/* ============================================
   校花影视传媒创作社区 - 原创样式表
   配色方案：晨曦玫瑰主题
   主色：#E8436F  辅色：#2D1B4E  强调色：#F5A623
   ============================================ */

/* === 基础重置与变量 === */
:root {
    --xh-primary: #E8436F;
    --xh-primary-dark: #C7325A;
    --xh-secondary: #2D1B4E;
    --xh-accent: #F5A623;
    --xh-bg: #FAF5F7;
    --xh-bg-white: #FFFFFF;
    --xh-text: #1A1A2E;
    --xh-text-light: #6B6B80;
    --xh-text-muted: #9999AA;
    --xh-border: #EDE5EA;
    --xh-shadow: 0 4px 20px rgba(45, 27, 78, 0.08);
    --xh-shadow-hover: 0 8px 32px rgba(232, 67, 111, 0.15);
    --xh-radius: 12px;
    --xh-radius-sm: 8px;
    --xh-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --xh-font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --xh-font-en: "Inter", var(--xh-font);
}

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

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

body {
    font-family: var(--xh-font);
    color: var(--xh-text);
    background: var(--xh-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: var(--xh-primary); text-decoration: none; transition: var(--xh-transition); }
a:hover { color: var(--xh-primary-dark); }

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

ul, ol { list-style: none; }

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

/* === 按钮 === */
.xh-btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--xh-radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--xh-transition);
    border: 2px solid transparent;
    text-align: center;
}

.xh-btn-primary {
    background: var(--xh-primary);
    color: #fff;
    border-color: var(--xh-primary);
}
.xh-btn-primary:hover {
    background: var(--xh-primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 67, 111, 0.35);
}

.xh-btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.7);
}
.xh-btn-outline:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-color: #fff;
}

.xh-btn-secondary {
    background: var(--xh-secondary);
    color: #fff;
    border-color: var(--xh-secondary);
}
.xh-btn-secondary:hover {
    background: #3D2A62;
    color: #fff;
    transform: translateY(-2px);
}

.xh-btn-sm {
    padding: 8px 18px;
    font-size: 13px;
    background: var(--xh-primary);
    color: #fff;
    border-radius: 6px;
}
.xh-btn-sm:hover { background: var(--xh-primary-dark); color: #fff; }

.xh-btn-outline-sm {
    background: transparent;
    color: var(--xh-primary);
    border: 1px solid var(--xh-primary);
}
.xh-btn-outline-sm:hover { background: var(--xh-primary); color: #fff; }

/* === 头部导航 === */
.xh-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 8px rgba(0,0,0,0.06);
    transition: var(--xh-transition);
}

.xh-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 20px;
}

.xh-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.xh-logo img { border-radius: 10px; }
.xh-logo-text {
    font-size: 22px;
    font-weight: 800;
    color: var(--xh-primary);
    letter-spacing: 1px;
}

.xh-nav { flex: 1; }
.xh-nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
    justify-content: center;
}
.xh-nav-list li a {
    display: block;
    padding: 8px 14px;
    color: var(--xh-text);
    font-size: 14px;
    font-weight: 500;
    border-radius: 6px;
    transition: var(--xh-transition);
}
.xh-nav-list li a:hover,
.xh-nav-list li a.xh-nav-active {
    color: var(--xh-primary);
    background: rgba(232, 67, 111, 0.08);
}

.xh-search {
    display: flex;
    align-items: center;
    background: var(--xh-bg);
    border-radius: 24px;
    padding: 4px 4px 4px 16px;
    border: 1px solid var(--xh-border);
    transition: var(--xh-transition);
    flex-shrink: 0;
}
.xh-search:focus-within {
    border-color: var(--xh-primary);
    box-shadow: 0 0 0 3px rgba(232, 67, 111, 0.1);
}
.xh-search-input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 13px;
    width: 180px;
    color: var(--xh-text);
    font-family: var(--xh-font);
}
.xh-search-input::placeholder { color: var(--xh-text-muted); }
.xh-search-btn {
    background: var(--xh-primary);
    border: none;
    border-radius: 50%;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #fff;
    transition: var(--xh-transition);
}
.xh-search-btn:hover { background: var(--xh-primary-dark); }

.xh-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.xh-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--xh-text);
    border-radius: 2px;
    transition: var(--xh-transition);
}

/* === Hero Banner === */
.xh-hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    margin-top: 68px;
    overflow: hidden;
}
.xh-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.xh-hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.xh-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(45, 27, 78, 0.85), rgba(232, 67, 111, 0.65));
    z-index: 1;
}
.xh-hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
    text-align: center;
    padding: 60px 0;
    max-width: 800px;
    margin: 0 auto;
}
.xh-hero-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.3;
    text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.xh-hero-subtitle {
    font-size: 20px;
    margin-bottom: 12px;
    opacity: 0.95;
    font-weight: 400;
}
.xh-hero-desc {
    font-size: 15px;
    opacity: 0.85;
    margin-bottom: 32px;
    line-height: 1.8;
}
.xh-hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.xh-hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    flex-wrap: wrap;
}
.xh-stat-item { text-align: center; }
.xh-stat-num {
    display: block;
    font-size: 28px;
    font-weight: 800;
    font-family: var(--xh-font-en);
    color: var(--xh-accent);
}
.xh-stat-label {
    font-size: 13px;
    opacity: 0.8;
    margin-top: 4px;
}

/* === 面包屑 === */
.xh-breadcrumb {
    padding: 14px 0;
    background: var(--xh-bg-white);
    border-bottom: 1px solid var(--xh-border);
}
.xh-breadcrumb ol {
    display: flex;
    gap: 8px;
    font-size: 13px;
    color: var(--xh-text-muted);
}
.xh-breadcrumb li + li::before {
    content: "›";
    margin-right: 8px;
    color: var(--xh-text-muted);
}
.xh-breadcrumb a { color: var(--xh-text-light); }
.xh-breadcrumb a:hover { color: var(--xh-primary); }

/* === 通用区块 === */
.xh-section {
    padding: 72px 0;
}
.xh-section:nth-child(even) {
    background: var(--xh-bg-white);
}
.xh-section-header {
    text-align: center;
    margin-bottom: 48px;
}
.xh-section-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--xh-secondary);
    margin-bottom: 12px;
    position: relative;
}
.xh-section-title::after {
    content: "";
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--xh-primary), var(--xh-accent));
    margin: 12px auto 0;
    border-radius: 2px;
}
.xh-section-desc {
    font-size: 15px;
    color: var(--xh-text-light);
    max-width: 680px;
    margin: 0 auto;
}
.xh-section-more {
    text-align: center;
    margin-top: 40px;
}

/* === 视频卡片网格 === */
.xh-video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.xh-video-card {
    background: var(--xh-bg-white);
    border-radius: var(--xh-radius);
    overflow: hidden;
    box-shadow: var(--xh-shadow);
    transition: var(--xh-transition);
}
.xh-video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--xh-shadow-hover);
}
.xh-video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #1A1A2E;
}
.xh-video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.xh-video-card:hover .xh-video-thumb img {
    transform: scale(1.05);
}
.xh-play-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--xh-transition);
}
.xh-video-card:hover .xh-play-overlay {
    opacity: 1;
}
.xh-play-btn {
    width: 64px;
    height: 64px;
    background: rgba(232, 67, 111, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--xh-transition);
    cursor: pointer;
}
.xh-play-btn:hover {
    transform: scale(1.1);
    background: var(--xh-primary);
}
.xh-video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--xh-font-en);
}
.xh-video-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--xh-primary);
    color: #fff;
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 4px;
    font-weight: 600;
}
.xh-video-info {
    padding: 16px;
}
.xh-video-info h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.5;
}
.xh-video-info h3 a { color: var(--xh-text); }
.xh-video-info h3 a:hover { color: var(--xh-primary); }
.xh-video-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--xh-text-muted);
    margin-bottom: 8px;
    flex-wrap: wrap;
}
.xh-video-desc {
    font-size: 13px;
    color: var(--xh-text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* === AI赋能区块 === */
.xh-ai-section { background: linear-gradient(180deg, #FAF5F7, #F3EBF0); }
.xh-ai-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.xh-ai-card {
    background: var(--xh-bg-white);
    border-radius: var(--xh-radius);
    overflow: hidden;
    box-shadow: var(--xh-shadow);
    transition: var(--xh-transition);
}
.xh-ai-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--xh-shadow-hover);
}
.xh-ai-img { overflow: hidden; }
.xh-ai-img img {
    width: 100%;
    aspect-ratio: 3/2;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.xh-ai-card:hover .xh-ai-img img { transform: scale(1.05); }
.xh-ai-info {
    padding: 20px;
}
.xh-ai-info h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--xh-secondary);
    margin-bottom: 10px;
}
.xh-ai-info p {
    font-size: 14px;
    color: var(--xh-text-light);
    line-height: 1.7;
    margin-bottom: 12px;
}
.xh-ai-features {
    padding-left: 16px;
}
.xh-ai-features li {
    font-size: 13px;
    color: var(--xh-text-light);
    padding: 3px 0;
    position: relative;
    list-style: none;
}
.xh-ai-features li::before {
    content: "✓";
    color: var(--xh-primary);
    font-weight: 700;
    margin-right: 8px;
}

/* === 娱乐专区 === */
.xh-ent-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.xh-ent-card {
    background: var(--xh-bg-white);
    border-radius: var(--xh-radius);
    overflow: hidden;
    box-shadow: var(--xh-shadow);
    transition: var(--xh-transition);
    text-align: center;
}
.xh-ent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--xh-shadow-hover);
}
.xh-ent-img { overflow: hidden; }
.xh-ent-img img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.xh-ent-card:hover .xh-ent-img img { transform: scale(1.05); }
.xh-ent-card h4 {
    font-size: 16px;
    font-weight: 700;
    padding: 14px 14px 6px;
    color: var(--xh-secondary);
}
.xh-ent-card p {
    font-size: 13px;
    color: var(--xh-text-light);
    padding: 0 14px 16px;
    line-height: 1.6;
}

/* === 专家团队 === */
.xh-expert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.xh-expert-card {
    background: var(--xh-bg-white);
    border-radius: var(--xh-radius);
    padding: 24px;
    text-align: center;
    box-shadow: var(--xh-shadow);
    transition: var(--xh-transition);
}
.xh-expert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--xh-shadow-hover);
}
.xh-expert-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 14px;
    border: 3px solid var(--xh-border);
}
.xh-expert-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--xh-secondary);
    margin-bottom: 4px;
}
.xh-expert-title {
    font-size: 13px;
    color: var(--xh-primary);
    font-weight: 600;
    margin-bottom: 10px;
}
.xh-expert-desc {
    font-size: 13px;
    color: var(--xh-text-light);
    line-height: 1.7;
    margin-bottom: 12px;
}
.xh-expert-tags {
    display: flex;
    gap: 6px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 14px;
}
.xh-expert-tags span {
    font-size: 11px;
    padding: 3px 10px;
    background: rgba(232, 67, 111, 0.08);
    color: var(--xh-primary);
    border-radius: 20px;
    font-weight: 500;
}
.xh-expert-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
}

/* === 社区功能 === */
.xh-comm-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.xh-comm-item {
    background: var(--xh-bg-white);
    border-radius: var(--xh-radius);
    padding: 28px;
    text-align: center;
    box-shadow: var(--xh-shadow);
    transition: var(--xh-transition);
    border: 1px solid var(--xh-border);
}
.xh-comm-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--xh-shadow-hover);
    border-color: var(--xh-primary);
}
.xh-comm-icon {
    font-size: 36px;
    margin-bottom: 14px;
}
.xh-comm-item h5 {
    font-size: 17px;
    font-weight: 700;
    color: var(--xh-secondary);
    margin-bottom: 8px;
}
.xh-comm-item p {
    font-size: 13px;
    color: var(--xh-text-light);
    line-height: 1.7;
}

/* === 合作品牌 === */
.xh-partner-wall {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}
.xh-partner-item {
    background: var(--xh-bg-white);
    border: 1px solid var(--xh-border);
    border-radius: var(--xh-radius-sm);
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80px;
    transition: var(--xh-transition);
}
.xh-partner-item:hover {
    border-color: var(--xh-primary);
    box-shadow: var(--xh-shadow);
}
.xh-partner-item span {
    font-size: 14px;
    font-weight: 600;
    color: var(--xh-text-light);
}

/* === 如何加入 + FAQ === */
.xh-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 56px;
}
.xh-step {
    text-align: center;
    padding: 28px;
    background: var(--xh-bg-white);
    border-radius: var(--xh-radius);
    box-shadow: var(--xh-shadow);
    position: relative;
}
.xh-step-num {
    font-size: 48px;
    font-weight: 900;
    color: rgba(232, 67, 111, 0.12);
    font-family: var(--xh-font-en);
    margin-bottom: 8px;
}
.xh-step h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--xh-secondary);
    margin-bottom: 10px;
}
.xh-step p {
    font-size: 14px;
    color: var(--xh-text-light);
    line-height: 1.7;
}

.xh-faq-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--xh-secondary);
    text-align: center;
    margin-bottom: 28px;
}
.xh-faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.xh-faq-item {
    border: 1px solid var(--xh-border);
    border-radius: var(--xh-radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    background: var(--xh-bg-white);
}
.xh-faq-q {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 15px;
    color: var(--xh-text);
    transition: var(--xh-transition);
}
.xh-faq-q:hover { color: var(--xh-primary); }
.xh-faq-toggle {
    font-size: 20px;
    color: var(--xh-primary);
    font-weight: 700;
    transition: var(--xh-transition);
    flex-shrink: 0;
    margin-left: 12px;
}
.xh-faq-item.active .xh-faq-toggle { transform: rotate(45deg); }
.xh-faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
.xh-faq-item.active .xh-faq-a { max-height: 300px; }
.xh-faq-a p {
    padding: 0 20px 16px;
    font-size: 14px;
    color: var(--xh-text-light);
    line-height: 1.8;
}

/* === 用户评价 === */
.xh-review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.xh-review-card {
    background: var(--xh-bg-white);
    border-radius: var(--xh-radius);
    padding: 24px;
    box-shadow: var(--xh-shadow);
    transition: var(--xh-transition);
}
.xh-review-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--xh-shadow-hover);
}
.xh-review-stars {
    color: var(--xh-accent);
    font-size: 18px;
    margin-bottom: 12px;
    letter-spacing: 2px;
}
.xh-review-text {
    font-size: 14px;
    color: var(--xh-text);
    line-height: 1.8;
    margin-bottom: 16px;
    font-style: italic;
}
.xh-review-author strong {
    display: block;
    font-size: 14px;
    color: var(--xh-secondary);
}
.xh-review-author span {
    font-size: 12px;
    color: var(--xh-text-muted);
}

/* === 联系我们 === */
.xh-contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}
.xh-contact-info h4 {
    font-size: 22px;
    font-weight: 700;
    color: var(--xh-secondary);
    margin-bottom: 20px;
}
.xh-contact-info h5 {
    font-size: 17px;
    font-weight: 700;
    color: var(--xh-secondary);
    margin: 20px 0 12px;
    padding-top: 16px;
    border-top: 1px solid var(--xh-border);
}
.xh-contact-item {
    display: flex;
    gap: 12px;
    padding: 8px 0;
    font-size: 14px;
    border-bottom: 1px solid var(--xh-border);
}
.xh-contact-label {
    font-weight: 600;
    color: var(--xh-text);
    min-width: 80px;
    flex-shrink: 0;
}
.xh-contact-item span:last-child { color: var(--xh-text-light); }
.xh-contact-qr {
    display: flex;
    gap: 32px;
    justify-content: center;
    align-items: flex-start;
}
.xh-qr-item {
    text-align: center;
}
.xh-qr-item img {
    border-radius: var(--xh-radius-sm);
    border: 1px solid var(--xh-border);
    margin-bottom: 8px;
}
.xh-qr-item p {
    font-size: 13px;
    color: var(--xh-text-light);
    font-weight: 500;
}

/* === 社交分享 === */
.xh-share {
    text-align: center;
    background: linear-gradient(135deg, var(--xh-secondary), var(--xh-primary)) !important;
    color: #fff;
    padding: 48px 0;
}
.xh-share h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}
.xh-share p {
    font-size: 14px;
    opacity: 0.85;
    margin-bottom: 24px;
}
.xh-share-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.xh-share-btn {
    display: inline-block;
    padding: 10px 28px;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.4);
    transition: var(--xh-transition);
}
.xh-share-btn:hover {
    background: rgba(255,255,255,0.2);
    border-color: #fff;
    color: #fff;
}

/* === 底部 === */
.xh-footer {
    background: var(--xh-secondary);
    color: rgba(255,255,255,0.8);
    padding: 56px 0 0;
}
.xh-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.xh-footer-brand {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.xh-footer-brand img { border-radius: 8px; }
.xh-footer-logo-text {
    font-size: 20px;
    font-weight: 800;
    color: #fff;
}
.xh-footer-brand p {
    font-size: 13px;
    line-height: 1.7;
    opacity: 0.7;
}
.xh-footer-links h6,
.xh-footer-contact h6 {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}
.xh-footer-links ul li {
    margin-bottom: 8px;
}
.xh-footer-links ul li a {
    color: rgba(255,255,255,0.65);
    font-size: 13px;
    transition: var(--xh-transition);
}
.xh-footer-links ul li a:hover { color: var(--xh-accent); }
.xh-footer-contact p {
    font-size: 13px;
    margin-bottom: 6px;
    opacity: 0.7;
}
.xh-footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 13px;
    opacity: 0.6;
}
.xh-footer-bottom a { color: var(--xh-accent); }
.xh-footer-bottom p + p { margin-top: 4px; }

/* === 返回顶部 === */
.xh-back-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: var(--xh-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--xh-transition);
    z-index: 999;
    box-shadow: 0 4px 12px rgba(232, 67, 111, 0.3);
}
.xh-back-top.visible {
    opacity: 1;
    visibility: visible;
}
.xh-back-top:hover {
    background: var(--xh-primary-dark);
    transform: translateY(-3px);
}

/* === 懒加载占位 === */
.xh-lazy {
    opacity: 0;
    transition: opacity 0.5s ease;
}
.xh-lazy.loaded {
    opacity: 1;
}

/* === 响应式 === */
@media (max-width: 1024px) {
    .xh-video-grid { grid-template-columns: repeat(2, 1fr); }
    .xh-ai-grid { grid-template-columns: repeat(2, 1fr); }
    .xh-expert-grid { grid-template-columns: repeat(2, 1fr); }
    .xh-ent-grid { grid-template-columns: repeat(2, 1fr); }
    .xh-partner-wall { grid-template-columns: repeat(3, 1fr); }
    .xh-footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .xh-header-inner { height: 56px; }
    .xh-nav { display: none; }
    .xh-nav.active {
        display: block;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: #fff;
        box-shadow: 0 8px 24px rgba(0,0,0,0.1);
        padding: 16px;
    }
    .xh-nav.active .xh-nav-list {
        flex-direction: column;
        gap: 0;
    }
    .xh-nav.active .xh-nav-list li a {
        padding: 12px 16px;
        border-bottom: 1px solid var(--xh-border);
        display: block;
    }
    .xh-search { display: none; }
    .xh-menu-toggle { display: flex; }

    .xh-hero { min-height: 480px; margin-top: 56px; }
    .xh-hero-title { font-size: 28px; }
    .xh-hero-subtitle { font-size: 16px; }
    .xh-hero-stats { gap: 24px; }
    .xh-stat-num { font-size: 22px; }

    .xh-section { padding: 48px 0; }
    .xh-section-title { font-size: 24px; }

    .xh-video-grid { grid-template-columns: 1fr; }
    .xh-ai-grid { grid-template-columns: 1fr; }
    .xh-ent-grid { grid-template-columns: repeat(2, 1fr); }
    .xh-expert-grid { grid-template-columns: 1fr; }
    .xh-comm-grid { grid-template-columns: repeat(2, 1fr); }
    .xh-review-grid { grid-template-columns: 1fr; }
    .xh-steps { grid-template-columns: 1fr; }
    .xh-partner-wall { grid-template-columns: repeat(2, 1fr); }
    .xh-contact-grid { grid-template-columns: 1fr; }
    .xh-contact-qr { justify-content: flex-start; }
    .xh-footer-grid { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 480px) {
    .xh-hero-title { font-size: 24px; }
    .xh-hero-actions { flex-direction: column; align-items: center; }
    .xh-ent-grid { grid-template-columns: 1fr; }
    .xh-comm-grid { grid-template-columns: 1fr; }
    .xh-contact-qr { flex-direction: column; align-items: center; }
}