*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{--color-primary:#3DB54A;--color-bg:#F5F5F3;--color-text:#1A1A1A;--color-text-secondary:#6B6B6B;--color-white:#FFFFFF;--font-heading:'Poppins',sans-serif;--font-body:'Inter',sans-serif;--radius-card:16px;--shadow-card:0 4px 16px rgba(0,0,0,0.07);--nav-height:68px}
html,body{height:100%;background:var(--color-bg);font-family:var(--font-body);color:var(--color-text);-webkit-font-smoothing:antialiased}
.app{max-width:430px;min-height:100%;margin:0 auto;background:var(--color-bg)}
.header{position:sticky;top:0;z-index:20;background:var(--color-white);border-bottom:1px solid rgba(0,0,0,0.06);padding:14px 20px}
.header-title{font-family:var(--font-heading);font-weight:800;font-size:20px}
.content{padding:16px 20px;padding-bottom:calc(var(--nav-height) + 32px);display:flex;flex-direction:column;gap:12px}
.static-back{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--color-primary);text-decoration:none;-webkit-tap-highlight-color:transparent;margin-bottom:4px}
.static-back:active{opacity:0.65}
.faq details{background:var(--color-white);border-radius:12px;box-shadow:var(--shadow-card);padding:14px 16px;margin-bottom:2px}
.faq summary{font-family:var(--font-heading);font-weight:700;font-size:14px;cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:10px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'›';font-size:18px;color:var(--color-text-secondary);transition:transform 0.2s ease}
.faq details[open] summary::after{transform:rotate(90deg)}
.faq .faq-a{padding-top:10px;font-size:14px;line-height:1.5;color:var(--color-text-secondary)}
.faq-note{font-size:12px;color:var(--color-text-secondary);padding:0 4px 8px;line-height:1.4}
.bottom-nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:430px;height:var(--nav-height);background:var(--color-white);border-top:1px solid rgba(0,0,0,0.06);display:flex;align-items:center;z-index:30;padding-bottom:env(safe-area-inset-bottom,0)}
.nav-tab{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 2px;cursor:pointer;text-decoration:none;-webkit-tap-highlight-color:transparent;position:relative}
.nav-icon{display:flex;align-items:center;justify-content:center;line-height:1;opacity:0.35;transition:all 0.2s ease}
.nav-icon .ui-icon{width:18px;height:18px}
.nav-label{font-size:8px;font-weight:600;text-transform:uppercase;letter-spacing:0.35px;color:#9E9E9E;text-align:center;line-height:1.1;font-family:var(--font-body)}
.nav-tab.active .nav-icon{opacity:1}
.nav-tab.active .nav-label{color:var(--color-primary)}
.nav-tab.active::after{content:'';position:absolute;top:4px;width:4px;height:4px;border-radius:50%;background:var(--color-primary)}
@media(orientation:landscape)and(max-height:500px){.landscape-warning{display:flex!important}.app{display:none}}
.landscape-warning{display:none;position:fixed;inset:0;background:var(--color-bg);align-items:center;justify-content:center;flex-direction:column;gap:12px;z-index:999;padding:20px;color:var(--color-text-secondary)}
.landscape-warning .rotate-icon{display:flex;align-items:center;justify-content:center}
.landscape-warning .rotate-icon .ui-icon{width:48px;height:48px}