*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--navy:#0b1d3a;--blue:#1a56db;--sky:#3b82f6;--light:#e8f0fe;--white:#fff;--gray50:#f8fafc;--gray100:#f1f5f9;--gray400:#94a3b8;--gray600:#475569;--gray800:#1e293b;--green:#059669;--purple:#7c3aed;--gold:#d97706;--radius:12px}
body{font-family:'Inter',sans-serif;color:var(--gray800);background:var(--gray50)}
a{text-decoration:none;color:inherit}
nav{background:var(--navy);display:flex;align-items:center;justify-content:space-between;padding:0 40px;height:64px;position:sticky;top:0;z-index:100}
.nav-logo{font-size:1.25rem;font-weight:800;color:#fff;letter-spacing:.05em}
.nav-logo span{color:var(--sky)}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{color:#94a3b8;font-size:.88rem;font-weight:500;transition:color .2s}
.nav-links a:hover{color:#fff}
.nav-btn{background:var(--blue);color:#fff!important;padding:8px 18px;border-radius:8px;font-weight:600!important}
.breadcrumb{background:#fff;border-bottom:1px solid #e2e8f0;padding:12px 40px;font-size:.82rem;color:var(--gray400)}
.breadcrumb a{color:var(--blue)}
.breadcrumb span{margin:0 8px}
.page-header{background:linear-gradient(135deg,var(--navy),#1a3a6e);padding:48px 40px 40px;text-align:center}
.ph-tag{display:inline-block;background:rgba(59,130,246,.2);color:#93c5fd;border:1px solid rgba(59,130,246,.3);padding:5px 14px;border-radius:999px;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-bottom:16px}
.page-header h1{font-size:2rem;font-weight:800;color:#fff;margin-bottom:10px}
.page-header p{color:#93c5fd;font-size:1rem;max-width:560px;margin:0 auto}
.cat-tabs{background:#fff;border-bottom:1px solid #e2e8f0;display:flex;gap:0;padding:0 40px;overflow-x:auto}
.cat-tab{padding:14px 20px;font-size:.88rem;font-weight:600;color:var(--gray400);border-bottom:3px solid transparent;white-space:nowrap;cursor:pointer;transition:all .2s}
.cat-tab a{color:inherit}
.cat-tab.active{color:var(--blue);border-bottom-color:var(--blue)}
.cat-tab:hover{color:var(--gray800)}
.container{max-width:1100px;margin:0 auto;padding:40px 20px}
.layout{display:grid;grid-template-columns:1fr 300px;gap:32px}
.scenario-card{background:#fff;border-radius:var(--radius);border:1px solid #e2e8f0;margin-bottom:24px;overflow:hidden}
.sc-header{background:var(--navy);padding:20px 28px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.sc-num{background:var(--blue);color:#fff;min-width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem;flex-shrink:0}
.sc-title{color:#fff;font-size:1rem;font-weight:700;flex:1}
.sc-badge{padding:4px 12px;border-radius:999px;font-size:.75rem;font-weight:700;text-transform:uppercase;white-space:nowrap}
.badge-4p{background:rgba(59,130,246,.25);color:#93c5fd}
.badge-6p{background:rgba(124,58,237,.25);color:#c4b5fd}
.badge-sp{background:rgba(5,150,105,.25);color:#6ee7b7}
.badge-atc{background:rgba(217,119,6,.25);color:#fcd34d}
.sc-body{padding:28px}
.scenario-text{background:var(--gray50);border-left:4px solid var(--blue);border-radius:0 var(--radius) var(--radius) 0;padding:20px 24px;margin-bottom:24px}
.scenario-text .label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--blue);margin-bottom:8px}
.scenario-text p{font-size:.95rem;line-height:1.8;color:var(--gray800)}
.panels-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:24px}
.panel-box{background:var(--gray100);border-radius:8px;padding:16px;border:1px solid #e2e8f0}
.panel-num{font-size:.7rem;font-weight:700;color:var(--blue);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}
.panel-box p{font-size:.85rem;line-height:1.6;color:var(--gray600)}
.qa-section{margin-top:24px}
.qa-title{font-size:.9rem;font-weight:700;color:var(--navy);margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--gray100)}
.qa-item{margin-bottom:14px}
.qa-q{background:var(--light);border-radius:8px 8px 0 0;padding:12px 16px;font-size:.88rem;font-weight:600;color:var(--navy);display:flex;gap:10px}
.qa-q .qnum{background:var(--blue);color:#fff;min-width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:700;flex-shrink:0;margin-top:1px}
.qa-a{background:#fff;border:1px solid #e2e8f0;border-top:none;border-radius:0 0 8px 8px;padding:12px 16px;font-size:.88rem;line-height:1.7;color:var(--gray600)}
.vocab-box{background:#fff;border:1px solid #e2e8f0;border-radius:var(--radius);padding:20px 24px;margin-top:20px}
.vocab-title{font-size:.82rem;font-weight:700;color:var(--navy);text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}
.vocab-list{display:flex;flex-wrap:wrap;gap:8px}
.vocab-tag{background:var(--light);color:var(--blue);padding:4px 12px;border-radius:999px;font-size:.78rem;font-weight:600}
.sidebar{}
.sidebar-card{background:#fff;border-radius:var(--radius);border:1px solid #e2e8f0;padding:20px;margin-bottom:20px}
.sidebar-title{font-size:.82rem;font-weight:700;color:var(--navy);text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--gray100)}
.set-links a{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--gray100);font-size:.85rem;color:var(--gray800);transition:color .2s}
.set-links a:last-child{border-bottom:none}
.set-links a:hover{color:var(--blue)}
.set-badge{font-size:.7rem;padding:2px 8px;border-radius:999px;font-weight:600}
.set-badge.free{background:#dcfce7;color:#16a34a}
.set-badge.pro{background:#fef3c7;color:var(--gold)}
.arrow{color:var(--gray400);font-size:.8rem}
.tip-box{background:linear-gradient(135deg,var(--navy),#1a3a6e);border-radius:var(--radius);padding:20px;color:#fff}
.tip-box h4{font-size:.9rem;font-weight:700;margin-bottom:8px;color:#60a5fa}
.tip-box p{font-size:.82rem;line-height:1.6;color:#93c5fd}
.tip-box a{color:#fff;font-weight:600;font-size:.82rem;display:block;margin-top:12px}
.pagination{display:flex;gap:8px;align-items:center;justify-content:center;margin-top:32px}
.page-btn{padding:8px 16px;border-radius:8px;font-size:.85rem;font-weight:600;background:#fff;border:1px solid #e2e8f0;color:var(--gray600);cursor:pointer;transition:all .2s}
.page-btn.active{background:var(--blue);color:#fff;border-color:var(--blue)}
.page-btn:hover:not(.active){border-color:var(--sky);color:var(--blue)}
@media(max-width:768px){nav{padding:0 16px}.breadcrumb,.cat-tabs{padding-left:16px;padding-right:16px}.page-header{padding:32px 16px}.container{padding:24px 16px}.layout{grid-template-columns:1fr}.sidebar{order:-1}.panels-grid{grid-template-columns:1fr}}