:root {
    --page-bg: linear-gradient(180deg, #f4f8f2 0%, #eef3ea 100%);
    --card-bg: rgba(255, 255, 255, 0.92);
    --card-border: rgba(74, 103, 65, 0.16);
    --text-primary: #1f2a1f;
    --text-secondary: #4e5f4d;
    --text-muted: #6e7d6c;
    --accent: #486a44;
    --accent-soft: #dfead9;
    --shadow: 0 18px 44px rgba(44, 64, 41, 0.08);
    --radius: 20px;
    --content-width: 980px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text-primary);
    background: var(--page-bg);
    font-family: "PingFang SC", "Hiragino Sans", "Hiragino Sans GB", "Noto Sans JP", "Segoe UI", sans-serif;
    line-height: 1.72;
}

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

.lang-panel {
    display: none;
}

.legal-shell {
    width: min(calc(100% - 32px), var(--content-width));
    margin: 0 auto;
    padding: 32px 0 56px;
}

.hero {
    padding: 28px;
    border: 1px solid var(--card-border);
    border-radius: calc(var(--radius) + 4px);
    background:
        radial-gradient(circle at top right, rgba(129, 162, 113, 0.18), transparent 28%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(250, 252, 248, 0.92));
    box-shadow: var(--shadow);
}

.hero-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--text-muted);
    font-size: 0.92rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1 {
    margin: 0 0 12px;
    font-family: "Iowan Old Style", "Palatino Linotype", "Noto Serif CJK SC", serif;
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.14;
}

.hero p {
    margin: 10px 0 0;
    color: var(--text-secondary);
}

.meta-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
}

.meta-list li {
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 0.95rem;
}

.toc-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-top: 22px;
}

.toc-grid.lang-panel {
    display: none;
}

.toc-card,
.article-card {
    margin-top: 22px;
    padding: 22px 24px;
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    background: var(--card-bg);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.toc-card h2,
.article-card h2 {
    margin: 0 0 12px;
    font-size: 1.15rem;
}

.toc-card ol,
.toc-card ul,
.article-card ol,
.article-card ul {
    margin: 0;
    padding-left: 1.2rem;
}

.toc-card li,
.article-card li {
    margin: 0.4rem 0;
}

.language-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.language-tabs button {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border: 1px solid rgba(72, 106, 68, 0.22);
    border-radius: 999px;
    color: var(--accent);
    background: rgba(255, 255, 255, 0.78);
    cursor: pointer;
    font: inherit;
}

.language-tabs button.is-active {
    border-color: var(--accent);
    background: var(--accent);
    color: #fff;
}

.hero-copy {
    margin-top: 14px;
}

.hero-copy h1,
.hero-copy p {
    max-width: 760px;
}

.article-card h3 {
    margin: 24px 0 10px;
    font-size: 1.02rem;
}

.article-card p {
    margin: 0.65rem 0;
}

.article-card section + section {
    margin-top: 18px;
}

.section-divider {
    height: 1px;
    margin: 24px 0;
    border: 0;
    background: linear-gradient(90deg, transparent, rgba(72, 106, 68, 0.22), transparent);
}

.note {
    padding: 14px 16px;
    border-left: 4px solid var(--accent);
    border-radius: 12px;
    background: rgba(223, 234, 217, 0.62);
    color: var(--text-secondary);
}

.compact-list {
    display: grid;
    gap: 10px;
}

.compact-list strong {
    color: var(--text-primary);
}

.footer-card {
    margin-top: 22px;
    padding: 20px 24px;
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    background: rgba(247, 250, 244, 0.9);
    color: var(--text-secondary);
    box-shadow: var(--shadow);
}

.footer-card p {
    margin: 0.5rem 0;
}

html[data-active-lang="zh"] .lang-panel[data-lang="zh"] {
    display: block;
}

html[data-active-lang="en"] .lang-panel[data-lang="en"] {
    display: block;
}

html[data-active-lang="ja"] .lang-panel[data-lang="ja"] {
    display: block;
}

html[data-active-lang="zh"] .toc-grid.lang-panel[data-lang="zh"],
html[data-active-lang="en"] .toc-grid.lang-panel[data-lang="en"],
html[data-active-lang="ja"] .toc-grid.lang-panel[data-lang="ja"] {
    display: grid;
}

@media (max-width: 820px) {
    .legal-shell {
        width: min(calc(100% - 20px), var(--content-width));
        padding-top: 20px;
    }

    .hero,
    .toc-card,
    .article-card,
    .footer-card {
        padding: 18px;
        border-radius: 18px;
    }

    .toc-grid {
        grid-template-columns: 1fr;
    }

    .hero-top {
        flex-direction: column;
        align-items: stretch;
    }
}

@media print {
    body {
        background: #fff;
    }

    .legal-shell {
        width: 100%;
        padding: 0;
    }

    .hero,
    .toc-card,
    .article-card,
    .footer-card {
        box-shadow: none;
        background: #fff;
        border-color: #d9d9d9;
        break-inside: avoid;
    }

    .language-tabs button {
        text-decoration: underline;
        border: 0;
        padding: 0;
    }
}