/* ============================================
   信息来源透明度观察站 - 主样式表
   前缀: b2s01k01n04-ripple-
   风格: 服务型霓虹边框点缀，语气潮流先锋
   ============================================ */

/* CSS Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --b2s01k01n04-ripple-primary: #0a1628;
    --b2s01k01n04-ripple-secondary: #1a2a4a;
    --b2s01k01n04-ripple-accent: #00e5ff;
    --b2s01k01n04-ripple-neon-pink: #ff0080;
    --b2s01k01n04-ripple-neon-purple: #7b2ff7;
    --b2s01k01n04-ripple-neon-green: #39ff14;
    --b2s01k01n04-ripple-text: #e8eaf6;
    --b2s01k01n04-ripple-text-muted: #90a4ae;
    --b2s01k01n04-ripple-bg-card: rgba(26, 42, 74, 0.85);
    --b2s01k01n04-ripple-border-glow: 0 0 8px rgba(0, 229, 255, 0.4);
    --b2s01k01n04-ripple-font-main: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --b2s01k01n04-ripple-radius: 12px;
    --b2s01k01n04-ripple-transition: all 0.3s ease;
}

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

body {
    font-family: var(--b2s01k01n04-ripple-font-main);
    background-color: var(--b2s01k01n04-ripple-primary);
    color: var(--b2s01k01n04-ripple-text);
    line-height: 1.8;
    overflow-x: hidden;
}

a {
    color: var(--b2s01k01n04-ripple-accent);
    text-decoration: none;
    transition: var(--b2s01k01n04-ripple-transition);
}

a:hover {
    color: var(--b2s01k01n04-ripple-neon-pink);
    text-shadow: 0 0 8px rgba(255, 0, 128, 0.5);
}

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

/* ============ Header & Navigation ============ */
.b2s01k01n04-ripple-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 229, 255, 0.2);
    padding: 0 2rem;
}

.b2s01k01n04-ripple-header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.b2s01k01n04-ripple-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.b2s01k01n04-ripple-logo img {
    height: 40px;
    width: auto;
}

.b2s01k01n04-ripple-nav-list {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.b2s01k01n04-ripple-nav-item {
    position: relative;
}

.b2s01k01n04-ripple-link-element {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--b2s01k01n04-ripple-text);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 6px;
    transition: var(--b2s01k01n04-ripple-transition);
}

.b2s01k01n04-ripple-link-element:hover,
.b2s01k01n04-ripple-link-element.active {
    color: var(--b2s01k01n04-ripple-accent);
    background: rgba(0, 229, 255, 0.08);
    box-shadow: inset 0 0 0 1px rgba(0, 229, 255, 0.3);
}

.b2s01k01n04-ripple-mobile-toggle {
    display: none;
    background: none;
    border: 1px solid var(--b2s01k01n04-ripple-accent);
    color: var(--b2s01k01n04-ripple-accent);
    padding: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.2rem;
}

/* ============ Hero / Banner ============ */
.b2s01k01n04-ripple-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 2rem 80px;
    overflow: hidden;
}

.b2s01k01n04-ripple-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../images/hero-banner.webp') center/cover no-repeat;
    opacity: 0.3;
    z-index: 0;
}

.b2s01k01n04-ripple-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10,22,40,0.7) 0%, rgba(10,22,40,0.95) 100%);
    z-index: 1;
}

.b2s01k01n04-ripple-hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.b2s01k01n04-ripple-hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--b2s01k01n04-ripple-accent), var(--b2s01k01n04-ripple-neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.b2s01k01n04-ripple-hero-content p {
    font-size: 1.2rem;
    color: var(--b2s01k01n04-ripple-text-muted);
    margin-bottom: 2rem;
    line-height: 1.9;
}

.b2s01k01n04-ripple-cta-btn {
    display: inline-block;
    padding: 0.9rem 2.5rem;
    background: linear-gradient(135deg, var(--b2s01k01n04-ripple-accent), var(--b2s01k01n04-ripple-neon-purple));
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: var(--b2s01k01n04-ripple-transition);
    box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
}

.b2s01k01n04-ripple-cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 229, 255, 0.5);
    color: #fff;
}

.b2s01k01n04-ripple-cta-btn-outline {
    display: inline-block;
    padding: 0.9rem 2.5rem;
    background: transparent;
    color: var(--b2s01k01n04-ripple-accent);
    font-weight: 600;
    font-size: 1rem;
    border-radius: 50px;
    border: 2px solid var(--b2s01k01n04-ripple-accent);
    cursor: pointer;
    transition: var(--b2s01k01n04-ripple-transition);
    margin-left: 1rem;
}

.b2s01k01n04-ripple-cta-btn-outline:hover {
    background: rgba(0, 229, 255, 0.1);
    color: var(--b2s01k01n04-ripple-accent);
}

/* ============ Sections ============ */
.b2s01k01n04-ripple-section {
    padding: 80px 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.b2s01k01n04-ripple-section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--b2s01k01n04-ripple-text);
}

.b2s01k01n04-ripple-section-subtitle {
    text-align: center;
    color: var(--b2s01k01n04-ripple-text-muted);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ============ Cards Grid ============ */
.b2s01k01n04-ripple-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.b2s01k01n04-ripple-card {
    background: var(--b2s01k01n04-ripple-bg-card);
    border-radius: var(--b2s01k01n04-ripple-radius);
    border: 1px solid rgba(0, 229, 255, 0.15);
    padding: 2rem;
    transition: var(--b2s01k01n04-ripple-transition);
    position: relative;
    overflow: hidden;
}

.b2s01k01n04-ripple-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--b2s01k01n04-ripple-accent), var(--b2s01k01n04-ripple-neon-purple));
    opacity: 0;
    transition: var(--b2s01k01n04-ripple-transition);
}

.b2s01k01n04-ripple-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 229, 255, 0.4);
    box-shadow: var(--b2s01k01n04-ripple-border-glow);
}

.b2s01k01n04-ripple-card:hover::before {
    opacity: 1;
}

.b2s01k01n04-ripple-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
    color: var(--b2s01k01n04-ripple-text);
}

.b2s01k01n04-ripple-card p {
    color: var(--b2s01k01n04-ripple-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

.b2s01k01n04-ripple-card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(0, 229, 255, 0.1);
    color: var(--b2s01k01n04-ripple-accent);
    font-size: 1.5rem;
}

/* ============ News / Articles ============ */
.b2s01k01n04-ripple-article-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.b2s01k01n04-ripple-article-block {
    background: var(--b2s01k01n04-ripple-bg-card);
    border-radius: var(--b2s01k01n04-ripple-radius);
    border: 1px solid rgba(0, 229, 255, 0.1);
    padding: 1.5rem;
    transition: var(--b2s01k01n04-ripple-transition);
}

.b2s01k01n04-ripple-article-block:hover {
    border-color: rgba(0, 229, 255, 0.3);
    box-shadow: var(--b2s01k01n04-ripple-border-glow);
}

.b2s01k01n04-ripple-article-block h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.b2s01k01n04-ripple-article-block h4 a {
    color: var(--b2s01k01n04-ripple-text);
}

.b2s01k01n04-ripple-article-block h4 a:hover {
    color: var(--b2s01k01n04-ripple-accent);
}

.b2s01k01n04-ripple-article-meta {
    font-size: 0.85rem;
    color: var(--b2s01k01n04-ripple-text-muted);
    margin-bottom: 0.8rem;
}

.b2s01k01n04-ripple-article-meta span {
    margin-right: 1rem;
}

/* ============ FAQ ============ */
.b2s01k01n04-ripple-faq-item {
    background: var(--b2s01k01n04-ripple-bg-card);
    border: 1px solid rgba(0, 229, 255, 0.1);
    border-radius: var(--b2s01k01n04-ripple-radius);
    margin-bottom: 1rem;
    padding: 1.5rem;
    transition: var(--b2s01k01n04-ripple-transition);
}

.b2s01k01n04-ripple-faq-item:hover {
    border-color: rgba(0, 229, 255, 0.3);
}

.b2s01k01n04-ripple-faq-item h4 {
    font-size: 1.05rem;
    margin-bottom: 0.8rem;
    color: var(--b2s01k01n04-ripple-accent);
}

.b2s01k01n04-ripple-faq-item p {
    color: var(--b2s01k01n04-ripple-text-muted);
    line-height: 1.8;
}

/* ============ Video Section ============ */
.b2s01k01n04-ripple-video-wrapper {
    max-width: 800px;
    margin: 0 auto;
    border-radius: var(--b2s01k01n04-ripple-radius);
    overflow: hidden;
    border: 1px solid rgba(0, 229, 255, 0.2);
    box-shadow: var(--b2s01k01n04-ripple-border-glow);
}

.b2s01k01n04-ripple-video-wrapper video {
    width: 100%;
    display: block;
}

/* ============ Interactive Tool ============ */
.b2s01k01n04-ripple-tool-panel {
    background: var(--b2s01k01n04-ripple-bg-card);
    border: 1px solid rgba(0, 229, 255, 0.2);
    border-radius: var(--b2s01k01n04-ripple-radius);
    padding: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.b2s01k01n04-ripple-tool-panel h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--b2s01k01n04-ripple-accent);
}

.b2s01k01n04-ripple-tool-input {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.b2s01k01n04-ripple-tool-input input {
    flex: 1;
    min-width: 200px;
    padding: 0.8rem 1.2rem;
    background: rgba(10, 22, 40, 0.8);
    border: 1px solid rgba(0, 229, 255, 0.3);
    border-radius: 8px;
    color: var(--b2s01k01n04-ripple-text);
    font-size: 0.95rem;
}

.b2s01k01n04-ripple-tool-input input:focus {
    outline: none;
    border-color: var(--b2s01k01n04-ripple-accent);
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.2);
}

.b2s01k01n04-ripple-tool-result {
    background: rgba(10, 22, 40, 0.6);
    border-radius: 8px;
    padding: 1.5rem;
    min-height: 100px;
}

/* ============ Trust / Badges ============ */
.b2s01k01n04-ripple-trust-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    padding: 2rem;
}

.b2s01k01n04-ripple-trust-item {
    text-align: center;
}

.b2s01k01n04-ripple-trust-item .number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--b2s01k01n04-ripple-accent);
}

.b2s01k01n04-ripple-trust-item .label {
    font-size: 0.9rem;
    color: var(--b2s01k01n04-ripple-text-muted);
    margin-top: 0.3rem;
}

/* ============ Footer ============ */
.b2s01k01n04-ripple-footer {
    background: rgba(5, 12, 25, 0.98);
    border-top: 1px solid rgba(0, 229, 255, 0.15);
    padding: 60px 2rem 30px;
}

.b2s01k01n04-ripple-footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.b2s01k01n04-ripple-footer-col h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--b2s01k01n04-ripple-text);
    border-bottom: 2px solid var(--b2s01k01n04-ripple-accent);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.b2s01k01n04-ripple-footer-col ul {
    list-style: none;
}

.b2s01k01n04-ripple-footer-col ul li {
    margin-bottom: 0.5rem;
}

.b2s01k01n04-ripple-footer-col ul li a {
    color: var(--b2s01k01n04-ripple-text-muted);
    font-size: 0.9rem;
}

.b2s01k01n04-ripple-footer-col ul li a:hover {
    color: var(--b2s01k01n04-ripple-accent);
}

.b2s01k01n04-ripple-footer-col p {
    color: var(--b2s01k01n04-ripple-text-muted);
    font-size: 0.9rem;
    line-height: 1.8;
}

.b2s01k01n04-ripple-footer-bottom {
    max-width: 1400px;
    margin: 2rem auto 0;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(0, 229, 255, 0.1);
    text-align: center;
    color: var(--b2s01k01n04-ripple-text-muted);
    font-size: 0.85rem;
}

.b2s01k01n04-ripple-footer-bottom a {
    color: var(--b2s01k01n04-ripple-text-muted);
    margin: 0 0.5rem;
}

.b2s01k01n04-ripple-social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.b2s01k01n04-ripple-social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(0, 229, 255, 0.3);
    color: var(--b2s01k01n04-ripple-accent);
    font-size: 0.9rem;
    transition: var(--b2s01k01n04-ripple-transition);
}

.b2s01k01n04-ripple-social-links a:hover {
    background: rgba(0, 229, 255, 0.1);
    border-color: var(--b2s01k01n04-ripple-accent);
}

/* ============ Breadcrumb ============ */
.b2s01k01n04-ripple-breadcrumb {
    padding: 100px 2rem 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.b2s01k01n04-ripple-breadcrumb ol {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.b2s01k01n04-ripple-breadcrumb ol li::after {
    content: '>';
    margin-left: 0.5rem;
    color: var(--b2s01k01n04-ripple-text-muted);
}

.b2s01k01n04-ripple-breadcrumb ol li:last-child::after {
    content: '';
}

.b2s01k01n04-ripple-breadcrumb ol li a {
    color: var(--b2s01k01n04-ripple-text-muted);
}

.b2s01k01n04-ripple-breadcrumb ol li:last-child a {
    color: var(--b2s01k01n04-ripple-accent);
}

/* ============ Page Header ============ */
.b2s01k01n04-ripple-page-header {
    background: linear-gradient(135deg, var(--b2s01k01n04-ripple-secondary), var(--b2s01k01n04-ripple-primary));
    padding: 40px 2rem;
    text-align: center;
    border-bottom: 1px solid rgba(0, 229, 255, 0.15);
}

.b2s01k01n04-ripple-page-header h1 {
    font-size: 2.2rem;
    margin-bottom: 0.8rem;
    color: var(--b2s01k01n04-ripple-text);
}

.b2s01k01n04-ripple-page-header p {
    color: var(--b2s01k01n04-ripple-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ============ Form ============ */
.b2s01k01n04-ripple-form {
    max-width: 700px;
    margin: 0 auto;
}

.b2s01k01n04-ripple-form-group {
    margin-bottom: 1.5rem;
}

.b2s01k01n04-ripple-form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--b2s01k01n04-ripple-text);
    font-weight: 500;
}

.b2s01k01n04-ripple-form-group input,
.b2s01k01n04-ripple-form-group textarea,
.b2s01k01n04-ripple-form-group select {
    width: 100%;
    padding: 0.8rem 1.2rem;
    background: rgba(10, 22, 40, 0.8);
    border: 1px solid rgba(0, 229, 255, 0.3);
    border-radius: 8px;
    color: var(--b2s01k01n04-ripple-text);
    font-size: 0.95rem;
    font-family: inherit;
}

.b2s01k01n04-ripple-form-group input:focus,
.b2s01k01n04-ripple-form-group textarea:focus {
    outline: none;
    border-color: var(--b2s01k01n04-ripple-accent);
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.2);
}

.b2s01k01n04-ripple-form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* ============ Timeline ============ */
.b2s01k01n04-ripple-timeline {
    position: relative;
    padding-left: 2rem;
    border-left: 2px solid rgba(0, 229, 255, 0.3);
}

.b2s01k01n04-ripple-timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.b2s01k01n04-ripple-timeline-item::before {
    content: '';
    position: absolute;
    left: -2.55rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--b2s01k01n04-ripple-accent);
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
}

.b2s01k01n04-ripple-timeline-item h4 {
    color: var(--b2s01k01n04-ripple-accent);
    margin-bottom: 0.3rem;
}

.b2s01k01n04-ripple-timeline-item p {
    color: var(--b2s01k01n04-ripple-text-muted);
}

/* ============ Responsive ============ */
@media (max-width: 1200px) {
    .b2s01k01n04-ripple-hero-content h1 {
        font-size: 2.5rem;
    }
    .b2s01k01n04-ripple-footer-inner {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .b2s01k01n04-ripple-nav-list {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 22, 40, 0.98);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid rgba(0, 229, 255, 0.2);
    }
    .b2s01k01n04-ripple-nav-list.active {
        display: flex;
    }
    .b2s01k01n04-ripple-mobile-toggle {
        display: block;
    }
    .b2s01k01n04-ripple-hero-content h1 {
        font-size: 2rem;
    }
    .b2s01k01n04-ripple-section {
        padding: 60px 1.5rem;
    }
}

@media (max-width: 768px) {
    .b2s01k01n04-ripple-footer-inner {
        grid-template-columns: 1fr;
    }
    .b2s01k01n04-ripple-grid {
        grid-template-columns: 1fr;
    }
    .b2s01k01n04-ripple-article-list {
        grid-template-columns: 1fr;
    }
    .b2s01k01n04-ripple-hero-content h1 {
        font-size: 1.8rem;
    }
    .b2s01k01n04-ripple-section-title {
        font-size: 1.6rem;
    }
    .b2s01k01n04-ripple-trust-bar {
        gap: 1.5rem;
    }
    .b2s01k01n04-ripple-cta-btn-outline {
        margin-left: 0;
        margin-top: 1rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    .b2s01k01n04-ripple-hero {
        padding: 100px 1rem 60px;
    }
    .b2s01k01n04-ripple-section {
        padding: 40px 1rem;
    }
    .b2s01k01n04-ripple-card {
        padding: 1.5rem;
    }
}

/* ============ Utility ============ */
.b2s01k01n04-ripple-neon-border {
    border: 1px solid rgba(0, 229, 255, 0.3);
    box-shadow: var(--b2s01k01n04-ripple-border-glow);
}

.b2s01k01n04-ripple-text-gradient {
    background: linear-gradient(135deg, var(--b2s01k01n04-ripple-accent), var(--b2s01k01n04-ripple-neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.b2s01k01n04-ripple-badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(0, 229, 255, 0.1);
    border: 1px solid rgba(0, 229, 255, 0.3);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--b2s01k01n04-ripple-accent);
}

/* Image card with overlay */
.b2s01k01n04-ripple-img-card {
    position: relative;
    border-radius: var(--b2s01k01n04-ripple-radius);
    overflow: hidden;
    border: 1px solid rgba(0, 229, 255, 0.15);
}

.b2s01k01n04-ripple-img-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: var(--b2s01k01n04-ripple-transition);
}

.b2s01k01n04-ripple-img-card:hover img {
    transform: scale(1.05);
}

.b2s01k01n04-ripple-img-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    background: linear-gradient(transparent, rgba(10, 22, 40, 0.95));
}

.b2s01k01n04-ripple-img-card-overlay h4 {
    color: var(--b2s01k01n04-ripple-text);
    font-size: 1rem;
}