/* OKX / 欧易下载官网 — 全新视觉（靛紫 + 青绿主题） */
:root {
    --primary: #5b21b6;
    --primary-light: #7c3aed;
    --primary-dark: #4c1d95;
    --accent: #14b8a6;
    --accent-light: #2dd4bf;
    --surface: #ffffff;
    --surface-alt: #f5f3ff;
    --surface-dark: #1e1b4b;
    --text: #1f2937;
    --text-muted: #6b7280;
    --border: #e5e7eb;
    --shadow: 0 4px 24px rgba(91, 33, 182, 0.08);
    --shadow-lg: 0 12px 40px rgba(91, 33, 182, 0.12);
    --radius: 12px;
    --radius-lg: 16px;
    --container: 1140px;
    --nav-h: 72px;
    --section-py: 4rem;
    --section-header-mb: 2.5rem;
    --grid-gap: 1.25rem;
    --card-pad: 1.35rem;
    --card-border: 1px solid var(--border);
    --transition: 0.25s ease;
    --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

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

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

body {
    font-family: var(--font);
    color: var(--text);
    line-height: 1.65;
    background: var(--surface);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.z43f94container,
.z43f94hero-content,
.z43f94intro-grid > div,
.z43f94download-card-head > div:last-child,
.z43f94article-card-body,
.z43f94faq-item {
    min-width: 0;
}

.z43f94section > .z43f94container,
.z43f94stats-section > .z43f94container,
.z43f94hero-section > .z43f94container {
    overflow: hidden;
}

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

a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }

.z43f94container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* —— 导航 —— */
.z43f94navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: var(--nav-h);
}

.z43f94navbar .z43f94container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 1rem;
    position: relative;
}

.z43f94navbar-brand img { height: 42px; width: auto; }

.z43f94nav-toggle { display: none; }

.z43f94navbar-nav {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 0.1rem;
    list-style: none;
    max-width: calc(100% - 180px);
    justify-content: flex-end;
}

.z43f94nav-link {
    display: block;
    padding: 0.45rem 0.65rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text) !important;
    border-radius: 8px;
    white-space: nowrap;
}

.z43f94nav-link:hover,
.z43f94nav-item.active .z43f94nav-link {
    color: var(--primary-light) !important;
    background: var(--surface-alt);
}

/* —— 按钮 —— */
.z43f94btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    text-align: center;
}

.z43f94btn-primary {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: #fff;
}

.z43f94btn-primary:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.z43f94btn-light {
    background: #fff;
    color: var(--primary);
    box-shadow: var(--shadow);
}

.z43f94btn-light:hover { color: var(--primary-dark); transform: translateY(-2px); }

.z43f94btn-outline {
    background: transparent;
    color: var(--primary-light);
    border: 2px solid var(--primary-light);
}

.z43f94btn-outline:hover {
    background: var(--primary-light);
    color: #fff;
}

.z43f94btn-accent {
    background: linear-gradient(135deg, var(--accent), #0d9488);
    color: #fff;
}

.z43f94btn-accent:hover { color: #fff; transform: translateY(-2px); }

.z43f94btn-sm { padding: 0.5rem 1rem; font-size: 0.85rem; }

.z43f94btn-block {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.z43f94register-cta {
    text-align: center;
    margin-top: 1.75rem;
}

/* —— 区块标题 —— */
.z43f94section { padding: var(--section-py) 0; }

.z43f94section-alt { background: var(--surface-alt); }

.z43f94section-dark {
    background: linear-gradient(160deg, var(--surface-dark) 0%, #312e81 100%);
    color: #fff;
}

.z43f94section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--section-header-mb);
    padding: 0 0.5rem;
}

.z43f94section-header h2 {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.75rem;
}

.z43f94section-dark .z43f94section-header h2 { color: #fff; }

.z43f94section-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

.z43f94section-dark .z43f94section-header p { color: rgba(255,255,255,0.75); }

.z43f94eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.z43f94section-dark .z43f94eyebrow { color: var(--accent-light); }

/* —— Hero —— */
.z43f94hero-section {
    padding: 3.25rem 0 4rem;
    background: linear-gradient(145deg, #faf5ff 0%, #ecfeff 50%, #f0fdf4 100%);
    overflow: hidden;
    position: relative;
}

.z43f94hero-section::after {
    content: "";
    position: absolute;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.12), transparent 70%);
    top: -120px;
    right: -80px;
    pointer-events: none;
}

.z43f94hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2.5rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.z43f94hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.z43f94hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
    max-width: 100%;
    word-break: break-word;
}

.z43f94hero-lead {
    font-size: 0.92rem;
    color: var(--text);
    margin-bottom: 1.5rem;
    padding: 0.85rem 1rem;
    background: rgba(255,255,255,0.85);
    border: 1px solid rgba(91, 33, 182, 0.08);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius);
    line-height: 1.7;
    word-break: break-word;
}

.z43f94hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.z43f94hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.z43f94hero-image {
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.z43f94hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.z43f94badge {
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text-muted);
}

/* —— 数据条 —— */
.z43f94stats-section {
    padding: 3rem 0;
}

.z43f94stats-section .z43f94section-header {
    margin-bottom: 2rem;
}

.z43f94stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--grid-gap);
}

.z43f94stat-item {
    text-align: center;
    padding: 1.15rem 0.75rem;
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.14);
    min-height: 0;
}

.z43f94stat-number {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--accent-light);
    line-height: 1.2;
}

.z43f94stat-label {
    font-size: 0.95rem;
    opacity: 0.85;
    margin-top: 0.35rem;
}

/* —— 简介双栏 —— */
.z43f94intro-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
}

.z43f94intro-grid h3 {
    font-size: 1.35rem;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.z43f94intro-grid p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.z43f94intro-cards {
    display: grid;
    gap: 1rem;
}

.z43f94intro-card {
    padding: var(--card-pad);
    background: var(--surface);
    border-radius: var(--radius);
    border: var(--card-border);
    box-shadow: var(--shadow);
}

.z43f94intro-card strong {
    display: block;
    color: var(--primary);
    margin-bottom: 0.35rem;
}

/* —— 特性网格 —— */
.z43f94features-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--grid-gap);
}

.z43f94feature-card {
    padding: var(--card-pad);
    background: var(--surface);
    border-radius: var(--radius);
    border: var(--card-border);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.z43f94feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.z43f94feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    color: #fff;
    border-radius: 14px;
    margin-bottom: 1.25rem;
}

.z43f94feature-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.65rem;
    color: var(--primary-dark);
}

.z43f94feature-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
    flex: 1;
    margin-bottom: 0;
}

/* —— 下载区 —— */
.z43f94download-section { background: var(--surface-alt); }

.z43f94download-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--grid-gap);
    align-items: stretch;
}

.z43f94download-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: var(--card-pad);
    border: var(--card-border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
    min-width: 0;
    transition: transform var(--transition), box-shadow var(--transition);
}

.z43f94download-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.z43f94download-card-head {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    margin-bottom: 1rem;
}

.z43f94platform-icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: #fff;
    flex-shrink: 0;
}

.z43f94ios-icon { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.z43f94android-icon { background: linear-gradient(135deg, #22c55e, #16a34a); }
.z43f94win-icon { background: linear-gradient(135deg, #0ea5e9, #0284c7); }

.z43f94download-card h3 {
    font-size: 1rem;
    margin-bottom: 0.2rem;
    line-height: 1.35;
    word-break: break-word;
}

.z43f94download-card .meta { font-size: 0.8rem; color: var(--text-muted); }

.z43f94download-info {
    flex: 1;
    margin-bottom: 1rem;
    padding: 0.65rem 0.75rem;
    background: var(--surface-alt);
    border-radius: 8px;
    border: 1px solid rgba(91, 33, 182, 0.06);
}

.z43f94info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.z43f94info-item::before {
    content: "✓";
    color: var(--accent);
    font-weight: 700;
    flex-shrink: 0;
}

/* —— 注册步骤 —— */
.z43f94steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--grid-gap);
    counter-reset: step;
}

.z43f94step {
    position: relative;
    padding: 1.15rem 0.85rem;
    background: var(--surface);
    border-radius: var(--radius);
    text-align: center;
    border: var(--card-border);
    min-width: 0;
}

.z43f94step::before {
    counter-increment: step;
    content: counter(step);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    margin: 0 auto 0.75rem;
    background: var(--primary-light);
    color: #fff;
    border-radius: 50%;
    font-weight: 700;
}

.z43f94step h4 { font-size: 0.95rem; margin-bottom: 0.35rem; color: var(--primary-dark); }
.z43f94step p { font-size: 0.82rem; color: var(--text-muted); }

/* —— 安全 —— */
.z43f94security-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--grid-gap);
}

.z43f94security-card {
    padding: var(--card-pad);
    background: var(--surface);
    border-radius: var(--radius);
    border: var(--card-border);
    text-align: center;
    height: 100%;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.z43f94security-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    background: var(--surface-alt);
    color: var(--primary-light);
    border-radius: 50%;
}

.z43f94security-card h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--primary-dark);
}

.z43f94security-features {
    text-align: left;
    margin-top: auto;
    padding: 0.5rem 0.65rem;
    background: var(--surface-alt);
    border-radius: 8px;
    border: 1px solid rgba(91, 33, 182, 0.06);
}

.z43f94security-card .z43f94feature-item {
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 0.3rem 0;
    border-bottom: 1px solid var(--border);
    line-height: 1.45;
    word-break: break-word;
}

.z43f94security-card .z43f94feature-item:last-child { border-bottom: none; }

.z43f94cert-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--grid-gap);
    margin-top: 2rem;
}

.z43f94certificate-card {
    padding: 1.15rem 1rem;
    background: var(--surface);
    border-radius: var(--radius);
    border: var(--card-border);
    text-align: center;
    min-width: 0;
}

.z43f94certificate-card h4 {
    font-size: 0.95rem;
    color: var(--primary);
    margin: 0.5rem 0 0.35rem;
}

.z43f94certificate-card p { font-size: 0.82rem; color: var(--text-muted); }

/* —— FAQ —— */
.z43f94faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--grid-gap);
    max-width: 920px;
    margin: 0 auto;
}

.z43f94faq-item {
    background: var(--surface);
    border: var(--card-border);
    border-radius: var(--radius);
    padding: var(--card-pad);
    min-width: 0;
    height: 100%;
}

.z43f94faq-item h4 {
    font-size: 1rem;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.z43f94faq-item p { font-size: 0.9rem; color: var(--text-muted); }

/* —— 文章 —— */
.z43f94article-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.z43f94article-header h2 { font-size: 1.75rem; color: var(--primary-dark); }

.z43f94articles-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--grid-gap);
}

.z43f94article-card {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    border: var(--card-border);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.z43f94article-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.z43f94thumb-home {
    width: 100%;
    height: 110px;
    object-fit: cover;
    flex-shrink: 0;
}

.z43f94article-card-body {
    padding: 0.75rem 0.85rem 0.9rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.z43f94article-meta {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.z43f94article-card h3 {
    font-size: 0.88rem;
    line-height: 1.45;
    font-weight: 600;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.z43f94article-card h3 a { color: var(--text); }
.z43f94article-card h3 a:hover { color: var(--primary-light); }

/* —— 页脚 —— */
.z43f94footer {
    background: var(--surface-dark);
    color: rgba(255,255,255,0.75);
    padding: 3rem 0 1.75rem;
}

.z43f94footer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
    gap: 1.75rem;
    margin-bottom: 2rem;
}

.z43f94footer p { font-size: 0.9rem; line-height: 1.7; margin-top: 1rem; }

.z43f94footer-title {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.z43f94footer-links { list-style: none; }

.z43f94footer-links li { margin-bottom: 0.5rem; }

.z43f94footer-link {
    color: rgba(255,255,255,0.65);
    font-size: 0.9rem;
}

.z43f94footer-link:hover { color: var(--accent-light); }

.z43f94friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    list-style: none;
    padding: 0;
}

.z43f94friend-links a { color: rgba(255,255,255,0.6); font-size: 0.85rem; }
.z43f94friend-links a:hover { color: var(--accent-light); }

.z43f94footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
}

.z43f94footer-bottom p { margin-top: 0.5rem; }
.z43f94footer-bottom a { color: rgba(255,255,255,0.7); margin: 0 0.35rem; }
.z43f94footer-bottom a:hover { color: #fff; }

/* —— 列表页 / 内页 —— */
.z43f94page-section { padding: 3rem 0 4rem; background: var(--surface-alt); min-height: 50vh; }

.z43f94page-header { margin-bottom: 2rem; }
.z43f94page-header h1 { font-size: 1.75rem; color: var(--primary-dark); margin-bottom: 0.5rem; }
.z43f94page-header p { color: var(--text-muted); }

.z43f94page-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 2rem;
    align-items: start;
}

.z43f94card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

.z43f94card + .z43f94card { margin-top: 1.25rem; }

.listbox .e2 { list-style: none; }

.listbox .e2 li {
    padding-bottom: 1.25rem;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--border);
}

.listbox .e2 li:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.z43f94list-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 1rem;
    align-items: start;
}

.z43f94thumb-list,
.z43f94thumb-related {
    width: 100%;
    height: 84px;
    object-fit: cover;
    border-radius: var(--radius);
}

.z43f94list-meta { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.35rem; }

.listbox .e2 h2 { font-size: 1.05rem; margin-bottom: 0.35rem; }
.listbox .e2 h2 a { color: var(--text); font-weight: 600; }
.listbox .e2 h2 a:hover { color: var(--primary-light); }
.listbox .e2 p { font-size: 0.9rem; color: var(--text-muted); }

.z43f94sidebar h3 {
    font-size: 1rem;
    color: var(--primary-dark);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent);
}

.z43f94sidebar ul { list-style: none; }
.z43f94sidebar li { margin-bottom: 0.5rem; }
.z43f94sidebar li a { color: var(--text); font-size: 0.9rem; }
.z43f94sidebar li a:hover { color: var(--primary-light); }

.z43f94side-article {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.85rem;
    align-items: flex-start;
}

.z43f94thumb-side {
    width: 72px;
    height: 54px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.z43f94article-content {
    line-height: 1.8;
    overflow-wrap: break-word;
    word-break: break-word;
}

.z43f94article-content img { max-width: 100%; height: auto; margin: 1rem 0; }

.z43f94article-content table,
.z43f94article-content pre,
.z43f94article-content iframe {
    display: block;
    max-width: 100%;
    overflow-x: auto;
}

.z43f94article-meta-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.z43f94thumb-cover {
    max-width: 100%;
    width: 100%;
    max-height: 320px;
    object-fit: cover;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.z43f94meta-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.5rem; }
.z43f94tagitem a {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--surface-alt);
    border-radius: 999px;
    font-size: 0.8rem;
    color: var(--primary);
}

.z43f94related-title {
    font-size: 1.1rem;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.z43f94related-link {
    font-weight: 600;
    color: var(--text);
}

.z43f94related-link:hover {
    color: var(--primary-light);
}

.z43f94prenext {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

@media (min-width: 768px) {
    .z43f94prenext { flex-direction: row; justify-content: space-between; }
}

.pagebar .pagelist {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 1.5rem 0 0;
}

.pagebar .pagelist li { display: inline-flex; }

/* —— 移动端导航 —— */
.z43f94nav-toggle-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
}

.z43f94nav-toggle-btn span {
    display: block;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

body.z43f94nav-open {
    overflow: hidden;
    touch-action: none;
}

@media (max-width: 1199px) {
    .z43f94navbar-nav {
        max-width: calc(100% - 160px);
    }

    .z43f94nav-link {
        padding: 0.4rem 0.5rem;
        font-size: 0.8125rem;
    }

    .z43f94features-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .z43f94download-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .z43f94download-grid .z43f94download-card:last-child {
        grid-column: 1 / -1;
        max-width: 50%;
        margin-left: auto;
        margin-right: auto;
        width: 100%;
    }

    .z43f94articles-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .z43f94security-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 991px) {
    :root {
        --section-py: 3rem;
        --section-header-mb: 2rem;
        --nav-h: 64px;
    }

    .z43f94nav-toggle-btn { display: flex; flex-shrink: 0; }

    .z43f94navbar-brand {
        flex: 1;
        min-width: 0;
    }

    .z43f94navbar-brand img {
        height: 36px;
        max-width: 100%;
        object-fit: contain;
    }

    .z43f94navbar-nav {
        display: none;
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        width: 100%;
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: stretch;
        max-width: none;
        margin: 0;
        background: var(--surface);
        padding: 0.5rem 1rem calc(1rem + env(safe-area-inset-bottom, 0px));
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        max-height: calc(100vh - var(--nav-h));
        max-height: calc(100dvh - var(--nav-h));
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        z-index: 999;
    }

    .z43f94navbar-nav.is-open { display: flex; }

    .z43f94nav-item { width: 100%; }

    .z43f94nav-link {
        padding: 0.75rem 0.85rem;
        min-height: 44px;
        width: 100%;
        font-size: 0.95rem;
        display: flex;
        align-items: center;
        white-space: normal;
        line-height: 1.35;
    }

    .z43f94hero-section { padding: 2rem 0 2.5rem; }
    .z43f94hero-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: left;
    }
    .z43f94hero-visual { order: -1; }
    .z43f94hero-image { max-width: min(280px, 85vw); }
    .z43f94hero-title { font-size: clamp(1.65rem, 7vw, 2.25rem); }
    .z43f94hero-subtitle { font-size: 1rem; }
    .z43f94hero-lead {
        text-align: left;
        max-width: 100%;
        margin-left: 0;
        margin-right: 0;
    }
    .z43f94hero-buttons {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }
    .z43f94hero-buttons .z43f94btn {
        width: 100%;
        white-space: normal;
        line-height: 1.35;
        padding: 0.85rem 1rem;
    }
    .z43f94hero-badges { justify-content: flex-start; }

    .z43f94section-header h2 { font-size: 1.5rem; }
    .z43f94section-header p { font-size: 0.95rem; }

    .z43f94stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .z43f94intro-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .z43f94features-grid { grid-template-columns: 1fr; }
    .z43f94feature-card { text-align: left; }
    .z43f94feature-icon { margin-left: 0; margin-right: auto; }

    .z43f94download-grid {
        grid-template-columns: 1fr;
        max-width: none;
        margin: 0;
    }

    .z43f94download-grid .z43f94download-card:last-child {
        grid-column: auto;
        max-width: none;
        margin-left: 0;
        margin-right: 0;
    }

    .z43f94steps { grid-template-columns: 1fr; }
    .z43f94security-grid { grid-template-columns: 1fr; }
    .z43f94cert-row {
        grid-template-columns: 1fr;
        max-width: none;
        margin-left: 0;
        margin-right: 0;
    }
    .z43f94faq-grid { grid-template-columns: 1fr; }
    .z43f94articles-grid { grid-template-columns: 1fr; }
    .z43f94footer-grid { grid-template-columns: 1fr; gap: 1.75rem; }
    .z43f94page-layout { grid-template-columns: 1fr; gap: 1.5rem; }

    .z43f94article-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .z43f94article-header h2 { font-size: 1.4rem; }
    .z43f94article-header .z43f94btn { width: 100%; }

    .z43f94page-section { padding: 2rem 0 2.5rem; }
    .z43f94page-header h1 { font-size: 1.4rem; }
    .z43f94card { padding: 1.15rem; }

    .z43f94register-cta .z43f94btn { width: 100%; }
}

@media (max-width: 575px) {
    :root {
        --section-py: 2.25rem;
        --card-pad: 1rem;
        --grid-gap: 1rem;
    }

    .z43f94container {
        padding-left: max(1rem, env(safe-area-inset-left, 0px));
        padding-right: max(1rem, env(safe-area-inset-right, 0px));
    }

    .z43f94section-header { margin-bottom: 1.35rem; }

    .z43f94stats-section { padding: 2rem 0; }
    .z43f94stats-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
    .z43f94stat-item { padding: 0.85rem 0.5rem; }
    .z43f94stat-number { font-size: 1.5rem; }
    .z43f94stat-label { font-size: 0.82rem; }

    .z43f94footer { padding: 2rem 0 1.25rem; }
    .z43f94footer-bottom { font-size: 0.8rem; line-height: 1.6; }
    .z43f94friend-links { gap: 0.5rem 0.85rem; }

    .z43f94list-item {
        grid-template-columns: 1fr;
        gap: 0.65rem;
    }

    .z43f94thumb-list,
    .z43f94thumb-related {
        height: auto;
        max-height: 180px;
        aspect-ratio: 16 / 9;
    }

    .z43f94thumb-home { height: 160px; }

    .z43f94thumb-cover {
        max-height: 220px;
        border-radius: var(--radius);
    }

    .z43f94article-meta-bar {
        flex-direction: column;
        gap: 0.35rem;
        align-items: flex-start;
    }

    .z43f94side-article {
        flex-direction: column;
        gap: 0.5rem;
    }

    .z43f94thumb-side {
        width: 100%;
        height: auto;
        max-height: 120px;
        aspect-ratio: 16 / 9;
    }

    .z43f94side-article > a:last-child {
        font-size: 0.9rem;
        line-height: 1.45;
    }

    .z43f94download-card-head { align-items: center; }

    .z43f94btn {
        font-size: 0.9rem;
        padding: 0.8rem 1rem;
    }

    .pagebar .pagelist {
        justify-content: center;
        gap: 0.35rem;
    }
}

@media (max-width: 380px) {
    .z43f94stats-grid { grid-template-columns: 1fr; }
    .z43f94hero-badges { flex-direction: column; align-items: flex-start; }
    .z43f94badge { width: 100%; text-align: center; }
}