/* Login-only skin. Shared dashboard styles and all authentication behavior stay unchanged. */
@font-face {
    font-family: "Login Noto Serif";
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url("/static/admin/fonts/noto-serif-sc-login-700.ttf?v=2026092502") format("truetype");
}
body.sandstone-login-page {
    --sand-paper: #f5f2eb;
    --sand-ink: #382b23;
    --sand-muted: #73675e;
    --sand-border: #c9c1b7;
    --sand-rust: #a94e33;
    --sand-rust-hover: #903f28;
    margin: 0;
    background: var(--sand-paper);
    color: var(--sand-ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
.sandstone-login-page *, .sandstone-login-page *::before, .sandstone-login-page *::after { box-sizing: border-box; }
.sandstone-login-page :is(input, button) { font: inherit; letter-spacing: 0; }
.sandstone-login-page :is(button, input, a, [tabindex]):focus-visible { outline: 2px solid var(--sand-rust); outline-offset: 4px; }
.sandstone-shell { display: grid; grid-template-columns: minmax(0, 49.1%) minmax(0, 50.9%); min-height: 100vh; min-height: 100svh; }
.sandstone-panel { min-width: 0; padding: clamp(32px, 5.1vh, 54px) clamp(36px, 7.1vw, 106px) 40px; }
.sandstone-brand { display: flex; flex-direction: column; gap: 1px; }
.sandstone-brand strong { color: var(--sand-ink); font-size: 40px; font-weight: 650; line-height: 1.2; letter-spacing: .5px; overflow-wrap: anywhere; }
.sandstone-brand span { color: var(--sand-ink); font-size: 20px; line-height: 1.45; }
.sandstone-login-page .v2-login-form { width: 100%; margin-top: 53px; }
.sandstone-intro { margin-bottom: 36px; }
.sandstone-intro hr { width: 36px; height: 0; margin: 0 0 29px; border: 0; border-top: 2px solid #b57a62; background: none; }
.sandstone-intro h1 { margin: 0; color: var(--sand-ink); font-family: "Login Noto Serif", "Songti SC", "STSong", "SimSun", serif; font-size: clamp(42px, 4.3vw, 64px); font-weight: 700; line-height: 1.1; letter-spacing: 0; }
.sandstone-intro p { margin: 12px 0 0; color: #746257; font-size: clamp(16px, 1.55vw, 23px); line-height: 1.35; }
.sandstone-login-page .v2-login-field { margin-bottom: 23px; }
.sandstone-login-page .v2-login-field > label { display: block; margin-bottom: 10px; color: var(--sand-ink); font-size: 18px; font-weight: 500; line-height: 1.5; }
.sandstone-login-page .v2-login-input { display: flex; align-items: center; gap: 13px; height: 56px; padding: 0 17px; border: 1px solid var(--sand-border); border-radius: 6px; background: transparent; transition: border-color .16s, box-shadow .16s; }
.sandstone-login-page .v2-login-input:focus-within { border-color: var(--sand-rust); box-shadow: 0 0 0 3px rgb(169 78 51 / 10%); }
.sandstone-login-page .v2-login-input > i { flex: none; color: #82756b; font-size: 22px; }
.sandstone-login-page .v2-login-input input { flex: 1; min-width: 0; width: 100%; height: 100%; padding: 0; color: var(--sand-ink); background: transparent; border: 0; outline: 0; font-size: 18px; }
.sandstone-login-page .v2-login-input input::placeholder { color: #8a8178; opacity: 1; }
.sandstone-login-page .v2-login-input:has(input.layui-form-danger) { border-color: #a83226; }
.sandstone-login-page .v2-login-input input.layui-form-danger { box-shadow: none !important; }
.sandstone-login-page #togglePassword { display: flex; flex: 0 0 44px; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0; margin-right: -10px; border: 0; border-radius: 4px; background: transparent; color: #82756b; cursor: pointer; }
.sandstone-login-page #togglePassword i { font-size: 22px; }
.sandstone-login-page #togglePassword:hover { color: var(--sand-rust); background: #ebe5db; }
.sandstone-login-page #refreshMathChallenge { display: flex; align-items: center; width: 100%; height: 56px; padding: 0 7px 0 0; gap: 4px; color: var(--sand-rust); border: 1px solid var(--sand-border); background: transparent; border-radius: 6px; overflow: hidden; cursor: pointer; }
.sandstone-login-page #refreshMathChallenge img { display: block; min-width: 0; width: 100%; height: 100%; object-fit: contain; }
.sandstone-login-page #refreshMathChallenge span { flex: none; font-size: 12px; writing-mode: vertical-rl; letter-spacing: 2px; }
.sandstone-login-page #refreshMathChallenge:hover { border-color: var(--sand-rust); }
.sandstone-login-page #refreshMathChallenge:disabled { opacity: .6; cursor: wait; }
.sandstone-login-page .v2-login-captcha { display: grid; grid-template-columns: minmax(0, 1fr) 126px; gap: 12px; }
.sandstone-login-page #refreshCaptcha { height: 56px; padding: 0; border: 1px solid var(--sand-border); border-radius: 6px; overflow: hidden; cursor: pointer; background: var(--sand-paper); }
.sandstone-login-page #codeimg { display: block; width: 100%; height: 54px; object-fit: contain; }
.sandstone-login-page .v2-login-verification { margin-bottom: 23px; }
.sandstone-login-page .v2-login-verification > button, .sandstone-login-page .v2-login-verified { display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%; min-height: 56px; padding: 12px; color: var(--sand-ink); border: 1px solid var(--sand-border); border-radius: 6px; background: transparent; cursor: pointer; }
.sandstone-login-page .v2-login-verified { color: #35664d; border-color: #a7b7a7; cursor: default; }
.sandstone-login-page #geetest_captcha { width: 100%; }
.sandstone-login-page .v2-login-options { display: flex; align-items: center; min-height: 28px; margin: 0 0 26px; }
.sandstone-remember { display: inline-flex; align-items: center; gap: 10px; min-height: 28px; color: #776a60; font-size: 17px; line-height: 22px; cursor: pointer; }
.sandstone-login-page .sandstone-remember input { display: inline-block; flex: none; width: 20px; height: 20px; margin: 0; accent-color: var(--sand-rust); cursor: pointer; }
.sandstone-login-page .v2-login-submit { display: flex; align-items: center; justify-content: center; width: 100%; height: 60px; padding: 0 18px; border: 1px solid var(--sand-rust); border-radius: 6px; background: var(--sand-rust); color: #fff; font-size: 20px; font-weight: 650; cursor: pointer; transition: background .16s, border-color .16s; }
.sandstone-login-page .v2-login-submit:hover { background: var(--sand-rust-hover); border-color: var(--sand-rust-hover); }
.sandstone-login-page .v2-login-submit:active { background: #803621; }
.sandstone-login-page .v2-login-note { margin-top: 27px; color: #8a7f75; font-size: 15px; line-height: 1.6; }
.sandstone-scene { position: sticky; top: 0; align-self: start; height: 100vh; height: 100svh; min-height: 620px; overflow: hidden; background: #d4b291; }
.sandstone-scene > img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.sandstone-scene-brand { position: absolute; top: 52px; right: 54px; display: flex; flex-direction: column; align-items: flex-start; gap: 2px; color: #80736a; }
.sandstone-scene-brand strong { font-size: 29px; line-height: 1.2; font-weight: 600; }
.sandstone-scene-brand span { font-size: 16px; line-height: 1.5; }
.sandstone-login-page .layui-layer { border-radius: 6px; }

@media (min-width: 821px) and (max-height: 900px) {
    .sandstone-panel { padding-top: 30px; padding-bottom: 30px; }
    .sandstone-brand strong { font-size: 32px; }
    .sandstone-brand span { font-size: 16px; }
    .sandstone-login-page .v2-login-form { margin-top: 28px; }
    .sandstone-intro { margin-bottom: 28px; }
    .sandstone-intro hr { margin-bottom: 18px; }
    .sandstone-intro h1 { font-size: clamp(36px, 3.6vw, 50px); }
    .sandstone-intro p { margin-top: 12px; font-size: 17px; }
    .sandstone-login-page .v2-login-field { margin-bottom: 16px; }
    .sandstone-login-page .v2-login-field > label { font-size: 15px; margin-bottom: 7px; }
    .sandstone-login-page .v2-login-input { height: 48px; }
    .sandstone-login-page .v2-login-input input { font-size: 16px; }
    .sandstone-login-page #refreshMathChallenge { height: 48px; }
    .sandstone-login-page .v2-login-options { margin-bottom: 18px; }
    .sandstone-login-page .v2-login-submit { height: 52px; font-size: 17px; }
    .sandstone-login-page .v2-login-note { margin-top: 18px; font-size: 12px; }
}
@media (min-width: 821px) and (max-width: 1120px) {
    .sandstone-shell { grid-template-columns: minmax(0, 54%) minmax(0, 46%); }
    .sandstone-panel { padding-inline: 42px; }
    .sandstone-scene-brand { right: 25px; }
}
@media (min-width: 821px) and (max-height: 760px) {
    .sandstone-panel { padding-top: 24px; padding-bottom: 24px; }
    .sandstone-brand strong { font-size: 28px; }
    .sandstone-brand span { font-size: 14px; }
    .sandstone-login-page .v2-login-form { margin-top: 20px; }
    .sandstone-intro { margin-bottom: 20px; }
    .sandstone-intro hr { margin-bottom: 12px; }
    .sandstone-intro h1 { font-size: 40px; }
    .sandstone-intro p { font-size: 15px; }
    .sandstone-login-page .v2-login-field { margin-bottom: 12px; }
    .sandstone-login-page .v2-login-field > label { font-size: 14px; }
    .sandstone-login-page .v2-login-input { height: 44px; }
    .sandstone-login-page #refreshMathChallenge { height: 44px; }
    .sandstone-login-page .v2-login-options { margin-bottom: 12px; }
    .sandstone-remember { font-size: 14px; }
    .sandstone-login-page .v2-login-submit { height: 48px; }
    .sandstone-login-page .v2-login-note { margin-top: 14px; font-size: 12px; }
}
@media (max-width: 820px) {
    .sandstone-shell { display: block; }
    .sandstone-scene { display: none; }
    .sandstone-panel { width: min(600px, 100%); margin-inline: auto; padding: 32px 30px 24px; }
    .sandstone-brand strong { font-size: 30px; }
    .sandstone-brand span { font-size: 16px; }
    .sandstone-login-page .v2-login-form { margin-top: 30px; }
    .sandstone-intro { margin-bottom: 24px; }
    .sandstone-intro hr { width: 30px; margin-bottom: 23px; }
    .sandstone-intro h1 { font-size: 42px; }
    .sandstone-intro p { margin-top: 13px; font-size: 16px; }
    .sandstone-login-page .v2-login-field { margin-bottom: 19px; }
    .sandstone-login-page .v2-login-field > label { font-size: 15px; margin-bottom: 8px; }
    .sandstone-login-page .v2-login-input { height: 52px; padding-inline: 13px; gap: 10px; }
    .sandstone-login-page .v2-login-input input { font-size: 16px; }
    .sandstone-login-page .v2-login-input > i { font-size: 20px; }
    .sandstone-login-page #refreshMathChallenge { height: 52px; }
    .sandstone-login-page .sandstone-digit-captcha { grid-template-columns: minmax(0, 1fr) 118px; gap: 10px; }
    .sandstone-login-page .v2-login-options { min-height: 32px; margin-bottom: 20px; }
    .sandstone-remember { font-size: 15px; }
    .sandstone-login-page .v2-login-submit { height: 56px; font-size: 18px; }
    .sandstone-login-page .v2-login-note { margin-top: 22px; font-size: 12px; }
}
@media (max-width: 360px) {
    .sandstone-panel { padding-inline: 22px; }
    .sandstone-intro h1 { font-size: 38px; }
    .sandstone-login-page .sandstone-digit-captcha { grid-template-columns: minmax(0, 1fr) 104px; gap: 8px; }
    .sandstone-login-page .sandstone-digit-captcha .v2-login-input { padding-inline: 10px; }
    .sandstone-login-page .sandstone-digit-captcha .v2-login-input > i { display: none; }
}
@media (prefers-reduced-motion: reduce) {
    .sandstone-login-page *, .sandstone-login-page *::before, .sandstone-login-page *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}