:root {
    color-scheme: light;
    --ink: #22201b;
    --ink-soft: #4a4439;
    --muted: #776d5d;
    --paper: #f3ead7;
    --paper-light: #fffaf0;
    --paper-deep: #e8d8b9;
    --line: rgba(91, 68, 34, 0.18);
    --cinnabar: #a52d25;
    --cinnabar-deep: #761d19;
    --gold: #b57a27;
    --gold-light: #d6ac63;
    --jade: #486c5c;
    --shadow: rgba(51, 37, 18, 0.12);
    --max: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 92px;
}

body {
    margin: 0;
    background:
        repeating-linear-gradient(4deg, rgba(79, 61, 34, 0.018) 0 1px, transparent 1px 8px),
        repeating-linear-gradient(94deg, rgba(255, 255, 255, 0.2) 0 1px, transparent 1px 15px),
        var(--paper);
    color: var(--ink);
    font-family: "Noto Serif SC", "Songti SC", "STSong", "PingFang SC", "Microsoft YaHei", serif;
    line-height: 1.82;
    overflow-x: hidden;
}

a {
    color: var(--cinnabar-deep);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:hover {
    color: var(--cinnabar);
}

a:focus-visible {
    outline: 2px solid var(--cinnabar);
    outline-offset: 4px;
    border-radius: 2px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid rgba(215, 174, 98, 0.28);
    background: rgba(29, 27, 23, 0.94);
    color: #f8ecd4;
    backdrop-filter: blur(14px);
}

.header-inner {
    width: min(calc(100% - 48px), var(--max));
    min-height: 68px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: inherit;
    text-decoration: none;
}

.brand img {
    width: 38px;
    height: 38px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 9px;
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.28);
}

.brand strong {
    font-size: 18px;
    letter-spacing: 0.16em;
}

.legal-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.legal-nav a {
    padding: 7px 12px;
    border: 1px solid transparent;
    border-radius: 999px;
    color: rgba(248, 236, 212, 0.72);
    font-size: 14px;
    text-decoration: none;
}

.legal-nav a:hover,
.legal-nav a[aria-current="page"] {
    border-color: rgba(215, 174, 98, 0.4);
    background: rgba(215, 174, 98, 0.1);
    color: #fff7e8;
}

.legal-hero {
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
    background:
        radial-gradient(circle at 78% 22%, rgba(181, 122, 39, 0.2), transparent 24%),
        linear-gradient(135deg, rgba(255, 250, 240, 0.92), rgba(232, 216, 185, 0.88));
}

.legal-hero::before,
.legal-hero::after {
    content: "";
    position: absolute;
    border: 1px solid rgba(82, 62, 31, 0.08);
    border-radius: 50%;
    pointer-events: none;
}

.legal-hero::before {
    width: 430px;
    height: 430px;
    right: -140px;
    top: -260px;
}

.legal-hero::after {
    width: 260px;
    height: 260px;
    right: 48px;
    top: -170px;
}

.hero-inner {
    position: relative;
    width: min(calc(100% - 48px), var(--max));
    margin: 0 auto;
    padding: 72px 0 58px;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--cinnabar);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.24em;
}

h1 {
    margin: 0;
    font-size: clamp(38px, 6vw, 66px);
    font-weight: 700;
    letter-spacing: 0.1em;
    line-height: 1.12;
}

.hero-summary {
    max-width: 760px;
    margin: 22px 0 0;
    color: var(--ink-soft);
    font-size: 17px;
}

.version-row {
    margin-top: 24px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.version-row span {
    padding: 6px 11px;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: rgba(255, 250, 240, 0.68);
    color: var(--muted);
    font-size: 13px;
}

.layout {
    width: min(calc(100% - 48px), var(--max));
    margin: 0 auto;
    padding: 44px 0 76px;
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
}

.toc {
    position: sticky;
    top: 96px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255, 250, 240, 0.7);
    box-shadow: 0 18px 44px rgba(53, 40, 21, 0.06);
}

.toc strong {
    display: block;
    margin-bottom: 12px;
    color: var(--ink-soft);
    font-size: 14px;
    letter-spacing: 0.1em;
}

.toc ol {
    margin: 0;
    padding-left: 1.35em;
    color: var(--muted);
    font-size: 13px;
}

.toc li + li {
    margin-top: 7px;
}

.toc a {
    color: inherit;
    text-decoration: none;
}

.toc a:hover {
    color: var(--cinnabar);
}

.legal-document {
    min-width: 0;
    padding: 34px clamp(22px, 5vw, 54px) 54px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(255, 250, 240, 0.88);
    box-shadow: 0 24px 68px var(--shadow);
}

.notice,
.operator-card,
.tip {
    margin: 0 0 28px;
    padding: 18px 20px;
    border-left: 4px solid var(--cinnabar);
    background: rgba(165, 45, 37, 0.06);
}

.notice strong,
.operator-card strong {
    color: var(--cinnabar-deep);
}

.operator-card {
    border-left-color: var(--gold);
    background: rgba(181, 122, 39, 0.08);
}

.operator-grid {
    margin-top: 12px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 26px;
    font-size: 14px;
}

.placeholder {
    color: var(--cinnabar-deep);
    font-weight: 700;
}

.legal-section {
    padding: 28px 0 4px;
    border-top: 1px solid var(--line);
}

.legal-section:first-of-type {
    border-top: 0;
}

.legal-section h2 {
    margin: 0 0 18px;
    color: var(--ink);
    font-size: 25px;
    line-height: 1.45;
}

.legal-section h3 {
    margin: 24px 0 10px;
    color: var(--ink-soft);
    font-size: 18px;
}

.legal-section p,
.legal-section ul,
.legal-section ol {
    margin-top: 0;
    margin-bottom: 16px;
}

.legal-section ul,
.legal-section ol {
    padding-left: 1.5em;
}

.legal-section li + li {
    margin-top: 7px;
}

.sensitive {
    color: #6f1d18;
    font-weight: 700;
}

.table-wrap {
    margin: 18px 0 24px;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.36);
}

table {
    width: 100%;
    min-width: 720px;
    border-collapse: collapse;
    font-size: 14px;
    line-height: 1.65;
}

th,
td {
    padding: 13px 15px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

th:last-child,
td:last-child {
    border-right: 0;
}

tr:last-child td {
    border-bottom: 0;
}

th {
    background: rgba(232, 216, 185, 0.58);
    color: var(--ink-soft);
    font-weight: 700;
}

.sdk-list {
    display: grid;
    gap: 16px;
    margin: 20px 0 26px;
}

.sdk-card {
    position: relative;
    padding: 20px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.38);
}

.sdk-card::after {
    content: attr(data-index);
    position: absolute;
    right: 14px;
    top: 5px;
    color: rgba(165, 45, 37, 0.07);
    font-size: 62px;
    font-weight: 700;
    line-height: 1;
}

.sdk-title {
    position: relative;
    z-index: 1;
    margin: 0 0 12px;
    padding-right: 46px;
    color: var(--ink);
    font-size: 19px;
}

.sdk-meta {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 7px 14px;
    margin: 0;
    font-size: 13px;
}

.sdk-meta dt {
    color: var(--muted);
}

.sdk-meta dd {
    min-width: 0;
    margin: 0;
    overflow-wrap: anywhere;
}

.sdk-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-weight: 700;
}

.sdk-link::after {
    content: "↗";
    font-size: 12px;
}

.tip {
    border-left-color: var(--jade);
    background: rgba(72, 108, 92, 0.07);
    color: var(--ink-soft);
}

.contact-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.contact-item {
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 9px;
    background: rgba(232, 216, 185, 0.2);
}

.contact-item small {
    display: block;
    margin-bottom: 4px;
    color: var(--muted);
}

.site-footer {
    padding: 26px 24px max(26px, env(safe-area-inset-bottom));
    border-top: 3px solid var(--cinnabar);
    background: var(--ink);
    color: rgba(248, 236, 212, 0.68);
    font-size: 13px;
    text-align: center;
}

.site-footer p {
    margin: 0;
}

.site-footer p + p {
    margin-top: 8px;
}

.site-footer a {
    color: rgba(248, 236, 212, 0.82);
}

@media (max-width: 900px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .toc {
        position: static;
    }

    .toc ol {
        columns: 2;
        column-gap: 32px;
    }
}

@media (max-width: 640px) {
    html {
        scroll-padding-top: 76px;
    }

    .header-inner,
    .hero-inner,
    .layout {
        width: min(calc(100% - 28px), var(--max));
    }

    .header-inner {
        min-height: 60px;
        gap: 12px;
    }

    .brand strong {
        display: none;
    }

    .brand img {
        width: 34px;
        height: 34px;
    }

    .legal-nav {
        gap: 2px;
    }

    .legal-nav a {
        padding: 6px 8px;
        font-size: 12px;
    }

    .hero-inner {
        padding: 46px 0 38px;
    }

    h1 {
        font-size: 39px;
        letter-spacing: 0.06em;
    }

    .hero-summary {
        font-size: 15px;
    }

    .layout {
        padding: 24px 0 48px;
        gap: 18px;
    }

    .toc {
        padding: 18px;
    }

    .toc ol {
        columns: 1;
    }

    .legal-document {
        padding: 24px 18px 36px;
        border-radius: 12px;
    }

    .operator-grid,
    .contact-list {
        grid-template-columns: 1fr;
    }

    .legal-section h2 {
        font-size: 22px;
    }

    .sdk-card {
        padding: 18px 16px;
    }

    .sdk-meta {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .sdk-meta dd + dt {
        margin-top: 7px;
    }
}

@media print {
    body {
        background: #fff;
        font-size: 11pt;
    }

    .site-header,
    .toc,
    .site-footer {
        display: none;
    }

    .legal-hero {
        background: none;
    }

    .hero-inner,
    .layout {
        width: 100%;
        padding-left: 0;
        padding-right: 0;
    }

    .layout {
        display: block;
    }

    .legal-document {
        padding: 0;
        border: 0;
        box-shadow: none;
    }

    .sdk-card,
    .legal-section {
        break-inside: avoid;
    }
}