:root {
    color-scheme:light;
    --paper:#f2f7f5;
    --surface:#fff;
    --ink:#1d302c;
    --muted:#53665f;
    --accent:#28675d;
    --line:#dbe6e0;
    --soft:#e5efea;
}
* {
    box-sizing:border-box;
}
html {
    scroll-behavior:smooth;
    scroll-padding-top:110px;
}
body {
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    font-size:16px;
    line-height:1.8;
    -webkit-font-smoothing:antialiased;
}
a {
    color:var(--accent);
    text-underline-offset:4px;
}
a:hover {
    text-decoration-thickness:2px;
}
a:focus-visible,summary:focus-visible {
    outline:3px solid var(--accent);
    outline-offset:5px;
    border-radius:4px;
}
.skip {
    position:absolute;
    left:20px;
    top:-80px;
    z-index:10;
    padding:8px 16px;
    background:var(--surface);
}
.skip:focus {
    top:12px;
}
.site-header {
    border-bottom:1px solid var(--line);
    background:rgba(242,247,245,.97);
}
.header-inner {
    max-width:1120px;
    margin:auto;
    padding:22px 28px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:28px;
}
.brand {
    display:flex;
    align-items:center;
    gap:10px;
    text-decoration:none;
    color:var(--ink);
    white-space:nowrap;
}
.brand img {
    width:42px;
    height:42px;
    object-fit:contain;
}
.brand strong {
    font-size:20px;
    letter-spacing:-.04em;
}
.brand span {
    font-size:14px;
    color:var(--muted);
    margin-left:6px;
}
.nav {
    display:flex;
    gap:26px;
    align-items:center;
}
.nav a {
    font-size:14px;
    text-decoration:none;
    color:var(--muted);
    white-space:nowrap;
}
.nav a[aria-current=page] {
    color:var(--accent);
    font-weight:650;
}
.nav a[aria-current=page]:after {
    content:"";
    display:block;
    height:2px;
    background:var(--accent);
    margin-top:4px;
}
.shell {
    max-width:1120px;
    margin:0 auto;
    padding:64px 28px 88px;
}
h1,h2,h3,p {
    margin-top:0;
}
h1 {
    font-family:"Songti SC","Noto Serif CJK SC",ui-serif,Georgia,serif;
    font-size:clamp(36px,5vw,56px);
    font-weight:650;
    line-height:1.2;
    letter-spacing:-.03em;
    margin-bottom:22px;
}
h2 {
    font-size:23px;
    font-weight:650;
    line-height:1.5;
    letter-spacing:-.025em;
    margin-bottom:18px;
}
h3 {
    font-size:18px;
    font-weight:650;
    line-height:1.55;
    margin-bottom:10px;
}
.lead {
    max-width:700px;
    font-size:18px;
    line-height:1.9;
    color:var(--muted);
    margin-bottom:0;
}
.meta {
    font-size:14px;
    color:var(--muted);
    margin:20px 0 0;
}
.page-intro {
    padding-bottom:44px;
    border-bottom:1px solid var(--line);
}
.support-grid {
    display:grid;
    grid-template-columns:1.35fr 1fr;
    gap:60px;
    padding-top:44px;
}
.contacts {
    display:grid;
    gap:14px;
    margin-bottom:22px;
}
.contact {
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:16px;
    padding:22px 24px;
    text-decoration:none;
    color:var(--ink);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    transition:border-color .15s,background .15s;
}
.contact:hover {
    background:#f9fcfa;
    border-color:var(--accent);
}
.contact strong {
    display:block;
    font-size:21px;
    font-weight:650;
    line-height:1.45;
}
.contact small {
    display:block;
    font-size:14px;
    color:var(--muted);
    margin-top:6px;
}
.arrow {
    font-size:24px;
    color:var(--accent);
}
.contact-copy {
    color:var(--muted);
    font-size:14px;
    line-height:1.85;
}
.feedback {
    margin-top:32px;
    padding-top:26px;
    border-top:1px solid var(--line);
}
.feedback ul {
    padding-left:20px;
    margin-bottom:14px;
}
.feedback li {
    margin:7px 0;
}
.faq {
    border-top:1px solid var(--line);
    padding:0;
}
.faq:last-child {
    border-bottom:1px solid var(--line);
}
.faq summary {
    cursor:pointer;
    list-style:none;
    display:flex;
    gap:20px;
    align-items:baseline;
    justify-content:space-between;
    font-weight:600;
    line-height:1.7;
    padding:21px 0;
}
.faq summary::-webkit-details-marker {
    display:none;
}
.faq summary:after {
    content:"+";
    font-size:22px;
    font-weight:400;
    color:var(--accent);
    flex:none;
}
.faq[open] summary:after {
    content:"−";
}
.faq .answer {
    color:var(--muted);
    font-size:15px;
    padding:0 30px 20px 0;
}
.answer p:last-child {
    margin-bottom:0;
}
.policy-layout {
    display:grid;
    grid-template-columns:210px minmax(0,1fr);
    gap:70px;
    padding-top:44px;
}
.toc {
    align-self:start;
    position:sticky;
    top:30px;
    font-size:14px;
}
.toc p {
    font-size:14px;
    color:var(--muted);
    margin-bottom:13px;
}
.toc ol {
    list-style:none;
    margin:0;
    padding:0;
    display:grid;
    gap:10px;
}
.toc a {
    text-decoration:none;
    color:var(--muted);
}
.toc a:hover {
    color:var(--accent);
}
.policy {
    max-width:720px;
    min-width:0;
}
.policy section {
    padding-bottom:30px;
    margin-bottom:30px;
    border-bottom:1px solid var(--line);
}
.policy section:last-child {
    margin-bottom:0;
    border:0;
    padding-bottom:0;
}
.policy p,.policy li {
    color:var(--muted);
}
.policy p:last-child {
    margin-bottom:0;
}
.policy ul {
    padding-left:21px;
}
.policy li {
    margin-bottom:8px;
}
.policy strong {
    color:var(--ink);
    font-weight:600;
}
.site-footer {
    border-top:1px solid var(--line);
}
.footer-inner {
    max-width:1120px;
    margin:auto;
    padding:25px 28px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    font-size:14px;
    color:var(--muted);
}
.footer-inner a {
    color:var(--muted);
    text-decoration:none;
}
.footer-links {
    display:flex;
    gap:24px;
}
.plain-link {
    white-space:nowrap;
}
.note {
    font-size:14px;
    color:var(--muted);
}
@media(max-width:760px) {
    .header-inner {
        padding:17px 20px;
        gap:18px;
    }
    .brand span {
        display:none;
    }
    .brand img {
        width:36px;
        height:36px;
    }
    .brand strong {
        font-size:18px;
    }
    .nav {
        gap:18px;
    }
    .nav a {
        font-size:14px;
    }
    .shell {
        padding:42px 20px 60px;
    }
    .page-intro {
        padding-bottom:30px;
    }
    .lead {
        font-size:16px;
    }
    .support-grid {
        grid-template-columns:1fr;
        gap:42px;
        padding-top:30px;
    }
    .policy-layout {
        grid-template-columns:1fr;
        gap:32px;
        padding-top:30px;
    }
    .toc {
        position:static;
        padding-bottom:26px;
        border-bottom:1px solid var(--line);
    }
    .toc ol {
        grid-template-columns:1fr 1fr;
        gap:10px 14px;
    }
    .toc a {
        font-size:14px;
    }
    .policy section {
        padding-bottom:26px;
        margin-bottom:26px;
    }
    h2 {
        font-size:21px;
    }
    .footer-inner {
        padding:22px 20px;
        align-items:flex-start;
        flex-direction:column;
        gap:10px;
    }
    .contact {
        padding:20px;
    }
    .faq summary {
        padding:19px 0;
    }
    .faq .answer {
        padding-right:12px;
    }
}
@media(max-width:360px) {
    .brand {
        gap:6px;
    }
    .brand strong {
        font-size:17px;
    }
    .nav {
        gap:12px;
    }
    .header-inner {
        padding-inline:16px;
    }
    .shell {
        padding-inline:18px;
    }
    .toc ol {
        grid-template-columns:1fr;
    }
}
@media(prefers-reduced-motion:reduce) {
    html {
        scroll-behavior:auto;
    }
    .contact {
        transition:none;
    }
}