/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --accent-color: #ec4899;
    --accent-light: #f472b6;
    --secondary-color: #8b5cf6;
    --warm-color: #f59e0b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-white);
    line-height: 1.6;
}

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

/* ==================== 导航栏 ==================== */
.navbar {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-gray);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

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

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.95rem;
    }

    .btn-large {
        padding: 0.8rem 2rem;
        font-size: 1rem;
    }
}

/* ==================== 英雄区 ==================== */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    text-align: center;
}

.illustration {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 0 auto;
}

.brain-icon {
    font-size: 8rem;
    animation: float 3s ease-in-out infinite;
}

.pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: pulse-animation 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

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

@media (max-width: 1024px) {
    .hero {
        padding: 4rem 0;
    }

    .hero .container {
        flex-direction: column;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .illustration {
        width: 200px;
        height: 200px;
    }

    .brain-icon {
        font-size: 6rem;
    }

    .pulse {
        width: 150px;
        height: 150px;
    }
}

/* ==================== 特点区 ==================== */
.features {
    padding: 6rem 0;
    background: var(--bg-light);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 4rem;
    color: var(--text-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.feature-description {
    color: var(--text-gray);
    line-height: 1.7;
}

/* ==================== 工作流程区 ==================== */
.workflow {
    padding: 6rem 0;
    background: var(--bg-light);
}

.workflow-steps {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 3rem;
}

.step {
    flex: 0 0 auto;
    text-align: center;
    padding: 2rem;
    background: var(--bg-white);
    border-radius: 1rem;
    min-width: 200px;
    box-shadow: var(--shadow-md);
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.step-description {
    color: var(--text-gray);
    font-size: 0.95rem;
}

.step-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
}

@media (max-width: 768px) {
    .workflow-steps {
        flex-direction: column;
        gap: 1rem;
    }

    .step-arrow {
        transform: rotate(90deg);
    }
}

/* ==================== 统计区 ==================== */
.stats {
    padding: 4rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-card {
    padding: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 1rem;
    color: white;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ==================== FAQ区 ==================== */
.faq {
    padding: 6rem 0;
    background: var(--bg-light);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.faq-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.faq-question {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.faq-answer {
    color: var(--text-gray);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* ==================== CTA区 ==================== */
.cta {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.cta-content {
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.cta-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}
/* CTA区内的按钮特殊样式 - 白色大按钮，更明显 */.cta .btn-primary {    background: white !important;    color: var(--primary-color) !important;    padding: 1.5rem 3.5rem !important;    font-size: 1.3rem !important;    font-weight: 700 !important;    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25) !important;    border-radius: 0.75rem !important;}.cta .btn-primary:hover {    transform: translateY(-5px) !important;    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35) !important;}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section {
    opacity: 0.9;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-text {
    font-size: 0.95rem;
    line-height: 1.6;
    opacity: 0.8;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    font-size: 0.95rem;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 2rem;
    text-align: center;
}

.footer-copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    /* 导航栏 */
    .navbar {
        padding: 0.75rem 0;
    }

    .navbar-content {
        padding: 0.75rem 0;
    }

    .logo {
        font-size: 1.1rem;
        gap: 0.5rem;
    }

    .logo-icon {
        font-size: 1.25rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    /* 英雄区 */
    .hero {
        padding: 2.5rem 0;
    }

    .hero .container {
        flex-direction: column;
        gap: 2rem;
    }

    .hero-title {
        font-size: 1.8rem;
        line-height: 1.2;
        margin-bottom: 0.75rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }

    .hero-description {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }

    .btn {
        width: 100%;
        padding: 0.9rem 1.5rem;
        font-size: 0.95rem;
    }

    .btn-large {
        padding: 0.9rem 1.5rem;
        font-size: 1rem;
    }

    .hero-image {
        text-align: center;
    }

    .illustration {
        width: 240px;
        height: 240px;
    }

    .brain-icon {
        font-size: 5rem;
    }

    .pulse {
        width: 140px;
        height: 140px;
    }

    /* 特点区 */
    .features {
        padding: 2.5rem 0;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 1.5rem;
        line-height: 1.2;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }

    .feature-card {
        padding: 1.5rem;
        border-radius: 0.75rem;
    }

    .feature-icon {
        font-size: 2.5rem;
        margin-bottom: 0.75rem;
    }

    .feature-title {
        font-size: 1.1rem;
        margin-bottom: 0.4rem;
    }

    .feature-description {
        font-size: 0.9rem;
        line-height: 1.6;
    }

    /* 工作流程区 */
    .workflow {
        padding: 2.5rem 0;
    }

    .workflow-steps {
        flex-direction: column;
        gap: 0.75rem;
        margin-top: 1.5rem;
    }

    .step {
        flex: 1 0 100%;
        padding: 1.5rem;
        min-width: auto;
        border-radius: 0.75rem;
    }

    .step-number {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
        margin: 0 auto 0.75rem;
    }

    .step-title {
        font-size: 1.1rem;
        margin-bottom: 0.4rem;
    }

    .step-description {
        font-size: 0.85rem;
    }

    .step-arrow {
        font-size: 1.5rem;
        transform: rotate(90deg) !important;
        margin: -0.5rem 0;
    }

    /* 统计区 */
    .stats {
        padding: 2.5rem 0;
    }

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

    .stat-card {
        padding: 1.2rem;
        border-radius: 0.75rem;
    }

    .stat-number {
        font-size: 1.8rem;
        margin-bottom: 0.3rem;
    }

    .stat-label {
        font-size: 0.85rem;
    }

    /* FAQ区 */
    .faq {
        padding: 2.5rem 0;
    }

    .faq-grid {
        grid-template-columns: 1fr;
        gap: 1.2rem;
        margin-top: 1.5rem;
    }

    .faq-item {
        padding: 1.2rem;
        border-radius: 0.75rem;
    }

    .faq-question {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }

    .faq-answer {
        font-size: 0.9rem;
        line-height: 1.6;
    }

    /* CTA区 */
    .cta {
        padding: 2.5rem 0;
    }

    .cta-content {
        text-align: center;
    }

    .cta-title {
        font-size: 1.5rem;
        margin-bottom: 0.75rem;
        line-height: 1.2;
    }

    .cta-subtitle {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    /* 页脚 */
    .footer {
        padding: 2.5rem 0 1.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .footer-section {
        text-align: center;
    }

    .footer-title {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }

    .footer-text {
        font-size: 0.9rem;
    }

    .footer-links li {
        margin-bottom: 0.4rem;
    }

    .footer-links a {
        font-size: 0.9rem;
    }

    .footer-bottom {
        padding-top: 1.5rem;
    }

    .footer-copyright {
        font-size: 0.85rem;
    }
}

/* ==================== 滚动条美化 ==================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.btn-hero {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 3.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.3rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
    text-align: center;
}

.btn-hero:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(99, 102, 241, 0.5);
}