/* ==========================================================================
   Yicool 邮箱 /tools/mail  ——  样式表
   视觉参考：QQ 邮箱（wx.mail.qq.com）电脑版
     顶栏（搜索 + 账号） / 左侧文件夹 / 中间邮件列表 / 右侧阅读窗格
   布局：
     ≥1024px   三栏：侧栏 220px + 列表 380px + 阅读铺满，整屏高度、各栏内部滚动
     768-1023  侧栏收成 64px 图标栏（.open 浮出 240px），列表 + 阅读两栏
     <768px    单栏：侧栏为左侧抽屉（.open + .mail-mask），阅读区铺满全屏
   颜色：全部走 #mailApp 上的 --ml-* 变量；深色只需覆盖变量。
        弹窗 / 写信窗口 / Toast 在 #mailApp 之外，故变量同时在
        body.page-mail-full 上定义一份以便继承。
   ========================================================================== */

/* ==========================================================================
   0. 整屏布局：解除全站 .app / .main-content 的宽度限制
   ========================================================================== */
body.page-mail-full {
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}
body.page-mail-full .app {
    max-width: 100%;
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    overflow: hidden;
}
body.page-mail-full .main-content {
    max-width: 100%;
    width: 100%;
    border-right: 0;
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    overflow: hidden;
    padding: 0;
}

/* ==========================================================================
   1. 变量（浅色默认）
   ========================================================================== */
#mailApp,
body.page-mail-full {
    --ml-bg: #f4f6f9;              /* 应用底色 */
    --ml-bg-elev: #ffffff;         /* 面板 / 卡片 */
    --ml-bg-hover: #eef1f6;        /* 悬停底 */
    --ml-bg-active: #e8f0fe;       /* 选中邮件底 */
    --ml-border: #e4e7ec;          /* 常规描边 */
    --ml-border-strong: #cdd3dc;   /* 强调描边 / 复选框框 */
    --ml-text: #1f2329;            /* 主文字 */
    --ml-text-dim: #626a76;        /* 次要文字 */
    --ml-text-mute: #99a1ad;       /* 弱化文字 / 占位符 */
    --ml-accent: #1a8cff;          /* 主色（QQ 邮箱蓝，JS 会覆盖） */
    --ml-accent-soft: color-mix(in srgb, var(--ml-accent) 12%, transparent);
    --ml-danger: #d3382c;
    --ml-danger-soft: rgba(211, 56, 44, .10);
    --ml-star: #f4b400;
    --ml-shadow: 0 8px 28px rgba(15, 23, 42, .12);
    --ml-shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
    --ml-radius: 10px;
    --ml-top-h: 52px;
    color-scheme: light;
}

/* 主色变化时派生的柔和色（JS 只写 --ml-accent，这里兜底） */
#mailApp { --ml-accent-soft: color-mix(in srgb, var(--ml-accent) 11%, transparent); }
body.page-mail-full { --ml-accent-soft: color-mix(in srgb, var(--ml-accent) 11%, transparent); }

/* ==========================================================================
   2. 基础与通用
   ========================================================================== */
.mail-app,
#mailApp {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
    background: var(--ml-bg);
    color: var(--ml-text);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    scrollbar-width: thin;
    scrollbar-color: color-mix(in srgb, var(--ml-text-mute) 45%, transparent) transparent;
}
#mailApp *,
.mail-compose *,
.mail-modal *,
.mail-menu *,
.mail-gate * { box-sizing: border-box; }

#mailApp ::-webkit-scrollbar,
.mail-modal-body::-webkit-scrollbar,
.mail-compose-body::-webkit-scrollbar { width: 8px; height: 8px; }
#mailApp ::-webkit-scrollbar-track,
.mail-modal-body::-webkit-scrollbar-track,
.mail-compose-body::-webkit-scrollbar-track { background: transparent; }
#mailApp ::-webkit-scrollbar-thumb,
.mail-modal-body::-webkit-scrollbar-thumb,
.mail-compose-body::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--ml-text-mute) 38%, transparent);
    border-radius: 8px;
}
#mailApp ::-webkit-scrollbar-thumb:hover { background: color-mix(in srgb, var(--ml-text-mute) 60%, transparent); }

/* hidden 兜底（写信窗口 / 弹窗 / 菜单 / 引导层在 #mailApp 之外，需单独列出） */
#mailApp [hidden],
.mail-compose[hidden],
.mail-modal[hidden],
.mail-modal-mask[hidden],
.mail-menu[hidden],
.mail-gate[hidden],
.mail-mask[hidden] { display: none !important; }

#mailApp :focus-visible,
.mail-compose :focus-visible,
.mail-modal :focus-visible {
    outline: 2px solid var(--ml-accent);
    outline-offset: 1px;
    border-radius: 6px;
}

/* 通用图标按钮 */
.mail-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    flex: 0 0 auto;
    padding: 0;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--ml-text-dim);
    font-size: 15px;
    line-height: 1;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.mail-icon-btn:hover { background: var(--ml-bg-hover); color: var(--ml-text); }
.mail-icon-btn:active { background: color-mix(in srgb, var(--ml-text) 10%, transparent); }
.mail-icon-btn.danger:hover { color: var(--ml-danger); background: var(--ml-danger-soft); }
.mail-icon-btn.on,
.mail-icon-btn[aria-pressed="true"] { color: var(--ml-accent); background: var(--ml-accent-soft); }
#mailReadStar.on { color: var(--ml-star); background: color-mix(in srgb, var(--ml-star) 16%, transparent); }

/* 通用按钮 */
.mail-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 32px;
    padding: 0 14px;
    border: 1px solid var(--ml-border);
    border-radius: 8px;
    background: var(--ml-bg-elev);
    color: var(--ml-text);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition: background .15s, border-color .15s, color .15s, filter .15s;
}
.mail-btn:hover { background: var(--ml-bg-hover); border-color: var(--ml-border-strong); }
.mail-btn.primary { background: var(--ml-accent); border-color: var(--ml-accent); color: #fff; height: 34px; padding: 0 22px; border-radius: 9px; box-shadow: 0 4px 14px -5px color-mix(in srgb, var(--ml-accent) 60%, transparent); }
.mail-btn.primary:hover { filter: brightness(.94); background: var(--ml-accent); }
.mail-btn.ghost { background: transparent; border-color: transparent; color: var(--ml-text-dim); }
.mail-btn.ghost:hover { background: var(--ml-bg-hover); color: var(--ml-text); border-color: transparent; }
.mail-btn.danger { color: var(--ml-danger); border-color: color-mix(in srgb, var(--ml-danger) 35%, transparent); }
.mail-btn.danger:hover { background: var(--ml-danger-soft); border-color: var(--ml-danger); }
.mail-btn:disabled,
.mail-btn[disabled] { opacity: .5; cursor: not-allowed; filter: none; }

/* ==========================================================================
   3. 顶栏
   ========================================================================== */
.mail-top {
    flex: 0 0 var(--ml-top-h);
    height: var(--ml-top-h);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 12px;
    background: var(--ml-bg-elev);
    border-bottom: 1px solid var(--ml-border);
    z-index: 5;
}
.mail-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    flex: 0 0 auto;
}
.mail-brand-ic { font-size: 20px; line-height: 1; }
.mail-brand-txt {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: .01em;
    white-space: nowrap;
    color: var(--ml-text);
}

/* 抽屉按钮：仅窄屏出现 */
.mail-drawer-btn { display: none; }

/* 搜索 */
.mail-search {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 560px;
    height: 34px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 6px 0 10px;
    background: var(--ml-bg);
    border: 1px solid transparent;
    border-radius: 999px;
    transition: background .15s, border-color .15s, box-shadow .15s;
}
.mail-search:focus-within {
    background: var(--ml-bg-elev);
    border-color: var(--ml-accent);
    box-shadow: 0 0 0 3px var(--ml-accent-soft);
}
.mail-search-ic { flex: 0 0 auto; color: var(--ml-text-mute); }
.mail-search-input {
    flex: 1 1 auto;
    min-width: 0;
    height: 100%;
    border: 0;
    background: none;
    outline: none;
    font-family: inherit;
    font-size: 13.5px;
    color: var(--ml-text);
}
.mail-search-input::placeholder { color: var(--ml-text-mute); }
.mail-search-scope {
    flex: 0 0 auto;
    height: 24px;
    max-width: 92px;
    padding: 0 2px;
    border: 0;
    border-left: 1px solid var(--ml-border);
    background: none;
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 12.5px;
    cursor: pointer;
    outline: none;
}
.mail-search-clear {
    flex: 0 0 auto;
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 50%;
    background: var(--ml-border);
    color: var(--ml-text-dim);
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
}
.mail-search-clear:hover { background: var(--ml-border-strong); color: var(--ml-text); }

.mail-top-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 0 0 auto;
}
.mail-me {
    max-width: 190px;
    padding: 0 4px;
    font-size: 12.5px;
    color: var(--ml-text-dim);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ==========================================================================
   4. 主体三栏
   ========================================================================== */
.mail-main {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
}
/* 写信（集成窗口）：隐藏列表与阅读，显示写信面板（各断点共用） */
.mail-main.composing .mail-list-pane,
.mail-main.composing .mail-read { display: none !important; }
.mail-main.composing .mail-compose { display: flex; }
/* 通讯录（集成窗口）：隐藏列表/阅读/写信，显示通讯录面板（各断点共用） */
.mail-main.contacts .mail-list-pane,
.mail-main.contacts .mail-read,
.mail-main.contacts .mail-compose { display: none !important; }
.mail-main.contacts .mail-contacts { display: flex; }
@media (min-width: 1024px) {
    .mail-main {
        display: grid;
        /* 默认（收件箱）：文件夹 + 列表撑满，整屏无留白 */
        grid-template-columns: 220px minmax(0, 1fr);
    }
    /* 阅读邮件时：文件夹 + 列表(固定 380) + 阅读铺满 */
    #mailApp.reading .mail-main {
        grid-template-columns: 220px minmax(340px, 380px) minmax(0, 1fr);
    }
    /* 写信（集成窗口）：列表/阅读隐藏，写信面板占据主区 */
    .mail-main.composing {
        grid-template-columns: 220px minmax(0, 1fr);
    }
    /* 通讯录（集成窗口）：与主区同宽 */
    .mail-main.contacts {
        grid-template-columns: 220px minmax(0, 1fr);
    }
}

/* ==========================================================================
   5. 左侧：文件夹
   ========================================================================== */
.mail-side {
    width: 220px;
    flex: 0 0 220px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: var(--ml-bg-elev);
    border-right: 1px solid var(--ml-border);
    overflow-y: auto;
    overflow-x: hidden;
}
@media (min-width: 1024px) {
    .mail-side { width: 100%; flex: none; }
}

/* 写信按钮（QQ 邮箱风格大号胶囊按钮） */
.mail-compose-btn {
    flex: 0 0 auto;
    height: 40px;
    margin: 12px 12px 10px;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: 0;
    border-radius: 20px;
    background: var(--ml-accent);
    color: #fff;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 12px color-mix(in srgb, var(--ml-accent) 30%, transparent);
    transition: filter .15s, box-shadow .15s;
}
.mail-compose-btn:hover { filter: brightness(.94); }
.mail-compose-btn:active { filter: brightness(.88); box-shadow: none; }

/* 文件夹列表 */
.mail-folders {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 0 8px;
    min-height: 0;
}
.mail-folder {
    width: 100%;
    height: 34px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 10px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--ml-text);
    font-family: inherit;
    font-size: 13.5px;
    text-align: left;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.mail-folder:hover { background: var(--ml-bg-hover); }
.mail-folder.on {
    background: var(--ml-accent-soft);
    color: var(--ml-accent);
    font-weight: 600;
}
.mail-folder-ic {
    flex: 0 0 18px;
    width: 18px;
    font-size: 14px;
    text-align: center;
    line-height: 1;
}
.mail-folder-name {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-folder-count {
    flex: 0 0 auto;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: var(--ml-danger);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
}
.mail-folder-count:empty,
.mail-folder-count[hidden] { display: none; }
.mail-folder.on .mail-folder-count { background: var(--ml-accent); }

/* 侧栏分区 */
.mail-side-sec { padding: 0 8px; margin-top: 12px; }
.mail-side-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    padding: 6px 10px 4px;
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: .04em;
    color: var(--ml-text-mute);
}
.mail-mini-btn {
    width: 22px;
    height: 22px;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 1px solid var(--ml-border);
    border-radius: 6px;
    background: var(--ml-bg-elev);
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
}
.mail-mini-btn:hover { background: var(--ml-bg-hover); color: var(--ml-accent); border-color: var(--ml-accent); }

.mail-side-link {
    width: 100%;
    height: 32px;
    display: flex;
    align-items: center;
    padding: 0 10px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--ml-text);
    font-family: inherit;
    font-size: 13px;
    text-align: left;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.mail-side-link:hover { background: var(--ml-bg-hover); color: var(--ml-accent); }

.mail-side-foot {
    margin-top: auto;
    padding: 14px 14px 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.mail-quota {
    font-size: 11.5px;
    line-height: 1.6;
    color: var(--ml-text-mute);
    word-break: break-all;
}
.mail-quota-bar {
    height: 4px;
    margin-top: 4px;
    border-radius: 999px;
    background: var(--ml-bg-hover);
    overflow: hidden;
}
.mail-quota-bar > i,
.mail-quota-bar > span {
    display: block;
    height: 100%;
    border-radius: 999px;
    background: var(--ml-accent);
}
.mail-tip {
    font-size: 11px;
    line-height: 1.9;
    color: var(--ml-text-mute);
}
.mail-tip b {
    display: inline-block;
    min-width: 16px;
    padding: 0 4px;
    margin: 0 1px;
    border-radius: 4px;
    background: var(--ml-bg-hover);
    color: var(--ml-text-dim);
    font-size: 10.5px;
    font-weight: 700;
    text-align: center;
}

/* ==========================================================================
   6. 中间：邮件列表
   ========================================================================== */
.mail-list-pane {
    flex: 1 1 auto;
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    background: var(--ml-bg-elev);
    border-right: 1px solid var(--ml-border);
}
.mail-list-head {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px 14px 10px;
    border-bottom: 1px solid var(--ml-border);
}
.mail-list-title {
    margin: 0;
    font-size: 17px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--ml-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-filters { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.mail-chip {
    height: 26px;
    padding: 0 12px;
    border: 1px solid var(--ml-border);
    border-radius: 999px;
    background: transparent;
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 12.5px;
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
}
.mail-chip:hover { background: var(--ml-bg-hover); color: var(--ml-text); }
.mail-chip.on {
    background: var(--ml-accent-soft);
    border-color: color-mix(in srgb, var(--ml-accent) 45%, transparent);
    color: var(--ml-accent);
    font-weight: 600;
}
.mail-list-tools { display: flex; align-items: center; gap: 6px; }
.mail-list-count {
    margin-right: auto;
    font-size: 12px;
    color: var(--ml-text-mute);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 批量操作条 */
.mail-bulkbar {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background: var(--ml-accent-soft);
    border-bottom: 1px solid var(--ml-border);
    flex-wrap: wrap;
}
.mail-txt-btn {
    padding: 4px 7px;
    border: 0;
    border-radius: 6px;
    background: none;
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 12.5px;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.mail-txt-btn:hover { background: var(--ml-bg-elev); color: var(--ml-accent); }
.mail-txt-btn.danger { color: var(--ml-danger); }
.mail-txt-btn.danger:hover { background: var(--ml-danger-soft); color: var(--ml-danger); }
.mail-sel-count {
    margin-left: auto;
    font-size: 12px;
    color: var(--ml-text-dim);
    white-space: nowrap;
}

/* 自定义复选框：input 隐藏 + span 画方框 / 对勾 */
.mail-check {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    flex: 0 0 auto;
    cursor: pointer;
    user-select: none;
}
.mail-check input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
    margin: 0;
}
.mail-check > span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    color: var(--ml-text-dim);
    white-space: nowrap;
}
.mail-check > span::before {
    content: "";
    flex: 0 0 15px;
    width: 15px;
    height: 15px;
    border: 1.5px solid var(--ml-border-strong);
    border-radius: 4px;
    background: var(--ml-bg-elev) no-repeat center / 12px 12px;
    transition: background-color .15s, border-color .15s;
}
.mail-check:hover > span::before { border-color: var(--ml-accent); }
.mail-check input:checked + span::before,
.mail-check input:indeterminate + span::before {
    border-color: var(--ml-accent);
    background-color: var(--ml-accent);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23fff' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.4l3.2 3.2L13 4.8'/%3E%3C/svg%3E");
}
.mail-check input:indeterminate + span::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%23fff' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M4 8h8'/%3E%3C/svg%3E");
}
.mail-check input:focus-visible + span::before {
    outline: 2px solid var(--ml-accent);
    outline-offset: 2px;
}

/* 列表 */
.mail-list {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
}
.mail-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 9px 14px 9px 12px;
    border-bottom: 1px solid var(--ml-border);
    cursor: pointer;
    transition: background .12s;
}
.mail-item:hover { background: var(--ml-bg-hover); }
.mail-item.active { background: var(--ml-bg-active); }
.mail-item.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--ml-accent);
}
.mail-item.active:hover { background: var(--ml-bg-active); }
.mail-item .mail-check { padding-top: 2px; }

.mail-star {
    flex: 0 0 auto;
    margin-top: 1px;
    padding: 1px 2px;
    border: 0;
    background: none;
    color: var(--ml-border-strong);
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    transition: color .15s, transform .1s;
}
.mail-star:hover { color: var(--ml-star); transform: scale(1.12); }
.mail-star.on { color: var(--ml-star); }

.mail-item-main { flex: 1 1 auto; min-width: 0; }
.mail-item-top { display: flex; align-items: baseline; gap: 8px; }
.mail-item-from {
    flex: 1 1 auto;
    min-width: 0;
    font-size: 13.5px;
    color: var(--ml-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-item-time {
    flex: 0 0 auto;
    font-size: 11.5px;
    color: var(--ml-text-mute);
}
.mail-item-subject {
    margin-top: 2px;
    font-size: 13.5px;
    color: var(--ml-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-item-snippet {
    margin-top: 2px;
    font-size: 12.5px;
    color: var(--ml-text-mute);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-item-attach {
    flex: 0 0 auto;
    margin-top: 2px;
    font-size: 12px;
    opacity: .65;
}
/* 未读：加粗 + 主题色圆点 */
.mail-item.unread .mail-item-from,
.mail-item.unread .mail-item-subject { font-weight: 700; }
.mail-item.unread .mail-item-from::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-right: 6px;
    border-radius: 50%;
    background: var(--ml-accent);
    vertical-align: middle;
}
.mail-item.unread .mail-item-time { color: var(--ml-accent); font-weight: 600; }

/* 草稿：复刻 QQ 邮箱，列表项标注「草稿」且整行可点击进入编辑 */
.mail-item.is-draft { background: color-mix(in srgb, var(--ml-accent) 6%, var(--ml-bg)); }
.mail-item.is-draft:hover { background: color-mix(in srgb, var(--ml-accent) 11%, var(--ml-bg)); }
.mail-item-draft {
    display: inline-block;
    margin-right: 6px;
    padding: 0 6px;
    font-size: 11px;
    line-height: 18px;
    border-radius: 4px;
    color: var(--ml-accent);
    background: color-mix(in srgb, var(--ml-accent) 14%, transparent);
    border: 1px solid color-mix(in srgb, var(--ml-accent) 35%, transparent);
    vertical-align: middle;
}
/* 草稿列表项「一键发送」快捷按钮（QQ 邮箱式蓝胶囊，悬停填充） */
.mail-item-send {
    flex: 0 0 auto;
    margin-left: 4px;
    height: 22px;
    padding: 0 10px;
    border: 1px solid color-mix(in srgb, var(--ml-accent) 45%, transparent);
    border-radius: 999px;
    background: color-mix(in srgb, var(--ml-accent) 10%, transparent);
    color: var(--ml-accent);
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
}
.mail-item-send:hover { background: var(--ml-accent); color: #fff; border-color: var(--ml-accent); }
.mail-item-send:active { filter: brightness(.92); }

/* 紧凑密度 */
.mail-list.compact .mail-item,
.mail-item.dense { padding: 6px 14px 6px 12px; }
.mail-list.compact .mail-item-subject,
.mail-item.dense .mail-item-subject { font-size: 13px; margin-top: 1px; }
.mail-list.compact .mail-item-snippet,
.mail-item.dense .mail-item-snippet { display: none; }
.mail-list.compact .mail-item-from,
.mail-item.dense .mail-item-from { font-size: 13px; }

/* 空态 / 底部 */
.mail-list-foot {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 10px 0 16px;
}
.mail-more-btn {
    height: 30px;
    padding: 0 18px;
    border: 1px solid var(--ml-border);
    border-radius: 999px;
    background: var(--ml-bg-elev);
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 12.5px;
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
}
.mail-more-btn:hover { background: var(--ml-bg-hover); color: var(--ml-accent); border-color: var(--ml-accent); }
.mail-empty {
    padding: 44px 20px 32px;
    text-align: center;
    color: var(--ml-text-mute);
}
.mail-empty-ic { font-size: 44px; line-height: 1; opacity: .85; margin-bottom: 10px; }
.mail-empty p { margin: 0; font-size: 13.5px; }

/* ==========================================================================
   7. 右侧：阅读窗格
   ========================================================================== */
.mail-read {
    flex: 1 1 auto;
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    background: var(--ml-bg-elev);
}
.mail-read-head {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-bottom: 1px solid var(--ml-border);
}
.mail-read-subject {
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--ml-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-read-acts { flex: 0 0 auto; display: flex; align-items: center; gap: 2px; }
.mail-read-back { display: none; }

.mail-read-meta {
    flex: 0 0 auto;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 18px;
    border-bottom: 1px solid var(--ml-border);
}
.mail-avatar {
    flex: 0 0 38px;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--ml-accent);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    overflow: hidden;
    user-select: none;
}
.mail-avatar img { width: 100%; height: 100%; object-fit: cover; }
.mail-read-meta-main { flex: 1 1 auto; min-width: 0; }
.mail-read-row {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    font-size: 13px;
    color: var(--ml-text);
}
.mail-read-row + .mail-read-row { margin-top: 3px; }
.mail-read-row.sub { font-size: 12.5px; color: var(--ml-text-dim); }
.mail-read-from {
    min-width: 0;
    font-size: 13.5px;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-read-time {
    margin-left: auto;
    flex: 0 0 auto;
    font-size: 12px;
    color: var(--ml-text-mute);
    white-space: nowrap;
}
.mail-read-label { flex: 0 0 auto; color: var(--ml-text-mute); }
.mail-read-row.sub > span:not(.mail-read-label) {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 正文 */
.mail-read-body {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 18px 22px 26px;
    font-size: 14.5px;
    line-height: 1.75;
    color: var(--ml-text);
    word-wrap: break-word;
}
.mail-read-body > :first-child { margin-top: 0; }
.mail-read-body p { margin: 0 0 12px; max-width: 62em; }
.mail-read-body h1,
.mail-read-body h2,
.mail-read-body h3,
.mail-read-body h4 { margin: 18px 0 10px; line-height: 1.4; font-weight: 700; }
.mail-read-body h1 { font-size: 20px; }
.mail-read-body h2 { font-size: 18px; }
.mail-read-body h3 { font-size: 16px; }
.mail-read-body a { color: var(--ml-accent); text-decoration: underline; text-underline-offset: 2px; }
.mail-read-body ul,
.mail-read-body ol { margin: 0 0 12px; padding-left: 24px; max-width: 62em; }
.mail-read-body li { margin: 3px 0; }
.mail-read-body blockquote {
    margin: 0 0 12px;
    padding: 6px 0 6px 14px;
    border-left: 3px solid var(--ml-border-strong);
    color: var(--ml-text-dim);
    max-width: 62em;
}
.mail-read-body img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 6px 0;
}
.mail-read-body pre {
    margin: 0 0 12px;
    padding: 12px 14px;
    border-radius: 8px;
    background: var(--ml-bg);
    border: 1px solid var(--ml-border);
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.6;
}
.mail-read-body code {
    padding: 1px 5px;
    border-radius: 4px;
    background: var(--ml-bg-hover);
    font-size: .9em;
}
.mail-read-body pre code { padding: 0; background: none; }
.mail-read-body table {
    max-width: 100%;
    border-collapse: collapse;
    margin: 0 0 12px;
    font-size: 13.5px;
}
.mail-read-body th,
.mail-read-body td {
    padding: 6px 10px;
    border: 1px solid var(--ml-border);
}
.mail-read-body hr {
    margin: 16px 0;
    border: 0;
    border-top: 1px solid var(--ml-border);
}

/* 附件 */
.mail-attachs {
    flex: 0 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0 22px 14px;
}
.mail-attach {
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: 300px;
    padding: 8px 10px;
    border: 1px solid var(--ml-border);
    border-radius: var(--ml-radius);
    background: var(--ml-bg);
    transition: border-color .15s, background .15s;
}
.mail-attach:hover { border-color: var(--ml-accent); background: var(--ml-bg-elev); }
.mail-attach > span:first-child { font-size: 18px; line-height: 1; }
.mail-attach-ic { flex: 0 0 auto; font-size: 18px; line-height: 1; }
.mail-attach-info { flex: 1 1 auto; min-width: 0; }
.mail-attach-name {
    flex: 1 1 auto;
    min-width: 0;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-attach-size {
    flex: 0 0 auto;
    font-size: 11.5px;
    color: var(--ml-text-mute);
}
.mail-attach-dl {
    flex: 0 0 auto;
    padding: 3px 6px;
    border: 0;
    border-radius: 6px;
    background: none;
    color: var(--ml-accent);
    font-family: inherit;
    font-size: 12.5px;
    text-decoration: none;
    cursor: pointer;
}
.mail-attach-dl:hover { background: var(--ml-accent-soft); }

/* 底部操作 + 快速回复 */
.mail-read-foot {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    padding: 10px 18px;
    border-top: 1px solid var(--ml-border);
}
.mail-quick {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px 18px calc(12px + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--ml-border);
    background: var(--ml-bg);
}
.mail-quick-input {
    width: 100%;
    min-height: 48px;
    max-height: 160px;
    padding: 9px 12px;
    border: 1px solid var(--ml-border);
    border-radius: var(--ml-radius);
    background: var(--ml-bg-elev);
    color: var(--ml-text);
    font-family: inherit;
    font-size: 13.5px;
    line-height: 1.6;
    resize: vertical;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}
.mail-quick-input:focus {
    border-color: var(--ml-accent);
    box-shadow: 0 0 0 3px var(--ml-accent-soft);
}
.mail-quick-input::placeholder { color: var(--ml-text-mute); }
.mail-quick-acts { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }

/* ==========================================================================
   8. 写信窗口
   ========================================================================== */
.mail-compose {
    display: none;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    height: 100%;
    background: var(--ml-bg);
    overflow: hidden;
}
/* 通讯录（集成窗口）：与写信面板同构，默认隐藏，contacts 态显示 */
.mail-contacts {
    display: none;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    height: 100%;
    background: var(--ml-bg-elev);
    overflow: hidden;
}
.mail-compose-head {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
    height: 42px;
    padding: 0 8px 0 14px;
    background: color-mix(in srgb, var(--ml-accent) 5%, var(--ml-bg-elev));
    border-bottom: 1px solid var(--ml-border);
    user-select: none;
}
.mail-compose-title {
    flex: 1 1 auto;
    min-width: 0;
    font-size: 13.5px;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-compose-head-acts { flex: 0 0 auto; display: flex; align-items: center; gap: 2px; }
.mail-compose-back {
    flex: 0 0 auto;
    height: 30px;
    padding: 0 10px;
    display: inline-flex;
    align-items: center;
    gap: 2px;
    border: 1px solid var(--ml-border);
    border-radius: 7px;
    background: var(--ml-bg);
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 13px;
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
}
.mail-compose-back:hover { background: var(--ml-accent-soft); color: var(--ml-accent); border-color: var(--ml-accent); }

.mail-compose-body {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    margin: 10px 12px 12px;
    padding: 6px 16px 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--ml-bg-elev);
    border: 1px solid var(--ml-border);
    border-radius: 12px;
    box-shadow: 0 10px 30px -18px rgba(0, 0, 0, .25);
}
.mail-field {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 2px 0;
    border-bottom: 1px solid var(--ml-border);
}
.mail-field:focus-within { border-bottom-color: var(--ml-accent); }
.mail-field-label {
    flex: 0 0 56px;
    width: 56px;
    font-size: 13px;
    color: var(--ml-text-dim);
    white-space: nowrap;
}
.mail-field-input {
    flex: 1 1 auto;
    min-width: 0;
    height: 32px;
    border: 0;
    background: none;
    outline: none;
    color: var(--ml-text);
    font-family: inherit;
    font-size: 13.5px;
}
.mail-field-input::placeholder { color: var(--ml-text-mute); }

/* 编辑器工具条 */
.mail-editor-bar {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 3px;
    flex-wrap: wrap;
    padding: 6px;
    background: var(--ml-bg);
    border: 1px solid var(--ml-border);
    border-radius: 10px;
}
.mail-ed-btn {
    height: 28px;
    min-width: 28px;
    padding: 0 7px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: 6px;
    background: none;
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.mail-ed-btn:hover { background: var(--ml-bg-hover); color: var(--ml-text); }
.mail-ed-btn:active { background: var(--ml-accent-soft); color: var(--ml-accent); }
.mail-ed-sel {
    height: 28px;
    padding: 0 4px;
    border: 1px solid var(--ml-border);
    border-radius: 6px;
    background: var(--ml-bg-elev);
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 12.5px;
    cursor: pointer;
    outline: none;
}
.mail-ed-sel:hover { border-color: var(--ml-accent); color: var(--ml-accent); }
.mail-ed-sep {
    width: 1px;
    height: 18px;
    margin: 0 4px;
    background: var(--ml-border);
    flex: 0 0 auto;
}
/* 颜色按钮：「A」+ 下方色条 */
.mail-ed-color {
    position: relative;
    height: 28px;
    padding: 0 7px 9px;
    align-items: flex-start;
    font-weight: 800;
    font-size: 14px;
}
.mail-ed-color input[type="color"] {
    position: absolute;
    left: 6px;
    right: 6px;
    bottom: 3px;
    width: auto;
    height: 4px;
    padding: 0;
    border: 0;
    border-radius: 2px;
    background: none;
    cursor: pointer;
}
.mail-ed-color input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.mail-ed-color input[type="color"]::-webkit-color-swatch { border: 0; border-radius: 2px; }
.mail-ed-color input[type="color"]::-moz-color-swatch { border: 0; border-radius: 2px; }

/* 编辑区 */
.mail-editor {
    flex: 1 1 auto;
    min-height: 180px;
    max-height: none;
    overflow-y: auto;
    padding: 12px;
    border: 1px solid var(--ml-border);
    border-radius: 10px;
    background: var(--ml-bg);
    font-size: 14px;
    line-height: 1.75;
    color: var(--ml-text);
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}
.mail-editor:focus {
    border-color: var(--ml-accent);
    box-shadow: 0 0 0 3px var(--ml-accent-soft);
}
.mail-editor:empty::before {
    content: "写点什么…";
    color: var(--ml-text-mute);
    pointer-events: none;
}
.mail-editor p { margin: 0 0 8px; }
.mail-editor ul,
.mail-editor ol { margin: 0 0 8px; padding-left: 24px; }
.mail-editor a { color: var(--ml-accent); }
.mail-editor img { max-width: 100%; height: auto; border-radius: 6px; }
.mail-editor blockquote {
    margin: 0 0 8px;
    padding-left: 12px;
    border-left: 3px solid var(--ml-border-strong);
    color: var(--ml-text-dim);
}

/* 附件列表 */
.mail-attach-list {
    flex: 0 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 4px 0;
}
.mail-attach-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    max-width: 240px;
    padding: 4px 8px;
    border: 1px solid var(--ml-border);
    border-radius: 999px;
    background: var(--ml-bg);
    font-size: 12.5px;
    color: var(--ml-text-dim);
}
.mail-attach-item > span,
.mail-attach-item > b {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-attach-item button,
.mail-attach-remove {
    flex: 0 0 auto;
    padding: 0 2px;
    border: 0;
    background: none;
    color: var(--ml-text-mute);
    font-family: inherit;
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
}
.mail-attach-item button:hover,
.mail-attach-remove:hover { color: var(--ml-danger); }

.mail-compose-foot {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    padding-top: 6px;
}
.mail-check.mail-inline { font-size: 13px; }
.mail-check.mail-inline > span { font-size: 13px; color: var(--ml-text-dim); }
.mail-compose-foot .mail-check.mail-inline { margin-left: auto; }
.mail-compose-tip {
    margin-left: auto;
    font-size: 12px;
    color: var(--ml-text-mute);
    text-align: right;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ==========================================================================
   9. 弹窗 / 表单 / 通讯录 / 设置
   ========================================================================== */
.mail-modal-mask {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, .45);
    backdrop-filter: blur(2px);
    z-index: 1300;
}
.mail-modal {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 720px;
    max-width: calc(100vw - 32px);
    max-height: calc(100dvh - 64px);
    display: flex;
    flex-direction: column;
    background: var(--ml-bg-elev);
    border: 1px solid var(--ml-border);
    border-radius: 14px;
    box-shadow: var(--ml-shadow);
    overflow: hidden;
    color: var(--ml-text);
    font-size: 14px;
    z-index: 1310;
}
.mail-modal-sm { width: 480px; }
.mail-modal-xs { width: 380px; }
.mail-modal-head {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 12px 12px 18px;
    border-bottom: 1px solid var(--ml-border);
}
.mail-modal-head h3 {
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
    font-size: 15.5px;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-modal-bar {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    padding: 10px 16px;
    border-bottom: 1px solid var(--ml-border);
}
.mail-modal-bar .mail-input { flex: 1 1 180px; width: auto; }
.mail-modal-body {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding: 16px 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.mail-modal-foot {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--ml-border);
    background: var(--ml-bg);
}

/* 表单控件 */
.mail-input {
    width: 100%;
    height: 34px;
    padding: 0 10px;
    border: 1px solid var(--ml-border);
    border-radius: 8px;
    background: var(--ml-bg);
    color: var(--ml-text);
    font-family: inherit;
    font-size: 13.5px;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}
.mail-input:focus {
    border-color: var(--ml-accent);
    box-shadow: 0 0 0 3px var(--ml-accent-soft);
}
.mail-input::placeholder { color: var(--ml-text-mute); }
textarea.mail-input {
    height: auto;
    min-height: 68px;
    padding: 8px 10px;
    line-height: 1.6;
    resize: vertical;
}
.mail-input-sm { width: auto; height: 30px; padding: 0 8px; font-size: 12.5px; }
select.mail-input { cursor: pointer; }

.mail-form-row {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}
.mail-form-row > span {
    flex: 0 0 92px;
    width: 92px;
    font-size: 13px;
    color: var(--ml-text-dim);
}
.mail-form-row.col {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
}
.mail-form-row.col > span { flex: none; width: auto; }

.mail-radios { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.mail-radios label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 13px;
    color: var(--ml-text);
    cursor: pointer;
}
.mail-radios input[type="radio"],
.mail-check input[type="checkbox"],
.mail-modal input[type="checkbox"] { accent-color: var(--ml-accent); }

/* 主题色圆点 */
.mail-swatches { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.mail-swatch {
    width: 24px;
    height: 24px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--c, var(--ml-accent));
    cursor: pointer;
    transition: transform .15s;
}
.mail-swatch:hover { transform: scale(1.12); }
.mail-swatch.on {
    box-shadow: 0 0 0 2px var(--ml-bg-elev), 0 0 0 4px var(--c, var(--ml-accent));
}

/* 设置分区 */
.mail-set-sec {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px 14px;
    border: 1px solid var(--ml-border);
    border-radius: 12px;
    background: var(--ml-bg);
}
.mail-set-sec h4 {
    margin: 0;
    font-size: 13px;
    font-weight: 700;
    color: var(--ml-text-dim);
}

/* 通讯录列表 */
.mail-ct-list { display: flex; flex-direction: column; gap: 6px; }
.mail-ct-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border: 1px solid var(--ml-border);
    border-radius: var(--ml-radius);
    background: var(--ml-bg);
    transition: border-color .15s, background .15s;
}
.mail-ct-item:hover { border-color: var(--ml-border-strong); background: var(--ml-bg-elev); }
.mail-ct-avatar,
.mail-ct-av {
    flex: 0 0 34px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: color-mix(in srgb, var(--ml-accent) 18%, var(--ml-bg-hover));
    color: var(--ml-accent);
    font-size: 13.5px;
    font-weight: 700;
    overflow: hidden;
}
.mail-ct-main,
.mail-ct-info { flex: 1 1 auto; min-width: 0; }
.mail-ct-name {
    font-size: 13.5px;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-ct-email,
.mail-ct-mail {
    font-size: 12px;
    color: var(--ml-text-mute);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.mail-ct-group,
.mail-ct-tag {
    flex: 0 0 auto;
    padding: 1px 8px;
    border-radius: 999px;
    background: var(--ml-bg-hover);
    color: var(--ml-text-dim);
    font-size: 11.5px;
    white-space: nowrap;
}
.mail-ct-star {
    flex: 0 0 auto;
    padding: 2px;
    border: 0;
    background: none;
    color: var(--ml-border-strong);
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
}
.mail-ct-star:hover { color: var(--ml-star); }
.mail-ct-star.on { color: var(--ml-star); }
.mail-ct-acts,
.mail-ct-ops { flex: 0 0 auto; display: flex; align-items: center; gap: 2px; }
.mail-ct-act {
    padding: 3px 7px;
    border: 0;
    border-radius: 6px;
    background: none;
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 12.5px;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.mail-ct-act:hover { background: var(--ml-bg-hover); color: var(--ml-accent); }
.mail-ct-act.danger:hover { background: var(--ml-danger-soft); color: var(--ml-danger); }

/* ==========================================================================
   10. 悬浮菜单 / 遮罩 / 登录引导 / Toast
   ========================================================================== */
.mail-menu {
    position: fixed;
    z-index: 1400;
    min-width: 180px;
    max-width: 260px;
    max-height: 60vh;
    overflow-y: auto;
    padding: 6px;
    background: var(--ml-bg-elev);
    border: 1px solid var(--ml-border);
    border-radius: var(--ml-radius);
    box-shadow: var(--ml-shadow);
}
.mail-menu-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border: 0;
    border-radius: 7px;
    background: none;
    color: var(--ml-text);
    font-family: inherit;
    font-size: 13px;
    text-align: left;
    cursor: pointer;
    transition: background .12s, color .12s;
}
.mail-menu-item:hover { background: var(--ml-bg-hover); color: var(--ml-accent); }
.mail-menu-item.on { background: var(--ml-accent-soft); color: var(--ml-accent); font-weight: 600; }
.mail-menu-item.danger { color: var(--ml-danger); }
.mail-menu-item.danger:hover { background: var(--ml-danger-soft); color: var(--ml-danger); }

/* 窄屏侧栏遮罩：默认不占位，仅窄屏由 JS 控制显隐 */
.mail-mask {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, .42);
    z-index: 900;
}

.mail-gate {
    position: fixed;
    inset: 0;
    z-index: 1500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: color-mix(in srgb, var(--ml-bg) 88%, transparent);
    backdrop-filter: blur(6px);
}
.mail-gate-card {
    width: 100%;
    max-width: 420px;
    padding: 32px 28px 28px;
    background: var(--ml-bg-elev);
    border: 1px solid var(--ml-border);
    border-radius: 16px;
    box-shadow: var(--ml-shadow);
    text-align: center;
}
.mail-gate-ic { font-size: 48px; line-height: 1; }
.mail-gate-card h2 { margin: 10px 0 6px; font-size: 20px; font-weight: 700; }
.mail-gate-card p { margin: 0 0 18px; font-size: 13.5px; color: var(--ml-text-dim); line-height: 1.7; }
.mail-gate-acts { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; }

.mail-toast {
    /* 显式 display 覆盖浏览器 UA 的 [hidden]{display:none}，
       隐藏由 visibility + opacity 负责，JS 只加 .show 也能正常弹出 */
    display: block;
    position: fixed;
    left: 50%;
    bottom: 40px;
    z-index: 2000;
    max-width: min(90vw, 440px);
    padding: 9px 18px;
    border-radius: 999px;
    background: rgba(28, 32, 38, .94);
    color: #fff;
    font-size: 13px;
    line-height: 1.5;
    box-shadow: var(--ml-shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(10px);
    transition: opacity .22s ease, transform .22s ease, visibility .22s;
    pointer-events: none;
}
.mail-toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ==========================================================================
   11. 响应式：平板 768–1023px（侧栏收成图标栏 + 列表 + 阅读）
   ========================================================================== */
@media (min-width: 768px) and (max-width: 1023px) {
    .mail-main {
        position: relative;
        display: grid;
        grid-template-columns: 64px minmax(280px, 40%) minmax(0, 1fr);
    }
    /* 平板写信（集成）：文件夹窄栏 + 写信面板铺满 */
    .mail-main.composing { grid-template-columns: 64px minmax(0, 1fr); }
    /* 平板通讯录（集成）：文件夹窄栏 + 通讯录面板铺满 */
    .mail-main.contacts { grid-template-columns: 64px minmax(0, 1fr); }
    .mail-side {
        width: 64px;
        flex: none;
        overflow: hidden;
    }
    .mail-compose-btn {
        width: 44px;
        height: 44px;
        margin: 12px auto 10px;
        padding: 0;
        border-radius: 50%;
        color: transparent;
        position: relative;
    }
    .mail-compose-btn::before {
        content: "✏️";
        position: absolute;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        color: #fff;
    }
    .mail-folder { height: 40px; padding: 0; justify-content: center; }
    .mail-folder-ic { flex: 0 0 auto; font-size: 16px; }
    .mail-folder-name,
    .mail-folder-count,
    .mail-side-title > span,
    .mail-side-foot { display: none; }
    .mail-side-title { justify-content: center; padding: 8px 0 4px; }
    .mail-side-link { justify-content: center; padding: 0; height: 40px; color: transparent; position: relative; }
    .mail-side-link::before {
        content: "👥";
        position: absolute;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        color: var(--ml-text-dim);
    }
    .mail-side-sec { margin-top: 10px; }

    /* 展开：浮出 240px 面板 */
    .mail-side.open {
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        width: 240px;
        overflow-y: auto;
        box-shadow: var(--ml-shadow);
        z-index: 950;
    }
    .mail-side.open .mail-compose-btn {
        width: auto;
        height: 40px;
        margin: 12px 12px 10px;
        padding: 0 16px;
        border-radius: 20px;
        color: #fff;
        position: static;
    }
    .mail-side.open .mail-compose-btn::before { display: none; }
    .mail-side.open .mail-folder { height: 34px; padding: 0 10px; justify-content: flex-start; }
    .mail-side.open .mail-folder-ic { flex: 0 0 18px; font-size: 14px; }
    .mail-side.open .mail-folder-name { display: block; }
    .mail-side.open .mail-folder-count { display: inline-flex; }
    .mail-side.open .mail-side-title { justify-content: space-between; padding: 6px 10px 4px; }
    .mail-side.open .mail-side-title > span { display: block; }
    .mail-side.open .mail-side-foot { display: flex; }
    .mail-side.open .mail-side-link { justify-content: flex-start; padding: 0 10px; height: 32px; color: var(--ml-text); position: static; }
    .mail-side.open .mail-side-link::before { display: none; }
    .mail-mask { display: block; }
}

/* ==========================================================================
   12. 响应式：手机 <768px（单栏 + 抽屉）
   ========================================================================== */
@media (max-width: 767px) {
    body.page-mail-full { --ml-top-h: 50px; }
    .mail-top { padding: 0 8px; gap: 6px; }
    .mail-brand-txt { display: none; }
    .mail-brand-ic { font-size: 19px; }
    .mail-me { display: none; }
    .mail-drawer-btn { display: inline-flex; }
    .mail-search { max-width: none; height: 32px; }
    .mail-search-scope { display: none; }

    .mail-main { display: block; position: relative; height: 100%; }

    /* 侧栏抽屉 */
    .mail-side {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        width: min(84vw, 280px);
        flex: none;
        z-index: 1000;
        transform: translateX(-102%);
        transition: transform .24s ease;
        box-shadow: var(--ml-shadow);
        overflow-y: auto;
    }
    .mail-side.open { transform: none; }
    .mail-mask { display: block; }

    /* 列表铺满 */
    .mail-list-pane {
        width: 100%;
        height: 100%;
        border-right: 0;
    }
    .mail-list-head { padding: 10px 12px 8px; }
    .mail-item { padding: 10px 12px; }

    /* 阅读区全屏 */
    .mail-read {
        position: fixed;
        inset: 0;
        width: 100%;
        height: 100%;
        z-index: 1010;
        background: var(--ml-bg-elev);
    }
    #mailApp .mail-read.mobile-open { display: flex !important; }
    .mail-read-back { display: inline-flex; }
    .mail-read-head { padding: 6px 8px; gap: 4px; }
    .mail-read-subject { font-size: 15px; }
    .mail-read-acts { gap: 0; }
    .mail-read-acts .mail-icon-btn { width: 30px; height: 30px; font-size: 14px; }
    .mail-read-meta { padding: 10px 12px; }
    .mail-read-body { padding: 14px 14px 20px; font-size: 15px; }
    .mail-attachs { padding: 0 14px 12px; }
    .mail-read-foot { padding: 8px 12px; }
    .mail-read-foot .mail-btn { flex: 1 1 auto; padding: 0 10px; }
    .mail-quick {
        padding: 8px 12px calc(10px + env(safe-area-inset-bottom, 0px));
        position: sticky;
        bottom: 0;
        background: var(--ml-bg-elev);
    }

    /* 写信（集成）：移动端铺满主区 */
    .mail-compose { display: none; height: 100%; }
    .mail-main.composing .mail-compose { display: flex; }
    /* 通讯录（集成）：移动端铺满主区 */
    .mail-contacts { display: none; height: 100%; }
    .mail-main.contacts .mail-contacts { display: flex; }
    .mail-compose-body { padding: 8px 12px 12px; }
    .mail-editor { min-height: 140px; }
    .mail-compose-foot .mail-btn { flex: 1 1 auto; }
    .mail-compose-tip { margin-left: 0; flex: 1 1 100%; text-align: left; white-space: normal; }

    /* 弹窗 */
    .mail-modal,
    .mail-modal-sm,
    .mail-modal-xs {
        width: calc(100vw - 24px);
        max-width: calc(100vw - 24px);
        max-height: calc(100dvh - 48px);
    }
    .mail-modal-body { padding: 14px; }
    .mail-modal-foot { padding: 10px 12px; }
    .mail-modal-foot .mail-btn { flex: 1 1 auto; }
    .mail-form-row { flex-direction: column; align-items: stretch; gap: 6px; }
    .mail-form-row > span { flex: none; width: auto; }
    .mail-modal-bar .mail-input { flex: 1 1 100%; }

    .mail-ct-item { flex-wrap: wrap; }
    .mail-ct-main { flex: 1 1 60%; }

    .mail-menu { max-width: calc(100vw - 24px); }
    .mail-toast { bottom: 24px; padding: 8px 14px; font-size: 12.5px; }
}

/* 超小屏 */
@media (max-width: 380px) {
    .mail-brand { display: none; }
    .mail-list-title { font-size: 16px; }
    .mail-chip { height: 24px; padding: 0 10px; font-size: 12px; }
}

/* ==========================================================================
   13. 深色模式（只覆盖变量）
      弹窗 / 写信窗口 / Toast 在 #mailApp 之外，故用 :has() 同步到 body
   ========================================================================== */
#mailApp[data-theme="dark"],
body.page-mail-full:has(#mailApp[data-theme="dark"]),
body.page-mail-full[data-theme="dark"] {
    --ml-bg: #0f1216;
    --ml-bg-elev: #171b21;
    --ml-bg-hover: #21262e;
    --ml-bg-active: #1d2836;
    --ml-border: #272d36;
    --ml-border-strong: #3a424e;
    --ml-text: #e6e9ee;
    --ml-text-dim: #a4adba;
    --ml-text-mute: #7b8493;
    --ml-accent-soft: rgba(122, 167, 255, .16);
    --ml-danger: #f0685c;
    --ml-danger-soft: rgba(240, 104, 92, .16);
    --ml-star: #f7c948;
    --ml-shadow: 0 12px 36px rgba(0, 0, 0, .55);
    --ml-shadow-sm: 0 2px 10px rgba(0, 0, 0, .4);
    color-scheme: dark;
}
/* 深色下主色由 JS 直接写入 --ml-accent（内联样式优先级最高），
   此处不再改写 --ml-accent（自定义属性不能自引用），仅提亮派生色。 */
#mailApp[data-theme="dark"] .mail-compose-head,
#mailApp[data-theme="dark"] .mail-top { background: var(--ml-bg-elev); }
#mailApp[data-theme="dark"] .mail-toast,
body.page-mail-full:has(#mailApp[data-theme="dark"]) .mail-toast {
    background: rgba(58, 65, 76, .96);
    color: #f2f4f7;
}
#mailApp[data-theme="dark"] .mail-search-clear { background: var(--ml-border); color: var(--ml-text-dim); }
#mailApp[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--ml-text-mute) 55%, transparent);
}

/* ==========================================================================
   14. 打印（只留正文）
   ========================================================================== */
@media print {
    body.page-mail-full { height: auto; overflow: visible; }
    body.page-mail-full .app,
    body.page-mail-full .main-content { height: auto; max-height: none; overflow: visible; }
    .mail-top,
    .mail-side,
    .mail-list-pane,
    .mail-read-head .mail-read-acts,
    .mail-read-foot,
    .mail-quick,
    .mail-compose,
    .mail-modal,
    .mail-modal-mask,
    .mail-gate,
    .mail-toast { display: none !important; }
    .mail-read { position: static !important; }
    .mail-read-body { overflow: visible; }
}

/* ==========================================================================
   15. 补充组件：表情面板 / 撤回提示 / 侧栏空态
   ========================================================================== */
.mail-emoji-pop {
    position: absolute;
    right: 12px;
    bottom: 96px;
    z-index: 30;
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 2px;
    padding: 8px;
    background: var(--ml-bg-elev);
    border: 1px solid var(--ml-border);
    border-radius: 12px;
    box-shadow: var(--ml-shadow);
}
.mail-emoji-pop button {
    width: 28px; height: 28px;
    border: 0; background: transparent; cursor: pointer;
    font-size: 17px; line-height: 1; border-radius: 6px;
}
.mail-emoji-pop button:hover { background: var(--ml-bg-hover); }

.mail-recalled { color: var(--ml-text-dim); font-style: italic; }
#mailReadStar.on { color: var(--ml-star); }
.mail-side-empty { padding: 4px 10px 8px; font-size: 12px; color: var(--ml-text-mute); }

@media (max-width: 767px) {
    .mail-emoji-pop { grid-template-columns: repeat(8, 1fr); right: 8px; bottom: 132px; }
}

/* ==========================================================================
   16. QQ 邮箱风格：列表头像 / 移动端选择模式 / 写信 FAB / 平板与手机端优化
   ========================================================================== */
/* 列表项头像：桌面隐藏，移动/平板显示，复刻 QQ 邮箱手机端收件列表 */
.mail-item-av {
    flex: 0 0 auto;
    width: 38px;
    height: 38px;
    margin-top: 1px;
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
    text-transform: uppercase;
    user-select: none;
    overflow: hidden;
}
/* 列表项内部次序（桌面：复选框 → 星标 → 正文 → 附件） */
.mail-item .mail-check { order: 0; }
.mail-star { order: 1; }
.mail-item-main { order: 2; }
.mail-item-attach { order: 3; }

/* 选择模式按钮：默认隐藏，仅手机显示 */
.mail-sel-btn {
    display: none;
    align-items: center;
    height: 30px;
    padding: 0 12px;
    border: 1px solid var(--ml-border);
    border-radius: 999px;
    background: var(--ml-bg-elev);
    color: var(--ml-text-dim);
    font-family: inherit;
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, color .15s, border-color .15s;
}
.mail-sel-btn:hover { color: var(--ml-accent); border-color: var(--ml-accent); }
.mail-sel-btn.on { background: var(--ml-accent); border-color: var(--ml-accent); color: #fff; }

/* 写信悬浮按钮（FAB，仅手机端） */
.mail-fab {
    display: none;
    position: fixed;
    right: 16px;
    bottom: calc(20px + env(safe-area-inset-bottom, 0px));
    width: 54px;
    height: 54px;
    border: 0;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    background: var(--ml-accent);
    color: #fff;
    font-size: 22px;
    line-height: 1;
    box-shadow: 0 8px 22px color-mix(in srgb, var(--ml-accent) 42%, transparent);
    z-index: 1080;
    cursor: pointer;
    transition: filter .15s, transform .1s;
}
.mail-fab:active { filter: brightness(.92); transform: scale(.96); }
#mailApp.reading .mail-fab { display: none !important; }

/* 平板与手机（≤1023）：显示头像，星标移到右侧 */
@media (max-width: 1023px) {
    .mail-item-av { display: inline-flex; }
    .mail-item .mail-check { order: 0; }
    .mail-item-av { order: 1; }
    .mail-item-main { order: 2; }
    .mail-star { order: 3; margin-left: 0; }
    .mail-item-attach { order: 4; }
    /* 选择模式：头像位置替换为复选框 */
    .selecting .mail-item-av { display: none; }
    .selecting .mail-item .mail-check { display: inline-flex; }
    .selecting .mail-star { display: none; }
}

/* 手机（<768） */
@media (max-width: 767px) {
    .mail-sel-btn { display: inline-flex; }
    .mail-fab { display: inline-flex; }
    /* 默认隐藏批量复选框（节省空间），进入“选择”模式后才显示 */
    .mail-item .mail-check { display: none; }
    /* 阅读底部操作栏：回复 / 全部回复 / 转发 一行等分 */
    .mail-read-foot { flex-wrap: nowrap; padding: 8px 10px; gap: 6px; }
    .mail-read-foot .mail-btn { flex: 1 1 0; min-width: 0; padding: 0 4px; font-size: 12.5px; }
    .mail-item-from { font-size: 14px; }
    .mail-item-subject { font-size: 14px; }
    .mail-item-snippet { font-size: 12.5px; }
    /* 列表项点击态高亮（复刻 QQ 按压反馈） */
    .mail-item:active { background: var(--ml-accent-soft); }
}

/* 超小屏手机：FAB 略缩小，避免遮挡内容 */
@media (max-width: 380px) {
    .mail-fab {
        width: 50px; height: 50px; right: 12px;
        bottom: calc(14px + env(safe-area-inset-bottom, 0px));
    }
}