;transition:opacity .5s}
.izst-biz .service_info_block .img a:hover{opacity:.8}
.izst-biz .service_info_block .img img{display:block;width:100%;height:auto}
.izst-biz .base_btn a.izst-ext{background:transparent;color:#fff;border:1px solid #fff}
.izst-biz .base_btn a.izst-ext::after{background-color:#fff}
.izst-biz .base_btn a.izst-ext:hover{background:#fff;color:#000}
.izst-biz .base_btn a.izst-ext:hover::after{background-color:#000}
.izst-flow{display:flex;gap:40px;margin:0 auto 54px}
.izst-flow li{position:relative;flex:1;border:1px solid var(--izst-line);padding:16px 14px 14px;text-align:center;background:rgba(0,0,0,.3);font-size:1.25rem;line-height:1.7}
.izst-flow li + li::before{content:"";position:absolute;left:-25px;top:50%;margin-top:-7px;border-left:9px solid var(--izst-blue);border-top:7px solid transparent;border-bottom:7px solid transparent}
.izst-flow b{display:block;font-family:"novecento-sans",sans-serif;font-weight:600;font-size:1.9rem;line-height:1.4;letter-spacing:.14em;color:var(--izst-blue)}
.izst-flow span{display:block;font-size:1.25rem;line-height:1.7;color:#dcdcdc}
@media screen and (max-width:767px){
  .izst-flow{flex-direction:column;gap:26px;margin-bottom:40px}
  .izst-flow li + li::before{left:50%;top:-18px;margin:0 0 0 -7px;border-left:7px solid transparent;border-right:7px solid transparent;border-top:9px solid var(--izst-blue);border-bottom:none}
}

/* ---------- YouTube 10万人 ---------- */
.izst-yt{position:relative;overflow:hidden;margin-top:60px;background:#0b0b0b;border-top:1px solid var(--izst-line2);border-bottom:1px solid var(--izst-line2)}
.izst-yt::before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(60% 120% at 12% 60%,rgba(230,0,51,.38),rgba(230,0,51,0) 62%),linear-gradient(100deg,rgba(230,0,51,.10),rgba(0,0,0,0) 55%)}
.izst-yt-in{position:relative;z-index:2;display:grid;grid-template-columns:auto minmax(0,1fr);gap:34px;align-items:center;width:92%;max-width:1112px;margin:auto;padding:84px 0}
.izst-yt-ch{display:flex;align-items:center;gap:10px;font-size:1.25rem;line-height:1.4;font-weight:700;letter-spacing:.08em}
.izst-yt-ch i{position:relative;display:inline-block;width:30px;height:21px;background:var(--izst-red);border-radius:5px}
.izst-yt-ch i::after{content:"";position:absolute;left:11px;top:5.5px;border-left:9px solid #fff;border-top:5px solid transparent;border-bottom:5px solid transparent}
.izst-yt-big{display:flex;align-items:baseline;gap:10px;margin-top:14px;font-family:"novecento-sans",sans-serif;font-weight:600;font-size:13.6rem;line-height:.98;letter-spacing:-.01em;white-space:nowrap}
.izst-yt-big em{position:relative;top:-.08em;font-style:normal;font-family:"Yu Gothic Medium","游ゴシック Medium",YuGothic,"游ゴシック体","ヒラギノ角ゴ Pro W3","メイリオ",sans-serif;font-size:3.4rem;line-height:1;font-weight:700;letter-spacing:.08em}
.izst-yt-sub{margin:8px 0 0 6px;font-family:"novecento-sans",sans-serif;font-weight:600;font-size:2rem;line-height:1.2;letter-spacing:.34em;color:var(--izst-red)}
.izst-yt-tx{max-width:520px;margin-top:26px;font-size:1.4rem;line-height:2;color:#ececec}
.izst-yt-tl{display:flex;max-width:520px;margin:28px 0 34px}
.izst-yt-tl li{position:relative;flex:1;border-top:2px solid rgba(255,255,255,.3);padding-top:10px;font-size:1.15rem;line-height:1.5;color:#cfcfcf}
.izst-yt-tl li::before{content:"";position:absolute;top:-6px;left:0;width:10px;height:10px;border-radius:50%;background:#fff}
.izst-yt-tl li:last-child{border-top-color:var(--izst-red)}
.izst-yt-tl li:last-child::before{background:var(--izst-red);box-shadow:0 0 0 5px rgba(230,0,51,.25)}
.izst-yt-tl b{display:block;font-family:"novecento-sans",sans-serif;font-weight:600;font-size:1.9rem;line-height:1.3;color:#fff;letter-spacing:.02em}
.izst-yt-shot{position:relative;transform:rotate(3deg);border:1px solid rgba(255,255,255,.2);box-shadow:0 30px 70px rgba(0,0,0,.6)}
.izst-yt-shot img{display:block;width:100%;height:auto}
.izst-yt-badge{position:absolute;left:-30px;top:-44px;z-index:3;display:flex;flex-direction:column;align-items:center;justify-content:center;width:118px;height:118px;border-radius:50%;background:var(--izst-red);transform:rotate(-12deg);box-shadow:0 10px 30px rgba(230,0,51,.45);font-size:1rem;line-height:1.1}
.izst-yt-badge span{display:block;font-family:"novecento-sans",sans-serif;font-weight:600;font-size:1rem;line-height:1.3;letter-spacing:.16em}
.izst-yt-badge b{display:block;font-size:3.2rem;line-height:1.1;font-weight:700}
@media screen and (max-width:1099px){
  .izst-yt-in{grid-template-columns:1fr;gap:60px;padding:64px 0 74px}
  .izst-yt-big{font-size:min(13.6rem,17vw)}
  .izst-yt-r{width:100%;max-width:560px;box-sizing:border-box;margin:0 auto;padding:0 20px}
}
@media screen and (max-width:767px){
  .izst-yt-big em{font-size:2.2rem}
  .izst-yt-sub{font-size:1.5rem}
  .izst-yt-badge{left:-14px;top:-40px;width:92px;height:92px}
  .izst-yt-badge b{font-size:2.4rem}
  .izst-yt-badge span{font-size:.8rem}
}

/* ---------- 共通：追加セクション ---------- */
.izst-sec{width:92%;max-width:1160px;margin:0 auto;padding-top:110px}
.top_page .service .izst-sec .text_center{padding-bottom:54px}
.izst-sub{margin-top:16px;font-size:1.3rem;line-height:1.4;color:#b8b8b8;letter-spacing:.12em}
.izst-role{display:inline-block;margin-bottom:8px;padding:0 9px;border:1px solid rgba(255,255,255,.75);font-size:1.05rem;line-height:1.9;font-weight:700;letter-spacing:.12em}

/* ---------- WORKS ---------- */
.izst-wk{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.izst-wc{position:relative;display:block;grid-column:span 4;grid-row:span 2;min-height:560px;overflow:hidden;background:#111}
.izst-wc img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:transform .8s}
.izst-wc:hover img{transform:scale(1.03)}
.izst-wc::after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,rgba(0,0,0,0) 35%,rgba(0,0,0,.88) 100%)}
.izst-wc-c{position:absolute;left:0;right:0;bottom:0;z-index:2;display:block;padding:28px 30px 26px;font-size:1.3rem;line-height:1.7}
.izst-wc-c .izst-role{background:rgba(0,0,0,.35)}
.izst-wc-c strong{display:block;font-size:2.3rem;line-height:1.55;letter-spacing:.03em}
.izst-wd{display:flex;flex-direction:column;grid-column:span 2;background:rgba(0,0,0,.45);border:1px solid var(--izst-line2);transition:border-color .4s}
.izst-wd:hover{border-color:rgba(255,255,255,.5)}
.izst-wd-ph{display:block;overflow:hidden;background:#111;font-size:0;line-height:0}
.izst-wd-ph img{display:block;width:100%;height:auto}
.izst-wd-c{display:block;padding:14px 18px 16px;font-size:1.15rem;line-height:1.7}
.izst-wd-c strong{display:block;font-size:1.5rem;line-height:1.6;letter-spacing:.03em}
.izst-wd-d{display:block;margin-top:4px;font-size:1.15rem;line-height:1.7;color:#d6d6d6}
.izst-wc-c .izst-wd-d{max-width:560px;font-size:1.3rem;color:#dcdcdc}
.izst-media{display:flex;flex-wrap:wrap;justify-content:center;margin-top:46px;border-top:1px solid var(--izst-line2);border-bottom:1px solid var(--izst-line2)}
.izst-media li{border-left:1px solid var(--izst-line2);font-size:1.2rem;line-height:1.6;text-align:center}
.izst-media li:first-child{border-left:none}
.izst-media a{display:block;padding:18px 26px;font-size:1.2rem;line-height:1.6;color:#cfcfcf;transition:background .4s}
.izst-media a:hover{background:rgba(255,255,255,.07)}
.izst-media b{display:block;font-size:1.35rem;line-height:1.6;color:#fff;letter-spacing:.04em}
.izst-media .izst-media-lab{display:flex;align-items:center;padding:18px 26px;font-family:"novecento-sans",sans-serif;font-weight:600;font-size:1.4rem;line-height:1.4;letter-spacing:.2em}
.izst-sec > .izst-center{margin-top:44px}
@media screen and (max-width:900px){
  .izst-wk{grid-template-columns:repeat(2,1fr);gap:14px}
  .izst-wc{grid-column:span 2;grid-row:auto;min-height:340px}
  .izst-wd{grid-column:span 1}
  .izst-wc-c{padding:20px 18px 18px}
  .izst-wc-c strong{font-size:1.8rem}
}
@media screen and (max-width:520px){
  .izst-wk{grid-template-columns:1fr}
  .izst-wc,.izst-wd{grid-column:auto}
  .izst-media li{width:50%;border-left:none;border-top:1px solid var(--izst-line2)}
  .izst-media .izst-media-lab{width:100%;justify-content:center;border-top:none}
  .izst-media a{padding:14px 8px}
}

/* ---------- 決定版記事の帯 ---------- */
.izst-guide{position:relative;margin-top:110px;background:#111 url(../img/band_guide.webp) center/cover no-repeat}
.izst-guide::before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,rgba(8,8,8,.92) 0,rgba(8,8,8,.74) 46%,rgba(8,8,8,.15) 100%)}
.izst-guide-in{position:relative;width:92%;max-width:1000px;margin:auto;padding:74px 0}
.izst-guide-k{font-family:"novecento-sans",sans-serif;font-weight:600;font-size:1.3rem;line-height:1.4;letter-spacing:.2em;color:var(--izst-blue)}
.izst-guide-h{margin:6px 0 10px;font-size:3rem;line-height:1.5;font-weight:700;letter-spacing:.06em}
.izst-guide-t{max-width:470px;margin-bottom:26px;font-size:1.35rem;line-height:2;color:#e6e6e6}

/* ---------- FREE TOOLS ---------- */
.izst-tools{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.izst-tc{display:flex;flex-direction:column;border:1px solid var(--izst-line);background:rgba(0,0,0,.35);transition:border-color .4s}
.izst-tc:hover{border-color:#fff}
.izst-tc-ph{display:block;overflow:hidden;background:#222;font-size:0;line-height:0}
.izst-tc-ph img{display:block;width:100%;height:auto}
.izst-tc-t{display:block;padding:14px 16px 16px;font-size:1.2rem;line-height:1.7}
.izst-free{display:block;font-size:1.05rem;line-height:1.6;font-weight:700;letter-spacing:.14em;color:var(--izst-blue)}
.izst-tc-t strong{display:block;font-family:"novecento-sans","Yu Gothic Medium",sans-serif;font-size:1.45rem;line-height:1.5;font-weight:600;letter-spacing:.04em}
.izst-tc-d{display:block;font-size:1.2rem;line-height:1.7;color:#d6d6d6}
.izst-note{margin-top:30px;font-size:1.25rem;line-height:1.8;color:#cfcfcf}
.izst-note a{font-size:1.25rem;line-height:1.8;text-decoration:underline}
@media screen and (max-width:900px){.izst-tools{grid-template-columns:repeat(2,1fr);gap:14px}}

/* ---------- その他の取り組み ---------- */
.izst-others{width:92%;max-width:1000px;margin:100px auto 0;padding-bottom:150px;text-align:center}
.izst-others-h{margin-bottom:14px;font-size:1.2rem;line-height:1.6;color:#b8b8b8;letter-spacing:.1em}
.izst-others ul{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.izst-others li{font-size:1.2rem;line-height:1.6}
.izst-others a{display:block;padding:3px 14px;border:1px solid var(--izst-line2);font-size:1.2rem;line-height:1.9;color:#cfcfcf;transition:all .4s}
.izst-others a:hover{border-color:#fff;color:#fff}
@media screen and (max-width:767px){
  .izst-sec{padding-top:80px}
  .izst-others{margin-top:70px;padding-bottom:100px}
  .izst-guide{margin-top:80px}
}

/* 2段目の見出し（3Dasset.io／4DGS.jp）は片方が2行になるため、高さをそろえる */
@media screen and (min-width:768px){
  .izst-biz #service01 .service_column_2_list li:nth-child(n+3) .s_sub_ttl span{display:flex;align-items:center;min-height:4em}
}

/* 折り返し：文節の切れ目でだけ折り返す（日本語トップ。表に載っている文だけが <izst-ph> で包まれる）。
   枠より長い語は途中で折り返すので、はみ出さない */
izst-ph{display:inline;word-break:keep-all;overflow-wrap:break-word;overflow-wrap:anywhere;line-break:strict}
izst-nb{display:inline;white-space:nowrap}
/* 幅のごく狭い枠（小さいスマホの無料ツールの説明）では、これまでどおりの折り返しにする */
@media screen and (max-width:374px){.izst-tc-d izst-ph{word-break:normal;overflow-wrap:normal}}
/* 短い見出し文は、行の長さをそろえる。説明文は、最後の行に数文字だけ残るのを避ける（対応ブラウザのみ） */
.izst .center_txt,.izst-about .lihe_2.bold,.izst-biz p.txt,.izst-biz .service_column_2_list .txt p,.izst-wd strong,.izst-tc strong{text-wrap:balance}
.izst-biz .service_column_2_list .sub_txt p,.izst-about .lihe_2,.izst-yt-tx,.izst-wd-d,.izst-tc-d,.izst-sec > .izst-center{text-wrap:pretty}