/* ===== 基础样式重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1A73E8;
    --primary-dark: #1557B0;
    --primary-light: #E8F0FE;
    --secondary: #5F6368;
    --text: #202124;
    --text-light: #5F6368;
    --bg: #FFFFFF;
    --bg-light: #F8F9FA;
    --border: #DADCE0;
    --success: #34A853;
    --warning: #FBBC04;
    --error: #EA4335;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ===== 导航栏 ===== */
.header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    width: 36px;
    height: 36px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    color: var(--text-light);
    padding: 8px 0;
    position: relative;
    transition: color 0.3s;
}

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--primary);
    color: white;
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 20px;
    z-index: 999;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 12px 0;
    font-size: 16px;
    color: var(--text-light);
    border-bottom: 1px solid var(--border);
}

.mobile-menu a:last-child {
    border-bottom: none;
}

.mobile-menu a.active {
    color: var(--primary);
}

/* ===== Hero 区域 ===== */
.hero {
    background: linear-gradient(135deg, #E8F0FE 0%, #FFFFFF 50%, #E8F0FE 100%);
}

.hero-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    padding: 80px 0;
}

.hero-content {
    flex: 0 1 580px;
}

.hero-image {
    flex: 0 1 480px;
}

.hero-title {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.15;
    color: var(--text);
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 36px;
    max-width: 520px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 48px;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--primary);
    color: white;
    font-size: 16px;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s;
}

.btn-download svg {
    width: 20px;
    height: 20px;
}

.btn-download:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(26, 115, 232, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: white;
    color: var(--primary);
    font-size: 16px;
    font-weight: 600;
    border-radius: 12px;
    border: 2px solid var(--primary);
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: var(--primary-light);
}

.hero-stats {
    display: flex;
    gap: 56px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 4px;
}

.hero-mockup {
    width: 100%;
    max-width: 460px;
    height: 340px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.12);
    overflow: hidden;
}

.mockup-header {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    background: #F1F3F4;
}

.mockup-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.mockup-dot.red { background: #EA4335; }
.mockup-dot.yellow { background: #FBBC04; }
.mockup-dot.green { background: #34A853; }

.mockup-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: calc(100% - 36px);
    gap: 24px;
}

.app-icon {
    width: 80px;
    height: 80px;
    background: var(--primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    font-weight: 700;
    color: white;
}

.app-icons {
    display: flex;
    gap: 16px;
}

.app-doc, .app-sheet, .app-slide {
    width: 48px;
    height: 48px;
    border-radius: 8px;
}

.app-doc { background: #4285F4; }
.app-sheet { background: #34A853; }
.app-slide { background: #FBBC04; }

/* ===== 产品特点 ===== */
.features {
    padding: 100px 0;
    background: var(--bg);
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 56px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    padding: 36px;
    background: var(--bg-light);
    border-radius: 20px;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.feature-icon.blue { background: #4285F4; }
.feature-icon.green { background: #34A853; }
.feature-icon.orange { background: #FBBC04; }
.feature-icon.purple { background: #9C27B0; }
.feature-icon.red { background: #EA4335; }
.feature-icon.cyan { background: #00BCD4; }

.feature-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* ===== 下载区域 ===== */
.download-section {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg) 100%);
}

.download-box {
    display: flex;
    align-items: center;
    gap: 80px;
    padding: 56px;
    background: white;
    border-radius: 24px;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.08);
}

.download-info {
    flex: 1;
}

.download-info h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.download-info .version {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 28px;
}

.download-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.download-features li {
    font-size: 16px;
    color: var(--text);
}

.download-actions {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.platform-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 16px;
    background: var(--bg-light);
    border-radius: 16px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.platform-btn:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

.platform-btn svg {
    width: 32px;
    height: 32px;
}

.platform-btn.windows svg { color: #00A4EF; }
.platform-btn.mac svg { color: #000000; }
.platform-btn.linux svg { color: #FCC624; }

.mobile-qr {
    text-align: center;
    padding: 24px;
    background: var(--bg-light);
    border-radius: 12px;
}

.mobile-qr p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.qr-code {
    width: 120px;
    height: 120px;
    margin: 0 auto;
    background: white;
    padding: 8px;
    border-radius: 8px;
}

.qr-code svg {
    width: 100%;
    height: 100%;
}

/* ===== 底部 ===== */
.footer {
    background: #1F1F1F;
    color: white;
    padding: 80px 0 32px;
}

.footer-top {
    display: flex;
    gap: 80px;
    margin-bottom: 56px;
}

.footer-brand {
    flex: 1;
    max-width: 280px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo img {
    width: 44px;
    height: 44px;
}

.footer-logo span {
    font-size: 22px;
    font-weight: 600;
}

.footer-brand p {
    font-size: 14px;
    color: #9AA0A6;
    line-height: 1.8;
}

.footer-links {
    flex: 2;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-column a {
    display: block;
    font-size: 14px;
    color: #9AA0A6;
    padding: 6px 0;
    transition: color 0.3s;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid #3C4043;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    font-size: 13px;
    color: #9AA0A6;
}

.footer-bottom a {
    color: #9AA0A6;
}

.footer-bottom a:hover {
    color: white;
}

/* ===== 下载页面 ===== */
.download-page {
    padding: 80px 0;
    background: var(--bg-light);
    min-height: calc(100vh - 200px);
}

.page-header {
    text-align: center;
    margin-bottom: 56px;
}

.page-header h1 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 14px;
}

.page-header p {
    font-size: 18px;
    color: var(--text-light);
}

.version-selector {
    display: flex;
    justify-content: center;
    margin-bottom: 48px;
}

.version-info {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 16px 28px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.version-tag {
    padding: 6px 14px;
    background: var(--success);
    color: white;
    font-size: 13px;
    font-weight: 600;
    border-radius: 6px;
}

.version-number {
    font-size: 18px;
    font-weight: 600;
}

.version-date {
    font-size: 14px;
    color: var(--text-light);
}

.platform-cards {
    display: grid;
    gap: 24px;
    margin-bottom: 72px;
}

.platform-card {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 40px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.3s;
}

.platform-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
    transform: translateY(-3px);
}

.platform-icon {
    width: 88px;
    height: 88px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.platform-icon svg {
    width: 44px;
    height: 44px;
}

.windows-icon { background: #E8F0FE; }
.windows-icon svg { color: #00A4EF; }
.mac-icon { background: #F1F3F4; }
.mac-icon svg { color: #1F1F1F; }
.linux-icon { background: #FEF7E0; }
.linux-icon svg { color: #FCC624; }
.china-icon { background: #FCE8E6; }
.china-icon svg { color: #EA4335; }

.platform-info {
    flex: 1;
}

.platform-info h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 6px;
}

.platform-version {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.platform-features {
    display: flex;
    gap: 28px;
}

.platform-features li {
    font-size: 14px;
    color: var(--text-light);
}

.platform-action {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-download-full {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 36px;
    background: var(--primary);
    color: white;
    font-size: 16px;
    font-weight: 500;
    border-radius: 10px;
    transition: all 0.3s;
}

.btn-download-full svg {
    width: 22px;
    height: 22px;
}

.btn-download-full:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 16px rgba(26, 115, 232, 0.3);
}

.btn-history {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text-light);
    transition: color 0.3s;
}

.btn-history:hover {
    color: var(--primary);
}

.mobile-download {
    margin-bottom: 72px;
}

.mobile-download h2 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 32px;
}

.mobile-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.mobile-card {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 28px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.mobile-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-light);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.mobile-icon.apple {
    background: #F1F3F4;
}

.mobile-icon.apple svg {
    color: #1F1F1F;
}

.mobile-info {
    flex: 1;
}

.mobile-info h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 6px;
}

.mobile-info p {
    font-size: 15px;
    color: var(--text-light);
}

.btn-mobile {
    padding: 12px 24px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 15px;
    font-weight: 500;
    border-radius: 10px;
    transition: all 0.3s;
}

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

.install-guide {
    margin-bottom: 72px;
}

.install-guide h2 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.step {
    display: flex;
    gap: 20px;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    font-size: 20px;
    font-weight: 600;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.step-content p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.6;
}

.faq-section h2 {
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 16px;
    margin-bottom: 16px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.faq-item summary {
    padding: 24px 28px;
    font-size: 17px;
    font-weight: 500;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 26px;
    font-weight: 300;
    color: var(--text-light);
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    padding: 0 28px 24px;
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ===== 404页面 ===== */
.error-page {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg) 100%);
}

.error-content {
    text-align: center;
    max-width: 600px;
}

.error-illustration {
    position: relative;
    margin-bottom: 40px;
}

.error-number {
    font-size: 140px;
    font-weight: 800;
    color: var(--border);
    line-height: 1;
}

.error-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: var(--warning);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.error-document {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    padding: 12px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.doc-line {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    margin-bottom: 6px;
}

.doc-line.short {
    width: 60%;
}

.doc-line.medium {
    width: 80%;
}

.doc-line:last-child {
    margin-bottom: 0;
}

.error-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

.error-message {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 32px;
}

.error-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 40px;
}

.btn-error-primary,
.btn-error-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s;
}

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

.btn-error-primary:hover {
    background: var(--primary-dark);
}

.btn-error-secondary {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-error-secondary:hover {
    background: var(--primary-light);
}

.btn-error-primary svg,
.btn-error-secondary svg {
    width: 18px;
    height: 18px;
}

.error-search {
    margin-bottom: 40px;
}

.error-search p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.search-box {
    display: flex;
    max-width: 400px;
    margin: 0 auto;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.search-box input {
    flex: 1;
    padding: 12px 16px;
    border: none;
    font-size: 15px;
    outline: none;
}

.search-box button {
    padding: 12px 16px;
    background: var(--primary);
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

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

.search-box button svg {
    width: 20px;
    height: 20px;
    color: white;
}

.quick-links h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.quick-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: all 0.3s;
}

.quick-link:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.quick-link svg {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.quick-link span {
    font-size: 14px;
    font-weight: 500;
}

.footer-minimal .footer-bottom {
    border-top: none;
    flex-direction: column;
    gap: 12px;
}

.footer-nav {
    display: flex;
    gap: 24px;
}

.footer-nav a {
    font-size: 13px;
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 0 32px;
    }
}

@media (max-width: 1024px) {
    .hero-wrapper {
        flex-direction: column;
        text-align: center;
        padding: 50px 0 60px;
        gap: 40px;
    }

    .hero-content {
        flex: none;
        max-width: 100%;
    }

    .hero-image {
        flex: none;
        width: 100%;
        max-width: 380px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        max-width: 100%;
    }

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

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

    .hero-mockup {
        max-width: 380px;
        height: 280px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .features {
        padding: 70px 0;
    }

    .section-title {
        font-size: 32px;
    }

    .download-box {
        flex-direction: column;
        padding: 40px;
        gap: 40px;
    }

    .download-section {
        padding: 70px 0;
    }

    .footer-top {
        flex-direction: column;
        gap: 48px;
    }

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

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .platform-card {
        flex-wrap: wrap;
        padding: 32px;
    }

    .platform-action {
        width: 100%;
        flex-direction: row;
        justify-content: flex-start;
        gap: 16px;
    }

    .guide-steps {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .page-header h1 {
        font-size: 32px;
    }

    .platform-cards {
        margin-bottom: 56px;
    }

    .mobile-download h2,
    .install-guide h2,
    .faq-section h2 {
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .header-right {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

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

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

    .section-title {
        font-size: 28px;
    }

    .platform-buttons {
        flex-direction: column;
    }

    .mobile-cards {
        grid-template-columns: 1fr;
    }

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

    .error-number {
        font-size: 100px;
    }

    .error-title {
        font-size: 22px;
    }

    .error-actions {
        flex-direction: column;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-wrapper {
        padding: 40px 0 50px;
        gap: 32px;
    }

    .hero-mockup {
        height: 220px;
    }

    .platform-features {
        flex-direction: column;
        gap: 8px;
    }
}