/* css/style.min.css - bit钱包官网完整样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #7c3aed;
    --accent: #06b6d4;
    --dark: #0f172a;
    --light: #f8fafc;
    --gray: #64748b;
    --gray-light: #e2e8f0;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: #fff;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 头部样式 */
.site-header {
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.header-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo img {
    height: 40px;
    width: auto;
    display: block;
}

/* 导航菜单 */
.main-nav {
    flex: 1;
    margin: 0 40px;
}

.nav-list {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    font-size: 16px;
    transition: color 0.3s;
    position: relative;
    padding: 8px 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 头部按钮 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-download {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 10px 24px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s;
    white-space: nowrap;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(102,126,234,0.4);
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102,126,234,0.5);
}

.highlight {
    position: relative;
    overflow: hidden;
}

.highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.highlight:hover::before {
    left: 100%;
}

/* 移动菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 100;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background: var(--dark);
    margin: 3px 0;
    transition: all 0.3s;
    border-radius: 3px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* 英雄区 */
.hero-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 20px;
    color: var(--gray);
    margin-bottom: 24px;
}

.hero-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 32px;
}

.keyword {
    background: rgba(102,126,234,0.1);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid rgba(102,126,234,0.3);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 16px 32px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(102,126,234,0.4);
    border: none;
    cursor: pointer;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(102,126,234,0.5);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    padding: 14px 30px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    border: 2px solid var(--primary);
    transition: all 0.3s;
    display: inline-block;
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.btn-large {
    padding: 18px 40px;
    font-size: 18px;
}

.trust-badge {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.trust-badge span {
    color: var(--gray);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.hero-image img {
    width: 100%;
    max-width: 520px;
    height: auto;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* 通用区块样式 */
.section-padding {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title p {
    font-size: 18px;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

.bg-light {
    background-color: #f8fafc;
}

/* 功能模块 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-item {
    background: white;
    padding: 40px 24px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
    transition: all 0.3s;
    border: 1px solid rgba(0,0,0,0.03);
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(102,126,234,0.15);
    border-color: var(--primary);
}

.feature-item img {
    width: 64px;
    height: 64px;
    margin-bottom: 24px;
}

.feature-item h3 {
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--dark);
}

.feature-item p {
    color: var(--gray);
    font-size: 15px;
    line-height: 1.6;
}

/* Difi专区 */
.defi-showcase {
    margin-bottom: 60px;
}

.defi-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 50px;
    flex-wrap: wrap;
    gap: 30px;
}

.stat-block {
    text-align: center;
}

.stat-value {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    display: block;
    line-height: 1.2;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 16px;
    color: var(--gray);
}

.defi-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.defi-logos img {
    height: 40px;
    width: auto;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all 0.3s;
}

.defi-logos img:hover {
    filter: grayscale(0);
    opacity: 1;
}

/* 多链快速入口 */
.multichain-quick {
    margin-top: 60px;
    text-align: center;
}

.multichain-quick h3 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--dark);
}

.chain-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 15px;
    max-width: 800px;
    margin: 0 auto;
}

.chain-card {
    background: white;
    padding: 15px 10px;
    border-radius: 12px;
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    font-size: 14px;
    border: 1px solid var(--gray-light);
    transition: all 0.3s;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.chain-card:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(102,126,234,0.3);
}

/* 帮助中心 */
.help-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-bottom: 40px;
}

.help-card {
    background: white;
    padding: 30px 20px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.02);
    transition: all 0.3s;
}

.help-card:hover {
    box-shadow: 0 15px 40px rgba(102,126,234,0.1);
    transform: translateY(-5px);
}

.help-card h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--dark);
}

.help-card p {
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.6;
}

.read-more {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.read-more:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.help-more-link {
    text-align: center;
}

.btn-secondary {
    background: var(--primary);
    color: white;
    padding: 14px 32px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    display: inline-block;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(37,99,235,0.3);
}

/* 新闻预览 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.news-item {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.3s;
    border: 1px solid rgba(0,0,0,0.02);
}

.news-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(102,126,234,0.15);
}

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

.news-content {
    padding: 24px;
}

.news-date {
    color: var(--gray);
    font-size: 13px;
    display: block;
    margin-bottom: 12px;
}

.news-content h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--dark);
    line-height: 1.4;
}

.news-content p {
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 16px;
    line-height: 1.6;
}

.news-more {
    text-align: center;
}

/* 下载区 */
.download-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.download-flex {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.download-text h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
}

.download-text .large {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.download-features {
    list-style: none;
    margin-bottom: 40px;
}

.download-features li {
    margin-bottom: 12px;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.qrcode-download {
    text-align: center;
    display: inline-block;
}

.qrcode-download img {
    width: 140px;
    height: 140px;
    border-radius: 16px;
    margin-bottom: 10px;
    background: white;
    padding: 10px;
}

.qrcode-download p {
    font-size: 14px;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
}

.store-button {
    transition: all 0.3s;
    display: inline-block;
}

.store-button:hover {
    transform: translateY(-5px);
    opacity: 0.9;
}

.store-button img {
    height: 60px;
    width: auto;
}

.direct-apk {
    background: rgba(255,255,255,0.2);
    color: white;
    padding: 14px 30px;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    border: 1px solid rgba(255,255,255,0.3);
    backdrop-filter: blur(5px);
}

.note {
    font-size: 12px;
    opacity: 0.7;
    margin-top: 10px;
}

/* 页脚 */
.site-footer {
    background: var(--dark);
    color: white;
    padding: 80px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-col img {
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
}

.footer-col p {
    color: #94a3b8;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 10px;
}

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: white;
}

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

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 30px;
    text-align: center;
}

.seo-footer-keywords {
    color: #64748b;
    font-size: 12px;
    letter-spacing: 0.5px;
}

/* 内部页面样式 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumb {
    margin-top: 20px;
    color: rgba(255,255,255,0.8);
}

.breadcrumb a {
    color: white;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* 关于我们页面 */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--dark);
}

.about-content p {
    color: var(--gray);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.about-stat-item {
    text-align: center;
}

.about-stat-item .number {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    display: block;
}

.about-stat-item .label {
    color: var(--gray);
    font-size: 14px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.team-member {
    text-align: center;
}

.team-member img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin-bottom: 16px;
    border: 3px solid var(--primary);
}

.team-member h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.team-member p {
    color: var(--gray);
    font-size: 14px;
}

/* 帮助中心页面 */
.help-search {
    max-width: 600px;
    margin: 40px auto;
    display: flex;
    gap: 10px;
}

.help-search input {
    flex: 1;
    padding: 16px 24px;
    border: 1px solid var(--gray-light);
    border-radius: 40px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.help-search input:focus {
    border-color: var(--primary);
}

.help-search button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0 40px;
    border-radius: 40px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.help-search button:hover {
    background: var(--primary-dark);
}

.help-categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 60px 0;
}

.category-card {
    background: white;
    padding: 30px 20px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: all 0.3s;
    cursor: pointer;
    border: 1px solid rgba(0,0,0,0.02);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(102,126,234,0.1);
}

.category-card .emoji {
    font-size: 36px;
    margin-bottom: 16px;
    display: block;
}

.category-card h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.category-card p {
    color: var(--gray);
    font-size: 13px;
}

.faq-section {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
}

.faq-item {
    border-bottom: 1px solid var(--gray-light);
    padding: 20px 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    font-size: 18px;
}

.faq-question .toggle {
    font-size: 24px;
    color: var(--primary);
}

.faq-answer {
    margin-top: 16px;
    color: var(--gray);
    line-height: 1.8;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-item.active .toggle {
    transform: rotate(45deg);
}

/* 联系我们页面 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.info-icon {
    width: 50px;
    height: 50px;
    background: rgba(102,126,234,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.info-content h3 {
    font-size: 18px;
    margin-bottom: 5px;
}

.info-content p {
    color: var(--gray);
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--gray-light);
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102,126,234,0.1);
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.submit-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 16px 40px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102,126,234,0.3);
}

/* 新闻列表页 */
.news-list {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

.news-main .news-item-large {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.news-item-large img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.news-item-large .news-content {
    padding: 40px;
}

.news-item-large h2 {
    font-size: 28px;
    margin-bottom: 16px;
}

.news-item-large p {
    font-size: 16px;
    margin-bottom: 24px;
}

.news-sidebar {
    background: white;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    position: sticky;
    top: 100px;
}

.sidebar-widget {
    margin-bottom: 40px;
}

.sidebar-widget h3 {
    font-size: 20px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
}

.category-list {
    list-style: none;
}

.category-list li {
    margin-bottom: 12px;
}

.category-list a {
    color: var(--gray);
    text-decoration: none;
    display: flex;
    justify-content: space-between;
    transition: color 0.3s;
}

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

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    background: #f1f5f9;
    color: var(--gray);
    padding: 6px 12px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 13px;
    transition: all 0.3s;
}

.tag:hover {
    background: var(--primary);
    color: white;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .help-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-flex {
        height: 70px;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        transition: left 0.3s ease;
        margin: 0;
        overflow-y: auto;
        z-index: 999;
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        padding: 40px 24px;
        gap: 20px;
    }
    
    .nav-link {
        font-size: 18px;
        display: block;
        padding: 12px 0;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-large {
        width: 100%;
        text-align: center;
    }
    
    .section-title h2 {
        font-size: 32px;
    }
    
    .features-grid,
    .help-grid,
    .news-grid,
    .footer-grid,
    .about-grid,
    .contact-grid,
    .news-list,
    .help-categories {
        grid-template-columns: 1fr;
    }
    
    .download-flex {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .download-buttons {
        align-items: center;
    }
    
    .chain-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        gap: 30px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .page-header h1 {
        font-size: 32px;
    }
    
    .help-search {
        flex-direction: column;
    }
    
    .help-search button {
        padding: 16px;
    }
    
    .contact-info,
    .contact-form {
        padding: 30px 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-content h1 {
        font-size: 28px;
    }
    
    .hero-sub {
        font-size: 16px;
    }
    
    .trust-badge {
        flex-direction: column;
        gap: 10px;
    }
    
    .chain-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
}