/* 基础重置与变量 */
:root {
    --primary-color: #3a86ff;
    --secondary-color: #8338ec;
    --accent-color: #ff006e;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gray-color: #6c757d;
    --light-gray: #e9ecef;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

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

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #fefefe;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.8rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.3rem; }
h6 { font-size: 1.1rem; }

p {
    font-size: 1.1rem;
    margin-bottom: 1.2rem;
    color: #444;
}

.small-text { font-size: 0.9rem; }
.large-text { font-size: 1.3rem; }

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-color);
}

:focus-visible {
    outline: 3px solid rgba(58, 134, 255, 0.35);
    outline-offset: 2px;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 84px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title:after {
    content: '';
    position: absolute;
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(58, 134, 255, 0.3);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(58, 134, 255, 0.4);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    box-shadow: none;
}

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

/* 导航栏 */
header {
    background-color: rgba(255, 255, 255, 0.92);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    backdrop-filter: saturate(140%) blur(10px);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 10px;
    color: var(--secondary-color);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    font-weight: 500;
    color: var(--dark-color);
}

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

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 英雄区域 */
.hero {
    background: radial-gradient(700px circle at 20% 10%, rgba(58, 134, 255, 0.18), transparent 55%),
        radial-gradient(700px circle at 90% 0%, rgba(131, 56, 236, 0.16), transparent 52%),
        linear-gradient(135deg, #f5f7ff 0%, #e3e9ff 100%);
    padding: 104px 0;
    overflow: hidden;
}

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

.hero-text {
    flex: 1;
    padding-right: 50px;
}

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

.hero-image img {
    max-width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.hero h1 {
    margin-bottom: 1.5rem;
    color: var(--dark-color);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--gray-color);
}

.cta-buttons {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

/* 特性区域 */
.features {
    background-color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon i {
    font-size: 1.8rem;
    color: white;
}

.stats {
    background-color: var(--light-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.stat-card {
    background-color: white;
    padding: 28px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.stat-value {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 2.2rem;
    line-height: 1.1;
    margin-bottom: 10px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stat-label {
    color: var(--gray-color);
    margin-bottom: 0;
    font-size: 1rem;
}

.scenarios {
    background-color: white;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.scenario-card {
    background-color: white;
    padding: 26px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.scenario-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

.scenario-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.scenario-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: rgba(58, 134, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

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

.how-it-works {
    background: linear-gradient(135deg, #f5f7ff 0%, #e3e9ff 100%);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.step-card {
    background-color: rgba(255, 255, 255, 0.85);
    padding: 28px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.step-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.step-head {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.step-number {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    color: white;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    flex: 0 0 auto;
}

.step-title {
    margin-bottom: 0;
}

.step-card p {
    margin-bottom: 0;
}

/* 下载区域 */
.download {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
}

.download h2, .download p {
    color: white;
}

.download-options {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.download-option {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: var(--border-radius);
    min-width: 250px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.download-option i {
    font-size: 3rem;
    margin-bottom: 20px;
}

/* 用户评价 */
.testimonials {
    background-color: var(--light-color);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.testimonial-card {
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: relative;
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.testimonial-card:before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 20px;
    font-size: 5rem;
    color: var(--light-gray);
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-content {
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    color: white;
    font-weight: bold;
}

.news-embed-wrap {
    margin-top: 40px;
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: white;
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.news-embed {
    width: 100%;
    height: 800px;
    border: 0;
    display: block;
    background-color: white;
}

@media (max-width: 768px) {
    .news-embed {
        height: 860px;
    }
}

/* 常见问题 */
.faq-item {
    margin-bottom: 20px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.faq-question {
    padding: 20px;
    background-color: white;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 4px solid var(--primary-color);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background-color: #f9f9f9;
}

.faq-answer.active {
    padding: 20px;
    max-height: 500px;
}

/* 页脚 */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 70px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-column h4 {
    color: white;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h4:after {
    content: '';
    position: absolute;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
    bottom: 0;
    left: 0;
}

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

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

.footer-links a {
    color: #bbb;
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #aaa;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    h1 { font-size: 2.4rem; }
    h2 { font-size: 2rem; }

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

    .hero-text {
        padding-right: 0;
        margin-bottom: 50px;
        text-align: center;
    }

    .cta-buttons {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 10px 0;
    }

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

    .download-options {
        flex-direction: column;
        align-items: center;
    }

    .download-option {
        width: 100%;
        max-width: 350px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

/* 隐藏的SEO内容 */
.seo-content {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}