/* ============================================================
   晨马文化 · 登录页样式（设计画布风）
   作用域：.cm-login  —— 不影响其他页面
   浅底细线网格 + 靛蓝几何点缀 + 居中白卡
   气质对标 Figma / 设计工具后台
   零外网字体依赖，适配国内部署
   ============================================================ */

.cm-login {
    /* —— Design Tokens —— */
    --cm-ink: #0e0f1e;
    --cm-ink-2: #3a3d5a;
    --cm-muted: #8b8fa8;
    --cm-line: #e7e8f0;
    --cm-grid: #e4e7f5;
    --cm-surface: #ffffff;
    --cm-accent: #5b5fb1;
    --cm-accent-2: #7b7fd0;
    --cm-cyan: #49e5db;

    --cm-font-cn: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
    --cm-font-disp: "SF Pro Display", "Segoe UI", system-ui, var(--cm-font-cn);

    margin: 0;
    padding: 0;
    min-height: 100vh;
    color: var(--cm-ink);
    font-family: var(--cm-font-cn);
    font-size: 15px;
    line-height: 1.6;
    background: #f7f8fc;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

.cm-login *,
.cm-login *::before,
.cm-login *::after { box-sizing: border-box; }

.cm-login body { margin: 0; }

/* ============================================================
   画布背景（固定铺满）—— 细线网格
   ============================================================ */
.cm-login .cm-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    background:
        linear-gradient(180deg, #f8f9fd 0%, #eef0fa 100%);
    /* 视差偏移由 JS 更新的变量驱动（默认 0px），反向轻微平移 */
    --cm-px: 0px;
    --cm-py: 0px;
}

/* 主网格：细线，像设计稿画布 —— 反向视差，幅度较大 */
.cm-login .cm-canvas::before {
    content: "";
    position: absolute;
    inset: -40px; /* 留出平移余量，避免边缘露白 */
    background-image:
        linear-gradient(var(--cm-grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--cm-grid) 1px, transparent 1px);
    background-size: 40px 40px;
    -webkit-mask-image: radial-gradient(90% 90% at 50% 45%, #000 30%, transparent 100%);
    mask-image: radial-gradient(90% 90% at 50% 45%, #000 30%, transparent 100%);
    opacity: .7;
    transform: translate(calc(var(--cm-px) * -1.6), calc(var(--cm-py) * -1.6));
    transition: transform .6s cubic-bezier(.22, 1, .36, 1);
}

/* 副网格：更细更密的小格，仅在中心隐约可见 —— 反向视差，幅度较小（近大远小） */
.cm-login .cm-canvas::after {
    content: "";
    position: absolute;
    inset: -40px;
    background-image:
        linear-gradient(rgba(91, 95, 177, .05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(91, 95, 177, .05) 1px, transparent 1px);
    background-size: 8px 8px;
    -webkit-mask-image: radial-gradient(40% 40% at 50% 48%, #000 0%, transparent 100%);
    mask-image: radial-gradient(40% 40% at 50% 48%, #000 0%, transparent 100%);
    transform: translate(calc(var(--cm-px) * -0.7), calc(var(--cm-py) * -0.7));
    transition: transform .6s cubic-bezier(.22, 1, .36, 1);
}

/* ============================================================
   网格视差 —— 鼠标移动时背景网格反向轻微平移，产生纵深感
   ============================================================ */

/* ============================================================
   主容器 —— 内容层，居中
   ============================================================ */
.cm-login .cm-stage {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
}

/* ============================================================
   顶部品牌徽标
   ============================================================ */
.cm-login .cm-topbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    opacity: 0;
    animation: cm-fade-up .6s cubic-bezier(.22, 1, .36, 1) .05s forwards;
}

.cm-login .cm-mark {
    width: 36px;
    height: 36px;
    border-radius: 11px;
    background: linear-gradient(140deg, var(--cm-accent), var(--cm-accent-2));
    display: grid;
    place-items: center;
    color: #fff;
    box-shadow: 0 6px 16px rgba(91, 95, 177, .3);
}

.cm-login .cm-brand-name {
    font-family: var(--cm-font-disp);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: .01em;
    color: var(--cm-ink);
}

.cm-login .cm-brand-name small {
    display: block;
    font-size: 10.5px;
    font-weight: 400;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--cm-muted);
    margin-top: 1px;
}

/* ============================================================
   登录卡 —— 实心白卡 + 精细描边
   ============================================================ */
.cm-login .cm-card {
    position: relative;
    width: 100%;
    max-width: 340px;
    text-align: center;
    padding: 36px 34px 34px;
    border-radius: 18px;
    background: var(--cm-surface);
    border: 1px solid var(--cm-line);
    box-shadow:
        0 1px 2px rgba(14, 15, 30, .04),
        0 18px 48px rgba(91, 95, 177, .12),
        0 4px 12px rgba(14, 15, 30, .04);
    opacity: 0;
    animation: cm-rise .8s cubic-bezier(.22, 1, .36, 1) .15s forwards;
}

/* 卡片左上角的设计稿式角标 */
.cm-login .cm-card::before {
    content: "";
    position: absolute;
    left: 18px;
    top: 18px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--cm-accent);
    opacity: .35;
}

.cm-login .cm-card-eyebrow {
    font-family: var(--cm-font-disp);
    font-size: 11.5px;
    font-weight: 500;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--cm-accent);
    margin-bottom: 12px;
}

.cm-login .cm-card-title {
    font-family: var(--cm-font-disp);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -.02em;
    color: var(--cm-ink);
    margin: 0 0 8px;
}

.cm-login .cm-card-sub {
    font-size: 13.5px;
    color: var(--cm-muted);
    margin: 0 0 22px;
}

/* 二维码容器 —— 紧凑细边框，贴近微信官方扫码框 */
.cm-login .cm-qr-wrap {
    position: relative;
    display: inline-block;
    padding: 8px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid var(--cm-line);
    line-height: 0; /* 消除 iframe 下方基线间隙 */
    transition: box-shadow .35s ease;
}

.cm-login .cm-qr-wrap:hover {
    box-shadow: 0 10px 24px rgba(91, 95, 177, .14);
}

.cm-login .cm-qr-wrap iframe {
    display: block;
    border: 0;
    /* 微信官方默认 iframe 300×400，等比缩放收紧 */
    width: 200px;
    height: 280px;
}

/* 二维码下方说明 */
.cm-login .cm-card-note {
    margin: 18px 0 0;
    font-size: 12.5px;
    color: var(--cm-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.cm-login .cm-card-note svg {
    flex-shrink: 0;
    color: var(--cm-accent);
}

/* ============================================================
   底部 footer 局部覆盖（浅底适配）
   ============================================================ */
.cm-login .footer {
    position: relative;
    z-index: 1;
    margin-top: 36px;
    text-align: center;
    opacity: 0;
    animation: cm-fade-up .6s cubic-bezier(.22, 1, .36, 1) .35s forwards;
}

.cm-login .footer,
.cm-login .footer a { color: var(--cm-muted); }
.cm-login .footer a:hover { color: var(--cm-accent); }

/* ============================================================
   动画
   ============================================================ */
@keyframes cm-rise {
    from { opacity: 0; transform: translateY(18px) scale(.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes cm-fade-up {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 640px) {
    .cm-login .cm-card { padding: 36px 24px 32px; }
    .cm-login .cm-card-title { font-size: 22px; }
}

/* ============================================================
   无障碍：尊重用户的动效偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    .cm-login .cm-card,
    .cm-login .cm-topbar,
    .cm-login .footer {
        animation: none !important;
        opacity: 1 !important;
    }
    /* 关闭登录卡 3D 倾斜，避免视觉晃动 */
    .cm-login .cm-card { transform: none !important; }
    /* 关闭网格视差，避免视觉晃动 */
    .cm-login .cm-canvas::before,
    .cm-login .cm-canvas::after {
        transform: none !important;
        transition: none !important;
    }
}