/* ========================================
   CSS 变量定义
   ======================================== */
:root {
    /* 主题色 */
    --color-primary: #ED97B7;
    --color-primary-dark: #D86C9B;
    --color-accent: #3B82F6;
    --color-success: #10B981;

    /* 文字颜色 */
    --color-text: #222222;
    --color-muted: #6B7280;

    /* 背景色 */
    --color-bg: #F9FAFB;
    --color-surface: #FFFFFF;
    --color-border: #E5E7EB;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #ED97B7 0%, #F8BBD0 100%);
    --gradient-hero: linear-gradient(180deg, #FFFFFF 0%, #FFF5F8 100%);

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* 过渡 */
    --transition-base: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

/* ========================================
   返回顶部按钮
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

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

/* ========================================
   头部导航
   ======================================== */
.header {
    position: sticky;
    top: 0;
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
    z-index: 999;
    border-bottom: 2px solid var(--color-primary);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.logo img {
    width: 2rem;
    height: 2rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 1.5rem;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-base);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition-base);
}

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

.nav-cta {
    background: var(--gradient-primary);
    color: white !important;
    padding: 0.5rem 1.5rem !important;
    border-radius: var(--radius-full);
    font-weight: 600;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
    font-size: 1rem;
    line-height: 1.5;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-light {
    background: white;
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* ========================================
   Hero 首屏
   ======================================== */
.hero {
    background: var(--gradient-hero);
    padding: 6rem 0 4rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-muted);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    justify-content: center;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.stat-item i {
    font-size: 2rem;
    color: var(--color-primary);
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--color-muted);
}

/* ========================================
   通用章节样式
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-muted);
}

/* ========================================
   特色功能
   ======================================== */
.features {
    padding: 5rem 0;
    background: var(--color-surface);
}

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

.feature-card {
    padding: 2rem;
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    transition: var(--transition-base);
    border: 2px solid transparent;
}

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

.feature-icon {
    width: 4rem;
    height: 4rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

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

/* ========================================
   内容分类
   ======================================== */
.categories {
    padding: 5rem 0;
    background: var(--color-bg);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
    cursor: pointer;
    border: 2px solid var(--color-border);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

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

.category-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.category-count {
    color: var(--color-muted);
    font-size: 0.875rem;
}

/* ========================================
   阅读体验
   ======================================== */
.experience {
    padding: 5rem 0;
    background: var(--color-surface);
}

.experience-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.experience-features {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.experience-item {
    display: flex;
    gap: 1.5rem;
}

.experience-icon {
    width: 3rem;
    height: 3rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.experience-text h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.experience-text p {
    color: var(--color-muted);
    line-height: 1.7;
}

.experience-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.device-mockup {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 3/4;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
}

.mockup-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: var(--radius-lg);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mockup-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.mockup-dots {
    display: flex;
    gap: 0.5rem;
}

.mockup-dots span {
    width: 0.75rem;
    height: 0.75rem;
    background: var(--color-primary);
    border-radius: 50%;
}

.mockup-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-text);
}

.mockup-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    flex: 1;
}

.mockup-item {
    background: var(--color-bg);
    border-radius: var(--radius-md);
}

/* ========================================
   移动端支持
   ======================================== */
.mobile-support {
    padding: 5rem 0;
    background: var(--color-bg);
}

.mobile-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.mobile-text {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.mobile-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border);
}

.mobile-feature i {
    font-size: 2rem;
    color: var(--color-primary);
}

.mobile-feature span {
    font-weight: 500;
    color: var(--color-text);
}

.mobile-visual {
    display: flex;
    justify-content: center;
}

.mobile-devices {
    position: relative;
}

.device-phone {
    width: 280px;
    height: 560px;
    background: var(--color-text);
    border-radius: 2rem;
    padding: 0.75rem;
    box-shadow: var(--shadow-xl);
}

.device-screen {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 1.5rem;
}

/* ========================================
   用户评价
   ======================================== */
.testimonials {
    padding: 5rem 0;
    background: var(--color-surface);
}

.testimonials-stats {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.stat-box {
    text-align: center;
    padding: 2rem;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    min-width: 200px;
}

.stat-box .stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.stat-stars {
    color: var(--color-primary);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.stat-box .stat-label {
    color: var(--color-muted);
    font-size: 1rem;
}

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

.testimonial-card {
    background: var(--color-bg);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    transition: var(--transition-base);
}

.testimonial-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.testimonial-stars {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.testimonial-text {
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.author-avatar {
    width: 3rem;
    height: 3rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

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

.author-date {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.testimonials-tags {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.tag {
    padding: 0.5rem 1rem;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ========================================
   FAQ
   ======================================== */
.faq {
    padding: 5rem 0;
    background: var(--color-bg);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    overflow: hidden;
    transition: var(--transition-base);
}

.faq-item:hover {
    border-color: var(--color-primary);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    transition: var(--transition-base);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-question i {
    color: var(--color-primary);
    transition: var(--transition-fast);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

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

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--color-muted);
    line-height: 1.7;
}

.inline-link {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: underline;
}

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

/* ========================================
   最终 CTA
   ======================================== */
.final-cta {
    background: var(--gradient-primary);
    padding: 5rem 0;
    text-align: center;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: 3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.25rem;
    color: white;
    opacity: 0.95;
    margin-bottom: 2rem;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-text);
    color: white;
    padding: 3rem 0 1.5rem;
}

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

.footer-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-base);
}

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

.footer-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 2.5rem;
    height: 2.5rem;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--color-primary);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

.footer-notice {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .experience-content,
    .mobile-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .experience-visual,
    .mobile-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 4.5rem;
        left: 0;
        right: 0;
        background: var(--color-surface);
        flex-direction: column;
        align-items: stretch;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        padding: 1rem;
        display: flex;
    }

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

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .section-title {
        font-size: 2rem;
    }

    .cta-title {
        font-size: 2rem;
    }

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

    .testimonials-slider {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0 3rem;
    }

    .hero-title {
        font-size: 2rem;
    }

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

    .stat-item i {
        font-size: 1.5rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-description {
        font-size: 1rem;
    }

    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
    }
}

/* ========================================
   动画效果
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.feature-card,
.category-card,
.testimonial-card {
    animation: fadeInUp 0.6s ease-out;
}

/* 交错动画 */
.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

/* ========================================
   ????????
   ======================================== */
.page-content {
    padding: 5rem 0;
    min-height: 60vh;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.page-description {
    font-size: 1.125rem;
    color: var(--color-muted);
}

/* ========================================
   FAQ????
   ======================================== */
.faq-categories {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.faq-category-btn {
    padding: 0.75rem 1.5rem;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--color-text);
}

.faq-category-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.faq-category-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.contact-section {
    text-align: center;
    margin-top: 3rem;
    padding: 2rem;
    background: var(--color-bg);
    border-radius: var(--radius-xl);
}

.contact-section h2 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.contact-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* ========================================
   ??????
   ======================================== */
.manual-content {
    max-width: 900px;
    margin: 0 auto;
}

.manual-section {
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.manual-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.manual-title i {
    color: var(--color-primary);
}

.manual-text h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.manual-text ul,
.manual-text ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.manual-text li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
    color: var(--color-muted);
}

.manual-text p {
    margin-bottom: 1rem;
    line-height: 1.7;
    color: var(--color-muted);
}

.related-links {
    margin-top: 3rem;
    text-align: center;
}

.related-links h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.link-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.link-card {
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    transition: var(--transition-base);
    text-align: center;
}

.link-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.link-card i {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.link-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.link-card p {
    color: var(--color-muted);
    font-size: 0.875rem;
}

/* ========================================
   ????????
   ======================================== */
.support-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.support-card {
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    text-align: center;
    border: 2px solid var(--color-border);
    transition: var(--transition-base);
}

.support-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.support-icon {
    width: 4rem;
    height: 4rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
}

.support-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.support-card p {
    color: var(--color-muted);
    margin-bottom: 0.5rem;
}

.support-time,
.support-info {
    font-weight: 500;
    color: var(--color-primary);
}

.tech-issues {
    max-width: 900px;
    margin: 3rem auto;
}

.issue-category {
    margin-bottom: 2rem;
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
}

.issue-category h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.issue-category h3 i {
    color: var(--color-primary);
}

.issue-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.issue-item {
    padding: 1.5rem;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
}

.issue-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.system-requirements {
    max-width: 900px;
    margin: 3rem auto;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.requirement-card {
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    border: 2px solid var(--color-border);
}

.requirement-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.requirement-card h3 i {
    color: var(--color-primary);
}

.submit-issue {
    max-width: 900px;
    margin: 3rem auto;
    text-align: center;
}

.contact-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.contact-option {
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.contact-option:hover {
    border-color: var(--color-primary);
    transform: translateY(-3px);
}

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

.contact-option span {
    font-weight: 600;
    color: var(--color-text);
}

.contact-option small {
    color: var(--color-muted);
    font-size: 0.875rem;
}

.tips-box {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    text-align: left;
}

.tips-box h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tips-box i {
    color: var(--color-primary);
}

/* ========================================
   ????????
   ======================================== */
.feedback-intro {
    margin-bottom: 3rem;
}

.intro-card {
    padding: 2rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-xl);
    text-align: center;
}

.intro-card i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.intro-card h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.feedback-types {
    margin-bottom: 3rem;
}

.types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.type-card {
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    text-align: center;
    transition: var(--transition-base);
}

.type-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-3px);
}

.type-card i {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.type-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.type-card p {
    color: var(--color-muted);
    font-size: 0.875rem;
}

.feedback-form-container {
    max-width: 800px;
    margin: 0 auto 3rem;
}

.feedback-form {
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.required {
    color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition-base);
}

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

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

.upload-area {
    padding: 2rem;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-base);
}

.upload-area:hover {
    border-color: var(--color-primary);
    background: var(--color-bg);
}

.upload-area i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--color-muted);
    margin-top: 0.5rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.feedback-guide {
    max-width: 900px;
    margin: 3rem auto;
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.guide-card {
    padding: 1.5rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
}

.guide-number {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.guide-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.guide-card p {
    color: var(--color-muted);
    line-height: 1.7;
}

.template-section {
    max-width: 900px;
    margin: 3rem auto;
}

.template-box {
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
}

.template-code {
    background: var(--color-bg);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 1rem 0;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--color-text);
}

.status-check {
    max-width: 600px;
    margin: 3rem auto;
    text-align: center;
}

.status-form {
    margin-top: 1.5rem;
}

.status-input-group {
    display: flex;
    gap: 1rem;
}

.status-input-group input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.other-contacts {
    max-width: 900px;
    margin: 3rem auto;
}

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

.contact-card {
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    border: 2px solid var(--color-border);
    text-align: center;
}

.contact-card i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.contact-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.contact-card p {
    color: var(--color-muted);
    margin-bottom: 1.5rem;
}

.quick-help {
    max-width: 800px;
    margin: 2rem auto;
    padding: 1.5rem;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    text-align: center;
}

.quick-help i {
    color: var(--color-primary);
    margin-right: 0.5rem;
}

/* ========================================
   ??????
   ======================================== */
.legal-page {
    background: var(--color-bg);
}

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

.legal-section {
    margin-bottom: 2.5rem;
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
}

.legal-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-border);
}

.legal-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

.legal-section p {
    line-height: 1.7;
    color: var(--color-muted);
    margin-bottom: 1rem;
}

.legal-section ul,
.legal-section ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.legal-section li {
    line-height: 1.7;
    color: var(--color-muted);
    margin-bottom: 0.5rem;
}

.legal-section strong {
    color: var(--color-text);
    font-weight: 600;
}

.legal-notice {
    padding: 1.5rem;
    background: var(--color-bg);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    margin-top: 2rem;
}

.legal-notice i {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-right: 0.5rem;
}

.legal-notice p {
    margin: 0;
    line-height: 1.7;
}

/* ========================================
   ?????
   ======================================== */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    .status-input-group {
        flex-direction: column;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }

    .faq-categories {
        flex-direction: column;
    }

    .faq-category-btn {
        width: 100%;
        justify-content: center;
    }
}

/* ========================================
   ??????
   ======================================== */

/* ???? */
.article-content {
    max-width: 900px;
    margin: 0 auto;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
}

/* ???? */
.article-header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--color-border);
}

.article-category {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #ED97B7 0%, #F8BBD0 100%);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.meta-item i {
    color: var(--color-primary);
}

/* ???? */
.article-body {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text);
}

.article-body .lead-text {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-muted);
    margin-bottom: 2.5rem;
    padding: 1.5rem;
    background: #FFF5F8;
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
}

.article-body h2 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--color-text);
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-border);
}

.article-body h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.article-body p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

.article-body ul,
.article-body ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.article-body li {
    margin-bottom: 0.75rem;
}

.article-body strong {
    color: var(--color-text);
    font-weight: 600;
}

/* ??? */
.highlight-box {
    background: linear-gradient(135deg, #FFF5F8 0%, #FFF0F5 100%);
    border: 2px solid #FFCCE0;
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin: 2.5rem 0;
}

.highlight-box h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-top: 0;
    margin-bottom: 1.25rem;
}

.highlight-box h3 i {
    font-size: 1.5rem;
}

.highlight-box ul {
    margin-bottom: 0;
}

.highlight-box li {
    margin-bottom: 1rem;
}

.highlight-box li:last-child {
    margin-bottom: 0;
}

/* ??? */
.tip-box {
    background: #F0F9FF;
    border: 2px solid #BAE6FD;
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    margin: 2rem 0;
}

.tip-box h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 700;
    color: #0369A1;
    margin-top: 0;
    margin-bottom: 1rem;
}

.tip-box h3 i {
    font-size: 1.25rem;
}

.tip-box p {
    margin-bottom: 0;
    color: #075985;
}

/* ?????? */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2.5rem 0;
}

.stat-card {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-base);
}

.stat-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-muted);
    font-weight: 500;
}

/* ???? */
.feature-list {
    list-style: none;
    padding-left: 0;
    margin: 2rem 0;
}

.feature-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1.25rem;
}

.feature-list li:before {
    content: "?";
    position: absolute;
    left: 0;
    top: 0;
    width: 1.5rem;
    height: 1.5rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

/* ???? */
.user-quote {
    background: #F9FAFB;
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
}

.user-quote p {
    margin-bottom: 1rem;
    color: var(--color-text);
    font-size: 1.125rem;
}

.user-quote cite {
    display: block;
    text-align: right;
    color: var(--color-muted);
    font-style: normal;
    font-weight: 600;
    font-size: 0.95rem;
}

/* ??CTA */
.article-cta {
    text-align: center;
    margin: 3rem 0;
    padding: 2.5rem;
    background: linear-gradient(135deg, #FFF5F8 0%, #FFF0F5 100%);
    border-radius: var(--radius-xl);
}

/* ???? */
.related-articles {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 2px solid var(--color-border);
}

.related-articles h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 2rem;
    text-align: center;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.related-card {
    display: block;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-base);
    text-decoration: none;
}

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

.related-icon {
    width: 3.5rem;
    height: 3.5rem;
    margin: 0 auto 1rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.related-card h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.related-card p {
    font-size: 0.95rem;
    color: var(--color-muted);
    margin-bottom: 0;
}

/* ????? - ???? */
@media (max-width: 768px) {
    .article-content {
        padding: 2rem 1.5rem;
        border-radius: var(--radius-lg);
    }

    .article-title {
        font-size: 1.875rem;
    }

    .article-body {
        font-size: 1rem;
    }

    .article-body .lead-text {
        font-size: 1.125rem;
    }

    .article-body h2 {
        font-size: 1.5rem;
        margin-top: 2rem;
    }

    .article-body h3 {
        font-size: 1.25rem;
    }

    .article-meta {
        gap: 1rem;
        font-size: 0.875rem;
    }

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

    .stat-card {
        padding: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

    .highlight-box,
    .tip-box {
        padding: 1.5rem;
    }
}