/* ===== 全局变量 ===== */
:root {
    --primary-color: #0066ff;
    --primary-light: #3385ff;
    --primary-dark: #0052cc;
    --secondary-color: #00d4ff;
    --accent-color: #7c3aed;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;

    --bg-color: #f8fafc;
    --bg-light: #f1f5f9;
    --bg-white: #ffffff;
    --bg-dark: #1e293b;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #94a3b8;

    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    --gradient-primary: linear-gradient(135deg, #0066ff 0%, #00d4ff 100%);
    --gradient-dark: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --gradient-accent: linear-gradient(135deg, #7c3aed 0%, #0066ff 100%);
}

/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

button,
input,
textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.section-header h2 i {
    color: var(--primary-color);
}

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

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 102, 255, 0.3);
}

.btn-outline {
    background: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(0, 102, 255, 0.05);
}

.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

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

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(180deg, #f0f9ff 0%, var(--bg-color) 100%);
    padding-top: 80px;
    overflow: hidden;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-color);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
}

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

.hero-desc {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 4px;
}

/* ===== Hero 视觉效果 ===== */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-circle {
    position: relative;
    width: 400px;
    height: 400px;
}

.ai-circle-inner {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.1;
    animation: pulse 3s ease-in-out infinite;
}

.ai-circle-inner::before {
    content: '';
    position: absolute;
    inset: 20px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    animation: rotate 10s linear infinite;
}

.ai-circle-inner::after {
    content: '';
    position: absolute;
    inset: 60px;
    border-radius: 50%;
    background: var(--gradient-accent);
    opacity: 0.3;
}

@keyframes pulse {

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

    50% {
        transform: scale(1.05);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.floating-cards {
    position: absolute;
    width: 100%;
    height: 100%;
}

.float-card {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.float-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.float-card span {
    font-size: 0.875rem;
    font-weight: 500;
}

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

.card-2 {
    top: 50%;
    right: 0;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20%;
    left: 10%;
    animation-delay: 2s;
}

@keyframes float {

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

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

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}

.hero-wave svg {
    width: 100%;
    height: 120px;
}

/* ===== 服务区域 ===== */
.services {
    padding: 100px 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.service-card {
    background: white;
    padding: 40px 32px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid transparent;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(0, 102, 255, 0.2);
}

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 1.75rem;
    margin-bottom: 24px;
}

.service-icon.icon-blue {
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-color);
}

.service-icon.icon-orange {
    background: rgba(255, 153, 0, 0.1);
    color: #ff9900;
}

.service-icon.icon-purple {
    background: rgba(124, 58, 237, 0.1);
    color: var(--accent-color);
}

.service-icon.icon-green {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.service-icon.icon-orange {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.service-card h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.service-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 500;
    transition: gap 0.3s ease;
}

.service-card:hover .service-link {
    gap: 16px;
}

/* ===== 功能特色 ===== */
.features {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.features-image {
    position: relative;
}

.feature-visual {
    position: relative;
    width: 100%;
    padding-bottom: 100%;
}

.feature-card {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 24px;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.visual-card {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140px;
}

.visual-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.visual-card-2 {
    top: 10%;
    right: 0;
    width: 120px;
}

.visual-card-2 i {
    font-size: 2rem;
    color: var(--success-color);
}

.visual-card-3 {
    bottom: 10%;
    left: 0;
    width: 120px;
}

.visual-card-3 i {
    font-size: 2rem;
    color: var(--accent-color);
}

.feature-lines {
    position: absolute;
    inset: 0;
}

.line {
    position: absolute;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    height: 2px;
    opacity: 0.3;
}

.line:nth-child(1) {
    top: 50%;
    left: 20%;
    width: 30%;
    transform: rotate(-30deg);
}

.line:nth-child(2) {
    top: 30%;
    right: 20%;
    width: 25%;
    transform: rotate(30deg);
}

.line:nth-child(3) {
    bottom: 30%;
    left: 10%;
    width: 40%;
    transform: rotate(-15deg);
}

.feature-item {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
}

.feature-number {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    font-size: 1.25rem;
    font-weight: 700;
    border-radius: 12px;
    flex-shrink: 0;
}

.feature-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-info p {
    color: var(--text-secondary);
}

/* ===== 评审标准 ===== */
.standards {
    padding: 100px 0;
}

.standards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.standard-card {
    background: white;
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.standard-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.standard-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.standard-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.standard-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.standard-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
}

.standard-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
}

/* ===== 移动端服务 ===== */
.mobile-services {
    padding: 100px 0;
    background: var(--bg-light);
}

.mobile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.mobile-card {
    background: white;
    padding: 48px 32px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.mobile-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.mobile-icon {
    width: 150px;
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    background: var(--gradient-primary);
    border-radius: 24px;
    overflow: hidden;
}

.mobile-icon i {
    font-size: 2.5rem;
    color: white;
}

.mobile-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.mobile-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ===== 关于我们 ===== */
.about {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 80px;
}

.about-text h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 24px;
}

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

.about-badges {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 32px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary-color);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.stat-box {
    background: white;
    padding: 32px 24px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.stat-box:nth-child(3) {
    grid-column: span 2;
}

.stat-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    background: rgba(0, 102, 255, 0.1);
    border-radius: 16px;
}

.stat-icon i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

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

/* ===== 联系我们 ===== */
.contact {
    padding: 100px 0;
    background: var(--bg-light);
}

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

.contact-info {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.contact-item {
    display: flex;
    gap: 20px;
    padding: 24px 0;
    border-bottom: 1px solid var(--border-color);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item i {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 102, 255, 0.1);
    border-radius: 12px;
    color: var(--primary-color);
    font-size: 1.25rem;
}

.contact-item h4 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 20px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-logo i {
    color: var(--secondary-color);
}

.footer-section p {
    color: var(--text-light);
    margin-top: 12px;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-section ul li a {
    color: var(--text-light);
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

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

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

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

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

@media (max-width: 768px) {

    .nav-menu,
    .nav-actions {
        display: none;
    }

    .nav-toggle {
        display: block;
    }

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        padding: 20px;
        box-shadow: var(--shadow-lg);
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-desc {
        font-size: 1rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

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

    .stat-box:nth-child(3) {
        grid-column: span 1;
    }

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

/* ===== 动画效果 ===== */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
    opacity: 0;
}

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

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