:root {
    --login-bg: #edf5fb;
    --login-bg-strong: #f8fbff;
    --login-card: rgba(255, 255, 255, 0.78);
    --login-card-border: rgba(255, 255, 255, 0.86);
    --login-text: #102033;
    --login-muted: #5b6b7d;
    --login-subtle: #d7e4ef;
    --login-primary: #0f766e;
    --login-primary-strong: #0d9488;
    --login-blue: #2563eb;
    --login-cyan: #0ea5e9;
    --login-danger: #b42318;
    --login-danger-bg: #fff1f0;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    min-height: 100%;
    margin: 0;
    font-family: "Inter", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    color: var(--login-text);
    background: var(--login-bg);
    overflow-x: hidden;
}

.login-shell {
    position: relative;
    min-height: 100dvh;
    display: grid;
    grid-template-columns: minmax(320px, 1fr) minmax(360px, 520px);
    align-items: center;
    gap: 56px;
    padding: 56px clamp(24px, 6vw, 96px);
    overflow: hidden;
    background:
        radial-gradient(circle at 18% 18%, rgba(14, 165, 233, 0.18), transparent 30%),
        radial-gradient(circle at 82% 72%, rgba(15, 118, 110, 0.2), transparent 32%),
        linear-gradient(135deg, var(--login-bg-strong), var(--login-bg));
}

.login-shell::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.045) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.75), transparent 78%);
    -webkit-mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.75), transparent 78%);
}

.login-visual {
    position: relative;
    z-index: 1;
    min-height: 520px;
}

.login-grid {
    position: absolute;
    inset: 54px 10px 70px 24px;
    border: 1px solid rgba(37, 99, 235, 0.12);
    border-radius: 8px;
    background:
        linear-gradient(rgba(15, 118, 110, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 118, 110, 0.08) 1px, transparent 1px);
    background-size: 34px 34px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.login-orbit {
    position: absolute;
    left: clamp(8px, 4vw, 84px);
    top: 34px;
    width: min(460px, 72vw);
    aspect-ratio: 1;
}

.login-orbit__ring,
.login-orbit__axis,
.login-orbit__scan,
.login-orbit__point {
    position: absolute;
    display: block;
}

.login-orbit__ring {
    inset: 50%;
    border-radius: 50%;
    border: 1px solid rgba(14, 165, 233, 0.26);
    transform: translate(-50%, -50%);
}

.login-orbit__ring--outer {
    width: 100%;
    height: 100%;
}

.login-orbit__ring--middle {
    width: 68%;
    height: 68%;
    border-style: dashed;
    border-color: rgba(15, 118, 110, 0.28);
}

.login-orbit__ring--inner {
    width: 34%;
    height: 34%;
    border-color: rgba(37, 99, 235, 0.24);
}

.login-orbit__axis--x {
    left: 0;
    right: 0;
    top: 50%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.36), transparent);
}

.login-orbit__axis--y {
    top: 0;
    bottom: 0;
    left: 50%;
    width: 1px;
    background: linear-gradient(180deg, transparent, rgba(14, 165, 233, 0.36), transparent);
}

.login-orbit__scan {
    left: 50%;
    top: 50%;
    width: 48%;
    height: 48%;
    transform-origin: 0 0;
    border-radius: 0 100% 0 0;
    background: conic-gradient(from 270deg, rgba(14, 165, 233, 0.22), rgba(14, 165, 233, 0), transparent 42%);
    animation: loginRadarSweep 8s linear infinite;
}

.login-orbit__point {
    width: 9px;
    height: 9px;
    border-radius: 999px;
    background: #0f766e;
    box-shadow: 0 0 0 7px rgba(15, 118, 110, 0.11), 0 0 24px rgba(15, 118, 110, 0.42);
}

.login-orbit__point--a {
    left: 29%;
    top: 25%;
}

.login-orbit__point--b {
    right: 16%;
    top: 43%;
    background: var(--login-blue);
    box-shadow: 0 0 0 7px rgba(37, 99, 235, 0.11), 0 0 24px rgba(37, 99, 235, 0.38);
}

.login-orbit__point--c {
    left: 58%;
    bottom: 14%;
}

.login-signal-panel {
    position: absolute;
    left: 12%;
    bottom: 26px;
    width: min(320px, 76vw);
    padding: 18px;
    border: 1px solid rgba(255, 255, 255, 0.82);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.66);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: 0 24px 70px rgba(16, 32, 51, 0.14);
}

.login-signal-panel__header {
    width: 46%;
    height: 12px;
    border-radius: 999px;
    background: #123047;
}

.login-signal-panel__rows {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.login-signal-panel__rows span {
    display: block;
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(15, 118, 110, 0.72), rgba(14, 165, 233, 0.16));
}

.login-signal-panel__rows span:nth-child(2) {
    width: 78%;
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.56), rgba(37, 99, 235, 0.1));
}

.login-signal-panel__rows span:nth-child(3) {
    width: 56%;
}

.login-card {
    position: relative;
    z-index: 2;
    width: min(520px, 100%);
    padding: 36px;
    border: 1px solid var(--login-card-border);
    border-radius: 8px;
    background: var(--login-card);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    box-shadow: 0 30px 80px rgba(16, 32, 51, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.login-card__header {
    display: flex;
    align-items: center;
    margin-bottom: 36px;
}

.login-brand {
    display: flex;
    align-items: center;
    gap: 15px;
    min-width: 0;
}

.login-brand img {
    width: 58px;
    height: 58px;
    border-radius: 8px;
    background: #081a36;
    object-fit: contain;
    box-shadow: 0 20px 38px rgba(8, 26, 54, 0.18), 0 0 0 1px rgba(14, 165, 233, 0.18);
}

.login-brand strong {
    display: block;
    color: #071426;
    font-size: 28px;
    line-height: 1.05;
    font-weight: 800;
}

.login-brand span {
    display: block;
    margin-top: 6px;
    color: var(--login-muted);
    font-size: 14px;
    font-weight: 700;
}

.login-card__intro h1 {
    margin: 0;
    color: var(--login-text);
    font-size: 34px;
    line-height: 1.18;
}

.login-form {
    margin-top: 28px;
}

.login-field {
    margin-top: 18px;
}

.login-field label {
    display: block;
    color: #1b2d42;
    font-size: 14px;
    font-weight: 700;
}

.login-field input {
    width: 100%;
    max-width: 100%;
    margin-top: 8px;
    padding: 14px 15px;
    border: 1px solid #bfd0df;
    border-radius: 8px;
    color: var(--login-text);
    background: rgba(255, 255, 255, 0.86);
    font: inherit;
    font-size: 16px;
    outline: none;
    transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.login-field input::placeholder {
    color: #7b8794;
}

.login-field input:focus {
    border-color: var(--login-primary-strong);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.16);
}

.login-submit {
    width: 100%;
    max-width: 100%;
    min-height: 52px;
    margin-top: 28px;
    border: 0;
    border-radius: 8px;
    color: #fff;
    background: linear-gradient(135deg, var(--login-primary), var(--login-primary-strong));
    font: inherit;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 18px 38px rgba(15, 118, 110, 0.28);
    transition: box-shadow 160ms ease, background 160ms ease;
}

.login-submit:hover {
    background: linear-gradient(135deg, #0b6f68, #0f9f94);
    box-shadow: 0 22px 46px rgba(15, 118, 110, 0.34);
}

.login-submit:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.4);
    outline-offset: 3px;
}

.login-error {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-top: 18px;
    padding: 12px 14px;
    border: 1px solid #ffcdc7;
    border-radius: 8px;
    color: var(--login-danger);
    background: var(--login-danger-bg);
    font-size: 14px;
    line-height: 1.5;
}

.login-error__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 20px;
    height: 20px;
    border-radius: 999px;
    color: #fff;
    background: var(--login-danger);
    font-size: 13px;
    font-weight: 800;
}

@keyframes loginRadarSweep {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 900px) {
    .login-shell {
        grid-template-columns: 1fr;
        gap: 28px;
        padding: 32px 20px;
    }

    .login-visual {
        min-height: 250px;
        order: 1;
    }

    .login-card {
        order: 2;
        justify-self: center;
    }

    .login-orbit {
        left: 50%;
        top: -12px;
        width: min(360px, 86vw);
        transform: translateX(-50%);
    }

    .login-signal-panel {
        left: 50%;
        bottom: 4px;
        transform: translateX(-50%);
    }
}

@media (max-width: 760px) {
    .login-shell {
        display: block;
        min-height: 100dvh;
        padding: 18px 14px;
        overflow-x: hidden;
    }

    .login-shell::before,
    .login-visual {
        display: none;
    }

    .login-card {
        width: auto;
        max-width: none;
        margin: 0;
        padding: 26px 20px;
    }

    .login-field input,
    .login-submit {
        display: block;
        width: 100%;
        max-width: 320px;
        min-width: 0;
    }

    .login-card__header {
        display: block;
        margin-bottom: 26px;
    }

    .login-card__intro h1 {
        font-size: 30px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

    .login-orbit__scan {
        animation: none;
    }
}