/* ============================================
   有度网络安全 - 设计系统
   ============================================ */

/* ===== CSS变量定义 ===== */
:root {
    /* 主色调 */
    --primary-dark: #0a0e1a;
    --primary-midnight: #0d1629;
    --primary-navy: #131d38;
    --primary-slate: #1e2a4a;

    /* 强调色 */
    --accent-cyan: #00d4ff;
    --accent-cyan-glow: rgba(0, 212, 255, 0.6);
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #3b82f6 50%, #8b5cf6 100%);
    --gradient-dark: linear-gradient(180deg, #0a0e1a 0%, #131d38 100%);
    --gradient-card: linear-gradient(145deg, rgba(30, 42, 74, 0.8) 0%, rgba(13, 22, 41, 0.9) 100%);

    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* 边框与分割 */
    --border-color: rgba(0, 212, 255, 0.2);
    --border-glow: rgba(0, 212, 255, 0.4);

    /* 间距 */
    --section-padding: 100px 0;
    --container-max: 1400px;

    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

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

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

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--primary-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ===== 背景网格效果 ===== */
body::before {
    content: '';
    position: fixed;
    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;
    pointer-events: none;
    z-index: -1;
}

/* ===== 容器 ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 40px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

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

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

.logo-img {
    height: 30px;
    width: auto;
    object-fit: contain;
}

/* 旧的logo-icon样式已废弃，保留占位或删除 */
.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 20px;
    color: var(--primary-dark);
    position: relative;
    overflow: hidden;
}

.logo-icon::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 40%, rgba(255, 255, 255, 0.3) 50%, transparent 60%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%) rotate(45deg);
    }

    100% {
        transform: translateX(100%) rotate(45deg);
    }
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 2px;
}

.logo-text span {
    color: var(--accent-cyan);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
    padding: 8px 0;
}

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

.nav-links a:hover {
    color: var(--accent-cyan);
}

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

.nav-cta {
    background: var(--gradient-primary);
    color: var(--primary-dark) !important;
    padding: 12px 28px !important;
    border-radius: var(--radius-xl);
    font-weight: 600 !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--accent-cyan-glow);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 28px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 100px;
}

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

.hero-canvas::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 30%;
    background: linear-gradient(to top, var(--primary-dark) 0%, transparent 100%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 650px;
    /* 限制宽度在左侧区域 */
    margin-right: auto;
    /* 确保靠左 */
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    border-radius: var(--radius-xl);
    font-size: 14px;
    color: var(--accent-cyan);
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.hero h1 {
    font-size: 72px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.hero h1 .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-slogan {
    font-size: 32px;
    font-weight: 600;
    color: var(--accent-cyan);
    margin-bottom: 24px;
    letter-spacing: 4px;
}

.hero p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    border-radius: var(--radius-xl);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--primary-dark);
    box-shadow: 0 4px 20px var(--accent-cyan-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px var(--accent-cyan-glow);
}

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

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent-cyan);
}

/* Hero统计数据 */
.hero-stats {
    display: flex;
    gap: 60px;
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

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

.stat-number {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ===== 通用区块标题 ===== */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    padding: 8px 20px;
    border-radius: var(--radius-xl);
    font-size: 13px;
    color: var(--accent-cyan);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

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

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* ===== 关于我们 ===== */
.about {
    padding: var(--section-padding);
    position: relative;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 30px;
    line-height: 1.2;
}

.about-content p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 40px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.about-feature-icon {
    width: 44px;
    height: 44px;
    background: rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    font-size: 20px;
}

.about-feature-text {
    font-size: 14px;
    font-weight: 600;
}

.about-visual {
    position: relative;
}

.about-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

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

.vision-quote {
    font-size: 20px;
    color: var(--accent-cyan);
    line-height: 1.6;
    margin-bottom: 30px;
    position: relative;
}

.vision-quote::before {
    content: "「";
}

.vision-quote::after {
    content: "」";
}


.certifications {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.cert-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--accent-green);
}

/* ===== 核心业务 ===== */
.services {
    padding: var(--section-padding);
    background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.02) 50%, transparent 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--gradient-primary);
    transition: height var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-glow);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 212, 255, 0.1);
}

.service-card:hover::before {
    height: 100%;
}

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(59, 130, 246, 0.2));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 32px;
    position: relative;
}

.service-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.service-card:hover .service-icon::after {
    opacity: 1;
}

.service-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.service-card h3 .number {
    font-size: 14px;
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.1);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

.service-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.service-tag {
    font-size: 12px;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
    padding: 6px 14px;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===== 产品亮点 - 有度慧眼 ===== */
.product {
    padding: var(--section-padding);
    position: relative;
}

.product-showcase {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-visual {
    position: relative;
}

.product-screen {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    position: relative;
    overflow: hidden;
}

.product-screen::before {
    content: '有度慧眼 - 智能反诈平台';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 15px 30px;
    background: rgba(0, 0, 0, 0.3);
    font-size: 14px;
    color: var(--accent-cyan);
    border-bottom: 1px solid var(--border-color);
}

.product-dashboard {
    margin-top: 50px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.dashboard-card {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
}

.dashboard-card .value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 5px;
}

.dashboard-card .label {
    font-size: 12px;
    color: var(--text-muted);
}

.product-info h3 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
}

.product-info h3 span {
    color: var(--accent-cyan);
}

.product-info>p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

.product-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.product-feature {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.product-feature:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--border-glow);
}

.product-feature-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.product-feature h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

.product-feature p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== 发展历程 ===== */
.timeline {
    padding: var(--section-padding);
    background: linear-gradient(180deg, transparent 0%, rgba(139, 92, 246, 0.02) 50%, transparent 100%);
}

.timeline-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-cyan), var(--accent-purple));
    transform: translateX(-50%);
}

.timeline-items {
    position: relative;
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: calc(50% + 40px);
    position: relative;
    margin-bottom: 50px;
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: calc(50% + 40px);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary-dark);
    border: 3px solid var(--accent-cyan);
    border-radius: 50%;
    z-index: 2;
}

.timeline-dot::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
}

.timeline-content {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 25px 30px;
    max-width: 400px;
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 20px;
    width: 0;
    height: 0;
    border-style: solid;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -10px;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent var(--border-color);
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -10px;
    border-width: 10px 10px 10px 0;
    border-color: transparent var(--border-color) transparent transparent;
}

.timeline-year {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.1);
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    display: inline-block;
    margin-bottom: 12px;
}

.timeline-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

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

/* ===== 客户与合作 ===== */
.clients {
    padding: var(--section-padding);
}

.clients-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 80px;
}

.client-stat {
    text-align: center;
    padding: 40px 30px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.client-stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.client-stat .number {
    font-size: 56px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 10px;
}

.client-stat .label {
    font-size: 16px;
    color: var(--text-secondary);
}

.trust-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 28px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.trust-badge:hover {
    border-color: var(--border-glow);
    transform: translateY(-3px);
}

.trust-badge-icon {
    width: 40px;
    height: 40px;
    background: rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    font-size: 18px;
}

.trust-badge span {
    font-size: 14px;
    font-weight: 500;
}

/* ===== 资质荣誉 ===== */
.certificates {
    padding: var(--section-padding);
    /* background: linear-gradient(180deg, rgba(139, 92, 246, 0.02) 0%, transparent 50%, rgba(0, 212, 255, 0.02) 100%); */
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.cert-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.cert-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glow);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 212, 255, 0.1);
}

.cert-image {
    position: relative;
    height: 220px;
    overflow: hidden;
    /* 基础科技背景 - 叠加深色遮罩让背景更暗 */
    background: linear-gradient(rgba(10, 14, 26, 0.7), rgba(10, 14, 26, 0.7)), url('../images/certs/cert-bg.png') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 0;
    /* 建立层叠上下文 */
}

/* 动态生成的模糊背景层 */
.cert-backdrop {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    background-position: center;
    background-size: cover;
    filter: blur(25px) brightness(0.7);
    /* 强模糊 + 稍微压暗 */
    opacity: 0.6;
    /* 这种半透明度可以让底部的科技纹理隐约透出来 */
    z-index: -1;
    transition: all var(--transition-normal);
}

.cert-card:hover .cert-backdrop {
    filter: blur(30px) brightness(0.9);
    /* 悬浮时变亮 */
    opacity: 0.8;
}

.cert-image img {
    position: relative;
    z-index: 1;
    /* 改用 max-width/height 配合 auto，让图片保持原始比例的同时最大化显示 */
    max-width: 85%;
    max-height: 85%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: all var(--transition-normal);
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.5);
    background: #fff;
    border: 1px solid rgba(255, 255, 255, 0.4);
    /* 给证书加一个明显的白边框，像照片一样 */
}

.cert-card:hover .cert-image img {
    transform: scale(1.05) translateY(-5px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    border-color: #fff;
}

.cert-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 212, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.cert-card:hover .cert-overlay {
    opacity: 1;
}

.cert-overlay svg {
    color: var(--accent-cyan);
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.5));
}

.cert-info {
    padding: 24px;
    text-align: center;
}

.cert-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

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

/* 专利统计条 */
.patents-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 40px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.patents-summary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.patent-stat {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: rgba(0, 212, 255, 0.05);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.patent-stat:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-3px);
}

.patent-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(139, 92, 246, 0.2));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    flex-shrink: 0;
}

.patent-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.patent-number {
    font-size: 24px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.patent-label {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ===== 联系我们 ===== */

.contact {
    padding: var(--section-padding);
    background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.03) 100%);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
}

.contact-info>p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    font-size: 20px;
    flex-shrink: 0;
}

.contact-item-content h4 {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.contact-form-wrapper {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-form {
    display: grid;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-size: 15px;
    color: var(--text-primary);
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
}

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

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

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

/* 公众号二维码卡片 */
.contact-qrcode {
    display: flex;
    justify-content: center;
    align-items: center;
}

.qrcode-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 50px 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
    max-width: 400px;
}

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

.qrcode-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 30px;
}

.qrcode-header h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.qrcode-image {
    width: 200px;
    height: 200px;
    margin: 0 auto 24px;
    background: #fff;
    border-radius: var(--radius-md);
    padding: 15px;
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.15);
    border: 2px solid var(--border-glow);
}

.qrcode-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qrcode-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}


/* ===== 页脚 ===== */
.footer {
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-top: 20px;
    margin-bottom: 24px;
    line-height: 1.8;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 18px;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.social-link:hover {
    background: var(--accent-cyan);
    color: var(--primary-dark);
    border-color: var(--accent-cyan);
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.footer-column ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

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

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    font-size: 14px;
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

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

.footer-legal a:hover {
    color: var(--accent-cyan);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .hero h1 {
        font-size: 56px;
    }

    .services-grid {
        gap: 20px;
    }

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

@media (max-width: 992px) {
    .container {
        padding: 0 24px;
    }

    .nav-links {
        display: none;
    }

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

    .hero h1 {
        font-size: 44px;
    }

    .hero-slogan {
        font-size: 24px;
    }

    .hero-stats {
        gap: 40px;
    }

    .stat-number {
        font-size: 36px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

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

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

    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 50px;
        padding-right: 0;
        justify-content: flex-start;
    }

    .timeline-line {
        left: 10px;
    }

    .timeline-dot {
        left: 10px;
    }

    .timeline-item:nth-child(odd) .timeline-content::before,
    .timeline-item:nth-child(even) .timeline-content::before {
        left: -10px;
        border-width: 10px 10px 10px 0;
        border-color: transparent var(--border-color) transparent transparent;
    }

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

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

@media (max-width: 768px) {
    .section-title {
        font-size: 36px;
    }

    .hero {
        padding-top: 80px;
    }

    .hero h1 {
        font-size: 36px;
        letter-spacing: -1px;
    }

    .hero-slogan {
        font-size: 20px;
        letter-spacing: 2px;
    }

    .hero p {
        font-size: 16px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .hero-buttons {
        flex-direction: column;
    }

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

    .about-features {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }

    .section-title {
        font-size: 28px;
    }

    .clients-stats {
        grid-template-columns: 1fr;
    }

    .client-stat .number {
        font-size: 42px;
    }

    .trust-badges {
        flex-direction: column;
    }
}

/* ===== 动画效果 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {

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

    50% {
        transform: translateY(-10px);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 浮动粒子效果 */
.particle {
    position: fixed;
    width: 4px;
    height: 4px;
    background: var(--accent-cyan);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0.5;
    animation: float 4s ease-in-out infinite;
}