/* ==================== 全局样式 ==================== */
:root {
    --primary-color: #F97316;
    --primary-dark: #EA580C;
    --primary-light: #FB923C;
    --primary-lighter: #FDBA74;
    --secondary-color: #F59E0B;
    --accent-color: #EF4444;
    --success-color: #10B981;
    --danger-color: #DC2626;

    --bg-dark: #FAFAFA;
    --bg-darker: #F5F5F5;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.8);

    --text-primary: #1A1A2E;
    --text-secondary: #4A5568;
    --text-muted: #718096;

    --border-color: rgba(249, 115, 22, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.08);

    --gradient-primary: linear-gradient(135deg, #F97316 0%, #FB923C 50%, #F59E0B 100%);
    --gradient-accent: linear-gradient(135deg, #F97316 0%, #EF4444 100%);
    --gradient-bg: linear-gradient(180deg, #FAFAFA 0%, #F5F5F5 100%);
    --gradient-glow: radial-gradient(circle at center, rgba(249, 115, 22, 0.08) 0%, transparent 70%);

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-family);
    background: var(--gradient-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ==================== 粒子背景 ==================== */
#particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(249, 115, 22, 0.3);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 15s infinite ease-in-out;
    box-shadow: 0 0 10px rgba(249, 115, 22, 0.2);
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0) translateX(0);
    }

    25% {
        transform: translateY(-30px) translateX(20px);
    }

    50% {
        transform: translateY(-15px) translateX(-15px);
    }

    75% {
        transform: translateY(-25px) translateX(10px);
    }
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px var(--shadow-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    transition: var(--transition-base);
}

.logo-img:hover {
    transform: rotate(360deg) scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
    transition: var(--transition-base);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-base);
}

/* Language Switch */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0.35rem 0.75rem;
    backdrop-filter: blur(10px);
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    transition: var(--transition-base);
}

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

.lang-btn.active {
    color: var(--primary-color);
    background: rgba(249, 115, 22, 0.1);
    font-weight: 600;
}

.lang-divider {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* ==================== Hero Section ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 700px;
    z-index: 10;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
}

.badge-icon {
    font-size: 1rem;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.25rem;
    font-weight: 400;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 10px 30px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(249, 115, 22, 0.5);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-light);
    transform: translateY(-3px);
}

/* Language Support Section */
.language-support {
    margin-top: 2rem;
    text-align: center;
}

.support-title {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.language-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.language-item {
    display: flex;
    flex-direction: column;
        align-items: center;
        gap: 0.5rem;
        padding: 1rem;
        background: var(--bg-glass);
        border: 1px solid var(--border-color);
        border-radius: 12px;
        transition: var(--transition-base);
}

.language-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-light);
    box-shadow: 0 8px 20px rgba(249, 115, 22, 0.2);
}

.language-item i {
    font-size: 2.5rem;
    line-height: 1;
}

.language-item span {
    font-size: 0.875rem;
    color: var(--text-secondary);
        font-weight: 500;
}

/* Floating Cards */
.hero-visual {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

.floating-card {
    position: absolute;
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    animation: card-float 6s ease-in-out infinite;
}

.floating-card i {
    font-size: 1.25rem;
    color: var(--primary-light);
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 30%;
    right: 10%;
    animation-delay: 1.5s;
}

.card-3 {
    bottom: 30%;
    left: 8%;
    animation-delay: 3s;
}

.card-4 {
    bottom: 20%;
    right: 12%;
    animation-delay: 4.5s;
}

@keyframes card-float {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-20px) rotate(2deg);
    }
}

/* ==================== Features Section ==================== */
.features {
    padding: 6rem 0;
    position: relative;
    z-index: 10;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-light);
    box-shadow: 0 20px 40px rgba(249, 115, 22, 0.3);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==================== Demo Section ==================== */
.demo-section {
    padding: 6rem 0;
    position: relative;
    z-index: 10;
    background: rgba(250, 250, 250, 0.5);
}

.video-container {
    max-width: 900px;
    margin: 0 auto;
}

.video-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

.video-wrapper video {
    width: 100%;
    display: block;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.video-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.play-button {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    box-shadow: 0 10px 40px rgba(249, 115, 22, 0.6);
}

.play-button:hover {
    transform: scale(1.1);
    box-shadow: 0 15px 50px rgba(249, 115, 22, 0.8);
}

/* ==================== Download Section ==================== */
.download-section {
    padding: 6rem 0;
    position: relative;
    z-index: 10;
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-base);
}

.download-card:hover .card-glow {
    opacity: 1;
}

.download-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-light);
}

.download-card.featured {
    border-color: var(--primary-light);
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.15) 0%, rgba(251, 146, 60, 0.05) 100%);
}


.download-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--bg-glass);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--primary-light);
    transition: var(--transition-base);
}

.download-card:hover .download-icon {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    transform: scale(1.1);
}

.download-card h3 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    white-space: nowrap;
}

.version-info {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.features-list {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.features-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.features-list i {
    color: var(--success-color);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    justify-content: center;
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: var(--transition-base);
    box-shadow: 0 8px 24px rgba(249, 115, 22, 0.4);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(249, 115, 22, 0.6);
}

.file-size {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Architecture Selector */
.arch-selector {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    justify-content: center;
    position: relative;
    z-index: 10;
}

.arch-btn {
    flex: 1;
    padding: 0.5rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    z-index: 10;
}

.arch-btn:hover {
    border-color: var(--primary-light);
    color: var(--text-primary);
}

.arch-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    font-weight: 500;
}

.arch-selector.web-selector {
    display: block;
}

.arch-select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-base);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23718096' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
    position: relative;
    z-index: 10;
}

.arch-select:hover {
    border-color: var(--primary-light);
}

.arch-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}
.system-requirements {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
}

.system-requirements h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.requirement-item {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ==================== Contact Section ==================== */
.contact-section {
    padding: 6rem 0;
    position: relative;
    z-index: 10;
    background: rgba(250, 250, 250, 0.5);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    transition: var(--transition-base);
}

.contact-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-light);
    box-shadow: 0 20px 40px rgba(249, 115, 22, 0.3);
}

.contact-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: white;
}

.contact-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-card>p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.qr-code {
    margin-bottom: 1.5rem;
}

.qr-code img {
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.contact-info {
    margin-bottom: 1.5rem;
}

.contact-info p {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.contact-info i {
    color: var(--primary-light);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.social-links a {
    width: 50px;
    height: 50px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: var(--transition-base);
}

.social-links a:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    transform: translateY(-3px);
}

.contact-link {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: var(--transition-base);
}

.contact-link:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    transform: translateY(-3px);
}

/* ==================== Footer ==================== */
.footer {
    background: #F5F5F5;
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    position: relative;
    z-index: 10;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
    font-size: 0.875rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 0;
    font-size: 0.875rem;
    transition: var(--transition-base);
}

.footer-column a:hover {
    color: var(--primary-light);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin: 0.5rem 0;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

    .floating-card {
        display: none;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        transform: translateY(-150%);
        transition: var(--transition-base);
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .hamburger {
        display: flex;
    }

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

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

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

    .hero-title {
        font-size: 2.5rem;
    }

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

    .features-grid,
    .download-cards,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

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

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

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

    .section-title {
        font-size: 2rem;
    }
}