:root {
    --blue-900: #0a3d62; /* 医用蓝主色深 */
    --blue-700: #126fbb;
    --blue-600: #2e86de; /* 主按钮 */
    --blue-050: #f1f7fe;
    --green-200: #d0f2e4; /* 浅绿色点缀 */
    --green-400: #5bc8a8;
    --text-900: #0f172a;
    --text-700: #334155;
    --text-500: #64748b;
    --border: #e5e7eb;
    --bg: #ffffff;
    --shadow: 0 6px 20px rgba(10,61,98,0.08);
    --radius: 14px;
}

* { box-sizing: border-box; }
html,body { margin: 0; padding: 0; }
body {
    font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;
    color: var(--text-900);
    background: var(--bg);
    line-height: 1.75; /* 宽松行高 */
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.skip-link {
    position: absolute; left: -9999px; top: auto;
}
.skip-link:focus { left: 12px; top: 12px; background: #fff; padding: 8px 12px; border-radius: 8px; box-shadow: var(--shadow); }

/* Header */
.site-header {
    position: sticky; top: 0; z-index: 1000; background: #fff; border-bottom: 1px solid var(--border);
    backdrop-filter: saturate(120%) blur(8px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo { width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, var(--blue-600), var(--blue-900)); display: grid; place-items: center; color: #fff; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-weight: 700; }
.brand-text span { font-size: 12px; color: var(--text-500); }

.site-nav ul { display: flex; list-style: none; margin: 0; padding: 0; gap: 16px; }
.site-nav a { text-decoration: none; color: var(--text-700); padding: 8px 10px; border-radius: 8px; }
.site-nav a:hover { background: var(--blue-050); color: var(--blue-900); }
.nav-toggle { display: none; }

.cta-group { display: flex; gap: 10px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 16px; border-radius: 999px; text-decoration: none; border: 1px solid transparent; cursor: pointer; font-weight: 600; }
.btn-primary { background: var(--blue-600); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--blue-700); }
.btn-outline { background: #fff; color: var(--blue-700); border-color: var(--blue-700); }
.btn-outline:hover { background: var(--blue-050); }
.btn-ghost { background: #fff; color: var(--text-700); border-color: var(--border); }
.btn-ghost:hover { background: var(--blue-050); }

.small { font-size: 13px; color: var(--text-500); }
.note { background: var(--blue-050); padding: 10px 12px; border-radius: 10px; }

/* Hero */
.hero { padding: 56px 0; background: linear-gradient(180deg, #fff, var(--blue-050)); }
.hero-inner { display: grid; grid-template-columns: 1.2fr 0.8fr; align-items: center; gap: 32px; }
.hero h1 { font-size: 34px; margin: 0 0 10px 0; color: var(--blue-900); }
.hero-ctas { display: flex; gap: 10px; margin: 16px 0; }
.trust-badges { display: flex; gap: 10px; list-style: none; padding: 0; margin: 12px 0 0 0; }
.trust-badges li { background: var(--green-200); color: var(--text-700); padding: 6px 10px; border-radius: 999px; }

.doctor-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow); display: flex; gap: 12px; align-items: center; }
.doctor-photo { width: 72px; height: 72px; border-radius: 12px; background: linear-gradient(135deg, #dfe9f3, #f5f7fa); }
.doctor-info { display: flex; flex-direction: column; }
.doctor-info strong { color: var(--text-900);} 
.doctor-info span { color: var(--text-500); font-size: 13px; }
/* Hero media */
.hero-media .hero-illus { width: 100%; height: auto; display: block; border-radius: 16px; box-shadow: var(--shadow); border: 1px solid var(--border); background: #fff; }

/* Sections */
.section { padding: 56px 0; }
.section.alt { background: #fafbff; }
.section h2 { margin: 0 0 18px 0; color: var(--blue-900); font-size: 24px; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.card h3 { margin-top: 0; color: var(--text-900); }

.brand-list { margin: 0; padding-left: 18px; }

/* Calculator */
.calculator { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.calculator label { display: grid; gap: 6px; font-weight: 600; color: var(--text-700); }
.calculator input, .calculator select, .calculator textarea { padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); font: inherit; }
.calc-actions { grid-column: 1 / -1; display: flex; gap: 10px; align-items: center; }
#calc-result { display: block; margin-top: 8px; font-weight: 700; color: var(--blue-700); }

/* Case cards */
.case-card .media { height: 140px; border-radius: 12px; background: linear-gradient(135deg, #e9f0fb, #f5fffb); margin-bottom: 10px; }

/* Hospitals */
.filters { display: flex; gap: 12px; margin-bottom: 12px; }
.hospital h3 { margin: 0 0 6px 0; }

/* Contact */
.contact .form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.contact .form label { display: grid; gap: 6px; font-weight: 600; color: var(--text-700); }
.contact .form input, .contact .form select, .contact .form textarea { padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); font: inherit; }
.contact .form .form-actions { grid-column: 1 / -1; display: flex; gap: 12px; align-items: center; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 24px 0; background: #fff; }
.footer-inner { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; }
.footer-links { display: flex; gap: 12px; justify-content: center; }
.footer-brand { color: var(--blue-900); font-weight: 700; }
.copyright { text-align: right; color: var(--text-500); }

/* Responsive */
@media (max-width: 960px) {
    .hero-inner { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: 1fr 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 8px; }
    .copyright { text-align: left; }
}
@media (max-width: 720px) {
    .site-nav ul { display: none; position: absolute; right: 12px; top: 56px; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 8px; box-shadow: var(--shadow); flex-direction: column; }
    .site-nav ul.open { display: flex; }
    .nav-toggle { display: inline-flex; align-items: center; padding: 8px 12px; border-radius: 8px; border: 1px solid var(--border); background: #fff; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .calculator { grid-template-columns: 1fr; }
    .contact .form { grid-template-columns: 1fr; }
}

/* Content article pages */
.content-article {
    max-width: 1000px;
    margin: 0 auto;
}
.content-article h2 {
    font-size: 28px;
    color: var(--blue-900);
    margin: 32px 0 16px 0;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--blue-050);
}
.content-article h3 {
    font-size: 20px;
    color: var(--text-900);
    margin: 16px 0 12px 0;
}
.content-article h4 {
    font-size: 16px;
    color: var(--text-700);
    margin: 12px 0 8px 0;
}
.content-article ul, .content-article ol {
    margin: 12px 0;
    padding-left: 24px;
}
.content-article li {
    margin: 8px 0;
    line-height: 1.8;
}
.content-article strong {
    color: var(--blue-900);
    font-weight: 600;
}
.content-article table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}
.content-article table th {
    font-weight: 600;
    color: var(--blue-900);
}
.content-article table td,
.content-article table th {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.content-article table tbody tr:hover {
    background: var(--blue-050);
}

/* Contact page form */
.form {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.form label {
    display: grid;
    gap: 6px;
    font-weight: 600;
    color: var(--text-700);
}
.form input,
.form select,
.form textarea {
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    font: inherit;
    width: 100%;
}
.form textarea {
    resize: vertical;
    min-height: 100px;
}
.form-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}
#form-msg {
    font-size: 14px;
    margin-left: 8px;
}

/* Responsive for contact page */
@media (max-width: 720px) {
    .form {
        grid-template-columns: 1fr;
    }
}