/* ===== 全局样式 ===== */
:root {
    --primary-color: #4a89dc;
    --primary-dark: #3a6cb0;
    --secondary-color: #f8f9fa;
    --text-color: #333;
    --text-light: #666;
    --text-lighter: #999;
    --bg-color: #fff;
    --border-color: #e0e0e0;
    --success-color: #28a745;
    --danger-color: #dc3545;
    ---color: #ffc107;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--secondary-color);
    overflow-x: hidden;
}

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

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

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

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

ul {
    list-style: none;
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.2;
    color: var(--text-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.2rem;
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    line-height: 1;
    color: #fff;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

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

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

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-download {
    background-color: #28a745;
}

.btn-download:hover {
    background-color: #218838;
}

/* ===== 顶部导航 ===== */
header {
    background-color: #fff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

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

.logo img {
    height: 40px;
}

nav ul {
    display: flex;
    gap: 20px;
}

nav a {
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

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

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

nav a:hover::after {
    width: 100%;
}

/* ===== 英雄区域 ===== */
.hero {
    padding: 80px 0;
    background-color: var(--bg-color);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

.download-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.download-buttons .btn {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.download-buttons .btn i {
    margin-right: 8px;
}

.stats {
    display: flex;
    gap: 30px;
}

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

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

.stat-label {
    display: block;
    color: var(--text-light);
    font-size: 0.9rem;
}

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

.hero-image img {
    max-width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ===== 特性区域 ===== */
.features {
    padding: 80px 0;
    background-color: var(--bg-color);
}

.features h2 {
    text-align: center;
    margin-bottom: 50px;
}

.features h2 i {
    color: var(--primary-color);
    margin-right: 10px;
}

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

.feature-card {
    background-color: #fff;
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    line-height: 80px;
    margin: 0 auto 20px;
    background-color: rgba(74, 137, 220, 0.1);
    border-radius: 50%;
    font-size: 2rem;
    color: var(--primary-color);
}

/* ===== 教程预览 ===== */
.tutorial-preview {
    padding: 80px 0;
    background-color: var(--secondary-color);
}

.tutorial-preview h2 {
    text-align: center;
    margin-bottom: 50px;
}

.tutorial-preview h2 i {
    color: var(--primary-color);
    margin-right: 10px;
}

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

.tutorial-card {
    background-color: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.tutorial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.tutorial-thumbnail {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.tutorial-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.tutorial-card:hover .tutorial-thumbnail img {
    transform: scale(1.05);
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    line-height: 60px;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.tutorial-card:hover .play-button {
    background-color: var(--primary-color);
    color: #fff;
}

.tutorial-card h3 {
    padding: 15px 20px 10px;
    font-size: 1.2rem;
}

.tutorial-card p {
    padding: 0 20px 15px;
    color: var(--text-light);
}

.tutorial-card .btn {
    margin: 0 20px 20px;
    display: block;
    width: fit-content;
}

/* ===== 评价区域 ===== */
.reviews {
    padding: 80px 0;
    background-color: var(--bg-color);
}

.reviews h2 {
    text-align: center;
    margin-bottom: 50px;
}

.reviews h2 i {
    color: var(--primary-color);
    margin-right: 10px;
}

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

.review-card {
    background-color: #fff;
    padding: 25px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.review-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.review-header img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 15px;
    object-fit: cover;
}

.review-info {
    display: flex;
    flex-direction: column;
}

.review-name {
    font-weight: 600;
    color: var(--text-color);
}

.review-date {
    font-size: 0.8rem;
    color: var(--text-lighter);
}

.review-rating {
    color: #ffc107;
    margin-bottom: 15px;
}

.review-text {
    font-style: italic;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== FAQ预览 ===== */
.faq-preview {
    padding: 80px 0;
    background-color: var(--secondary-color);
}

.faq-preview h2 {
    text-align: center;
    margin-bottom: 50px;
}

.faq-preview h2 i {
    color: var(--primary-color);
    margin-right: 10px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: #fff;
    margin-bottom: 15px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-item h3 {
    padding: 15px 20px;
    background-color: var(--primary-color);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.faq-item h3:hover {
    background-color: var(--primary-dark);
}

.faq-item h3 i {
    margin-right: 10px;
    transition: var(--transition);
}

.faq-item h3.active i {
    transform: rotate(90deg);
}

.faq-item p {
    padding: 0 20px 20px;
    display: none;
}

.faq-item.active p {
    display: block;
}

.text-center {
    text-align: center;
    margin-top: 30px;
}

/* ===== 软件对比预览 ===== */
.compare-preview {
    padding: 80px 0;
    background-color: var(--bg-color);
}

.compare-preview h2 {
    text-align: center;
    margin-bottom: 20px;
}

.compare-preview h2 i {
    color: var(--primary-color);
    margin-right: 10px;
}

.compare-preview p {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 40px;
}

.compare-table-container {
    overflow-x: auto;
    margin-bottom: 50px;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background-color: #fff;
    box-shadow: var(--shadow);
    border-radius: var(--radius);
    overflow: hidden;
}

.compare-table th,
.compare-table td {
    padding: 15px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.compare-table th {
    background-color: var(--primary-color);
    color: #fff;
    font-weight: 600;
}

.compare-table .compare-category td {
    background-color: #f8f9fa;
    font-weight: 600;
    color: var(--text-color);
}

.compare-table .software-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.compare-table .software-header img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.compare-table i.fa-check-circle.green {
    color: var(--success-color);
    font-size: 1.2rem;
}

.compare-table i.fa-times-circle.red {
    color: var(--danger-color);
    font-size: 1.2rem;
}

.compare-summary {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.compare-summary h2 {
    text-align: center;
    margin-bottom: 20px;
}

.compare-summary h2 i {
    color: var(--primary-color);
    margin-right: 10px;
}

.compare-summary ul {
    margin-bottom: 20px;
}

.compare-summary li {
    margin-bottom: 10px;
    line-height: 1.8;
}

/* ===== 页面头部 ===== */
.page-header {
    padding: 80px 0 40px;
    background-color: var(--bg-color);
    text-align: center;
}

.page-header h1 {
    margin-bottom: 15px;
}

.page-header h1 i {
    color: var(--primary-color);
    margin-right: 10px;
}

.page-header p {
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
    color: var(--text-light);
}

/* ===== 教程页面 ===== */
.tutorial-content {
    padding: 60px 0;
    background-color: var(--secondary-color);
}

.tutorial-nav {
    background-color: #fff;
    padding: 20px 0;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
    border-radius: var(--radius);
}

.tutorial-nav ul {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.tutorial-nav a {
    padding: 10px 20px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.tutorial-nav a:hover,
.tutorial-nav a.active {
    background-color: var(--primary-color);
    color: #fff;
}

article {
    background-color: #fff;
    padding: 30px;
    margin-bottom: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

article h2 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

article h2 i {
    color: var(--primary-color);
    margin-right: 10px;
}

.tutorial-steps {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.step-number {
    width: 50px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    font-size: 1.2rem;
    font-weight: 600;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.step-content img {
    margin: 15px 0;
    border-radius: var(--radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.note {
    background-color: #fff3cd;
    padding: 15px;
    border-radius: var(--radius);
    margin: 15px 0;
    border-left: 4px solid var(---color);
}

.note i {
    color: var(---color);
    margin-right: 8px;
}

.note p {
    margin-bottom: 0;
    color: #856404;
}

/* ===== FAQ页面 ===== */
.faq-content {
    padding: 60px 0;
    background-color: var(--secondary-color);
}

.faq-search {
    max-width: 600px;
    margin: 0 auto 50px;
    display: flex;
    gap: 10px;
}

.faq-search input {
    flex: 1;
    padding: 12px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.faq-search input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 137, 220, 0.1);
}

.faq-search button {
    padding: 12px 20px;
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.faq-search button:hover {
    background-color: var(--primary-dark);
}

.faq-category {
    margin-bottom: 50px;
}

.faq-category h2 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.faq-category h2 i {
    color: var(--primary-color);
    margin-right: 10px;
}

.faq-list {
    display: grid;
    gap: 15px;
}

.faq-item h3 {
    cursor: pointer;
    padding: 15px;
    background-color: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.faq-item h3:hover {
    background-color: #f8f9fa;
}

.faq-item p {
    padding: 0 15px 15px;
    display: none;
    background-color: #f8f9fa;
    border-radius: 0 0 var(--radius) var(--radius);
}

.faq-item.active p {
    display: block;
}

.faq-item pre {
    background-color: #f4f4f4;
    padding: 10px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 10px 0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.faq-item table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

.faq-item th,
.faq-item td {
    padding: 10px;
    text-align: left;
    border: 1px solid var(--border-color);
}

.faq-item th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.status-available {
    color: var(--success-color);
    font-weight: 600;
}

.status-coming {
    color: var(---color);
    font-weight: 600;
}

.status-planned {
    color: var(--text-lighter);
    font-style: italic;
}

/* ===== 对比页面 ===== */
.compare-content {
    padding: 60px 0;
    background-color: var(--secondary-color);
}

.compare-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.compare-intro p {
    font-size: 1.1rem;
    line-height: 1.8;
}

.compare-table-container {
    margin-bottom: 60px;
}

.compare-summary {
    margin-bottom: 50px;
}

.compare-summary p {
    margin-bottom: 15px;
    line-height: 1.8;
}

/* ===== 网页页脚 ===== */
footer {
    background-color: #333;
    color: #fff;
    padding: 50px 0 0;
}

.footer-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-column a {
    color: var(--text-light);
    transition: var(--transition);
}

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

.social-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.social-links a {
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--text-light);
}

.footer-bottom a:hover {
    color: var(--primary-color);
}

/* ===== 回到顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    font-size: 1.2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        margin-bottom: 40px;
    }

    .hero-image {
        order: -1;
    }

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

    .stats {
        justify-content: center;
    }
}

@media (max-width: 992px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.8rem;
    }

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

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 15px;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
        gap: 10px;
        width: 100%;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content .tagline {
        font-size: 1rem;
    }

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

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

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

    .compare-table {
        font-size: 0.8rem;
    }

    .compare-table th,
    .compare-table td {
        padding: 10px 5px;
    }

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

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .download-buttons .btn {
        padding: 12px 15px;
        font-size: 0.9rem;
    }

    .stats {
        flex-direction: column;
        gap: 15px;
    }

    .step {
        flex-direction: column;
    }

    .step-number {
        margin: 0 auto;
    }
}

/* ===== 动画效果 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.features-grid .feature-card,
.tutorial-grid .tutorial-card,
.reviews-grid .review-card {
    animation: fadeIn 0.5s ease forwards;
    opacity: 0;
}

.features-grid .feature-card:nth-child(1),
.tutorial-grid .tutorial-card:nth-child(1),
.reviews-grid .review-card:nth-child(1) {
    animation-delay: 0.1s;
}

.features-grid .feature-card:nth-child(2),
.tutorial-grid .tutorial-card:nth-child(2),
.reviews-grid .review-card:nth-child(2) {
    animation-delay: 0.2s;
}

.features-grid .feature-card:nth-child(3),
.tutorial-grid .tutorial-card:nth-child(3),
.reviews-grid .review-card:nth-child(3) {
    animation-delay: 0.3s;
}

/* ===== 工具类 ===== */
.text-center {
    text-align: center;
}

.green {
    color: var(--success-color);
}

.red {
    color: var(--danger-color);
}