:root {
    --color-bg: #f3efe4;
    --color-surface: rgba(255, 252, 245, 0.9);
    --color-surface-strong: #fffaf0;
    --color-text: #14211b;
    --color-muted: #516157;
    --color-border: rgba(20, 33, 27, 0.12);
    --color-accent: #1f5c48;
    --color-accent-soft: #dceae4;
    --color-warm: #c76728;
    --shadow-card: 0 18px 60px rgba(20, 33, 27, 0.08);
    --radius-lg: 24px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --font-display: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, ui-serif, serif;
    --font-body: "Avenir Next", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background:
        radial-gradient(circle at top left, rgba(199, 103, 40, 0.12), transparent 28rem),
        radial-gradient(circle at right 20%, rgba(31, 92, 72, 0.14), transparent 24rem),
        linear-gradient(180deg, #faf5e8 0%, #f0ebde 100%);
}

body {
    margin: 0;
    color: var(--color-text);
    font-family: var(--font-body);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: inherit;
}

.shell {
    width: min(1120px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 1.25rem 0 3rem;
}

.site-header,
.site-footer,
.card,
.button,
.link-card,
.faq-item {
    animation: rise-in 0.55s ease both;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.5rem 0 1.5rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    text-decoration: none;
}

.brand__mark {
    width: 3rem;
    height: 3rem;
}

.brand__title {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 2vw, 2rem);
    line-height: 1.1;
}

.eyebrow,
.section-label {
    margin: 0 0 0.6rem;
    color: var(--color-muted);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-size: 0.74rem;
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.site-nav__link {
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 0.55rem 0.95rem;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.55);
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link.is-active {
    background: var(--color-accent-soft);
    border-color: rgba(31, 92, 72, 0.24);
    transform: translateY(-1px);
}

.page {
    display: grid;
    gap: 1rem;
}

.hero,
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(18px);
}

.card {
    padding: 1.5rem;
}

.hero {
    padding: clamp(1.4rem, 2vw, 2.2rem);
}

.hero__title,
.card h2 {
    margin: 0 0 0.75rem;
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.5rem);
    line-height: 0.96;
}

.page .card h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    line-height: 1.05;
}

.hero__summary {
    max-width: 44rem;
    margin: 0 0 1.4rem;
    color: var(--color-muted);
    font-size: 1.05rem;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-bottom: 1.4rem;
}

.button,
.link-card {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    border-radius: var(--radius-md);
    padding: 1rem 1.1rem;
    text-decoration: none;
    border: 1px solid var(--color-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.button:hover,
.button:focus-visible,
.link-card:hover,
.link-card:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(20, 33, 27, 0.12);
}

.button--primary {
    min-width: min(100%, 20rem);
    background: linear-gradient(135deg, #1f5c48, #274a61);
    color: #f8f4ea;
    border-color: transparent;
}

.button--secondary {
    min-width: min(100%, 18rem);
    background: var(--color-surface-strong);
}

.link-card {
    background: rgba(255, 255, 255, 0.65);
}

.button strong,
.link-card strong {
    font-size: 1rem;
    word-break: break-word;
}

.hero__meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
    gap: 1rem;
    margin: 0;
}

.hero__meta dt {
    color: var(--color-muted);
    font-size: 0.84rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero__meta dd {
    margin: 0.3rem 0 0;
    font-weight: 700;
    word-break: break-word;
}

.entry-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.stack {
    display: grid;
    gap: 0.8rem;
}

.stack--compact {
    margin-top: 1rem;
}

.card__split {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.2rem;
}

.bullet-list {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--color-muted);
}

.bullet-list li + li {
    margin-top: 0.55rem;
}

.status-banner {
    margin: 0 0 1rem;
    padding: 0.9rem 1rem;
    border-radius: var(--radius-md);
    background: var(--color-accent-soft);
    border: 1px solid rgba(31, 92, 72, 0.2);
    font-weight: 700;
}

.faq-list {
    display: grid;
    gap: 0.8rem;
}

.faq-item {
    background: rgba(255, 255, 255, 0.72);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    padding: 0.95rem 1rem;
}

.faq-item summary {
    cursor: pointer;
    font-weight: 700;
    list-style: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item p {
    margin: 0.75rem 0 0;
    color: var(--color-muted);
}

.inline-alert {
    margin-top: 1rem;
    border-radius: var(--radius-sm);
    padding: 0.85rem 1rem;
    background: rgba(199, 103, 40, 0.12);
    border: 1px solid rgba(199, 103, 40, 0.18);
}

.is-hidden {
    display: none;
}

.site-footer {
    margin-top: 1.25rem;
    padding: 1.2rem 0 0;
    color: var(--color-muted);
    text-align: center;
}

.site-footer p {
    margin: 0.25rem 0;
}

.site-footer a {
    color: var(--color-accent);
}

@keyframes rise-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 920px) {
    .site-header,
    .card__split,
    .entry-grid {
        grid-template-columns: 1fr;
    }

    .site-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .shell {
        width: min(100% - 1rem, 100%);
        padding-bottom: 2rem;
    }

    .card,
    .hero {
        padding: 1.1rem;
        border-radius: 1.1rem;
    }

    .hero__actions,
    .site-nav {
        width: 100%;
    }

    .button,
    .link-card {
        width: 100%;
    }

    .site-nav__link {
        flex: 1 1 calc(50% - 0.5rem);
        text-align: center;
    }
}