/* ============================================================
   全站自定义UI组件样式（Modal模态弹窗 + Toast轻提示）
   纯CSS实现，零外部框架依赖
   配色变量可被后台(admin.css)/前台(style.css)覆盖以统一风格
   ============================================================ */
:root {
    --ui-primary: #3D6B99;
    --ui-primary-hover: #527EA9;
    --ui-accent: #E8A94C;
    --ui-danger: #D45D5D;
    --ui-danger-hover: #C04B4B;
    --ui-success: #1E9E5A;
    --ui-warning: #E8910C;
    --ui-info: #3D6B99;
    --ui-text: #2B3445;
    --ui-text-light: #6B7688;
    --ui-bg: #FFFFFF;
    --ui-border: #E3E8F0;
    --ui-radius: 10px;
    --ui-shadow: 0 12px 40px rgba(15, 30, 60, .18);
    --ui-overlay: rgba(15, 25, 45, .48);
    --ui-font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* -------------------- Toast 轻提示 -------------------- */
.ui-toast-wrap {
    position: fixed;
    top: 22px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100000;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    pointer-events: none;
    max-width: calc(100vw - 32px);
}
.ui-toast {
    display: flex;
    align-items: center;
    gap: 9px;
    min-width: 220px;
    max-width: 92vw;
    padding: 11px 18px;
    background: var(--ui-bg);
    color: var(--ui-text);
    font-family: var(--ui-font);
    font-size: 14px;
    line-height: 1.5;
    border-radius: 8px;
    border-left: 4px solid var(--ui-info);
    box-shadow: 0 6px 24px rgba(15, 30, 60, .16);
    pointer-events: auto;
    opacity: 0;
    transform: translateY(-14px);
    transition: opacity .28s ease, transform .28s ease;
    word-break: break-all;
}
.ui-toast.ui-show { opacity: 1; transform: translateY(0); }
.ui-toast.ui-hide { opacity: 0; transform: translateY(-10px); }
.ui-toast .ui-toast-ico {
    flex: 0 0 auto;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    font-style: normal;
}
.ui-toast-success { border-left-color: var(--ui-success); }
.ui-toast-success .ui-toast-ico { background: var(--ui-success); }
.ui-toast-error { border-left-color: var(--ui-danger); }
.ui-toast-error .ui-toast-ico { background: var(--ui-danger); }
.ui-toast-warning { border-left-color: var(--ui-warning); }
.ui-toast-warning .ui-toast-ico { background: var(--ui-warning); }
.ui-toast-info { border-left-color: var(--ui-info); }
.ui-toast-info .ui-toast-ico { background: var(--ui-info); }

/* -------------------- Modal 模态弹窗 -------------------- */
.ui-modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--ui-overlay);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity .25s ease;
    overflow-y: auto;
}
.ui-modal-overlay.ui-show { opacity: 1; }
.ui-modal {
    background: var(--ui-bg);
    border-radius: var(--ui-radius);
    box-shadow: var(--ui-shadow);
    width: 440px;
    max-width: 100%;
    max-height: calc(100vh - 60px);
    display: flex;
    flex-direction: column;
    font-family: var(--ui-font);
    transform: translateY(-18px) scale(.98);
    transition: transform .25s ease;
    margin: auto;
}
.ui-modal-overlay.ui-show .ui-modal { transform: translateY(0) scale(1); }
.ui-modal-lg { width: 860px; }
.ui-modal-md { width: 560px; }

.ui-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 14px;
    border-bottom: 1px solid var(--ui-border);
}
.ui-modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--ui-primary);
    margin: 0;
}
.ui-modal-close {
    border: none;
    background: transparent;
    cursor: pointer;
    width: 30px;
    height: 30px;
    border-radius: 6px;
    color: var(--ui-text-light);
    font-size: 18px;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background .15s ease, color .15s ease;
}
.ui-modal-close:hover { background: #F0F3F8; color: var(--ui-text); }

.ui-modal-body {
    padding: 18px 20px;
    font-size: 14px;
    line-height: 1.7;
    color: var(--ui-text);
    overflow-y: auto;
    word-break: break-word;
}
.ui-modal-body p { margin: 0 0 8px; }
.ui-modal-body p:last-child { margin-bottom: 0; }

.ui-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 14px 20px 16px;
    border-top: 1px solid var(--ui-border);
}
.ui-btn {
    appearance: none;
    border: 1px solid var(--ui-border);
    background: #fff;
    color: var(--ui-text);
    font-family: var(--ui-font);
    font-size: 14px;
    padding: 8px 20px;
    border-radius: 7px;
    cursor: pointer;
    transition: background .15s ease, border-color .15s ease, color .15s ease;
    line-height: 1.4;
}
.ui-btn:hover { border-color: #C4CEDD; background: #F6F8FB; }
.ui-btn-primary {
    background: var(--ui-primary);
    border-color: var(--ui-primary);
    color: #fff;
}
.ui-btn-primary:hover { background: var(--ui-primary-hover); border-color: var(--ui-primary-hover); }
.ui-btn-danger {
    background: var(--ui-danger);
    border-color: var(--ui-danger);
    color: #fff;
}
.ui-btn-danger:hover { background: var(--ui-danger-hover); border-color: var(--ui-danger-hover); }
.ui-btn-accent {
    background: var(--ui-accent);
    border-color: var(--ui-accent);
    color: #fff;
}
.ui-btn-accent:hover { filter: brightness(1.06); background: var(--ui-accent); border-color: var(--ui-accent); }

/* AI对比弹窗双栏 */
.ui-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
.ui-compare-col h5 {
    margin: 0 0 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--ui-text-light);
    padding: 6px 10px;
    background: #F2F5FA;
    border-radius: 6px;
}
.ui-compare-col .ui-compare-box {
    border: 1px solid var(--ui-border);
    border-radius: 8px;
    padding: 12px;
    min-height: 220px;
    max-height: 46vh;
    overflow-y: auto;
    font-size: 13.5px;
    line-height: 1.8;
    background: #FDFDFE;
}
.ui-compare-col.is-new .ui-compare-box { background: #F4FBF7; border-color: #CBE8D8; }

@media (max-width: 640px) {
    .ui-modal { width: 100%; }
    .ui-compare { grid-template-columns: 1fr; }
    .ui-toast { min-width: 0; width: calc(100vw - 40px); }
    .ui-modal-footer { flex-wrap: wrap; }
    .ui-modal-footer .ui-btn { flex: 1; }
}