:root { font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; color: #252b28; background: #f0f0eb; }
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; }
button, input { font: inherit; }
[hidden] { display: none !important; }
.auth-layout { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: linear-gradient(#14251b40, #14251b5c), url('/shanshui-landscape.jpg') center / cover; }
.auth-panel { width: min(410px, 100%); padding: 34px; background: #fdfdfa; border: 1px solid #bec7be; box-shadow: 0 16px 48px #10201542; }
.brand { display: flex; gap: 12px; align-items: center; margin-bottom: 38px; }
.brand > span { display: grid; place-items: center; width: 42px; height: 42px; background: #a44638; color: #fff; font-size: 25px; font-weight: 700; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 20px; }
.brand small { margin-top: 2px; color: #8a968e; font-size: 11px; }
.eyebrow { margin: 0 0 7px; color: #4a7458; font-size: 12px; font-weight: 700; }
h1 { margin: 0; font-size: 25px; }
.auth-message { min-height: 23px; margin: 11px 0 24px; color: #69776d; font-size: 13px; line-height: 1.6; }
form { display: grid; gap: 17px; }
label { display: grid; gap: 8px; color: #435347; font-size: 13px; font-weight: 600; }
input { width: 100%; height: 42px; border: 1px solid #bcc6be; border-radius: 3px; background: #fff; padding: 0 12px; color: #28372d; outline-color: #4f8060; }
button { height: 43px; margin-top: 5px; border: 0; border-radius: 3px; background: #263f30; color: #fff; font-size: 14px; font-weight: 700; cursor: pointer; }
button:hover { background: #375840; }
button:disabled { opacity: .6; cursor: wait; }
.auth-error { margin: 17px 0 0; color: #a23d32; font-size: 12px; }
@media (max-width: 500px) { .auth-layout { padding: 16px; } .auth-panel { padding: 27px 22px; } }