:root{--blue:#2463df;--blue2:#3487f4;--ink:#17233a;--muted:#738097;--line:#dfe6f0;--soft:#f5f8fd;--danger:#c93f4d;--success:#197a49}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink)}
body.admin-login-page{min-height:100vh;padding:32px;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 12% 18%,rgba(255,255,255,.22),transparent 28%),linear-gradient(135deg,#1551d8 0%,#347ef2 52%,#24b3dc 100%)}
.login-shell{width:min(1020px,100%);min-height:590px;display:grid;grid-template-columns:1.08fr .92fr;background:#fff;border-radius:24px;overflow:hidden;box-shadow:0 28px 75px rgba(13,45,116,.28);border:1px solid rgba(255,255,255,.55)}
.login-brand-panel{position:relative;padding:58px 54px;color:#fff;background:linear-gradient(150deg,#173a91 0%,#1d63db 55%,#2d8de9 100%);overflow:hidden}
.login-brand-panel:before,.login-brand-panel:after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.08)}.login-brand-panel:before{width:330px;height:330px;right:-140px;top:-100px}.login-brand-panel:after{width:240px;height:240px;left:-90px;bottom:-110px}
.brand-kicker,.form-kicker{font-size:12px;font-weight:800;letter-spacing:.18em}.brand-kicker{opacity:.82}.brand-logo{margin-top:28px;font-size:27px;font-weight:850;letter-spacing:.04em}.brand-logo span,.mobile-brand span{font-size:.7em;vertical-align:super;margin-left:2px}.login-brand-panel h1{margin:54px 0 12px;font-size:39px;line-height:1.15}.brand-lead{max-width:420px;margin:0;color:rgba(255,255,255,.82);font-size:16px;line-height:1.8}
.feature-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:38px}.feature-grid div{padding:16px;border:1px solid rgba(255,255,255,.16);border-radius:14px;background:rgba(255,255,255,.08);backdrop-filter:blur(4px)}.feature-grid b,.feature-grid span{display:block}.feature-grid b{font-size:15px}.feature-grid span{margin-top:5px;font-size:12px;color:rgba(255,255,255,.72)}.brand-security{position:absolute;left:54px;bottom:34px;margin:0;font-size:12px;color:rgba(255,255,255,.68)}
.login-form-panel{padding:54px 52px 38px;display:flex;flex-direction:column;justify-content:center;background:#fff}.mobile-brand{display:none;color:var(--blue);font-weight:850;font-size:22px}.form-kicker{color:var(--blue)}.form-heading h2{margin:9px 0 6px;font-size:30px}.form-heading p{margin:0 0 28px;color:var(--muted);font-size:14px}
.login-alerts{margin-bottom:18px}.login-alert{padding:11px 13px;border-radius:10px;font-size:13px;line-height:1.5}.login-alert-error{background:#fff0f1;color:#a6303d;border:1px solid #ffd7dc}.login-alert-success{background:#ebf9f1;color:#176a42;border:1px solid #cdeedc}.login-alert-warning{background:#fff8e7;color:#91630a;border:1px solid #f5e2aa}
.field-group{margin-bottom:19px}.field-group label{display:block;margin-bottom:8px;font-size:14px;font-weight:700}.input-wrap{position:relative}.input-wrap input,.captcha-row input{width:100%;height:48px;border:1px solid var(--line);border-radius:11px;background:#fbfcfe;padding:0 48px 0 42px;font:inherit;font-size:16px;outline:none;transition:.18s}.input-wrap input:focus,.captcha-row input:focus{border-color:var(--blue2);box-shadow:0 0 0 4px rgba(52,135,244,.12);background:#fff}.input-icon{position:absolute;left:15px;top:50%;transform:translateY(-50%);font-size:9px;color:#7ea6e8}.password-toggle{position:absolute;right:10px;top:50%;transform:translateY(-50%);border:0;background:transparent;color:var(--blue);font-size:13px;cursor:pointer;padding:7px}.field-error{min-height:0;margin-top:5px;color:var(--danger);font-size:12px}
.captcha-row{display:grid;grid-template-columns:minmax(110px,1fr) 92px 62px;gap:8px}.captcha-row input{padding:0 12px}.captcha-code,.captcha-refresh{height:48px;border-radius:10px;border:1px solid var(--line);cursor:pointer}.captcha-code{font-weight:900;letter-spacing:.22em;background:linear-gradient(135deg,#edf3ff,#f8fbff);color:#1c3d78}.captcha-refresh{background:#fff;color:#566279}
.login-submit{width:100%;height:50px;margin-top:3px;border:0;border-radius:11px;background:linear-gradient(90deg,var(--blue),#2e75e8);color:#fff;font-size:16px;font-weight:750;cursor:pointer;box-shadow:0 10px 22px rgba(36,99,223,.22);transition:.18s}.login-submit:hover{transform:translateY(-1px);box-shadow:0 13px 27px rgba(36,99,223,.27)}.login-submit:disabled{opacity:.72;cursor:wait;transform:none}.login-footnote{display:flex;justify-content:space-between;gap:16px;margin-top:25px;padding-top:18px;border-top:1px solid #edf0f5;color:#98a1b1;font-size:11px}
@media(max-width:820px){body.admin-login-page{padding:20px;align-items:flex-start}.login-shell{grid-template-columns:1fr;min-height:0;max-width:560px}.login-brand-panel{display:none}.login-form-panel{padding:34px 28px}.mobile-brand{display:block;margin-bottom:26px}.form-heading h2{font-size:27px}.login-footnote{flex-direction:column;gap:5px}.captcha-row{grid-template-columns:1fr 86px}.captcha-refresh{grid-column:1/-1;height:40px}}
@media(max-width:460px){body.admin-login-page{padding:12px;background:linear-gradient(160deg,#1c5be0,#3b8df4)}.login-shell{border-radius:18px}.login-form-panel{padding:28px 20px 24px}.form-heading p{margin-bottom:23px}.input-wrap input,.captcha-row input{height:50px}.login-submit{height:52px}.captcha-row{grid-template-columns:1fr 82px}.mobile-brand{font-size:21px}}