:root {
    --bg: #ffffff;
    --bg-soft: #f5f6f8;
    --ink: #15181d;
    --ink-soft: #6c737f;
    --line: #e8eaee;
    --brand: #a8d8ea;
    --brand-deep: #7fbfd9;
    --shadow: 0 18px 40px rgba(15, 23, 32, 0.04);
    --radius-lg: 28px;
    --radius-md: 18px;
    --content-width: 1120px;
    --article-width: 860px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background: var(--bg);
    color: var(--ink);
    font-family: "Avenir Next", "PingFang SC", "Helvetica Neue", sans-serif;
    line-height: 1.75;
}

h1,
h2,
h3 {
    font-weight: 600;
    line-height: 1.12;
    letter-spacing: -0.03em;
}

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

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

.container {
    width: min(calc(100% - 40px), var(--content-width));
    margin: 0 auto;
}

.site-header {
    border-bottom: 1px solid var(--line);
    background: #ffffff;
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 84px;
}

.brand {
    display: inline-flex;
    align-items: center;
}

.brand img {
    width: auto;
    height: 34px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    color: var(--ink-soft);
    font-size: 0.94rem;
}

.nav-links a:hover {
    color: var(--ink);
}

.hero {
    padding: 88px 0 104px;
}

.eyebrow,
.section-label {
    display: inline-block;
    font-size: 0.82rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-soft);
}

.hero h1 {
    max-width: 10ch;
    margin: 18px 0 18px;
    font-size: clamp(3rem, 7vw, 6.2rem);
}

.hero-lead,
.article-lead,
.contact-copy p,
.intro-card p,
.service-card p,
.article-copy p,
.contact-item p,
.faq-block p,
.article-content p {
    color: var(--ink-soft);
}

.hero-lead {
    max-width: 700px;
    font-size: 1.14rem;
}

.action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    font-weight: 600;
    border: 1px solid transparent;
    transition: transform 0.2s ease;
}

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

.button-primary {
    background: var(--ink);
    color: #ffffff;
}

.button-secondary {
    border-color: var(--line);
    background: #ffffff;
    color: var(--ink);
}

.section {
    padding: 88px 0;
}

.section-tight {
    padding-top: 72px;
}

.section-soft {
    background: var(--bg-soft);
}

.section-heading {
    max-width: 760px;
    margin: 0 auto 34px;
    text-align: center;
}

.section-heading-left {
    margin-left: 0;
    text-align: left;
}

.section-heading h2,
.contact-copy h2 {
    margin-top: 14px;
    font-size: clamp(2rem, 4vw, 3.4rem);
}

.intro-grid,
.service-grid,
.article-grid,
.contact-grid {
    display: grid;
    gap: 18px;
}

.intro-grid {
    grid-template-columns: repeat(3, 1fr);
}

.intro-card,
.service-card,
.article-card,
.contact-card,
.content-note,
.faq-block {
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.intro-card,
.service-card {
    padding: 28px;
}

.intro-card h3,
.service-card h3,
.contact-item h3,
.article-copy h3,
.content-note h3,
.faq-block h3 {
    margin-bottom: 10px;
    font-size: 1.24rem;
}

.service-grid {
    grid-template-columns: repeat(3, 1fr);
}

.service-card span {
    display: inline-block;
    margin-bottom: 12px;
    color: rgba(21, 24, 29, 0.34);
    font-size: 0.82rem;
    letter-spacing: 0.12em;
}

.article-grid {
    grid-template-columns: repeat(2, 1fr);
}

.article-card {
    overflow: hidden;
}

.article-card img {
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

.article-copy {
    padding: 24px;
}

.contact-card {
    padding: 34px;
}

.contact-grid {
    grid-template-columns: repeat(3, 1fr);
    margin: 30px 0;
}

.contact-item {
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--bg-soft);
}

.contact-item a {
    color: var(--ink);
    font-weight: 600;
}

.site-footer {
    padding: 28px 0 40px;
    border-top: 1px solid var(--line);
    background: #ffffff;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.footer-inner img {
    width: auto;
    height: 30px;
}

.footer-inner p {
    color: var(--ink-soft);
    font-size: 0.92rem;
}

.article-shell {
    padding: 48px 0 88px;
}

.article-container {
    width: min(calc(100% - 40px), var(--article-width));
    margin: 0 auto;
}

.breadcrumb {
    color: var(--ink-soft);
    font-size: 0.92rem;
}

.article-header {
    margin-top: 26px;
}

.article-header h1 {
    margin: 14px 0 14px;
    font-size: clamp(2.5rem, 5vw, 4.4rem);
}

.meta {
    color: var(--ink-soft);
    font-size: 0.95rem;
}

.article-lead {
    max-width: 760px;
    margin-top: 18px;
    font-size: 1.06rem;
}

.article-image {
    margin-top: 34px;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
}

.article-image img {
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

.article-content {
    display: grid;
    gap: 24px;
    margin-top: 34px;
}

.content-note {
    padding: 26px 28px;
}

.content-note-soft {
    background: var(--bg-soft);
}

.article-content h2,
.faq-block h2 {
    margin-bottom: 16px;
    font-size: 1.9rem;
}

.article-content h3 {
    margin: 22px 0 10px;
    font-size: 1.22rem;
}

.article-content ul,
.content-note ul,
.faq-block ul {
    padding-left: 18px;
    color: var(--ink-soft);
}

.article-content li + li,
.content-note li + li,
.faq-block li + li {
    margin-top: 8px;
}

.faq-block {
    padding: 28px;
}

.related-reading {
    margin-top: 72px;
}

.text-link {
    display: inline-block;
    margin-top: 8px;
    color: var(--ink);
    font-weight: 600;
}

.text-link::after {
    content: " ->";
}

@media (max-width: 980px) {
    .intro-grid,
    .service-grid,
    .article-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        max-width: none;
    }
}

@media (max-width: 720px) {
    .container,
    .article-container {
        width: min(calc(100% - 24px), var(--content-width));
    }

    .site-nav {
        min-height: auto;
        padding: 18px 0;
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-links {
        flex-wrap: wrap;
        gap: 16px;
    }

    .hero {
        padding: 56px 0 72px;
    }

    .hero h1,
    .article-header h1 {
        font-size: 2.3rem;
    }

    .section-heading h2,
    .contact-copy h2,
    .article-content h2,
    .faq-block h2 {
        font-size: 1.7rem;
    }

    .intro-card,
    .service-card,
    .contact-card,
    .content-note,
    .faq-block,
    .article-copy {
        padding: 22px;
    }

    .button {
        width: 100%;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}