/* ============================================
   热点事件复盘资料站 - 全站样式表
   CSS前缀: b2s01k01n05-ripple-
   Mobile-First响应式设计
   ============================================ */

/* === 基础重置与变量 === */
:root {
    --b2s01k01n05-ripple-primary: #1a56db;
    --b2s01k01n05-ripple-primary-dark: #1240a8;
    --b2s01k01n05-ripple-secondary: #0e9f6e;
    --b2s01k01n05-ripple-accent: #ff6b35;
    --b2s01k01n05-ripple-dark: #1f2937;
    --b2s01k01n05-ripple-gray: #6b7280;
    --b2s01k01n05-ripple-light: #f9fafb;
    --b2s01k01n05-ripple-border: #e5e7eb;
    --b2s01k01n05-ripple-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    --b2s01k01n05-ripple-radius: 8px;
    --b2s01k01n05-ripple-transition: all 0.3s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    color: var(--b2s01k01n05-ripple-dark);
    background-color: #fff;
}

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

a {
    color: var(--b2s01k01n05-ripple-primary);
    text-decoration: none;
    transition: var(--b2s01k01n05-ripple-transition);
}

a:hover {
    color: var(--b2s01k01n05-ripple-primary-dark);
    text-decoration: underline;
}

/* === 布局容器 === */
.b2s01k01n05-ripple-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

.b2s01k01n05-ripple-section {
    padding: 48px 0;
}

.b2s01k01n05-ripple-section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--b2s01k01n05-ripple-dark);
    position: relative;
    padding-bottom: 12px;
}

.b2s01k01n05-ripple-section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--b2s01k01n05-ripple-primary);
    border-radius: 2px;
}

/* === 头部导航 === */
.b2s01k01n05-ripple-header {
    background: #fff;
    border-bottom: 1px solid var(--b2s01k01n05-ripple-border);
    position: relative;
    z-index: 100;
}

.b2s01k01n05-ripple-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    max-width: 1200px;
    margin: 0 auto;
}

.b2s01k01n05-ripple-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.b2s01k01n05-ripple-logo img {
    height: 40px;
    width: auto;
}

.b2s01k01n05-ripple-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--b2s01k01n05-ripple-dark);
}

.b2s01k01n05-ripple-nav-list {
    display: none;
    list-style: none;
    gap: 0;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--b2s01k01n05-ripple-border);
    padding: 16px;
    box-shadow: var(--b2s01k01n05-ripple-shadow);
}

.b2s01k01n05-ripple-nav-list.b2s01k01n05-ripple-nav-active {
    display: flex;
}

.b2s01k01n05-ripple-nav-item {
    margin: 0;
}

.b2s01k01n05-ripple-link-element {
    display: block;
    padding: 10px 0;
    color: var(--b2s01k01n05-ripple-dark);
    font-weight: 500;
    border-bottom: 1px solid var(--b2s01k01n05-ripple-border);
}

.b2s01k01n05-ripple-link-element:hover {
    color: var(--b2s01k01n05-ripple-primary);
    text-decoration: none;
}

.b2s01k01n05-ripple-menu-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
    color: var(--b2s01k01n05-ripple-dark);
}

/* === Banner区 === */
.b2s01k01n05-ripple-banner {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.b2s01k01n05-ripple-banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.b2s01k01n05-ripple-banner-content {
    position: relative;
    z-index: 2;
    padding: 60px 16px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.b2s01k01n05-ripple-banner-title {
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.3;
}

.b2s01k01n05-ripple-banner-desc {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 24px;
    max-width: 600px;
}

.b2s01k01n05-ripple-cta-btn {
    display: inline-block;
    padding: 14px 32px;
    background: var(--b2s01k01n05-ripple-accent);
    color: #fff;
    font-weight: 600;
    border-radius: var(--b2s01k01n05-ripple-radius);
    transition: var(--b2s01k01n05-ripple-transition);
    text-decoration: none;
}

.b2s01k01n05-ripple-cta-btn:hover {
    background: #e55a2b;
    color: #fff;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(255,107,53,0.3);
}

.b2s01k01n05-ripple-cta-btn-secondary {
    background: transparent;
    border: 2px solid #fff;
    margin-left: 12px;
}

.b2s01k01n05-ripple-cta-btn-secondary:hover {
    background: #fff;
    color: var(--b2s01k01n05-ripple-dark);
}

/* === 视频区 === */
.b2s01k01n05-ripple-video-section {
    background: var(--b2s01k01n05-ripple-light);
}

.b2s01k01n05-ripple-video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: var(--b2s01k01n05-ripple-radius);
    box-shadow: var(--b2s01k01n05-ripple-shadow);
}

.b2s01k01n05-ripple-video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* === 卡片网格 === */
.b2s01k01n05-ripple-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.b2s01k01n05-ripple-card {
    background: #fff;
    border: 1px solid var(--b2s01k01n05-ripple-border);
    border-radius: var(--b2s01k01n05-ripple-radius);
    padding: 24px;
    transition: var(--b2s01k01n05-ripple-transition);
}

.b2s01k01n05-ripple-card:hover {
    box-shadow: var(--b2s01k01n05-ripple-shadow);
    transform: translateY(-4px);
}

.b2s01k01n05-ripple-card-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: var(--b2s01k01n05-ripple-radius);
    margin-bottom: 16px;
}

.b2s01k01n05-ripple-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--b2s01k01n05-ripple-dark);
}

.b2s01k01n05-ripple-card-meta {
    font-size: 0.85rem;
    color: var(--b2s01k01n05-ripple-gray);
    margin-bottom: 12px;
}

.b2s01k01n05-ripple-card-text {
    font-size: 0.95rem;
    color: #4b5563;
    line-height: 1.6;
}

/* === 特点/优势区 === */
.b2s01k01n05-ripple-features {
    background: var(--b2s01k01n05-ripple-light);
}

.b2s01k01n05-ripple-feature-item {
    text-align: center;
    padding: 32px 20px;
}

.b2s01k01n05-ripple-feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: var(--b2s01k01n05-ripple-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
}

.b2s01k01n05-ripple-feature-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

/* === FAQ区 === */
.b2s01k01n05-ripple-faq-item {
    border: 1px solid var(--b2s01k01n05-ripple-border);
    border-radius: var(--b2s01k01n05-ripple-radius);
    margin-bottom: 12px;
    overflow: hidden;
}

.b2s01k01n05-ripple-faq-question {
    padding: 16px 20px;
    font-weight: 600;
    cursor: pointer;
    background: var(--b2s01k01n05-ripple-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.b2s01k01n05-ripple-faq-answer {
    padding: 16px 20px;
    color: #4b5563;
    line-height: 1.8;
    display: none;
}

.b2s01k01n05-ripple-faq-item.b2s01k01n05-ripple-faq-active .b2s01k01n05-ripple-faq-answer {
    display: block;
}

/* === 商业信任区 === */
.b2s01k01n05-ripple-trust {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.b2s01k01n05-ripple-trust-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
    align-items: center;
}

.b2s01k01n05-ripple-trust-badge {
    text-align: center;
    padding: 16px;
}

.b2s01k01n05-ripple-trust-badge strong {
    display: block;
    font-size: 2rem;
    color: var(--b2s01k01n05-ripple-primary);
}

/* === 面包屑 === */
.b2s01k01n05-ripple-breadcrumb {
    padding: 12px 0;
    font-size: 0.9rem;
    color: var(--b2s01k01n05-ripple-gray);
}

.b2s01k01n05-ripple-breadcrumb a {
    color: var(--b2s01k01n05-ripple-gray);
}

.b2s01k01n05-ripple-breadcrumb span {
    margin: 0 8px;
}

/* === 文章页 === */
.b2s01k01n05-ripple-article-header {
    margin-bottom: 32px;
}

.b2s01k01n05-ripple-article-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.b2s01k01n05-ripple-article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    color: var(--b2s01k01n05-ripple-gray);
    font-size: 0.9rem;
}

.b2s01k01n05-ripple-article-content {
    line-height: 1.9;
    font-size: 1rem;
}

.b2s01k01n05-ripple-article-content h2 {
    font-size: 1.4rem;
    margin: 32px 0 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--b2s01k01n05-ripple-border);
}

.b2s01k01n05-ripple-article-content h3 {
    font-size: 1.2rem;
    margin: 24px 0 12px;
}

.b2s01k01n05-ripple-article-content p {
    margin-bottom: 16px;
}

/* === 侧边栏 === */
.b2s01k01n05-ripple-sidebar {
    margin-top: 32px;
}

.b2s01k01n05-ripple-sidebar-widget {
    background: var(--b2s01k01n05-ripple-light);
    border-radius: var(--b2s01k01n05-ripple-radius);
    padding: 20px;
    margin-bottom: 24px;
}

.b2s01k01n05-ripple-sidebar-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--b2s01k01n05-ripple-primary);
}

/* === 表单 === */
.b2s01k01n05-ripple-form-group {
    margin-bottom: 20px;
}

.b2s01k01n05-ripple-form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--b2s01k01n05-ripple-dark);
}

.b2s01k01n05-ripple-form-input,
.b2s01k01n05-ripple-form-textarea,
.b2s01k01n05-ripple-form-select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--b2s01k01n05-ripple-border);
    border-radius: var(--b2s01k01n05-ripple-radius);
    font-size: 1rem;
    transition: var(--b2s01k01n05-ripple-transition);
    font-family: inherit;
}

.b2s01k01n05-ripple-form-input:focus,
.b2s01k01n05-ripple-form-textarea:focus {
    outline: none;
    border-color: var(--b2s01k01n05-ripple-primary);
    box-shadow: 0 0 0 3px rgba(26,86,219,0.1);
}

.b2s01k01n05-ripple-form-textarea {
    min-height: 120px;
    resize: vertical;
}

.b2s01k01n05-ripple-form-submit {
    display: inline-block;
    padding: 14px 40px;
    background: var(--b2s01k01n05-ripple-primary);
    color: #fff;
    border: none;
    border-radius: var(--b2s01k01n05-ripple-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--b2s01k01n05-ripple-transition);
}

.b2s01k01n05-ripple-form-submit:hover {
    background: var(--b2s01k01n05-ripple-primary-dark);
    transform: translateY(-2px);
}

/* === 页脚 === */
.b2s01k01n05-ripple-footer {
    background: var(--b2s01k01n05-ripple-dark);
    color: #d1d5db;
    padding: 48px 0 24px;
}

.b2s01k01n05-ripple-footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 32px;
}

.b2s01k01n05-ripple-footer-title {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.b2s01k01n05-ripple-footer-links {
    list-style: none;
}

.b2s01k01n05-ripple-footer-links li {
    margin-bottom: 8px;
}

.b2s01k01n05-ripple-footer-links a {
    color: #9ca3af;
    font-size: 0.9rem;
}

.b2s01k01n05-ripple-footer-links a:hover {
    color: #fff;
}

.b2s01k01n05-ripple-footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: #9ca3af;
}

.b2s01k01n05-ripple-footer-social {
    display: flex;
    gap: 16px;
    margin-top: 12px;
    justify-content: center;
}

.b2s01k01n05-ripple-footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #374151;
    color: #d1d5db;
    font-size: 0.9rem;
    transition: var(--b2s01k01n05-ripple-transition);
}

.b2s01k01n05-ripple-footer-social a:hover {
    background: var(--b2s01k01n05-ripple-primary);
    color: #fff;
    text-decoration: none;
}

/* === 时间线工具 === */
.b2s01k01n05-ripple-timeline {
    position: relative;
    padding-left: 32px;
}

.b2s01k01n05-ripple-timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--b2s01k01n05-ripple-primary);
}

.b2s01k01n05-ripple-timeline-item {
    position: relative;
    margin-bottom: 24px;
    padding: 16px;
    background: var(--b2s01k01n05-ripple-light);
    border-radius: var(--b2s01k01n05-ripple-radius);
}

.b2s01k01n05-ripple-timeline-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 20px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--b2s01k01n05-ripple-primary);
    border: 2px solid #fff;
}

.b2s01k01n05-ripple-timeline-date {
    font-size: 0.85rem;
    color: var(--b2s01k01n05-ripple-primary);
    font-weight: 600;
    margin-bottom: 4px;
}

/* === 页面特定 === */
.b2s01k01n05-ripple-page-header {
    background: linear-gradient(135deg, #1a56db 0%, #0e9f6e 100%);
    padding: 48px 16px;
    color: #fff;
    text-align: center;
}

.b2s01k01n05-ripple-page-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.b2s01k01n05-ripple-page-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* === 列表页 === */
.b2s01k01n05-ripple-list-item {
    display: flex;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--b2s01k01n05-ripple-border);
    flex-direction: column;
}

.b2s01k01n05-ripple-list-thumb {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: var(--b2s01k01n05-ripple-radius);
    flex-shrink: 0;
}

/* === 响应式断点 === */
@media (min-width: 480px) {
    .b2s01k01n05-ripple-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .b2s01k01n05-ripple-list-item {
        flex-direction: row;
    }
    
    .b2s01k01n05-ripple-list-thumb {
        width: 200px;
        height: 140px;
    }
}

@media (min-width: 768px) {
    .b2s01k01n05-ripple-banner-title {
        font-size: 2.5rem;
    }
    
    .b2s01k01n05-ripple-footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .b2s01k01n05-ripple-section {
        padding: 64px 0;
    }
    
    .b2s01k01n05-ripple-page-layout {
        display: grid;
        grid-template-columns: 1fr 300px;
        gap: 32px;
    }
    
    .b2s01k01n05-ripple-sidebar {
        margin-top: 0;
    }
}

@media (min-width: 992px) {
    .b2s01k01n05-ripple-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .b2s01k01n05-ripple-footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .b2s01k01n05-ripple-nav-list {
        display: flex !important;
        position: static;
        flex-direction: row;
        background: transparent;
        border: none;
        padding: 0;
        box-shadow: none;
        gap: 4px;
    }
    
    .b2s01k01n05-ripple-link-element {
        padding: 8px 14px;
        border-bottom: none;
        border-radius: var(--b2s01k01n05-ripple-radius);
    }
    
    .b2s01k01n05-ripple-link-element:hover {
        background: var(--b2s01k01n05-ripple-light);
    }
    
    .b2s01k01n05-ripple-menu-toggle {
        display: none;
    }
}

@media (min-width: 1200px) {
    .b2s01k01n05-ripple-container {
        padding: 0 24px;
    }
    
    .b2s01k01n05-ripple-banner {
        min-height: 500px;
    }
    
    .b2s01k01n05-ripple-banner-title {
        font-size: 3rem;
    }
}