* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; color: #1f2328; background: #f6f8fa; line-height: 1.7; }
a { color: #0b62c4; text-decoration: none; }
a:hover { text-decoration: underline; }
header { background: #fff; border-bottom: 1px solid #e1e4e8; padding: 14px 0; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.brand { font-size: 18px; font-weight: 700; color: #1f2328; }
.brand small { font-weight: 400; color: #57606a; font-size: 13px; margin-left: 8px; }
main { padding: 24px 0 48px; }
h1 { font-size: 26px; margin-bottom: 8px; }
.sub { color: #57606a; margin-bottom: 24px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; margin-bottom: 32px; }
.card { background: #fff; border: 1px solid #e1e4e8; border-radius: 10px; padding: 20px; }
.card h3 { font-size: 16px; margin-bottom: 6px; }
.card h3 a { color: #1f2328; }
.card p { font-size: 13px; color: #57606a; margin-bottom: 10px; }
.tool-box { background: #fff; border: 1px solid #e1e4e8; border-radius: 10px; padding: 24px; margin-bottom: 24px; }
.form-row { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 14px; align-items: flex-end; }
.form-item { display: flex; flex-direction: column; gap: 4px; }
.form-item label { font-size: 13px; color: #57606a; }
.form-item input, .form-item select { padding: 8px 10px; border: 1px solid #d0d7de; border-radius: 6px; font-size: 15px; min-width: 140px; }
.btn { background: #0b62c4; color: #fff; border: none; padding: 10px 28px; border-radius: 6px; font-size: 15px; cursor: pointer; }
.btn:hover { background: #0852a5; }
.btn.ghost { background: #fff; color: #0b62c4; border: 1px solid #0b62c4; }
.result { margin-top: 18px; }
.result table { width: 100%; border-collapse: collapse; font-size: 14px; }
.result th, .result td { border: 1px solid #e1e4e8; padding: 8px 10px; text-align: left; }
.result th { background: #f6f8fa; }
.big-num { font-size: 28px; font-weight: 700; color: #0b62c4; }
.tag { display: inline-block; font-size: 12px; background: #eaf3ff; color: #0b62c4; border-radius: 4px; padding: 1px 8px; margin-right: 6px; }
.ad-slot { background: #fffbea; border: 1px dashed #d4a72c; border-radius: 8px; padding: 14px; margin: 20px 0; font-size: 13px; color: #57606a; }
.faq { background: #fff; border: 1px solid #e1e4e8; border-radius: 10px; padding: 20px 24px; margin-bottom: 24px; }
.faq h2 { font-size: 18px; margin-bottom: 12px; }
.faq h3 { font-size: 15px; margin: 14px 0 4px; }
.faq p { font-size: 14px; color: #444d56; }
footer { border-top: 1px solid #e1e4e8; padding: 20px 0; font-size: 12px; color: #8b949e; text-align: center; }
.disclaimer { font-size: 12px; color: #8b949e; margin-top: 12px; }
.back { font-size: 13px; margin-bottom: 12px; display: inline-block; }