/* ===== 每日大赛 - 动物写真与视频社区 全站样式 ===== */
/* 原创配色方案: 深青 #0D7377 / 珊瑚 #FF6B6B / 暗夜 #1A1A2E / 星空蓝 #16213E / 奶白 #F8F6F0 */

:root {
  --primary: #0D7377;
  --primary-light: #14919B;
  --primary-dark: #095456;
  --accent: #FF6B6B;
  --accent-light: #FF8E8E;
  --dark: #1A1A2E;
  --dark-blue: #16213E;
  --cream: #F8F6F0;
  --gray-100: #F5F5F5;
  --gray-200: #E8E8E8;
  --gray-300: #D1D1D1;
  --gray-500: #8A8A8A;
  --gray-700: #4A4A4A;
  --white: #FFFFFF;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
  --radius: 12px;
  --transition: all 0.3s 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", "Helvetica Neue", Arial, sans-serif;
  color: var(--gray-700);
  background: var(--cream);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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: var(--dark);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.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;
}

.site-logo .brand-text {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 1px;
}

.site-logo .brand-text span {
  color: var(--accent);
}

.main-nav { display: flex; align-items: center; gap: 0; }

.main-nav a {
  color: var(--gray-200);
  padding: 22px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--accent);
  background: rgba(255,107,107,0.08);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--accent);
  transition: var(--transition);
  border-radius: 3px 3px 0 0;
}

.main-nav a:hover::after,
.main-nav a.active::after { width: 60%; }

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  width: 26px;
  height: 3px;
  background: var(--white);
  border-radius: 3px;
  transition: var(--transition);
}

/* ===== 搜索栏 ===== */
.search-bar {
  background: var(--dark-blue);
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.search-bar .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.search-input-wrap {
  position: relative;
  width: 100%;
  max-width: 560px;
}

.search-input-wrap input {
  width: 100%;
  padding: 10px 48px 10px 18px;
  border: 2px solid rgba(255,255,255,0.15);
  border-radius: 30px;
  background: rgba(255,255,255,0.06);
  color: var(--white);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.search-input-wrap input::placeholder { color: var(--gray-500); }

.search-input-wrap input:focus {
  border-color: var(--primary-light);
  background: rgba(255,255,255,0.1);
}

.search-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary);
  border: none;
  color: var(--white);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
}

.search-btn:hover { background: var(--accent); }

/* ===== Banner ===== */
.hero-banner {
  position: relative;
  height: 520px;
  overflow: hidden;
  background: var(--dark);
}

.hero-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(13,115,119,0.6) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content {
  text-align: center;
  color: var(--white);
  max-width: 720px;
  padding: 0 20px;
}

.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.hero-content h1 span { color: var(--accent); }

.hero-content p {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 28px;
  line-height: 1.8;
}

.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,107,107,0.4);
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
  background: var(--white);
  color: var(--dark);
  border-color: var(--white);
}

/* ===== 通用区块 ===== */
.section {
  padding: 70px 0;
}

.section-dark {
  background: var(--dark);
  color: var(--white);
}

.section-alt {
  background: var(--white);
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
}

.section-dark .section-title h2 { color: var(--white); }

.section-title p {
  font-size: 1.05rem;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto;
}

.section-dark .section-title p { color: rgba(255,255,255,0.6); }

/* ===== 视频卡片网格 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

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

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.video-thumb {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
  background: var(--gray-200);
}

.video-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.video-card:hover .video-thumb img { transform: scale(1.08); }

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 60px;
  height: 60px;
  background: rgba(255,107,107,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.play-btn::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 20px solid var(--white);
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 4px;
}

.video-card:hover .play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: var(--white);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
}

.video-info {
  padding: 16px;
}

.video-info h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--gray-500);
}

.video-meta span { display: flex; align-items: center; gap: 4px; }

.video-tags {
  display: flex;
  gap: 6px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.video-tags span {
  background: var(--gray-100);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 500;
}

/* ===== 专家卡片 ===== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.expert-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.expert-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--primary-light);
}

.expert-card h4 {
  font-size: 1.1rem;
  color: var(--dark);
  margin-bottom: 6px;
}

.expert-card .role {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.expert-card p {
  font-size: 0.88rem;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: 16px;
}

.expert-links { display: flex; gap: 10px; justify-content: center; }

.expert-links a {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 500;
  border: 1px solid var(--primary);
  color: var(--primary);
  transition: var(--transition);
}

.expert-links a:hover {
  background: var(--primary);
  color: var(--white);
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }

.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  padding: 18px 24px;
  font-weight: 600;
  color: var(--dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover { color: var(--primary); }

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-question::after {
  content: '-';
  color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding: 0 24px 18px;
  color: var(--gray-500);
  line-height: 1.8;
  font-size: 0.95rem;
}

.faq-item.active .faq-answer { max-height: 300px; }

/* ===== 用户评论 ===== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.review-card:hover { box-shadow: var(--shadow-hover); }

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.review-user { flex: 1; }

.review-user strong {
  display: block;
  color: var(--dark);
  font-size: 0.95rem;
}

.review-user .date {
  font-size: 0.82rem;
  color: var(--gray-500);
}

.review-stars {
  color: #FFB800;
  font-size: 0.9rem;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.review-card p {
  font-size: 0.92rem;
  color: var(--gray-700);
  line-height: 1.7;
}

/* ===== 分类模块 ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}

.category-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-bottom: 3px solid var(--accent);
}

.category-icon {
  font-size: 2.4rem;
  margin-bottom: 12px;
}

.category-card h4 {
  font-size: 1rem;
  color: var(--dark);
  margin-bottom: 6px;
}

.category-card p {
  font-size: 0.82rem;
  color: var(--gray-500);
}

/* ===== 合作品牌墙 ===== */
.partner-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
  align-items: center;
}

.partner-item {
  background: var(--white);
  padding: 16px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.95rem;
  transition: var(--transition);
}

.partner-item:hover {
  box-shadow: var(--shadow-hover);
  color: var(--primary);
}

/* ===== 联系信息 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.contact-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  text-align: center;
}

.contact-card h4 {
  color: var(--dark);
  margin-bottom: 12px;
  font-size: 1.05rem;
}

.contact-card p {
  color: var(--gray-500);
  font-size: 0.92rem;
  line-height: 1.7;
}

.contact-card img {
  max-width: 160px;
  margin: 12px auto 0;
  border-radius: 8px;
}

/* ===== 社交分享 ===== */
.share-bar {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--white);
  transition: var(--transition);
}

.share-btn:hover { opacity: 0.85; transform: translateY(-2px); color: var(--white); }

.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #161823; }
.share-bilibili { background: #00A1D6; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.6);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 36px;
  margin-bottom: 36px;
}

.footer-col h4 {
  color: var(--white);
  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(--accent);
  border-radius: 3px;
}

.footer-col a {
  display: block;
  color: rgba(255,255,255,0.5);
  padding: 4px 0;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col a:hover { color: var(--accent); padding-left: 6px; }

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-qr {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}

.footer-qr img {
  width: 100px;
  height: 100px;
  border-radius: 8px;
  border: 2px solid rgba(255,255,255,0.1);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
}

.footer-bottom a { color: var(--accent); }

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.88rem;
  color: var(--gray-500);
}

.breadcrumb a { color: var(--primary); }
.breadcrumb span { margin: 0 8px; color: var(--gray-300); }

/* ===== 内页头部 ===== */
.page-hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
  padding: 60px 0;
  text-align: center;
  color: var(--white);
}

.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-hero p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 内容区 ===== */
.content-area {
  padding: 50px 0;
}

.content-area h2 {
  font-size: 1.6rem;
  color: var(--dark);
  margin-bottom: 16px;
}

.content-area h3 {
  font-size: 1.3rem;
  color: var(--dark);
  margin: 24px 0 12px;
}

.content-area p {
  margin-bottom: 16px;
  line-height: 1.8;
}

.content-area ul, .content-area ol {
  margin: 12px 0 20px 24px;
}

.content-area li {
  margin-bottom: 8px;
  line-height: 1.7;
}

/* ===== How-To 指南 ===== */
.howto-steps {
  counter-reset: step;
  max-width: 700px;
  margin: 0 auto;
}

.howto-step {
  position: relative;
  padding: 24px 24px 24px 72px;
  margin-bottom: 16px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.howto-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 20px;
  top: 24px;
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.howto-step h4 {
  color: var(--dark);
  margin-bottom: 6px;
  font-size: 1.05rem;
}

.howto-step p {
  color: var(--gray-500);
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ===== AI模块 ===== */
.ai-features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.ai-card {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius);
  padding: 32px;
  color: var(--white);
  transition: var(--transition);
}

.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(13,115,119,0.3);
}

.ai-card h4 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  color: var(--accent-light);
}

.ai-card p {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
}

/* ===== 社区板块 ===== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.community-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.community-card .card-img {
  height: 160px;
  overflow: hidden;
}

.community-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.community-card:hover .card-img img { transform: scale(1.08); }

.community-card .card-body {
  padding: 16px;
}

.community-card h4 {
  font-size: 1rem;
  color: var(--dark);
  margin-bottom: 6px;
}

.community-card p {
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* ===== 数据统计 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
  padding: 40px 0;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.section-dark .stat-num { color: var(--accent); }

.stat-label {
  font-size: 0.92rem;
  color: var(--gray-500);
  margin-top: 4px;
}

.section-dark .stat-label { color: rgba(255,255,255,0.6); }

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

/* ===== 干扰标签隐藏 ===== */
.dz-noise { position: absolute; left: -9999px; top: -9999px; width: 0; height: 0; overflow: hidden; visibility: hidden; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .header-inner { height: 56px; }
  .site-logo img { height: 34px; }
  .site-logo .brand-text { font-size: 1.1rem; }

  .main-nav {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--dark);
    flex-direction: column;
    padding: 10px 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  }

  .main-nav.open { display: flex; }

  .main-nav a { padding: 14px 24px; border-bottom: 1px solid rgba(255,255,255,0.05); }

  .mobile-toggle { display: flex; }

  .hero-banner { height: 380px; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-content p { font-size: 0.95rem; }

  .section { padding: 40px 0; }
  .section-title h2 { font-size: 1.5rem; }

  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
  .expert-grid { grid-template-columns: 1fr; }
  .ai-features { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .stat-num { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .hero-banner { height: 300px; }
  .hero-content h1 { font-size: 1.5rem; }
  .video-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
}