/* =====================================================
   糖心Vlog 官网主样式文件
   风格：高端优雅·轻奢简约·温暖治愈
   色系：浅米白 + 莫兰迪（奶茶棕、雾蓝、浅杏、豆沙粉）
   ===================================================== */

/* ---- CSS变量 ---- */
:root {
  --color-white:       #faf8f5;
  --color-cream:       #f5f0e8;
  --color-beige:       #ede8de;
  --color-brown:       #9c7c5c;
  --color-brown-dark:  #3a3028;
  --color-brown-mid:   #6b5040;
  --color-fog-blue:    #8fa8b8;
  --color-apricot:     #e8c8a8;
  --color-bean-pink:   #c89898;
  --color-text:        #3a3028;
  --color-text-sub:    #7a6858;
  --color-text-light:  #b0a090;
  --color-border:      rgba(156,124,92,0.15);
  --font-main:         'PingFang SC','Hiragino Sans GB','Microsoft YaHei','SimSun',sans-serif;
  --font-display:      'PingFang SC','STSong','SimSun',serif;
  --radius-sm:         8px;
  --radius-md:         12px;
  --radius-lg:         20px;
  --radius-xl:         32px;
  --shadow-sm:         0 2px 12px rgba(58,48,40,0.06);
  --shadow-md:         0 8px 32px rgba(58,48,40,0.10);
  --shadow-lg:         0 20px 60px rgba(58,48,40,0.14);
  --transition:        all 0.35s cubic-bezier(0.4,0,0.2,1);
  --max-width:         1280px;
}

/* ---- 重置 ---- */
*, *::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(--color-white);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; outline: none; }
h1,h2,h3,h4,h5 { font-family: var(--font-display); line-height: 1.35; }

/* ---- 动画 ---- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes breathe {
  0%,100% { transform: scale(1); opacity: 0.6; }
  50%      { transform: scale(1.15); opacity: 1; }
}
@keyframes float {
  0%,100% { transform: translateY(0) rotate(0deg); opacity: 0.4; }
  50%      { transform: translateY(-40px) rotate(180deg); opacity: 0.8; }
}
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* ---- 粒子 ---- */
.particles { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 1; }
.particle {
  position: absolute;
  border-radius: 50%;
  animation: float linear infinite;
}

/* ---- 滚动显示 ---- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- 顶部导航 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250,248,245,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 16px rgba(58,48,40,0.05);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-brown-dark);
  white-space: nowrap;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-apricot), var(--color-bean-pink));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
  animation: breathe 3s ease-in-out infinite;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: flex-end;
  flex-wrap: wrap;
}
.site-nav a {
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.88rem;
  color: var(--color-text-sub);
  white-space: nowrap;
  transition: var(--transition);
}
.site-nav a:hover,
.site-nav a.active {
  background: var(--color-cream);
  color: var(--color-brown);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-brown);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- 搜索栏 ---- */
.search-bar-wrap {
  background: var(--color-cream);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 24px;
}
.search-bar-inner {
  max-width: 600px;
  margin: 0 auto;
}
#search-form {
  display: flex;
  align-items: center;
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: 50px;
  overflow: hidden;
  transition: var(--transition);
}
#search-form:focus-within {
  border-color: var(--color-brown);
  box-shadow: 0 0 0 3px rgba(156,124,92,0.12);
}
#search-input {
  flex: 1;
  padding: 10px 20px;
  border: none;
  background: none;
  font-size: 0.9rem;
  color: var(--color-text);
  outline: none;
  font-family: inherit;
}
#search-input::placeholder { color: var(--color-text-light); }
.search-btn {
  padding: 10px 18px;
  background: var(--color-brown);
  color: #fff;
  font-size: 1rem;
  border-radius: 0 50px 50px 0;
  transition: var(--transition);
}
.search-btn:hover { background: var(--color-brown-mid); }

/* ---- Hero Banner ---- */
.hero-banner {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  transition: transform 8s ease;
}
.hero-banner:hover .hero-bg { transform: scale(1); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(58,48,40,0.55) 0%,
    rgba(143,168,184,0.25) 100%
  );
  z-index: 2;
}
.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: #fff;
  padding: 40px 24px;
  max-width: 800px;
  animation: fadeIn 1s ease;
}
.hero-tag {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 50px;
  font-size: 0.82rem;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
  letter-spacing: 0.05em;
}
.hero-title {
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hero-subtitle {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: rgba(255,255,255,0.85);
  margin-bottom: 36px;
  line-height: 1.8;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- 按钮 ---- */
.btn-primary {
  display: inline-block;
  padding: 13px 32px;
  background: linear-gradient(135deg, var(--color-brown), var(--color-bean-pink));
  color: #fff;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 500;
  box-shadow: 0 4px 20px rgba(156,124,92,0.35);
  transition: var(--transition);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(156,124,92,0.45);
}
.btn-outline {
  display: inline-block;
  padding: 12px 30px;
  border: 1.5px solid rgba(255,255,255,0.6);
  color: #fff;
  border-radius: 50px;
  font-size: 0.95rem;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.9);
}
/* 浅色背景下的outline按钮 */
.section .btn-outline {
  border-color: var(--color-brown);
  color: var(--color-brown);
}
.section .btn-outline:hover {
  background: var(--color-brown);
  color: #fff;
}

/* ---- Section通用 ---- */
.section { padding: 80px 0; }
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  padding: 5px 16px;
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.78rem;
  color: var(--color-brown);
  margin-bottom: 14px;
  letter-spacing: 0.06em;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--color-brown-dark);
  margin-bottom: 14px;
}
.section-desc {
  font-size: 0.95rem;
  color: var(--color-text-sub);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid var(--color-border);
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--color-beige);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s 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(58,48,40,0);
  transition: var(--transition);
}
.video-card:hover .video-play-btn {
  background: rgba(58,48,40,0.35);
}
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.7);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--color-brown);
  margin-left: 4px;
}
.video-card:hover .play-icon {
  opacity: 1;
  transform: scale(1);
}
.video-glow {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(to top, rgba(58,48,40,0.5), transparent);
  pointer-events: none;
}
.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 3px 10px;
  background: rgba(156,124,92,0.85);
  color: #fff;
  border-radius: 50px;
  font-size: 0.72rem;
  backdrop-filter: blur(4px);
}
.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  padding: 2px 8px;
  background: rgba(0,0,0,0.55);
  color: #fff;
  border-radius: 4px;
  font-size: 0.72rem;
}
.video-info {
  padding: 16px 18px;
}
.video-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-brown-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;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--color-text-light);
}

/* ---- 故事卡片 ---- */
.story-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}
.story-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}
.story-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}
.story-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.story-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.story-card:hover .story-img img { transform: scale(1.05); }
.story-body { padding: 20px; }
.story-cat {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-cream);
  color: var(--color-brown);
  border-radius: 50px;
  font-size: 0.72rem;
  margin-bottom: 10px;
}
.story-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-brown-dark);
  margin-bottom: 10px;
  line-height: 1.5;
}
.story-excerpt {
  font-size: 0.83rem;
  color: var(--color-text-sub);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.story-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--color-text-light);
}
.story-author { display: flex; align-items: center; gap: 8px; }

/* ---- 图片墙 ---- */
.image-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.image-wall-item {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: var(--radius-md);
  cursor: pointer;
}
.image-wall-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.image-wall-item:hover img { transform: scale(1.08); }
.image-wall-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(58,48,40,0.6), transparent);
  opacity: 0;
  transition: var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 12px;
}
.image-wall-item:hover .image-wall-overlay { opacity: 1; }
.image-wall-label {
  font-size: 0.78rem;
  color: #fff;
}

/* ---- AI模块 ---- */
.ai-section { background: linear-gradient(135deg, var(--color-cream) 0%, rgba(143,168,184,0.12) 100%); }
.ai-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.ai-visual {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.ai-visual img { width: 100%; height: 100%; object-fit: cover; }
.ai-features { display: flex; flex-direction: column; gap: 20px; }
.ai-feature { display: flex; gap: 16px; align-items: flex-start; }
.ai-feature-icon {
  width: 44px;
  height: 44px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}
.ai-feature-text h4 {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-brown-dark);
  margin-bottom: 4px;
}
.ai-feature-text p {
  font-size: 0.83rem;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ---- 达人卡片 ---- */
.creator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}
.creator-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.creator-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}
.creator-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--color-apricot);
}
.creator-name { font-size: 1.05rem; font-weight: 700; color: var(--color-brown-dark); margin-bottom: 4px; }
.creator-role { font-size: 0.78rem; color: var(--color-brown); margin-bottom: 12px; }
.creator-desc { font-size: 0.82rem; color: var(--color-text-sub); line-height: 1.7; margin-bottom: 16px; }
.creator-stats { display: flex; justify-content: center; gap: 24px; }
.creator-stat { text-align: center; }
.creator-stat .num { display: block; font-size: 1rem; font-weight: 700; color: var(--color-brown-dark); }
.creator-stat .label { font-size: 0.72rem; color: var(--color-text-light); }

/* ---- 评价卡片 ---- */
.reviews-section { background: var(--color-cream); }
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.review-stars { color: #e8a840; font-size: 0.9rem; margin-bottom: 12px; }
.review-text { font-size: 0.85rem; color: var(--color-text-sub); line-height: 1.8; margin-bottom: 16px; }
.review-user { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-apricot), var(--color-bean-pink));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: #fff;
  font-weight: 600;
  flex-shrink: 0;
}
.review-name { font-size: 0.85rem; font-weight: 600; color: var(--color-brown-dark); }
.review-date { font-size: 0.72rem; color: var(--color-text-light); }

/* ---- 合作伙伴 ---- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}
.partner-logo {
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-sub);
  transition: var(--transition);
}
.partner-logo:hover {
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  color: var(--color-brown);
}

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  background: var(--color-white);
}
.faq-question {
  width: 100%;
  padding: 18px 20px;
  text-align: left;
  background: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-brown-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: var(--transition);
  font-family: inherit;
}
.faq-question:hover { background: var(--color-cream); }
.faq-icon {
  font-size: 1.2rem;
  color: var(--color-brown);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner {
  padding: 0 20px 18px;
  font-size: 0.88rem;
  color: var(--color-text-sub);
  line-height: 1.8;
}

/* ---- 联系模块 ---- */
.contact-section { background: var(--color-cream); }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.contact-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}
.contact-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-brown-dark);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.85rem;
  color: var(--color-text-sub);
}
.contact-icon { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }
.qr-placeholder {
  width: 140px;
  height: 140px;
  background: var(--color-cream);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  color: var(--color-text-light);
  text-align: center;
  line-height: 1.6;
}

/* ---- 标签云 ---- */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 5px 14px;
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--color-text-sub);
  cursor: pointer;
  transition: var(--transition);
  background: var(--color-white);
}
.tag:hover, .tag.active {
  background: var(--color-brown);
  color: #fff;
  border-color: var(--color-brown);
}

/* ---- 面包屑 ---- */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 24px;
  font-size: 0.82rem;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb a { color: var(--color-brown); }
.breadcrumb a:hover { text-decoration: underline; }

/* ---- 页面Hero（内页） ---- */
.page-hero {
  background: linear-gradient(135deg, var(--color-cream) 0%, var(--color-beige) 100%);
  padding: 60px 24px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}
.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--color-brown-dark);
  margin: 12px 0;
}
.page-hero p {
  font-size: 0.95rem;
  color: var(--color-text-sub);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---- 分页 ---- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}
.page-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1.5px solid var(--color-border);
  background: var(--color-white);
  font-size: 0.88rem;
  color: var(--color-text-sub);
  transition: var(--transition);
}
.page-btn:hover, .page-btn.active {
  background: var(--color-brown);
  color: #fff;
  border-color: var(--color-brown);
}

/* ---- 页脚 ---- */
.site-footer {
  background: var(--color-brown-dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.83rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.5);
}
.footer-col h4 {
  font-size: 0.88rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: rgba(255,255,255,0.85); }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
}
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--color-brown);
  color: #fff;
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .ai-inner { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(250,248,245,0.98);
    backdrop-filter: blur(16px);
    padding: 20px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    z-index: 99;
  }
  .site-nav.open { display: flex; }
  .site-nav a { width: 100%; padding: 12px 16px; border-radius: var(--radius-md); }
  .nav-toggle { display: flex; }
  .hero-banner { min-height: 60vh; }
  .section { padding: 56px 0; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .video-grid { grid-template-columns: 1fr; }
  .story-grid { grid-template-columns: 1fr; }
  .creator-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .header-inner { padding: 0 16px; gap: 16px; }
  .section-inner { padding: 0 16px; }
  .hero-content { padding: 24px 16px; }
  .hero-btns { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; max-width: 280px; text-align: center; }
}

/* ---- 懒加载占位 ---- */
img.lazy-img {
  background: linear-gradient(90deg, var(--color-beige) 25%, var(--color-cream) 50%, var(--color-beige) 75%);
  background-size: 200% auto;
  animation: shimmer 1.5s linear infinite;
}