:root {
    --medical-ink: #20342f;
    --medical-muted: #6f827d;
    --medical-soft: #edf4f1;
    --medical-paper: #f8fbf9;
    --medical-card: #ffffff;
    --medical-line: #dbe8e3;
    --medical-accent: #3f8c78;
    --medical-accent-dark: #2e6d5d;
    --medical-shadow: 0 18px 50px rgba(44, 86, 72, .08);
    font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--medical-ink);
    background: var(--medical-paper);
}

:root[data-theme="dark"] {
    --medical-ink: #e5f0eb;
    --medical-muted: #a3b9b1;
    --medical-soft: #233a34;
    --medical-paper: #15231f;
    --medical-card: #1c302a;
    --medical-line: #365149;
    --medical-accent: #8bd2b8;
    --medical-accent-dark: #b6ead7;
    --medical-shadow: 0 18px 50px rgba(0, 0, 0, .18);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    min-width: 320px;
    margin: 0;
    color: var(--medical-ink);
    background: var(--medical-paper);
    line-height: 1.7;
    transition: color .2s ease, background .2s ease;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--medical-accent-dark); }

button { font: inherit; }

.site-header {
    position: sticky;
    z-index: 10;
    top: 0;
    border-bottom: 1px solid var(--medical-line);
    background: color-mix(in srgb, var(--medical-paper) 90%, transparent);
    backdrop-filter: blur(16px);
}

.nav-shell,
.site-main,
.footer-inner {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.nav-shell {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 72px;
    gap: 32px;
}

.site-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: .05em;
    white-space: nowrap;
}

.site-logo-mark {
    display: grid;
    width: 30px;
    height: 30px;
    place-items: center;
    border-radius: 50%;
    color: #fff;
    background: var(--medical-accent);
    font-size: 1.45rem;
    line-height: 1;
}

.desktop-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-left: auto;
    color: var(--medical-muted);
    font-size: .9rem;
}

.desktop-nav a:hover,
.footer-nav a:hover { color: var(--medical-accent-dark); }

.nav-actions { display: flex; gap: 4px; }

.icon-button {
    display: grid;
    width: 38px;
    height: 38px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    color: var(--medical-muted);
    background: transparent;
    cursor: pointer;
    place-items: center;
    transition: background .2s ease, color .2s ease;
}

.icon-button:hover { color: var(--medical-accent-dark); background: var(--medical-soft); }
.menu-toggle { display: none; }

.mobile-nav {
    display: none;
    position: absolute;
    top: 64px;
    right: 0;
    left: 0;
    padding: 12px;
    border: 1px solid var(--medical-line);
    border-radius: 16px;
    background: var(--medical-card);
    box-shadow: var(--medical-shadow);
}

.mobile-nav a { display: block; padding: 9px 12px; color: var(--medical-muted); }
.mobile-nav.is-open { display: block; }

.site-main { padding: 34px 0 80px; }

.hero {
    position: relative;
    min-height: 360px;
    overflow: hidden;
    border-radius: 28px;
    background: var(--medical-accent-dark);
    box-shadow: var(--medical-shadow);
}

.hero-image {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(25, 62, 51, .88), rgba(31, 91, 72, .22)), url("../img/banner.jpg") center / cover;
    opacity: .95;
}

.hero-content {
    position: relative;
    display: flex;
    min-height: 360px;
    max-width: 660px;
    padding: 56px;
    flex-direction: column;
    justify-content: center;
    color: #fff;
}

.hero h1 { max-width: 600px; margin: 8px 0 10px; font-size: clamp(2.3rem, 6vw, 5.5rem); line-height: 1.05; letter-spacing: -.07em; }
.hero p:not(.eyebrow) { max-width: 520px; margin: 0; color: rgba(255, 255, 255, .8); }
.eyebrow { margin: 0; color: var(--medical-accent); font-size: .7rem; font-weight: 800; letter-spacing: .2em; }
.hero .eyebrow { color: #bce9d7; }

.post-section { max-width: 900px; margin: 76px auto 0; }
.section-heading { display: flex; align-items: end; gap: 24px; margin-bottom: 28px; }
.section-heading h1,
.section-heading h2 { margin: 4px 0 0; font-size: clamp(1.7rem, 4vw, 2.6rem); letter-spacing: -.05em; line-height: 1.15; }
.section-rule { height: 1px; margin-bottom: 9px; flex: 1; background: var(--medical-line); }

.post-list { display: grid; gap: 16px; }

.post-card {
    display: flex;
    min-height: 196px;
    padding: 28px 32px;
    border: 1px solid var(--medical-line);
    border-radius: 20px;
    background: var(--medical-card);
    box-shadow: 0 8px 28px rgba(44, 86, 72, .03);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.post-card:hover { border-color: rgba(63, 140, 120, .45); box-shadow: var(--medical-shadow); transform: translateY(-3px); }
.post-card-main { min-width: 0; flex: 1; }
.post-card h2, .post-card h3 { margin: 7px 0 8px; font-size: clamp(1.25rem, 2.4vw, 1.7rem); line-height: 1.3; letter-spacing: -.04em; }
.post-card h2 a:hover, .post-card h3 a:hover { color: var(--medical-accent); }
.post-meta, .article-meta { display: flex; align-items: center; gap: 9px; margin: 0; color: var(--medical-muted); font-size: .78rem; }
.meta-dot { color: var(--medical-accent); font-weight: 800; }
.post-excerpt { max-width: 680px; margin: 0; color: var(--medical-muted); font-size: .92rem; }
.read-more { display: inline-block; margin-top: 16px; color: var(--medical-accent-dark); font-size: .82rem; font-weight: 800; }
.read-more span { display: inline-block; margin-left: 5px; transition: transform .2s ease; }
.read-more:hover span { transform: translateX(4px); }
.post-card-number { align-self: end; color: var(--medical-line); font-size: 3.5rem; font-weight: 800; line-height: 1; }
.empty-state { padding: 40px; border: 1px dashed var(--medical-line); border-radius: 18px; color: var(--medical-muted); text-align: center; }

.pagination { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 30px; color: var(--medical-muted); font-size: .85rem; }
.pagination a { padding: 8px 14px; border: 1px solid var(--medical-line); border-radius: 99px; background: var(--medical-card); }
.pagination a:hover { border-color: var(--medical-accent); color: var(--medical-accent-dark); }

.article-page { max-width: 820px; margin: 30px auto 0; }
.article-header { margin-bottom: 38px; padding-bottom: 26px; border-bottom: 1px solid var(--medical-line); }
.article-header h1 { margin: 9px 0 12px; font-size: clamp(2rem, 5vw, 3.7rem); letter-spacing: -.07em; line-height: 1.14; }
.article-toc { margin: 0 0 34px; padding: 20px 24px; border-left: 3px solid var(--medical-accent); border-radius: 0 14px 14px 0; background: var(--medical-soft); }
.toc-title { margin: 0 0 8px; color: var(--medical-accent-dark); font-weight: 800; }
.article-toc nav > ul { margin: 0; padding-left: 20px; }
.article-toc ul { color: var(--medical-muted); font-size: .9rem; }

.article-content { font-size: 1.05rem; line-height: 1.95; }
.article-content h2, .article-content h3, .article-content h4 { margin: 2em 0 .65em; color: var(--medical-ink); line-height: 1.3; }
.article-content h2 { font-size: 1.8rem; }
.article-content h3 { font-size: 1.45rem; }
.article-content p { margin: 1.25em 0; }
.article-content a { color: var(--medical-accent-dark); text-decoration: underline; text-decoration-color: rgba(63, 140, 120, .35); text-underline-offset: 3px; }
.article-content img { display: block; max-width: 100%; height: auto; margin: 1.5em auto; border-radius: 14px; }
.article-content blockquote { margin: 1.5em 0; padding: 12px 20px; border-left: 4px solid var(--medical-accent); color: var(--medical-muted); background: var(--medical-soft); }
.article-content pre { overflow-x: auto; padding: 20px; border-radius: 14px; color: #e5f0eb; background: #1d302a; font-size: .88rem; line-height: 1.6; }
.article-content code { padding: .16em .35em; border-radius: 5px; background: var(--medical-soft); font-size: .88em; }
.article-content pre code { padding: 0; background: transparent; }
.article-content table { display: block; overflow-x: auto; width: 100%; border-collapse: collapse; }
.article-content th, .article-content td { padding: 9px 12px; border: 1px solid var(--medical-line); text-align: left; }
.article-content th { background: var(--medical-soft); }
.article-footer { display: grid; gap: 10px; margin-top: 42px; padding-top: 24px; border-top: 1px solid var(--medical-line); }
.taxonomy-row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; color: var(--medical-muted); font-size: .85rem; }
.taxonomy-row > span { width: 40px; color: var(--medical-accent-dark); font-weight: 800; }
.taxonomy-row a { padding: 4px 10px; border: 1px solid var(--medical-line); border-radius: 99px; background: var(--medical-card); }
.taxonomy-row a:hover { border-color: var(--medical-accent); }

.site-footer { border-top: 1px solid var(--medical-line); color: var(--medical-muted); }
.footer-inner { display: flex; min-height: 104px; align-items: center; gap: 22px; font-size: .8rem; }
.footer-separator { margin: 0 8px; color: var(--medical-accent); }
.footer-nav { display: flex; gap: 16px; margin-left: auto; }
.back-to-top { padding: 6px 0; border: 0; color: var(--medical-accent-dark); background: transparent; cursor: pointer; font-size: .8rem; }

@media (max-width: 720px) {
    .nav-shell, .site-main, .footer-inner { width: min(100% - 28px, 1120px); }
    .nav-shell { min-height: 64px; gap: 10px; }
    .desktop-nav { display: none; }
    .menu-toggle { display: grid; }
    .site-main { padding-top: 18px; padding-bottom: 52px; }
    .hero, .hero-content { min-height: 300px; }
    .hero-content { padding: 32px 24px; }
    .hero h1 { font-size: clamp(2.1rem, 12vw, 4rem); }
    .post-section { margin-top: 50px; }
    .post-card { min-height: 0; padding: 22px; }
    .post-card-number { display: none; }
    .section-heading { gap: 14px; }
    .section-rule { min-width: 24px; }
    .article-page { margin-top: 20px; }
    .article-content { font-size: 1rem; }
    .footer-inner { min-height: 120px; padding: 20px 0; align-items: flex-start; flex-wrap: wrap; }
    .footer-nav { order: 3; width: 100%; margin-left: 0; }
    .back-to-top { margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}