:root {
    --canvas: #f7f7f4;
    --canvas-soft: #fafaf7;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --ink: #26251e;
    --body: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --primary: #f54e00;
    --primary-active: #d04200;
    --on-primary: #ffffff;
    --semantic-success: #1f8a65;
    --semantic-error: #cf2d56;
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-pill: 9999px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--canvas);
    color: var(--body);
    font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--ink);
    text-decoration: underline;
    text-decoration-color: var(--hairline-strong);
    text-underline-offset: 3px;
    transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

a:hover {
    color: var(--primary);
    text-decoration-color: var(--primary);
}

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

ul, ol {
    list-style: none;
}

h1, h2, h3, h4 {
    color: var(--ink);
    font-weight: 400;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h1 { font-size: 3rem; letter-spacing: -0.0625rem; }
h2 { font-size: 2rem; letter-spacing: -0.02rem; }
h3 { font-size: 1.375rem; letter-spacing: -0.02rem; }
h4 { font-size: 1.125rem; font-weight: 600; letter-spacing: 0; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.site-nav {
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-brand {
    text-decoration: none;
    flex-shrink: 0;
}

.brand-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: flex-end;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--body);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: var(--radius-md);
    line-height: 1.4;
    transition: color 0.15s ease, background 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--ink);
    background: var(--surface-strong);
    text-decoration: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-md);
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: background 0.15s ease;
    line-height: 1;
}

.btn-primary:hover {
    background: var(--primary-active);
    color: var(--on-primary);
    text-decoration: none;
}

.btn-secondary {
    background: var(--surface-card);
    color: var(--ink);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: background 0.15s ease, border-color 0.15s ease;
    line-height: 1;
}

.btn-secondary:hover {
    background: var(--canvas-soft);
    color: var(--ink);
    text-decoration: none;
}

.hero-band {
    padding: 80px 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline-soft);
}

.hero-label {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.055rem;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-strong);
    border-radius: var(--radius-pill);
    padding: 4px 10px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 4.5rem);
    font-weight: 400;
    letter-spacing: -0.135rem;
    line-height: 1.1;
    color: var(--ink);
    max-width: 800px;
    margin-bottom: 24px;
}

.hero-sub {
    font-size: 1rem;
    color: var(--body);
    max-width: 560px;
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-image-wrap {
    margin-top: 56px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    max-height: 480px;
}

.hero-image-wrap img {
    width: 100%;
    height: 480px;
    object-fit: cover;
}

.section {
    padding: 80px 0;
}

.section-label {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.055rem;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
    display: block;
}

.section-title {
    font-size: 2rem;
    font-weight: 400;
    letter-spacing: -0.02rem;
    color: var(--ink);
    margin-bottom: 16px;
}

.section-intro {
    font-size: 1rem;
    color: var(--body);
    max-width: 560px;
    line-height: 1.6;
    margin-bottom: 48px;
}

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

.card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.card-img {
    border-radius: var(--radius-md);
    overflow: hidden;
    margin: -24px -24px 0 -24px;
}

.card-img img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-tag {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.055rem;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-strong);
    border-radius: var(--radius-pill);
    padding: 4px 10px;
    width: fit-content;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: 0;
    line-height: 1.4;
}

.card-body {
    font-size: 0.875rem;
    color: var(--body);
    line-height: 1.5;
    flex: 1;
}

.card-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ink);
    text-decoration: none;
    border-bottom: 1px solid var(--hairline-strong);
    padding-bottom: 1px;
    width: fit-content;
    margin-top: auto;
}

.card-link:hover {
    color: var(--primary);
    border-bottom-color: var(--primary);
    text-decoration: none;
}

.divider {
    border: none;
    border-top: 1px solid var(--hairline);
    margin: 0;
}

.article-hero {
    padding: 56px 0 0;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.article-tag {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.055rem;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-strong);
    border-radius: var(--radius-pill);
    padding: 4px 10px;
}

.article-date {
    font-size: 0.8125rem;
    color: var(--muted);
}

.article-title {
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 400;
    letter-spacing: -0.04rem;
    color: var(--ink);
    max-width: 760px;
    margin-bottom: 20px;
    line-height: 1.15;
}

.article-lead {
    font-size: 1.0625rem;
    color: var(--body);
    max-width: 680px;
    line-height: 1.65;
    margin-bottom: 40px;
}

.article-cover {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    margin-bottom: 0;
}

.article-cover img {
    width: 100%;
    height: 420px;
    object-fit: cover;
}

.article-body {
    padding: 56px 0 80px;
}

.article-content {
    max-width: 760px;
}

.article-content h2 {
    font-size: 1.625rem;
    font-weight: 400;
    letter-spacing: -0.02rem;
    color: var(--ink);
    margin-top: 48px;
    margin-bottom: 16px;
    line-height: 1.25;
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0;
    color: var(--ink);
    margin-top: 32px;
    margin-bottom: 12px;
    line-height: 1.35;
}

.article-content p {
    color: var(--body);
    line-height: 1.7;
    margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
    list-style: disc;
    padding-left: 24px;
    margin-bottom: 20px;
    color: var(--body);
    line-height: 1.7;
}

.article-content ol {
    list-style: decimal;
}

.article-content li {
    margin-bottom: 6px;
}

.article-content a {
    color: var(--ink);
    text-decoration: underline;
    text-decoration-color: var(--hairline-strong);
    text-underline-offset: 3px;
}

.article-content a:hover {
    color: var(--primary);
    text-decoration-color: var(--primary);
}

.info-box {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--primary);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin: 32px 0;
}

.info-box p {
    font-size: 0.9375rem;
    color: var(--body-strong);
    margin: 0;
    line-height: 1.6;
}

.info-box strong {
    color: var(--ink);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin: 24px 0;
}

.info-item {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    padding: 16px 20px;
}

.info-item h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.info-item p {
    font-size: 0.8125rem;
    color: var(--body);
    margin: 0;
    line-height: 1.5;
}

.article-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    margin: 32px 0;
}

.article-image img {
    width: 100%;
    height: 340px;
    object-fit: cover;
}

.article-image figcaption {
    font-size: 0.8125rem;
    color: var(--muted);
    padding: 10px 16px;
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline-soft);
}

.related-articles {
    padding: 64px 0 80px;
    border-top: 1px solid var(--hairline);
}

.page-hero {
    padding: 64px 0 48px;
    border-bottom: 1px solid var(--hairline-soft);
}

.page-title {
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 400;
    letter-spacing: -0.04rem;
    color: var(--ink);
    margin-bottom: 16px;
    line-height: 1.15;
}

.page-body {
    padding: 56px 0 80px;
    max-width: 760px;
}

.page-body h2 {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--ink);
    letter-spacing: -0.02rem;
    margin-top: 40px;
    margin-bottom: 16px;
}

.page-body h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ink);
    margin-top: 28px;
    margin-bottom: 10px;
}

.page-body p {
    color: var(--body);
    line-height: 1.7;
    margin-bottom: 16px;
}

.page-body ul {
    list-style: disc;
    padding-left: 24px;
    margin-bottom: 16px;
    color: var(--body);
    line-height: 1.7;
}

.page-body li {
    margin-bottom: 6px;
}

.contact-form {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-top: 40px;
}

.contact-form h2 {
    font-size: 1.375rem;
    font-weight: 400;
    color: var(--ink);
    margin-bottom: 8px;
    margin-top: 0;
}

.contact-form p {
    font-size: 0.875rem;
    color: var(--body);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--surface-card);
    color: var(--ink);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    padding: 12px 16px;
    height: 44px;
    transition: border-color 0.15s ease;
    outline: none;
}

.form-group textarea {
    height: auto;
    min-height: 120px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--ink);
}

.form-group input.error,
.form-group textarea.error {
    border-color: var(--semantic-error);
}

.field-error {
    font-size: 0.8125rem;
    color: var(--semantic-error);
    margin-top: 4px;
    display: none;
}

.field-error.visible {
    display: block;
}

.form-status {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    margin-top: 16px;
    display: none;
}

.form-status.success {
    background: #f0faf5;
    border: 1px solid #b3e4ce;
    color: var(--semantic-success);
    display: block;
}

.form-status.loading {
    background: var(--canvas-soft);
    border: 1px solid var(--hairline);
    color: var(--muted);
    display: block;
}

.cookie-banner {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 999;
    width: calc(100% - 48px);
    max-width: 640px;
    background: var(--ink);
    color: var(--canvas);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    display: none;
}

.cookie-banner.visible {
    display: block;
}

.cookie-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.cookie-inner p {
    font-size: 0.875rem;
    color: var(--canvas-soft);
    margin: 0;
    flex: 1;
    min-width: 200px;
    line-height: 1.5;
}

.cookie-inner p a {
    color: var(--on-primary);
    text-decoration-color: rgba(245,78,0,0.4);
}

.cookie-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.cookie-banner .btn-primary {
    background: var(--primary);
    height: 36px;
    padding: 8px 16px;
    font-size: 0.8125rem;
}

.cookie-banner .btn-secondary {
    background: transparent;
    border-color: rgba(255,255,255,0.25);
    color: var(--canvas);
    height: 36px;
    padding: 8px 16px;
    font-size: 0.8125rem;
}

.cookie-banner .btn-secondary:hover {
    background: rgba(255,255,255,0.08);
}

.site-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding: 64px 0 48px;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-logo {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ink);
    text-decoration: none;
    letter-spacing: -0.02em;
    display: block;
    margin-bottom: 12px;
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--body);
    line-height: 1.5;
    max-width: 240px;
}

.footer-heading {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: 0;
    margin-bottom: 16px;
    line-height: 1.4;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--body);
    text-decoration: none;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 48px auto 0;
    padding: 24px 24px 0;
    border-top: 1px solid var(--hairline-soft);
}

.footer-copy {
    font-size: 0.8125rem;
    color: var(--muted);
    line-height: 1.5;
    margin-bottom: 6px;
}

.footer-copy a {
    color: var(--muted);
}

.features-band {
    background: var(--surface-card);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.feature-item {
    padding: 0;
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--surface-strong);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 1.25rem;
}

.feature-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
    line-height: 1.4;
}

.feature-desc {
    font-size: 0.9375rem;
    color: var(--body);
    line-height: 1.6;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}

.breadcrumb a,
.breadcrumb span {
    font-size: 0.8125rem;
    color: var(--muted);
    text-decoration: none;
}

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

.breadcrumb-sep {
    color: var(--muted-soft);
}

@media (max-width: 1024px) {
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; letter-spacing: -0.04rem; }
    h2 { font-size: 1.5rem; }

    .nav-toggle { display: flex; }

    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        flex-direction: column;
        align-items: flex-start;
        padding: 12px 24px 20px;
        gap: 2px;
    }

    .nav-menu.open { display: flex; }
    .nav-menu li { width: 100%; }
    .nav-link { width: 100%; display: block; }

    .hero-band { padding: 48px 0; }
    .hero-image-wrap img { height: 280px; }
    .section { padding: 56px 0; }
    .card-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 28px; }
    .article-cover img { height: 260px; }
    .contact-form { padding: 24px 20px; }
    .cookie-banner { bottom: 16px; width: calc(100% - 32px); }
    .cookie-inner { flex-direction: column; gap: 16px; }
}

@media (max-width: 480px) {
    .footer-inner { grid-template-columns: 1fr; }
}