:root{--primary: #e60012;--primary-dark: #cc0010;--primary-light: #ff1a2a;--secondary: #6366f1;--accent: #06b6d4;--success: #10b981;--warning: #f59e0b;--dark: #0f172a;--gray-900: #111827;--gray-800: #1f2937;--gray-700: #374151;--gray-600: #4b5563;--gray-500: #6b7280;--gray-400: #9ca3af;--gray-300: #d1d5db;--gray-200: #e5e7eb;--gray-100: #f3f4f6;--gray-50: #f9fafb;--white: #ffffff;--radius: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--shadow: 0 1px 3px 0 rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1);--shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / .25)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans JP,sans-serif;line-height:1.6;color:var(--gray-900);background:var(--white);overflow-x:hidden}header{position:fixed;top:0;left:0;right:0;z-index:1000;-webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%);background:#ffffffd9;border-bottom:1px solid rgba(0,0,0,.05);transition:all .3s cubic-bezier(.4,0,.2,1)}header.scrolled{background:#fffffff2;box-shadow:0 4px 30px #0000001a}nav{display:flex;justify-content:space-between;align-items:center;padding:1rem 0;min-height:72px;max-width:1280px;margin:0 auto;padding:1rem 1.5rem}.logo{font-size:2rem;font-weight:900;background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;text-decoration:none}.nav-menu{display:flex;list-style:none;gap:1rem;align-items:center}.nav-link{padding:.75rem 1rem;color:var(--gray-700);text-decoration:none;font-weight:500;border-radius:var(--radius);transition:all .3s ease}.nav-link:hover{color:var(--primary);background:#e600120d}.nav-link.active{color:var(--primary);background:#e600121a}.cta-nav{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:var(--white);padding:.75rem 2rem;border-radius:2rem;text-decoration:none;font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 15px #e600124d}.cta-nav:hover{transform:translateY(-2px);box-shadow:0 6px 20px #e6001266}.hero{padding:120px 0 80px;background:linear-gradient(135deg,#ffffffe6,#f8f8f8e6);position:relative;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 20% 50%,rgba(230,0,18,.1) 0%,transparent 40%),radial-gradient(circle at 80% 80%,rgba(99,102,241,.05) 0%,transparent 40%);animation:hero-gradient 20s ease-in-out infinite}@keyframes hero-gradient{0%,to{transform:translate(0) scale(1)}50%{transform:translate(-20px,-20px) scale(1.1)}}.container{max-width:1280px;margin:0 auto;padding:0 1.5rem;position:relative;z-index:1}.hero-content-case-stuides{text-align:center;max-width:900px;margin:0 auto}.hero-badge{display:inline-flex;align-items:center;gap:.5rem;background:linear-gradient(135deg,#e600121a,#ff1a2a1a);color:var(--primary);padding:.5rem 1.5rem;border-radius:2rem;font-size:.875rem;font-weight:600;margin-bottom:2rem;border:1px solid rgba(230,0,18,.2);animation:pulse-badge 2s infinite}@keyframes pulse-badge{0%{box-shadow:0 0 #e6001266}70%{box-shadow:0 0 0 10px #e6001200}to{box-shadow:0 0 #e6001200}}.hero h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:900;line-height:1.2;margin-bottom:1.5rem;background:linear-gradient(135deg,var(--gray-900),var(--gray-700));-webkit-background-clip:text;-webkit-text-fill-color:transparent;animation:fade-in-up .8s ease-out}@keyframes fade-in-up{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.hero h1 .accent{background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero-subtitle{font-size:1.25rem;color:var(--gray-600);margin-bottom:3rem;animation:fade-in-up .8s ease-out .2s both}.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;margin-bottom:4rem;animation:fade-in-up .8s ease-out .4s both}.stat-item{text-align:center;padding:1.5rem;background:#fffc;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:var(--radius-lg);border:1px solid var(--gray-200);transition:all .3s ease}.stat-item:hover{transform:translateY(-5px);box-shadow:0 10px 30px #0000001a;border-color:var(--primary)}.stat-number{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.5rem;display:block}.stat-label{color:var(--gray-600);font-size:.875rem}.filter-section{background:var(--white);padding:3rem 0;border-bottom:1px solid var(--gray-200);position:sticky;top:72px;z-index:900;box-shadow:0 4px 20px #0000000d}.filter-container{display:flex;justify-content:space-between;align-items:center;gap:2rem}.filter-tabs{display:flex;gap:1rem;flex:1}.filter-tab{padding:.75rem 1.5rem;background:var(--gray-100);border:2px solid transparent;border-radius:2rem;font-weight:600;color:var(--gray-700);cursor:pointer;transition:all .3s ease;white-space:nowrap}.filter-tab:hover{background:var(--white);border-color:var(--gray-300)}.filter-tab.active{background:var(--primary);color:var(--white);border-color:var(--primary)}.filter-search{display:flex;align-items:center;gap:1rem;background:var(--gray-50);padding:.75rem 1.5rem;border-radius:2rem;border:2px solid var(--gray-200);min-width:300px;transition:all .3s ease}.filter-search:focus-within{background:var(--white);border-color:var(--primary);box-shadow:0 0 0 3px #e600121a}.filter-search input{background:none;border:none;outline:none;flex:1;font-size:.95rem}.filter-search-icon{color:var(--gray-500)}.case-studies-section{padding:4rem 0 6rem;background:linear-gradient(to bottom,var(--gray-50),var(--white))}.featured-cases{margin-bottom:4rem}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.section-title{font-size:1.75rem;font-weight:800;color:var(--gray-900);display:flex;align-items:center;gap:.5rem}.section-title .icon{color:var(--primary)}.view-all-link{color:var(--primary);font-weight:600;text-decoration:none;display:flex;align-items:center;gap:.5rem;transition:gap .3s ease}.view-all-link:hover{gap:1rem}.case-card{background:var(--white);border-radius:var(--radius-xl);overflow:hidden;box-shadow:0 4px 20px #00000014;transition:all .3s cubic-bezier(.4,0,.2,1);cursor:pointer;position:relative;height:100%;display:flex;flex-direction:column}.case-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(135deg,var(--primary),var(--primary-light));transform:scaleX(0);transition:transform .3s ease}.case-card:hover:before{transform:scaleX(1)}.case-card:hover{transform:translateY(-8px);box-shadow:0 12px 40px #0000001f}.case-card-header{padding:1.5rem 1.5rem 0;display:flex;justify-content:space-between;align-items:flex-start;gap:1rem}.industry-label{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:var(--white);padding:.375rem 1rem;border-radius:1rem;font-size:.875rem;font-weight:600;display:inline-block}.freshness-badge{background:var(--success);color:var(--white);padding:.25rem .75rem;border-radius:.75rem;font-size:.75rem;font-weight:700;text-transform:uppercase;animation:pulse 2s ease-in-out infinite}.case-card-body{padding:1rem 1.5rem 1.5rem;flex:1;display:flex;flex-direction:column}.case-title{font-size:1.25rem;font-weight:700;color:var(--gray-900);margin-bottom:1rem;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.case-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin-bottom:1rem;padding:1rem;background:linear-gradient(135deg,#e6001208,#ff1a2a08);border-radius:var(--radius);border:1px solid rgba(230,0,18,.1)}.metric{text-align:center}.metric-value{font-size:1.75rem;font-weight:800;color:var(--primary);display:block;line-height:1;margin-bottom:.25rem}.metric-label{font-size:.75rem;color:var(--gray-600)}.case-challenge{color:var(--gray-700);font-size:.875rem;line-height:1.6;margin-bottom:1rem;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.case-challenge:before{content:"課題：";font-weight:700;color:var(--gray-900)}.case-card-footer{padding:0 1.5rem 1.5rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}.case-company{font-size:.875rem;color:var(--gray-600)}.case-cta{color:var(--primary);font-weight:600;font-size:.875rem;display:flex;align-items:center;gap:.5rem;transition:gap .3s ease}.case-card:hover .case-cta{gap:1rem}.case-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:2rem;margin-bottom:3rem}.featured-carousel{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;margin-bottom:3rem}.featured-carousel .case-card{background:linear-gradient(135deg,#e6001205,#ff1a2a05);border:2px solid rgba(230,0,18,.1)}.load-more{text-align:center;padding:3rem 0}.load-more-btn{background:var(--white);color:var(--primary);padding:1rem 3rem;border:2px solid var(--primary);border-radius:2rem;font-weight:600;cursor:pointer;transition:all .3s ease}.load-more-btn:hover{background:var(--primary);color:var(--white);transform:translateY(-2px);box-shadow:0 5px 20px #e600124d}.floating-cta{position:fixed;bottom:2rem;right:2rem;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:var(--white);padding:1rem 2rem;border-radius:2rem;box-shadow:0 10px 30px #e600124d;cursor:pointer;z-index:100;display:flex;align-items:center;gap:.75rem;transition:all .3s ease;opacity:0;transform:translateY(20px)}.floating-cta.show{opacity:1;transform:translateY(0)}.floating-cta:hover{transform:translateY(-5px);box-shadow:0 15px 40px #e6001266}.floating-cta-icon{font-size:1.25rem;animation:bounce 2s ease-in-out infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.cta-section{background:linear-gradient(135deg,var(--primary),var(--primary-dark));padding:4rem 0;text-align:center;color:var(--white);position:relative;overflow:hidden}.cta-section:before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 20% 50%,rgba(255,255,255,.1) 0%,transparent 40%),radial-gradient(circle at 80% 80%,rgba(255,255,255,.05) 0%,transparent 40%);animation:cta-gradient 15s ease-in-out infinite}@keyframes cta-gradient{0%,to{transform:translate(0)}50%{transform:translate(-20px,-20px)}}.cta-content{position:relative;z-index:1;max-width:800px;margin:0 auto}.cta-title{font-size:2.5rem;font-weight:900;margin-bottom:1rem}.cta-subtitle{font-size:1.25rem;margin-bottom:2rem;opacity:.9}.cta-buttons{display:flex;gap:1rem;justify-content:center;align-items:center}.cta-button{padding:1rem 2.5rem;border-radius:2rem;font-weight:600;text-decoration:none;transition:all .3s ease;display:inline-flex;align-items:center;gap:.5rem}.cta-button.primary{background:var(--white);color:var(--primary);box-shadow:0 4px 15px #0003}.cta-button.primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0000004d}.cta-button.secondary{background:transparent;color:var(--white);border:2px solid var(--white)}.cta-button.secondary:hover{background:var(--white);color:var(--primary)}@media (max-width: 1024px){.stats-bar{grid-template-columns:repeat(2,1fr)}.filter-container{flex-direction:column;gap:1rem}.filter-tabs{overflow-x:auto;width:100%;gap:.5rem}.filter-tab{padding:.5rem 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.5rem!important;font-size:.65rem!important;font-weight:500!important;flex-shrink:0!important;min-width:fit-content!important;line-height:1.2!important;white-space:nowrap!important}}@media (max-width: 375px){.filter-tab{padding:.3rem .55rem!important;font-size:.68rem!important;font-weight:500!important}.filter-tabs{gap:.15rem!important}}