/* ============================================
   黄色仓库 - 动物写真视频社区 原创样式表
   配色：北极蓝 #1A6FC4 / 冰川白 #F0F7FF / 暖阳橙 #FF8C42 / 森林绿 #2D8B5E
   ============================================ */
:root {
  --arctic-blue: #1A6FC4;
  --deep-ocean: #0E4A84;
  --ice-white: #F0F7FF;
  --warm-orange: #FF8C42;
  --forest-green: #2D8B5E;
  --snow-white: #FFFFFF;
  --dark-text: #1C2833;
  --gray-text: #5D6D7E;
  --light-gray: #E8EEF4;
  --card-shadow: 0 4px 20px rgba(26,111,196,0.12);
  --hover-shadow: 0 8px 32px rgba(26,111,196,0.22);
  --radius: 12px;
  --transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Helvetica Neue',Arial,sans-serif; color: var(--dark-text); background: var(--ice-white); line-height: 1.7; overflow-x: hidden; }
a { color: var(--arctic-blue); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--warm-orange); }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* === 顶部导航 === */
.site-header { background: linear-gradient(135deg, var(--deep-ocean) 0%, var(--arctic-blue) 100%); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 16px rgba(14,74,132,0.3); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 0 20px; max-width: 1200px; margin: 0 auto; height: 68px; }
.site-logo { display: flex; align-items: center; gap: 10px; }
.site-logo img { height: 42px; width: auto; border-radius: 6px; }
.site-logo span { font-size: 1.4rem; font-weight: 700; color: #fff; letter-spacing: 1px; }
.main-nav { display: flex; gap: 4px; }
.main-nav a { color: rgba(255,255,255,0.88); padding: 8px 16px; border-radius: 8px; font-size: 0.95rem; font-weight: 500; transition: var(--transition); }
.main-nav a:hover, .main-nav a.active { background: rgba(255,255,255,0.18); color: #fff; }
.mobile-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.6rem; cursor: pointer; }

/* === 搜索栏 === */
.search-bar { background: var(--deep-ocean); padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
.search-bar .container { display: flex; justify-content: center; }
.search-box { display: flex; max-width: 600px; width: 100%; }
.search-box input { flex: 1; padding: 10px 18px; border: 2px solid rgba(255,255,255,0.2); border-right: none; border-radius: 25px 0 0 25px; background: rgba(255,255,255,0.1); color: #fff; font-size: 0.95rem; outline: none; transition: var(--transition); }
.search-box input::placeholder { color: rgba(255,255,255,0.5); }
.search-box input:focus { border-color: var(--warm-orange); background: rgba(255,255,255,0.15); }
.search-box button { padding: 10px 24px; background: var(--warm-orange); color: #fff; border: 2px solid var(--warm-orange); border-radius: 0 25px 25px 0; cursor: pointer; font-size: 0.95rem; font-weight: 600; transition: var(--transition); }
.search-box button:hover { background: #e67a35; }

/* === Hero Banner === */
.hero-section { position: relative; min-height: 480px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; filter: brightness(0.55); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(14,74,132,0.6) 0%, rgba(26,111,196,0.4) 100%); }
.hero-content { position: relative; z-index: 2; text-align: center; color: #fff; padding: 40px 20px; max-width: 800px; }
.hero-content h1 { font-size: 2.8rem; font-weight: 800; margin-bottom: 16px; text-shadow: 0 3px 12px rgba(0,0,0,0.4); line-height: 1.3; }
.hero-content h1 em { font-style: normal; color: var(--warm-orange); }
.hero-content p { font-size: 1.15rem; opacity: 0.92; margin-bottom: 24px; line-height: 1.8; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-primary { display: inline-block; padding: 12px 32px; background: var(--warm-orange); color: #fff; border-radius: 30px; font-weight: 600; font-size: 1rem; transition: var(--transition); box-shadow: 0 4px 16px rgba(255,140,66,0.4); }
.btn-primary:hover { background: #e67a35; transform: translateY(-2px); color: #fff; box-shadow: 0 6px 24px rgba(255,140,66,0.5); }
.btn-outline { display: inline-block; padding: 12px 32px; border: 2px solid #fff; color: #fff; border-radius: 30px; font-weight: 600; font-size: 1rem; transition: var(--transition); }
.btn-outline:hover { background: #fff; color: var(--arctic-blue); }

/* === 通用区块 === */
.section { padding: 60px 0; }
.section-alt { background: var(--snow-white); }
.section-title { text-align: center; margin-bottom: 40px; }
.section-title h2 { font-size: 2rem; font-weight: 700; color: var(--deep-ocean); margin-bottom: 10px; }
.section-title p { color: var(--gray-text); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.section-title h2::after { content: ''; display: block; width: 60px; height: 4px; background: linear-gradient(90deg, var(--arctic-blue), var(--warm-orange)); margin: 12px auto 0; border-radius: 2px; }

/* === 视频卡片网格 === */
.video-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.video-card { background: var(--snow-white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--card-shadow); transition: var(--transition); position: relative; }
.video-card:hover { transform: translateY(-6px); box-shadow: var(--hover-shadow); }
.video-thumb { position: relative; overflow: hidden; aspect-ratio: 16/9; background: #dde6f0; }
.video-thumb video, .video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.video-card:hover .video-thumb video,
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-btn { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0.8); width: 56px; height: 56px; background: rgba(255,140,66,0.92); border-radius: 50%; display: flex; align-items: center; justify-content: center; opacity: 0; transition: var(--transition); pointer-events: none; box-shadow: 0 4px 20px rgba(255,140,66,0.5); }
.play-btn::after { content: ''; display: block; width: 0; height: 0; border-style: solid; border-width: 10px 0 10px 18px; border-color: transparent transparent transparent #fff; margin-left: 3px; }
.video-card:hover .play-btn, .play-btn.visible { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-duration { position: absolute; bottom: 8px; right: 8px; background: rgba(0,0,0,0.75); color: #fff; padding: 2px 8px; border-radius: 4px; font-size: 0.8rem; }
.video-stats { position: absolute; bottom: 8px; left: 8px; display: flex; gap: 10px; }
.video-stats span { background: rgba(0,0,0,0.65); color: #fff; padding: 2px 8px; border-radius: 4px; font-size: 0.75rem; }
.video-info { padding: 14px 16px; }
.video-info h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-info .meta { display: flex; justify-content: space-between; color: var(--gray-text); font-size: 0.82rem; }
.video-tag { display: inline-block; background: var(--ice-white); color: var(--arctic-blue); padding: 2px 10px; border-radius: 12px; font-size: 0.78rem; margin-top: 6px; }

/* === 服务模块 === */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.service-card { background: var(--snow-white); border-radius: var(--radius); padding: 32px 24px; text-align: center; box-shadow: var(--card-shadow); transition: var(--transition); border-top: 4px solid transparent; }
.service-card:hover { transform: translateY(-4px); box-shadow: var(--hover-shadow); border-top-color: var(--arctic-blue); }
.service-card:nth-child(2):hover { border-top-color: var(--warm-orange); }
.service-card:nth-child(3):hover { border-top-color: var(--forest-green); }
.service-icon { width: 64px; height: 64px; margin: 0 auto 16px; background: linear-gradient(135deg, var(--arctic-blue), var(--deep-ocean)); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; color: #fff; }
.service-card h3 { font-size: 1.15rem; margin-bottom: 10px; color: var(--deep-ocean); }
.service-card p { color: var(--gray-text); font-size: 0.92rem; line-height: 1.7; }

/* === 专家团队 === */
.expert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.expert-card { background: var(--snow-white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--card-shadow); transition: var(--transition); text-align: center; }
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--hover-shadow); }
.expert-card img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.expert-card .info { padding: 16px; }
.expert-card h4 { font-size: 1.05rem; color: var(--deep-ocean); margin-bottom: 4px; }
.expert-card .role { color: var(--arctic-blue); font-size: 0.85rem; margin-bottom: 6px; }
.expert-card .desc { color: var(--gray-text); font-size: 0.82rem; line-height: 1.6; }
.expert-card .actions { padding: 0 16px 16px; display: flex; gap: 8px; }
.expert-card .actions a { flex: 1; padding: 6px; text-align: center; border-radius: 6px; font-size: 0.82rem; font-weight: 500; }
.btn-contact { background: var(--arctic-blue); color: #fff !important; }
.btn-contact:hover { background: var(--deep-ocean); }
.btn-works { background: var(--light-gray); color: var(--arctic-blue) !important; }
.btn-works:hover { background: var(--arctic-blue); color: #fff !important; }

/* === AI赋能 === */
.ai-showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.ai-showcase img { border-radius: var(--radius); box-shadow: var(--card-shadow); }
.ai-features { list-style: none; }
.ai-features li { padding: 12px 0; border-bottom: 1px solid var(--light-gray); display: flex; align-items: flex-start; gap: 12px; font-size: 0.95rem; }
.ai-features li::before { content: '✦'; color: var(--warm-orange); font-size: 1.1rem; flex-shrink: 0; margin-top: 2px; }

/* === FAQ === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--snow-white); border-radius: var(--radius); margin-bottom: 12px; box-shadow: var(--card-shadow); overflow: hidden; }
.faq-question { padding: 18px 24px; font-weight: 600; cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: var(--transition); }
.faq-question:hover { color: var(--arctic-blue); }
.faq-question::after { content: '+'; font-size: 1.4rem; color: var(--arctic-blue); transition: var(--transition); }
.faq-item.active .faq-question::after { content: '−'; }
.faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; }
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 18px; }
.faq-answer p { color: var(--gray-text); line-height: 1.8; font-size: 0.92rem; }

/* === 用户评论 === */
.review-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.review-card { background: var(--snow-white); border-radius: var(--radius); padding: 24px; box-shadow: var(--card-shadow); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar { width: 48px; height: 48px; border-radius: 50%; background: linear-gradient(135deg, var(--arctic-blue), var(--warm-orange)); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 1.1rem; flex-shrink: 0; }
.review-name { font-weight: 600; font-size: 0.95rem; }
.review-date { color: var(--gray-text); font-size: 0.8rem; }
.review-stars { color: var(--warm-orange); font-size: 0.9rem; letter-spacing: 2px; margin-bottom: 8px; }
.review-text { color: var(--gray-text); font-size: 0.9rem; line-height: 1.7; }

/* === 合作品牌 === */
.partner-wall { display: flex; flex-wrap: wrap; justify-content: center; gap: 32px; align-items: center; padding: 20px 0; }
.partner-wall .partner-item { padding: 16px 28px; background: var(--snow-white); border-radius: var(--radius); box-shadow: var(--card-shadow); font-size: 1.1rem; font-weight: 600; color: var(--gray-text); transition: var(--transition); }
.partner-wall .partner-item:hover { color: var(--arctic-blue); box-shadow: var(--hover-shadow); }

/* === How-To指南 === */
.howto-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.howto-step { background: var(--snow-white); border-radius: var(--radius); padding: 28px 20px; text-align: center; box-shadow: var(--card-shadow); position: relative; counter-increment: step; }
.howto-step::before { content: counter(step); display: block; width: 40px; height: 40px; line-height: 40px; background: var(--arctic-blue); color: #fff; border-radius: 50%; margin: 0 auto 14px; font-weight: 700; font-size: 1.1rem; }
.howto-step h4 { font-size: 1rem; margin-bottom: 8px; color: var(--deep-ocean); }
.howto-step p { color: var(--gray-text); font-size: 0.85rem; line-height: 1.6; }

/* === 社区功能 === */
.community-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.community-card { background: var(--snow-white); border-radius: var(--radius); padding: 24px; box-shadow: var(--card-shadow); transition: var(--transition); text-align: center; }
.community-card:hover { transform: translateY(-4px); box-shadow: var(--hover-shadow); }
.community-card .icon { font-size: 2.2rem; margin-bottom: 12px; }
.community-card h4 { font-size: 1.05rem; color: var(--deep-ocean); margin-bottom: 8px; }
.community-card p { color: var(--gray-text); font-size: 0.88rem; line-height: 1.6; }

/* === 联系我们 === */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info-list { list-style: none; }
.contact-info-list li { padding: 14px 0; border-bottom: 1px solid var(--light-gray); display: flex; gap: 12px; align-items: flex-start; }
.contact-info-list li strong { min-width: 80px; color: var(--deep-ocean); }
.qrcode-group { display: flex; gap: 24px; }
.qrcode-item { text-align: center; }
.qrcode-item img { width: 140px; height: 140px; border-radius: 8px; margin-bottom: 8px; }
.qrcode-item p { font-size: 0.85rem; color: var(--gray-text); }

/* === 社交分享 === */
.share-buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.share-btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 20px; border-radius: 25px; color: #fff; font-size: 0.9rem; font-weight: 500; transition: var(--transition); }
.share-btn:hover { transform: translateY(-2px); color: #fff; opacity: 0.9; }
.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #161823; }
.share-bilibili { background: #00A1D6; }

/* === 面包屑 === */
.breadcrumb { padding: 14px 0; font-size: 0.88rem; color: var(--gray-text); }
.breadcrumb a { color: var(--arctic-blue); }
.breadcrumb span { margin: 0 6px; }

/* === 页脚 === */
.site-footer { background: linear-gradient(135deg, #0a3a66 0%, var(--deep-ocean) 100%); color: rgba(255,255,255,0.8); padding: 48px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
.footer-col h4 { color: #fff; font-size: 1.05rem; margin-bottom: 16px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 3px; background: var(--warm-orange); border-radius: 2px; }
.footer-col p { font-size: 0.88rem; line-height: 1.8; margin-bottom: 8px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: rgba(255,255,255,0.7); font-size: 0.88rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--warm-orange); }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; padding: 16px 0; border-top: 1px solid rgba(255,255,255,0.1); margin-bottom: 16px; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 0.82rem; }
.footer-links a:hover { color: var(--warm-orange); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; font-size: 0.85rem; }
.footer-bottom a { color: rgba(255,255,255,0.7); }

/* === 内页通用 === */
.page-header { background: linear-gradient(135deg, var(--deep-ocean), var(--arctic-blue)); padding: 48px 0; text-align: center; color: #fff; }
.page-header h1 { font-size: 2.2rem; font-weight: 700; margin-bottom: 10px; }
.page-header p { opacity: 0.85; font-size: 1.05rem; }
.page-content { padding: 40px 0 60px; }
.page-content h2 { font-size: 1.6rem; color: var(--deep-ocean); margin: 32px 0 16px; }
.page-content h3 { font-size: 1.25rem; color: var(--arctic-blue); margin: 24px 0 12px; }
.page-content p { color: var(--gray-text); line-height: 1.8; margin-bottom: 16px; }
.article-content { max-width: 900px; margin: 0 auto; }

/* === 权威认证 === */
.authority-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.authority-card { background: var(--snow-white); border-radius: var(--radius); padding: 24px; box-shadow: var(--card-shadow); text-align: center; }
.authority-card .icon { font-size: 2rem; margin-bottom: 10px; color: var(--arctic-blue); }
.authority-card h4 { font-size: 1rem; color: var(--deep-ocean); margin-bottom: 6px; }
.authority-card p { color: var(--gray-text); font-size: 0.85rem; }

/* === 返回顶部 === */
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 46px; height: 46px; background: var(--arctic-blue); color: #fff; border: none; border-radius: 50%; cursor: pointer; font-size: 1.2rem; display: none; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(26,111,196,0.4); transition: var(--transition); z-index: 999; }
.back-to-top:hover { background: var(--warm-orange); }
.back-to-top.show { display: flex; }

/* === 资讯列表 === */
.news-list { max-width: 900px; margin: 0 auto; }
.news-item { background: var(--snow-white); border-radius: var(--radius); padding: 20px 24px; margin-bottom: 16px; box-shadow: var(--card-shadow); transition: var(--transition); }
.news-item:hover { box-shadow: var(--hover-shadow); }
.news-item h3 { font-size: 1.1rem; margin-bottom: 8px; }
.news-item .date { color: var(--gray-text); font-size: 0.82rem; margin-bottom: 6px; }
.news-item p { color: var(--gray-text); font-size: 0.9rem; }

/* === 响应式 === */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .service-grid { grid-template-columns: 1fr; }
  .ai-showcase { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .authority-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-section { min-height: 360px; }
  .main-nav { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: var(--deep-ocean); padding: 16px; gap: 4px; }
  .main-nav.open { display: flex; }
  .mobile-toggle { display: block; }
  .header-inner { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .qrcode-group { flex-direction: column; align-items: center; }
  .expert-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 1.5rem; }
  .section { padding: 40px 0; }
  .section-title h2 { font-size: 1.5rem; }
}