/* ===== 全站基础样式 - 日更主题创作征集站 ===== */
/* CSS前缀: b2s01k05n01-ripple- */

:root {
    --b2s01k05n01-ripple-primary: #2c5f7c;
    --b2s01k05n01-ripple-secondary: #e8a838;
    --b2s01k05n01-ripple-accent: #c75b39;
    --b2s01k05n01-ripple-dark: #1a1a2e;
    --b2s01k05n01-ripple-light: #f8f5f0;
    --b2s01k05n01-ripple-gray: #6b7280;
    --b2s01k05n01-ripple-border: #e5e7eb;
    --b2s01k05n01-ripple-white: #ffffff;
    --b2s01k05n01-ripple-text: #333333;
    --b2s01k05n01-ripple-font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

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

body {
    font-family: var(--b2s01k05n01-ripple-font);
    color: var(--b2s01k05n01-ripple-text);
    background-color: var(--b2s01k05n01-ripple-light);
    line-height: 1.8;
}

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

a {
    color: var(--b2s01k05n01-ripple-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--b2s01k05n01-ripple-accent);
}

/* ===== 头部导航 ===== */
.b2s01k05n01-ripple-header {
    background: var(--b2s01k05n01-ripple-white);
    border-bottom: 1px solid var(--b2s01k05n01-ripple-border);
    padding: 0 20px;
}

.b2s01k05n01-ripple-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.b2s01k05n01-ripple-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.b2s01k05n01-ripple-logo img {
    height: 42px;
    width: auto;
}

.b2s01k05n01-ripple-nav-list {
    display: flex;
    list-style: none;
    gap: 0;
}

.b2s01k05n01-ripple-nav-item {
    position: relative;
}

.b2s01k05n01-ripple-link-element {
    display: block;
    padding: 24px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--b2s01k05n01-ripple-text);
    transition: color 0.3s, background 0.3s;
}

.b2s01k05n01-ripple-link-element:hover,
.b2s01k05n01-ripple-link-element.active {
    color: var(--b2s01k05n01-ripple-primary);
    background: rgba(44, 95, 124, 0.05);
}

.b2s01k05n01-ripple-mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
}

/* ===== Banner区 ===== */
.b2s01k05n01-ripple-banner {
    position: relative;
    height: 520px;
    overflow: hidden;
    background: var(--b2s01k05n01-ripple-dark);
}

.b2s01k05n01-ripple-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
    filter: saturate(0.8) contrast(1.1);
}

.b2s01k05n01-ripple-banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    background: linear-gradient(180deg, rgba(26,26,46,0.3) 0%, rgba(26,26,46,0.6) 100%);
}

.b2s01k05n01-ripple-banner-title {
    font-size: 2.8rem;
    color: var(--b2s01k05n01-ripple-white);
    margin-bottom: 16px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.4);
    letter-spacing: 2px;
}

.b2s01k05n01-ripple-banner-desc {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 28px;
    max-width: 600px;
}

.b2s01k05n01-ripple-btn-primary {
    display: inline-block;
    padding: 14px 36px;
    background: var(--b2s01k05n01-ripple-secondary);
    color: var(--b2s01k05n01-ripple-white);
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    transition: background 0.3s, transform 0.2s;
    border: none;
    cursor: pointer;
}

.b2s01k05n01-ripple-btn-primary:hover {
    background: var(--b2s01k05n01-ripple-accent);
    color: var(--b2s01k05n01-ripple-white);
    transform: translateY(-2px);
}

.b2s01k05n01-ripple-btn-secondary {
    display: inline-block;
    padding: 12px 28px;
    background: transparent;
    color: var(--b2s01k05n01-ripple-primary);
    border: 2px solid var(--b2s01k05n01-ripple-primary);
    border-radius: 6px;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s;
}

.b2s01k05n01-ripple-btn-secondary:hover {
    background: var(--b2s01k05n01-ripple-primary);
    color: var(--b2s01k05n01-ripple-white);
}

/* ===== 通用容器 ===== */
.b2s01k05n01-ripple-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.b2s01k05n01-ripple-section {
    padding: 60px 0;
}

.b2s01k05n01-ripple-section-title {
    font-size: 1.8rem;
    color: var(--b2s01k05n01-ripple-dark);
    text-align: center;
    margin-bottom: 16px;
    position: relative;
}

.b2s01k05n01-ripple-section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--b2s01k05n01-ripple-secondary);
    margin: 12px auto 0;
    border-radius: 2px;
}

.b2s01k05n01-ripple-section-desc {
    text-align: center;
    color: var(--b2s01k05n01-ripple-gray);
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 15px;
}

/* ===== 视频区 ===== */
.b2s01k05n01-ripple-video-section {
    background: var(--b2s01k05n01-ripple-dark);
    padding: 50px 0;
}

.b2s01k05n01-ripple-video-wrapper {
    max-width: 800px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.b2s01k05n01-ripple-video-wrapper video {
    width: 100%;
    display: block;
}

/* ===== 栏目卡片网格 ===== */
.b2s01k05n01-ripple-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.b2s01k05n01-ripple-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.b2s01k05n01-ripple-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.b2s01k05n01-ripple-card {
    background: var(--b2s01k05n01-ripple-white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    transition: transform 0.3s, box-shadow 0.3s;
}

.b2s01k05n01-ripple-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.b2s01k05n01-ripple-card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.b2s01k05n01-ripple-card-body {
    padding: 20px;
}

.b2s01k05n01-ripple-card-title {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--b2s01k05n01-ripple-dark);
}

.b2s01k05n01-ripple-card-text {
    font-size: 14px;
    color: var(--b2s01k05n01-ripple-gray);
    line-height: 1.6;
}

.b2s01k05n01-ripple-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-top: 1px solid var(--b2s01k05n01-ripple-border);
    font-size: 13px;
    color: var(--b2s01k05n01-ripple-gray);
}

/* ===== 优势区块 ===== */
.b2s01k05n01-ripple-features {
    background: var(--b2s01k05n01-ripple-white);
}

.b2s01k05n01-ripple-feature-item {
    text-align: center;
    padding: 30px 20px;
}

.b2s01k05n01-ripple-feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: rgba(44, 95, 124, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.b2s01k05n01-ripple-feature-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--b2s01k05n01-ripple-dark);
}

.b2s01k05n01-ripple-feature-desc {
    font-size: 14px;
    color: var(--b2s01k05n01-ripple-gray);
}

/* ===== 互动工具区 ===== */
.b2s01k05n01-ripple-tool-section {
    background: linear-gradient(135deg, #f0f7ff 0%, #fff5eb 100%);
}

.b2s01k05n01-ripple-tool-box {
    max-width: 600px;
    margin: 0 auto;
    background: var(--b2s01k05n01-ripple-white);
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.b2s01k05n01-ripple-tool-box h3 {
    text-align: center;
    margin-bottom: 24px;
    color: var(--b2s01k05n01-ripple-dark);
}

.b2s01k05n01-ripple-form-group {
    margin-bottom: 16px;
}

.b2s01k05n01-ripple-form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 14px;
}

.b2s01k05n01-ripple-form-group select,
.b2s01k05n01-ripple-form-group input,
.b2s01k05n01-ripple-form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--b2s01k05n01-ripple-border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.b2s01k05n01-ripple-form-group select:focus,
.b2s01k05n01-ripple-form-group input:focus,
.b2s01k05n01-ripple-form-group textarea:focus {
    outline: none;
    border-color: var(--b2s01k05n01-ripple-primary);
}

.b2s01k05n01-ripple-result-box {
    margin-top: 20px;
    padding: 16px;
    background: var(--b2s01k05n01-ripple-light);
    border-radius: 8px;
    min-height: 60px;
    font-size: 14px;
}

/* ===== FAQ区 ===== */
.b2s01k05n01-ripple-faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.b2s01k05n01-ripple-faq-item {
    background: var(--b2s01k05n01-ripple-white);
    border-radius: 8px;
    margin-bottom: 12px;
    overflow: hidden;
    border: 1px solid var(--b2s01k05n01-ripple-border);
}

.b2s01k05n01-ripple-faq-question {
    padding: 18px 24px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.b2s01k05n01-ripple-faq-question::after {
    content: '+';
    font-size: 20px;
    color: var(--b2s01k05n01-ripple-primary);
}

.b2s01k05n01-ripple-faq-answer {
    padding: 0 24px 18px;
    font-size: 14px;
    color: var(--b2s01k05n01-ripple-gray);
    line-height: 1.8;
}

/* ===== 商业信任区 ===== */
.b2s01k05n01-ripple-trust-section {
    background: var(--b2s01k05n01-ripple-white);
    border-top: 1px solid var(--b2s01k05n01-ripple-border);
}

.b2s01k05n01-ripple-trust-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.b2s01k05n01-ripple-trust-item {
    text-align: center;
    padding: 20px;
}

.b2s01k05n01-ripple-trust-number {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--b2s01k05n01-ripple-primary);
}

.b2s01k05n01-ripple-trust-label {
    font-size: 14px;
    color: var(--b2s01k05n01-ripple-gray);
    margin-top: 4px;
}

/* ===== 面包屑 ===== */
.b2s01k05n01-ripple-breadcrumb {
    padding: 16px 0;
    font-size: 14px;
    color: var(--b2s01k05n01-ripple-gray);
}

.b2s01k05n01-ripple-breadcrumb a {
    color: var(--b2s01k05n01-ripple-gray);
}

.b2s01k05n01-ripple-breadcrumb a:hover {
    color: var(--b2s01k05n01-ripple-primary);
}

.b2s01k05n01-ripple-breadcrumb span {
    margin: 0 8px;
}

/* ===== 页脚 ===== */
.b2s01k05n01-ripple-footer {
    background: var(--b2s01k05n01-ripple-dark);
    color: rgba(255,255,255,0.8);
    padding: 50px 0 0;
}

.b2s01k05n01-ripple-footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.b2s01k05n01-ripple-footer-col h4 {
    color: var(--b2s01k05n01-ripple-white);
    font-size: 16px;
    margin-bottom: 16px;
}

.b2s01k05n01-ripple-footer-col ul {
    list-style: none;
}

.b2s01k05n01-ripple-footer-col ul li {
    margin-bottom: 8px;
}

.b2s01k05n01-ripple-footer-col ul li a {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    transition: color 0.3s;
}

.b2s01k05n01-ripple-footer-col ul li a:hover {
    color: var(--b2s01k05n01-ripple-secondary);
}

.b2s01k05n01-ripple-footer-col p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255,255,255,0.7);
}

.b2s01k05n01-ripple-footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

.b2s01k05n01-ripple-footer-social {
    display: flex;
    gap: 16px;
    margin-top: 12px;
}

.b2s01k05n01-ripple-footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    transition: background 0.3s;
}

.b2s01k05n01-ripple-footer-social a:hover {
    background: var(--b2s01k05n01-ripple-secondary);
    color: var(--b2s01k05n01-ripple-white);
}

/* ===== 文章详情页 ===== */
.b2s01k05n01-ripple-article-block {
    background: var(--b2s01k05n01-ripple-white);
    border-radius: 10px;
    padding: 40px;
    margin: 30px 0;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.b2s01k05n01-ripple-article-block h1 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: var(--b2s01k05n01-ripple-dark);
}

.b2s01k05n01-ripple-article-meta {
    display: flex;
    gap: 20px;
    font-size: 14px;
    color: var(--b2s01k05n01-ripple-gray);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--b2s01k05n01-ripple-border);
}

.b2s01k05n01-ripple-article-content {
    font-size: 15px;
    line-height: 2;
}

.b2s01k05n01-ripple-article-content h2 {
    font-size: 1.4rem;
    margin: 28px 0 12px;
    color: var(--b2s01k05n01-ripple-dark);
}

.b2s01k05n01-ripple-article-content h3 {
    font-size: 1.2rem;
    margin: 20px 0 10px;
    color: var(--b2s01k05n01-ripple-dark);
}

.b2s01k05n01-ripple-article-content p {
    margin-bottom: 16px;
}

.b2s01k05n01-ripple-article-content img {
    border-radius: 8px;
    margin: 20px 0;
}

/* ===== 相关推荐 ===== */
.b2s01k05n01-ripple-related {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--b2s01k05n01-ripple-border);
}

.b2s01k05n01-ripple-related h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.b2s01k05n01-ripple-related ul {
    list-style: none;
}

.b2s01k05n01-ripple-related ul li {
    padding: 8px 0;
    border-bottom: 1px solid var(--b2s01k05n01-ripple-border);
}

.b2s01k05n01-ripple-related ul li:last-child {
    border-bottom: none;
}

/* ===== 侧边栏 ===== */
.b2s01k05n01-ripple-sidebar {
    position: sticky;
    top: 20px;
}

.b2s01k05n01-ripple-sidebar-widget {
    background: var(--b2s01k05n01-ripple-white);
    border-radius: 10px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.b2s01k05n01-ripple-sidebar-widget h4 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--b2s01k05n01-ripple-dark);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--b2s01k05n01-ripple-secondary);
}

/* ===== 列表页 ===== */
.b2s01k05n01-ripple-list-page {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
    padding: 30px 0;
}

/* ===== 时间轴 ===== */
.b2s01k05n01-ripple-timeline {
    position: relative;
    padding-left: 30px;
}

.b2s01k05n01-ripple-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--b2s01k05n01-ripple-border);
}

.b2s01k05n01-ripple-timeline-item {
    position: relative;
    margin-bottom: 30px;
    padding-left: 20px;
}

.b2s01k05n01-ripple-timeline-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--b2s01k05n01-ripple-primary);
    border: 2px solid var(--b2s01k05n01-ripple-white);
}

.b2s01k05n01-ripple-timeline-year {
    font-weight: 700;
    color: var(--b2s01k05n01-ripple-primary);
    margin-bottom: 4px;
}

/* ===== 页面标题区 ===== */
.b2s01k05n01-ripple-page-hero {
    background: linear-gradient(135deg, var(--b2s01k05n01-ripple-dark) 0%, var(--b2s01k05n01-ripple-primary) 100%);
    padding: 60px 0;
    text-align: center;
    color: var(--b2s01k05n01-ripple-white);
}

.b2s01k05n01-ripple-page-hero h1 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.b2s01k05n01-ripple-page-hero p {
    font-size: 15px;
    opacity: 0.85;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
    .b2s01k05n01-ripple-grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .b2s01k05n01-ripple-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .b2s01k05n01-ripple-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .b2s01k05n01-ripple-footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .b2s01k05n01-ripple-list-page {
        grid-template-columns: 1fr;
    }
    .b2s01k05n01-ripple-banner {
        height: 400px;
    }
    .b2s01k05n01-ripple-banner-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .b2s01k05n01-ripple-nav-list {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--b2s01k05n01-ripple-white);
        flex-direction: column;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        z-index: 1000;
    }
    .b2s01k05n01-ripple-nav-list.active {
        display: flex;
    }
    .b2s01k05n01-ripple-mobile-toggle {
        display: block;
    }
    .b2s01k05n01-ripple-link-element {
        padding: 14px 20px;
    }
    .b2s01k05n01-ripple-grid-3,
    .b2s01k05n01-ripple-grid-2 {
        grid-template-columns: 1fr;
    }
    .b2s01k05n01-ripple-footer-grid {
        grid-template-columns: 1fr;
    }
    .b2s01k05n01-ripple-banner {
        height: 320px;
    }
    .b2s01k05n01-ripple-banner-title {
        font-size: 1.6rem;
    }
    .b2s01k05n01-ripple-article-block {
        padding: 20px;
    }
    .b2s01k05n01-ripple-section {
        padding: 40px 0;
    }
}

@media (max-width: 480px) {
    .b2s01k05n01-ripple-grid-4 {
        grid-template-columns: 1fr;
    }
    .b2s01k05n01-ripple-banner {
        height: 260px;
    }
    .b2s01k05n01-ripple-banner-title {
        font-size: 1.3rem;
    }
    .b2s01k05n01-ripple-section-title {
        font-size: 1.4rem;
    }
    .b2s01k05n01-ripple-tool-box {
        padding: 20px;
    }
}