:root{font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:#1f2a37;background:#f7f8f9;font-synthesis:none;font-weight:400;--green:#007bff;--muted:#858b92;--border:#e3e6e9}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible{outline:3px solid #8da4bc;outline-offset:4px}input:focus{outline:none}[hidden]{display:none!important}svg{stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}a{color:inherit;text-decoration:none}.site-header{max-width:1280px;margin:auto;height:91px;padding:0 44px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:11px;font-weight:650;font-size:17px;letter-spacing:.5px}.brand-icon{background:var(--green);color:#fff;width:36px;height:36px;border-radius:11px;display:grid;place-items:center}.brand-icon 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.2s,box-shadow .2s}.query-form:focus-within{border-color:#8294a7;box-shadow:0 0 0 3px #e4e9ef}.input-icon{width:22px;height:22px;color:#9199a2;flex-shrink:0}.query-form input{width:100%;min-width:0;border:0;background:transparent;color:#1f2a37;font-size:14px;height:42px}.query-form input::placeholder{color:#a4aab0}.query-form button{background:var(--green);border:0;border-radius:8px;color:#fff;height:44px;padding:0 19px;display:flex;align-items:center;gap:13px;flex-shrink:0;font-size:13px;transition:background .15s}.query-form button:hover{background:#0069d9}.query-form button:disabled{opacity:.68}.query-form button svg{width:17px;height:17px}.intro .permission-note{font-size:11px;color:#a3a8ae}.notice{max-width:604px;margin:15px auto 0;border:1px solid #eadfcd;color:#8b6840;background:#fffaf2;padding:11px 15px;border-radius:9px;font-size:13px;line-height:1.6;text-align:left}.mailbox{background:#fff;border:1px solid var(--border);border-radius:15px;box-shadow:0 8px 28px #2b394804;overflow:hidden}.mailbox-heading{height:65px;padding:0 23px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.mailbox-title{display:flex;align-items:center;gap:10px}.mailbox-title h2{font-size:15px;font-weight:600;margin:0}.count{font-size:11px;color:#838d97;background:#eef1f4;border-radius:5px;min-width:23px;padding:3px 6px;text-align:center}.refresh-button{border:1px solid #dee3e8;background:#fff;color:#5d6b7a;border-radius:7px;padding:7px 11px;display:flex;gap:6px;align-items:center;font-size:12px}.refresh-button svg{width:15px;height:15px}.refresh-button:hover:enabled{background:#f2f4f7}.refresh-button:disabled{opacity:.42}.mailbox-body{display:grid;grid-template-columns:330px minmax(0,1fr);min-height:422px}.message-panel{border-right:1px solid var(--border);min-width:0;background:#fdfdfe}.list-state{text-align:center;padding:92px 14px;color:#9198a0}.state-mini-icon{display:grid;place-items:center;width:29px;height:29px;margin:0 auto 15px;border:1px solid #dde3e9;border-radius:9px;font-size:18px;color:#a6adb5}.list-state p{font-size:13px;margin:0 0 8px}.list-state>span:last-child{font-size:11px;color:#acb1b7;line-height:1.7}.message-list{list-style:none;padding:0;margin:0;max-height:650px;overflow:auto}.message-list li+li{border-top:1px solid #eceff2}.message-item{width:100%;border:0;border-left:3px solid transparent;background:transparent;text-align:left;padding:20px 20px 20px 17px;color:#253241;display:block}.message-item:hover{background:#f4f6f9}.message-item.selected{background:#ecf1f6;border-left-color:#49617b}.message-item-top{display:flex;align-items:center;gap:10px;justify-content:space-between}.message-item-from{font-size:12px;font-weight:600;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.message-item-date{font-size:10px;color:#a0a7ae;flex-shrink:0}.message-item-subject{display:block;font-size:13px;margin-top:9px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.message-detail{min-width:0}.detail-state{min-height:422px;padding:67px 20px 45px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center}.empty-illustration{position:relative;width:100px;height:100px;opacity:.82;margin-bottom:17px}.empty-illustration>svg{width:100px;height:80px;position:absolute;left:0;bottom:0}.letter-paper{position:absolute;top:5px;left:24px;width:52px;height:61px;background:#f7f9fb;border:1px solid #c6cfd8;border-radius:5px;transform:rotate(-9deg);z-index:1;padding:16px 9px}.letter-paper i{display:block;height:2px;background:#cfd8e1;margin-bottom:7px}.letter-paper i:last-child{width:18px}.detail-state h3{font-size:15px;font-weight:500;margin:0 0 10px;color:#707c88}.detail-state p{font-size:12px;color:#9fa6ad;margin:0;line-height:1.8}.message-header{padding:28px 30px 22px;border-bottom:1px solid #e9edf2}.message-overline{font-size:10px;letter-spacing:2px;color:#919aa4;margin-bottom:11px}.message-header h3{font-size:20px;font-weight:600;line-height:1.55;overflow-wrap:anywhere;margin:0 0 20px}.sender-line{display:flex;gap:10px;align-items:center;min-width:0}.sender-avatar{width:34px;height:34px;border-radius:50%;background:#e8eef4;color:#6d7f92;display:grid;place-items:center;font-size:13px;flex-shrink:0}.sender-line>div{min-width:0}.message-from{font-size:12px;color:#5a6672;overflow-wrap:anywhere}.sender-line time{font-size:10px;color:#99a0a7;display:block;margin-top:4px}#email-body{display:block;width:100%;height:480px;border:0;background:white}.site-footer{max-width:1192px;margin:auto;padding:0 0 27px;display:flex;justify-content:space-between;font-size:10px;color:#a0a7ae}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;padding:0;margin:-1px}.loading .empty-illustration{animation:breathe 1.3s ease-in-out infinite}@keyframes breathe{50%{opacity:.35;transform:translateY(-3px)}}@media(min-width:1440px){.intro{padding-top:74px;padding-bottom:45px}}@media(max-width:1270px){main{padding-right:32px;padding-left:32px}.site-footer{margin:0 32px}.site-header{padding:0 32px}}@media(max-width:800px){.site-header{height:75px;padding:0 23px}main{padding:0 20px 25px}.intro{padding:44px 0 30px}h1{font-size:33px;letter-spacing:-.6px}.mailbox-body{grid-template-columns:260px minmax(0,1fr)}.detail-state{padding:45px 18px}.message-header{padding:24px 20px}.site-footer{margin:0 21px}}@media(max-width:620px){.brand{font-size:15px}.brand-icon{width:32px;height:32px}.service-status{font-size:10px}.intro{padding-top:39px}.eyebrow{font-size:10px;letter-spacing:2px}h1{font-size:32px;margin:16px 0 13px}.mobile-break{display:block}.intro>p{font-size:12px}.query-form{gap:9px;padding-left:13px;margin-top:25px;border-radius:11px}.query-form input{font-size:12px;height:40px}.input-icon{width:18px;height:18px}.query-form button{font-size:12px;padding:0 13px;height:41px;gap:7px}.query-form button svg{display:none}.mailbox-heading{height:59px;padding:0 18px}.mailbox-body{display:block}.message-panel{border-right:0;border-bottom:1px solid var(--border)}.list-state{padding:30px 14px}.state-mini-icon{display:none}.list-state p{margin-bottom:5px}.message-list{max-height:260px}.message-item{padding:15px 18px 15px 15px}.detail-state{min-height:310px;padding:36px 18px}.empty-illustration{transform:scale(.85);margin-bottom:8px}.message-header h3{font-size:18px}.site-footer{font-size:9px}#email-body{height:430px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

.promotion{margin:0 0 20px;border:1px solid #dbe1e7;border-radius:13px;background:linear-gradient(110deg,#ebf0f5,#f5f7fa);overflow:hidden}.promotion-link{display:flex;align-items:center;gap:17px;padding:20px 24px;transition:background .15s}.promotion-link:hover{background:#e6ecf3}.promotion-link:focus-visible{outline-offset:-4px}.promotion-icon{display:grid;place-items:center;flex-shrink:0;width:44px;height:44px;border-radius:12px;background:#dce3eb;color:#445b74}.promotion-icon svg{width:24px;height:24px}.promotion-copy{flex:1;min-width:0}.promotion-title{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.promotion-title h2{margin:0;font-size:15px;font-weight:650;letter-spacing:.3px}.promotion-label{padding:2px 6px;border:1px solid #cad2db;border-radius:4px;font-size:10px;font-weight:400;line-height:1.4;color:#6b7784}.promotion-copy p{margin:6px 0 0;font-size:12px;line-height:1.6;color:#6d7884;overflow-wrap:anywhere}.promotion-action{display:flex;align-items:center;gap:7px;flex-shrink:0;font-size:12px;color:#395068}.promotion-action svg{width:17px;height:17px}@media(max-width:620px){.promotion{margin-bottom:16px}.promotion-link{padding:16px;gap:12px;flex-wrap:wrap}.promotion-icon{width:37px;height:37px;border-radius:10px}.promotion-icon svg{width:21px;height:21px}.promotion-title h2{font-size:14px}.promotion-copy p{font-size:11px}.promotion-action{margin-left:49px;font-size:11px}.promotion-copy{flex-basis:calc(100% - 49px)}}

/* ===== 与主站(明天科技)同步的头部/导航/页脚 2026-09-21 ===== */
.site-header{gap:24px;background:#fff}
.brand{gap:10px;flex-shrink:0}.brand img{height:40px;width:auto;max-width:130px;object-fit:contain}.brand strong{font-size:20px;font-weight:700;color:#1f2a37;white-space:nowrap}
.mt-nav{display:flex;align-items:center;gap:18px;font-size:15px;font-weight:700;white-space:nowrap;color:#333}
.mt-nav a{padding:6px 2px;border-bottom:2px solid transparent}.mt-nav a:hover{color:#007bff}
.mt-nav .teal{color:#17a2b8}.mt-nav .red{color:#e53935}.mt-nav .green{color:#28a745}
.mt-nav .current{color:#007bff;border-bottom-color:#007bff}
.site-footer{align-items:center;flex-wrap:wrap;gap:12px;font-size:12px;border-top:1px solid var(--border);padding-top:22px;margin-top:8px}
.footer-brand{display:flex;align-items:center;gap:8px;color:#4b5563}.footer-brand img{height:22px;width:auto}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}.footer-links a{color:#6b7280}.footer-links a:hover{color:#007bff}
@media(max-width:1000px){.site-header{flex-wrap:wrap;height:auto;padding-top:14px;padding-bottom:10px}.mt-nav{order:3;width:100%;overflow-x:auto;gap:16px;font-size:14px;padding-bottom:4px;-webkit-overflow-scrolling:touch}}
@media(max-width:620px){.brand img{height:32px}.brand strong{font-size:17px}.mt-nav{font-size:13px;gap:14px}.site-footer{flex-direction:column;align-items:flex-start}}