:root {
    /* 主色调 - 激光蓝/青色 */
    --primary: #00d4ff;
    --primary-dark: #00a8cc;
    --primary-light: #4de1ff;
    --primary-glow: rgba(0, 212, 255, 0.3);
    
    /* 深色主题 */
    --bg-dark: #0a0a0f;
    --bg-dark-light: #12121a;
    --bg-dark-lighter: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.8);
    
    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* 强调色 */
    --accent-orange: #ff6b35;
    --accent-purple: #8b5cf6;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #12121a 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
    
    /* 字体 */
    --font-display: 'Rajdhani', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', 'Rajdhani', sans-serif;
    
    /* 间距 */
    --section-padding: 120px;
    --container-max: 1400px;
    
    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 阴影 */
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

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

/* 导航栏 - 与阿根廷站统一风格 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    z-index: 1000;
    transition: var(--transition-normal);
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(100, 180, 255, 0.12);
}

.navbar.scrolled {
    background: rgba(10, 22, 40, 0.98);
    border-bottom: 1px solid rgba(100, 180, 255, 0.18);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 40px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none !important;
}

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

.logo .brand-text,
.brand-text {
    color: #ffb432 !important;
    font-size: 16px !important;
    font-weight: 600 !important;
    letter-spacing: 1px !important;
    white-space: nowrap !important;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif !important;
    text-decoration: none !important;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 25px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-link {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
    padding: 8px 0;
    letter-spacing: 0.5px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #ffb432;
    transition: var(--transition-normal);
}

.nav-link:hover {
    color: #ffb432;
}

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

.nav-link.active {
    color: #ffb432;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    padding: 6px 12px;
    border-radius: 20px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 13px;
    transition: var(--transition-fast);
}

.lang-switcher:hover {
    background: rgba(0, 212, 255, 0.15);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
}

.lang-option {
    color: var(--text-muted);
    text-decoration: none;
    padding: 4px 8px;
    border-radius: 12px;
    transition: var(--transition-fast);
    cursor: pointer;
}

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

.lang-option.active {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.2);
}

.lang-divider {
    color: var(--text-muted);
    opacity: 0.4;
    font-weight: 400;
}

/* 导航栏CTA按钮 - 与阿根廷站统一 */
.nav-contact-btn {
    background: linear-gradient(135deg, #ffb432 0%, #ff8c00 100%);
    color: #ffffff;
    text-decoration: none;
    padding: 10px 22px;
    border-radius: 25px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.nav-contact-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(255, 180, 50, 0.4);
}

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

.mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: #f5a623;
    border-radius: 2px;
    transition: all 0.3s;
}

.mobile-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.mobile-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 40px 80px;
    background: linear-gradient(160deg, #0a0f1a 0%, #0f2040 50%, #0a0f1a 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
    z-index: 0;
}

#heroCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 14px;
    color: var(--primary);
    margin-bottom: 30px;
    animation: fadeInUp 0.8s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(36px, 6vw, 72px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 30px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.title-line {
    display: block;
}

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

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.3s both;
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    font-family: var(--font-body);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--bg-dark);
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 212, 255, 0.05);
}

.btn-arrow {
    width: 18px;
    height: 18px;
    transition: var(--transition-fast);
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

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

/* Hero Stats */
.hero-stats {
    position: relative;
    margin-top: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    z-index: 10;
}

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

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 12px;
    animation: bounce 2s ease-in-out infinite;
    z-index: 10;
}

.scroll-mouse {
    width: 24px;
    height: 36px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
    0%, 100% { opacity: 1; top: 6px; }
    50% { opacity: 0.3; top: 14px; }
}

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

/* 通用区块样式 */
section {
    padding: var(--section-padding) 40px;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 80px;
}

.section-header.light {
    color: var(--text-primary);
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 20px;
    position: relative;
}

.section-tag::before,
.section-tag::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 30px;
    height: 1px;
    background: var(--primary);
    opacity: 0.5;
}

.section-tag::before {
    right: calc(100% + 15px);
}

.section-tag::after {
    left: calc(100% + 15px);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.section-title.light {
    color: var(--text-primary);
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 技术区块 */
.technology {
    background: var(--bg-dark-light);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: var(--container-max);
    margin: 0 auto;
}

.tech-card {
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 16px;
    padding: 30px;
    display: flex;
    gap: 25px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    align-items: flex-start;
}

.tech-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition-normal);
}

.tech-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

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

.tech-visual {
    position: relative;
    flex-shrink: 0;
}

.tech-image {
    width: 160px;
    height: 120px;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    z-index: 1;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.tech-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.tech-card:hover .tech-image img {
    transform: scale(1.05);
}

.tech-icon {
    width: 80px;
    height: 80px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    position: relative;
    z-index: 1;
}

.tech-icon svg {
    width: 40px;
    height: 40px;
}

.tech-glow {
    position: absolute;
    inset: -10px;
    background: var(--primary);
    filter: blur(30px);
    opacity: 0.2;
    border-radius: 20px;
}

.tech-content {
    position: relative;
    z-index: 1;
    flex: 1;
}

.tech-content {
    position: relative;
    z-index: 1;
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.tech-content h3 {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.tech-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.tech-features {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 15px;
}

.tech-features li {
    font-size: 13px;
    color: var(--text-muted);
    padding-left: 18px;
    position: relative;
}

.tech-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
}

.tech-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition-fast);
}

.tech-link svg {
    width: 16px;
    height: 16px;
    transition: var(--transition-fast);
}

.tech-link:hover svg {
    transform: translateX(4px);
}

/* 应用案例区块 */
.applications {
    background: var(--bg-dark);
}

.app-categories {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.app-tab {
    padding: 12px 28px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: var(--font-body);
}

.app-tab:hover {
    border-color: rgba(0, 212, 255, 0.3);
    color: var(--primary);
}

.app-tab.active {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary);
    color: var(--primary);
}

.app-content {
    max-width: var(--container-max);
    margin: 0 auto;
}

.app-panel {
    display: none;
}

.app-panel.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.app-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition-normal);
}

.app-card:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-5px);
    box-shadow: var(--shadow-card);
}

.app-image {
    aspect-ratio: 16/10;
    background: var(--bg-dark-lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.app-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.app-card:hover .app-image img {
    transform: scale(1.05);
}

.app-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    opacity: 0.5;
}

.app-placeholder svg {
    width: 60px;
    height: 60px;
}

.app-info {
    padding: 30px;
}

.app-info h4 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.app-info p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 关于我们区块 */
.about {
    background: var(--bg-dark-light);
    padding: 0;
}

.about-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 700px;
}

.about-visual {
    position: relative;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, transparent 50%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px;
}

.about-image-wrapper {
    position: relative;
}

.about-image {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(0, 212, 255, 0.05) 100%);
    border: 1px solid rgba(0, 212, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.about-image::before {
    content: '';
    position: absolute;
    inset: -20px;
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 50%;
}

.about-image::after {
    content: '';
    position: absolute;
    inset: -40px;
    border: 1px solid rgba(0, 212, 255, 0.05);
    border-radius: 50%;
}

.about-placeholder {
    color: var(--primary);
    opacity: 0.8;
}

.about-placeholder svg {
    width: 150px;
    height: 150px;
}

.about-logo-img {
    width: 70%;
    height: 70%;
    object-fit: contain;
    filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.3));
}

.about-stats-float {
    position: absolute;
    bottom: 20px;
    right: 0;
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 16px;
    padding: 20px 30px;
    box-shadow: var(--shadow-glow);
}

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

.float-number {
    display: block;
    font-family: var(--font-display);
    font-size: 42px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.float-label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 5px;
}

.about-content {
    padding: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.about-content .section-tag {
    text-align: left;
}

.about-content .section-tag::before,
.about-content .section-tag::after {
    display: none;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 30px;
}

.about-text {
    margin-bottom: 40px;
}

.about-text p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.about-feature {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-text h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.feature-text p {
    font-size: 13px;
    color: var(--text-muted);
}

/* 联系我们区块 */
.contact {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-light) 100%);
    padding: 100px 40px;
}

.contact-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-info .section-tag,
.contact-info .section-title {
    text-align: left;
}

.contact-info .section-tag::before,
.contact-info .section-tag::after {
    display: none;
}

.contact-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

.contact-text h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-text p {
    font-size: 16px;
    color: var(--text-primary);
}

/* 联系表单 */
.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 20px;
    padding: 50px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 16px 20px;
    font-size: 15px;
    color: var(--text-primary);
    font-family: var(--font-body);
    transition: var(--transition-fast);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(0, 212, 255, 0.05);
}

.form-group label {
    position: absolute;
    left: 20px;
    top: 16px;
    font-size: 15px;
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition-fast);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -10px;
    left: 15px;
    font-size: 12px;
    color: var(--primary);
    background: var(--bg-card);
    padding: 0 8px;
}

/* 页脚 */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 80px 40px 40px;
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 80px;
    margin-bottom: 60px;
}

.footer-logo {
    height: 50px;
    margin-bottom: 20px;
    filter: brightness(1.2);
}

.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    max-width: 300px;
}

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

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

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

.footer-column a {
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.copyright,
.icp {
    font-size: 13px;
    color: var(--text-muted);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .about-container {
        grid-template-columns: 1fr;
    }
    
    .about-visual {
        min-height: 400px;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 50px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }
    
    .nav-container {
        padding: 0 16px;
    }
    
    .nav-menu {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(10, 15, 26, 0.98);
        flex-direction: column;
        gap: 0;
        padding: 12px 0;
        border-top: 1px solid rgba(245, 166, 35, 0.15);
        z-index: 999999;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu li a {
        padding: 14px 20px;
        font-size: 1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        display: block;
        color: rgba(255, 255, 255, 0.85);
    }
    
    .nav-menu li:last-child a {
        border-bottom: none;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .nav-contact-btn {
        display: none;
    }
    
    .lang-switcher {
        font-size: 11px;
        padding: 4px 8px;
    }
    
    .hero-stats {
        position: relative;
        bottom: auto;
        margin-top: 60px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .stat-divider {
        display: none;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .tech-card {
        flex-direction: column;
        text-align: center;
        padding: 25px;
    }
    
    .tech-visual {
        margin: 0 auto 20px;
    }
    
    .tech-image {
        width: 100%;
        max-width: 280px;
        height: 180px;
        margin: 0 auto;
    }
    
    .tech-content p {
        -webkit-line-clamp: 4;
    }
    
    .tech-features {
        grid-template-columns: 1fr;
        text-align: left;
        max-width: 280px;
        margin: 0 auto 15px;
    }
    
    .app-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        padding: 60px 30px;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 30px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-container,
    section {
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .hero {
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .app-categories {
        gap: 10px;
    }
    
    .app-tab {
        padding: 10px 20px;
        font-size: 13px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* 动画类 */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.slide-up {
    animation: slideUp 0.6s ease forwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 滚动显示动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}