/* ============================================================
   短内容打卡竞赛中心 - 全站样式
   风格：杂志化霓虹边框点缀，语气创作者友好，强调第3屏差异化转化
   前缀：b2s01k05n04-studio-
   ============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.75;
    color: #1a1a2e;
    background: #fafafa;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: #6c63ff; text-decoration: none; transition: color .2s; }
a:hover { color: #ff6ec7; }
ul, ol { list-style: none; }

/* --- Neon Accent Variables --- */
:root {
    --neon-purple: #a855f7;
    --neon-pink: #ec4899;
    --neon-cyan: #06b6d4;
    --neon-green: #10b981;
    --dark-bg: #0f0f23;
    --card-bg: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #8888aa;
    --border-light: #e8e8f0;
    --glow-purple: 0 0 20px rgba(168, 85, 247, 0.3);
    --glow-pink: 0 0 20px rgba(236, 72, 153, 0.3);
    --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.3);
}

/* --- Layout --- */
.b2s01k05n04-studio-container-wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* --- Header / Navigation --- */
.b2s01k05n04-studio-header {
    background: rgba(15, 15, 35, 0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(168, 85, 247, 0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0.75rem 0;
}
.b2s01k05n04-studio-header .b2s01k05n04-studio-container-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.b2s01k05n04-studio-logo {
    height: 40px;
    width: auto;
}
.b2s01k05n04-studio-nav-list {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}
.b2s01k05n04-studio-nav-item { position: relative; }
.b2s01k05n04-studio-link-element {
    color: #e0e0f0;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.5rem 0;
    transition: color .2s;
}
.b2s01k05n04-studio-link-element:hover,
.b2s01k05n04-studio-link-element.active {
    color: var(--neon-purple);
}
.b2s01k05n04-studio-link-element.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-purple), var(--neon-pink));
    border-radius: 2px;
}

/* Mobile Nav Toggle */
.b2s01k05n04-studio-nav-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- Hero / Banner --- */
.b2s01k05n04-studio-hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--dark-bg);
}
.b2s01k05n04-studio-hero-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}
.b2s01k05n04-studio-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,15,35,0.85) 0%, rgba(15,15,35,0.4) 100%);
}
.b2s01k05n04-studio-hero-content {
    position: relative;
    z-index: 2;
    padding: 4rem 0;
    max-width: 680px;
}
.b2s01k05n04-studio-hero-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1rem;
    line-height: 1.3;
}
.b2s01k05n04-studio-hero-content p {
    font-size: 1.1rem;
    color: #c8c8e0;
    margin-bottom: 2rem;
    line-height: 1.8;
}
.b2s01k05n04-studio-cta-btn {
    display: inline-block;
    padding: 0.85rem 2rem;
    background: linear-gradient(135deg, var(--neon-purple), var(--neon-pink));
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: transform .2s, box-shadow .2s;
    text-decoration: none;
}
.b2s01k05n04-studio-cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-purple);
    color: #fff;
}

/* --- Section Common --- */
.b2s01k05n04-studio-section {
    padding: 4rem 0;
}
.b2s01k05n04-studio-section-dark {
    background: var(--dark-bg);
    color: #e0e0f0;
}
.b2s01k05n04-studio-section-alt {
    background: #f4f2ff;
}
.b2s01k05n04-studio-section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}
.b2s01k05n04-studio-section-dark .b2s01k05n04-studio-section-title {
    color: #ffffff;
}
.b2s01k05n04-studio-section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}
.b2s01k05n04-studio-section-dark .b2s01k05n04-studio-section-subtitle {
    color: #a0a0c0;
}

/* --- Card Grid --- */
.b2s01k05n04-studio-grid {
    display: grid;
    gap: 1.5rem;
}
.b2s01k05n04-studio-grid-2 { grid-template-columns: repeat(2, 1fr); }
.b2s01k05n04-studio-grid-3 { grid-template-columns: repeat(3, 1fr); }
.b2s01k05n04-studio-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* --- Card --- */
.b2s01k05n04-studio-card {
    background: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: transform .25s, box-shadow .25s;
}
.b2s01k05n04-studio-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(168, 85, 247, 0.12);
}
.b2s01k05n04-studio-card-neon {
    border: 1px solid rgba(168, 85, 247, 0.4);
    box-shadow: inset 0 0 0 1px rgba(168, 85, 247, 0.1);
}
.b2s01k05n04-studio-card-neon:hover {
    border-color: var(--neon-purple);
    box-shadow: var(--glow-purple);
}
.b2s01k05n04-studio-card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}
.b2s01k05n04-studio-card-body {
    padding: 1.25rem;
}
.b2s01k05n04-studio-card-body h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}
.b2s01k05n04-studio-card-body p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}
.b2s01k05n04-studio-card-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
}

/* --- Neon Border Accent --- */
.b2s01k05n04-studio-neon-border {
    border-left: 3px solid var(--neon-purple);
    padding-left: 1rem;
}
.b2s01k05n04-studio-neon-border-pink {
    border-left: 3px solid var(--neon-pink);
    padding-left: 1rem;
}
.b2s01k05n04-studio-neon-border-cyan {
    border-left: 3px solid var(--neon-cyan);
    padding-left: 1rem;
}

/* --- Features / Advantages --- */
.b2s01k05n04-studio-feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, rgba(168,85,247,0.1), rgba(236,72,153,0.1));
    border: 1px solid rgba(168,85,247,0.3);
}

/* --- FAQ --- */
.b2s01k05n04-studio-faq-item {
    border-bottom: 1px solid var(--border-light);
    padding: 1.25rem 0;
}
.b2s01k05n04-studio-faq-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    cursor: pointer;
}
.b2s01k05n04-studio-faq-item p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Breadcrumb --- */
.b2s01k05n04-studio-breadcrumb {
    padding: 1rem 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.b2s01k05n04-studio-breadcrumb a {
    color: var(--text-secondary);
}
.b2s01k05n04-studio-breadcrumb span { margin: 0 0.4rem; }

/* --- Footer --- */
.b2s01k05n04-studio-footer {
    background: var(--dark-bg);
    color: #c0c0d8;
    padding: 3rem 0 1.5rem;
    border-top: 1px solid rgba(168, 85, 247, 0.3);
}
.b2s01k05n04-studio-footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}
.b2s01k05n04-studio-footer h4 {
    color: #ffffff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}
.b2s01k05n04-studio-footer ul li {
    margin-bottom: 0.5rem;
}
.b2s01k05n04-studio-footer ul li a {
    color: #a0a0c0;
    font-size: 0.88rem;
    transition: color .2s;
}
.b2s01k05n04-studio-footer ul li a:hover {
    color: var(--neon-purple);
}
.b2s01k05n04-studio-footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.82rem;
    color: #8080a0;
}
.b2s01k05n04-studio-footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 0.75rem;
}
.b2s01k05n04-studio-footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(168, 85, 247, 0.15);
    color: var(--neon-purple);
    font-size: 0.9rem;
    transition: background .2s;
}
.b2s01k05n04-studio-footer-social a:hover {
    background: var(--neon-purple);
    color: #fff;
}

/* --- Interactive Tool --- */
.b2s01k05n04-studio-tool-box {
    background: linear-gradient(135deg, #1a1a3e, #2a1a4e);
    border: 1px solid rgba(168, 85, 247, 0.4);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--glow-purple);
}
.b2s01k05n04-studio-tool-box h3 {
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}
.b2s01k05n04-studio-tool-box label {
    color: #c0c0e0;
    font-size: 0.9rem;
    display: block;
    margin-bottom: 0.5rem;
}
.b2s01k05n04-studio-tool-box select,
.b2s01k05n04-studio-tool-box input[type="text"] {
    width: 100%;
    padding: 0.7rem 1rem;
    border-radius: 6px;
    border: 1px solid rgba(168, 85, 247, 0.4);
    background: rgba(255,255,255,0.05);
    color: #e0e0f0;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}
.b2s01k05n04-studio-tool-box button {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--neon-purple), var(--neon-pink));
    border: none;
    color: #fff;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: transform .2s;
}
.b2s01k05n04-studio-tool-box button:hover {
    transform: scale(1.03);
}
.b2s01k05n04-studio-tool-result {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 8px;
    color: var(--neon-green);
    display: none;
}

/* --- Video Section --- */
.b2s01k05n04-studio-video-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(168, 85, 247, 0.3);
    box-shadow: var(--glow-purple);
}
.b2s01k05n04-studio-video-wrapper video {
    width: 100%;
    display: block;
}

/* --- Trust Badges --- */
.b2s01k05n04-studio-trust-row {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}
.b2s01k05n04-studio-trust-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    background: #fff;
}

/* --- Page Title Banner (Inner Pages) --- */
.b2s01k05n04-studio-page-banner {
    background: var(--dark-bg);
    padding: 3rem 0;
    text-align: center;
    border-bottom: 1px solid rgba(168, 85, 247, 0.3);
}
.b2s01k05n04-studio-page-banner h1 {
    font-size: 2rem;
    color: #fff;
    font-weight: 700;
}
.b2s01k05n04-studio-page-banner p {
    color: #a0a0c0;
    margin-top: 0.5rem;
}

/* --- Article Content --- */
.b2s01k05n04-studio-article-block {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 0;
}
.b2s01k05n04-studio-article-block h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 2rem 0 1rem;
    color: var(--text-primary);
}
.b2s01k05n04-studio-article-block h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem;
}
.b2s01k05n04-studio-article-block p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}
.b2s01k05n04-studio-article-block blockquote {
    border-left: 4px solid var(--neon-purple);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    background: #f8f6ff;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: var(--text-secondary);
}

/* --- Timeline --- */
.b2s01k05n04-studio-timeline {
    position: relative;
    padding-left: 2rem;
}
.b2s01k05n04-studio-timeline::before {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--neon-purple), var(--neon-cyan));
}
.b2s01k05n04-studio-timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}
.b2s01k05n04-studio-timeline-item::before {
    content: '';
    position: absolute;
    left: -1.6rem;
    top: 0.4rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--neon-purple);
    border: 2px solid #fff;
    box-shadow: var(--glow-purple);
}
.b2s01k05n04-studio-timeline-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}
.b2s01k05n04-studio-timeline-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* --- Team --- */
.b2s01k05n04-studio-team-card {
    text-align: center;
    padding: 1.5rem;
}
.b2s01k05n04-studio-team-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--neon-purple), var(--neon-pink));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
    font-weight: 700;
}
.b2s01k05n04-studio-team-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}
.b2s01k05n04-studio-team-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Form --- */
.b2s01k05n04-studio-form-group {
    margin-bottom: 1.25rem;
}
.b2s01k05n04-studio-form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}
.b2s01k05n04-studio-form-group input,
.b2s01k05n04-studio-form-group textarea,
.b2s01k05n04-studio-form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    font-size: 0.95rem;
    transition: border-color .2s;
}
.b2s01k05n04-studio-form-group input:focus,
.b2s01k05n04-studio-form-group textarea:focus {
    outline: none;
    border-color: var(--neon-purple);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.1);
}

/* --- Responsive --- */
@media (max-width: 1200px) {
    .b2s01k05n04-studio-grid-4 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 992px) {
    .b2s01k05n04-studio-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .b2s01k05n04-studio-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .b2s01k05n04-studio-footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .b2s01k05n04-studio-nav-list { display: none; }
    .b2s01k05n04-studio-nav-toggle { display: block; }
    .b2s01k05n04-studio-nav-list.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(15, 15, 35, 0.98);
        padding: 1rem;
        gap: 0.5rem;
        border-bottom: 1px solid rgba(168, 85, 247, 0.3);
    }
    .b2s01k05n04-studio-grid-2,
    .b2s01k05n04-studio-grid-3,
    .b2s01k05n04-studio-grid-4 { grid-template-columns: 1fr; }
    .b2s01k05n04-studio-hero-content h1 { font-size: 1.75rem; }
    .b2s01k05n04-studio-footer-grid { grid-template-columns: 1fr; }
    .b2s01k05n04-studio-hero { min-height: 400px; }
}
@media (max-width: 480px) {
    .b2s01k05n04-studio-container-wrapper { padding: 0 0.75rem; }
    .b2s01k05n04-studio-section { padding: 2.5rem 0; }
    .b2s01k05n04-studio-hero-content h1 { font-size: 1.5rem; }
}