:root {
    --primary: #00bfff;
    --primary-dark: #00a0e0;
    --secondary: #ffcc00;
    --dark: #0a0a1a;
    --light: #f8f9fa;
    --gray: #6c757d;
    --success: #28a745;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #0a0a1a 0%, #1a1a2e 100%);
    color: #e0e0ff;
    overflow-x: hidden;
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* 3D背景效果 */
.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    perspective: 1000px;
}

.cube {
    position: absolute;
    width: 60px;
    height: 60px;
    background: rgba(0, 191, 255, 0.1);
    transform-style: preserve-3d;
    animation: float 20s infinite linear;
    opacity: 0.6;
}

.cube::before, .cube::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: inherit;
    transform: rotateY(90deg);
}

.cube::after {
    transform: rotateX(90deg);
}

@keyframes float {
    0% { transform: rotateX(0deg) rotateY(0deg) translateZ(0px); }
    100% { transform: rotateX(360deg) rotateY(360deg) translateZ(0px); }
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(10, 10, 26, 0.8);
    border-bottom: 1px solid rgba(0, 191, 255, 0.2);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: url('https://file.star-n.online/svg/ENC.svg') center/contain no-repeat;
}

.logo-icon-n {
    width: 80px;
    height: 80px;
    background: url('https://file.star-n.online/svg/ENC.svg') center/contain no-repeat;
}

.logo-icon-l {
    width: 80px;
    height: 80px;
    background: url('https://file.star-n.online/img/图层 17.png') center/contain no-repeat;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: #e0e0ff;
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: color 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

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

/* 主体容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 40px 80px;
}

/* 大框架样式 */
.frame {
    margin: 100px 0;
    position: relative;
    overflow: hidden;
}

.frame-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.frame-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(0, 191, 255, 0.3);
    position: relative;
    display: inline-block;
}

.frame-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
}

.frame-subtitle {
    color: #a0b0ff;
    font-size: 1.3rem;
    max-width: 800px;
    margin: 20px auto 0;
    font-weight: 300;
}

/* 英雄区域 */
.hero {
    text-align: center;
    padding: 120px 0;
    position: relative;
    background: linear-gradient(135deg, rgba(0, 191, 255, 0.05), rgba(10, 10, 30, 0.8));
    border-radius: 30px;
    margin: 80px 0;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 70%, rgba(0, 191, 255, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 5rem;
    font-weight: 800;
    margin-bottom: 30px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 191, 255, 0.3);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.8rem;
    color: #a0b0ff;
    margin-bottom: 40px;
    font-weight: 300;
    line-height: 1.5;
}

.hero-desc {
    font-size: 1.3rem;
    color: #c0d0ff;
    margin-bottom: 50px;
    line-height: 1.8;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: inline-flex;
    gap: 30px;
    margin-top: 40px;
}

.btn {
    padding: 18px 40px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    letter-spacing: 1px;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    color: #000;
    box-shadow: 0 15px 40px rgba(0, 191, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(0, 191, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: rgba(0, 191, 255, 0.1);
    transform: translateY(-5px);
    border-color: var(--secondary);
    color: var(--secondary);
}

/* 认证框架 */
.certification-frame {
    background: linear-gradient(135deg, rgba(0, 191, 255, 0.05), rgba(10, 10, 30, 0.8));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

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

.certification-text {
    position: relative;
    z-index: 1;
}

.certification-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 30px;
    color: #ffffff;
    line-height: 1.2;
}

.certification-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.2rem;
    margin-bottom: 40px;
}

.certification-highlight {
    background: rgba(0, 191, 255, 0.1);
    border-radius: 15px;
    padding: 30px;
    margin: 40px 0;
    border-left: 4px solid var(--primary);
}

.highlight-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary);
}

.highlight-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

.certification-list {
    list-style: none;
    margin: 40px 0;
}

.certification-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
    padding-left: 20px;
    position: relative;
}

.certification-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
}

.certification-item-title {
    font-weight: 600;
    color: #ffffff;
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.certification-item-desc {
    color: #a0b0ff;
    font-size: 1.1rem;
    line-height: 1.6;
}

.certification-image {
    position: relative;
    z-index: 1;
}

.certification-image img {
    width: 100%;
    max-width: 600px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: transform 0.5s;
}

.certification-image img:hover {
    transform: scale(1.03);
}

/* 价值框架 */
.value-frame {
    background: linear-gradient(135deg, rgba(10, 10, 30, 0.9), rgba(20, 20, 50, 0.9));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.value-item {
    padding: 40px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.value-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.value-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.3;
}

.value-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 流程框架 */
.process-frame {
    background: linear-gradient(135deg, rgba(0, 191, 255, 0.05), rgba(10, 10, 30, 0.8));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.process-step {
    padding: 40px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.process-step:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: #000;
    font-size: 1.5rem;
    margin: 0 auto 20px;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.3;
}

.step-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 详细认证标准 */
.standards-frame {
    background: linear-gradient(135deg, rgba(10, 10, 30, 0.9), rgba(20, 20, 50, 0.9));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.standards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.standard-item {
    padding: 40px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.standard-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.standard-number {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: #000;
    font-size: 1.2rem;
}

.standard-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.3;
}

.standard-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.standard-details {
    background: rgba(0, 191, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    margin-top: 20px;
    border-left: 3px solid var(--primary);
}

.detail-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary);
}

.detail-list {
    list-style: none;
    padding-left: 0;
}

.detail-list li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
    color: #c0d0ff;
    font-size: 1rem;
}

.detail-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* 测试方法 */
.testing-frame {
    background: linear-gradient(135deg, rgba(0, 191, 255, 0.05), rgba(10, 10, 30, 0.8));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.testing-content {
    margin-top: 60px;
}

.testing-section {
    margin-bottom: 40px;
    padding: 30px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
}

.testing-section:hover {
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.testing-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.3;
}

.testing-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 标准演进 */
.evolution-frame {
    background: linear-gradient(135deg, rgba(10, 10, 30, 0.9), rgba(20, 20, 50, 0.9));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.evolution-content {
    max-width: 900px;
    margin: 0 auto;
}

.evolution-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.2rem;
    margin-bottom: 60px;
    text-align: center;
}

.evolution-timeline {
    position: relative;
    padding-left: 30px;
}

.evolution-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 10px;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid #0a0a1a;
}

.timeline-date {
    position: absolute;
    left: -100px;
    top: 5px;
    width: 80px;
    height: 30px;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #000;
    font-size: 0.9rem;
}

.timeline-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #ffffff;
    line-height: 1.3;
}

.timeline-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 实验室介绍 */
.lab-frame {
    background: linear-gradient(135deg, rgba(0, 191, 255, 0.05), rgba(10, 10, 30, 0.8));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.lab-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.lab-title {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 40px;
    color: #ffffff;
    line-height: 1.2;
}

.lab-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.3rem;
    margin-bottom: 60px;
    font-weight: 300;
}

.lab-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 80px;
    background: rgba(30, 30, 60, 0.6);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
}

.lab-section:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.lab-section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: #ffffff;
    position: relative;
    display: inline-block;
}

.lab-section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.lab-section-desc {
    color: #a0b0ff;
    line-height: 1.8;
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* 技术实力 */
.expertise-frame {
    background: linear-gradient(135deg, rgba(10, 10, 30, 0.9), rgba(20, 20, 50, 0.9));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.expertise-content {
    margin-top: 60px;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.expertise-item {
    padding: 40px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.expertise-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.expertise-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.expertise-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.3;
}

.expertise-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 实验室设施 */
.facilities-frame {
    background: linear-gradient(135deg, rgba(0, 191, 255, 0.05), rgba(10, 10, 30, 0.8));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.facilities-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.facility-item {
    padding: 40px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.facility-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.facility-image {
    margin-bottom: 30px;
    height: 200px;
    border-radius: 15px;
    overflow: hidden;
}

.facility-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(0, 191, 255, 0.1), rgba(255, 204, 0, 0.1));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.5rem;
    font-weight: 600;
    border: 2px dashed rgba(0, 191, 255, 0.3);
}

.facility-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.3;
}

.facility-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 研究成果 */
.research-frame {
    background: linear-gradient(135deg, rgba(10, 10, 30, 0.9), rgba(20, 20, 50, 0.9));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.research-content {
    margin-top: 60px;
}

.research-section {
    margin-bottom: 40px;
    padding: 30px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
}

.research-section:hover {
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.research-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.3;
}

.research-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 服务框架 */
.services-frame {
    background: linear-gradient(135deg, rgba(0, 191, 255, 0.05), rgba(10, 10, 30, 0.8));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

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

.service-item {
    padding: 40px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.service-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.3;
}

.service-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 申请流程 */
.application-frame {
    background: linear-gradient(135deg, rgba(10, 10, 30, 0.9), rgba(20, 20, 50, 0.9));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

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

.application-step {
    padding: 40px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.application-step:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.step-badge {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: #000;
    font-size: 1.5rem;
    margin: 0 auto 20px;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #ffffff;
    line-height: 1.3;
}

.step-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 联系框架 */
.contact-frame {
    background: linear-gradient(135deg, rgba(0, 191, 255, 0.05), rgba(10, 10, 30, 0.8));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.contact-title {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 40px;
    color: #ffffff;
    line-height: 1.2;
}

.contact-desc {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.3rem;
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin: 60px 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.contact-item {
    text-align: center;
    padding: 30px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
}

.contact-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.contact-item-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: #000;
    font-weight: 800;
}

.contact-item-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #ffffff;
}

.contact-item-desc {
    color: #a0b0ff;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* 联系表单 */
.contact-form {
    max-width: 800px;
    margin: 60px auto 0;
    padding: 40px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
}

.contact-form:hover {
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.form-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: #ffffff;
    text-align: center;
}

.form-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-input, .form-textarea {
    padding: 15px 20px;
    border-radius: 10px;
    border: 1px solid rgba(0, 191, 255, 0.3);
    background: rgba(10, 10, 30, 0.5);
    color: #e0e0ff;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 191, 255, 0.3);
}

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

.form-submit {
    margin-top: 20px;
    width: 100%;
}

/* 常见问题 */
.faq-frame {
    background: linear-gradient(135deg, rgba(10, 10, 30, 0.9), rgba(20, 20, 50, 0.9));
    border-radius: 30px;
    padding: 80px;
    margin: 120px 0;
    position: relative;
    overflow: hidden;
}

.faq-content {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 30px;
    padding: 30px;
    background: rgba(30, 30, 60, 0.6);
    border-radius: 20px;
    border: 1px solid rgba(0, 191, 255, 0.2);
    transition: all 0.4s ease;
}

.faq-item:hover {
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 191, 255, 0.1);
}

.faq-question {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--primary);
    line-height: 1.3;
}

.faq-answer {
    color: #c0d0ff;
    line-height: 1.8;
    font-size: 1.1rem;
}

/* 页脚 */
footer {
    background: rgba(10, 10, 30, 0.95);
    padding: 80px 40px;
    text-align: center;
    border-top: 1px solid rgba(0, 191, 255, 0.1);
    margin-top: 120px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 30px;
}

.footer-desc {
    color: #a0b0ff;
    font-size: 1.2rem;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    margin: 40px 0;
}

.footer-link {
    color: #a0b0ff;
    text-decoration: none;
    transition: color 0.3s;
    font-size: 1.1rem;
    font-weight: 500;
    position: relative;
    padding: 10px 0;
}

.footer-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s;
}

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

.footer-link:hover, .footer-link.active {
    color: var(--primary);
}

.copyright {
    color: #7080a0;
    font-size: 0.9rem;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 120px 20px 80px;
    }
    
    .navbar {
        padding: 20px;
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.4rem;
    }
    
    .frame-title {
        font-size: 2.5rem;
    }
    
    .certification-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .standards-grid, .value-grid, .expertise-grid, .facilities-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid, .process-steps, .application-steps {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .certification-image img {
        max-width: 100%;
        height: auto;
    }
    
    .evolution-timeline {
        padding-left: 20px;
    }
    
    .timeline-date {
        left: -80px;
        width: 60px;
        font-size: 0.8rem;
    }
}

/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}

/* 粒子效果 */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(0, 191, 255, 0.6);
    border-radius: 50%;
    animation: particle-float 15s infinite linear;
}

@keyframes particle-float {
    0% { transform: translateY(0) translateX(0); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(-100vh) translateX(100px); opacity: 0; }
}

/* 渐变边框动画 */
.gradient-border {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 30px;
    padding: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
    background-size: 300% 300%;
    animation: gradient-animation 6s ease infinite;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: 1;
}

@keyframes gradient-animation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
/* 图片免责声明 */
.image-disclaimer {
    color: #888;
    font-size: 0.8rem;
    text-align: center;
    margin-top: 20px;
    font-style: italic;
}/* 移除所有按钮的默认焦点样式 */
button, .btn {
    outline: none !important;
    border: none !important;
}

button:focus, button:active, 
.btn:focus, .btn:active {
    outline: none !important;
    border: none !important;
}
/* 表单错误样式 */
.input-error {
    border-color: #ff6b6b !important;
    box-shadow: 0 0 0 2px rgba(255, 107, 107, 0.3) !important;
}

.error-message {
    color: #ff6b6b;
    font-size: 0.9rem;
    margin-top: 5px;
}

/* 表单通知样式 */
.form-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 8px;
    color: #ffffff;
    font-weight: 500;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.form-notification.success {
    background: linear-gradient(90deg, #28a745, #218838);
}

.form-notification.error {
    background: linear-gradient(90deg, #dc3545, #c82333);
}