body{font-family:'Microsoft YaHei',Arial,sans-serif;background:#f8f8f8;margin:0;padding:0;min-height:100vh;display:flex;align-items:center;justify-content:center}
.card{max-width:900px;width:92vw;background:#fff;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,0.08);padding:40px 30px}
.title{font-size:44px;color:#1976d2;text-align:center;margin:0 0 6px 0}
.subtitle{text-align:center;color:#666;margin:0 0 20px 0}
.task-list{list-style:none;padding:0;margin:10px auto 0 auto;max-width:600px;display:flex;flex-direction:column;gap:12px}
.task-list a{display:block;padding:14px 18px;border:1px solid #1976d2;border-radius:8px;text-decoration:none;color:#1976d2;font-size:20px;text-align:center;transition:all .2s;background:#fff}
.task-list a:hover{background:#e3f2fd}
.task-list a.visited{background:#1976d2;color:#fff}