:root{--red:#e61b23;--red-deep:#c9141d;--ink:#171b21;--soft:#4e5865;--muted:#74808d;--line:#dce2e9;--bg:#f6f7f9;--panel:#fff;--cream:#fff9f1;--navy:#162235;--shadow:0 18px 50px rgba(23,27,33,.10);--radius:22px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:150px}body{margin:0;color:var(--ink);background:#fff;font-family:Inter,"Noto Sans JP","Yu Gothic UI","Yu Gothic",Meiryo,sans-serif;line-height:1.8;letter-spacing:.015em}a{color:inherit}img{max-width:100%;height:auto}.container{width:min(1160px,calc(100% - 40px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,226,233,.9)}.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;text-decoration:none}.brand img{width:min(360px,42vw);max-height:48px;object-fit:contain;object-position:left center}.header-actions{display:flex;align-items:center;gap:12px}.header-link{font-size:14px;font-weight:700;text-decoration:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55em;min-height:48px;padding:0 22px;border-radius:999px;text-decoration:none;font-weight:800;border:1px solid transparent;transition:.2s}.btn-primary{color:#fff;background:var(--red);box-shadow:0 10px 24px rgba(230,27,35,.22)}.btn-primary:hover{background:var(--red-deep);transform:translateY(-1px)}.btn-ghost{background:#fff;border-color:var(--line)}.hero{position:relative;overflow:hidden;padding:82px 0 72px;background:linear-gradient(135deg,#fff 0%,#fff8f2 55%,#f3f6f9 100%)}.hero:after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;right:-160px;top:-180px;background:rgba(230,27,35,.07)}.eyebrow{margin:0 0 15px;color:var(--red);font-size:14px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,.88fr) minmax(480px,1.12fr);align-items:center;gap:58px}.hero h1{margin:0;font-size:clamp(38px,5vw,68px);line-height:1.18;letter-spacing:-.045em}.hero-lead{margin:24px 0 0;font-size:clamp(17px,1.8vw,21px);color:var(--soft)}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.feature-pills{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px}.feature-pills span{padding:7px 12px;border:1px solid #e4d8cb;border-radius:999px;background:rgba(255,255,255,.78);font-size:13px;font-weight:700}.browser-shot{position:relative;background:#eef1f4;border:1px solid #d6dce3;border-radius:18px;box-shadow:var(--shadow);padding:34px 8px 8px}.browser-shot:before{content:"";position:absolute;top:13px;left:16px;width:10px;height:10px;border-radius:50%;background:#ff6b63;box-shadow:18px 0 #ffbd45,36px 0 #37c65b}.browser-shot img{display:block;width:100%;border-radius:10px}.section{padding:92px 0}.section-soft{background:var(--bg)}.section-dark{background:var(--navy);color:#fff}.section-head{max-width:900px;margin-bottom:42px}.section-kicker{margin:0 0 8px;color:var(--red);font-size:13px;font-weight:900;letter-spacing:.12em}.section h2{margin:0;font-size:clamp(30px,4vw,48px);line-height:1.3;letter-spacing:-.035em}.section-head p{margin:16px 0 0;color:var(--soft);font-size:17px}.section-dark .section-head p{color:#c8d0da}.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.quick-card{position:relative;padding:30px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:0 8px 28px rgba(23,27,33,.05)}.step-no{display:flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:50%;background:var(--red);color:#fff;font-weight:900}.quick-card h3{margin:18px 0 8px;font-size:21px}.quick-card p{margin:0;color:var(--soft)}.toc-wrap{position:sticky;top:76px;z-index:35;background:#fff;border-block:1px solid var(--line)}.toc{display:flex;gap:6px;overflow:auto;padding:11px 0;scrollbar-width:none}.toc::-webkit-scrollbar{display:none}.toc a{white-space:nowrap;text-decoration:none;padding:7px 13px;border-radius:999px;font-size:13px;font-weight:800;color:var(--soft)}.toc a:hover,.toc a.is-active{background:#ffecee;color:var(--red)}.manual-block{display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,.94fr);gap:52px;align-items:center;margin-top:58px}.manual-block.reverse{grid-template-columns:minmax(360px,.94fr) minmax(0,1fr)}.manual-block.reverse .manual-copy{order:2}.manual-block.reverse .shot-card{order:1}.manual-copy h3{margin:0 0 15px;font-size:clamp(25px,3vw,35px);line-height:1.35}.manual-copy p{margin:0 0 17px;color:var(--soft)}.check-list{list-style:none;margin:22px 0 0;padding:0}.check-list li{position:relative;padding:8px 0 8px 30px}.check-list li:before{content:"";position:absolute;left:0;top:16px;width:14px;height:8px;border-left:3px solid var(--red);border-bottom:3px solid var(--red);transform:rotate(-45deg)}.shot-card{margin:0;padding:10px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow)}.shot-card button{display:block;width:100%;padding:0;border:0;background:none;cursor:zoom-in}.shot-card img{display:block;width:100%;border-radius:12px}.shot-card figcaption{padding:12px 8px 3px;color:var(--muted);font-size:13px}.two-shots{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:38px}.notice{margin-top:28px;padding:20px 22px;border-left:5px solid var(--red);border-radius:0 14px 14px 0;background:var(--cream)}.notice strong{display:block;margin-bottom:5px}.control-table{width:100%;border-collapse:separate;border-spacing:0;overflow:hidden;margin-top:30px;border:1px solid var(--line);border-radius:16px;background:#fff}.control-table th,.control-table td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}.control-table tr:last-child th,.control-table tr:last-child td{border-bottom:0}.control-table th{width:28%;background:#f8f9fb;font-size:14px}.use-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.use-card{padding:28px;border:1px solid rgba(255,255,255,.14);border-radius:18px;background:rgba(255,255,255,.06)}.use-card .num{color:#ff6670;font-weight:900}.use-card h3{margin:9px 0 8px}.use-card p{margin:0;color:#c8d0da}.faq-list{display:grid;gap:13px}.faq-list details{border:1px solid var(--line);border-radius:15px;background:#fff;padding:0 20px}.faq-list summary{cursor:pointer;list-style:none;padding:19px 34px 19px 0;font-weight:800;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"＋";position:absolute;right:0;color:var(--red);font-size:22px}.faq-list details[open] summary:after{content:"−"}.faq-list details p{margin:-3px 0 20px;color:var(--soft)}.cta{padding:74px 0;background:var(--red);color:#fff}.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}.cta h2{margin:0;font-size:clamp(28px,4vw,46px)}.cta p{margin:10px 0 0;color:#ffe1e3}.cta .btn{background:#fff;color:var(--red)}.site-footer{padding:38px 0;background:#101722;color:#c4ccd5}.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:24px}.footer-links{display:flex;flex-wrap:wrap;gap:18px}.footer-links a{font-size:13px}.copyright{font-size:12px}.lightbox{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(8,12,18,.9)}.lightbox.is-open{display:flex}.lightbox img{max-width:min(1400px,94vw);max-height:88vh;border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.45)}.lightbox-close{position:absolute;right:22px;top:17px;width:48px;height:48px;border:1px solid rgba(255,255,255,.5);border-radius:50%;background:rgba(0,0,0,.25);color:#fff;font-size:30px;cursor:pointer}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:900px){.header-link{display:none}.hero{padding-top:55px}.hero-grid,.manual-block,.manual-block.reverse{grid-template-columns:1fr}.hero-grid{gap:40px}.manual-block.reverse .manual-copy,.manual-block.reverse .shot-card{order:initial}.quick-grid,.use-grid{grid-template-columns:1fr}.two-shots{grid-template-columns:1fr}.manual-block{gap:28px}.cta-inner,.footer-inner{align-items:flex-start;flex-direction:column}.brand img{width:min(310px,55vw)}}
@media(max-width:600px){.container{width:min(100% - 24px,1160px)}.site-header .btn{min-height:42px;padding:0 14px;font-size:13px}.brand img{width:190px}.hero{padding:44px 0 52px}.hero h1{font-size:39px}.hero-actions{flex-direction:column}.hero-actions .btn{width:100%}.browser-shot{padding-top:29px}.section{padding:68px 0}.quick-card{padding:24px}.control-table,.control-table tbody,.control-table tr,.control-table th,.control-table td{display:block}.control-table th{width:auto;border-bottom:0;padding-bottom:5px}.control-table td{padding-top:4px}.control-table tr{border-bottom:1px solid var(--line)}.control-table tr:last-child{border-bottom:0}.shot-card{padding:7px}.cta .btn{width:100%}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}

/* v2: controlled title wrapping and refined responsive layout */
.hero-title-line{display:block;white-space:nowrap}
.header-clock-label-short{display:none}
.section h2,.manual-copy h3,.cta h2{text-wrap:balance}

@media (min-width:1025px){
  .hero-grid{grid-template-columns:minmax(500px,1fr) minmax(0,1fr);gap:44px}
  .hero h1{font-size:clamp(46px,4.05vw,58px);line-height:1.22}
}

@media (max-width:1024px){
  html{scroll-padding-top:142px}
  .container{width:min(100% - 48px,900px)}
  .hero{padding:60px 0 64px}
  .hero-grid,.manual-block,.manual-block.reverse{grid-template-columns:1fr}
  .hero-grid{gap:38px}
  .hero-grid>div:first-child{max-width:760px}
  .hero h1{font-size:clamp(44px,6.7vw,62px)}
  .browser-shot{width:min(100%,820px);margin-inline:auto}
  .manual-block.reverse .manual-copy,.manual-block.reverse .shot-card{order:initial}
  .manual-block{gap:28px;margin-top:44px}
  .quick-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
  .use-grid{grid-template-columns:1fr}
  .two-shots{grid-template-columns:1fr}
  .shot-card{width:100%}
  .cta-inner,.footer-inner{align-items:flex-start;flex-direction:column}
  .brand img{width:min(310px,46vw)}
}

@media (max-width:760px){
  .container{width:min(100% - 32px,680px)}
  .header-inner{min-height:70px;gap:12px}
  .brand img{width:min(230px,46vw)}
  .header-link{display:none}
  .toc-wrap{top:70px}
  .quick-grid{grid-template-columns:1fr}
  .hero{padding:48px 0 54px}
  .hero h1{font-size:clamp(38px,8.2vw,52px)}
  .hero-lead{font-size:17px;line-height:1.9}
  .section{padding:74px 0}
  .section-head{margin-bottom:32px}
  .section h2{font-size:clamp(28px,6.8vw,40px)}
  .section-head p{font-size:16px}
  .manual-copy h3{font-size:clamp(24px,5.6vw,32px)}
  .manual-block{margin-top:38px}
  .two-shots{margin-top:28px}
  .feature-pills{gap:7px}
  .feature-pills span{font-size:12px}
}

@media (max-width:480px){
  html{scroll-padding-top:132px}
  .container{width:calc(100% - 24px)}
  .header-inner{min-height:64px;gap:8px}
  .brand img{width:160px;max-width:46vw}
  .header-actions{gap:6px}
  .header-clock-label-full{display:none}
  .header-clock-label-short{display:inline}
  .site-header .btn{min-height:40px;padding:0 11px;font-size:12px}
  .toc-wrap{top:64px}
  .toc{padding:8px 0}
  .toc a{padding:6px 11px;font-size:12px}
  .hero{padding:38px 0 46px}
  .eyebrow{font-size:12px;margin-bottom:12px}
  .hero h1{font-size:clamp(31px,9.3vw,42px);line-height:1.28;letter-spacing:-.055em}
  .hero-lead{margin-top:18px;font-size:15px;line-height:1.9}
  .hero-actions{margin-top:24px;flex-direction:column}
  .hero-actions .btn{width:100%}
  .feature-pills{margin-top:18px}
  .feature-pills span{padding:6px 9px}
  .browser-shot{padding:27px 6px 6px;border-radius:14px}
  .browser-shot:before{top:10px;left:13px;width:8px;height:8px;box-shadow:15px 0 #ffbd45,30px 0 #37c65b}
  .section{padding:58px 0}
  .section-head{margin-bottom:26px}
  .section h2{font-size:clamp(26px,7.7vw,34px);line-height:1.4}
  .section-head p{margin-top:12px;font-size:15px;line-height:1.85}
  .quick-card,.use-card{padding:22px}
  .quick-card h3{font-size:20px}
  .manual-block{margin-top:30px;gap:22px}
  .manual-copy h3{font-size:clamp(23px,6.5vw,29px);line-height:1.45}
  .manual-copy p,.check-list li{font-size:15px}
  .notice{margin-top:22px;padding:17px 16px}
  .shot-card{padding:6px;border-radius:15px}
  .shot-card img{border-radius:9px}
  .shot-card figcaption{font-size:12px;line-height:1.65;padding:10px 6px 2px}
  .control-table{margin-top:24px}
  .control-table,.control-table tbody,.control-table tr,.control-table th,.control-table td{display:block}
  .control-table th{width:auto;border-bottom:0;padding:13px 14px 4px}
  .control-table td{padding:3px 14px 14px;font-size:14px}
  .control-table tr{border-bottom:1px solid var(--line)}
  .control-table tr:last-child{border-bottom:0}
  .faq-list details{padding:0 16px}
  .faq-list summary{padding:17px 30px 17px 0;font-size:15px}
  .cta{padding:56px 0}
  .cta h2{font-size:30px;line-height:1.4}
  .cta .btn{width:100%}
  .footer-links{display:grid;gap:10px}
  .lightbox{padding:12px}
  .lightbox-close{right:12px;top:10px;width:42px;height:42px}
}

@media (max-width:340px){
  .brand img{width:145px}
  .site-header .btn{padding-inline:9px;font-size:11px}
  .hero h1{font-size:29px}
}

/* v6: reusable heading rows and controlled desktop line lengths */
.card-title-row{
  display:flex;
  align-items:center;
  gap:14px;
  min-width:0;
}
.quick-card .card-title-row h3{
  margin:0;
  font-size:22px;
  line-height:1.35;
  white-space:nowrap;
}
.quick-card>.card-title-row+p{
  margin-top:18px;
}
.check-list-primary{
  margin-top:0;
}
.section-head-wide{
  max-width:none;
}
.section-head-wide>p:last-child{
  max-width:none;
  text-wrap:pretty;
}
.use-card-title{
  gap:12px;
}
.use-card-title .num{
  flex:0 0 auto;
  font-size:20px;
  line-height:1;
  letter-spacing:.04em;
}
.use-card-title h3{
  margin:0;
  font-size:22px;
  line-height:1.35;
  white-space:nowrap;
}
.use-card>.use-card-title+p{
  margin-top:16px;
}

@media (min-width:1025px){
  .hero h1{
    font-size:clamp(54px,4.5vw,66px);
    line-height:1.18;
  }
}

@media (max-width:760px){
  .quick-card .card-title-row h3,
  .use-card-title h3{
    font-size:21px;
  }
}

@media (max-width:340px){
  .card-title-row{
    gap:10px;
  }
  .quick-card .card-title-row h3,
  .use-card-title h3{
    font-size:19px;
  }
  .use-card-title .num{
    font-size:18px;
  }
}

/* v7: exact sticky navigation alignment and collapsible CLOCK specifications */
main > .section{
  scroll-margin-top:var(--manual-sticky-offset,130px);
}

.spec-details{
  margin-top:30px;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:16px;
  background:#fff;
}
.spec-details summary{
  position:relative;
  display:flex;
  align-items:center;
  gap:14px;
  min-height:62px;
  padding:15px 54px 15px 20px;
  cursor:pointer;
  list-style:none;
  font-weight:800;
}
.spec-details summary::-webkit-details-marker{display:none}
.spec-details summary::after{
  content:"＋";
  position:absolute;
  right:20px;
  top:50%;
  color:var(--red);
  font-size:24px;
  line-height:1;
  transform:translateY(-50%);
}
.spec-details[open] summary::after{content:"−"}
.spec-details-title{
  flex:0 0 auto;
  font-size:17px;
}
.spec-details-hint{
  color:var(--muted);
  font-size:13px;
  font-weight:600;
}
.spec-details-body{
  border-top:1px solid var(--line);
}
.spec-details .control-table{
  margin-top:0;
  border:0;
  border-radius:0;
}

.phrase-heading .heading-phrase{
  display:inline-block;
}

@media (max-width:600px){
  .spec-details summary{
    align-items:flex-start;
    flex-direction:column;
    gap:2px;
    padding:14px 50px 14px 16px;
  }
  .spec-details-title{font-size:16px}
  .spec-details-hint{font-size:12px}
}

/* Network check manual */
.hero-title-line{display:block}
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:34px}
.metric-card{padding:24px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 8px 28px rgba(23,27,33,.05)}
.metric-card strong{display:block;color:var(--red);font-size:19px;margin-bottom:8px}
.metric-card p{margin:0;color:var(--soft)}
.rule-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:30px}
.rule-card{padding:25px;border:1px solid var(--line);border-radius:18px;background:#fff;text-align:center}
.rule-card span,.rule-card small{display:block;color:var(--muted)}
.rule-card strong{display:block;color:var(--red);font-size:34px;line-height:1.2;margin:7px 0}
.section-dark .rule-card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14)}
.section-dark .rule-card span,.section-dark .rule-card small{color:#c8d0da}
.section-dark .rule-card strong{color:#ff6972}
.wide-shot{margin-top:40px}
.shot-card.shot-compact{max-width:430px;margin-inline:auto}
.shot-card.shot-tall{max-width:430px;margin-inline:auto}
.limit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:32px}
.limit-card{padding:23px;border:1px solid rgba(255,255,255,.14);border-radius:18px;background:rgba(255,255,255,.06)}
.limit-card strong{display:block;color:#ff6972;margin-bottom:8px}
.limit-card p{margin:0;color:#c8d0da}
.inline-link{color:var(--red);font-weight:800;text-underline-offset:3px}
.hero-grid .browser-shot{align-self:center}
.device-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.62fr);gap:52px;align-items:start}
.device-notes{display:grid;gap:16px}
.device-note{padding:22px;border:1px solid var(--line);border-radius:17px;background:#fff}
.device-note strong{display:block;font-size:18px;margin-bottom:5px}
.device-note p{margin:0;color:var(--soft)}
.spec-details .control-table th{width:32%}
@media(max-width:1000px){.metric-grid,.rule-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.device-grid{grid-template-columns:1fr}.shot-card.shot-tall{max-width:390px}}
@media(max-width:700px){.metric-grid,.rule-grid,.limit-grid{grid-template-columns:1fr}.metric-card,.rule-card,.limit-card{padding:21px}.device-grid{gap:28px}}


/* ===== beta 1.01 manual adjustments ===== */
@media(min-width:1025px){
  .hero-grid{grid-template-columns:minmax(430px,.88fr) minmax(0,1.12fr);gap:64px}
  .hero-grid>div:first-child{min-width:0;max-width:560px}
  .hero h1{font-size:clamp(45px,3.75vw,56px);line-height:1.22}
  .hero-grid .browser-shot{width:100%;max-width:650px;justify-self:end}
}
.hero-title-line{white-space:normal}
.section-dark .notice{color:var(--ink);background:#fff4df}
.section-dark .notice strong{color:var(--ink)}
.device-shot button{max-height:720px;overflow:hidden;border-radius:12px}
.device-shot img{height:720px;object-fit:cover;object-position:top}
.cta-title-line,.cta-open-btn span{display:block}
.cta-open-btn{text-align:center;line-height:1.35;min-width:250px}
@media(max-width:1000px){
  .device-grid{grid-template-columns:1fr minmax(300px,390px);gap:34px}
  .device-shot{max-width:390px;justify-self:end}
  .device-shot button{max-height:680px}
  .device-shot img{height:680px}
}
@media(max-width:820px){
  .device-grid{grid-template-columns:1fr}
  .device-shot{justify-self:center}
}
@media(max-width:700px){
  .device-shot button{max-height:none}
  .device-shot img{height:auto;object-fit:contain}
  .cta-open-btn{min-width:0;width:100%}
}

/* ===== beta 1.01 final visual tuning ===== */
@media(min-width:1025px){
  .hero-grid{grid-template-columns:minmax(520px,1fr) minmax(0,580px);gap:40px}
  .hero-grid>div:first-child{max-width:540px}
  .hero h1{font-size:50px;line-height:1.24}
  .hero-grid .browser-shot{max-width:580px}
}
.cta-open-btn{display:inline-flex;flex-direction:column;align-items:center;justify-content:center}