/*
Theme Name: bian_mb4
Theme URI: https://www.binance.com/
Author: Binance
Author URI: https://www.binance.com/
Description: 币安加密货币交易平台主题
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Tags: crypto, trading, dark theme, finance, responsive
Text Domain: bian_mb4

This theme, like WordPress, is licensed under the GPL.
Use it to make something cool, have fun, and share what you've learned.
*/

:root {
    --primary: #F0B90B;
    --primary-dark: #D4990A;
    --bg: #0B0E11;
    --bg-secondary: #0F1318;
    --bg-card: #1E2329;
    --border: rgba(43, 49, 57, 0.4);
    --text-primary: #FFFFFF;
    --text-secondary: #B7BDC6;
    --text-muted: #848E9C;
    --text-dark: #5E6673;
    --green: #0ECB81;
    --red: #F6465D;
    --purple: #8B5CF6;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.25s ease;
}

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

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

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

::selection {
    background: rgba(240, 185, 11, 0.3);
    color: var(--text-primary);
}

::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-card);
}
::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    letter-spacing: 0.3px;
    text-align: center;
    gap: 8px;
}

.btn-primary {
    background: var(--primary);
    color: var(--bg);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(240, 185, 11, 0.35);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-secondary:hover {
    background: rgba(240, 185, 11, 0.12);
    transform: translateY(-2px);
}

.btn-download {
    background: var(--primary);
    color: var(--bg);
}
.btn-download:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(240, 185, 11, 0.35);
}

.btn-register {
    background: var(--primary);
    color: var(--bg);
}
.btn-register:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(240, 185, 11, 0.35);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 44px;
    font-size: 17px;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(11, 14, 17, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
}

.navbar .container,
.navbar .container-wide {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    flex-shrink: 0;
}

.nav-logo svg {
    width: 32px;
    height: 32px;
}

.nav-logo span {
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-links li a {
    padding: 6px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    transition: all 0.25s ease;
    position: relative;
}

.nav-links li a:hover,
.nav-links li a.active {
    color: var(--primary);
    background: rgba(240, 185, 11, 0.08);
}

.nav-links li a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.nav-actions .btn {
    padding: 8px 20px;
    font-size: 13px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}

.hamburger span {
    width: 26px;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.hero {
    padding: 140px 0 100px;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(240, 185, 11, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(240, 185, 11, 0.04) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.12;
    color: var(--text-primary);
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero-content h1 .highlight {
    color: var(--primary);
    position: relative;
}

.hero-content p {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 520px;
    margin-bottom: 36px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.hero-buttons .btn {
    padding: 16px 40px;
    font-size: 16px;
    min-width: 160px;
}

.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(43, 49, 57, 0.6);
}

.hero-stats .stat-item {
    text-align: left;
}

.hero-stats .stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

.hero-stats .stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 2px;
}

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

.hero-visual .card-glow {
    background: linear-gradient(145deg, #1E2329, #2B3139);
    border-radius: 24px;
    padding: 40px 32px;
    width: 100%;
    max-width: 440px;
    border: 1px solid rgba(43, 49, 57, 0.5);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.hero-visual .card-glow::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 70% 30%, rgba(240, 185, 11, 0.05), transparent 60%);
    pointer-events: none;
}

.hero-visual .card-glow .card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.hero-visual .card-glow .card-header .badge {
    background: rgba(240, 185, 11, 0.15);
    color: var(--primary);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.hero-visual .card-glow .price-row {
    display: flex;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid rgba(43, 49, 57, 0.4);
}

.hero-visual .card-glow .price-row:last-child {
    border-bottom: none;
}

.hero-visual .card-glow .price-row .label {
    color: var(--text-muted);
    font-size: 14px;
}

.hero-visual .card-glow .price-row .value {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 15px;
}

.hero-visual .card-glow .price-row .value.green {
    color: var(--green);
}
.hero-visual .card-glow .price-row .value.red {
    color: var(--red);
}
.hero-visual .card-glow .price-row .value.gold {
    color: var(--primary);
}

.section {
    padding: 80px 0;
    position: relative;
}

.section-title {
    font-size: 38px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 14px;
    letter-spacing: -0.3px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.7;
}

.section-title .highlight {
    color: var(--primary);
}

#features {
    background: var(--bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 36px 28px;
    border: 1px solid var(--border);
    transition: all 0.35s ease;
    text-align: center;
}

.feature-card:hover {
    border-color: rgba(240, 185, 11, 0.3);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-card .icon {
    width: 56px;
    height: 56px;
    background: rgba(240, 185, 11, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    font-size: 28px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.7;
}

#products {
    background: var(--bg-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 32px 28px;
    border: 1px solid var(--border);
    transition: all 0.35s ease;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.product-card:hover::before {
    opacity: 1;
}

.product-card:hover {
    border-color: rgba(240, 185, 11, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.product-card .badge {
    display: inline-block;
    background: rgba(240, 185, 11, 0.12);
    color: var(--primary);
    padding: 2px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 14px;
}

.product-card h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.product-card p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.7;
}

.product-card .product-icon {
    font-size: 36px;
    margin-bottom: 12px;
    display: block;
}

#security {
    background: var(--bg);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.security-item {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.35s ease;
}

.security-item:hover {
    border-color: rgba(240, 185, 11, 0.25);
    transform: translateY(-4px);
}

.security-item .icon {
    font-size: 40px;
    margin-bottom: 14px;
    display: block;
}

.security-item h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.security-item p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.6;
}

#download {
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-secondary) 100%);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

#download::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(240, 185, 11, 0.04) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

#download .container {
    position: relative;
    z-index: 2;
}

#download .section-title {
    font-size: 44px;
}

#download .section-subtitle {
    margin-bottom: 40px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.download-buttons .btn {
    padding: 18px 48px;
    font-size: 18px;
    min-width: 200px;
    border-radius: 12px;
}

.download-buttons .btn .sub {
    font-size: 12px;
    font-weight: 400;
    opacity: 0.7;
    display: block;
    margin-top: 2px;
}

.download-qr {
    margin-top: 40px;
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.download-qr .qr-item {
    text-align: center;
    background: var(--bg-card);
    padding: 20px 24px 18px;
    border-radius: 16px;
    border: 1px solid var(--border);
    min-width: 120px;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform 0.2s, border-color 0.2s;
}

.download-qr .qr-item:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.download-qr .qr-item .qr-placeholder {
    width: 80px;
    height: 80px;
    background: #2B3139;
    border-radius: 8px;
    margin: 0 auto 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--text-muted);
}

.download-qr .qr-item span {
    font-size: 13px;
    color: var(--text-secondary);
}

.page-header {
    padding: 140px 0 60px;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(240, 185, 11, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.page-header .container {
    position: relative;
    z-index: 2;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.page-header h1 .highlight {
    color: var(--primary);
}

.page-header p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--text-dark);
}

.breadcrumb a {
    color: var(--text-muted);
    transition: color 0.25s ease;
}

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

.breadcrumb .separator {
    color: var(--text-dark);
}

.breadcrumb .current {
    color: var(--primary);
    font-weight: 500;
}

.category-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 32px;
}

.category-filter a {
    padding: 8px 24px;
    border-radius: 20px;
    border: 1px solid rgba(43, 49, 57, 0.6);
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    text-decoration: none;
    display: inline-block;
}

.category-filter a:hover,
.category-filter a.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(240, 185, 11, 0.08);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 28px;
}

.article-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.35s ease;
}

.article-card:hover {
    border-color: rgba(240, 185, 11, 0.3);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.article-card .article-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #2B3139, #1E2329);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.article-card .article-image::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: rgba(240, 185, 11, 0.1);
    border-radius: 50%;
}

.article-card .article-image span {
    font-size: 48px;
    position: relative;
    z-index: 2;
}

.article-card .article-content {
    padding: 24px;
}

.article-card .article-category {
    display: inline-block;
    background: rgba(240, 185, 11, 0.12);
    color: var(--primary);
    padding: 3px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.article-card .article-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card .article-title:hover {
    color: var(--primary);
}

.article-card .article-excerpt {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card .article-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-dark);
    font-size: 13px;
}

.article-card .article-meta .author {
    display: flex;
    align-items: center;
    gap: 8px;
}

.article-card .article-meta .author-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(240, 185, 11, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--primary);
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 48px;
}

.pagination button,
.pagination a {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    border: 1px solid rgba(43, 49, 57, 0.6);
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.pagination button:hover:not(:disabled),
.pagination a:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.pagination button.active,
.pagination a.active {
    background: var(--primary);
    color: var(--bg);
    border-color: var(--primary);
}

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.article-header {
    padding: 140px 0 60px;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.article-header::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(240, 185, 11, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.article-header .container {
    position: relative;
    z-index: 2;
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 24px;
    transition: color 0.25s ease;
}

.back-button:hover {
    color: var(--primary);
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    color: var(--text-dark);
    font-size: 14px;
    flex-wrap: wrap;
}

.article-meta .category {
    background: rgba(240, 185, 11, 0.12);
    color: var(--primary);
    padding: 4px 14px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
}

.article-meta .author {
    display: flex;
    align-items: center;
    gap: 8px;
}

.article-meta .author-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(240, 185, 11, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: var(--primary);
}

.article-header h1 {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 20px;
    letter-spacing: -0.5px;
    line-height: 1.15;
}

.article-header .excerpt {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    font-weight: 400;
}

.price-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 28px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
}

.price-card .price-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.price-card .price-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(240, 185, 11, 0.2), rgba(240, 185, 11, 0.05));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.price-card .price-details .label {
    font-size: 14px;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.price-card .price-details .value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.price-card .price-change {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    background: rgba(14, 203, 129, 0.12);
    color: var(--green);
    font-weight: 600;
    font-size: 16px;
}

.article-content {
    padding: 60px 0;
    background: var(--bg);
}

.article-content h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 40px 0 20px;
    letter-spacing: -0.3px;
    position: relative;
    padding-left: 20px;
}

.article-content h2:first-child {
    margin-top: 0;
}

.article-content h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: var(--primary);
    border-radius: 2px;
}

.article-content h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 32px 0 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.article-content h3::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
}

.article-content p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.article-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

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

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

.article-content ul,
.article-content ol {
    padding-left: 28px;
    margin-bottom: 24px;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.8;
}

.article-content li {
    margin-bottom: 12px;
    position: relative;
}

.article-content li::marker {
    color: var(--primary);
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 20px 28px;
    margin: 32px 0;
    background: rgba(240, 185, 11, 0.05);
    border-radius: 0 12px 12px 0;
    color: var(--text-secondary);
    font-style: italic;
    font-size: 17px;
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin: 32px 0;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-color: rgba(240, 185, 11, 0.3);
    transform: translateY(-2px);
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-muted);
}

.highlight-box {
    background: linear-gradient(135deg, rgba(240, 185, 11, 0.08), rgba(240, 185, 11, 0.02));
    border: 1px solid rgba(240, 185, 11, 0.2);
    border-radius: 12px;
    padding: 24px;
    margin: 32px 0;
}

.highlight-box h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.highlight-box h4::before {
    content: '💡';
    font-size: 20px;
}

.highlight-box p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.warning-box {
    background: rgba(246, 70, 93, 0.08);
    border: 1px solid rgba(246, 70, 93, 0.2);
    border-radius: 12px;
    padding: 24px;
    margin: 32px 0;
}

.warning-box h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--red);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.warning-box h4::before {
    content: '⚠️';
    font-size: 20px;
}

.warning-box p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.chart-container {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 24px;
    margin: 32px 0;
    border: 1px solid var(--border);
}

.chart-container .chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.chart-container .chart-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.chart-container .chart-periods {
    display: flex;
    gap: 8px;
}

.chart-container .chart-periods button {
    padding: 6px 14px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.25s ease;
    font-family: inherit;
}

.chart-container .chart-periods button.active,
.chart-container .chart-periods button:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.chart-container .chart-placeholder {
    height: 200px;
    background: linear-gradient(180deg, rgba(240, 185, 11, 0.15) 0%, rgba(240, 185, 11, 0.02) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.chart-container .chart-placeholder::before {
    content: '';
    position: absolute;
    top: 30%;
    left: 10%;
    right: 10%;
    height: 2px;
    background: rgba(240, 185, 11, 0.3);
    border-radius: 1px;
}

.chart-container .chart-placeholder::after {
    content: '';
    position: absolute;
    top: 60%;
    left: 10%;
    right: 10%;
    height: 2px;
    background: rgba(240, 185, 11, 0.2);
    border-radius: 1px;
}

.chart-container .chart-placeholder svg {
    width: 80%;
    height: 60%;
    opacity: 0.4;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.article-tags .tag {
    padding: 8px 20px;
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.article-tags .tag:hover {
    background: rgba(240, 185, 11, 0.12);
    color: var(--primary);
    border-color: rgba(240, 185, 11, 0.3);
}

.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.article-nav .nav-item {
    flex: 1;
    min-width: 0;
}

.article-nav .nav-item a {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.article-nav .nav-item a:hover {
    border-color: rgba(240, 185, 11, 0.3);
    background: rgba(240, 185, 11, 0.05);
}

.article-nav .nav-item a:hover .nav-title {
    color: var(--primary);
}

.article-nav .nav-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-dark);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.article-nav .nav-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.25s ease;
}

.article-nav .nav-item:first-child {
    align-items: flex-start;
}

.article-nav .nav-item:last-child {
    align-items: flex-end;
}

.article-nav .nav-item:first-child a {
    border-left: 3px solid var(--primary);
}

.article-nav .nav-item:last-child a {
    border-right: 3px solid var(--primary);
}

.related-articles {
    padding: 60px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}

.related-articles .container-wide {
    text-align: center;
}

.related-articles h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.related-articles p {
    color: var(--text-muted);
    font-size: 16px;
    margin-bottom: 40px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.related-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.35s ease;
    text-align: left;
}

.related-card:hover {
    border-color: rgba(240, 185, 11, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.related-card .related-image {
    width: 100%;
    height: 160px;
    background: linear-gradient(135deg, rgba(240, 185, 11, 0.1), transparent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    position: relative;
}

.related-card .related-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: linear-gradient(to top, var(--bg-card), transparent);
}

.related-card .related-content {
    padding: 24px;
}

.related-card .related-category {
    display: inline-block;
    background: rgba(240, 185, 11, 0.12);
    color: var(--primary);
    padding: 3px 12px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 12px;
}

.related-card .related-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-card .related-title:hover {
    color: var(--primary);
}

.related-card .related-date {
    color: var(--text-dark);
    font-size: 13px;
}

.footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    padding: 48px 0 32px;
}

.footer .container,
.footer .container-wide {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-brand .logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.7;
    max-width: 280px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.footer-col ul {
    list-style: none;
}

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

.footer-col ul li a {
    color: var(--text-muted);
    font-size: 14px;
    transition: color 0.25s ease;
}

.footer-col ul li a:hover {
    color: var(--primary);
}

.footer-bottom {
    grid-column: 1 / -1;
    padding-top: 24px;
    border-top: 1px solid rgba(43, 49, 57, 0.3);
    margin-top: 16px;
    text-align: center;
    color: var(--text-dark);
    font-size: 13px;
}

@media (max-width: 992px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(11, 14, 17, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 24px 32px 32px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        transition: transform 0.35s ease;
        opacity: 0;
        pointer-events: none;
        align-items: stretch;
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-links li a {
        padding: 12px 18px;
        font-size: 16px;
        display: block;
        text-align: center;
    }

    .nav-links li a.active::after {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .nav-actions .btn {
        padding: 6px 14px;
        font-size: 12px;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-stats .stat-item {
        text-align: center;
    }

    .hero-visual .card-glow {
        max-width: 100%;
    }

    .hero-content h1 {
        font-size: 40px;
    }

    .section-title {
        font-size: 30px;
    }

    .page-header h1 {
        font-size: 36px;
    }

    .articles-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .article-header h1 {
        font-size: 36px;
    }

    .article-header .excerpt {
        font-size: 18px;
    }

    .footer .container,
    .footer .container-wide {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }

    .footer-brand p {
        max-width: 100%;
    }

    .related-grid {
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    }

    .article-nav {
        flex-direction: column;
    }

    .article-nav .nav-item {
        width: 100%;
    }

    .article-nav .nav-item:first-child,
    .article-nav .nav-item:last-child {
        align-items: stretch;
    }

    .article-nav .nav-item:first-child a {
        border-left: none;
        border-top: 3px solid var(--primary);
    }

    .article-nav .nav-item:last-child a {
        border-right: none;
        border-bottom: 3px solid var(--primary);
    }
}

@media (max-width: 600px) {
    .hero {
        padding: 110px 0 60px;
        min-height: auto;
    }

    .hero-content h1 {
        font-size: 30px;
    }

    .hero-content p {
        font-size: 16px;
    }

    .hero-buttons .btn {
        padding: 14px 28px;
        font-size: 14px;
        min-width: 130px;
        width: 100%;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-stats .stat-number {
        font-size: 22px;
    }

    .section {
        padding: 50px 0;
    }

    .section-title {
        font-size: 26px;
    }

    .section-subtitle {
        font-size: 15px;
        padding: 0 12px;
    }

    .features-grid,
    .products-grid,
    .security-grid {
        grid-template-columns: 1fr;
    }

    .download-buttons .btn {
        width: 100%;
        padding: 16px 24px;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
        width: 100%;
        max-width: 320px;
        margin: 0 auto;
    }

    #download .section-title {
        font-size: 30px;
    }

    .page-header {
        padding: 110px 0 40px;
    }

    .page-header h1 {
        font-size: 28px;
    }

    .page-header p {
        font-size: 15px;
    }

    .articles-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .article-card .article-image {
        height: 160px;
    }

    .pagination button,
    .pagination a {
        width: 36px;
        height: 36px;
        font-size: 12px;
    }

    .article-header {
        padding: 110px 0 40px;
    }

    .article-header h1 {
        font-size: 28px;
    }

    .article-header .excerpt {
        font-size: 16px;
    }

    .price-card {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .price-card .price-info {
        flex-direction: column;
    }

    .article-content {
        padding: 40px 0;
    }

    .article-content h2 {
        font-size: 22px;
        padding-left: 16px;
    }

    .article-content h3 {
        font-size: 18px;
    }

    .article-content p {
        font-size: 15px;
    }

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

    .stat-card .stat-value {
        font-size: 22px;
    }

    .related-articles {
        padding: 40px 0;
    }

    .related-articles h3 {
        font-size: 22px;
    }

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

    .footer .container,
    .footer .container-wide {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-col {
        text-align: center;
    }

    .footer-brand .logo-text {
        justify-content: center;
    }

    .navbar {
        padding: 0 16px;
        height: 64px;
    }

    .nav-logo {
        font-size: 18px;
    }

    .nav-logo svg {
        width: 26px;
        height: 26px;
    }

    .nav-links {
        top: 64px;
        padding: 16px 20px 24px;
    }

    .hero-visual .card-glow {
        padding: 24px 18px;
    }

    .download-qr {
        gap: 16px;
    }

    .download-qr .qr-item {
        padding: 14px 16px 12px;
        min-width: 100px;
    }
}

@media (max-width: 380px) {
    .hero-content h1 {
        font-size: 26px;
    }

    .nav-actions .btn {
        font-size: 10px;
        padding: 4px 8px;
    }

    .nav-actions .btn-sm {
        padding: 4px 8px;
    }
}