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

:root {
    --canvas: #f7f7f4;
    --canvas-soft: #fafaf7;
    --surface-card: #ffffff;
    --surface-strong: #e6e5e0;
    --ink: #26251e;
    --body: #5a5852;
    --body-strong: #26251e;
    --muted: #807d72;
    --muted-soft: #a09c92;
    --primary: #f54e00;
    --primary-active: #d04200;
    --on-primary: #ffffff;
    --hairline: #e6e5e0;
    --hairline-soft: #efeee8;
    --hairline-strong: #cfcdc4;
    --semantic-success: #1f8a65;
    --semantic-error: #cf2d56;
    --font-main: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-pill: 9999px;
}

html { scroll-behavior: smooth; }

body {
    background: var(--canvas);
    color: var(--body);
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.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;
    display: flex;
    align-items: center;
}

.nav-inner {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-logo {
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.2px;
    flex-shrink: 0;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 4px;
    flex: 1;
}

.nav-menu li a {
    display: block;
    padding: 6px 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--body);
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s;
}

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

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    margin-left: auto;
}

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

.hero {
    padding: 80px 0 64px;
    border-bottom: 1px solid var(--hairline);
}

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

.hero-label {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    border-radius: var(--radius-pill);
    padding: 4px 10px;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 72px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -2.16px;
    color: var(--ink);
    max-width: 860px;
    margin-bottom: 24px;
}

.hero-sub {
    font-size: 18px;
    line-height: 1.5;
    color: var(--body);
    max-width: 600px;
    margin-bottom: 40px;
}

.hero-img {
    width: 100%;
    max-height: 480px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 1px solid var(--hairline);
}

.section {
    padding: 80px 0;
}

.section-border {
    border-bottom: 1px solid var(--hairline);
}

.section-label {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    border-radius: var(--radius-pill);
    padding: 4px 10px;
    margin-bottom: 20px;
}

.section-title {
    font-size: 36px;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.72px;
    color: var(--ink);
    margin-bottom: 12px;
}

.section-sub {
    font-size: 16px;
    color: var(--body);
    max-width: 580px;
    margin-bottom: 48px;
}

.cards-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 {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    border: 1px solid var(--hairline-soft);
}

.card-meta {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 12px;
    color: var(--muted);
}

.card-tag {
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    border-radius: var(--radius-pill);
    padding: 2px 8px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--ink);
}

.card-title a {
    color: var(--ink);
    text-decoration: none;
}

.card-title a:hover {
    color: var(--primary);
    text-decoration: none;
}

.card-excerpt {
    font-size: 14px;
    line-height: 1.55;
    color: var(--body);
    flex: 1;
}

.card-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: auto;
}

.card-link:hover { text-decoration: underline; }

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

.feature-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 15px;
    color: var(--body);
    line-height: 1.55;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: var(--font-main);
    font-size: 14px;
    font-weight: 500;
    line-height: 1;
    cursor: pointer;
    border: none;
    transition: background 0.15s, color 0.15s;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--radius-md);
}

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

.btn-secondary {
    background: var(--surface-card);
    color: var(--ink);
    border: 1px solid var(--hairline-strong);
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--radius-md);
}

.btn-secondary:hover {
    background: var(--surface-strong);
    text-decoration: none;
}

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

.article-hero h1 {
    font-size: 48px;
    font-weight: 400;
    letter-spacing: -1px;
    line-height: 1.15;
    color: var(--ink);
    max-width: 800px;
    margin-bottom: 20px;
}

.article-meta {
    font-size: 13px;
    color: var(--muted);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.article-body {
    max-width: 740px;
}

.article-body h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin: 48px 0 16px;
}

.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    margin: 32px 0 12px;
}

.article-body p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--body);
    margin-bottom: 20px;
}

.article-body ul, .article-body ol {
    padding-left: 20px;
    margin-bottom: 20px;
}

.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }

.article-body li {
    font-size: 16px;
    line-height: 1.65;
    color: var(--body);
    margin-bottom: 6px;
}

.article-body a {
    color: var(--primary);
}

.article-body a:hover {
    text-decoration: underline;
}

.article-img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--hairline);
    margin: 32px 0;
}

.article-img-caption {
    font-size: 13px;
    color: var(--muted);
    margin-top: -24px;
    margin-bottom: 32px;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
    align-items: start;
}

.article-sidebar {
    position: sticky;
    top: 80px;
}

.sidebar-box {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
}

.sidebar-box h4 {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

.sidebar-box ul li {
    margin-bottom: 8px;
}

.sidebar-box ul li a {
    font-size: 14px;
    color: var(--body);
    display: block;
    padding: 4px 0;
    border-bottom: 1px solid var(--hairline-soft);
}

.sidebar-box ul li a:hover {
    color: var(--primary);
    text-decoration: none;
}

.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;
    font-size: 15px;
    color: var(--body);
    line-height: 1.6;
}

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

.page-hero h1 {
    font-size: 48px;
    font-weight: 400;
    letter-spacing: -1px;
    color: var(--ink);
    margin-bottom: 12px;
}

.page-hero p {
    font-size: 16px;
    color: var(--body);
    max-width: 560px;
}

.page-body {
    max-width: 740px;
    padding: 48px 0;
}

.page-body h2 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin: 40px 0 12px;
}

.page-body p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--body);
    margin-bottom: 16px;
}

.page-body ul {
    list-style: disc;
    padding-left: 20px;
    margin-bottom: 16px;
}

.page-body ul li {
    font-size: 15px;
    line-height: 1.65;
    color: var(--body);
    margin-bottom: 6px;
}

.contact-form {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 560px;
    margin-top: 48px;
}

.contact-form h2 {
    font-size: 22px;
    font-weight: 400;
    color: var(--ink);
    margin-bottom: 24px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    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);
    padding: 12px 16px;
    height: 44px;
    font-family: var(--font-main);
    font-size: 15px;
    transition: border-color 0.15s;
    outline: none;
}

.form-group textarea {
    height: auto;
    min-height: 110px;
    resize: vertical;
}

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

.form-status {
    display: none;
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
}

.form-status.success {
    background: #e8f5f0;
    color: var(--semantic-success);
    border: 1px solid var(--semantic-success);
    display: block;
}

.form-status.error {
    background: #fce8ed;
    color: var(--semantic-error);
    border: 1px solid var(--semantic-error);
    display: block;
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.article-row {
    background: var(--surface-card);
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 24px;
    padding: 24px;
    border-bottom: 1px solid var(--hairline-soft);
    transition: background 0.15s;
}

.article-row:last-child { border-bottom: none; }

.article-row:hover { background: var(--canvas-soft); }

.article-row-img {
    width: 120px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.article-row-meta {
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 6px;
}

.article-row-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.article-row-title a { color: var(--ink); }
.article-row-title a:hover { color: var(--primary); text-decoration: none; }

.article-row-excerpt {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
}

.cookie-banner {
    display: none;
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 48px);
    max-width: 640px;
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-lg);
    z-index: 999;
    box-shadow: 0 4px 24px rgba(38,37,30,0.08);
}

.cookie-inner {
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cookie-inner p {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
}

.cookie-inner a {
    color: var(--primary);
}

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

.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;
    gap: 48px;
}

.footer-brand {
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    display: block;
    margin-bottom: 12px;
}

.footer-desc {
    font-size: 14px;
    color: var(--body);
    line-height: 1.55;
}

.footer-col strong {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    color: var(--muted);
    display: block;
    margin-bottom: 14px;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul li a {
    font-size: 14px;
    color: var(--body);
}

.footer-col ul li a:hover {
    color: var(--ink);
    text-decoration: underline;
}

.footer-copy {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 4px;
}

.breadcrumb {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 24px;
    flex-wrap: wrap;
}

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

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

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

.divider {
    border: none;
    border-top: 1px solid var(--hairline);
    margin: 48px 0;
}

@media (max-width: 1024px) {
    .hero h1 { font-size: 56px; letter-spacing: -1.5px; }
    .cards-grid { grid-template-columns: repeat(2, 1fr); }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        padding: 12px 16px;
    }
    .nav-menu.open { display: flex; }
    .nav-hamburger { display: flex; }
    .nav-inner { position: relative; }
    .hero h1 { font-size: 36px; letter-spacing: -0.8px; }
    .hero-sub { font-size: 16px; }
    .section-title { font-size: 28px; }
    .cards-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .article-hero h1 { font-size: 32px; letter-spacing: -0.4px; }
    .page-hero h1 { font-size: 32px; }
    .footer-inner { grid-template-columns: 1fr; gap: 24px; }
    .article-row { grid-template-columns: 1fr; }
    .article-row-img { width: 100%; height: 180px; }
    .cookie-banner { bottom: 12px; width: calc(100% - 24px); }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero { padding: 48px 0 40px; }
    .hero h1 { font-size: 28px; }
    .section { padding: 48px 0; }
    .contact-form { padding: 24px 16px; }
}