* { box-sizing: border-box; }
html { font-size: 15px; }
body { margin: 0; font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; color: #1f2933; background: #f4f6f8; line-height: 1.6; }
a { color: #1a64c8; }
button, input, select { font: inherit; font-size: 15px; }
.hidden { display: none !important; }
.muted { color: #6b7785; }
.small { font-size: 14px; }
.ok { color: #1f8a4c; }
.bad { color: #c62828; }
.warn { color: #b26a00; }

header.top { display: flex; align-items: center; gap: 16px; padding: 10px 20px; background: #1d2b3a; color: #fff; flex-wrap: wrap; }
header.top .title { font-size: 18px; font-weight: 600; }
header.top nav { display: flex; gap: 4px; flex-wrap: wrap; }
header.top nav button, header.top nav a { background: transparent; color: #cfd8e3; border: 0; padding: 6px 12px; border-radius: 4px; cursor: pointer; text-decoration: none; font-size: 15px; }
header.top nav button.active, header.top nav button:hover, header.top nav a:hover { background: #2f4358; color: #fff; }
header.top .who { margin-left: auto; font-size: 14px; color: #cfd8e3; }
header.top .who button { margin-left: 8px; }

main { max-width: 1180px; margin: 0 auto; padding: 18px 20px 60px; }
.card { background: #fff; border-radius: 8px; box-shadow: 0 1px 3px rgba(0, 0, 0, .08); padding: 18px 20px; margin-bottom: 18px; }
.card h2 { margin: 0 0 12px; font-size: 17px; }
.card h3 { margin: 16px 0 8px; font-size: 15px; }

.btn { background: #1a64c8; color: #fff; border: 0; border-radius: 5px; padding: 7px 16px; cursor: pointer; }
.btn:hover { background: #1554a8; }
.btn:disabled { background: #9db3cf; cursor: default; }
.btn.light { background: #eef2f6; color: #1f2933; }
.btn.light:hover { background: #dfe6ee; }
.btn.danger { background: #c62828; }
.btn.small { padding: 3px 10px; font-size: 14px; }

input[type=text], input[type=password], input[type=email], select { border: 1px solid #c9d2dc; border-radius: 5px; padding: 7px 10px; min-width: 0; }
input:focus, select:focus { outline: 2px solid #9cc2f5; border-color: #1a64c8; }
label { display: block; margin: 10px 0 4px; font-size: 14px; color: #52606d; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row > label { margin: 0; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid #edf0f3; vertical-align: top; }
th { background: #f7f9fb; color: #52606d; font-weight: 600; white-space: nowrap; }
tr.overdue td { background: #fff4f4; }
td.wrap { word-break: break-all; }

.tag { display: inline-block; padding: 0 8px; border-radius: 10px; font-size: 14px; background: #eef2f6; white-space: nowrap; }
.tag.ok { background: #e3f4ea; color: #1f8a4c; }
.tag.bad { background: #fde8e8; color: #c62828; }
.tag.warn { background: #fff3dc; color: #b26a00; }
.tag.info { background: #e6effb; color: #1a64c8; }

.banner { background: #fff8e1; border: 1px solid #f3d27a; color: #7a5600; padding: 10px 14px; border-radius: 6px; margin-bottom: 12px; }
.notice { background: #e6effb; border: 1px solid #b9d0f0; color: #1d4f91; padding: 10px 14px; border-radius: 6px; margin-bottom: 12px; }
.error-box { background: #fde8e8; border: 1px solid #f2b8b8; color: #9b1c1c; padding: 10px 14px; border-radius: 6px; margin: 10px 0; }

.drop { border: 2px dashed #9db3cf; border-radius: 8px; padding: 30px; text-align: center; color: #52606d; background: #f9fbfd; cursor: pointer; }
.drop.over { background: #e6effb; border-color: #1a64c8; }
.drop strong { color: #1f2933; font-size: 16px; }

.login-wrap { max-width: 420px; margin: 70px auto; }
.tabs { display: flex; border-bottom: 1px solid #dfe6ee; margin-bottom: 14px; }
.tabs button { flex: 1; background: none; border: 0; padding: 10px; cursor: pointer; color: #6b7785; font-size: 15px; border-bottom: 2px solid transparent; }
.tabs button.active { color: #1a64c8; border-bottom-color: #1a64c8; font-weight: 600; }
.full { width: 100%; }

.bigcode { font-size: 32px; letter-spacing: 6px; font-weight: 700; color: #1a64c8; }
pre.msg { white-space: pre-wrap; margin: 0; font: inherit; font-size: 14px; }

/* 使用说明正文 */
.guide h1 { font-size: 22px; margin: 0 0 6px; }
.guide h2 { font-size: 18px; margin: 26px 0 8px; padding-bottom: 4px; border-bottom: 1px solid #edf0f3; }
.guide h3 { font-size: 16px; margin: 18px 0 6px; }
.guide p, .guide li { font-size: 15px; }
.guide ol, .guide ul { padding-left: 24px; }
.guide li { margin: 4px 0; }
.guide .tip { background: #e6effb; border-left: 4px solid #1a64c8; padding: 8px 12px; margin: 10px 0; }
.guide .warn { background: #fff8e1; border-left: 4px solid #e0a800; padding: 8px 12px; margin: 10px 0; color: #5c4400; }
.guide table { margin: 8px 0; }
.guide th, .guide td { border: 1px solid #e3e8ee; }
.guide .tag.warn { border-left: 0; padding: 0 8px; margin: 0; }
.guide code { background: #eef2f6; padding: 0 4px; border-radius: 3px; }