/* ============================================================
   芒果视频植物视频社区 - 完全原创样式
   主题：深林翠绿 · 自然探索 · 植物视频
   主色：#1a472a (深绿) / #52c41a (翠绿) / #0d1f12 (极深绿)
   ug0r11.cn
   ============================================================ */

:root {
  --c-primary:    #52c41a;
  --c-primary-d:  #389e0d;
  --c-primary-l:  #b7eb8f;
  --c-dark:       #0d1f12;
  --c-dark2:      #1a2e1e;
  --c-dark3:      #243b29;
  --c-card:       #1e3424;
  --c-border:     #2d4a33;
  --c-text:       #d4edda;
  --c-text-m:     #a8d5b5;
  --c-text-s:     #6aaa7a;
  --c-accent:     #73d13d;
  --c-warn:       #faad14;
  --c-danger:     #ff4d4f;
  --c-white:      #ffffff;
  --radius:       12px;
  --radius-s:     8px;
  --shadow:       0 4px 24px rgba(0,0,0,0.45);
  --shadow-s:     0 2px 12px rgba(0,0,0,0.3);
  --trans:        all 0.28s cubic-bezier(0.4,0,0.2,1);
  --font:         'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
}

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

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

body {
  font-family: var(--font);
  background: var(--c-dark);
  color: var(--c-text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--c-accent); text-decoration: none; transition: var(--trans); }
a:hover { color: var(--c-primary-l); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; outline: none; font-family: var(--font); }

/* ── 容器 ── */
.container { max-width: 1240px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-alt { background: var(--c-dark2); }
.section-dark { background: var(--c-dark3); }

.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--c-white);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.section-header h2 span { color: var(--c-primary); }
.section-header p { color: var(--c-text-m); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.section-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-d));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ── 按钮 ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-s);
  font-size: 0.95rem; font-weight: 600;
  transition: var(--trans); cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-d));
  color: #fff; border: none;
  box-shadow: 0 4px 16px rgba(82,196,26,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(82,196,26,0.5); color: #fff; }
.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border: 2px solid var(--c-primary);
}
.btn-outline:hover { background: var(--c-primary); color: #fff; }

/* ── HEADER ── */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(13,31,18,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.header-logo a {
  display: flex; align-items: center; gap: 12px;
  color: var(--c-white);
}
.header-logo img { border-radius: 50%; border: 2px solid var(--c-primary); }
.logo-brand { font-size: 1.4rem; font-weight: 800; color: var(--c-primary); }
.logo-sub { font-size: 0.72rem; color: var(--c-text-s); display: block; }
.main-nav ul { display: flex; gap: 4px; }
.main-nav a {
  padding: 8px 14px; border-radius: var(--radius-s);
  color: var(--c-text-m); font-size: 0.9rem; font-weight: 500;
  transition: var(--trans);
}
.main-nav a:hover, .main-nav a.active {
  background: var(--c-dark3); color: var(--c-primary);
}
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px; background: var(--c-text);
  border-radius: 2px; transition: var(--trans);
}

/* 搜索框 */
.header-search {
  background: var(--c-dark2);
  border-bottom: 1px solid var(--c-border);
  padding: 10px 0;
}
.search-inner { max-width: 1240px; margin: 0 auto; padding: 0 20px; }
.search-form {
  display: flex; gap: 0;
  background: var(--c-dark3);
  border: 1px solid var(--c-border);
  border-radius: 24px; overflow: hidden;
  max-width: 680px;
}
.search-form input {
  flex: 1; padding: 10px 20px;
  background: none; border: none; outline: none;
  color: var(--c-text); font-size: 0.9rem;
}
.search-form input::placeholder { color: var(--c-text-s); }
.search-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-d));
  color: #fff; font-size: 0.9rem; font-weight: 600;
  border-radius: 0 24px 24px 0;
  transition: var(--trans);
}
.search-btn:hover { background: linear-gradient(135deg, var(--c-primary-d), #237804); }
.search-hot { margin-top: 8px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.search-hot span { color: var(--c-text-s); font-size: 0.8rem; }
.search-hot a {
  font-size: 0.8rem; color: var(--c-text-m);
  background: var(--c-dark3); padding: 3px 10px; border-radius: 12px;
  border: 1px solid var(--c-border);
}
.search-hot a:hover { color: var(--c-primary); border-color: var(--c-primary); }

/* 移动端导航 */
.mobile-nav {
  display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(13,31,18,0.98); z-index: 999;
  padding: 80px 20px 20px;
}
.mobile-nav.open { display: block; }
.mobile-nav ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav a {
  display: block; padding: 14px 20px;
  color: var(--c-text); font-size: 1.1rem;
  border-radius: var(--radius-s);
  border-bottom: 1px solid var(--c-border);
}
.mobile-nav a:hover { background: var(--c-dark3); color: var(--c-primary); }

/* ── HERO BANNER ── */
.hero-banner {
  position: relative; min-height: 560px;
  display: flex; align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('/assets/images/banner.jpg');
  background-size: cover; background-position: center;
  filter: brightness(0.45);
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(13,31,18,0.7) 0%, rgba(26,71,42,0.4) 50%, rgba(13,31,18,0.8) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 1240px; margin: 0 auto; padding: 60px 20px;
  width: 100%;
}
.hero-tag {
  display: inline-block;
  background: rgba(82,196,26,0.2);
  border: 1px solid var(--c-primary);
  color: var(--c-primary);
  padding: 4px 16px; border-radius: 20px;
  font-size: 0.8rem; font-weight: 600; margin-bottom: 20px;
  letter-spacing: 0.08em;
}
.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 900; color: var(--c-white);
  line-height: 1.15; margin-bottom: 20px;
  letter-spacing: -0.03em;
}
.hero-content h1 span { color: var(--c-primary); }
.hero-desc {
  font-size: 1.05rem; color: var(--c-text-m);
  max-width: 580px; margin-bottom: 32px; line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; max-width: 600px;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 2rem; font-weight: 900; color: var(--c-primary);
  line-height: 1;
}
.stat-label { font-size: 0.8rem; color: var(--c-text-s); margin-top: 4px; }

/* ── 视频卡片 ── */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--trans);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(82,196,26,0.2);
  border-color: var(--c-primary);
}
.video-thumb {
  position: relative; overflow: hidden;
  aspect-ratio: 16/9;
}
.video-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.play-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0; transition: var(--trans);
}
.video-card:hover .play-overlay { opacity: 1; }
.play-btn {
  width: 56px; height: 56px;
  background: rgba(82,196,26,0.9);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transform: scale(0.8); transition: var(--trans);
  box-shadow: 0 4px 20px rgba(82,196,26,0.5);
}
.video-card:hover .play-btn { transform: scale(1); }
.play-btn svg { margin-left: 4px; }
.video-quality {
  position: absolute; top: 8px; right: 8px;
  background: rgba(82,196,26,0.9);
  color: #fff; font-size: 0.7rem; font-weight: 700;
  padding: 2px 8px; border-radius: 4px;
}
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff; font-size: 0.75rem;
  padding: 2px 6px; border-radius: 4px;
}
.video-body { padding: 14px; }
.video-title {
  font-size: 0.92rem; font-weight: 600; color: var(--c-white);
  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; justify-content: space-between;
  font-size: 0.78rem; color: var(--c-text-s);
}
.video-stats { display: flex; gap: 12px; }
.video-stats span { display: flex; align-items: center; gap: 4px; }
.video-tag {
  display: inline-block;
  background: rgba(82,196,26,0.15);
  color: var(--c-primary);
  font-size: 0.7rem; padding: 2px 8px;
  border-radius: 4px; margin-bottom: 6px;
}

/* 视频筛选 */
.video-filter {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 28px;
}
.filter-btn {
  padding: 8px 20px; border-radius: 20px;
  font-size: 0.85rem; font-weight: 500;
  background: var(--c-dark3); color: var(--c-text-m);
  border: 1px solid var(--c-border);
  transition: var(--trans);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--c-primary); color: #fff; border-color: var(--c-primary);
}

/* ── 功能卡片 ── */
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--trans);
}
.feature-card:hover {
  border-color: var(--c-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-s);
}
.feature-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, rgba(82,196,26,0.2), rgba(82,196,26,0.05));
  border: 1px solid rgba(82,196,26,0.3);
  border-radius: var(--radius-s);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin-bottom: 16px;
}
.feature-card h3 { font-size: 1rem; font-weight: 700; color: var(--c-white); margin-bottom: 8px; }
.feature-desc { font-size: 0.88rem; color: var(--c-text-m); line-height: 1.7; }

/* ── 专家卡片 ── */
.expert-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px; text-align: center;
  transition: var(--trans);
}
.expert-card:hover {
  border-color: var(--c-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-s);
}
.expert-avatar {
  width: 80px; height: 80px; border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-d));
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; margin: 0 auto 16px;
  border: 3px solid rgba(82,196,26,0.3);
}
.expert-name { font-size: 1rem; font-weight: 700; color: var(--c-white); margin-bottom: 4px; }
.expert-role { font-size: 0.8rem; color: var(--c-primary); margin-bottom: 8px; }
.expert-desc { font-size: 0.82rem; color: var(--c-text-m); line-height: 1.6; margin-bottom: 12px; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 4px; justify-content: center; margin-bottom: 12px; }
.expert-tag {
  font-size: 0.7rem; padding: 2px 8px;
  background: rgba(82,196,26,0.1); color: var(--c-primary);
  border-radius: 4px; border: 1px solid rgba(82,196,26,0.2);
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.expert-btn {
  font-size: 0.78rem; padding: 6px 14px;
  border-radius: var(--radius-s);
  background: var(--c-dark3); color: var(--c-text-m);
  border: 1px solid var(--c-border);
  transition: var(--trans);
}
.expert-btn:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* ── 社区功能 ── */
.community-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.community-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden; transition: var(--trans);
}
.community-card:hover {
  border-color: var(--c-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-s);
}
.community-img {
  aspect-ratio: 16/9; overflow: hidden;
}
.community-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.community-card:hover .community-img img { transform: scale(1.06); }
.community-body { padding: 16px; }
.community-body h3 { font-size: 0.95rem; font-weight: 700; color: var(--c-white); margin-bottom: 6px; }
.community-body p { font-size: 0.82rem; color: var(--c-text-m); line-height: 1.6; }
.community-meta { display: flex; gap: 12px; margin-top: 10px; font-size: 0.78rem; color: var(--c-text-s); }

/* ── 品牌墙 ── */
.brand-wall {
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: center;
}
.brand-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-s);
  padding: 14px 24px;
  font-size: 0.9rem; font-weight: 600; color: var(--c-text-m);
  transition: var(--trans);
}
.brand-item:hover { border-color: var(--c-primary); color: var(--c-primary); transform: translateY(-2px); }

/* ── How-To 步骤 ── */
.steps-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.step-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px 20px; text-align: center;
  transition: var(--trans);
}
.step-card:hover { border-color: var(--c-primary); transform: translateY(-4px); }
.step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-d));
  color: #fff; font-size: 1.2rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
}
.step-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--c-white); margin-bottom: 8px; }
.step-card p { font-size: 0.83rem; color: var(--c-text-m); line-height: 1.6; }

/* ── FAQ ── */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-s);
  overflow: hidden;
}
.faq-q {
  width: 100%; padding: 18px 20px;
  display: flex; align-items: center; justify-content: space-between;
  background: none; color: var(--c-white);
  font-size: 0.95rem; font-weight: 600; text-align: left;
  transition: var(--trans);
}
.faq-q:hover { color: var(--c-primary); }
.faq-q.open { color: var(--c-primary); border-bottom: 1px solid var(--c-border); }
.faq-icon { font-size: 1.2rem; transition: transform 0.3s; flex-shrink: 0; }
.faq-q.open .faq-icon { transform: rotate(45deg); }
.faq-a {
  padding: 0 20px; max-height: 0; overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  font-size: 0.88rem; color: var(--c-text-m); line-height: 1.8;
}
.faq-a.open { max-height: 400px; padding: 16px 20px; }

/* ── 用户评论 ── */
.review-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--trans);
}
.review-card:hover { border-color: var(--c-primary); transform: translateY(-3px); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-d));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}
.review-name { font-weight: 700; color: var(--c-white); font-size: 0.9rem; }
.review-role { font-size: 0.75rem; color: var(--c-text-s); }
.review-stars { color: var(--c-warn); font-size: 0.85rem; margin-bottom: 10px; }
.review-text { font-size: 0.85rem; color: var(--c-text-m); line-height: 1.7; }

/* ── 联系 ── */
.contact-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.contact-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px; text-align: center;
  transition: var(--trans);
}
.contact-card:hover { border-color: var(--c-primary); transform: translateY(-4px); }
.contact-icon { font-size: 2rem; margin-bottom: 12px; }
.contact-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--c-white); margin-bottom: 8px; }
.contact-card p { font-size: 0.85rem; color: var(--c-text-m); }

/* ── AI 赋能 ── */
.ai-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.ai-card {
  background: linear-gradient(135deg, var(--c-dark3), var(--c-card));
  border: 1px solid rgba(82,196,26,0.25);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--trans);
}
.ai-card:hover {
  border-color: var(--c-primary);
  box-shadow: 0 0 30px rgba(82,196,26,0.15);
  transform: translateY(-4px);
}
.ai-icon { font-size: 2rem; margin-bottom: 14px; }
.ai-card h3 { font-size: 1rem; font-weight: 700; color: var(--c-white); margin-bottom: 8px; }
.ai-card p { font-size: 0.87rem; color: var(--c-text-m); line-height: 1.7; }
.ai-badge {
  display: inline-block; margin-top: 12px;
  background: rgba(82,196,26,0.15); color: var(--c-primary);
  font-size: 0.72rem; padding: 3px 10px; border-radius: 4px;
  border: 1px solid rgba(82,196,26,0.3);
}

/* ── TikTok 短视频 ── */
.tiktok-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}
.tiktok-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden; cursor: pointer;
  transition: var(--trans);
}
.tiktok-card:hover {
  border-color: var(--c-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(82,196,26,0.2);
}
.tiktok-thumb {
  position: relative;
  aspect-ratio: 9/16; overflow: hidden;
}
.tiktok-thumb img { width: 100%; height: 100%; object-fit: cover; }
.tiktok-play {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.25); opacity: 0; transition: var(--trans);
}
.tiktok-card:hover .tiktok-play { opacity: 1; }
.tiktok-play-icon {
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(82,196,26,0.9);
  display: flex; align-items: center; justify-content: center;
}
.tiktok-body { padding: 10px; }
.tiktok-title { font-size: 0.8rem; font-weight: 600; color: var(--c-white); margin-bottom: 4px; line-height: 1.4; }
.tiktok-meta { font-size: 0.72rem; color: var(--c-text-s); }

/* ── 图片展示 ── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.gallery-item {
  border-radius: var(--radius-s); overflow: hidden;
  aspect-ratio: 4/3; cursor: pointer;
  transition: var(--trans);
}
.gallery-item:first-child { grid-column: span 2; aspect-ratio: 16/9; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.gallery-item:hover img { transform: scale(1.06); }

/* ── FOOTER ── */
.site-footer {
  background: var(--c-dark2);
  border-top: 1px solid var(--c-border);
  margin-top: 0;
}
.footer-main { padding: 56px 0 32px; }
.footer-grid {
  max-width: 1240px; margin: 0 auto; padding: 0 20px;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo img { border-radius: 50%; border: 2px solid var(--c-primary); }
.footer-logo span { font-size: 1.2rem; font-weight: 800; color: var(--c-primary); }
.footer-about { font-size: 0.85rem; color: var(--c-text-m); line-height: 1.7; margin-bottom: 20px; }
.footer-social { display: flex; gap: 8px; flex-wrap: wrap; }
.social-btn {
  padding: 6px 14px; border-radius: 20px;
  background: var(--c-dark3); color: var(--c-text-m);
  font-size: 0.8rem; border: 1px solid var(--c-border);
  transition: var(--trans);
}
.social-btn:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; color: var(--c-white); margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { font-size: 0.85rem; color: var(--c-text-m); }
.footer-col ul a:hover { color: var(--c-primary); }
.footer-contact li { font-size: 0.83rem; color: var(--c-text-m); margin-bottom: 6px; }
.footer-qrcodes { display: flex; gap: 16px; margin-top: 16px; }
.qr-item { text-align: center; }
.qr-placeholder {
  width: 80px; height: 80px;
  background: var(--c-dark3);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-s);
  display: flex; align-items: center; justify-content: center;
}
.qr-inner { text-align: center; }
.qr-inner span { display: block; font-size: 0.75rem; font-weight: 700; color: var(--c-primary); }
.qr-inner small { font-size: 0.6rem; color: var(--c-text-s); }
.qr-item p { font-size: 0.72rem; color: var(--c-text-s); margin-top: 6px; }
.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding: 20px 0;
}
.footer-bottom-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 20px;
  display: flex; flex-direction: column; gap: 6px; align-items: center;
  text-align: center;
}
.footer-bottom p { font-size: 0.8rem; color: var(--c-text-s); }
.footer-bottom a { color: var(--c-text-s); }
.footer-bottom a:hover { color: var(--c-primary); }
.footer-update { color: var(--c-text-s); font-size: 0.78rem; }

/* ── 模态框 ── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.85);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.modal-box {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 32px; max-width: 480px; width: 100%;
  position: relative;
}
.modal-video { max-width: 800px; padding: 20px; }
.modal-close {
  position: absolute; top: 12px; right: 16px;
  background: none; color: var(--c-text-s);
  font-size: 1.5rem; line-height: 1;
  transition: var(--trans);
}
.modal-close:hover { color: var(--c-danger); }
.modal-box h3 { font-size: 1.1rem; font-weight: 700; color: var(--c-white); margin-bottom: 20px; }
.share-btns { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.share-btn {
  flex: 1; min-width: 80px; padding: 12px;
  border-radius: var(--radius-s); font-size: 0.9rem; font-weight: 600;
  color: #fff; transition: var(--trans);
}
.share-btn.weixin { background: #07c160; }
.share-btn.weibo { background: #e6162d; }
.share-btn.douyin { background: #010101; border: 1px solid #333; }
.share-btn.bilibili { background: #00a1d6; }
.share-url { display: flex; gap: 8px; }
.share-url input {
  flex: 1; padding: 10px 14px;
  background: var(--c-dark3); border: 1px solid var(--c-border);
  border-radius: var(--radius-s); color: var(--c-text); font-size: 0.85rem;
}
.share-url button {
  padding: 10px 16px;
  background: var(--c-primary); color: #fff;
  border-radius: var(--radius-s); font-size: 0.85rem; font-weight: 600;
}
.video-player-wrap video { width: 100%; border-radius: var(--radius-s); }
.video-info { padding: 12px 0; font-size: 0.88rem; color: var(--c-text-m); }

/* ── Toast ── */
.search-toast {
  position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%);
  background: var(--c-dark3); color: var(--c-text);
  padding: 12px 24px; border-radius: 24px;
  border: 1px solid var(--c-border);
  font-size: 0.9rem; z-index: 3000;
  box-shadow: var(--shadow);
  animation: fadeInUp 0.3s ease;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── 面包屑 ── */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.83rem; color: var(--c-text-s);
  display: flex; align-items: center; gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--c-text-s); }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb span { color: var(--c-text-s); }
.breadcrumb .current { color: var(--c-text-m); }

/* ── 页面标题 ── */
.page-hero {
  background: linear-gradient(135deg, var(--c-dark2), var(--c-dark3));
  border-bottom: 1px solid var(--c-border);
  padding: 48px 0 32px;
}
.page-hero h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800; color: var(--c-white); margin-bottom: 8px;
}
.page-hero h1 span { color: var(--c-primary); }
.page-hero p { font-size: 1rem; color: var(--c-text-m); }

/* ── 内页内容 ── */
.inner-content { max-width: 900px; }
.inner-content h2 { font-size: 1.3rem; font-weight: 700; color: var(--c-white); margin: 28px 0 12px; }
.inner-content h2 span { color: var(--c-primary); }
.inner-content p { font-size: 0.9rem; color: var(--c-text-m); line-height: 1.8; margin-bottom: 14px; }
.inner-content ul { padding-left: 20px; margin-bottom: 14px; }
.inner-content ul li { font-size: 0.9rem; color: var(--c-text-m); line-height: 1.8; list-style: disc; }

/* ── 响应式 ── */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
  .hero-banner { min-height: 420px; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); max-width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .gallery-item:first-child { grid-column: span 2; }
  .section { padding: 48px 0; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
  .tiktok-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}
@media (max-width: 480px) {
  .hero-btns { flex-direction: column; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item:first-child { grid-column: span 1; }
  .search-form { border-radius: 12px; }
}