:root {
    --primary: #db2777;
    --accent: #f43f5e;
    --bg: #fff1f5;
    --text: #500724;
    --radius-lg: 24px;
    --radius-md: 16px;
    --shadow-soft: 0 8px 30px rgba(219, 39, 119, 0.08);
    --shadow-hover: 0 16px 40px rgba(219, 39, 119, 0.15);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

/* 滚动进度条 */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    z-index: 9999;
    border-radius: 0 2px 2px 0;
    transition: width 0.15s ease-out;
}

/* 导航栏 */
.navbar-custom {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 2px 20px rgba(219, 39, 119, 0.06);
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand-custom {
    font-weight: 800;
    font-size: 1.6rem;
    color: var(--primary) !important;
    letter-spacing: 0.5px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.navbar-brand-custom i {
    font-size: 1.4rem;
    color: var(--accent);
}

.navbar-custom .nav-link {
    color: var(--text) !important;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 8px 18px !important;
    border-radius: 30px;
    transition: all 0.3s ease;
}

.navbar-custom .nav-link:hover {
    color: var(--primary) !important;
    background: rgba(219, 39, 119, 0.06);
}

.navbar-custom .navbar-toggler {
    border: none;
    font-size: 1.4rem;
    color: var(--primary);
}

/* 通用区块 */
.section {
    padding: 80px 0;
    position: relative;
}

.section-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    padding: 6px 18px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.1rem;
    color: rgba(80, 7, 36, 0.7);
    max-width: 700px;
    margin: 0 auto 40px;
}

/* Hero 区 */
.hero-section {
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(219, 39, 119, 0.15), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(244, 63, 94, 0.12), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--text);
    line-height: 1.15;
    margin-bottom: 24px;
}

.hero-title .highlight {
    color: var(--primary);
    position: relative;
    display: inline-block;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 10px;
    background: rgba(219, 39, 119, 0.2);
    border-radius: 10px;
    z-index: -1;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(80, 7, 36, 0.75);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-custom-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    border: none;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 8px 24px rgba(219, 39, 119, 0.3);
    text-decoration: none;
    display: inline-block;
}

.btn-custom-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(219, 39, 119, 0.4);
    color: #fff;
}

.btn-custom-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 12px 34px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-custom-outline:hover {
    background: rgba(219, 39, 119, 0.08);
    transform: translateY(-3px);
    color: var(--primary);
}

/* 时间线 / 步骤条 */
.timeline-container {
    position: relative;
    padding: 40px 0;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary), var(--accent), var(--primary));
    transform: translateX(-50%);
    border-radius: 3px;
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    width: 100%;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: calc(50% + 40px);
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: calc(50% + 40px);
}

.timeline-number {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    box-shadow: 0 8px 24px rgba(219, 39, 119, 0.3);
    z-index: 2;
}

.timeline-content {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    border: 1px solid rgba(219, 39, 119, 0.08);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.timeline-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.timeline-content p {
    color: rgba(80, 7, 36, 0.7);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* 特色对比表格 */
.features-section {
    background: #fff;
}

.comparison-table-wrap {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
    border: 1px solid rgba(219, 39, 119, 0.08);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 20px 24px;
    text-align: center;
    border-bottom: 1px solid rgba(219, 39, 119, 0.06);
}

.comparison-table th {
    background: linear-gradient(135deg, rgba(219, 39, 119, 0.05), rgba(244, 63, 94, 0.05));
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--text);
}

.comparison-table td {
    font-size: 0.95rem;
    color: rgba(80, 7, 36, 0.8);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table .feature-check {
    color: var(--primary);
    font-size: 1.2rem;
    font-weight: 700;
}

.comparison-table .feature-cross {
    color: #ccc;
    font-size: 1.2rem;
}

.comparison-table .feature-text {
    font-weight: 600;
    color: var(--text);
}

/* FAQ 折叠 */
.faq-section {
    background: var(--bg);
}

.faq-item {
    background: #fff;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(219, 39, 119, 0.06);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow-hover);
}

.faq-item summary {
    padding: 22px 28px;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.6rem;
    font-weight: 300;
    color: var(--primary);
    transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
    content: '−';
    transform: rotate(180deg);
}

.faq-item .faq-answer {
    padding: 0 28px 22px;
    color: rgba(80, 7, 36, 0.75);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* 介绍编号清单 */
.intro-section {
    background: #fff;
}

.steps-list {
    counter-reset: step-counter;
    list-style: none;
    padding: 0;
    max-width: 800px;
    margin: 0 auto;
}

.steps-list li {
    counter-increment: step-counter;
    position: relative;
    padding: 24px 24px 24px 80px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    border: 1px solid rgba(219, 39, 119, 0.05);
}

.steps-list li:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.steps-list li::before {
    content: counter(step-counter, decimal-leading-zero);
    position: absolute;
    left: 24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary);
    opacity: 0.25;
}

.steps-list li h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.steps-list li p {
    font-size: 0.92rem;
    color: rgba(80, 7, 36, 0.7);
    margin-bottom: 0;
}

/* CTA 区块 */
.cta-section {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.cta-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.1rem;
    opacity: 0.95;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn-cta-light {
    background: #fff;
    color: var(--primary);
    border: none;
    padding: 16px 44px;
    border-radius: 50px;
    font-weight: 800;
    font-size: 1.05rem;
    transition: all 0.3s ease;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    text-decoration: none;
    display: inline-block;
}

.btn-cta-light:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
    color: var(--primary);
}

/* 友情链接 */
.friend-links-section {
    background: #fff;
    padding: 50px 0;
    border-top: 1px solid rgba(219, 39, 119, 0.06);
}

.friend-links-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: rgba(80, 7, 36, 0.5);
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.friend-links-content {
    text-align: center;
    color: rgba(80, 7, 36, 0.5);
    font-size: 0.9rem;
}

/* 页脚 */
.footer-section {
    background: var(--text);
    color: rgba(255, 255, 255, 0.8);
    padding: 40px 0;
    position: relative;
}

.footer-brand {
    font-size: 1.4rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}

.footer-links {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.footer-copyright {
    font-size: 0.85rem;
    opacity: 0.6;
    text-align: center;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .timeline-container::before {
        left: 24px;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 70px;
        margin-right: 0;
    }
    
    .timeline-number {
        left: 24px;
        transform: translateX(-50%);
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 14px 10px;
        font-size: 0.8rem;
    }
    
    .cta-content h2 {
        font-size: 1.8rem;
    }
    
    .steps-list li {
        padding: 20px 20px 20px 65px;
    }
    
    .steps-list li::before {
        left: 20px;
        font-size: 1.4rem;
    }
}

/* 渐显占位动画 */
.img-placeholder {
    background: linear-gradient(90deg, rgba(219, 39, 119, 0.06), rgba(219, 39, 119, 0.12), rgba(219, 39, 119, 0.06));
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
    min-height: 120px;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

img.lazy-load {
    opacity: 0;
    transition: opacity 0.5s ease;
}

img.lazy-load.loaded {
    opacity: 1;
}