html, body { margin: 0; padding: 0; box-sizing: border-box; width: 100vw; overflow-x: hidden; }

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f4faff;
    color: #1A237E;
    padding: 0 0 65px 0;
    max-width: 100vw;
}

header {
    background: linear-gradient(90deg, #13347B 80%, #2685BE 100%);
    color: #fff;
    text-align: center;
    padding: 28px 4vw 18px 4vw;
    border-radius: 0 0 18px 18px;
    margin-bottom: 15px;
    box-shadow: 0 1px 10px 0 #0002;
}

.header-icon { font-size: 2.2rem; margin-bottom: 2px; margin-right: 8px; }

h1 {
    margin: 0 0 7px 0;
    font-size: 2.1rem;
    font-weight: 700;
    display: block;
    word-break: break-word;
    line-height: 1.16;
}

.header-sub {
    color: #BFE8FF;
    margin: 5px auto 0 auto;
    max-width: 97vw;
    font-size: 1.06rem;
    line-height: 1.3;
    word-break: break-word;
}

.main {
    max-width: 980px;
    margin: 0 auto;
    background: #fff;
    border-radius: 12px;
    padding: 22px 3vw 24px 3vw;
    box-shadow: 0 1px 12px 0 #0001;
    word-break: break-word;
    width: 98vw;
    box-sizing: border-box;
}

section {
    background: #e8eaf6;
    padding: 20px 2.5vw 16px 2.5vw;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 1px 3px #0001;
    overflow-x: auto;
    max-width: 100vw;
}

h2 { color: #0D47A1; margin-top: 0; font-size: 1.20rem; }
h3 { color: #0D47A1; margin: 16px 0 8px 0; font-size: 1.05rem; }

code {
    background: #cfd8dc;
    color: #0D47A1;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.98em;
}

pre {
    background: #263238;
    color: #ECEFF1;
    padding: 14px;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.96em;
    word-break: break-word;
    white-space: pre-wrap;
    max-width: 95vw;
}

ul, ol { margin-left: 18px; padding-left: 14px; }
li { margin: 4px 0; }

.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    background: #13347B;
    color: #fff;
    font-size: .84em;
    margin: 0 8px 6px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0 16px 0;
    background: #fff;
    font-size: 0.98em;
}

th, td {
    border: 1px solid #d7def0;
    padding: 9px;
    text-align: left;
    vertical-align: top;
}

th { background: #13347B; color: #fff; }
tr:nth-child(even) { background: #f4faff; }

footer {
    text-align: center;
    padding: 15px 3vw 13px 3vw;
    color: #1A237E;
    background: #F3F9FE;
    position: fixed;
    width: 100vw;
    left: 0;
    bottom: 0;
    font-size: 0.98rem;
    border-top: 1px solid #e1e8f4;
    z-index: 20;
}

@media (max-width: 700px) {
    header { padding: 15px 1vw 12px 1vw; border-radius: 0 0 11px 11px; }
    h1 { font-size: 1.13rem; }
    .main { padding: 10px 2vw 14vw 2vw; width: 99vw; }
    section { padding: 10px 2vw 8px 2vw; font-size: 1em; }
    .header-sub { font-size: 0.99rem; }
}

@media (max-width: 420px) {
    h1 { font-size: 1.01rem; }
    .main { padding: 7px 0 19vw 0; width: 100vw; }
    .header-icon { font-size: 1.5rem; }
}