/* 共通 */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0;width:100%;background:#fff!important;}
body{background:#f3f7fd;color:#172b50;font-family:"Noto Sans JP","Yu Gothic","Hiragino Kaku Gothic ProN",sans-serif;line-height:1.8;word-break:normal;overflow-wrap:break-word}
img{display:block;max-width:100%;height:auto}
h2,h3,p,dl,dd{margin:0}
section{padding:80px 0}
.wrap{width:1000px;margin:0 auto}
.section-kicker{font-size:14px;font-weight:900;letter-spacing:.2em;text-align:center;color:#e51b23}
.section-title{font-size:40px;font-weight:900;line-height:1.4;text-align:center;color:#092d72;margin:8px 0 20px}
.section-intro{font-size:16px;line-height:2;text-align:center;color:#465d87;margin:0 auto 48px}

/* メインビジュアル */
.main-visual{padding:0;background:#f3f7fd}
.main-visual img{width:1000px;max-width:100%;height:auto;margin:0 auto}

/* 申込ボタン */
.start-cta-wrap{width:520px;margin:0 auto;padding:27px 0px 0px}
.start-cta-wrap a.start-cta{display:flex;align-items:center;justify-content:center;position:relative;width:100%;min-height:80px;padding:10px 40px 10px 16px;background:#ed1c24;border-radius:6px;box-shadow:0 4px 0 #a81018;font-size:27px;font-weight:900;line-height:1.4;text-align:center;white-space:nowrap}
.start-cta-wrap a.start-cta::after{content:"";position:absolute;right:34px;top:50%;margin-top:-12px;width:24px;height:24px;background:#fff;border-radius:50%}
.start-cta-wrap a.start-cta::before{content:"";position:absolute;right:43px;top:50%;margin-top:-4px;width:8px;height:8px;border-top:2.5px solid #ed1c24;border-right:2.5px solid #ed1c24;transform:rotate(45deg);z-index:1}
.start-cta-wrap a.start-cta:link,.start-cta-wrap a.start-cta:visited,.start-cta-wrap a.start-cta:hover,.start-cta-wrap a.start-cta:active{color:#fff;text-decoration:none}
.start-cta-wrap a.start-cta:hover{transform:translateY(2px);box-shadow:0 2px 0 #a81018}

/* なぜ、今スタートするのか？ */
.grades{background:#f3f7fd}
.grade-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grade-card{background:#fff;border:1px solid #dce5f2;border-radius:15px;overflow:hidden;box-shadow:0 8px 24px rgba(20,49,91,.05)}
.card-top{padding:24px 28px 20px;border-bottom:1px solid #dce5f2}
.grade-card:nth-child(1) .card-top{background:#edf4ff}
.grade-card:nth-child(2) .card-top{background:#edf8f0}
.grade-card:nth-child(3) .card-top{background:#fff3e9}
.grade-label{font-size:14px;font-weight:900;letter-spacing:.08em;color:#1a56c4}
.grade-card:nth-child(2) .grade-label{color:#16804a}
.grade-card:nth-child(3) .grade-label{color:#c95815}
.grade-card h3{font-size:22px;font-weight:900;line-height:1.45;margin-top:8px;color:#122b55}
.card-body{padding:24px 28px 30px;font-size:15px;line-height:1.9;color:#46536a}

/* 講座の特徴 */
.promise{position:relative;overflow:hidden;background:#0e3075;color:#fff}
.promise::after{content:"";position:absolute;right:-100px;top:-160px;width:420px;height:420px;border:70px solid rgba(255,255,255,.06);border-radius:50%;pointer-events:none}
.promise .wrap{position:relative;z-index:1}
.promise .section-title,.promise .section-intro{color:#fff}
.promise-points{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.promise-point{padding:32px 28px;background:#1a3d80;border:1px solid rgba(255,255,255,.25);border-radius:12px}
.promise-point h3{font-size:20px;font-weight:800;line-height:1.5;color:#fff;margin-bottom:12px}
.promise-point p{font-size:15px;line-height:1.9;color:#fff}

/* 講座概要 */
section.overview{background:#f3f7fd}
.overview .overview-box{width:850px;margin:0 auto;background:#fff;border:1px solid #dce5f2;border-radius:15px;overflow:hidden;box-shadow:0 8px 24px rgba(9,45,114,.05)}
.overview .overview-head{margin:0;padding:24px 40px;background:#092d72;color:#fff;font-size:26px;font-weight:900;line-height:1.5}
.overview dl.overview-list{margin:0;padding:12px 40px 28px}
.overview dl.overview-list .overview-row{display:grid;grid-template-columns:180px 1fr;gap:16px;margin:0;padding:22px 0;border-bottom:1px solid #e2e8f2}
.overview dl.overview-list .overview-row:last-child{border-bottom:none}
.overview dl.overview-list .overview-row dt{margin:0;font-size:16px;font-weight:800;color:#092d72}
.overview dl.overview-list .overview-row dd{margin:0;font-size:17px;color:#172b50}
.overview dl.overview-list .overview-row dd.free-text{font-size:26px;font-weight:900;color:#e51b23}
.overview .grade-detail{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.overview .detail-pill{padding:16px 20px;background:#f0f4fa;border-radius:8px}
.overview .detail-pill strong{display:block;margin-bottom:3px;font-size:18px;font-weight:900;color:#092d72}
.overview .detail-pill span{display:block;font-size:15px;line-height:1.6;color:#172b50}

/* 早期入塾特典 */
.overview .benefit{width:850px;margin:40px auto 0;padding:32px 24px;background:#fffdf5;border:2px solid #f0c74c;border-radius:12px;text-align:center}
.overview .benefit .benefit-label{display:inline-block;padding:8px 24px;background:#f4c94f;color:#5b4200;font-size:26px;font-weight:900;line-height:1.4;border-radius:4px}
.overview .benefit h3{margin:20px 0 8px;font-size:24px;font-weight:800;color:#092d72}
.overview .benefit p{margin:0;font-size:24px;font-weight:500;color:#092d72}
.overview .benefit p strong{font-size:34px;font-weight:900;color:#e51b23}

/* 最下部CTA */
section.last-cta{padding:80px 0;background:linear-gradient(110deg,#0b2d70,#174da0);text-align:center}
.last-cta h2{margin:0 0 14px;font-size:44px;font-weight:700;line-height:1.4;color:#fff}
.last-cta p{margin:0;font-size:21px;color:#e1ebff}

/* 全員対象ボックス */
.overview .campaign{width:850px;margin:40px auto 0;padding:36px 40px;background:#e6f2ff;border:2px solid #9cc9f5;border-radius:12px;text-align:center}
.overview .campaign-head{font-size:26px;font-weight:900;line-height:1.4;color:#0a5aa8}
.overview .campaign-head small{display:inline-block;margin-left:16px;font-size:20px;font-weight:500;color:#092d72}
.overview .campaign-body{margin-top:20px;padding:26px 20px;background:#fff;border-radius:10px;font-size:18px;line-height:1.9;color:#172b50}
.overview .campaign-body strong{background:linear-gradient(transparent 60%,#fff176 60%);font-weight:900;color:#0a5aa8}

/* 学年カード＋時間一覧 */
.overview .sch-list{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;padding:0 20px 28px}
.overview .sch-card{min-width:0;padding:20px 16px;border:2px solid #092d72;border-radius:8px;background:#fff}
.overview .sch-title{margin:0 0 6px;font-size:24px;font-weight:900;line-height:1.4;color:#0a5aa8}
.overview .sch-desc{margin:0 0 14px;font-size:16px;color:#172b50}
.overview .sch-btn{display:block;padding:14px 10px;background:#0a5aa8;color:#fff;font-size:17px;font-weight:700;text-align:center;border-radius:4px;cursor:pointer;list-style:none}
.overview .sch-btn:hover{opacity:.85}
.overview .sch-btn::-webkit-details-marker{display:none}
.overview .sch-btn::after{content:" ▼"}
.overview .sch-details[open] .sch-btn::after{content:" ▲"}
.overview .sch-scroll{margin-top:14px;overflow-x:auto}
.overview .sch-table{width:100%;border-collapse:collapse;font-size:12px;line-height:1.5}
.overview .sch-table th,.overview .sch-table td{padding:6px 3px;border:1px solid #cfd8e6;text-align:center;vertical-align:middle;color:#172b50;background:#fff;white-space:nowrap}
.overview .sch-table th{background:#e3f0fb;color:#092d72;font-weight:700;white-space:normal}
.overview .sch-table td:last-child{white-space:normal;min-width:100px;text-align:left}
.overview .sch-table .sch-area{background:#f0f4fa;font-weight:700;color:#092d72}
.overview .sch-table .sch-name{font-weight:700;text-align:left;padding-left:8px;color:#092d72}
.overview .sch-details{min-width:0;max-width:100%}
.overview .sch-scroll{max-width:100%}

/* バナー */
.start-banner{width:800px;max-width:100%;margin:40px auto 60px}
.start-banner img{width:100%;height:auto}