:root{--navy:#0c203b;--teal:#0a7180;--teal-2:#68b6ba;--pale:#eef7f7;--line:#d7e2e5;--white:#fff;--shadow:0 18px 50px rgba(12,32,59,.12)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--navy);font-family:"Noto Sans JP",sans-serif;line-height:1.8;background:#fff}a{color:inherit;text-decoration:none}.container{width:min(1160px,calc(100% - 48px));margin:auto}.narrow{width:min(820px,calc(100% - 48px))}
.site-header{position:fixed;inset:0 0 auto;z-index:20;height:82px;background:rgba(255,255,255,.87);backdrop-filter:blur(18px);border-bottom:1px solid transparent;transition:.25s}.site-header.scrolled{height:70px;border-color:rgba(12,32,59,.08);box-shadow:0 8px 30px rgba(12,32,59,.06)}.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;font-size:1.55rem;font-weight:800;letter-spacing:-.03em}.brand-mark{width:27px;height:31px;position:relative;display:inline-block}.brand-mark i{position:absolute;width:18px;height:22px;border:4px solid var(--teal-2);border-radius:9px}.brand-mark i:first-child{left:0;top:0;border-right-color:transparent}.brand-mark i:last-child{right:0;bottom:0;border-left-color:transparent}.global-nav{display:flex;align-items:center;gap:25px;font-size:.83rem;font-weight:700}.global-nav>a:not(.button):hover{color:var(--teal)}.button{display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:54px;padding:0 30px;border:1px solid var(--teal);border-radius:999px;font-weight:700;transition:.22s;box-shadow:none}.button:hover{transform:translateY(-2px);box-shadow:0 10px 25px rgba(10,113,128,.18)}.button-primary{background:linear-gradient(135deg,#075b69,#0a7d89);color:#fff}.button-outline{background:rgba(255,255,255,.8);color:var(--teal)}.button-small{min-height:42px;border-radius:8px;padding:0 17px;font-size:.78rem}.menu-button{display:none;background:none;border:0;padding:10px}.menu-button span{display:block;width:25px;height:2px;background:var(--navy);margin:6px}
.hero{position:relative;min-height:720px;padding-top:82px;overflow:hidden;background:#f7fbfc}.hero-image{position:absolute;inset:82px 0 0;background:url("assets/linksign-hero.png") center/cover no-repeat}.hero-image:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(255,255,255,.99) 0%,rgba(255,255,255,.9) 31%,rgba(255,255,255,.16) 56%,rgba(255,255,255,0) 100%)}.hero-inner{position:relative;z-index:1;min-height:638px;display:flex;align-items:center}.hero-copy{width:55%;padding:60px 0}.eyebrow{font-size:1.2rem;font-weight:700;letter-spacing:.03em}.hero h1{font-size:clamp(2.9rem,4.5vw,4.7rem);line-height:1.34;letter-spacing:.02em;margin:14px 0 28px;font-weight:800}.hero h1 span{color:var(--teal-2)}.hero-lead{font-size:1rem;font-weight:500;margin-bottom:38px}.hero-actions{display:flex;gap:16px;flex-wrap:wrap}.hero-note{position:absolute;right:1%;top:75px;color:var(--teal);font-size:1.55rem;line-height:1.5;letter-spacing:.14em;transform:rotate(-6deg);font-weight:500}
.section{padding:78px 0}.section-soft{background:linear-gradient(180deg,#fbfdfd,#f4fafa)}.section-kicker{margin:0 0 12px;color:var(--teal);font-size:.8rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase}.section-kicker.center{text-align:center}.section-title{text-align:center;font-size:2rem;letter-spacing:.08em;margin:0 0 48px}.section-title:before,.section-title:after{content:"";display:inline-block;width:58px;height:1px;background:var(--line);vertical-align:middle;margin:0 24px}.concept-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:90px;align-items:center}.concept-copy h2,.plugin-copy h2{font-size:2.5rem;line-height:1.5;margin:0 0 24px}.concept-copy p:not(.section-kicker),.plugin-copy>p:not(.section-kicker){color:#40516a}.problem-list{background:var(--navy);padding:18px 42px;border-radius:26px;box-shadow:var(--shadow)}.problem-list div{display:grid;grid-template-columns:46px 1fr;align-items:center;gap:18px;padding:23px 0;border-bottom:1px solid rgba(255,255,255,.13);color:#fff}.problem-list div:last-child{border:0}.problem-list span{color:var(--teal-2);font-size:.8rem;font-weight:800}.problem-list p{margin:0;font-size:.93rem}.comparison{display:grid;grid-template-columns:1fr 64px 1fr;align-items:center}.comparison-column{padding:38px 44px;border-radius:22px;background:#fff;box-shadow:var(--shadow)}.comparison-column.before{opacity:.75}.comparison-column.after{border:2px solid var(--teal-2)}.comparison-label{display:inline-block;padding:5px 14px;border-radius:99px;background:#e9eef0;font-size:.78rem;font-weight:800}.after .comparison-label{background:var(--teal);color:#fff}.comparison ol{list-style:none;counter-reset:steps;margin:25px 0 0;padding:0}.comparison li{counter-increment:steps;position:relative;padding:14px 0 14px 42px;border-bottom:1px solid var(--line)}.comparison li:last-child{border:0}.comparison li:before{content:counter(steps);position:absolute;left:0;top:14px;width:25px;height:25px;border-radius:50%;display:grid;place-items:center;background:var(--pale);color:var(--teal);font-size:.7rem;font-weight:800}.comparison-arrow{text-align:center;font-size:2.5rem;color:var(--teal-2)}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0}.feature-card{display:flex;gap:22px;align-items:center;padding:10px 35px;border-right:1px solid var(--line)}.feature-card:last-child{border:0}.icon{flex:0 0 76px;width:76px;height:76px;border-radius:50%;display:grid;place-items:center;background:var(--pale);color:var(--teal);font-size:2rem}.feature-card h3{font-size:1rem;margin:0 0 8px}.feature-card p{font-size:.85rem;margin:0;color:#40516a}
.demo-section{background:var(--navy);color:#fff;overflow:hidden}.demo-heading{display:grid;grid-template-columns:1.15fr .85fr;gap:80px;align-items:end;margin-bottom:38px}.demo-heading h2{font-size:2.45rem;line-height:1.5;margin:0}.demo-heading>p{margin:0;color:#c7d5e2}.demo-video-wrap{position:relative;padding:10px;border:1px solid rgba(255,255,255,.17);border-radius:24px;background:rgba(255,255,255,.07);box-shadow:0 28px 70px rgba(0,0,0,.3)}.demo-video{display:block;width:100%;aspect-ratio:16/9;border-radius:16px;background:#06111f;object-fit:cover}.demo-steps{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin:32px 0 0;padding:0}.demo-steps li{position:relative;padding:0 18px;border-left:1px solid rgba(255,255,255,.16)}.demo-steps span{display:block;color:var(--teal-2);font-size:.72rem;font-weight:800}.demo-steps b{display:block;margin:4px 0 2px;font-size:.92rem}.demo-steps small{color:#aebfce}
.flow-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:42px}.flow-card{position:relative;text-align:center}.flow-card:not(:last-child):after{content:"›";position:absolute;right:-33px;top:48%;font-size:4rem;color:#a8d7da;font-weight:200}.step{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:50%;background:#fff;box-shadow:var(--shadow);font-size:1.35rem;font-weight:800;margin-right:8px}.flow-card h3{font-size:.95rem;min-height:52px}.device{margin:18px auto;width:188px;height:330px;background:#0a0c10;border-radius:22px;padding:9px;box-shadow:0 16px 28px rgba(12,32,59,.22);text-align:left}.device.tablet{width:230px;border-radius:13px}.device-screen{height:100%;background:#fff;border-radius:14px;padding:18px 16px;color:#111;font-size:.69rem;text-align:center}.tablet .device-screen{border-radius:7px}.mini-brand{color:var(--teal);font-weight:800;text-align:left}.fake-qr{width:104px;height:104px;margin:14px auto;background:conic-gradient(#111 25%,#fff 0 50%,#111 0 75%,#fff 0);background-size:14px 14px;border:9px solid #111;box-shadow:inset 0 0 0 5px white}.device-screen small{background:#f0f3f4;padding:5px 10px;border-radius:5px}.form{text-align:left}.form dl{margin-top:22px}.form dt{font-size:.58rem;color:#667}.form dd{margin:0 0 15px}.signature{height:90px;margin:18px 0;border:1px solid #ccd4d6;border-radius:4px;display:grid;place-items:center;font-family:cursive;font-size:1.4rem}.demo-send{width:100%;border:0;border-radius:99px;padding:9px;background:var(--teal);color:white;font-weight:700}.role{display:inline-block;margin-top:20px;padding:8px 20px;border-radius:99px;background:var(--teal-2);color:#fff;font-size:.8rem;font-weight:700}
.benefit-grid{display:grid;grid-template-columns:repeat(4,1fr)}.benefit{text-align:center;padding:10px 35px;border-right:1px solid var(--line)}.benefit:last-child{border:0}.benefit>span{font-size:3rem;color:var(--teal)}.benefit p{font-size:.86rem;min-height:56px}.benefit strong{display:block;color:var(--teal);font-size:1.5rem}.scenes{background:var(--pale);text-align:center}.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;text-align:left}.scene-card{position:relative;padding:32px;background:#fff;border:1px solid rgba(10,113,128,.1);border-radius:18px;box-shadow:0 10px 30px rgba(12,32,59,.05)}.scene-card>span,.strength-card>span{color:var(--teal-2);font-size:.75rem;font-weight:800}.scene-card h3{margin:8px 0;font-size:1.15rem}.scene-card p{margin:0;color:#40516a;font-size:.86rem}.scene-definition{margin:42px auto 0;font-size:1.05rem;line-height:2}.scene-definition b{color:var(--teal);padding:0 8px}.plugin-section{overflow:hidden}.plugin-grid{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.plugin-visual{padding:40px;background:linear-gradient(135deg,#e8f6f6,#d6edef);border-radius:30px}.kintone-panel{background:#fff;border-radius:14px;padding:28px;box-shadow:var(--shadow)}.panel-label{display:inline-block;padding:4px 10px;background:#3497d3;color:#fff;border-radius:5px;font-size:.7rem;font-weight:800;margin-bottom:10px}.kintone-panel>b{display:block;font-size:1.2rem;margin-bottom:20px}.record-row{display:grid;grid-template-columns:100px 1fr;padding:13px 0;border-top:1px solid var(--line);font-size:.8rem}.record-row>span{color:#718096}.status{color:var(--teal)}.mini-sign{font-family:cursive;font-size:1.1rem}.check-list{list-style:none;margin:26px 0 0;padding:0}.check-list li{position:relative;padding:9px 0 9px 32px;font-weight:600}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:800}.strength-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.strength-card{padding:30px;background:#fff;border-radius:18px;border-top:3px solid var(--teal-2)}.strength-card h3{font-size:1.05rem;margin:10px 0}.strength-card p{font-size:.85rem;color:#40516a;margin:0}.faq details{border-bottom:1px solid var(--line);padding:20px 0}.faq summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between}.faq summary:after{content:"＋";color:var(--teal)}.faq details[open] summary:after{content:"−"}.faq details p{color:#40516a;padding-right:50px}
.cta{padding:62px 0;color:#fff;background:linear-gradient(90deg,rgba(9,109,122,.94),rgba(7,71,87,.88)),url("assets/linksign-hero.png") center 56%/cover}.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px}.cta h2{font-size:2rem;line-height:1.5;margin:0 0 8px}.cta p{margin:0}.cta-actions{display:flex;gap:18px}.button-light{background:#fff;color:var(--teal);border-color:#fff;border-radius:8px}.button-ghost{color:#fff;border-color:#fff;border-radius:8px}.footer-inner{min-height:120px;display:flex;align-items:center;justify-content:space-between}.brand-light{font-size:1.2rem}.footer-inner p{font-size:.75rem;color:#718096}.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s,transform .7s}.reveal.visible{opacity:1;transform:none}
@media(max-width:980px){.global-nav{position:fixed;inset:70px 0 auto;background:#fff;padding:26px 24px;display:none;flex-direction:column;align-items:stretch;box-shadow:0 20px 40px rgba(12,32,59,.12)}.global-nav.open{display:flex}.menu-button{display:block}.hero{min-height:760px}.hero-image{background-position:63% center}.hero-image:after{background:linear-gradient(90deg,rgba(255,255,255,.98),rgba(255,255,255,.8) 55%,rgba(255,255,255,.15))}.hero-copy{width:70%}.hero-note{display:none}.demo-heading{grid-template-columns:1fr;gap:18px}.demo-steps{grid-template-columns:repeat(3,1fr);row-gap:24px}.concept-grid,.plugin-grid{grid-template-columns:1fr;gap:45px}.comparison{grid-template-columns:1fr}.comparison-arrow{transform:rotate(90deg);height:60px}.feature-grid,.flow-grid{grid-template-columns:1fr}.feature-card{border-right:0;border-bottom:1px solid var(--line);padding:25px}.flow-card{padding-bottom:35px}.flow-card:not(:last-child):after{content:"↓";right:50%;top:auto;bottom:-15px}.scene-grid{grid-template-columns:repeat(2,1fr)}.strength-grid,.benefit-grid{grid-template-columns:repeat(2,1fr);gap:18px}.benefit:nth-child(2){border:0}.cta-inner{align-items:flex-start;flex-direction:column}}
@media(max-width:640px){.container,.narrow{width:min(100% - 32px,1160px)}.site-header{height:66px}.hero{padding-top:66px;min-height:auto}.hero-image{position:relative;inset:auto;height:340px;background-position:65% center}.hero-image:after{background:linear-gradient(180deg,rgba(255,255,255,0) 55%,#fff 100%)}.hero-inner{min-height:auto;margin-top:-60px}.hero-copy{width:100%;padding:0 0 60px}.eyebrow{font-size:1rem}.hero h1{font-size:2.55rem}.hero-lead{font-size:.92rem}.desktop-only{display:none}.hero-actions{flex-direction:column}.button{width:100%}.section{padding:58px 0}.section-title{font-size:1.55rem}.section-title:before,.section-title:after{width:22px;margin:0 10px}.demo-heading h2{font-size:1.8rem}.demo-video-wrap{padding:5px;border-radius:14px}.demo-video{border-radius:10px}.demo-steps{grid-template-columns:1fr;margin-top:24px}.demo-steps li{padding:10px 0 10px 54px;border-left:0;border-top:1px solid rgba(255,255,255,.15)}.demo-steps span{position:absolute;left:8px;top:15px}.concept-copy h2,.plugin-copy h2{font-size:2rem}.problem-list{padding:12px 24px}.comparison-column{padding:28px 22px}.scene-grid,.strength-grid{grid-template-columns:1fr}.scene-definition br{display:none}.feature-card{align-items:flex-start}.icon{flex-basis:58px;width:58px;height:58px}.plugin-visual{padding:18px}.record-row{grid-template-columns:85px 1fr}.benefit-grid{grid-template-columns:1fr}.benefit{border-right:0;border-bottom:1px solid var(--line);padding:25px}.cta-actions{width:100%;flex-direction:column}.cta-inner{gap:30px}.footer-inner{flex-direction:column;justify-content:center;gap:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.button{transition:none}}
.hero h1{font-size:clamp(2.9rem,4.5vw,4.25rem)}.hero-line{display:block;white-space:nowrap;color:var(--navy)}.hero h1 .hero-accent{color:var(--teal-2)}
@media(max-width:640px){.hero h1{font-size:2.25rem}}