:root {
    --color-bg: #f9fafc;
    --color-bg-elevated: #ffffff;
    --color-bg-header: rgba(255, 255, 255, 0.92);
    --color-bg-footer: #0b0f1a;
    --color-bg-footer-dark: #060a12;
    --color-text: #1e1e2f;
    --color-text-secondary: #3d3d52;
    --color-text-muted: #5a5a6e;
    --color-text-light: #94a3b8;
    --color-border: #eef0f4;
    --color-border-light: #e9ecf0;
    --color-primary: #2a6df4;
    --color-primary-dark: #1a5ad9;
    --color-primary-light: #7aa9ff;
    --color-accent: #7b2ff7;
    --color-gradient-start: #2a6df4;
    --color-gradient-end: #7b2ff7;
    --color-shadow: rgba(0, 0, 0, 0.04);
    --color-shadow-hover: rgba(0, 0, 0, 0.08);
    --color-overlay: rgba(0, 0, 0, 0.5);
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --radius-pill: 60px;
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.6s ease;
    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

body.dark-mode {
    --color-bg: #0b0f1a;
    --color-bg-elevated: #111827;
    --color-bg-header: rgba(11, 15, 26, 0.92);
    --color-bg-footer: #060a12;
    --color-bg-footer-dark: #03060c;
    --color-text: #e5e9f0;
    --color-text-secondary: #b0b8c5;
    --color-text-muted: #9aa2b1;
    --color-text-light: #64748b;
    --color-border: #1f2937;
    --color-border-light: #1f2937;
    --color-primary: #7aa9ff;
    --color-primary-dark: #5a8fee;
    --color-primary-light: #a8c7ff;
    --color-accent: #a78bfa;
    --color-gradient-start: #7aa9ff;
    --color-gradient-end: #a78bfa;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-hover: rgba(0, 0, 0, 0.5);
    --color-overlay: rgba(0, 0, 0, 0.7);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

body.dark-mode {
    background-color: var(--color-bg);
    color: var(--color-text);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

body.dark-mode a {
    color: var(--color-primary-light);
}

body.dark-mode a:hover {
    color: var(--color-primary);
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

ul,
ol {
    list-style: none;
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-bg-header);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

body.dark-mode .site-header {
    border-bottom-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-text);
    letter-spacing: -0.01em;
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.85;
    color: var(--color-text);
}

body.dark-mode .logo {
    color: #ffffff;
}

body.dark-mode .logo:hover {
    color: #ffffff;
}

.logo svg {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.nav-menu {
    display: flex;
    gap: 28px;
    list-style: none;
}

.nav-menu a {
    font-weight: 500;
    color: var(--color-text);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
    border-radius: 2px;
    transition: width var(--transition-base);
}

.nav-menu a:hover::after {
    width: 100%;
}

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

body.dark-mode .nav-menu a {
    color: #cbd5e1;
}

body.dark-mode .nav-menu a:hover {
    color: var(--color-primary-light);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-btn,
.theme-toggle,
.menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: background var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
}

.search-btn:hover,
.theme-toggle:hover,
.menu-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
    transform: scale(1.05);
}

.search-btn:active,
.theme-toggle:active,
.menu-toggle:active {
    transform: scale(0.95);
}

body.dark-mode .search-btn,
body.dark-mode .theme-toggle,
body.dark-mode .menu-toggle {
    color: #cbd5e1;
}

body.dark-mode .search-btn:hover,
body.dark-mode .theme-toggle:hover,
body.dark-mode .menu-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.menu-toggle {
    display: none;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg-elevated);
    padding: 20px 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    z-index: 99;
    flex-direction: column;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

body.dark-mode .mobile-menu {
    background: var(--color-bg-elevated);
    border-bottom-color: var(--color-border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

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

.mobile-menu a {
    font-size: 1.1rem;
    font-weight: 500;
    padding: 10px 0;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    transition: color var(--transition-fast), padding-left var(--transition-fast);
}

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

.mobile-menu a:hover {
    color: var(--color-primary);
    padding-left: 8px;
}

body.dark-mode .mobile-menu a {
    color: var(--color-text);
}

body.dark-mode .mobile-menu a:hover {
    color: var(--color-primary-light);
}

.breadcrumb {
    padding: 16px 0 8px;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

body.dark-mode .breadcrumb {
    color: var(--color-text-muted);
}

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

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

body.dark-mode .breadcrumb a {
    color: var(--color-primary-light);
}

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

.hero {
    padding: 40px 0 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.hero-content h1 {
    font-size: 2.8rem;
    line-height: 1.2;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-content h1 span {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
    max-width: 560px;
}

body.dark-mode .hero-content p {
    color: var(--color-text-secondary);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: #ffffff;
    padding: 14px 32px;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(42, 109, 244, 0.3);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(42, 109, 244, 0.4);
    color: #ffffff;
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    padding: 14px 32px;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 1rem;
    border: 1.5px solid #d0d5dd;
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast), color var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

body.dark-mode .btn-secondary {
    color: var(--color-text);
    border-color: #374151;
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    background: rgba(42, 109, 244, 0.05);
    transform: translateY(-2px);
    color: var(--color-primary);
}

body.dark-mode .btn-secondary:hover {
    background: rgba(122, 169, 255, 0.1);
    color: var(--color-primary-light);
}

.btn-secondary:active {
    transform: translateY(0);
}

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

.hero-visual svg {
    width: 100%;
    max-width: 480px;
    height: auto;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 20px 40px rgba(42, 109, 244, 0.15));
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-16px);
    }
}

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 32px 0 48px;
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}

body.dark-mode .stats {
    border-color: var(--color-border);
}

.stat-item {
    text-align: center;
    transition: transform var(--transition-base);
}

.stat-item:hover {
    transform: translateY(-4px);
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

body.dark-mode .stat-label {
    color: var(--color-text-muted);
}

section {
    padding: 64px 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 48px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
    border-radius: 3px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    max-width: 720px;
    margin-top: 16px;
}

body.dark-mode .section-subtitle {
    color: var(--color-text-muted);
}

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

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

.card {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    box-shadow: 0 4px 16px var(--color-shadow);
    border: 1px solid var(--color-border);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

body.dark-mode .card {
    background: var(--color-bg-elevated);
    border-color: var(--color-border);
    box-shadow: 0 4px 16px var(--color-shadow);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px var(--color-shadow-hover);
    border-color: rgba(42, 109, 244, 0.2);
}

body.dark-mode .card:hover {
    box-shadow: 0 16px 40px var(--color-shadow-hover);
    border-color: rgba(122, 169, 255, 0.2);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(42, 109, 244, 0.1), rgba(123, 47, 247, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: transform var(--transition-base), background var(--transition-base);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(-4deg);
    background: linear-gradient(135deg, rgba(42, 109, 244, 0.18), rgba(123, 47, 247, 0.18));
}

body.dark-mode .card-icon {
    background: linear-gradient(135deg, rgba(122, 169, 255, 0.15), rgba(167, 139, 250, 0.15));
}

body.dark-mode .card:hover .card-icon {
    background: linear-gradient(135deg, rgba(122, 169, 255, 0.25), rgba(167, 139, 250, 0.25));
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.card p {
    color: var(--color-text-secondary);
    font-size: 0.98rem;
}

body.dark-mode .card p {
    color: var(--color-text-secondary);
}

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

.article-item {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--color-border);
    transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
    position: relative;
    overflow: hidden;
}

.article-item::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--color-gradient-start), var(--color-gradient-end));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.article-item:hover::after {
    opacity: 1;
}

body.dark-mode .article-item {
    background: var(--color-bg-elevated);
    border-color: var(--color-border);
}

.article-item:hover {
    box-shadow: 0 12px 32px var(--color-shadow-hover);
    transform: translateY(-4px);
    border-color: rgba(42, 109, 244, 0.15);
}

body.dark-mode .article-item:hover {
    border-color: rgba(122, 169, 255, 0.15);
}

.article-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 8px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

body.dark-mode .article-meta {
    color: var(--color-text-muted);
}

.article-meta span {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    background: rgba(42, 109, 244, 0.08);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--color-primary);
}

body.dark-mode .article-meta span {
    background: rgba(122, 169, 255, 0.12);
    color: var(--color-primary-light);
}

.article-item h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.article-item:hover h3 {
    color: var(--color-primary);
}

body.dark-mode .article-item:hover h3 {
    color: var(--color-primary-light);
}

.article-item p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

body.dark-mode .article-item p {
    color: var(--color-text-secondary);
}

.read-more {
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--transition-fast), color var(--transition-fast);
}

.read-more:hover {
    gap: 8px;
    color: var(--color-primary-dark);
}

body.dark-mode .read-more:hover {
    color: var(--color-primary-light);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--color-bg-elevated);
    border-radius: 14px;
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

body.dark-mode .faq-item {
    background: var(--color-bg-elevated);
    border-color: var(--color-border);
}

.faq-item:hover {
    border-color: rgba(42, 109, 244, 0.2);
}

body.dark-mode .faq-item:hover {
    border-color: rgba(122, 169, 255, 0.2);
}

.faq-item.active {
    border-color: rgba(42, 109, 244, 0.3);
    box-shadow: 0 4px 16px var(--color-shadow);
}

body.dark-mode .faq-item.active {
    border-color: rgba(122, 169, 255, 0.3);
}

.faq-question {
    padding: 20px 24px;
    font-weight: 600;
    font-size: 1.05rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    color: var(--color-text);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.faq-question:hover {
    background: rgba(42, 109, 244, 0.03);
}

body.dark-mode .faq-question:hover {
    background: rgba(122, 169, 255, 0.05);
}

.faq-answer {
    padding: 0 24px 20px;
    color: var(--color-text-secondary);
    font-size: 0.98rem;
    display: none;
    border-top: 1px solid var(--color-border);
    padding-top: 16px;
    margin-top: 0;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

body.dark-mode .faq-answer {
    color: var(--color-text-secondary);
    border-top-color: var(--color-border);
}

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

.faq-icon {
    transition: transform var(--transition-base);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
    color: var(--color-primary);
}

.howto-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
    counter-reset: step;
}

.howto-step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--color-border);
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

body.dark-mode .howto-step {
    background: var(--color-bg-elevated);
    border-color: var(--color-border);
}

.howto-step:hover {
    transform: translateX(6px);
    box-shadow: 0 8px 24px var(--color-shadow);
    border-color: rgba(42, 109, 244, 0.15);
}

body.dark-mode .howto-step:hover {
    border-color: rgba(122, 169, 255, 0.15);
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(42, 109, 244, 0.3);
    transition: transform var(--transition-base);
}

.howto-step:hover .step-number {
    transform: scale(1.1);
}

.step-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--color-text);
}

.step-content p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

body.dark-mode .step-content p {
    color: var(--color-text-secondary);
}

.banner-carousel {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: 40px;
    background: linear-gradient(135deg, #1a1f36, #0b0f1a);
    min-height: 240px;
    box-shadow: 0 20px 60px rgba(11, 15, 26, 0.3);
}

.banner-carousel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(42, 109, 244, 0.25), transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(123, 47, 247, 0.25), transparent 60%);
    pointer-events: none;
    z-index: 1;
}

.carousel-slide {
    display: none;
    padding: 48px 40px;
    color: #ffffff;
    min-height: 240px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.carousel-slide.active {
    display: flex;
    animation: carouselFade 0.6s ease;
}

@keyframes carouselFade {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.carousel-slide h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #ffffff, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.carousel-slide p {
    font-size: 1rem;
    color: #cbd5e1;
    max-width: 600px;
}

.carousel-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast), width var(--transition-base);
    padding: 0;
}

.carousel-dot:hover {
    background: rgba(255, 255, 255, 0.7);
    transform: scale(1.2);
}

.carousel-dot.active {
    background: #ffffff;
    width: 28px;
    border-radius: 6px;
}

.fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.site-footer {
    background: var(--color-bg-footer);
    color: #cbd5e1;
    padding: 64px 0 32px;
    margin-top: 40px;
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(42, 109, 244, 0.5), transparent);
}

body.dark-mode .site-footer {
    background: var(--color-bg-footer-dark);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-light);
    margin-top: 16px;
    max-width: 320px;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 24px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
    border-radius: 2px;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col a {
    color: var(--color-text-light);
    font-size: 0.92rem;
    transition: color var(--transition-fast), padding-left var(--transition-fast);
    position: relative;
}

.footer-col a:hover {
    color: #ffffff;
    padding-left: 6px;
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.88rem;
    color: #64748b;
}

.footer-bottom a {
    color: var(--color-text-light);
    transition: color var(--transition-fast);
}

.footer-bottom a:hover {
    color: #ffffff;
}

.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(42, 109, 244, 0.4);
    transition: transform var(--transition-fast), opacity var(--transition-fast), box-shadow var(--transition-fast);
    z-index: 90;
}

.back-to-top:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 24px rgba(42, 109, 244, 0.5);
}

.back-to-top:active {
    transform: translateY(-2px) scale(1);
}

.back-to-top.visible {
    display: flex;
    animation: popIn 0.3s ease;
}

@keyframes popIn {
    from {
        opacity: 0;
        transform: scale(0.5);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.search-modal.open {
    display: flex;
    animation: modalFade 0.25s ease;
}

@keyframes modalFade {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.search-box {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    padding: 32px;
    width: 90%;
    max-width: 560px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.2);
    animation: modalSlideUp 0.3s ease;
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

body.dark-mode .search-box {
    background: var(--color-bg-elevated);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6);
}

.search-box input {
    width: 100%;
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border: 1.5px solid #d0d5dd;
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    background: transparent;
    color: var(--color-text);
    font-family: inherit;
}

body.dark-mode .search-box input {
    border-color: #374151;
    color: var(--color-text);
}

.search-box input::placeholder {
    color: var(--color-text-muted);
}

.search-box input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(42, 109, 244, 0.12);
}

body.dark-mode .search-box input:focus {
    box-shadow: 0 0 0 4px rgba(122, 169, 255, 0.15);
}

.search-box .close-search {
    margin-top: 16px;
    display: flex;
    justify-content: flex-end;
}

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

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

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

    .hero-visual {
        order: -1;
    }

    .hero-visual svg {
        max-width: 360px;
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .section-title {
        font-size: 1.8rem;
    }
}

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

    .menu-toggle {
        display: flex;
    }

    .header-inner {
        height: 64px;
    }

    .mobile-menu {
        top: 64px;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .grid-3,
    .grid-2,
    .article-list {
        grid-template-columns: 1fr;
    }

    .hero {
        padding: 24px 0 40px;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .section-subtitle {
        font-size: 0.98rem;
    }

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

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

    .carousel-slide {
        padding: 32px 24px;
    }

    .carousel-slide h3 {
        font-size: 1.4rem;
    }

    .carousel-slide p {
        font-size: 0.92rem;
    }

    .howto-step {
        padding: 20px;
        gap: 16px;
    }

    .step-number {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .back-to-top {
        bottom: 24px;
        right: 24px;
        width: 44px;
        height: 44px;
    }

    .search-box {
        padding: 24px;
    }

    section {
        padding: 48px 0;
    }

    .card {
        padding: 24px 20px;
    }

    .article-item {
        padding: 20px;
    }

    .faq-question {
        padding: 16px 20px;
        font-size: 1rem;
    }

    .faq-answer {
        padding: 0 20px 16px;
        padding-top: 14px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .hero-content h1 {
        font-size: 1.55rem;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.85rem;
    }

    .carousel-slide h3 {
        font-size: 1.2rem;
    }

    .carousel-slide {
        padding: 24px 20px;
        min-height: 200px;
    }

    .banner-carousel {
        min-height: 200px;
    }

    .search-box {
        padding: 20px;
    }

    .search-box input {
        padding: 14px 16px;
        font-size: 0.95rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .logo svg {
        width: 30px;
        height: 30px;
    }

    .footer-brand p {
        font-size: 0.88rem;
    }

    .footer-bottom {
        font-size: 0.8rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .fade-up {
        opacity: 1;
        transform: none;
    }
}

::selection {
    background: rgba(42, 109, 244, 0.2);
    color: inherit;
}

body.dark-mode ::selection {
    background: rgba(122, 169, 255, 0.3);
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

body.dark-mode :focus-visible {
    outline-color: var(--color-primary-light);
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--color-gradient-start), var(--color-gradient-end));
    border-radius: 10px;
    border: 2px solid var(--color-bg);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--color-primary-dark), var(--color-accent));
}

body.dark-mode ::-webkit-scrollbar-track {
    background: var(--color-bg);
}

body.dark-mode ::-webkit-scrollbar-thumb {
    border-color: var(--color-bg);
}