/* ==================== 后台登录界面（独立样式，覆盖 style.css 中的旧版） ====================
   引入位置必须在 style.css 之后。品牌色沿用站点主色 #1b4f8a / #2a6fb0。
   ================================================================================== */

/* 整页：柔和渐变底 + 两处品牌色光晕，让卡片浮起来 */
.admin-login {
    min-height: 100vh;
    width: 100%;
    display: grid;
    place-items: center;
    padding: 48px 20px;
    box-sizing: border-box;
    background:
        radial-gradient(900px 420px at 18% 8%, rgba(42, 111, 176, .10), transparent 60%),
        radial-gradient(760px 400px at 88% 92%, rgba(27, 79, 138, .09), transparent 62%),
        linear-gradient(165deg, #f5f8fc 0%, #eaf1f8 100%);
}

.admin-login-card {
    position: relative;
    width: 396px;
    max-width: 100%;
    box-sizing: border-box;
    background: #fff;
    border: 1px solid #e6ecf5;
    border-radius: 18px;
    padding: 40px 36px 26px;
    text-align: center;
    box-shadow: 0 18px 48px rgba(15, 23, 42, .10), 0 2px 8px rgba(15, 23, 42, .04);
    overflow: hidden;
}

/* 顶部品牌色细条 */
.admin-login-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, #1b4f8a, #2a6fb0 55%, #4d97d6);
}

.admin-login-logo {
    width: 56px; height: 56px;
    margin: 0 auto 16px;
    border-radius: 16px;
    background: linear-gradient(135deg, #1b4f8a, #2a6fb0);
    color: #fff;
    font-size: 24px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 22px rgba(27, 79, 138, .30);
    letter-spacing: 1px;
}

.admin-login-card h2 {
    font-size: 20px;
    margin: 0 0 6px;
    color: #0f172a;
    font-weight: 600;
    letter-spacing: .5px;
}

.admin-login-desc {
    font-size: 13px;
    color: #94a3b8;
    margin: 0 0 26px;
}

.admin-login-card .form-row {
    text-align: left;
    margin-bottom: 18px;
}

.admin-login-card .form-row label {
    display: block;
    font-size: 13px;
    color: #475569;
    margin-bottom: 7px;
    font-weight: 500;
}

/* 输入框：左侧图标 + 右侧密码可见切换 */
.ai-field { position: relative; }

.ai-ico {
    position: absolute;
    left: 13px; top: 50%;
    transform: translateY(-50%);
    width: 17px; height: 17px;
    color: #94a3b8;
    pointer-events: none;
    transition: color .15s;
}

.admin-login-card .form-row input {
    width: 100%;
    height: 44px;
    padding: 0 13px 0 40px;
    box-sizing: border-box;
    border: 1px solid #dde5ef;
    border-radius: 10px;
    font-size: 14px;
    color: #0f172a;
    background: #fbfcfe;
    transition: border-color .15s, box-shadow .15s, background .15s;
}

.admin-login-card .form-row input::placeholder { color: #b3bfcd; }

.admin-login-card .form-row input:hover { border-color: #c7d4e3; }

.admin-login-card .form-row input:focus {
    outline: none;
    background: #fff;
    border-color: #2a6fb0;
    box-shadow: 0 0 0 3px rgba(42, 111, 176, .13);
}

.admin-login-card .form-row input:focus + .ai-ico,
.admin-login-card .form-row input:focus ~ .ai-ico { color: #2a6fb0; }

/* 密码可见切换按钮 */
.ai-eye {
    position: absolute;
    right: 8px; top: 50%;
    transform: translateY(-50%);
    width: 30px; height: 30px;
    display: flex; align-items: center; justify-content: center;
    border: none; background: transparent;
    border-radius: 7px;
    color: #94a3b8;
    cursor: pointer;
    padding: 0;
    transition: color .15s, background .15s;
}
.ai-eye:hover { color: #475569; background: #f1f5f9; }
.ai-eye svg { width: 17px; height: 17px; }
.ai-eye .eye-off { display: none; }
.ai-eye.on .eye-open { display: none; }
.ai-eye.on .eye-off { display: block; }

.admin-login-card .form-err {
    min-height: 18px;
    margin-bottom: 10px;
    font-size: 12.5px;
    color: #dc2626;
    text-align: left;
}

.admin-login-card .btn-primary,
.admin-login-card .admin-login-submit {
    position: relative;
    display: flex;               /* 改 block-ish 让 width:100% 真正占满 */
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;                 /* 几乎全宽（参考图样式） */
    height: 50px;
    margin: 8px 0 0;
    padding: 0 24px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    background: #2563eb;          /* 亮蓝色实心，参考图色 */
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 3px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
    transition: background-color .18s ease, transform .14s ease, box-shadow .18s ease;
    overflow: hidden;
}

/* 不再需要 flex 居中（按钮已 width:100%），保留只是为了不影响其他可能用 .btn-primary 的元素 */
.admin-login-card #admin-login-form {
    display: flex;
    flex-direction: column;
}

/* 隐藏箭头，跟参考图保持一致（参考图是纯文字按钮，没有右侧 →） */
.admin-login-card .admin-login-submit .als-arrow {
    display: none;
}
.admin-login-card .admin-login-submit .als-arrow { display: none; }
.admin-login-card .btn-primary .als-arrow,
.admin-login-card .admin-login-submit .als-arrow {
    display: none;
}
.admin-login-card .admin-login-submit .als-label {
    display: inline-block;
}
.admin-login-card .btn-primary:hover,
.admin-login-card .admin-login-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 9px 22px rgba(27, 79, 138, .34);
}
.admin-login-card .btn-primary:hover .als-arrow,
.admin-login-card .admin-login-submit:hover .als-arrow {
    transform: translateX(4px);
}
.admin-login-card .btn-primary:active,
.admin-login-card .admin-login-submit:active {
    transform: translateY(0);
    box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
}
.admin-login-card .btn-primary:hover,
.admin-login-card .admin-login-submit:hover {
    background: #1d4fd8;          /* hover 时颜色加深，参考图常见样式 */
}
.admin-login-card .btn-primary:disabled,
.admin-login-card .admin-login-submit:disabled {
    cursor: progress;
    background: #93b6fb;
}

/* 加载圈：默认值 opacity:0，添加 .is-loading 后淡入并旋转 */
.admin-login-card .admin-login-submit .als-spin {
    position: absolute;
    right: 18px;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, .35);
    border-top-color: #fff;
    border-radius: 50%;
    opacity: 0;
    transition: opacity .18s ease;
}
.admin-login-card .admin-login-submit.is-loading .als-label,
.admin-login-card .admin-login-submit.is-loading .als-arrow {
    opacity: 0;
    transform: translateX(-6px);
}
.admin-login-card .admin-login-submit.is-loading .als-spin {
    opacity: 1;
    animation: als-spin 0.8s linear infinite;
}
.admin-login-card .admin-login-submit.is-loading {
    pointer-events: none;
}
@keyframes als-spin {
    to { transform: rotate(360deg); }
}

/* 底部：品牌署名（原「默认账号 admin/admin888」提示已移除，避免泄露默认口令） */
.admin-login-foot {
    margin-top: 22px;
    padding-top: 16px;
    border-top: 1px solid #f1f5f9;
    font-size: 12px;
    color: #a8b4c4;
    line-height: 1.7;
}

/* 兜底：即便 HTML 里残留旧提示也不显示 */
.admin-login-tip { display: none !important; }

@media (max-width: 480px) {
    .admin-login { padding: 28px 16px; align-items: flex-start; }
    .admin-login-card { padding: 32px 22px 22px; border-radius: 16px; }
}