/**
 * 管理后台登录页 — 大气 · 分栏品牌区 + 玻璃表单
 */

:root {
    --login-bg-deep: #030712;
    --login-accent: #22d3ee;
    --login-accent-2: #818cf8;
    --login-text-dim: rgba(255, 255, 255, 0.72);
    --login-card-bg: rgba(255, 255, 255, 0.78);
    --login-card-border: rgba(255, 255, 255, 0.55);
    --login-input-border: rgba(15, 23, 42, 0.12);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body.login-body {
    min-height: 100vh;
    font-family: "Microsoft YaHei", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
    -webkit-font-smoothing: antialiased;
    color: #0f172a;
    overflow-x: hidden;
}

.login-page {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 背景层：深色渐变 + 光晕 + 细网格 */
.login-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    background: var(--login-bg-deep);
    overflow: hidden;
}

.login-bg__mesh {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 120% 80% at 20% 20%, rgba(34, 211, 238, 0.18) 0%, transparent 50%),
        radial-gradient(ellipse 100% 60% at 80% 70%, rgba(129, 140, 248, 0.22) 0%, transparent 55%),
        radial-gradient(ellipse 80% 50% at 50% 100%, rgba(15, 23, 42, 0.9) 0%, transparent 60%),
        linear-gradient(165deg, #0c1222 0%, #030712 45%, #0a1628 100%);
}

.login-bg__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 90% 70% at 50% 40%, black 20%, transparent 75%);
    pointer-events: none;
}

.login-bg__orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.55;
    pointer-events: none;
    animation: loginOrbFloat 18s ease-in-out infinite;
}

.login-bg__orb--1 {
    width: min(520px, 90vw);
    height: min(520px, 90vw);
    top: -12%;
    right: -8%;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.45) 0%, transparent 70%);
}

.login-bg__orb--2 {
    width: min(420px, 80vw);
    height: min(420px, 80vw);
    bottom: -15%;
    left: -5%;
    background: radial-gradient(circle, rgba(129, 140, 248, 0.4) 0%, transparent 70%);
    animation-delay: -7s;
}

@keyframes loginOrbFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(-20px, 24px) scale(1.05);
    }
}

/* 主布局：左侧品牌 + 右侧表单 */
.login-main {
    position: relative;
    z-index: 1;
    flex: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
    min-height: 100vh;
    align-items: stretch;
}

.login-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(2rem, 5vw, 4rem) clamp(1.5rem, 4vw, 4rem);
    color: #fff;
}

.login-hero__inner {
    max-width: 36rem;
    animation: loginFadeUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes loginFadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.45em;
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--login-accent);
    margin-bottom: 1.25rem;
    font-weight: 600;
    padding: 0.35em 0.85em;
    border-radius: 999px;
    background: rgba(34, 211, 238, 0.1);
    border: 1px solid rgba(34, 211, 238, 0.2);
}

.login-eyebrow i {
    font-size: 0.85em;
}

.login-logo-mark {
    width: 4.5rem;
    height: 4.5rem;
    border-radius: 1.25rem;
    background: linear-gradient(145deg, rgba(34, 211, 238, 0.35) 0%, rgba(129, 140, 248, 0.25) 100%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.75rem;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.08) inset,
        0 20px 50px rgba(0, 0, 0, 0.35);
}

.login-logo-mark i {
    font-size: 2rem;
    color: #fff;
    filter: drop-shadow(0 4px 12px rgba(34, 211, 238, 0.4));
}

.login-hero h1 {
    font-size: clamp(1.65rem, 3.2vw, 2.35rem);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    text-shadow: 0 2px 40px rgba(0, 0, 0, 0.35);
}

.login-lead {
    font-size: clamp(0.95rem, 1.5vw, 1.125rem);
    color: var(--login-text-dim);
    line-height: 1.65;
    margin-bottom: 2rem;
    max-width: 32rem;
}

.login-version-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: rgba(255, 255, 255, 0.7);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 6px;
    padding: 0.2em 0.7em;
    margin-bottom: 1rem;
    margin-top: -0.5rem;
}

.login-features {
    list-style: none;
    display: grid;
    gap: 0.85rem;
}

.login-features li {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.88);
}

.login-features li i {
    width: 2rem;
    height: 2rem;
    border-radius: 0.5rem;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--login-accent);
    font-size: 0.85rem;
    flex-shrink: 0;
}

/* 右侧表单区 */
.login-aside {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(1.5rem, 4vw, 3rem);
    background: linear-gradient(90deg, transparent 0%, rgba(3, 7, 18, 0.35) 100%);
}

.login-card {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    padding: clamp(2rem, 4vw, 2.75rem);
    border-radius: 1.5rem;
    background: var(--login-card-bg);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid var(--login-card-border);
    box-shadow:
        0 4px 6px rgba(0, 0, 0, 0.04),
        0 24px 48px rgba(0, 0, 0, 0.18),
        0 0 0 1px rgba(255, 255, 255, 0.4) inset;
    animation: loginCardIn 0.65s cubic-bezier(0.22, 1, 0.36, 1) 0.12s backwards;
}

@keyframes loginCardIn {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.login-card__head {
    margin-bottom: 1.75rem;
}

.login-card__head h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #0f172a;
    letter-spacing: -0.02em;
    margin-bottom: 0.35rem;
}

.login-card__head p {
    font-size: 0.875rem;
    color: #64748b;
}

.login-body .form-group {
    margin-bottom: 1.35rem;
}

.login-body label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #334155;
    margin-bottom: 0.5rem;
}

.login-body .input-wrap {
    position: relative;
}

.login-body .input-wrap .input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
    z-index: 2;
    pointer-events: none;
}

.login-body .form-control {
    display: block;
    width: 100%;
    height: 3.125rem;
    padding-left: 2.85rem;
    border: 1px solid var(--login-input-border);
    border-radius: 0.75rem;
    font-size: 0.9375rem;
    background: rgba(255, 255, 255, 0.95);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.login-body .form-control:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
    outline: none;
}

.login-body .form-control::placeholder {
    color: #94a3b8;
}

.btn-login {
    width: 100%;
    height: 3.125rem;
    margin-top: 0.25rem;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #4f46e5 0%, #6366f1 40%, #0ea5e9 100%);
    background-size: 200% 200%;
    box-shadow:
        0 4px 14px rgba(79, 70, 229, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-position 0.35s ease;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow:
        0 12px 28px rgba(79, 70, 229, 0.45),
        0 0 0 1px rgba(255, 255, 255, 0.15) inset;
    background-position: 100% 50%;
}

.btn-login:active {
    transform: translateY(0);
}

.login-body .alert {
    border-radius: 0.75rem;
    border: none;
    padding: 0.85rem 1rem;
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
}

.login-body .alert-danger {
    background: linear-gradient(135deg, #fef2f2 0%, #fff1f2 100%);
    color: #b91c1c;
    border: 1px solid #fecaca;
}

.login-copy {
    text-align: center;
    margin-top: 2rem;
    padding: 0 0.5rem;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.45);
    line-height: 1.6;
}

.login-copy strong {
    color: rgba(255, 255, 255, 0.65);
    font-weight: 500;
}

/* 数据流动装饰线 */
.login-dataline {
    display: flex;
    gap: 6px;
    margin-top: 2.5rem;
    height: 3px;
    max-width: 12rem;
}

.login-dataline span {
    flex: 1;
    border-radius: 3px;
    background: rgba(34, 211, 238, 0.25);
    position: relative;
    overflow: hidden;
}

.login-dataline span::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, var(--login-accent), transparent);
    animation: loginDataPulse 2.8s ease-in-out infinite;
    opacity: 0;
}

.login-dataline span:nth-child(2)::after { animation-delay: 0.3s; }
.login-dataline span:nth-child(3)::after { animation-delay: 0.6s; }
.login-dataline span:nth-child(4)::after { animation-delay: 0.9s; }
.login-dataline span:nth-child(5)::after { animation-delay: 1.2s; }

@keyframes loginDataPulse {
    0%, 100% { opacity: 0; transform: scaleX(0.3); }
    50%      { opacity: 1; transform: scaleX(1); }
}

/* 安全连接提示 */
.login-secure-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0.75rem 1rem;
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    font-size: 0.72rem;
    color: #94a3b8;
    letter-spacing: 0.03em;
}

.login-secure-note i {
    color: #22c55e;
    font-size: 0.8rem;
}

/* 平板及以下：品牌在上、表单在下 */
@media (max-width: 991.98px) {
    .login-main {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .login-hero {
        padding-bottom: 1rem;
        text-align: center;
    }

    .login-hero__inner {
        max-width: 100%;
    }

    .login-logo-mark {
        margin-left: auto;
        margin-right: auto;
    }

    .login-lead {
        margin-left: auto;
        margin-right: auto;
    }

    .login-features {
        max-width: 20rem;
        margin: 0 auto;
        text-align: left;
    }

    .login-aside {
        background: transparent;
        padding-top: 0;
        padding-bottom: 2.5rem;
    }
}

@media (max-width: 575.98px) {
    .login-card {
        padding: 1.5rem 1.25rem;
        border-radius: 1.25rem;
    }

    .login-bg__orb {
        animation: none;
        opacity: 0.4;
    }
}

@media (prefers-reduced-motion: reduce) {
    .login-bg__orb,
    .login-hero__inner,
    .login-card {
        animation: none !important;
    }

    .btn-login {
        transition: none;
    }
}