/* 全新设计系统 - 糖心vlog */
:root {
    --color-primary: #ff6b95;
    --color-primary-light: #ff8fab;
    --color-primary-dark: #e55a81;
    --color-secondary: #ffb3d1;
    --color-accent: #ffe8f0;
    --color-text-main: #1a1a1a;
    --color-text-secondary: #666666;
    --color-text-light: #999999;
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #fafafa;
    --color-bg-tertiary: #f5f5f5;
    --color-border: #e8e8e8;
    --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-base: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--color-text-main);
    background: var(--color-bg-primary);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* 顶部横幅 */
.top-banner {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: 0.75rem 0;
    text-align: center;
    font-size: 0.875rem;
}

.banner-text {
    display: inline-block;
}

/* 主导航 */
.main-header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition-base);
}

.header-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    gap: 2rem;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.logo-icon {
    font-size: 2rem;
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.tagline {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    display: block;
}

.main-nav {
    flex: 1;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    justify-content: center;
}

.nav-link {
    font-weight: 500;
    color: var(--color-text-main);
    transition: var(--transition-base);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: var(--color-bg-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--color-accent);
    transform: scale(1.1);
}

.btn-primary-small {
    padding: 0.625rem 1.5rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    border: none;
    border-radius: 24px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-primary-small:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.mobile-nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-main);
    transition: var(--transition-base);
}

/* 主视觉区 */
.hero-banner {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding: 2rem 0;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #ffe8f0 0%, #fff5f8 100%);
    z-index: -1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 15% 20%, rgba(255, 107, 149, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 85% 80%, rgba(255, 179, 209, 0.08) 0%, transparent 50%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 30px;
    font-size: 0.875rem;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.hero-heading {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--color-text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.btn-hero-primary,
.btn-hero-secondary {
    padding: 1rem 2.5rem;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.btn-hero-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-hero-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-hero-secondary {
    background: white;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-hero-secondary:hover {
    background: var(--color-accent);
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
}

.metric-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.metric-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* 发现区域 */
.discover-section {
    padding: 5rem 0;
    background: var(--color-bg-primary);
}

.section-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 3rem;
    gap: 2rem;
    flex-wrap: wrap;
}

.section-info {
    flex: 1;
    min-width: 300px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--color-text-main);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.section-filters {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.625rem 1.25rem;
    border: 2px solid var(--color-border);
    background: white;
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
    color: var(--color-text-main);
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--color-primary);
    background: var(--color-accent);
    color: var(--color-primary);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.content-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    cursor: pointer;
}

.content-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.featured-card {
    grid-column: span 2;
}

.card-media {
    position: relative;
    padding-top: 56.25%;
    overflow: hidden;
    background: var(--color-bg-tertiary);
}

.card-media img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.content-card:hover .card-media img {
    transform: scale(1.1);
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-base);
}

.content-card:hover .card-overlay {
    opacity: 1;
}

.play-button {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    font-size: 1.5rem;
    color: var(--color-primary);
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-button:hover {
    transform: scale(1.1);
    background: white;
}

.card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

.card-category {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--color-primary);
    background: var(--color-accent);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text-main);
    line-height: 1.4;
}

.card-excerpt {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.25rem;
    border-top: 1px solid var(--color-border);
}

.author-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.author-details {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-main);
}

.author-time {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.card-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

/* 热门趋势 */
.trending-section {
    padding: 5rem 0;
    background: var(--color-bg-secondary);
}

.section-header-center {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title-large {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text-main);
}

.section-desc-large {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}

.trending-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.trending-item {
    display: flex;
    gap: 2rem;
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.trending-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.trend-rank {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    flex-shrink: 0;
    align-self: center;
}

.trend-content {
    display: flex;
    gap: 1.5rem;
    flex: 1;
}

.trend-image {
    width: 200px;
    height: 120px;
    object-fit: cover;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.trend-info {
    flex: 1;
}

.trend-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-accent);
    color: var(--color-primary);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.trend-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text-main);
}

.trend-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.trend-stats {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* 创作故事 */
.stories-section {
    padding: 5rem 0;
    background: white;
}

.stories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.story-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

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

.story-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.story-author-img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.story-author-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-main);
    margin-bottom: 0.25rem;
}

.story-author-title {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.story-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
}

.story-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-main);
    line-height: 1.4;
}

.story-text {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.story-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
    color: var(--color-text-light);
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

/* 创作工作室 */
.studio-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #ffe8f0 0%, #fff5f8 100%);
}

.studio-intro {
    text-align: center;
    margin-bottom: 4rem;
}

.studio-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text-main);
}

.studio-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}

.tools-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.tool-item {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.tool-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.tool-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-main);
}

.tool-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.tool-features {
    list-style: none;
}

.tool-features li {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
}

.studio-cta {
    text-align: center;
}

.btn-studio {
    padding: 1rem 3rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
}

.btn-studio:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* 连接社区 */
.connect-section {
    padding: 5rem 0;
    background: white;
}

.connect-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.connect-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text-main);
}

.connect-text {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.connect-benefits {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.benefit-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    border-radius: 50%;
    flex-shrink: 0;
}

.benefit-text {
    display: flex;
    flex-direction: column;
}

.benefit-text strong {
    font-size: 1.125rem;
    color: var(--color-text-main);
    margin-bottom: 0.25rem;
}

.benefit-text span {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.connect-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-connect-primary,
.btn-connect-secondary {
    padding: 1rem 2rem;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.btn-connect-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
}

.btn-connect-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-connect-secondary {
    background: white;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-connect-secondary:hover {
    background: var(--color-accent);
}

.connect-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

/* 页脚 */
.main-footer {
    background: var(--color-text-main);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-base);
}

.social-link:hover {
    color: white;
}

.footer-heading {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .featured-card {
        grid-column: span 1;
    }

    .connect-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-list {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: var(--transition-base);
        gap: 1.5rem;
    }

    .nav-list.active {
        left: 0;
    }

    .mobile-nav-toggle {
        display: flex;
    }

    .section-top {
        flex-direction: column;
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .trending-item {
        flex-direction: column;
    }

    .trend-content {
        flex-direction: column;
    }

    .trend-image {
        width: 100%;
        height: 200px;
    }

    .stories-grid {
        grid-template-columns: 1fr;
    }

    .tools-showcase {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero-heading {
        font-size: 2.5rem;
    }

    .section-title,
    .section-title-large {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn-hero-primary,
    .btn-hero-secondary {
        width: 100%;
    }

    .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
    }

    .connect-actions {
        flex-direction: column;
    }

    .btn-connect-primary,
    .btn-connect-secondary {
        width: 100%;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}