:root{color-scheme:light;--color-bg-page: #f5f5f7;--color-bg-container: #ffffff;--color-bg-elevated: #ffffff;--color-bg-subtle: #fafafa;--color-bg-hover: #f5f5f7;--color-bg-active: #e8e8ed;--color-text-primary: #1d1d1f;--color-text-regular: #424245;--color-text-secondary: #6e6e73;--color-text-tertiary: #86868b;--color-text-placeholder: #a1a1a6;--color-border: rgba(0, 0, 0, .1);--color-border-light: rgba(0, 0, 0, .06);--color-border-strong: rgba(0, 0, 0, .18);--color-primary: #1d1d1f;--color-primary-hover: #000000;--color-primary-foreground: #ffffff;--color-danger: #d70015;--color-success: #248a3d;--color-info-bg: rgba(58, 58, 60, .08);--font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-round: 9999px;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .04);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .06);--shadow-md: 0 8px 24px rgba(0, 0, 0, .08);--shadow-lg: 0 18px 48px rgba(0, 0, 0, .12);--focus-ring: 0 0 0 3px rgba(29, 29, 31, .12);--duration-fast: .12s;--duration-base: .2s;--ease-out: cubic-bezier(.16, 1, .3, 1)}[data-theme=dark]{color-scheme:dark;--color-bg-page: #000000;--color-bg-container: #1c1c1e;--color-bg-elevated: #2c2c2e;--color-bg-subtle: #1c1c1e;--color-bg-hover: #2c2c2e;--color-bg-active: #3a3a3c;--color-text-primary: #f5f5f7;--color-text-regular: #e5e5ea;--color-text-secondary: #aeaeb2;--color-text-tertiary: #8e8e93;--color-text-placeholder: #8e8e93;--color-border: rgba(255, 255, 255, .12);--color-border-light: rgba(255, 255, 255, .07);--color-border-strong: rgba(255, 255, 255, .2);--color-primary: #f5f5f7;--color-primary-hover: #ffffff;--color-primary-foreground: #000000;--color-danger: #ff453a;--color-success: #30a14e;--color-info-bg: rgba(209, 209, 214, .12);--shadow-lg: 0 18px 48px rgba(0, 0, 0, .36);--focus-ring: 0 0 0 3px rgba(245, 245, 247, .2)}*{box-sizing:border-box}html,body,#app{width:100%;min-height:100%;margin:0}html{background:var(--color-bg-page);font-family:var(--font-sans)}body{color:var(--color-text-primary);background:var(--color-bg-page);font-size:14px;line-height:1.5;overflow-x:hidden}button,input,textarea{color:inherit;font:inherit}button,a{touch-action:manipulation}button{border:0;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:0;box-shadow:var(--focus-ring)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:5000;top:8px;left:8px;padding:10px 14px;border-radius:var(--radius-md);color:var(--color-primary-foreground);background:var(--color-primary);transform:translateY(-150%);transition:transform var(--duration-base)}.skip-link:focus{transform:none}.boot-screen{min-height:100dvh;display:grid;place-content:center;justify-items:center;gap:12px;color:var(--color-text-secondary)}.spinner{display:inline-block;width:24px;height:24px;border:2px solid var(--color-border-strong);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}.spinner.small{width:16px;height:16px;border-color:color-mix(in srgb,var(--color-primary-foreground) 35%,transparent);border-top-color:var(--color-primary-foreground)}@keyframes spin{to{transform:rotate(360deg)}}.brand,.app-brand{display:flex;align-items:center;gap:10px}.brand-mark{width:38px;height:38px;display:grid;place-items:center;flex:0 0 auto;border-radius:11px;color:var(--color-primary-foreground);background:var(--color-primary);font-size:12px;font-weight:700;letter-spacing:-.04em}.brand-logo{width:38px;height:38px;flex:0 0 auto;border-radius:9px;object-fit:contain}.brand span:last-child,.app-brand div{display:grid;line-height:1.15}.brand strong,.app-brand strong{font-size:14px;font-weight:650}.brand small,.app-brand small{margin-top:4px;color:var(--color-text-secondary);font-size:11px;font-weight:400}.icon-button{width:44px;height:44px;display:inline-grid;place-items:center;flex:0 0 auto;border-radius:var(--radius-md);color:var(--color-text-regular);background:transparent;transition:color var(--duration-fast),background var(--duration-fast)}.icon-button:hover{color:var(--color-text-primary);background:var(--color-bg-hover)}.icon-button.danger:hover{color:var(--color-danger)}.primary-button,.secondary-button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:0 18px;border-radius:var(--radius-md);font-weight:600;transition:background var(--duration-fast),color var(--duration-fast),transform var(--duration-fast)}.primary-button{color:var(--color-primary-foreground);background:var(--color-primary)}.primary-button:hover{background:var(--color-primary-hover)}.primary-button:active,.secondary-button:active{transform:scale(.98)}.secondary-button{color:var(--color-text-primary);background:var(--color-bg-active)}.login-page{min-height:100dvh;display:grid;grid-template-rows:auto 1fr auto;background:radial-gradient(circle at 72% 34%,color-mix(in srgb,var(--color-text-primary) 5%,transparent),transparent 31%),var(--color-bg-page)}.public-nav{width:min(1280px,calc(100% - 48px));height:72px;margin:auto;display:flex;align-items:center;justify-content:space-between}.login-hero{width:min(1180px,calc(100% - 48px));margin:auto;display:grid;grid-template-columns:minmax(0,.9fr) minmax(520px,1.1fr);align-items:center;gap:76px;padding:72px 0 96px}.login-copy{max-width:520px}.eyebrow{display:inline-block;margin-bottom:20px;color:var(--color-text-secondary);font-size:12px;font-weight:650;letter-spacing:.16em}.login-copy h1{margin:0;font-size:clamp(42px,5vw,68px);line-height:1.08;letter-spacing:-.045em}.login-copy>p{max-width:500px;margin:24px 0 30px;color:var(--color-text-secondary);font-size:17px;line-height:1.7}.login-button{padding-inline:22px}.trust-row{display:flex;flex-wrap:wrap;gap:18px;margin-top:26px;color:var(--color-text-secondary);font-size:12px}.trust-row span{display:inline-flex;align-items:center;gap:6px}.mail-preview{min-height:450px;overflow:hidden;border:1px solid var(--color-border);border-radius:22px;background:color-mix(in srgb,var(--color-bg-container) 84%,transparent);box-shadow:var(--shadow-lg);transform:perspective(1200px) rotateY(-5deg) rotateX(2deg)}.preview-bar{height:48px;display:flex;align-items:center;gap:7px;padding:0 18px;border-bottom:1px solid var(--color-border-light)}.preview-bar i{width:8px;height:8px;border-radius:50%;background:var(--color-border-strong)}.preview-layout{height:400px;display:grid;grid-template-columns:22% 36% 42%}.preview-layout>div{padding:28px 20px;border-right:1px solid var(--color-border-light)}.preview-layout>div:last-child{border:0}.preview-layout span,.preview-layout b,.preview-layout small{display:block;border-radius:5px;background:var(--color-bg-active)}.preview-nav{background:var(--color-bg-subtle)}.preview-nav b{width:80%;height:30px;margin-bottom:34px;background:var(--color-primary)}.preview-nav span{width:88%;height:12px;margin:22px 0}.preview-list b{width:42%;height:13px;margin-bottom:30px}.preview-list span{height:58px;margin:12px 0}.preview-message small{width:24%;height:9px}.preview-message b{width:76%;height:25px;margin:28px 0 22px}.preview-message span{height:9px;margin:14px 0}.preview-message span:nth-last-child(1){width:66%}.public-footer{padding:22px;color:var(--color-text-tertiary);text-align:center;font-size:12px}.mail-shell{min-height:100dvh;background:var(--color-bg-container)}.app-header{position:relative;z-index:100;height:68px;display:grid;grid-template-columns:260px minmax(320px,640px) 1fr;align-items:center;gap:22px;padding:0 18px;border-bottom:1px solid var(--color-border-light);background:color-mix(in srgb,var(--color-bg-container) 82%,transparent);-webkit-backdrop-filter:blur(24px) saturate(1.4);backdrop-filter:blur(24px) saturate(1.4)}.search-field{height:40px;display:flex;align-items:center;gap:9px;padding:0 10px 0 13px;border:1px solid transparent;border-radius:var(--radius-md);color:var(--color-text-secondary);background:var(--color-bg-page);transition:border var(--duration-fast),background var(--duration-fast)}.search-field:focus-within{border-color:var(--color-border-strong);background:var(--color-bg-container);box-shadow:var(--focus-ring)}.search-field 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small{margin-top:4px;color:var(--color-success);font-size:10px;letter-spacing:.04em}.account-menu{position:absolute;top:calc(100% + 8px);right:0;width:210px;padding:7px;border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-bg-elevated);box-shadow:var(--shadow-md)}.account-menu a,.account-menu button{width:100%;min-height:42px;display:flex;align-items:center;gap:10px;padding:0 11px;border-radius:var(--radius-md);background:transparent;text-align:left}.account-menu a:hover,.account-menu button:hover{background:var(--color-bg-hover)}.account-menu button{color:var(--color-danger)}.mail-workspace{height:calc(100dvh - 68px);display:grid;grid-template-columns:248px 380px minmax(0,1fr);overflow:hidden}.folder-sidebar{display:flex;flex-direction:column;padding:18px 12px;border-right:1px solid var(--color-border-light);background:var(--color-bg-subtle)}.compose-button{min-height:44px;display:flex;align-items:center;justify-content:center;gap:9px;margin:0 4px 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solid var(--color-border-light);border-radius:12px;background:var(--color-bg-container);box-shadow:0 12px 32px #00000024}.filter-menu button{width:100%;display:flex;align-items:center;gap:8px;padding:9px 12px;border:0;border-radius:8px;background:transparent;color:var(--color-text-primary);font:inherit;font-size:13px;text-align:left;cursor:pointer}.filter-menu button:hover{background:var(--color-bg-hover, rgba(0, 0, 0, .05))}.filter-menu button.active{color:var(--color-primary);font-weight:650}.email-list{height:calc(100% - 65px);margin:0;padding:0;overflow-y:auto;list-style:none;overscroll-behavior:contain}.email-list li{border-bottom:1px solid var(--color-border-light)}.email-list button{position:relative;width:100%;min-height:106px;display:grid;grid-template-columns:35px minmax(0,1fr);gap:11px;padding:15px 16px;background:transparent;text-align:left;transition:background var(--duration-fast)}.email-list button:hover{background:var(--color-bg-hover)}.email-list button.selected{background:var(--color-bg-active)}.email-list button.unread .email-line strong,.email-list button.unread .email-subject{font-weight:700;color:var(--color-text-primary)}.sender-avatar{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;color:var(--color-text-regular);background:var(--color-bg-active);font-size:12px;font-weight:650}.sender-avatar.large{width:42px;height:42px;font-size:14px}.email-copy{min-width:0;display:grid;gap:3px}.email-line{min-width:0;display:flex;align-items:baseline;justify-content:space-between;gap:8px}.email-line strong,.email-subject,.email-preview{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.email-line strong{color:var(--color-text-regular);font-weight:550}.email-line time{flex:0 0 auto;color:var(--color-text-tertiary);font-size:11px}.email-subject{font-weight:550}.email-preview{color:var(--color-text-secondary);font-size:12px}.unread-dot{position:absolute;top:53px;right:7px;width:6px;height:6px;border-radius:50%;background:var(--color-primary)}.email-skeletons{padding:0 16px}.email-skeleton{height:106px;display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start;padding:16px 0;border-bottom:1px solid var(--color-border-light)}.email-skeleton i{width:34px;height:34px;border-radius:50%;background:var(--color-bg-active)}.email-skeleton span,.email-skeleton b{grid-column:2;height:10px;border-radius:5px;background:linear-gradient(90deg,var(--color-bg-hover),var(--color-bg-active),var(--color-bg-hover));background-size:200% 100%;animation:shimmer 1.2s infinite}.email-skeleton span{width:66%;margin-top:-31px}.email-skeleton b{width:88%;margin-top:-30px}@keyframes shimmer{to{background-position:-200% 0}}.empty-state{height:calc(100% - 65px);display:grid;place-content:center;justify-items:center;padding:30px;color:var(--color-text-secondary);text-align:center}.empty-state h2{margin:14px 0 4px;color:var(--color-text-primary);font-size:17px}.empty-state p{max-width:280px;margin:0 0 18px;font-size:12px}.reader-panel{min-width:0;overflow:auto;background:var(--color-bg-container)}.reader-empty,.reader-loading{height:100%;display:grid;place-content:center;justify-items:center;padding:32px;color:var(--color-text-secondary);text-align:center}.reader-empty-icon{width:74px;height:74px;display:grid;place-items:center;border-radius:22px;color:var(--color-text-regular);background:var(--color-bg-page)}.reader-empty h2{margin:18px 0 5px;color:var(--color-text-primary);font-size:18px}.reader-empty p{margin:0 0 18px}.reader-empty>span{display:inline-flex;align-items:center;gap:6px;font-size:11px}.reader-toolbar{position:sticky;z-index:10;top:0;height:65px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid var(--color-border-light);background:color-mix(in srgb,var(--color-bg-container) 90%,transparent);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.toolbar-group{display:flex;gap:3px}.more-menu-wrap{position:relative}.more-menu{position:absolute;z-index:30;top:calc(100% + 6px);right:0;min-width:168px;padding:6px;border:1px solid var(--color-border-light);border-radius:12px;background:var(--color-bg-container);box-shadow:0 12px 32px #00000024}.more-menu button{width:100%;display:flex;align-items:center;gap:8px;padding:9px 12px;border:0;border-radius:8px;background:transparent;color:var(--color-text-primary);font:inherit;font-size:14px;text-align:left;cursor:pointer}.more-menu button:hover{background:var(--color-bg-hover, rgba(0, 0, 0, .05))}.more-menu__danger{color:var(--color-danger, #d92d20)!important}.back-button{display:none;width:44px;height:44px;place-items:center;border-radius:var(--radius-md);background:transparent}.reader-content{max-width:820px;margin:0 auto;padding:46px 48px 80px}.message-kicker{margin:0 0 10px;color:var(--color-text-secondary);font-size:11px;font-weight:650;letter-spacing:.09em;text-transform:uppercase}.reader-content h1{margin:0;font-size:clamp(26px,3vw,38px);line-height:1.2;letter-spacing:-.025em;overflow-wrap:anywhere}.message-meta{display:grid;grid-template-columns:42px minmax(0,1fr) auto;align-items:center;gap:12px;margin-top:28px}.message-meta div{min-width:0;display:grid}.message-meta strong{font-size:14px}.message-meta small{overflow:hidden;margin-top:2px;color:var(--color-text-secondary);font-size:11px;white-space:nowrap;text-overflow:ellipsis}.message-meta time{color:var(--color-text-secondary);font-size:11px}.privacy-notice{display:flex;align-items:flex-start;gap:8px;margin:30px 0;padding:10px 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pre{margin:14px 0;padding:12px 14px;border-radius:10px;overflow-x:auto;background:var(--color-bg-page);font-size:13px}.message-body-html code{padding:1px 5px;border-radius:6px;background:var(--color-bg-active);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em}.message-body-html img{max-width:100%;height:auto;border-radius:8px}.message-body-html table{max-width:100%;border-collapse:collapse}.message-body-html table td,.message-body-html table th{padding:6px 10px;border:1px solid var(--color-border-light)}.message-body-html hr{margin:18px 0;border:0;border-top:1px solid var(--color-border-light)}.reader-attachments{display:grid;gap:8px;margin-top:30px}.reader-attachments h2{margin:0 0 4px;font-size:13px}.reader-attachments>button{min-height:52px;display:flex;align-items:center;gap:10px;padding:8px 12px;border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text-primary);background:var(--color-bg-container);text-align:left}.reader-attachments>button:hover{background:var(--color-bg-hover)}.reader-attachments>button:disabled{cursor:wait;opacity:.72}.reader-attachments>button>span{min-width:0;display:grid}.reader-attachments strong{overflow:hidden;font-size:12px;text-overflow:ellipsis;white-space:nowrap}.reader-attachments small{color:var(--color-text-secondary);font-size:10px}.attachment-error{display:flex;align-items:center;gap:7px;color:var(--color-danger);font-size:12px}.reply-button{min-height:42px;display:inline-flex;align-items:center;gap:8px;margin-top:38px;padding:0 16px;border:1px solid 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