:root {
    color-scheme: light;
    --ink: #172126;
    --muted: #5d6b73;
    --line: #dfe7e8;
    --paper: #f8fbfa;
    --panel: #ffffff;
    --teal: #0b7d78;
    --teal-dark: #075d59;
    --red: #d84032;
    --gold: #b9852b;
    --mint: #e7f7f4;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "Microsoft YaHei", sans-serif;
    letter-spacing: 0;
    line-height: 1.75;
}

a {
    color: inherit;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 14px clamp(18px, 4vw, 52px);
    border-bottom: 1px solid rgba(223, 231, 232, 0.9);
    background: rgba(248, 251, 250, 0.94);
    backdrop-filter: blur(16px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    font-weight: 800;
    text-decoration: none;
}

.brand img {
    width: 34px;
    height: 34px;
    border-radius: 8px;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

.main-nav a,
.button {
    display: inline-flex;
    min-height: 36px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    padding: 0 13px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.main-nav a:hover {
    background: var(--mint);
    color: var(--teal-dark);
}

.button.primary {
    background: var(--teal);
    color: #fff;
}

.button.secondary {
    border: 1px solid rgba(11, 125, 120, 0.22);
    background: #fff;
    color: var(--teal-dark);
}

.hero {
    padding: clamp(46px, 7vw, 88px) clamp(18px, 4vw, 52px) 30px;
    border-bottom: 1px solid var(--line);
    background:
        linear-gradient(115deg, rgba(231, 247, 244, 0.96), rgba(255, 255, 255, 0.86) 46%, rgba(255, 247, 235, 0.92)),
        #fff;
}

.hero-inner,
.content,
.site-footer-inner {
    max-width: 1040px;
    margin: 0 auto;
}

.breadcrumb {
    margin-bottom: 18px;
    color: var(--muted);
    font-size: 13px;
}

.breadcrumb a {
    color: var(--teal-dark);
    font-weight: 700;
    text-decoration: none;
}

h1,
h2,
h3,
p,
ul,
ol {
    margin-top: 0;
}

h1 {
    max-width: 800px;
    margin-bottom: 18px;
    font-size: clamp(32px, 5vw, 52px);
    line-height: 1.12;
}

.lead {
    max-width: 760px;
    margin-bottom: 0;
    color: var(--muted);
    font-size: 18px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.content {
    padding: 36px clamp(18px, 4vw, 52px) 48px;
}

.notice {
    border-left: 4px solid var(--red);
    border-radius: 8px;
    margin-bottom: 26px;
    padding: 16px 18px;
    background: #fff5f3;
    color: #63352f;
}

.section {
    margin-top: 28px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    padding: clamp(20px, 3vw, 30px);
}

.section h2 {
    margin-bottom: 14px;
    font-size: 24px;
    line-height: 1.35;
}

.section h3 {
    margin: 22px 0 8px;
    font-size: 18px;
}

.section p,
.section li {
    color: #43555d;
}

.section ul,
.section ol {
    padding-left: 22px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.mini-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 16px;
    background: #fbfdfc;
}

.mini-card strong {
    display: block;
    margin-bottom: 6px;
}

.faq h3 {
    border-top: 1px solid var(--line);
    padding-top: 18px;
}

.related-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.related-links a {
    display: inline-flex;
    min-height: 34px;
    align-items: center;
    border: 1px solid rgba(11, 125, 120, 0.22);
    border-radius: 8px;
    padding: 0 12px;
    color: var(--teal-dark);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.related-links a:hover {
    background: var(--mint);
}

.site-footer {
    border-top: 1px solid var(--line);
    padding: 24px clamp(18px, 4vw, 52px);
    background: #fff;
    color: var(--muted);
    font-size: 13px;
}

.site-footer a {
    color: var(--teal-dark);
    font-weight: 700;
    text-decoration: none;
}

@media (max-width: 780px) {
    .site-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .main-nav {
        justify-content: flex-start;
    }

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