*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
body{background:#121212;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:#eee;}
.app-wrapper{max-width:800px;margin:0 auto;position:relative;min-height:100vh;display:flex;flex-direction:column;}
.header{position:sticky;top:0;background:#121212;padding:14px 18px;display:flex;justify-content:space-between;align-items:baseline;border-bottom:1px solid #2c2c2c;z-index:10;backdrop-filter:blur(8px);background-color:rgba(18,18,18,0.92);}
.logo{font-weight:700;font-size:1.6rem;background:linear-gradient(135deg,#fff 0%,#ccc 100%);-webkit-background-clip:text;background-clip:text;color:transparent;}
.slogan{font-size:0.75rem;color:#8e8e8e;background:#1e1e1e;padding:4px 10px;border-radius:30px;}
.waterfall{flex:1;padding:12px 14px;display:flex;flex-direction:column;gap:14px;}
.card{background:#1e1e1e;border-radius:20px;padding:16px 18px;border:1px solid #2a2a2a;}
.card-header{display:flex;justify-content:space-between;font-size:0.7rem;color:#9e9e9e;margin-bottom:10px;}
.card-content{font-size:1rem;line-height:1.45;margin-bottom:14px;word-break:break-word;white-space:pre-wrap;color:#f0f0f0;}
.card-footer{display:flex;gap:28px;align-items:center;}
.action-btn{background:none;border:none;color:#aaa;font-size:0.9rem;display:flex;align-items:center;gap:6px;cursor:pointer;padding:6px 8px 6px 0;}
.like-btn.active{color:#ff3b30;}
.comment-section{margin-top:14px;border-top:1px solid #2c2c2c;padding-top:14px;display:none;}
.comment-section.open{display:block;}
.comment-list{margin-bottom:12px;max-height:200px;overflow-y:auto;display:flex;flex-direction:column;gap:10px;}
.comment-item{font-size:0.8rem;background:#2a2a2a;padding:8px 12px;border-radius:18px;color:#ddd;}
.comment-input-area{display:flex;gap:8px;margin-top:6px;}
.comment-input-area input{flex:1;background:#2c2c2c;border:none;padding:10px 14px;border-radius:30px;color:white;font-size:0.85rem;outline:none;}
.comment-input-area button{background:#3a3a3a;border:none;padding:0 18px;border-radius:30px;color:white;font-weight:600;cursor:pointer;}
.loading{text-align:center;padding:20px;color:#6c6c6c;font-size:0.8rem;}
.footer{text-align:center;padding:24px 16px;font-size:0.7rem;color:#6c6c6c;border-top:1px solid #2c2c2c;margin-top:20px;}
.footer a{color:#8e8e8e;text-decoration:none;margin:0 6px;}
.footer a:hover{color:#ff3b30;}
.fab{position:fixed;bottom:24px;right:24px;width:56px;height:56px;background:#ff3b30;border-radius:28px;display:flex;align-items:center;justify-content:center;font-size:28px;color:white;box-shadow:0 4px 12px rgba(0,0,0,0.4);cursor:pointer;z-index:20;}
.modal-mask{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.8);backdrop-filter:blur(4px);z-index:30;display:flex;align-items:center;justify-content:center;visibility:hidden;opacity:0;transition:0.2s;}
.modal-mask.open{visibility:visible;opacity:1;}
.modal-card{background:#1e1e1e;width:90%;max-width:400px;border-radius:32px;padding:24px 20px;border:1px solid #3a3a3a;}
.modal-card h3{margin-bottom:16px;}
.modal-card textarea{width:100%;background:#2c2c2c;border:none;border-radius:20px;padding:14px;color:white;resize:vertical;margin-bottom:20px;font-family:inherit;}
.modal-actions{display:flex;gap:12px;justify-content:flex-end;}
.modal-actions button{padding:8px 20px;border-radius:40px;border:none;background:#3a3a3a;color:white;cursor:pointer;}
.modal-actions button.primary{background:#ff3b30;}
.toast-msg{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);background:#2c2c2c;color:#eee;padding:8px 18px;border-radius:40px;font-size:0.8rem;opacity:0;transition:0.2s;z-index:40;pointer-events:none;}
.toast-msg.show{opacity:1;}
@media (max-width:600px){.app-wrapper{max-width:100%;}.header{padding:12px 14px;}.card{padding:14px;}.fab{bottom:16px;right:16px;width:48px;height:48px;font-size:24px;}}