:root{--primary:#007aff;--primary-dark:#0056cc;--secondary:#5856d6;--accent:#34c759;--background:#fff;--background-secondary:#f8fafc;--background-tertiary:#f1f5f9;--text-primary:#0f172a;--text-secondary:#475569;--text-tertiary:#94a3b8;--border:#e2e8f0;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -2px rgba(0,0,0,.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.1);--shadow-xl:0 20px 25px -5px rgba(0,0,0,.1),0 8px 10px -6px rgba(0,0,0,.1);--radius:12px;--radius-lg:20px;--touch-target:44px;--mobile-padding:20px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-tap-highlight-color:transparent}body{font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Segoe UI,Roboto,sans-serif;line-height:1.6;color:var(--text-primary);background:var(--background);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}@keyframes slideInRight{0%{transform:translateX(100%)}to{transform:translateX(0)}}@keyframes slideOutRight{0%{transform:translateX(0)}to{transform:translateX(100%)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.animate-fade-in-up{animation:fadeInUp .6s ease-out forwards}.animate-float{animation:float 3s ease-in-out infinite}.animate-delay-100{animation-delay:.1s}.animate-delay-200{animation-delay:.2s}.animate-delay-300{animation-delay:.3s}.animate-delay-400{animation-delay:.4s}.glass{background:hsla(0,0%,100%,.8);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid hsla(0,0%,100%,.3)}.gradient-text{background:linear-gradient(135deg,var(--primary) 0,var(--secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;font-size:1rem;font-weight:600;text-decoration:none;border-radius:var(--radius);transition:all .2s ease;cursor:pointer;border:none;min-height:var(--touch-target);-webkit-tap-highlight-color:transparent}.btn:active{transform:scale(.98)}.btn-primary{background:linear-gradient(135deg,var(--primary) 0,var(--secondary) 100%);color:#fff;box-shadow:0 4px 14px 0 rgba(0,122,255,.4)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px 0 rgba(0,122,255,.5)}.btn-primary:active{transform:translateY(0) scale(.98)}.btn-secondary{background:var(--background);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--background-secondary);border-color:var(--primary)}.btn-dark{background:var(--text-primary);color:#fff}.btn-dark:hover{background:#1e293b;transform:translateY(-2px)}.btn-dark:active{transform:translateY(0) scale(.98)}.card{background:var(--background);border-radius:var(--radius-lg);padding:28px;transition:all .3s ease}.card-elevated{box-shadow:var(--shadow)}.card-elevated:hover{box-shadow:var(--shadow-xl);transform:translateY(-4px)}.card-bordered{border:1px solid var(--border)}.card-bordered:hover{border-color:var(--primary)}.section{padding:80px 24px}.section-alt{background:var(--background-secondary)}.container{max-width:1100px;margin:0 auto}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2}a{color:var(--primary);text-decoration:none;transition:color .2s ease}a:hover{color:var(--primary-dark)}.desktop-only{display:block}.mobile-only{display:none!important}.nav-links{display:flex;gap:24px;align-items:center}.mobile-menu-btn{display:none;width:44px;height:44px;border:none;background:transparent;cursor:pointer;padding:10px;border-radius:8px;transition:background .2s}.mobile-menu-btn:hover{background:var(--background-secondary)}.mobile-menu-btn svg{width:24px;height:24px;stroke:var(--text-primary)}.mobile-menu-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:200;animation:fadeIn .2s ease}.mobile-menu-drawer{position:fixed;top:0;right:0;bottom:0;width:280px;max-width:85vw;background:var(--background);z-index:201;padding:24px;animation:slideInRight .3s ease;overflow-y:auto}.mobile-menu-drawer.closing{animation:slideOutRight .3s ease forwards}.mobile-menu-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid var(--border)}.mobile-menu-close{width:44px;height:44px;border:none;background:var(--background-secondary);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.mobile-menu-close:hover{background:var(--background-tertiary)}.mobile-menu-links{display:flex;flex-direction:column;gap:8px}.mobile-menu-link{display:flex;align-items:center;gap:12px;padding:16px;color:var(--text-primary);text-decoration:none;font-size:1.1rem;font-weight:500;border-radius:12px;transition:background .2s;min-height:var(--touch-target)}.mobile-menu-link:hover{background:var(--background-secondary)}.mobile-menu-cta{margin-top:24px;padding-top:24px;border-top:1px solid var(--border)}.hero-buttons{gap:16px}.hero-buttons,.trust-badges{display:flex;justify-content:center;flex-wrap:wrap}.trust-badges{gap:32px}.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:32px;gap:32px}.features-main-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:32px;gap:32px;margin-bottom:32px;align-items:stretch}.features-small-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:16px;gap:16px}.feature-tags{display:flex;gap:12px;flex-wrap:wrap}.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:24px;gap:24px;align-items:stretch}.footer-links{display:flex;gap:32px;flex-wrap:wrap;justify-content:center}.legal-content-grid{display:grid;grid-template-columns:280px 1fr;grid-gap:48px;gap:48px}.legal-sidebar{position:-webkit-sticky;position:sticky;top:100px;align-self:start}.mobile-toc{display:none}.mobile-toc-btn{width:100%;padding:16px 20px;background:var(--background-secondary);border:1px solid var(--border);border-radius:12px;font-size:1rem;font-weight:600;color:var(--text-primary);cursor:pointer;display:flex;align-items:center;justify-content:space-between;min-height:var(--touch-target);transition:background .2s}.mobile-toc-btn:hover{background:var(--background-tertiary)}.mobile-toc-btn svg{transition:transform .3s}.mobile-toc-btn.open svg{transform:rotate(180deg)}.mobile-toc-content{display:none;margin-top:12px;padding:16px;background:var(--background-secondary);border-radius:12px}.mobile-toc-content.open{display:block}.mobile-toc-link{display:flex;align-items:center;gap:12px;padding:14px 12px;color:var(--text-secondary);text-decoration:none;font-size:.95rem;border-radius:8px;min-height:var(--touch-target);transition:background .2s,color .2s}.mobile-toc-link:hover{background:var(--background);color:var(--primary)}@media (max-width:1024px){.features-main-grid{gap:24px}.features-small-grid{grid-template-columns:repeat(2,1fr)}.pricing-grid{grid-template-columns:repeat(3,1fr);gap:16px}}@media (max-width:768px){:root{--mobile-padding:16px}.desktop-only{display:none!important}.mobile-only{display:block!important}.nav-links{display:none}.mobile-menu-btn{display:flex;align-items:center;justify-content:center}.mobile-menu-overlay.open{display:block}.hero-buttons{flex-direction:column;width:100%;max-width:320px;margin:0 auto}.hero-buttons .btn{width:100%;justify-content:center}.trust-badges{gap:20px}.steps-grid{gap:24px}.features-main-grid,.steps-grid{grid-template-columns:1fr}.features-small-grid{grid-template-columns:1fr 1fr;gap:12px}.feature-tags{gap:8px}.feature-tags span{font-size:.8rem!important;padding:6px 12px!important}.pricing-grid{grid-template-columns:1fr;gap:20px}.footer-links{flex-direction:column;gap:16px;align-items:center}.footer-links a{padding:8px 16px;min-height:var(--touch-target);display:flex;align-items:center}.legal-content-grid{grid-template-columns:1fr;gap:24px}.legal-sidebar{display:none}.mobile-toc{display:block;margin-bottom:24px}.section{padding:60px var(--mobile-padding)}.animate-float{animation:none}}@media (max-width:480px){.features-small-grid{grid-template-columns:1fr}.trust-badges{flex-direction:column;gap:12px}.section{padding:48px var(--mobile-padding)}}@supports (padding:max(0px)){body{padding-left:max(0px,env(safe-area-inset-left));padding-right:max(0px,env(safe-area-inset-right))}.mobile-menu-drawer{padding-right:max(24px,env(safe-area-inset-right))}}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}html{scroll-behavior:auto}}a:focus-visible,button:focus-visible{outline:2px solid var(--primary);outline-offset:2px}input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--primary);outline-offset:1px}.articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));grid-gap:20px;gap:20px}.article-card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-2px)}.article-content-grid{display:grid;grid-template-columns:280px 1fr;grid-gap:32px;gap:32px}.article-sidebar{position:-webkit-sticky;position:sticky;top:100px;align-self:start}.article-sidebar a:hover{background:var(--background-tertiary);color:var(--primary)}.article-body p{margin-bottom:1em}.article-body ol,.article-body ul{margin:1em 0;padding-left:1.5em}.article-body li{margin-bottom:.5em;line-height:1.8}.article-body strong{color:var(--text-primary);font-weight:600}.article-body em{color:var(--primary);font-style:normal;font-weight:500}.article-body blockquote{margin:1.5em 0;padding:16px 20px;background:var(--background-secondary);border-left:4px solid var(--primary);border-radius:0 12px 12px 0;font-style:italic;color:var(--text-secondary)}.article-body hr{border:none;height:1px;background:var(--border);margin:2em 0}.article-body .highlight-box{padding:20px 24px;background:linear-gradient(135deg,rgba(0,122,255,.08),rgba(88,86,214,.08));border-radius:14px;border:1px solid rgba(0,122,255,.15);margin:1.5em 0}.article-body .tip-box{padding:16px 20px;background:rgba(52,199,89,.1);border-radius:12px;border:1px solid rgba(52,199,89,.2);margin:1.5em 0}.article-body .tip-box:before{content:"💡 ヒント";display:block;font-weight:600;color:#34c759;margin-bottom:8px}.article-body .warning-box{padding:16px 20px;background:rgba(255,149,0,.1);border-radius:12px;border:1px solid rgba(255,149,0,.2);margin:1.5em 0}.article-body .warning-box:before{content:"⚠️ 注意";display:block;font-weight:600;color:#ff9500;margin-bottom:8px}.article-body .example-box{padding:16px 20px;background:var(--background-secondary);border-radius:12px;border:1px solid var(--border);margin:1.5em 0;font-family:inherit}.article-body .example-box:before{content:"📝 例文";display:block;font-weight:600;color:var(--text-secondary);margin-bottom:8px}.related-articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:20px;gap:20px}@media (max-width:1024px){.article-content-grid{grid-template-columns:240px 1fr;gap:24px}}@media (max-width:768px){.article-content-grid,.articles-grid{grid-template-columns:1fr}.article-content-grid{gap:0}.article-sidebar{display:none}.related-articles-grid{grid-template-columns:1fr}}