:root {
    --primary: #0056cc;
    --primary-light: #007aff;
    --accent: #00a8e8;
    --text-main: #202124;
    --text-sub: #5f6368;
    --bg-soft: #f6f8fb;
    --white: #ffffff;
    --border: #e3e7ed;
    --warning-bg: #fff8e8;
    --warning-border: #efb33d;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg-soft);
    color: var(--text-main);
    font-family: "Inter", "PingFang SC", "HarmonyOS Sans", sans-serif;
    font-size: 16px;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
}

body.dada {
    --primary: #6b48d7;
    --primary-light: #8668e8;
    --accent: #7a5bdd;
}

a {
    color: var(--primary);
}

.container {
    width: min(960px, calc(100% - 48px));
    margin: 0 auto;
}

.site-header {
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(16px);
}

.header-content {
    display: flex;
    height: 100%;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    color: var(--primary);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-decoration: none;
}

.header-nav {
    display: flex;
    gap: 20px;
    font-size: 14px;
}

.header-nav a {
    color: var(--text-sub);
    text-decoration: none;
}

.header-nav a:hover {
    color: var(--primary);
}

.legal-hero {
    padding: 76px 0 54px;
    background: linear-gradient(145deg, #eef6ff, #ffffff);
    border-bottom: 1px solid var(--border);
}

.dada .legal-hero {
    background: linear-gradient(145deg, #f2edff, #ffffff);
}

.app-label {
    display: inline-block;
    margin-bottom: 12px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.5px;
}

h1 {
    margin-bottom: 14px;
    color: var(--primary);
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.3;
}

.legal-meta {
    color: var(--text-sub);
    font-size: 14px;
}

.legal-document {
    margin: 42px auto 70px;
    padding: 56px 64px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 14px 45px rgba(19, 50, 90, 0.06);
}

.lead {
    color: #3c4043;
    font-size: 17px;
}

.notice {
    margin: 26px 0;
    padding: 20px 22px;
    background: var(--bg-soft);
    border-left: 4px solid var(--accent);
    border-radius: 4px;
}

.notice-warning {
    background: var(--warning-bg);
    border-left-color: var(--warning-border);
}

.legal-document section {
    padding-top: 34px;
}

.legal-document h2 {
    margin-bottom: 14px;
    color: var(--primary);
    font-size: 1.35rem;
    line-height: 1.45;
}

.legal-document h3 {
    margin: 22px 0 8px;
    font-size: 1.02rem;
}

.legal-document p + p {
    margin-top: 12px;
}

.legal-document ul,
.legal-document ol {
    margin: 10px 0 0 24px;
}

.legal-document li + li {
    margin-top: 8px;
}

.data-table-wrap {
    margin-top: 18px;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    min-width: 680px;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th,
.data-table td {
    padding: 13px 14px;
    border: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.data-table th {
    background: var(--bg-soft);
    color: var(--primary);
}

.sdk-intro {
    margin: 18px 0 22px;
    padding: 18px 20px;
    background: var(--bg-soft);
    border-radius: 8px;
    color: var(--text-sub);
    font-size: 14px;
}

.sdk-list {
    display: grid;
    gap: 18px;
    margin-top: 20px;
}

.sdk-card {
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--white);
}

.sdk-card h3 {
    margin: 6px 0 18px;
    color: var(--primary);
    font-size: 1.15rem;
}

.sdk-type {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 20px;
    background: var(--bg-soft);
    color: var(--accent);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.sdk-details {
    display: grid;
    gap: 13px;
    font-size: 14px;
}

.sdk-details > div {
    display: grid;
    grid-template-columns: 104px 1fr;
    gap: 14px;
}

.sdk-details dt {
    color: var(--text-main);
    font-weight: 700;
}

.sdk-details dd {
    color: var(--text-sub);
}

.sdk-details a {
    overflow-wrap: anywhere;
}

.contact-card {
    margin-top: 18px;
    padding: 20px 22px;
    background: var(--bg-soft);
    border-radius: 8px;
}

footer {
    padding: 48px 0;
    background: #121212;
    color: #888;
    font-size: 13px;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.footer-brand {
    color: #bbb;
    font-weight: 600;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links a {
    color: #aaa;
}

.footer-links a:hover {
    color: #fff;
}

@media (max-width: 680px) {
    .container {
        width: min(100% - 32px, 960px);
    }

    .logo {
        font-size: 15px;
    }

    .header-nav a:first-child {
        display: none;
    }

    .legal-hero {
        padding: 58px 0 42px;
    }

    .legal-document {
        margin-top: 24px;
        padding: 34px 22px;
        border-radius: 10px;
    }

    .footer-content {
        align-items: flex-start;
        flex-direction: column;
    }
}