/* =====================================================
   17C 官方网站 - 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-cream:       #FAF7F2;
  --color-white:       #FFFFFF;
  --color-mocha:       #6B4F3A;
  --color-taupe:       #8B7355;
  --color-taupe-light: #C4A882;
  --color-fog-blue:    #8FA8B8;
  --color-apricot:     #F0E0C8;
  --color-bean-pink:   #D4A5A5;
  --color-text:        #3D3530;
  --color-text-light:  #7A6E68;
  --color-border:      #E8DDD5;
  --color-shadow:      rgba(107,79,58,0.08);

  --font-body:    'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
  --font-display: 'Georgia','Times New Roman',serif;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  32px;

  --shadow-card:   0 4px 24px rgba(107,79,58,0.09);
  --shadow-hover:  0 12px 40px rgba(107,79,58,0.16);
  --shadow-header: 0 2px 16px rgba(107,79,58,0.08);

  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --container:  1200px;
}

/* ---------- 重置 ---------- */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; font-size:16px; }
body {
  font-family: var(--font-body);
  background: var(--color-cream);
  color: var(--color-text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width:100%; height:auto; display:block; }
ul,ol { list-style:none; }

/* ---------- 容器 ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(250,247,242,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}
.logo-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-mocha);
  letter-spacing: 0.06em;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.site-nav a {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--color-text-light);
  transition: all var(--transition);
  white-space: nowrap;
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--color-mocha);
  background: var(--color-apricot);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-mocha);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---------- 搜索栏 ---------- */
.search-bar-wrap {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 0;
}
.search-bar-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  display: flex;
  align-items: center;
}
.search-bar-inner input {
  width: 100%;
  padding: 10px 44px 10px 18px;
  border: 1.5px solid var(--color-border);
  border-radius: 24px;
  background: var(--color-cream);
  font-size: 0.88rem;
  color: var(--color-text);
  outline: none;
  font-family: var(--font-body);
  transition: border-color var(--transition);
}
.search-bar-inner input:focus {
  border-color: var(--color-taupe-light);
  background: var(--color-white);
}
.search-icon {
  position: absolute;
  right: 36px;
  font-size: 1rem;
  color: var(--color-taupe);
  pointer-events: none;
}

/* ---------- 首屏Banner ---------- */
.hero-section {
  position: relative;
  height: 88vh;
  min-height: 560px;
  max-height: 900px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.72) saturate(0.85);
  transform: scale(1.04);
  transition: transform 8s ease;
}
.hero-section:hover .hero-bg { transform: scale(1.0); }
.hero-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(250,247,242,0.08) 0%,
    rgba(61,53,48,0.35) 60%,
    rgba(61,53,48,0.65) 100%
  );
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #FAF7F2;
  padding: 0 24px;
  max-width: 760px;
}
.hero-eyebrow {
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.82;
  margin-bottom: 16px;
  font-weight: 400;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 18px;
  text-shadow: 0 2px 16px rgba(0,0,0,0.25);
}
.hero-subtitle {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  opacity: 0.88;
  margin-bottom: 36px;
  letter-spacing: 0.06em;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- 粒子动画 ---------- */
.particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}
.particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(250,247,242,0.6);
  animation: particleFloat linear infinite;
}
@keyframes particleFloat {
  0%   { transform: translateY(0) scale(1); opacity: 0.3; }
  50%  { transform: translateY(-40px) scale(1.1); opacity: 0.6; }
  100% { transform: translateY(0) scale(1); opacity: 0.3; }
}

/* ---------- 按钮 ---------- */
.btn-primary {
  display: inline-block;
  padding: 13px 32px;
  background: var(--color-mocha);
  color: #FAF7F2;
  border-radius: 32px;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: all var(--transition);
  border: 2px solid var(--color-mocha);
}
.btn-primary:hover {
  background: var(--color-taupe);
  border-color: var(--color-taupe);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(107,79,58,0.25);
}
.btn-outline {
  display: inline-block;
  padding: 13px 32px;
  background: transparent;
  color: #FAF7F2;
  border: 2px solid rgba(250,247,242,0.7);
  border-radius: 32px;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: all var(--transition);
}
.btn-outline:hover {
  background: rgba(250,247,242,0.15);
  border-color: #FAF7F2;
  transform: translateY(-2px);
}
.section .btn-outline {
  color: var(--color-mocha);
  border-color: var(--color-mocha);
}
.section .btn-outline:hover {
  background: var(--color-mocha);
  color: #FAF7F2;
}

/* ---------- 通用Section ---------- */
.section {
  padding: 80px 0;
}
.section-alt {
  background: var(--color-white);
}
.section-apricot {
  background: var(--color-apricot);
}
.section-header {
  text-align: center;
  margin-bottom: 52px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-taupe);
  margin-bottom: 14px;
  font-weight: 500;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--color-mocha);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}
.divider {
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-taupe-light), var(--color-bean-pink));
  margin: 0 auto 20px;
  border-radius: 2px;
}
.section-desc {
  max-width: 640px;
  margin: 0 auto;
  color: var(--color-text-light);
  font-size: 0.92rem;
  line-height: 1.85;
}

/* ---------- 淡入动画 ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 视频卡片 ---------- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}
.video-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .video-thumb img {
  transform: scale(1.06);
}
.video-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(107,79,58,0.85);
  color: #FAF7F2;
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.06em;
  backdrop-filter: blur(4px);
}
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
  background: rgba(61,53,48,0.28);
}
.video-play-btn::after {
  content: '';
  width: 56px;
  height: 56px;
  background: rgba(250,247,242,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%236B4F3A'%3E%3Cpath d='M8 5v14l11-7z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 28px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: transform var(--transition);
}
.video-card:hover .video-play-btn {
  opacity: 1;
}
.video-card:hover .video-play-btn::after {
  transform: scale(1.1);
}
.video-info {
  padding: 18px 20px 20px;
}
.video-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 10px;
  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);
}
.tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 0.72rem;
  color: var(--color-taupe);
  margin-right: 6px;
  margin-top: 2px;
}

/* ---------- 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-card);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.story-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}
.story-card-img {
  overflow: hidden;
  aspect-ratio: 4/3;
}
.story-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.story-card:hover .story-card-img img {
  transform: scale(1.05);
}
.story-card-body {
  padding: 20px 22px 12px;
  flex: 1;
}
.story-category {
  font-size: 0.75rem;
  color: var(--color-taupe);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  font-weight: 500;
}
.story-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 10px;
}
.story-excerpt {
  font-size: 0.84rem;
  color: var(--color-text-light);
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.story-footer {
  padding: 12px 22px 18px;
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--color-text-light);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

/* ---------- 影像画廊 ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  aspect-ratio: 4/3;
  cursor: pointer;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(61,53,48,0.7) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  opacity: 0;
  transition: opacity var(--transition);
}
.gallery-item:hover .gallery-item-overlay { opacity: 1; }
.gallery-item-overlay span {
  color: #FAF7F2;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}

/* ---------- AI 模块 ---------- */
.ai-section-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.ai-text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  color: var(--color-mocha);
  margin: 14px 0 18px;
  line-height: 1.35;
}
.ai-text p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  line-height: 1.85;
  margin-bottom: 12px;
}
.ai-features {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.ai-feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.ai-feature-icon {
  width: 44px;
  height: 44px;
  background: var(--color-apricot);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.ai-feature-text h4 {
  font-size: 0.9rem;
  color: var(--color-mocha);
  font-weight: 600;
  margin-bottom: 4px;
}
.ai-feature-text p {
  font-size: 0.82rem;
  color: var(--color-text-light);
  margin: 0;
}
.ai-image-wrap img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-hover);
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

/* ---------- 创作者卡片 ---------- */
.creators-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.creator-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}
.creator-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}
.creator-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 16px;
  border: 3px solid var(--color-apricot);
}
.creator-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.creator-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-mocha);
  margin-bottom: 4px;
}
.creator-role {
  font-size: 0.78rem;
  color: var(--color-taupe);
  margin-bottom: 10px;
  letter-spacing: 0.06em;
}
.creator-desc {
  font-size: 0.82rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}
.creator-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}
.creator-stat {
  text-align: center;
}
.creator-stat strong {
  display: block;
  font-size: 1rem;
  color: var(--color-mocha);
  font-weight: 700;
}
.creator-stat span {
  font-size: 0.72rem;
  color: var(--color-text-light);
}

/* ---------- 用户评价 ---------- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}
.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.review-stars {
  color: var(--color-taupe-light);
  font-size: 0.9rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.review-text {
  font-size: 0.86rem;
  color: var(--color-text);
  line-height: 1.85;
  margin-bottom: 16px;
  font-style: italic;
}
.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}
.review-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-apricot);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-mocha);
  flex-shrink: 0;
}
.review-user-info strong {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text);
}
.review-user-info span {
  font-size: 0.75rem;
  color: var(--color-text-light);
}

/* ---------- 合作伙伴 ---------- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 40px;
}
.partner-logo {
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-light);
  transition: all var(--transition);
}
.partner-logo:hover {
  border-color: var(--color-taupe-light);
  color: var(--color-mocha);
  box-shadow: var(--shadow-card);
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 4px;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--transition);
  gap: 12px;
}
.faq-question:hover { color: var(--color-mocha); }
.faq-icon {
  font-size: 1.2rem;
  color: var(--color-taupe);
  transition: transform 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;
  font-size: 0.86rem;
  color: var(--color-text-light);
  line-height: 1.85;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 4px 18px;
}

/* ---------- 联系模块 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}
.contact-item {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: center;
  box-shadow: var(--shadow-card);
}
.contact-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}
.contact-item h3 {
  font-size: 1rem;
  color: var(--color-mocha);
  font-weight: 700;
  margin-bottom: 12px;
}
.contact-item p {
  font-size: 0.84rem;
  color: var(--color-text-light);
  line-height: 1.8;
}
.qr-placeholder {
  width: 100px;
  height: 100px;
  background: var(--color-cream);
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  color: var(--color-text-light);
  text-align: center;
  line-height: 1.5;
  margin: 16px auto 0;
}

/* ---------- 内页 Hero ---------- */
.inner-hero {
  background: linear-gradient(135deg, var(--color-apricot) 0%, var(--color-cream) 100%);
  padding: 52px 0 44px;
  border-bottom: 1px solid var(--color-border);
}
.inner-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--color-mocha);
  margin: 12px 0 14px;
  line-height: 1.3;
}
.inner-hero p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  max-width: 600px;
  line-height: 1.85;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-bottom: 12px;
}
.breadcrumb a { color: var(--color-taupe); }
.breadcrumb a:hover { color: var(--color-mocha); }
.breadcrumb span { color: var(--color-text-light); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--color-mocha);
  color: rgba(250,247,242,0.85);
  padding: 56px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(250,247,242,0.12);
}
.footer-brand .logo-text {
  color: #FAF7F2;
  font-size: 1.6rem;
  display: block;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.82rem;
  line-height: 1.8;
  opacity: 0.72;
}
.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: #FAF7F2;
  margin-bottom: 16px;
  letter-spacing: 0.06em;
}
.footer-col a {
  display: block;
  font-size: 0.82rem;
  opacity: 0.65;
  margin-bottom: 10px;
  transition: opacity var(--transition);
}
.footer-col a:hover { opacity: 1; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 0.78rem;
  opacity: 0.6;
  flex-wrap: wrap;
  gap: 12px;
}
.update-time { font-size: 0.75rem; }
.footer-social {
  display: flex;
  gap: 10px;
}
.footer-social a {
  width: 32px;
  height: 32px;
  background: rgba(250,247,242,0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  transition: background var(--transition);
}
.footer-social a:hover { background: rgba(250,247,242,0.25); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .ai-section-inner { grid-template-columns: 1fr; gap: 36px; }
  .ai-image-wrap { max-width: 480px; margin: 0 auto; }
}
@media (max-width: 768px) {
  .site-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(250,247,242,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 20px 24px 28px;
    border-bottom: 1px solid var(--color-border);
    gap: 4px;
    z-index: 999;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 16px; font-size: 0.95rem; }
  .nav-toggle { display: flex; }
  .hero-section { height: 70vh; min-height: 480px; }
  .hero-title { font-size: 1.8rem; }
  .section { padding: 56px 0; }
  .video-grid { grid-template-columns: 1fr; }
  .story-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .creators-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 1.5rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .gallery-grid { grid-template-columns: 1fr; }
  .creators-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 打印 ---------- */
@media print {
  .site-header, .search-bar-wrap, .particles, .nav-toggle { display: none; }
  .hero-section { height: auto; padding: 40px 0; }
  .hero-bg { display: none; }
  .hero-content { color: var(--color-text); }
}