/* ===== 日本三级 - 动物写真与视频社区 全站样式 ===== */
/* 原创配色方案：森林绿 #1a5c2e | 深墨绿 #0d3b1a | 暖金 #c8a84e | 象牙白 #f8f5ec | 炭灰 #2b2b2b */

:root {
  --color-primary: #1a5c2e;
  --color-primary-dark: #0d3b1a;
  --color-accent: #c8a84e;
  --color-bg: #f8f5ec;
  --color-text: #2b2b2b;
  --color-text-light: #6b6b6b;
  --color-white: #ffffff;
  --color-card: #ffffff;
  --color-border: #e2ddd0;
  --color-hover: #f0ebe0;
  --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: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
  --max-width: 1200px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
.site-header {
  background: var(--color-primary-dark);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-white);
  font-size: 1.5rem;
  font-weight: 700;
}

.site-logo img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
}

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

.main-nav a {
  color: rgba(255,255,255,0.85);
  padding: 22px 16px;
  font-size: 0.95rem;
  position: relative;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-accent);
  background: rgba(255,255,255,0.06);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--color-accent);
  transition: var(--transition);
  border-radius: 2px 2px 0 0;
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-white);
  font-size: 1.6rem;
  cursor: pointer;
  padding: 8px;
}

/* ===== 搜索框 ===== */
.search-bar {
  background: var(--color-primary);
  padding: 12px 0;
}

.search-bar .container {
  display: flex;
  justify-content: center;
}

.search-form {
  display: flex;
  max-width: 600px;
  width: 100%;
  border-radius: 30px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.search-form input {
  flex: 1;
  padding: 12px 24px;
  border: none;
  font-size: 0.95rem;
  outline: none;
  background: var(--color-white);
  color: var(--color-text);
}

.search-form button {
  padding: 12px 28px;
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  font-size: 0.95rem;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
}

.search-form button:hover { background: #b8982e; }

/* ===== Banner ===== */
.hero-banner {
  position: relative;
  height: 520px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-banner img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(13,59,26,0.82) 0%, rgba(26,92,46,0.6) 50%, rgba(200,168,78,0.3) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-white);
  max-width: 800px;
  padding: 0 20px;
}

.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  line-height: 1.3;
}

.hero-content p {
  font-size: 1.15rem;
  opacity: 0.92;
  margin-bottom: 28px;
  line-height: 1.8;
}

.hero-btn {
  display: inline-block;
  padding: 14px 36px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 30px;
  font-size: 1.05rem;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(200,168,78,0.4);
}

.hero-btn:hover {
  background: #b8982e;
  transform: translateY(-2px);
  color: var(--color-white);
}

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

.breadcrumb a { color: var(--color-primary); }
.breadcrumb span { margin: 0 6px; }

/* ===== 通用区块 ===== */
.section {
  padding: 60px 0;
}

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

.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  font-size: 2rem;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-accent);
  margin: 12px auto 0;
  border-radius: 2px;
}

.section-title p {
  color: var(--color-text-light);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 视频卡片网格 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

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

.video-thumb {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
}

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

.video-card:hover .video-thumb img {
  transform: scale(1.05);
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  background: rgba(200,168,78,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  z-index: 2;
}

.play-btn::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--color-white);
  margin-left: 4px;
}

.video-card:hover .play-btn { opacity: 1; }

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

.video-info {
  padding: 14px 16px;
}

.video-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--color-text-light);
}

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

/* ===== 特色模块 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 1.8rem;
  color: var(--color-white);
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: var(--color-primary-dark);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===== 专家展示 ===== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.expert-card {
  background: var(--color-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
}

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

.expert-photo {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.expert-info {
  padding: 20px;
}

.expert-info h3 {
  font-size: 1.1rem;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}

.expert-info .role {
  font-size: 0.88rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 10px;
}

.expert-info p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-bottom: 14px;
  line-height: 1.6;
}

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

.btn-sm {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

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

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

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

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

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

.faq-item {
  background: var(--color-card);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.faq-question {
  padding: 18px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  font-size: 0.98rem;
}

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

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--color-accent);
  font-weight: 700;
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-question::after {
  content: '-';
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  padding: 0 24px 18px;
  max-height: 300px;
}

/* ===== 用户评价 ===== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-accent);
}

.review-stars {
  color: var(--color-accent);
  font-size: 1rem;
  margin-bottom: 10px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 12px;
  font-style: italic;
}

.review-author {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 600;
}

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.contact-info-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.contact-info-card h3 {
  font-size: 1.15rem;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.92rem;
}

.contact-item strong {
  color: var(--color-primary);
  min-width: 80px;
  flex-shrink: 0;
}

.qrcode-grid {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-top: 20px;
}

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

.qrcode-item img {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.qrcode-item p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 600;
}

/* ===== 社交分享 ===== */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  flex-wrap: wrap;
}

.share-bar span {
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.92rem;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-white);
  transition: var(--transition);
}

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

.share-wechat { background: #07c160; }
.share-weibo { background: #e6162d; }
.share-douyin { background: #161823; }
.share-bilibili { background: #00a1d6; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-primary-dark);
  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-brand .site-logo {
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  opacity: 0.8;
}

.footer-col h4 {
  color: var(--color-accent);
  font-size: 1rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}

.footer-col a {
  display: block;
  color: rgba(255,255,255,0.7);
  padding: 4px 0;
  font-size: 0.88rem;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
}

/* ===== 内页通用 ===== */
.page-header {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  padding: 48px 0;
  text-align: center;
  color: var(--color-white);
}

.page-header h1 {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.page-header p {
  opacity: 0.85;
  font-size: 1rem;
}

.page-content {
  padding: 40px 0 60px;
}

.content-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
}

.content-card h2 {
  font-size: 1.5rem;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-border);
}

.content-card h3 {
  font-size: 1.15rem;
  color: var(--color-primary);
  margin: 20px 0 10px;
}

.content-card p {
  margin-bottom: 14px;
  line-height: 1.8;
  font-size: 0.95rem;
}

.content-card ul, .content-card ol {
  margin: 10px 0 16px 20px;
  line-height: 1.8;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0;
}

.tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-hover);
  border-radius: 16px;
  font-size: 0.82rem;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

/* ===== 合作品牌墙 ===== */
.brand-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}

.brand-wall-item {
  width: 140px;
  height: 70px;
  background: var(--color-card);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.9rem;
}

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

.howto-step {
  display: flex;
  gap: 18px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.howto-step::before {
  counter-increment: step;
  content: counter(step);
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.howto-step-content h4 {
  font-size: 1rem;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}

.howto-step-content p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* ===== 干扰标签隐藏 ===== */
.dz-wrap { display: none !important; }

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

@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }
  .main-nav.active a { padding: 14px 24px; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .mobile-menu-btn { display: block; }
  .hero-banner { height: 380px; }
  .hero-content h1 { font-size: 1.8rem; }
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
  .section-title h2 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .hero-banner { height: 300px; }
  .hero-content h1 { font-size: 1.5rem; }
  .search-form { flex-direction: column; border-radius: var(--radius-sm); }
  .search-form button { border-radius: 0; }
}