* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; width: 100%; min-height: 100%; font-family: Arial, "Microsoft YaHei", sans-serif; }
body { background: #f5f7fb; }
.page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.card { width: 100%; max-width: 430px; background: #fff; border-radius: 18px; padding: 35px; box-shadow: 0 10px 40px rgba(0,0,0,.08); }
.logo { font-size: 20px; font-weight: bold; margin-bottom: 20px; }
h1 { margin: 0 0 10px; font-size: 28px; }
.description { color: #777; line-height: 1.6; margin-bottom: 30px; }
.form-group { margin-bottom: 20px; }
label { display: block; font-weight: 600; margin-bottom: 8px; }
input { width: 100%; height: 48px; padding: 0 14px; border: 1px solid #ddd; border-radius: 8px; font-size: 16px; outline: none; }
input:focus { border-color: #333; }
button { width: 100%; height: 50px; border: none; border-radius: 8px; background: #111; color: #fff; font-size: 16px; cursor: pointer; }
button:disabled { opacity: .6; cursor: not-allowed; }
.message { margin-top: 15px; text-align: center; color: #666; min-height: 20px; }
@media (max-width: 480px) { .card { padding: 25px; } h1 { font-size: 24px; } }