/**
 * 登录页专用样式（与 nykb-brand 主色 #14C5CD 一致）
 */
.nykb-login-page {
    margin: 0;
    min-height: 100vh;
    position: relative;
    font-family: "Source Sans 3", system-ui, -apple-system, sans-serif;
    color: #1a2b3c;
    -webkit-font-smoothing: antialiased;
}

.nykb-login-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    background: radial-gradient(ellipse 100% 80% at 0% 0%, rgba(20, 197, 205, 0.35), transparent 55%),
    radial-gradient(ellipse 70% 60% at 100% 20%, rgba(45, 120, 160, 0.25), transparent 50%),
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(20, 197, 205, 0.12), transparent 45%),
    linear-gradient(160deg, #071422 0%, #0c2238 38%, #0a1a2e 100%);
    overflow: hidden;
}

.nykb-login-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48'%3E%3Ccircle cx='2' cy='2' r='1' fill='rgba(255,255,255,0.06)'/%3E%3C/svg%3E");
    background-size: 48px 48px;
    opacity: 0.9;
}

.nykb-login-bg::after {
    content: "";
    position: absolute;
    width: 140%;
    height: 60%;
    left: -20%;
    bottom: -15%;
    background: linear-gradient(
            105deg,
            transparent 0%,
            rgba(20, 197, 205, 0.07) 40%,
            rgba(20, 197, 205, 0.03) 70%,
            transparent 100%
    );
    border-radius: 50%;
    pointer-events: none;
}

@media (prefers-reduced-motion: no-preference) {
    .nykb-login-bg {
        animation: nykb-login-bg-shift 18s ease-in-out infinite alternate;
    }
}

@keyframes nykb-login-bg-shift {
    0% {
        filter: hue-rotate(0deg) saturate(1);
    }
    100% {
        filter: hue-rotate(-8deg) saturate(1.08);
    }
}

.nykb-login-shell {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

@media (min-width: 992px) {
    .nykb-login-shell {
        flex-direction: row;
        align-items: stretch;
    }
}

/* 左侧品牌区 */
.nykb-login-hero {
    flex: 1;
    min-height: 0;
    padding: clamp(2rem, 5vw, 4rem);
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 100%;
    position: relative;
}

@media (min-width: 992px) {
    .nykb-login-hero {
        flex: 1.05;
        max-width: 52%;
    }
}

.nykb-login-hero-inner {
    max-width: 28rem;
    margin: 0 auto;
}

.nykb-login-mark {
    width: 4rem;
    height: 4rem;
    border-radius: 1rem;
    background: linear-gradient(145deg, rgba(20, 197, 205, 0.35), rgba(20, 197, 205, 0.08));
    border: 1px solid rgba(255, 255, 255, 0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: #7ee8ee;
    margin-bottom: 1.75rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.nykb-login-hero h1 {
    font-size: clamp(1.85rem, 4vw, 2.35rem);
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin: 0 0 0.75rem;
}

.nykb-login-hero .nykb-login-lead {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.72);
    line-height: 1.55;
    margin: 0 0 2rem;
}

.nykb-login-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.nykb-login-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.95rem;
}

.nykb-login-features .bi {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    background: rgba(20, 197, 205, 0.2);
    color: #9ef0f5;
    font-size: 1rem;
}

/* 表单主栏 */
.nykb-login-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: clamp(1.25rem, 4vw, 2.5rem);
    min-height: 0;
}

.nykb-login-mobile-head {
    width: 100%;
    max-width: 420px;
    text-align: center;
    margin-bottom: 1.25rem;
    color: #fff;
}

.nykb-login-mobile-head .nykb-login-mark {
    margin: 0 auto 0.75rem;
    width: 3rem;
    height: 3rem;
    font-size: 1.35rem;
}

.nykb-login-mobile-head h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: #fff;
}

.nykb-login-mobile-head p {
    margin: 0.35rem 0 0;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.65);
}

.nykb-login-card {
    width: 100%;
    max-width: 420px;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 1.25rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.04),
    0 24px 48px rgba(7, 20, 34, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.08) inset;
    overflow: hidden;
}

.nykb-login-card-header {
    padding: 1.75rem 1.75rem 0.5rem;
    text-align: center;
}

.nykb-login-card-header .nykb-login-welcome {
    font-size: 1.35rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
    letter-spacing: -0.02em;
}

.nykb-login-card-header .nykb-login-sub {
    margin: 0.35rem 0 0;
    font-size: 0.875rem;
    color: #64748b;
}

.nykb-login-card-body {
    padding: 1.25rem 1.75rem 1.75rem;
}

.nykb-login-card-body .alert {
    border-radius: 0.65rem;
    font-size: 0.875rem;
}

/* 输入框组 */
.nykb-login-input .form-floating > label {
    color: #64748b;
}

.nykb-login-input .form-control {
    border-color: #e2e8f0;
    min-height: calc(3.25rem + 2px);
}

.nykb-login-input .form-control:focus {
    border-color: #14c5cd;
    box-shadow: 0 0 0 0.2rem rgba(20, 197, 205, 0.2);
}

.nykb-login-input.has-validation {
    flex-wrap: wrap;
}

.nykb-login-input .input-group-text {
    background: #f8fafc;
    border-color: #e2e8f0;
    color: #14c5cd;
    font-size: 1.1rem;
    border-top-right-radius: 0.5rem;
    border-bottom-right-radius: 0.5rem;
}

.nykb-login-input .form-floating .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.nykb-login-card .btn-primary {
    font-weight: 600;
    padding-top: 0.6rem;
    padding-bottom: 0.6rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 14px rgba(20, 197, 205, 0.35);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.nykb-login-card .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(20, 197, 205, 0.4);
}

@media (prefers-reduced-motion: reduce) {
    .nykb-login-bg {
        animation: none;
    }

    .nykb-login-card .btn-primary:hover {
        transform: none;
    }
}

.nykb-login-card .form-check-label {
    color: #475569;
    font-size: 0.9rem;
}

.nykb-login-card #linkForgotPassword {
    color: #64748b;
    text-decoration: none;
    font-weight: 500;
}

.nykb-login-card #linkForgotPassword:hover {
    color: #14c5cd;
}

.nykb-login-foot {
    text-align: center;
    padding: 0 1rem 1.25rem;
    font-size: 0.75rem;
    color: #94a3b8;
}