*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #FF8C00;--primary-light: #FFA833;--primary-dark: #E67A00;--gold: #FFD700;--gold-light: #FFE44D;--navy: #1A2744;--navy-light: #2D3F5E;--correct-green: #34C759;--wrong-red: #FF3B30;--hint-blue: #5AC8FA;--gacha-purple: #AF52DE;--white: #FFFFFF;--snow: #F5F5F7;--silver: #E5E5EA;--gray: #8E8E93;--dark-gray: #3A3A3C;--near-black: #1C1C1E;--gradient-brand: linear-gradient(135deg, #FF8C00 0%, #FFD700 100%);--gradient-premium: linear-gradient(135deg, #AF52DE 0%, #FF8C00 100%);--gradient-sky: linear-gradient(180deg, #5AC8FA 0%, #FFFFFF 100%);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--shadow-glow: 0 0 16px rgba(255, 140, 0, .3);--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--section-padding: 80px 0;--max-width: 1100px;--bg-light: var(--snow);--bg-white: var(--white);--text-dark: var(--near-black);--text-gray: var(--dark-gray);--text-light: var(--gray)}html{scroll-behavior:smooth;font-size:16px}body{font-family:Noto Sans JP,Hiragino Kaku Gothic ProN,Hiragino Sans,Yu Gothic,Meiryo,sans-serif;color:var(--text-dark);line-height:1.7;overflow-x:hidden;background:var(--white)}a{text-decoration:none;color:inherit}img{max-width:100%;height:auto}.container{max-width:var(--max-width);margin:0 auto;padding:0 var(--space-lg)}.highlight{color:var(--primary)}.header{position:fixed;top:0;left:0;right:0;z-index:100;background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:var(--shadow-sm);transition:all .3s ease}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:var(--max-width);margin:0 auto;padding:0 var(--space-lg)}.header-logo{display:flex;align-items:center;gap:10px;font-size:1.4rem;font-weight:900;color:var(--navy)}.header-logo .logo-icon{width:40px;height:40px;background:var(--gradient-brand);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;font-family:Poppins,Inter,sans-serif;font-weight:800}.header-nav{display:flex;align-items:center;gap:var(--space-lg)}.header-nav a{font-size:.9rem;font-weight:600;color:var(--dark-gray);transition:color .2s ease-out}.header-nav a:hover{color:var(--primary)}.header-cta{background:var(--gradient-brand);color:#fff!important;padding:var(--space-sm) 20px;border-radius:var(--radius-full);font-size:.85rem!important;transition:transform .2s,box-shadow .2s;box-shadow:var(--shadow-md)}.header-cta:hover{transform:translateY(-1px);box-shadow:0 4px 15px #ff8c0066}.hero{position:relative;background:var(--gradient-brand);padding:140px 0 80px;overflow:hidden;min-height:90vh;display:flex;align-items:center}.hero:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 80%,rgba(255,215,0,.2) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(255,140,0,.3) 0%,transparent 50%)}.hero:after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:80px;background:var(--snow);clip-path:polygon(0 60%,100% 0,100% 100%,0 100%)}.hero-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:40px;max-width:var(--max-width);margin:0 auto;padding:0 var(--space-lg)}.hero-content{flex:1;color:#fff}.hero-badge{display:inline-block;background:#fff3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.3);padding:6px var(--space-md);border-radius:20px;font-size:.85rem;font-weight:600;margin-bottom:20px}.hero-title{font-size:3.2rem;font-weight:900;line-height:1.3;margin-bottom:var(--space-sm)}.hero-title .highlight{color:var(--white);text-shadow:0 2px 8px rgba(0,0,0,.15)}.hero-subtitle{font-size:1.3rem;opacity:.95;margin-bottom:30px;font-weight:500}.hero-stats{display:flex;gap:32px;margin-bottom:32px}.hero-stat{text-align:center}.hero-stat-number{font-size:2rem;font-weight:900;font-family:Poppins,Inter,sans-serif;color:var(--white);text-shadow:0 2px 8px rgba(0,0,0,.1)}.hero-stat-label{font-size:.8rem;opacity:.85}.store-buttons{display:flex;gap:var(--space-md);flex-wrap:wrap}.store-btn{display:inline-flex;align-items:center;gap:10px;background:var(--navy);color:#fff;padding:var(--space-md) var(--space-lg);border-radius:var(--radius-md);font-weight:600;transition:transform .2s ease-out,box-shadow .2s ease-out;border:none}.store-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.store-btn .store-icon{font-size:1.5rem}.store-btn .store-text{display:flex;flex-direction:column;line-height:1.2}.store-btn .store-text small{font-size:.65rem;opacity:.7;font-weight:400}.store-btn .store-text span{font-size:1rem;font-family:Poppins,Inter,sans-serif}.hero-mockup{flex:0 0 320px;position:relative}.phone-mockup{width:280px;height:560px;background:var(--navy);border-radius:40px;border:4px solid #333;padding:12px;box-shadow:0 30px 60px #0000004d;position:relative;overflow:hidden}.phone-mockup:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:120px;height:28px;background:var(--navy);border-radius:0 0 var(--radius-lg) var(--radius-lg);z-index:2}.phone-screen{width:100%;height:100%;background:linear-gradient(180deg,#ff8c00,#e67a00 30%,#1a2744);border-radius:28px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px 20px;gap:var(--space-md);overflow:hidden}.phone-screen .mock-quiz{width:100%;background:#ffffff1f;border-radius:var(--radius-lg);padding:var(--space-md);text-align:center;color:#fff}.phone-screen .mock-quiz .mock-question{font-size:.75rem;opacity:.7;margin-bottom:var(--space-xs)}.phone-screen .mock-quiz .mock-q-text{font-size:.9rem;font-weight:700;margin-bottom:var(--space-md);line-height:1.4}.mock-answers{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-sm)}.mock-answer{background:#ffffff26;border:2px solid rgba(255,255,255,.2);border-radius:10px;padding:var(--space-sm);font-size:1.1rem;font-weight:700;color:#fff;text-align:center}.mock-answer.correct{background:#34c7594d;border-color:var(--correct-green);color:var(--correct-green)}.phone-screen .mock-vs{display:flex;align-items:center;justify-content:space-between;width:100%;color:#fff;padding:0 var(--space-sm)}.mock-player{text-align:center}.mock-player-avatar{width:48px;height:48px;border-radius:50%;background:var(--gradient-brand);display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin:0 auto var(--space-xs)}.mock-player-name{font-size:.65rem;opacity:.8}.mock-player-score{font-size:1.1rem;font-weight:900;font-family:Poppins,Inter,sans-serif;color:var(--gold)}.mock-vs-text{font-size:1.2rem;font-weight:900;font-family:Poppins,Inter,sans-serif;color:var(--gold)}.mock-buzzer{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,#ff3b30,#dc2626);display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:900;color:#fff;box-shadow:0 6px 20px #ff3b3080;border:3px solid rgba(255,255,255,.3)}.float-coin{position:absolute;width:50px;height:50px;border-radius:50%;background:var(--gradient-brand);display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:900;font-family:Poppins,Inter,sans-serif;color:#92400e;box-shadow:0 4px 15px #ffd70066;animation:float 3s ease-in-out infinite}.float-coin:nth-child(1){top:20%;right:-20px;animation-delay:0s}.float-coin:nth-child(2){bottom:15%;right:40px;animation-delay:1s;width:40px;height:40px;font-size:1.2rem}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-15px)}}.section{padding:var(--section-padding)}.section-bg{background:var(--snow)}.section-title{text-align:center;font-size:2rem;font-weight:900;margin-bottom:var(--space-md);color:var(--near-black)}.section-title .highlight{color:var(--primary)}.section-desc{text-align:center;font-size:1.1rem;color:var(--dark-gray);margin-bottom:50px;max-width:600px;margin-left:auto;margin-right:auto}.about-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}.about-card{text-align:center;padding:40px var(--space-lg);background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:transform .3s,box-shadow .3s}.about-card:hover{transform:translateY(-5px);box-shadow:0 12px 40px #ff8c001f}.about-icon{width:80px;height:80px;border-radius:50%;margin:0 auto 20px;display:flex;align-items:center;justify-content:center;font-size:2.2rem}.about-icon.quiz{background:linear-gradient(135deg,#fff3e0,#ffe0b2)}.about-icon.coin{background:linear-gradient(135deg,#fff8e1,#ffe082)}.about-icon.exchange{background:linear-gradient(135deg,#e8f5e9,#a5d6a7)}.about-card h3{font-size:1.2rem;font-weight:800;margin-bottom:10px;color:var(--near-black)}.about-card p{font-size:.9rem;color:var(--dark-gray);line-height:1.7}.steps{display:flex;flex-direction:column;gap:0;max-width:700px;margin:0 auto;position:relative}.steps:before{content:"";position:absolute;left:30px;top:30px;bottom:30px;width:3px;background:var(--gradient-brand);border-radius:2px}.step{display:flex;gap:var(--space-lg);align-items:flex-start;padding:var(--space-lg) 0;position:relative}.step-number{flex-shrink:0;width:60px;height:60px;border-radius:50%;background:var(--gradient-brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:900;font-family:Poppins,Inter,sans-serif;z-index:1;box-shadow:0 4px 15px #ff8c004d}.step-content h3{font-size:1.2rem;font-weight:800;margin-bottom:6px;color:var(--near-black)}.step-content p{font-size:.95rem;color:var(--dark-gray)}.modes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-lg)}.mode-card{background:#fff;border-radius:var(--radius-lg);padding:var(--space-xl) var(--space-lg);box-shadow:var(--shadow-sm);border-top:4px solid transparent;transition:transform .2s ease-out,box-shadow .2s ease-out}.mode-card:hover{transform:translateY(-5px);box-shadow:0 12px 40px #ff8c001f}.mode-card.rate{border-top-color:var(--wrong-red)}.mode-card.casual{border-top-color:var(--hint-blue)}.mode-card.friend{border-top-color:var(--correct-green)}.mode-icon{font-size:2.5rem;margin-bottom:var(--space-md)}.mode-card h3{font-size:1.2rem;font-weight:800;margin-bottom:var(--space-sm);color:var(--near-black)}.mode-card .mode-tag{display:inline-block;padding:3px 10px;border-radius:var(--radius-md);font-size:.7rem;font-weight:700;margin-bottom:var(--space-md)}.mode-card.rate .mode-tag{background:#fff5f5;color:var(--wrong-red)}.mode-card.casual .mode-tag{background:#f0f9ff;color:var(--hint-blue)}.mode-card.friend .mode-tag{background:#f0fdf4;color:var(--correct-green)}.mode-card p{font-size:.9rem;color:var(--dark-gray);line-height:1.7}.mode-features{list-style:none;margin-top:var(--space-md)}.mode-features li{font-size:.85rem;color:var(--dark-gray);padding:var(--space-xs) 0;padding-left:20px;position:relative}.mode-features li:before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:700}.exchange-section{background:var(--gradient-brand);color:#fff;position:relative;overflow:hidden}.exchange-section:before{content:"";position:absolute;top:-2px;left:0;right:0;height:80px;background:var(--white);clip-path:polygon(0 0,100% 0,100% 40%,0 100%)}.exchange-section:after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:80px;background:var(--snow);clip-path:polygon(0 60%,100% 0,100% 100%,0 100%)}.exchange-content{position:relative;z-index:1}.exchange-section .section-title{color:#fff}.exchange-section .section-desc{color:#ffffffd9}.exchange-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:40px}.exchange-card{background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-lg);padding:var(--space-lg);text-align:center;transition:transform .2s ease-out,background .2s ease-out}.exchange-card:hover{transform:translateY(-4px);background:#ffffff40}.exchange-logo{width:64px;height:64px;border-radius:var(--radius-lg);background:#fff;margin:0 auto var(--space-md);display:flex;align-items:center;justify-content:center;font-size:1.8rem;font-weight:800}.exchange-card h4{font-size:.95rem;font-weight:700}.exchange-more{text-align:center;font-size:.9rem;opacity:.7;font-style:italic}.gacha-flex{display:flex;align-items:center;gap:48px}.gacha-visual{flex:0 0 360px}.gacha-machine{width:300px;height:380px;background:linear-gradient(180deg,#af52de,#9333ea 40%,#7c3aed);border-radius:30px 30px 20px 20px;margin:0 auto;position:relative;box-shadow:0 20px 50px #af52de4d;display:flex;flex-direction:column;align-items:center;padding-top:20px}.gacha-window{width:200px;height:200px;background:linear-gradient(180deg,#f3e8ff,#faf5ff);border-radius:50%;border:6px solid #6B21A8;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:var(--space-sm);padding:30px}.gacha-ball{width:36px;height:36px;border-radius:50%;box-shadow:inset -3px -3px 8px #0003}.gacha-ball:nth-child(1){background:var(--wrong-red)}.gacha-ball:nth-child(2){background:var(--hint-blue)}.gacha-ball:nth-child(3){background:var(--correct-green)}.gacha-ball:nth-child(4){background:var(--primary)}.gacha-ball:nth-child(5){background:var(--gacha-purple)}.gacha-ball:nth-child(6){background:#ec4899}.gacha-ball:nth-child(7){background:var(--gold)}.gacha-handle{width:50px;height:50px;background:#6b21a8;border-radius:50%;margin-top:20px;position:relative;box-shadow:0 4px 10px #0003}.gacha-handle:after{content:"";width:14px;height:30px;background:#581c87;position:absolute;bottom:-25px;left:50%;transform:translate(-50%);border-radius:0 0 6px 6px}.gacha-slot{width:80px;height:30px;background:#581c87;border-radius:0 0 10px 10px;margin-top:30px}.gacha-text{flex:1}.gacha-text h3{font-size:1.6rem;font-weight:900;margin-bottom:var(--space-md);color:var(--near-black)}.gacha-text h3 .highlight{color:var(--gacha-purple)}.gacha-text p{font-size:1rem;color:var(--dark-gray);line-height:1.8;margin-bottom:24px}.gacha-items{display:flex;gap:var(--space-md);flex-wrap:wrap}.gacha-item{display:flex;align-items:center;gap:var(--space-sm);background:var(--snow);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-full);font-size:.85rem;font-weight:600;color:var(--near-black)}.gacha-item-icon{font-size:1.2rem}.genre-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-md);margin-top:40px}.genre-tag{display:inline-flex;align-items:center;gap:var(--space-sm);background:#fff;padding:var(--space-md) var(--space-lg);border-radius:var(--radius-full);font-weight:700;font-size:.95rem;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s;color:var(--near-black)}.genre-tag:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ff8c0026}.genre-tag .genre-emoji{font-size:1.3rem}.cta-section{background:var(--snow);text-align:center;padding:80px 0 100px}.cta-box{background:#fff;border-radius:var(--radius-xl);padding:60px 40px;box-shadow:0 8px 40px #ff8c001a;max-width:700px;margin:0 auto}.cta-badge{display:inline-block;background:var(--gradient-brand);color:#fff;padding:6px 20px;border-radius:var(--radius-full);font-size:.85rem;font-weight:800;margin-bottom:24px}.cta-title{font-size:2rem;font-weight:900;margin-bottom:var(--space-md);color:var(--near-black)}.cta-title .highlight{color:var(--primary)}.cta-desc{font-size:1rem;color:var(--dark-gray);margin-bottom:30px}.cta-buttons{display:flex;justify-content:center;gap:var(--space-md);flex-wrap:wrap}.cta-store-btn{display:inline-flex;align-items:center;gap:10px;background:var(--gradient-brand);color:#fff;padding:14px 28px;border-radius:var(--radius-md);font-weight:700;font-size:1rem;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 15px #ff8c004d}.cta-store-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px #ff8c0066}.cta-store-btn .btn-icon{font-size:1.5rem}.footer{background:var(--navy);color:#fff;padding:60px 0 30px}.footer-inner{display:flex;justify-content:space-between;gap:40px;margin-bottom:40px}.footer-brand .footer-logo{font-size:1.4rem;font-weight:900;margin-bottom:var(--space-md);display:flex;align-items:center;gap:10px}.footer-brand .footer-logo-icon{width:36px;height:36px;background:var(--gradient-brand);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1rem;font-family:Poppins,Inter,sans-serif;font-weight:800}.footer-brand p{font-size:.85rem;opacity:.6;max-width:300px;line-height:1.6}.footer-links h4{font-size:.85rem;font-weight:700;margin-bottom:var(--space-md);opacity:.5;text-transform:uppercase;letter-spacing:1px}.footer-links a{display:block;font-size:.9rem;opacity:.7;padding:var(--space-xs) 0;transition:opacity .2s}.footer-links a:hover{opacity:1}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;text-align:center;font-size:.8rem;opacity:.4}@media(max-width:900px){.hero{padding:120px 0 60px;min-height:auto}.hero-inner{flex-direction:column;text-align:center}.hero-title{font-size:2.2rem}.hero-stats,.store-buttons{justify-content:center}.hero-mockup{flex:none}.about-grid{grid-template-columns:1fr;max-width:400px;margin-left:auto;margin-right:auto}.modes-grid{grid-template-columns:1fr;max-width:400px;margin:0 auto}.exchange-grid{grid-template-columns:repeat(2,1fr)}.gacha-flex{flex-direction:column;text-align:center}.gacha-visual{flex:none}.gacha-items{justify-content:center}.footer-inner{flex-direction:column;text-align:center}.header-nav a:not(.header-cta){display:none}}@media(max-width:600px){:root{--section-padding: 48px 0}.hero-title{font-size:1.8rem}.hero-subtitle{font-size:1rem}.section-title{font-size:1.5rem}.phone-mockup{width:230px;height:460px}.exchange-grid{grid-template-columns:1fr 1fr;gap:var(--space-md)}.gacha-machine{width:240px;height:310px}.gacha-window{width:160px;height:160px;padding:var(--space-lg)}.gacha-ball{width:28px;height:28px}.cta-box{padding:40px var(--space-lg)}.store-btn{padding:10px 18px}}.legal-main{padding:100px 24px 60px;max-width:800px;margin:0 auto;min-height:calc(100vh - 200px)}.legal-container{background:#fff;border-radius:16px;box-shadow:0 2px 20px #0000000f;padding:48px 40px}.legal-container h1{font-size:1.8rem;font-weight:900;color:var(--primary);margin-bottom:32px;padding-bottom:16px;border-bottom:3px solid var(--primary)}.legal-container h2{font-size:1.3rem;font-weight:800;color:var(--text-dark);margin-top:36px;margin-bottom:12px;padding-left:12px;border-left:4px solid var(--primary)}.legal-container h3{font-size:1.1rem;font-weight:700;color:var(--text-dark);margin-top:24px;margin-bottom:8px}.legal-container p{font-size:.95rem;line-height:1.85;color:var(--text-gray);margin-bottom:16px}.legal-container ul{margin:12px 0 16px 20px;padding:0}.legal-container li{font-size:.95rem;line-height:1.85;color:var(--text-gray);margin-bottom:8px}.legal-container a{color:var(--primary);text-decoration:underline}.legal-container a:hover{color:var(--primary-dark)}.legal-footer{background:var(--navy);color:#fff;padding:24px 0}.legal-footer-inner{max-width:800px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center;font-size:.8rem;opacity:.6}.legal-footer-links{display:flex;gap:16px}.legal-footer-links a{color:#fff;opacity:.8;transition:opacity .2s}.legal-footer-links a:hover{opacity:1}@media(max-width:600px){.legal-container{padding:32px 20px}.legal-container h1{font-size:1.4rem}.legal-footer-inner{flex-direction:column;gap:12px;text-align:center}}