@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
    --color-primary: #1A73E8;
    --color-primary-dark: #1557B0;
    --color-primary-light: #4A9EFF;
    --color-secondary: #00D4AA;
    --color-accent: #7C3AED;
    --color-dark: #0F1419;
    --color-dark-secondary: #1A2332;
    --color-dark-tertiary: #243447;
    --color-text: #E7E9EA;
    --color-text-secondary: #8B98A5;
    --color-text-muted: #6E7681;
    --color-border: #2F3B4A;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-success: #10B981;
    --color-info: #3B82F6;
    --gradient-primary: linear-gradient(135deg, #1A73E8 0%, #7C3AED 100%);
    --gradient-dark: linear-gradient(180deg, #0F1419 0%, #1A2332 100%);
    --gradient-card: linear-gradient(145deg, rgba(26, 35, 50, 0.8) 0%, rgba(15, 20, 25, 0.9) 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(26, 115, 232, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --font-base: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --container-max: 1200px;
    --header-height: 72px;
}

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

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

body {
    font-family: var(--font-base);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

a:hover {
    color: var(--color-secondary);
}

ul,
ol {
    list-style: none;
}

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

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(15, 20, 25, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: background var(--transition-normal);
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text);
    font-weight: 700;
    font-size: 1.25rem;
}

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

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav {
    display: block;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 0;
}

.nav-list li a {
    display: block;
    padding: 8px 16px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-list li a:hover {
    color: var(--color-text);
    background: var(--color-dark-tertiary);
}

.nav-cta {
    background: var(--gradient-primary) !important;
    color: white !important;
    padding: 8px 20px !important;
}

.nav-cta:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* 汉堡菜单按钮 - 桌面端隐藏 */
.mobile-menu-btn {
    display: none !important;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    position: relative;
    z-index: 1002;
    -webkit-tap-highlight-color: transparent;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: #E7E9EA;
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: var(--header-height);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(15, 20, 25, 0.7) 0%, rgba(15, 20, 25, 0.85) 50%, rgba(15, 20, 25, 0.95) 100%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    padding: 40px 24px;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #FFFFFF 0%, #A5B4C4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    min-height: 48px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(26, 115, 232, 0.5);
    color: white;
}

.btn-secondary {
    background: var(--color-dark-tertiary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-dark-secondary);
    border-color: var(--color-primary);
    color: var(--color-text);
}

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

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

.btn-text {
    background: transparent;
    color: var(--color-primary-light);
    padding: 8px 0;
}

.btn-text:hover {
    color: var(--color-secondary);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 1.1rem;
}

.hero-scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--color-text-muted);
    border-bottom: 2px solid var(--color-text-muted);
    transform: rotate(45deg);
}

section {
    padding: 100px 0;
}

.section-desc {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 48px;
    text-align: center;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--color-text);
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
}

.intro {
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
}

.intro::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(26, 115, 232, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

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

.intro-content h2 {
    text-align: left;
    margin-bottom: 24px;
}

.intro-content p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.intro-content .btn {
    margin-top: 16px;
}

.intro-visual {
    position: relative;
}

.intro-visual img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-slow);
}

.intro-visual:hover img {
    transform: scale(1.02);
}

.products {
    background: var(--color-dark-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.product-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

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

.product-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.product-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-card h3 {
    margin-bottom: 12px;
}

.product-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

.scenes {
    background: var(--color-dark);
    position: relative;
}

.scenes-grid {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.scene-card {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 60px;
    align-items: center;
}

.scene-card.reverse {
    grid-template-columns: 1fr 300px;
}

.scene-card.reverse .scene-img {
    order: 2;
}

.scene-card.reverse .scene-content {
    order: 1;
}

.scene-img {
    position: relative;
}

.scene-img img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-height: 500px;
    width: 100%;
    object-fit: cover;
}

.scene-content h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.scene-content p {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    font-size: 1.05rem;
    line-height: 1.8;
}

.guide {
    background: linear-gradient(180deg, var(--color-dark-secondary) 0%, var(--color-dark) 100%);
}

.guide-header {
    text-align: center;
    margin-bottom: 48px;
}

.guide-visual {
    margin-bottom: 60px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.guide-visual img {
    width: 100%;
    height: auto;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.step {
    display: flex;
    gap: 20px;
    padding: 28px;
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.step:hover {
    border-color: var(--color-primary);
    transform: translateX(8px);
}

.step-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
}

.step-content h3 {
    margin-bottom: 8px;
}

.step-content p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.guide-cta {
    text-align: center;
    padding: 40px;
    background: var(--color-dark-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.guide-cta p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.faq {
    background: var(--color-dark-secondary);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto 48px;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
    border-top: 1px solid var(--color-border);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-primary-light);
}

.faq-question span {
    font-size: 1.05rem;
    font-weight: 500;
    padding-right: 20px;
}

.faq-toggle {
    width: 24px;
    height: 24px;
    position: relative;
    flex-shrink: 0;
}

.faq-toggle::before,
.faq-toggle::after {
    content: '';
    position: absolute;
    background: var(--color-text-secondary);
    transition: transform var(--transition-fast);
}

.faq-toggle::before {
    width: 16px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-toggle::after {
    width: 2px;
    height: 16px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-item.active .faq-toggle::after {
    transform: translate(-50%, -50%) rotate(90deg);
    opacity: 0;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding-bottom: 24px;
}

.faq-answer p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.faq-cta {
    text-align: center;
}

.faq-cta p {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.safety {
    background: var(--color-dark);
    position: relative;
}

.safety-header {
    text-align: center;
    margin-bottom: 48px;
}

.safety-content {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 60px;
    align-items: start;
}

.safety-visual {
    position: sticky;
    top: calc(var(--header-height) + 24px);
}

.safety-visual img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.safety-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.safety-item {
    padding: 24px;
    border-radius: var(--radius-md);
    border-left: 4px solid;
    background: var(--gradient-card);
}

.safety-item.warning {
    border-left-color: var(--color-danger);
    background: linear-gradient(90deg, rgba(239, 68, 68, 0.1) 0%, transparent 100%), var(--gradient-card);
}

.safety-item.caution {
    border-left-color: var(--color-warning);
    background: linear-gradient(90deg, rgba(245, 158, 11, 0.1) 0%, transparent 100%), var(--gradient-card);
}

.safety-item.info {
    border-left-color: var(--color-info);
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.1) 0%, transparent 100%), var(--gradient-card);
}

.safety-item h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.safety-item p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.safety-cta {
    text-align: center;
    margin-top: 48px;
    padding: 40px;
    background: var(--color-dark-secondary);
    border-radius: var(--radius-lg);
}

.safety-cta p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.news {
    background: var(--color-dark-secondary);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition-normal);
}

.news-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
}

.news-date {
    font-size: 0.85rem;
    color: var(--color-primary-light);
    margin-bottom: 12px;
}

.news-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.news-link {
    font-size: 0.9rem;
    font-weight: 500;
}

.about {
    background: var(--color-dark);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.about-content {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 60px;
    align-items: center;
}

.about-visual img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.about-text h2 {
    text-align: left;
    margin-bottom: 24px;
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    font-size: 1.05rem;
    line-height: 1.8;
}

.contact {
    background: linear-gradient(180deg, var(--color-dark-secondary) 0%, var(--color-dark-tertiary) 100%);
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact h2 {
    margin-bottom: 16px;
}

.contact-content > p {
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    font-size: 1.1rem;
}

.contact-actions {
    margin-bottom: 24px;
}

.contact-note {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.site-footer {
    background: var(--color-dark);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 30px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--color-border);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
}

.footer-logo span {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.footer-brand p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

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

.footer-nav-group h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 16px;
}

.footer-nav-group ul li {
    margin-bottom: 10px;
}

.footer-nav-group ul li a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.footer-bottom a {
    color: var(--color-primary-light);
}

.footer-icp a {
    color: var(--color-text-muted);
}

.footer-icp a:hover {
    color: var(--color-text-secondary);
}

.back-to-top {
    position: fixed;
    bottom: 60px;
    right: 24px;
    width: 48px;
    height: 48px;
    background: var(--color-dark-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    cursor: pointer;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: translateY(-4px);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .safety-content {
        grid-template-columns: 1fr;
    }

    .safety-visual {
        position: static;
        max-width: 400px;
        margin: 0 auto 40px;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-visual {
        max-width: 400px;
        margin: 0 auto;
    }

    .about-text h2 {
        text-align: center;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.mobile-nav-overlay {
    display: none;
}

@media screen and (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    /* 移动端遮罩层 */
    .mobile-nav-overlay {
        display: block !important;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 998;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .mobile-nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* 移动端导航栏 */
    .main-nav {
        display: block !important;
        position: fixed;
        top: 0;
        right: 0;
        width: 280px;
        height: 100vh;
        height: 100dvh;
        background: #0F1419;
        z-index: 1001;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        padding-top: 80px;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .main-nav.active {
        transform: translateX(0) !important;
    }

    .main-nav .nav-list {
        display: flex !important;
        flex-direction: column;
        padding: 20px;
        gap: 10px;
    }

    .main-nav .nav-list li {
        display: block;
        width: 100%;
    }

    .main-nav .nav-list li a {
        display: block;
        width: 100%;
        padding: 14px 18px;
        color: #E7E9EA;
        font-size: 16px;
        text-align: left;
        background: #1A2332;
        border: 1px solid #2F3B4A;
        border-radius: 8px;
        text-decoration: none;
    }

    .main-nav .nav-list li a:hover,
    .main-nav .nav-list li a:active {
        background: #243447;
        border-color: #1A73E8;
    }

    .main-nav .nav-list li a.nav-cta {
        background: linear-gradient(135deg, #1A73E8 0%, #7C3AED 100%);
        border: none;
        color: #fff;
        text-align: center;
        margin-top: 10px;
    }

    /* 汉堡按钮 - 移动端显示 */
    .mobile-menu-btn {
        display: flex !important;
        position: relative;
        z-index: 1002;
    }

    section {
        padding: 60px 0;
    }

    .hero {
        min-height: 100svh;
    }

    .hero-content {
        padding: 20px;
    }

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

    .hero-actions .btn {
        width: 100%;
        max-width: 300px;
    }

    .hero-scroll-hint {
        display: none;
    }

    .intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .intro-content h2 {
        text-align: center;
    }

    .intro-content {
        text-align: center;
    }

    .intro-visual {
        max-width: 400px;
        margin: 0 auto;
    }

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

    .scene-card,
    .scene-card.reverse {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .scene-card.reverse .scene-img,
    .scene-card.reverse .scene-content {
        order: unset;
    }

    .scene-img {
        max-width: 280px;
        margin: 0 auto;
    }

    .scene-content {
        text-align: center;
    }

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

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

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

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

    .footer-nav {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

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

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

    .back-to-top {
        bottom: 110px;
        right: 16px;
        width: 44px;
        height: 44px;
    }
}

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

    h2 {
        font-size: 1.5rem;
    }

    .section-desc {
        font-size: 1rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.95rem;
    }

    .product-card {
        padding: 24px 20px;
    }

    .faq-question span {
        font-size: 1rem;
    }

    .step-number {
        font-size: 2rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}