:root{--bg:#f7f3e8;--card:#fffdf6;--ink:#14264a;--muted:#6b7388;--gold:#e9b949;--gold-ink:#6a4b00;--line:#e3dcc6;--me:#fff4d1}@media (prefers-color-scheme:dark){:root{--bg:#0f1a2e;--card:#172540;--ink:#f1ead6;--muted:#98a3bd;--gold:#e9b949;--gold-ink:#1b1400;--line:#26365a;--me:#2a2f3a}}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);-webkit-tap-highlight-color:transparent;margin:0;font-family:-apple-system,PingFang TC,Noto Sans TC,sans-serif}button{font:inherit;color:inherit;background:var(--card);border:1px solid var(--line);cursor:pointer;border-radius:12px;padding:10px 14px}.app{flex-direction:column;max-width:560px;min-height:100dvh;margin:0 auto;display:flex}header{padding:calc(12px + env(safe-area-inset-top)) 16px 8px;justify-content:space-between;align-items:center;display:flex}header b{font-size:20px}header small{color:var(--muted);font-size:13px;font-weight:400}.gtoggle{border-radius:999px;padding:6px 12px}main{flex:1;padding:8px 16px 96px}nav{background:var(--card);border-top:1px solid var(--line);max-width:560px;padding-bottom:env(safe-area-inset-bottom);margin:0 auto;display:flex;position:fixed;bottom:0;left:0;right:0}nav button{color:var(--muted);background:0 0;border:0;border-radius:0;flex:1;padding:14px 0}nav button.on{color:var(--ink);box-shadow:inset 0 3px 0 var(--gold);font-weight:700}h2{margin:8px 0 4px}h3{color:var(--muted);margin:24px 0 8px;font-size:15px}.muted{color:var(--muted)}.small{font-size:13px}.center{text-align:center;padding:18vh 16px 0}.center h1{margin:0 0 8px;font-size:40px}.row{justify-content:center;gap:12px;margin-top:20px;display:flex}.big{flex-direction:column;flex:1;gap:6px;padding:24px 8px;font-size:20px;display:flex}.big small{color:var(--muted);font-size:14px}.hero{text-align:left;background:var(--ink);width:100%;color:var(--bg);border:0;flex-direction:column;gap:4px;padding:20px;font-size:18px;display:flex}.hero small{opacity:.75;font-size:13px}.scn{text-align:left;align-items:center;gap:14px;width:100%;margin-bottom:8px;padding:14px;display:flex}.scn>span:first-child{font-size:28px}.scn small{color:var(--muted);font-size:13px;display:block}.scn i{color:#2f9e5a;margin-left:auto;font-style:normal;font-weight:700}.primary{background:var(--gold);width:100%;color:var(--gold-ink);border:0;margin-top:20px;padding:14px;font-weight:700}.seg{background:var(--line);border-radius:12px;margin:12px 0;padding:3px;display:flex}.seg button{background:0 0;border:0;flex:1}.seg button.on{background:var(--card);font-weight:700}.bubble{background:var(--card);border:1px solid var(--line);border-radius:14px;max-width:92%;margin:10px 0;padding:12px 14px}.bubble.me{background:var(--me);margin-left:auto}.who{color:var(--muted);margin-bottom:4px;font-size:12px}.line-row{justify-content:space-between;align-items:flex-start;gap:10px;display:flex}.rom{font-size:19px;font-weight:600}.th{color:var(--muted);margin:2px 0;font-size:16px}.zh{font-size:15px}.tip{color:var(--gold-ink);background:color-mix(in srgb, var(--gold) 25%, transparent);border-radius:8px;margin-top:8px;padding:6px 8px;font-size:13px}.play{border-radius:999px;flex:none;padding:8px 10px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;margin:10px 0;padding:14px}.pat-title{font-size:18px;font-weight:700}.when{color:var(--muted);margin:2px 0 10px;font-size:13px}.chips{flex-wrap:wrap;gap:6px;margin-bottom:12px;display:flex}.chip{border-radius:999px;padding:6px 12px;font-size:14px}.chip.on{background:var(--gold);color:var(--gold-ink);border-color:var(--gold);font-weight:700}.review{text-align:center;flex-direction:column;justify-content:center;gap:14px;min-height:220px;display:flex}.big-zh{font-size:24px;font-weight:700}.listen{justify-content:center;align-items:center;gap:12px;display:flex}.rates{grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px;display:grid}.opt{text-align:left;width:100%;margin:8px 0;padding:12px 14px;display:block}.opt.right{background:color-mix(in srgb, #2f9e5a 22%, var(--card));border-color:#2f9e5a}.opt.wrong{background:color-mix(in srgb, #d64545 22%, var(--card));border-color:#d64545}.opt.dim{opacity:.55}