/* =====================================================
   香蕉视频 - 动物写真与视频社区 主样式文件
   Brand: 香蕉视频 | Domain: qeyeyu.cn
   Version: 1.0 | 2025
   ===================================================== */

/* ---- CSS Reset & Variables ---- */
:root {
  --primary: #1a6b3c;
  --primary-dark: #0f4526;
  --primary-light: #2d9b5a;
  --accent: #c8a84b;
  --accent-light: #e8c96a;
  --bg-main: #f4f8f5;
  --bg-card: #ffffff;
  --bg-dark: #0d2b1a;
  --text-main: #1c2b22;
  --text-muted: #5a7265;
  --text-light: #f0f7f3;
  --border: #d0e4d8;
  --shadow: 0 4px 20px rgba(26,107,60,0.10);
  --shadow-hover: 0 8px 32px rgba(26,107,60,0.18);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: 0.28s cubic-bezier(0.4,0,0.2,1);
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ---- Utility Classes ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-alt { background: #eaf4ee; }
.section-dark { background: var(--bg-dark); color: var(--text-light); }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  letter-spacing: 0.5px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(26,107,60,0.25);
}
.btn-primary:hover {
  background: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(26,107,60,0.32);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover {
  background: var(--accent-light);
  color: var(--text-main);
}
.tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
  background: rgba(26,107,60,0.1);
  color: var(--primary);
  margin: 2px;
}

/* ---- Section Headings ---- */
.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 600px;
}
.section-title-wrap { margin-bottom: 44px; }
.section-title-wrap .section-subtitle { margin-bottom: 0; }
.title-deco {
  display: inline-block;
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  margin-bottom: 16px;
}

/* ---- Header / Navigation ---- */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(26,107,60,0.07);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img.logo-img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
}
.site-logo .logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-dark);
  letter-spacing: 1px;
}
.site-logo .logo-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
  line-height: 1;
}
nav.main-nav { display: flex; align-items: center; gap: 4px; }
nav.main-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-main);
  transition: all var(--transition);
  white-space: nowrap;
}
nav.main-nav a:hover,
nav.main-nav a.active {
  background: rgba(26,107,60,0.1);
  color: var(--primary);
}
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-main);
  border: 1.5px solid var(--border);
  border-radius: 50px;
  padding: 6px 16px;
  gap: 8px;
  min-width: 200px;
  transition: border-color var(--transition);
}
.header-search:focus-within { border-color: var(--primary); }
.header-search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.9rem;
  color: var(--text-main);
  width: 100%;
  font-family: var(--font-main);
}
.header-search button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--primary);
  padding: 0;
  display: flex;
  align-items: center;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary-dark);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---- Hero Banner ---- */
.hero-banner {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,43,26,0.82) 0%, rgba(13,43,26,0.45) 60%, rgba(13,43,26,0.15) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  color: #fff;
  padding: 40px 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(200,168,75,0.25);
  border: 1px solid rgba(200,168,75,0.5);
  color: var(--accent-light);
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.hero-title span { color: var(--accent-light); }
.hero-desc {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 32px;
  opacity: 0.92;
  color: rgba(255,255,255,0.9);
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.2);
}
.hero-stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-light);
}
.hero-stat-label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.75);
}

/* ---- Video Cards ---- */
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 22px; }
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #0d2b1a;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.0);
  transition: background var(--transition);
}
.video-card:hover .video-play-btn { background: rgba(0,0,0,0.35); }
.play-icon {
  width: 52px;
  height: 52px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.video-card:hover .play-icon {
  opacity: 1;
  transform: scale(1);
}
.play-icon svg { width: 22px; height: 22px; fill: var(--primary); margin-left: 3px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,0.72);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info { padding: 14px 16px 16px; }
.video-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-stats {
  display: flex;
  gap: 14px;
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.video-stats span { display: flex; align-items: center; gap: 4px; }

/* ---- Feature Cards ---- */
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}
.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.6rem;
}
.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}
.feature-desc { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }

/* ---- Expert Cards ---- */
.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.expert-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.expert-photo {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}
.expert-info { padding: 20px; }
.expert-name { font-size: 1.1rem; font-weight: 800; color: var(--primary-dark); margin-bottom: 4px; }
.expert-role { font-size: 0.85rem; color: var(--accent); font-weight: 600; margin-bottom: 10px; }
.expert-bio { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 14px; line-height: 1.6; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.expert-actions { display: flex; gap: 10px; }
.expert-actions .btn { padding: 8px 16px; font-size: 0.82rem; }

/* ---- Review Cards ---- */
.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  transition: all var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.review-stars { color: var(--accent); font-size: 1rem; margin-bottom: 10px; }
.review-text { font-size: 0.92rem; color: var(--text-main); line-height: 1.7; margin-bottom: 14px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
  flex-shrink: 0;
}
.review-name { font-weight: 700; font-size: 0.9rem; color: var(--text-main); }
.review-date { font-size: 0.78rem; color: var(--text-muted); }

/* ---- FAQ Section ---- */
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-question {
  padding: 18px 22px;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--primary-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  user-select: none;
}
.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding var(--transition);
  padding: 0 22px;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.75;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }

/* ---- Partner Logos ---- */
.partner-grid { display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; align-items: center; }
.partner-logo {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 24px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all var(--transition);
  min-width: 120px;
  text-align: center;
}
.partner-logo:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* ---- Contact Section ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info-item {
  display: flex;
  gap: 14px;
  margin-bottom: 22px;
  align-items: flex-start;
}
.contact-icon {
  width: 44px;
  height: 44px;
  background: rgba(26,107,60,0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  color: var(--primary);
}
.contact-label { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-weight: 600; color: var(--text-main); font-size: 0.95rem; }
.qr-grid { display: flex; gap: 24px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border);
  object-fit: cover;
}
.qr-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }

/* ---- Social Share ---- */
.social-share { display: flex; gap: 10px; flex-wrap: wrap; }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #000; color: #fff; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: translateY(-2px); }

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 14px 0;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--primary); font-weight: 600; }

/* ---- AI Section ---- */
.ai-feature-card {
  background: linear-gradient(135deg, var(--primary-dark), #1a5c35);
  border-radius: var(--radius);
  padding: 28px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.ai-feature-card::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 120px;
  height: 120px;
  background: rgba(200,168,75,0.15);
  border-radius: 50%;
}
.ai-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 50px;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.ai-title { font-size: 1.1rem; font-weight: 800; margin-bottom: 8px; }
.ai-desc { font-size: 0.88rem; opacity: 0.85; line-height: 1.65; }

/* ---- Footer ---- */
#site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.8);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo-text { color: #fff; font-size: 1.3rem; }
.footer-brand .logo-sub { color: rgba(255,255,255,0.5); }
.footer-desc {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.75;
  margin: 14px 0 20px;
}
.footer-heading {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a {
  font-size: 0.87rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent-light); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent-light); }

/* ---- Page Hero (inner pages) ---- */
.page-hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #fff;
  padding: 60px 0 50px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 300px;
  height: 300px;
  background: rgba(200,168,75,0.1);
  border-radius: 50%;
}
.page-hero-title {
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 10px;
}
.page-hero-desc { font-size: 1rem; opacity: 0.85; max-width: 560px; }

/* ---- Lazy Load ---- */
img[data-src] { opacity: 0; transition: opacity 0.4s ease; }
img.loaded { opacity: 1; }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-main); }
::-webkit-scrollbar-thumb { background: var(--primary-light); border-radius: 3px; }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .section-title { font-size: 1.6rem; }
  nav.main-nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px; border-bottom: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
  nav.main-nav.open { display: flex; }
  .hamburger { display: flex; }
  .header-search { display: none; }
  .hero-banner { min-height: 70vh; }
  .hero-title { font-size: 1.8rem; }
  .hero-stats { gap: 20px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}
@media (max-width: 480px) {
  .container { padding: 0 14px; }
  .hero-actions { flex-direction: column; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
}