*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 16% 8%,rgba(59,130,246,.2),transparent 30%),radial-gradient(circle at 86% 18%,rgba(14,165,233,.18),transparent 28%),linear-gradient(145deg,#edf6ff,#f8fafc 52%,#eef2f7);font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:#172033}.card{width:min(440px,calc(100vw - 32px));background:rgba(255,255,255,.92);border:1px solid rgba(226,232,240,.9);border-radius:24px;box-shadow:0 24px 70px rgba(15,23,42,.14);padding:34px;backdrop-filter:blur(14px)}.logo{font-size:26px;font-weight:900;color:#1769e0}.slogan{margin-top:8px;font-size:16px;font-weight:800;color:#172033}.hint{margin:8px 0 20px;color:#667085;font-size:13px;line-height:1.7}label{display:block;margin:12px 0 6px;font-size:13px;color:#475467}input{width:100%;height:45px;border:1px solid #d0d5dd;border-radius:12px;padding:0 12px;font-size:14px;outline:0;background:#fff}input:focus{border-color:#1769e0;box-shadow:0 0 0 4px #dbeafe}.captcha{display:grid;grid-template-columns:1fr 110px;gap:10px}.captcha img{height:45px;width:110px;border-radius:12px;border:1px solid #d0d5dd;cursor:pointer;background:#fff}button{width:100%;height:48px;border:1px solid rgba(255,255,255,.6);border-radius:12px;background:linear-gradient(135deg, rgba(23,105,224,.92), rgba(14,165,233,.78));color:#fff;font-size:15px;font-weight:800;margin-top:20px;cursor:pointer;box-shadow:inset 0 1px 0 rgba(255,255,255,.5), inset 0 -1px 0 rgba(13,60,130,.38), 0 12px 24px rgba(23,105,224,.28);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);text-shadow:0 1px 2px rgba(9,48,105,.4)}.error{min-height:20px;margin-top:10px;color:#d92d20;font-size:13px}a{display:block;text-align:center;margin-top:12px;color:#1769e0;text-decoration:none;font-size:13px}

/* 品牌标识与注册表单统一排列，适配手机宽度。 */
.logo{display:flex;align-items:center;gap:10px;font-size:24px;color:#1c1919}.register-brand-logo{width:36px;height:36px;object-fit:contain}.register-heading{font-size:19px;margin:20px 0 0}@media(max-width:420px){.card{padding:24px}.logo{font-size:22px}.register-brand-logo{width:32px;height:32px}}