:root{--tdb-navy:#282e36;--tdb-blue:#11438d;--tdb-gold:#eeb527;--tdb-ink:#2b3139;--tdb-muted:#687484;--tdb-line:#dce4ee;--tdb-soft:#f3f6fa}
*{box-sizing:border-box}html{scroll-behavior:smooth}.tdb-home{margin:0;background:#fff;color:var(--tdb-ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Yu Gothic",Meiryo,sans-serif}.tdb-home-wrap{width:min(1160px,calc(100% - 40px));margin:0 auto}.tdb-eyebrow{font-size:.76rem;font-weight:900;letter-spacing:.15em;color:#164b9a}.tdb-eyebrow.light{color:#f3cd6c}
.tdb-hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#edf2f9 0%,#f9fafc 55%,#fff9e8 100%);border-bottom:1px solid #e5ebf2}.tdb-hero:before{content:"";position:absolute;width:480px;height:480px;border:80px solid rgba(17,67,141,.055);border-radius:50%;right:-190px;top:-220px}.tdb-hero-grid{min-height:520px;padding:72px 0 66px;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(310px,.8fr);gap:58px;align-items:center}.tdb-hero-copy{position:relative;z-index:1}.tdb-hero h1{margin:12px 0 20px;font-size:clamp(2.7rem,7vw,5.5rem);line-height:1.02;letter-spacing:-.055em;color:#23282e}.tdb-hero h1 span{color:#124490}.tdb-hero-copy>p{max-width:690px;margin:0;color:#5c6776;font-size:clamp(1rem,2vw,1.18rem);line-height:1.9;font-weight:600}.tdb-hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.tdb-button{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:12px 19px;border-radius:14px;text-decoration:none;font-weight:900;transition:.18s ease}.tdb-button:hover{transform:translateY(-2px)}.tdb-button.primary{background:#185abf;color:#fff;box-shadow:0 10px 24px rgba(17,65,138,.18)}.tdb-button.secondary{background:#fff;color:#2e353e;border:1px solid #cbd6e5}.tdb-button.gold{background:#f1c34f;color:#24292f}.tdb-hero-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}.tdb-hero-tags span{padding:7px 11px;border-radius:999px;background:#fff;border:1px solid #d9e1ec;color:#626d7c;font-size:.8rem;font-weight:800}
.tdb-hero-panel{position:relative;min-height:330px;padding:36px;border-radius:32px;background:linear-gradient(145deg,#1b54a8 0%,#1f5ebc 100%);color:#fff;box-shadow:0 28px 70px rgba(38,43,50,.18);overflow:hidden}.tdb-hero-panel:after{content:"";position:absolute;inset:auto -90px -130px auto;width:310px;height:310px;border-radius:50%;border:56px solid rgba(255,255,255,.06)}.tdb-hero-panel .road-line{width:76px;height:130px;margin:4px 0 28px;position:relative;transform:skew(-8deg);border-left:22px solid #eeb527;border-right:22px solid #eeb527;border-radius:50% 50% 15% 15%}.tdb-hero-panel .road-line:after{content:"";position:absolute;left:50%;top:10px;height:102px;border-left:3px dashed rgba(255,255,255,.95)}.tdb-hero-panel strong{display:block;font-size:.82rem;letter-spacing:.12em;color:#f4d076}.tdb-hero-panel p{position:relative;z-index:1;font-size:1.2rem;font-weight:800;line-height:1.75}.hero-mini-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:24px}.hero-mini-grid span{text-align:center;padding:9px 3px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.07);border-radius:9px;font-size:.78rem;font-weight:800}
.tdb-section{padding:76px 0}.tdb-section-head{display:grid;grid-template-columns:1fr minmax(240px,390px);gap:36px;align-items:end;margin-bottom:28px}.tdb-section-head h2{margin:7px 0 0;font-size:clamp(2rem,4vw,3.2rem);line-height:1.34;letter-spacing:.01em;color:#282e36}.tdb-section-head>p{margin:0;color:#697586;line-height:1.8}.tdb-free{background:#fff}.tdb-training{background:#f3f6fa}.tdb-card-grid{display:grid;gap:18px}.tdb-card-grid.three{grid-template-columns:repeat(3,1fr)}.tdb-card-grid.two{grid-template-columns:repeat(2,1fr)}.tdb-content-card{position:relative;min-height:280px;padding:26px;border:1px solid #dbe3ed;border-radius:22px;background:#fff;text-decoration:none;color:#2c323b;box-shadow:0 12px 34px rgba(48,55,64,.055);transition:.18s ease}.tdb-content-card:hover{transform:translateY(-4px);box-shadow:0 18px 42px rgba(48,55,64,.10);border-color:#bfcddf}.tdb-content-card .card-icon{font-size:2rem}.tdb-content-card small,.tdb-training-card small{display:block;margin-top:18px;color:#7d8898;font-weight:900;letter-spacing:.11em}.tdb-content-card h3{font-size:1.35rem;line-height:1.5;margin:7px 0 10px;color:#282e36}.tdb-content-card p{line-height:1.75;color:#6b7889;margin:0 0 24px}.tdb-content-card b{position:absolute;bottom:25px;color:#11438d}.tdb-training-card{display:grid;grid-template-columns:58px 1fr;gap:18px;padding:26px;border-radius:22px;background:#fff;border:1px solid #dbe3ed;text-decoration:none;color:#2c323b;transition:.18s ease}.tdb-training-card:hover{transform:translateY(-3px);border-color:#b9c9dd;box-shadow:0 14px 34px rgba(48,55,64,.08)}.tdb-training-card>span{font-size:2rem}.tdb-training-card small{margin:0}.tdb-training-card h3{margin:6px 0 9px;font-size:1.35rem;line-height:1.48;color:#282e36}.tdb-training-card p{margin:0;color:#6a7687;line-height:1.75}.tdb-about-band{padding:68px 0;background:#1c56ac;color:#fff}.tdb-about-grid{display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center}.tdb-about-grid h2{font-size:clamp(2rem,4vw,3.2rem);margin:9px 0 15px;line-height:1.34;letter-spacing:.01em}.tdb-about-grid p{max-width:790px;margin:0;color:#dbe4f0;line-height:1.9}
@media(max-width:900px){.tdb-hero-grid{grid-template-columns:1fr;gap:32px;padding:54px 0}.tdb-hero-panel{min-height:0}.tdb-section-head{grid-template-columns:1fr;gap:12px}.tdb-card-grid.three{grid-template-columns:1fr}.tdb-card-grid.two{grid-template-columns:1fr}.tdb-about-grid{grid-template-columns:1fr;gap:26px}.tdb-about-grid .tdb-button{justify-self:start}}
@media(max-width:560px){.tdb-home-wrap{width:min(100% - 28px,1160px)}.tdb-hero-grid{padding:42px 0}.tdb-hero h1{font-size:clamp(2.55rem,14vw,4rem)}.tdb-hero-panel{padding:26px;border-radius:24px}.tdb-section{padding:54px 0}.tdb-content-card{min-height:255px;padding:22px}.tdb-training-card{padding:22px;grid-template-columns:44px 1fr}.hero-mini-grid{grid-template-columns:repeat(2,1fr)}}


/* TD BASE secret-training-base HERO. Desktop artwork carries the approved headline. */
.tdb-screen-reader-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.tdb-home .tdb-secret-base{background:#184b96;border-bottom:0;overflow:hidden}
.tdb-home .tdb-secret-base:before{display:none}
.tdb-secret-base-picture{display:block;max-width:1672px;margin:0 auto}
.tdb-secret-base-image{display:block;width:100%;height:auto;max-height:none;object-fit:contain}
.tdb-secret-base-mobile-copy{display:none}
@media(max-width:680px){
  .tdb-secret-base-picture{width:100%;height:clamp(250px,72vw,480px);overflow:hidden}
  .tdb-secret-base-image{width:100%;height:100%;object-fit:cover}
  .tdb-secret-base-mobile-copy{display:block;padding:20px 0 30px;color:#e6eef8}
  .tdb-secret-base-mobile-copy p{margin:0;color:#d3dfef;line-height:1.7;font-weight:600;font-size:.94rem}
  .tdb-secret-base-mobile-copy .tdb-secret-base-mobile-title{font-size:clamp(1.35rem,6vw,1.9rem);font-weight:900;color:#fff;line-height:1.4;margin-bottom:10px;letter-spacing:.02em}
  .tdb-secret-base-mobile-title strong{display:block;font-size:1.6em;line-height:1.2;color:#1a63d1}
}

/* ProdPrep 58: road illustration HERO (Canva). The headline is real text over the empty left side of the artwork. */
.tdb-home .tdb-road-hero{position:relative;background:#e9f1fc;border-bottom:1px solid #dbe5f1;overflow:hidden}
.tdb-home .tdb-road-hero:before{display:none}
.tdb-road-hero-picture{display:block;margin:0 auto}
.tdb-road-hero-image{display:block;width:100%;height:auto}
.tdb-road-hero-copy{position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);z-index:1}
.tdb-road-hero-copy>*{max-width:min(46%,580px)}
.tdb-road-hero-eyebrow{margin:0 0 10px;font-size:.82rem;font-weight:900;letter-spacing:.16em;color:#11418a}
.tdb-home .tdb-road-hero h1{margin:0 0 16px;font-size:clamp(1.5rem,2.9vw,3rem);line-height:1.25;letter-spacing:.01em;color:#242930}
.tdb-road-hero h1 span{white-space:nowrap;color:#242930}.tdb-road-hero h1 strong{display:block;color:#1a63d1;font-size:1.25em;line-height:1.2}.tdb-road-hero h1 strong em{font-style:normal;background:linear-gradient(transparent 68%,rgba(246,190,44,.6) 68%);padding:0 .06em}
.tdb-road-hero-lead{margin:0;color:#464e59;font-size:clamp(.95rem,1.35vw,1.1rem);line-height:1.85;font-weight:700}
.tdb-road-hero-actions{margin:22px 0 0}
@media(max-width:900px){.tdb-road-hero-copy>*{max-width:48%}.tdb-road-hero-lead{display:none}}
@media(max-width:680px){
  .tdb-road-hero-picture{max-width:520px}
  .tdb-road-hero-copy{position:static;transform:none;padding:20px 0 30px}
  .tdb-road-hero-copy>*{max-width:none}
  .tdb-road-hero-lead{display:block}
  .tdb-home .tdb-road-hero h1{font-size:clamp(1.45rem,6.4vw,2rem)}
  .tdb-road-hero h1 strong{font-size:1.45em}
}