/* SECURITY v1（security.html だけが読む）。左ナビは top-v1.css を共用し、背景だけ WORKS 一覧・SERVICE と同じにする */
.sec-inner{width:calc(100% - 48px);max-width:1320px;margin-inline:auto}
.sec-hero{position:relative;isolation:isolate;overflow:hidden;background:var(--deep);border-bottom:1px solid var(--line)}
/* 画像は横長（3:1）で左が暗い。人物が文字と重ならない大きさで右下へ置き、上端だけ背景へなじませる */
.sec-hero-img{position:absolute;z-index:-2;right:0;bottom:0;display:block;width:min(100%,max(850px,calc((100vw - 276px - 34.4vw) / .595)));height:auto;max-width:none;aspect-ratio:3/1;-webkit-mask-image:linear-gradient(180deg,transparent 0,#000 12%);mask-image:linear-gradient(180deg,transparent 0,#000 12%)}
.sec-hero:before{content:"";position:absolute;z-index:-1;inset:0;background:linear-gradient(90deg,var(--deep) 28%,rgba(5,14,28,.6) 38%,rgba(5,14,28,0) 50%)}
.sec-hero-inner{padding:48px 0 44px}
.sec-hero h1{display:flex;align-items:center;gap:20px;margin:16px 0 0;font-size:clamp(3rem,5.6vw,5rem);line-height:1;letter-spacing:.04em}
.sec-hero h1:before{content:"";width:56px;height:4px;background:var(--gold);flex:none}
.sec-sub{margin:10px 0 0 76px;font-size:1rem;font-weight:600;letter-spacing:.1em}
.sec-catch{margin:20px 0 0;font-size:clamp(1.65rem,2.8vw,2.6rem);font-weight:900;line-height:1.35;letter-spacing:.03em}
.sec-catch em,.sec-final em{color:var(--gold);font-style:normal}
.sec-lead{margin:14px 0 0;color:#E6EDF6;line-height:1.8;word-break:keep-all;overflow-wrap:anywhere}
.sec-section{margin-top:40px}
.sec-head{display:flex;align-items:center;gap:16px}
.sec-head:before{content:"";flex:none;width:44px;height:4px;background:var(--gold)}
.sec-head h2{margin:0;font-size:clamp(1.3rem,2vw,1.75rem);font-weight:800;line-height:1.3;letter-spacing:.03em}
.sec-head:after{content:"";order:1;flex:1;height:1px;background:rgba(151,190,225,.4)}
.sec-head span{order:2;color:var(--slate);font-size:.76rem;letter-spacing:.14em;white-space:nowrap}
.sec-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:20px 0 0;padding:0;list-style:none}
.sec-card{position:relative;isolation:isolate;overflow:hidden;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;align-content:start;gap:12px 16px;padding:20px 24px;border:1px solid rgba(151,190,225,.4);border-radius:8px;background:linear-gradient(135deg,#0D2747 0%,#071527 100%)}
.sec-card:before{content:"";position:absolute;z-index:-1;inset:-8px;background:url(hero-top-v2-960w.webp) 0 0/320% auto no-repeat;opacity:.45;filter:blur(3px);-webkit-mask-image:linear-gradient(90deg,transparent 30%,#000 100%);mask-image:linear-gradient(90deg,transparent 30%,#000 100%)}
/* 05 は開発品質を伝える中心のカードなので、枠を黄色にして少し強く見せる */
.sec-card-strong{border:2px solid var(--gold);box-shadow:0 0 18px rgba(255,209,42,.22)}
.sec-card-title{grid-column:1/-1;display:flex;align-items:baseline;gap:14px}
.sec-num{flex:none;padding-bottom:4px;border-bottom:3px solid var(--gold);color:var(--gold);font-size:1.5rem;font-weight:800;line-height:1.1;letter-spacing:.04em}
.sec-card h3{margin:0;font-size:clamp(1.15rem,1.75vw,1.5rem);font-weight:800;line-height:1.3;letter-spacing:.02em;word-break:keep-all;overflow-wrap:anywhere}
.sec-checks{display:grid;gap:5px;margin:0;padding:0;list-style:none}
.sec-checks li{position:relative;padding-left:22px;color:#E6EDF6;font-size:.92rem;line-height:1.5;line-break:strict;word-break:auto-phrase;overflow-wrap:anywhere}
.sec-checks li:before{content:"";position:absolute;left:3px;top:.3em;width:6px;height:11px;border-right:2px solid var(--gold);border-bottom:2px solid var(--gold);transform:rotate(45deg)}
.sec-card>svg{width:112px;height:112px;fill:none;stroke:var(--cyan);stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round;filter:drop-shadow(0 0 6px rgba(104,216,255,.65))}
.sec-card>svg .sec-badge{fill:#0A2240}
.sec-card>svg .sec-lock{fill:var(--cyan)}
.sec-card>svg text{fill:var(--cyan);stroke:none;font-size:19px;font-weight:800;font-family:inherit}
.sec-card-wide{grid-column:1/-1;grid-template-columns:minmax(150px,auto) minmax(0,1fr);gap:12px 36px}
.sec-card-wide:before{background:url(work-mikoshiya-os-560w.webp) right 40%/44% auto no-repeat;opacity:.7;filter:none;-webkit-mask-image:linear-gradient(90deg,transparent 56%,#000 80%);mask-image:linear-gradient(90deg,transparent 56%,#000 80%)}
.sec-card-wide .sec-card-title{grid-column:auto}
.sec-card-wide .sec-checks{grid-template-columns:repeat(2,max-content);justify-content:start;gap:5px 28px}
.sec-steps{--tip:16px;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));margin:20px 0 0;padding:0;list-style:none}
.sec-steps li{--shape:polygon(0 0,calc(100% - var(--tip)) 0,100% 50%,calc(100% - var(--tip)) 100%,0 100%,var(--tip) 50%);position:relative;isolation:isolate;display:flex;flex-direction:column;align-items:center;padding:16px 26px 18px 30px;background:rgba(104,190,240,.6);text-align:center;clip-path:var(--shape)}
.sec-steps li:before{content:"";position:absolute;z-index:-1;inset:1px;background:linear-gradient(160deg,#10325C 0%,#071527 100%);clip-path:var(--shape)}
.sec-steps li:after{content:"";position:absolute;top:50%;right:11px;width:8px;height:8px;border-top:2px solid #fff;border-right:2px solid #fff;transform:translateY(-50%) rotate(45deg)}
.sec-steps li+li{margin-left:-15px}
.sec-steps li:first-child{--shape:polygon(0 0,calc(100% - var(--tip)) 0,100% 50%,calc(100% - var(--tip)) 100%,0 100%);padding-left:16px}
.sec-steps li:last-child{--shape:polygon(0 0,100% 0,100% 100%,0 100%,var(--tip) 50%);padding-right:16px}
.sec-steps li:last-child:after{display:none}
.sec-steps svg{width:44px;height:44px;fill:none;stroke:var(--cyan);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.sec-step-no{margin-top:8px;color:var(--gold);font-size:.74rem;font-weight:700;letter-spacing:.08em;white-space:nowrap}
.sec-steps h3{margin:4px 0 0;font-size:1.1rem;font-weight:800;line-height:1.35;word-break:keep-all;overflow-wrap:anywhere}
.sec-steps p{margin:8px 0 0;color:#CBD7E6;font-size:.8rem;line-height:1.55;word-break:keep-all;overflow-wrap:anywhere}
.sec-keywords{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;margin-top:22px}
.sec-keywords h3{margin:0;font-size:1rem;font-weight:800;letter-spacing:.02em}
.sec-keywords ul{display:flex;flex-wrap:wrap;gap:8px 10px;margin:0;padding:0;list-style:none}
.sec-keywords li{padding:6px 16px;border:1px solid rgba(151,190,225,.6);border-radius:999px;background:rgba(13,39,71,.6);font-size:.88rem;font-weight:600;line-height:1.3;white-space:nowrap}
.sec-final{position:relative;isolation:isolate;overflow:hidden;display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:32px;margin-top:44px;padding:26px 32px 26px 68px;border:2px solid var(--gold);border-radius:8px;background:linear-gradient(135deg,#0D2747 0%,#071527 100%)}
.sec-final:before{content:"";position:absolute;z-index:-1;left:0;top:0;bottom:0;width:46px;background:var(--gold);clip-path:polygon(0 0,100% 0,45% 100%,0 100%)}
.sec-final h2{margin:0;font-size:clamp(1.3rem,2.3vw,2.05rem);font-weight:900;line-height:1.4;letter-spacing:.02em}
.sec-final h2 span{word-break:keep-all;overflow-wrap:anywhere}
.sec-final-text{padding-left:32px;border-left:1px solid rgba(151,190,225,.5)}
.sec-final-text p{margin:0;color:#fff;font-weight:600;line-height:1.7;word-break:keep-all;overflow-wrap:anywhere}
.sec-final-text .sec-final-note{margin-top:8px;color:#CBD7E6;font-size:.84rem;font-weight:500}
.sec-band{position:relative;height:210px;margin-top:40px;overflow:hidden}
.sec-band img{display:block;width:100%;height:100%;max-width:none;object-fit:cover;object-position:50% 5%}
.sec-band:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,var(--deep) 0%,rgba(5,14,28,.45) 55%,rgba(5,14,28,.7) 100%)}
@media(min-width:1720px){.sec-hero-img{top:0;bottom:auto;-webkit-mask-image:none;mask-image:none}}
@media(min-width:1024px){
 .security-v1 .tv1-side{background:linear-gradient(180deg,rgba(5,13,26,.94) 0%,rgba(5,13,26,.94) 55%,rgba(5,13,26,.86) 68%,rgba(5,13,26,.5) 78%,rgba(5,13,26,.45) 88%,rgba(5,13,26,.8) 100%),url(top-nav-bg.webp) center bottom/cover no-repeat #050D1A}
}
/* 左ナビを除いた幅が狭い間は、文字を読める大きさに保って詰める */
@media(min-width:1024px) and (max-width:1279px){
 .sec-card{padding:18px}
 .sec-card>svg{width:72px;height:72px}
 .sec-checks li{font-size:.86rem}
 .sec-card-wide{grid-template-columns:minmax(0,1fr)}
 .sec-card-wide .sec-card-title{grid-column:1/-1}
 .sec-steps li{padding:14px 22px 14px 24px}
 .sec-steps li:first-child{padding-left:12px}
 .sec-steps li:last-child{padding-right:12px}
 .sec-steps svg{width:36px;height:36px}
 .sec-steps h3{font-size:.98rem}
 .sec-steps p{font-size:.75rem}
 .sec-final{gap:20px;padding:22px 20px 22px 52px}
 .sec-final-text{padding-left:20px}
}
@media(max-width:1023px){
 .sec-inner{width:calc(100% - 44px)}
 .sec-hero-inner{padding:124px 0 40px}
 .sec-hero-img{width:min(100%,calc((100vw - 335px) / .595))}
 .sec-card{padding:18px}
 .sec-card>svg{width:56px;height:56px}
 .sec-card-wide{grid-template-columns:minmax(0,1fr)}
 .sec-card-wide .sec-card-title{grid-column:1/-1}
 .sec-steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
 .sec-steps li,.sec-steps li:first-child,.sec-steps li:last-child{padding:16px 12px 18px;border:1px solid rgba(104,190,240,.6);border-radius:8px;background:linear-gradient(160deg,#10325C 0%,#071527 100%);clip-path:none}
 .sec-steps li+li{margin-left:0}
 .sec-steps li:before,.sec-steps li:after{display:none}
 .sec-final{grid-template-columns:minmax(0,1fr);gap:16px;padding:24px 20px 24px 52px}
 .sec-final-text{padding:16px 0 0;border-left:0;border-top:1px solid rgba(151,190,225,.5)}
}
@media(max-width:650px){
 .sec-inner{width:calc(100% - 36px)}
 .sec-hero-inner{padding:calc(50px + 143vw / 3) 0 32px}
 /* スマホは人物とシールドを切らないよう、文字の上へ帯として置く（画像左の暗い部分だけ外へ出す） */
 .sec-hero-img{top:66px;bottom:auto;width:143%;-webkit-mask-image:linear-gradient(0deg,transparent 0,#000 16%);mask-image:linear-gradient(0deg,transparent 0,#000 16%)}
 .sec-hero:before{display:none}
 .sec-hero h1{gap:14px}
 .sec-hero h1:before{width:32px}
 .sec-sub{margin-left:46px}
 .sec-head{flex-wrap:wrap;gap:8px 12px}
 .sec-head:before{width:32px}
 .sec-head:after{display:none}
 .sec-head span{order:0;width:100%}
 .sec-cards{grid-template-columns:minmax(0,1fr)}
 .sec-card>svg{align-self:start}
 .sec-card-wide .sec-checks{grid-template-columns:minmax(0,1fr)}
 .sec-card-wide:before{background-size:70% auto;background-position:right top;opacity:.4;-webkit-mask-image:linear-gradient(90deg,transparent 40%,#000 90%);mask-image:linear-gradient(90deg,transparent 40%,#000 90%)}
 .sec-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
 .sec-keywords li{padding:5px 12px;font-size:.82rem}
 .sec-final{padding:22px 16px 22px 42px}
 .sec-final:before{width:34px}
 .sec-band{height:150px;margin-top:32px}
 .sec-band img{object-position:50% 60%}
}
@media(max-width:359px){
 .sec-hero h1{gap:10px;font-size:2.5rem}
 .sec-catch{font-size:1.4rem}
 .sec-sub{margin-left:42px;font-size:.9rem}
 .sec-steps{grid-template-columns:minmax(0,1fr)}
}