/* ============================================
   科技感主题样式 - Cyber Tech Theme
   ============================================ */

/* CSS 变量 - 科技感配色 */
:root {
    --primary: #f97316;
    --primary-dark: #d95d0b;
    --primary-glow: rgba(249, 115, 22, 0.18);
    --secondary: #fb923c;
    --secondary-glow: rgba(251, 146, 60, 0.18);
    --accent: #10b981;
    --accent-glow: rgba(16, 185, 129, 0.5);
    
    --bg-dark: #f5f7fa;
    --bg-darker: #ffffff;
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.92);
    
    --text-primary: #162033;
    --text-secondary: #586579;
    --text-muted: #7c8798;
    
    --border-color: #e7ebf0;
    --border-glow: rgba(249, 115, 22, 0.34);
    
    --gradient-primary: linear-gradient(135deg, #ff8c00 0%, #ff6b35 100%);
    --gradient-dark: linear-gradient(180deg, #ffffff 0%, #f5f7fa 100%);
    --gradient-card: linear-gradient(180deg, #ffffff 0%, #fbfcfd 100%);
    
    --shadow-glow: 0 10px 28px rgba(249, 115, 22, 0.12);
    --shadow-card: 0 10px 30px rgba(22, 32, 51, 0.08);
    
    --font-display: 'Orbitron', 'Noto Sans SC', sans-serif;
    --font-body: 'Inter', 'Noto Sans SC', sans-serif;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.7;
    color: var(--text-primary);
    background: #ffffff;
    background-image: 
        radial-gradient(ellipse at 20% 0%, rgba(249, 115, 22, 0.045) 0%, transparent 42%),
        radial-gradient(ellipse at 80% 100%, rgba(38, 132, 255, 0.025) 0%, transparent 46%);
    min-height: 100vh;
}

/* 全局链接样式 */
a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

a:hover { text-decoration: none; }
a:visited { text-decoration: none; color: inherit; }
a:active { text-decoration: none; }

/* 容器 */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 区块 */
.section {
    padding: 100px 0;
    position: relative;
}

/* 标题样式 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    color: var(--text-primary);
    position: relative;
    letter-spacing: 2px;
}

.section-title::before {
    content: '';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    box-shadow: var(--shadow-glow);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

/* ============================================
   导航栏 - 科技感玻璃态
   ============================================ */
.navbar {
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 24px rgba(22, 32, 51, 0.08);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
}

.logo-mark {
    width: 56px;
    height: 56px;
    object-fit: contain;
    flex-shrink: 0;
    filter: drop-shadow(0 0 10px var(--primary-glow));
    transition: all 0.3s ease;
}

.logo-brand:hover .logo-mark {
    filter: drop-shadow(0 0 20px var(--primary-glow));
    transform: scale(1.05);
}

.logo-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.logo-name {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    white-space: nowrap;
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 0.9rem;
    color: var(--primary);
    margin-top: 4px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 10px 20px;
    border-radius: 8px;
    position: relative;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.nav-menu a:hover {
    color: var(--primary);
    background: rgba(249, 115, 22, 0.08);
    border-color: var(--border-color);
}

.nav-menu a.active {
    color: var(--primary);
    background: rgba(249, 115, 22, 0.1);
    border-color: var(--primary);
    box-shadow: none;
}

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* ============================================
   Hero 横幅 - 科技感全屏
   ============================================ */
.hero {
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
    margin-top: 0;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

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

.hero-img {
    filter: brightness(0.4) saturate(1.2);
}

.hero-video {
    display: block;
    filter: none;
    transform: translateZ(0);
    backface-visibility: hidden;
    will-change: transform;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(12, 18, 22, 0.28);
    z-index: 2;
}

/* 科技感网格背景 */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: 3;
    animation: none;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    position: relative;
    z-index: 4;
    width: min(900px, 100%);
    min-width: 0;
    max-width: 900px;
    padding: 0 24px;
    box-sizing: border-box;
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, var(--primary) 50%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    letter-spacing: 2px;
    overflow-wrap: anywhere;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    color: #d7dee8;
    line-height: 1.8;
}

/* 按钮样式 */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    margin: 0 8px;
    cursor: pointer;
    text-align: center;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: 0 8px 20px rgba(249, 115, 22, 0.22);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 24px rgba(249, 115, 22, 0.28);
}

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

.btn-secondary:hover {
    background: rgba(249, 115, 22, 0.1);
    box-shadow: none;
}

/* ============================================
   关于我们 - 科技感卡片
   ============================================ */
.about {
    background: var(--bg-darker);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

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

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 24px;
    color: var(--text-primary);
    font-weight: 600;
    position: relative;
    padding-left: 20px;
}

.about-text h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

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

/* 统计数据 */
.stats {
    display: flex;
    gap: 24px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    background: var(--bg-card);
    padding: 28px 24px;
    border-radius: 12px;
    flex: 1;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
}

.stat-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

.stat-item h4 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 8px;
    font-weight: 700;
    text-shadow: 0 0 20px var(--primary-glow);
}

.stat-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

/* 关于我们 - 右侧视觉区域 */
.about-visual {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 48px 40px;
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: all 0.4s ease;
}

.about-visual:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.about-icon-main {
    width: 120px;
    height: 120px;
    margin: 0 auto 24px;
    background: var(--gradient-primary);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 40px rgba(255, 140, 0, 0.3);
}

.about-icon-main i {
    font-size: 3.5rem;
    color: white;
}

.about-visual h4 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 28px;
    font-weight: 600;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    text-align: left;
}

.about-feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: rgba(255, 140, 0, 0.08);
    border-radius: 10px;
    border: 1px solid rgba(255, 140, 0, 0.15);
    transition: all 0.3s ease;
}

.about-feature-item:hover {
    background: rgba(255, 140, 0, 0.15);
    border-color: var(--primary);
    transform: translateX(5px);
}

.about-feature-item i {
    color: var(--primary);
    font-size: 1.1rem;
}

.about-feature-item span {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ============================================
   解决方案 - 科技感网格
   ============================================ */
.solutions {
    background: var(--bg-dark);
    position: relative;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.solution-card {
    background: var(--gradient-card);
    padding: 32px;
    border-radius: 16px;
    text-align: left;
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
    display: block;
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

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

.solution-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
    display: block;
    filter: drop-shadow(0 0 10px var(--primary-glow));
}

.solution-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

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

/* ============================================
   产品中心 - 科技感卡片
   ============================================ */
.products {
    background: var(--bg-darker);
    position: relative;
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--secondary), transparent);
}

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

.product-card {
    background: var(--gradient-card);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
    position: relative;
    display: flex;
    flex-direction: column;
}

.product-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.product-card:hover::after {
    transform: scaleX(1);
}

.product-image {
    background: linear-gradient(135deg, #fff7ed 0%, #f5f7fa 100%);
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    position: relative;
    flex: 0 0 200px;
}

.product-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(45deg, transparent 48%, rgba(249, 115, 22, 0.06) 50%, transparent 52%),
        linear-gradient(-45deg, transparent 48%, rgba(249, 115, 22, 0.06) 50%, transparent 52%);
    background-size: 30px 30px;
}

.product-image i {
    font-size: 5rem;
    filter: drop-shadow(0 0 20px var(--primary-glow));
}

.product-card h3 {
    padding: 24px 24px 12px;
    font-size: 1.4rem;
    color: var(--text-primary);
}

.product-card p {
    padding: 0 24px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.product-features {
    padding: 0 24px;
    list-style: none;
    margin-bottom: 24px;
    flex: 1;
}

.product-features li {
    margin-bottom: 10px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.product-features i {
    color: var(--accent);
    font-size: 0.9rem;
}

.btn-product {
    display: block;
    margin: 0 24px 24px;
    padding: 12px 24px;
    background: transparent;
    color: var(--primary);
    text-decoration: none;
    text-align: center;
    border-radius: 8px;
    border: 2px solid var(--primary);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-product:hover {
    background: var(--primary);
    color: #ffffff;
    box-shadow: none;
}

.product-manual-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 28px;
    margin: 0 24px 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

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

.product-manual-link .fa-arrow-right {
    font-size: 0.8rem;
}

/* ============================================
   联系我们 - 科技感表单
   ============================================ */
.contact {
    background: var(--bg-dark);
    position: relative;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info,
.contact-form {
    padding: 20px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-card);
}

.contact-info h3 {
    font-size: 1.6rem;
    margin-bottom: 28px;
    color: var(--text-primary);
    font-weight: 600;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.contact-item:hover {
    border-color: var(--primary);
    box-shadow: none;
}

.contact-item i {
    color: var(--primary);
    font-size: 1.3rem;
    margin-right: 16px;
    margin-top: 4px;
    flex-shrink: 0;
}

.contact-item p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* 表单样式 */
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px;
    margin-bottom: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-muted);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.contact-form button {
    width: 100%;
    padding: 16px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.contact-form button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 22px rgba(249, 115, 22, 0.2);
}

/* ============================================
   页脚 - 科技感深色
   ============================================ */
.footer {
    background: var(--bg-darker);
    color: var(--text-primary);
    padding: 60px 0 30px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
}

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

.footer-logo h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 600;
}

.footer-logo-image {
    width: 64px;
    height: 64px;
    object-fit: contain;
    margin-bottom: 16px;
    display: block;
    filter: drop-shadow(0 0 10px var(--primary-glow));
}

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

.footer-links h4,
.footer-social h4 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 1px;
}

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

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

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

.qr-card {
    display: inline-flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    max-width: 200px;
}

.qr-image {
    width: 160px;
    height: 160px;
    object-fit: cover;
    background: #fff;
    border-radius: 8px;
}

.qr-card p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-bottom p {
    margin-bottom: 8px;
}

.footer-bottom a {
    color: var(--text-secondary);
    text-decoration: none;
}

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

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 992px) {
    .hero h2 {
        font-size: 2.8rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-visual {
        padding: 36px 28px;
    }
    
    .about-icon-main {
        width: 100px;
        height: 100px;
    }
    
    .about-icon-main i {
        font-size: 3rem;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-darker);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 40px;
        transition: left 0.3s ease;
        gap: 8px;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero h2 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .stats {
        flex-direction: column;
        gap: 16px;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .section {
        padding: 60px 0;
    }
    
    .hero h2 {
        font-size: 1.8rem;
        letter-spacing: 0;
    }

    .hero-content {
        width: 100%;
        padding: 0 20px;
    }

    .hero-video {
        object-position: 52% center;
    }
    
    .btn-primary,
    .btn-secondary {
        display: block;
        margin: 10px auto;
        max-width: 280px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   动画效果
   ============================================ */
@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px var(--primary-glow);
    }
    50% {
        box-shadow: 0 0 40px var(--primary-glow);
    }
}

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

/* 加载动画 */
.btn-loading {
    position: relative;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid transparent;
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Toast 通知 */
.toast {
    position: fixed;
    top: 100px;
    right: 24px;
    padding: 16px 28px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 9999;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.success {
    background: var(--bg-card);
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.toast.error {
    background: var(--bg-card);
    border-color: #ef4444;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.5);
}

/* 表单验证样式 */
.form-group {
    position: relative;
    margin-bottom: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    transition: all 0.3s ease;
}

.form-group input.error,
.form-group textarea.error {
    border-color: #ef4444;
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.2);
}

.form-group input.valid,
.form-group textarea.valid {
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

.error-message {
    display: block;
    color: #ef4444;
    font-size: 0.85rem;
    margin-top: 6px;
    min-height: 20px;
}

.form-status {
    margin-top: 16px;
    padding: 14px;
    border-radius: 8px;
    text-align: center;
    display: none;
}

.form-status.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent);
    border: 1px solid var(--accent);
}

.form-status.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid #ef4444;
}

/* 核心能力区域 */
.capabilities {
    background: var(--bg-darker);
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.capability-card {
    background: var(--gradient-card);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.capability-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

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

.capability-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
    display: block;
    filter: drop-shadow(0 0 10px var(--primary-glow));
}

.capability-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

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

@media (max-width: 768px) {
    .capabilities-grid {
        grid-template-columns: 1fr;
    }
}