:root {
    color-scheme: light;
    --bg: #f6fbf7;
    --surface: #ffffff;
    --surface-soft: #eaf7ee;
    --ink: #132018;
    --muted: #607367;
    --primary: #15803d;
    --primary-strong: #0f6b32;
    --primary-soft: #d9f4e2;
    --line: #d9e8de;
    --shadow: 0 22px 60px rgba(20, 83, 45, 0.12);
    --radius: 8px;
    font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at 18% 10%, rgba(34, 197, 94, 0.12), transparent 28rem),
        linear-gradient(180deg, #f1faf3 0%, var(--bg) 42%, #ffffff 100%);
    line-height: 1.6;
}

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

img {
    display: block;
    max-width: 100%;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    width: 100%;
    padding: 16px clamp(18px, 5vw, 72px);
    border-bottom: 1px solid rgba(217, 232, 222, 0.78);
    background: rgba(246, 251, 247, 0.88);
    backdrop-filter: blur(18px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-mark {
    display: grid;
    flex: 0 0 auto;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: 50%;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), #34a853);
    box-shadow: 0 10px 24px rgba(21, 128, 61, 0.24);
    font-weight: 800;
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    font-size: 18px;
    line-height: 1.2;
}

.brand small {
    color: var(--muted);
    font-size: 12px;
    letter-spacing: 0;
}

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

.site-nav a {
    border-radius: 999px;
    padding: 8px 14px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
}

.site-nav a:hover,
.site-nav a:focus-visible {
    color: var(--primary-strong);
    background: var(--primary-soft);
    outline: none;
}

main {
    width: min(1120px, calc(100% - 36px));
    margin: 0 auto;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.78fr);
    align-items: center;
    gap: clamp(28px, 6vw, 72px);
    min-height: calc(100vh - 154px);
    padding: clamp(42px, 7vw, 88px) 0 36px;
}

.hero-copy {
    max-width: 680px;
}

.eyebrow,
.section-kicker {
    margin: 0 0 10px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.18;
}

h1 {
    max-width: 9em;
    font-size: clamp(42px, 7vw, 76px);
    letter-spacing: 0;
}

.hero-text {
    max-width: 620px;
    margin: 22px 0 0;
    color: var(--muted);
    font-size: 18px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 10px 18px;
    font-weight: 800;
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button.primary {
    color: #ffffff;
    background: var(--primary);
    box-shadow: 0 14px 28px rgba(21, 128, 61, 0.22);
}

.button.primary:hover {
    background: var(--primary-strong);
}

.button.secondary {
    color: var(--primary-strong);
    border-color: var(--line);
    background: rgba(255, 255, 255, 0.72);
}

.hero-visual {
    position: relative;
    margin: 0;
    overflow: hidden;
    border: 1px solid rgba(217, 232, 222, 0.92);
    border-radius: var(--radius);
    background: #ffffff;
    box-shadow: var(--shadow);
}

.hero-visual::after {
    position: absolute;
    inset: auto 22px 22px;
    height: 6px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--primary), #86efac, #facc15);
    content: "";
}

.section {
    padding: clamp(48px, 8vw, 86px) 0;
}

.intro {
    display: grid;
    grid-template-columns: minmax(220px, 0.8fr) minmax(280px, 1.2fr);
    gap: clamp(20px, 5vw, 70px);
    border-top: 1px solid var(--line);
}

.intro p:last-child {
    margin: 0;
    color: var(--muted);
    font-size: 18px;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 24px;
}

.section-heading > p {
    max-width: 280px;
    margin: 0;
    color: var(--muted);
    text-align: right;
}

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

.post-card {
    display: grid;
    min-height: 260px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
    background: rgba(255, 255, 255, 0.86);
    box-shadow: 0 12px 38px rgba(20, 83, 45, 0.08);
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.post-card:hover,
.post-card:focus-visible {
    border-color: rgba(21, 128, 61, 0.35);
    box-shadow: var(--shadow);
    transform: translateY(-3px);
    outline: none;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
    color: var(--primary-strong);
    font-size: 13px;
    font-weight: 800;
}

.post-card h3 {
    font-size: clamp(22px, 3vw, 30px);
}

.post-card p {
    margin: 16px 0 0;
    color: var(--muted);
}

.post-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 28px;
    color: var(--primary);
    font-weight: 800;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
}

.tag {
    border-radius: 999px;
    padding: 5px 10px;
    color: var(--primary-strong);
    background: var(--primary-soft);
    font-size: 12px;
    font-weight: 800;
}

.reader {
    border-top: 1px solid var(--line);
}

.back-link {
    display: inline-flex;
    margin-bottom: 22px;
    color: var(--primary);
    font-weight: 800;
}

.markdown-body {
    max-width: 820px;
    margin: 0 auto;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: clamp(24px, 5vw, 56px);
    background: #ffffff;
    box-shadow: var(--shadow);
}

.markdown-body h1 {
    max-width: 100%;
    margin-bottom: 14px;
    font-size: clamp(32px, 5vw, 52px);
}

.markdown-body h2 {
    margin-top: 36px;
    font-size: 26px;
}

.markdown-body h3 {
    margin-top: 28px;
    font-size: 20px;
}

.markdown-body p,
.markdown-body li {
    color: #314238;
    font-size: 17px;
}

.markdown-body p {
    margin: 16px 0;
}

.markdown-body ul,
.markdown-body ol {
    padding-left: 1.4em;
}

.markdown-body blockquote {
    margin: 24px 0;
    border-left: 4px solid var(--primary);
    border-radius: var(--radius);
    padding: 14px 18px;
    color: var(--muted);
    background: var(--surface-soft);
}

.markdown-body code {
    border-radius: 5px;
    padding: 2px 6px;
    color: var(--primary-strong);
    background: var(--primary-soft);
    font-family: "SFMono-Regular", Consolas, monospace;
}

.markdown-body hr {
    height: 1px;
    margin: 34px 0;
    border: 0;
    background: var(--line);
}

.site-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    width: min(1120px, calc(100% - 36px));
    margin: 36px auto 0;
    border-top: 1px solid var(--line);
    padding: 24px 0 34px;
    color: var(--muted);
    font-size: 14px;
}

.site-footer p {
    margin: 0;
}

.beian a {
    color: var(--primary-strong);
    font-weight: 700;
}

@media (max-width: 820px) {
    .site-header {
        align-items: flex-start;
        padding: 14px 18px;
    }

    .site-nav {
        flex: 0 0 auto;
    }

    .site-nav a {
        padding: 8px 10px;
    }

    main,
    .site-footer {
        width: min(100% - 28px, 680px);
    }

    .hero {
        grid-template-columns: 1fr;
        min-height: auto;
        padding-top: 34px;
    }

    .hero-visual {
        max-width: 520px;
    }

    .intro,
    .post-grid {
        grid-template-columns: 1fr;
    }

    .section-heading {
        display: block;
    }

    .section-heading > p {
        max-width: 100%;
        margin-top: 10px;
        text-align: left;
    }

    .post-card {
        min-height: auto;
    }
}

@media (max-width: 520px) {
    .site-header {
        flex-direction: column;
        gap: 12px;
    }

    .site-nav {
        width: 100%;
    }

    .site-nav a {
        flex: 1;
        text-align: center;
    }

    h1 {
        font-size: 42px;
    }

    .hero-text,
    .intro p:last-child {
        font-size: 16px;
    }

    .button {
        width: 100%;
    }

    .markdown-body {
        padding: 22px 18px;
    }

    .site-footer {
        display: block;
    }

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