/* ============================================================
   蘑菇视频 · 复古摄影美学官网主样式
   Vintage Photography Aesthetic - Main Stylesheet
   ============================================================ */

/* --- 字体引入 --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;500;600;700&display=swap');

/* --- CSS变量 --- */
:root {
  --cream: #f5f0e8;
  --beige: #e8dcc8;
  --warm-brown: #8b6914;
  --dark-brown: #3d2b1f;
  --deep-brown: #1a0f08;
  --warm-orange: #c8783a;
  --dark-red: #7a2e1a;
  --light-gray: #d4cfc8;
  --text-main: #2c1f14;
  --text-muted: #7a6a58;
  --text-light: #b0a090;
  --border-color: #c8b898;
  --shadow: rgba(61, 43, 31, 0.15);
  --film-grain: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.08'/%3E%3C/svg%3E");
}

/* --- 全局重置 --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  background-color: var(--cream);
  color: var(--text-main);
  line-height: 1.8;
  overflow-x: hidden;
}

/* 胶片颗粒全局纹理叠加 */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: var(--film-grain);
  pointer-events: none;
  z-index: 9999;
  opacity: 0.04;
}

a { color: var(--warm-brown); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--dark-red); }

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ============================================================
   顶部导航
   ============================================================ */
.site-header {
  background: var(--deep-brown);
  border-bottom: 2px solid var(--warm-brown);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--cream);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 2px;
}

.site-logo .logo-icon {
  width: 42px; height: 42px;
  background: var(--warm-brown);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  border: 2px solid var(--beige);
}

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

.main-nav a {
  color: var(--beige);
  padding: 8px 14px;
  font-size: 0.9rem;
  letter-spacing: 1px;
  border-bottom: 2px solid transparent;
  transition: all 0.3s;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--warm-orange);
  border-bottom-color: var(--warm-orange);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--beige);
  color: var(--beige);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 1.2rem;
  border-radius: 3px;
}

/* ============================================================
   搜索框（仅UI，JS控制）
   ============================================================ */
.search-bar-wrap {
  background: var(--dark-brown);
  padding: 10px 0;
  border-bottom: 1px solid var(--warm-brown);
}

.search-bar-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  gap: 8px;
}

.search-input {
  flex: 1;
  padding: 9px 16px;
  background: rgba(245,240,232,0.1);
  border: 1px solid var(--warm-brown);
  border-radius: 20px;
  color: var(--cream);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.3s;
}

.search-input::placeholder { color: var(--text-light); }
.search-input:focus { border-color: var(--warm-orange); }

.search-btn {
  padding: 9px 20px;
  background: var(--warm-brown);
  border: none;
  border-radius: 20px;
  color: var(--cream);
  cursor: pointer;
  font-size: 0.85rem;
  font-family: inherit;
  transition: background 0.3s;
}

.search-btn:hover { background: var(--warm-orange); }

/* ============================================================
   首屏Banner
   ============================================================ */
.hero-banner {
  position: relative;
  height: 88vh;
  min-height: 520px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: sepia(0.4) brightness(0.7);
  transform: scale(1.05);
  transition: transform 8s ease;
}

.hero-banner:hover .hero-bg { transform: scale(1.0); }

/* 胶片边框效果 */
.hero-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,0.5) 0%, transparent 8%, transparent 92%, rgba(0,0,0,0.5) 100%),
              linear-gradient(to bottom, rgba(0,0,0,0.3) 0%, transparent 12%, transparent 88%, rgba(0,0,0,0.4) 100%);
  z-index: 2;
  pointer-events: none;
}

/* 暗角效果 */
.hero-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(0,0,0,0.6) 100%);
  z-index: 2;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: var(--cream);
  padding: 0 20px;
  max-width: 800px;
}

.hero-tag {
  display: inline-block;
  background: rgba(200,120,58,0.8);
  color: var(--cream);
  padding: 4px 14px;
  font-size: 0.78rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 18px;
  border: 1px solid rgba(245,240,232,0.4);
}

.hero-title {
  font-size: clamp(2rem, 6vw, 3.8rem);
  font-weight: 700;
  line-height: 1.2;
  text-shadow: 2px 2px 8px rgba(0,0,0,0.6);
  margin-bottom: 16px;
  letter-spacing: 4px;
}

.hero-subtitle {
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  font-weight: 300;
  letter-spacing: 2px;
  opacity: 0.9;
  margin-bottom: 32px;
  text-shadow: 1px 1px 4px rgba(0,0,0,0.5);
}

.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn-primary {
  padding: 12px 32px;
  background: var(--warm-brown);
  color: var(--cream);
  border: 2px solid var(--warm-brown);
  font-family: inherit;
  font-size: 0.95rem;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  display: inline-block;
}

.btn-primary:hover {
  background: transparent;
  color: var(--cream);
  border-color: var(--cream);
}

.btn-outline {
  padding: 12px 32px;
  background: transparent;
  color: var(--cream);
  border: 2px solid rgba(245,240,232,0.7);
  font-family: inherit;
  font-size: 0.95rem;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  display: inline-block;
}

.btn-outline:hover {
  background: rgba(245,240,232,0.15);
  color: var(--cream);
  border-color: var(--cream);
}

/* ============================================================
   通用区块样式
   ============================================================ */
.section { padding: 72px 0; }
.section-alt { background: var(--beige); }
.section-dark { background: var(--dark-brown); color: var(--cream); }

.section-header { text-align: center; margin-bottom: 48px; }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--warm-brown);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--warm-brown);
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 600;
  color: var(--dark-brown);
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section-dark .section-title { color: var(--cream); }

.section-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.9;
}

.section-dark .section-desc { color: var(--light-gray); }

/* 分隔线装饰 */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 12px auto 0;
  max-width: 200px;
  justify-content: center;
}

.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.divider-icon { color: var(--warm-brown); font-size: 0.8rem; }

/* ============================================================
   视频卡片（Video Cards）
   ============================================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.video-card {
  background: var(--deep-brown);
  border: 1px solid var(--warm-brown);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
}

.video-thumb {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
  overflow: hidden;
  background: var(--dark-brown);
}

.video-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: sepia(0.3) brightness(0.85);
  transition: filter 0.4s;
}

/* 胶片颗粒悬停效果 */
.video-thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: var(--film-grain);
  opacity: 0;
  z-index: 2;
  transition: opacity 0.3s;
  pointer-events: none;
}

/* 暗角效果 */
.video-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,0.55) 100%);
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
}

.video-card:hover .video-thumb::before { opacity: 1; }
.video-card:hover .video-thumb::after { opacity: 1; }
.video-card:hover .video-thumb img { filter: sepia(0.5) brightness(0.75); }

/* 播放按钮 */
.play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 56px; height: 56px;
  background: rgba(200,120,58,0.85);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  z-index: 3;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  border: 2px solid rgba(245,240,232,0.8);
}

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

.video-card:hover .play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* 视频时长标签 */
.video-duration {
  position: absolute;
  bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.7);
  color: var(--cream);
  font-size: 0.75rem;
  padding: 2px 7px;
  z-index: 3;
  letter-spacing: 1px;
}

/* 视频卡片信息区 */
.video-info {
  padding: 14px 16px 16px;
  border-top: 1px solid rgba(200,120,58,0.3);
}

.video-title {
  font-size: 0.95rem;
  color: var(--cream);
  font-weight: 500;
  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(--text-light);
}

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

/* ============================================================
   图片卡片（Photo Cards）
   ============================================================ */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.photo-card {
  position: relative;
  overflow: hidden;
  background: var(--dark-brown);
  border: 1px solid var(--border-color);
  transition: transform 0.3s, box-shadow 0.3s;
}

.photo-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px var(--shadow);
}

.photo-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  filter: sepia(0.25) brightness(0.9);
  transition: filter 0.4s, transform 0.4s;
}

.photo-card:hover img {
  filter: sepia(0.45) brightness(0.8);
  transform: scale(1.04);
}

.photo-card-body {
  padding: 14px 16px;
  background: var(--dark-brown);
  color: var(--cream);
}

.photo-card-title {
  font-size: 0.92rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--beige);
}

.photo-card-meta {
  font-size: 0.78rem;
  color: var(--text-light);
  display: flex;
  gap: 12px;
}

/* ============================================================
   品牌故事模块
   ============================================================ */
.story-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.story-block.reverse { direction: rtl; }
.story-block.reverse > * { direction: ltr; }

.story-img-wrap {
  position: relative;
}

.story-img-wrap img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  filter: sepia(0.3) brightness(0.88);
  border: 3px solid var(--warm-brown);
}

/* 老照片光晕效果 */
.story-img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(61,43,31,0.35) 100%);
  pointer-events: none;
}

.story-text h3 {
  font-size: 1.6rem;
  color: var(--dark-brown);
  margin-bottom: 16px;
  letter-spacing: 2px;
  line-height: 1.4;
}

.story-text p {
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 14px;
  font-size: 0.95rem;
}

.story-text .btn-primary { margin-top: 8px; }

/* ============================================================
   摄影师达人模块
   ============================================================ */
.photographer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}

.photographer-card {
  text-align: center;
  padding: 24px 16px;
  background: var(--cream);
  border: 1px solid var(--border-color);
  transition: transform 0.3s, box-shadow 0.3s;
}

.photographer-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow);
}

.photographer-avatar {
  width: 90px; height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--warm-brown);
  filter: sepia(0.2);
}

.photographer-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--dark-brown);
  margin-bottom: 4px;
}

.photographer-role {
  font-size: 0.8rem;
  color: var(--warm-brown);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.photographer-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================================
   用户评价模块
   ============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.review-card {
  background: var(--cream);
  border: 1px solid var(--border-color);
  padding: 22px 20px;
  position: relative;
  transition: box-shadow 0.3s;
}

.review-card:hover { box-shadow: 0 6px 20px var(--shadow); }

.review-card::before {
  content: '\201C';
  position: absolute;
  top: 12px; left: 16px;
  font-size: 3rem;
  color: var(--warm-brown);
  opacity: 0.25;
  font-family: Georgia, serif;
  line-height: 1;
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 16px;
  padding-top: 8px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--warm-brown);
  display: flex; align-items: center; justify-content: center;
  color: var(--cream);
  font-size: 0.85rem;
  font-weight: 600;
  flex-shrink: 0;
}

.review-author-info .name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--dark-brown);
}

.review-author-info .location {
  font-size: 0.76rem;
  color: var(--text-light);
}

.review-stars {
  color: var(--warm-orange);
  font-size: 0.75rem;
  margin-top: 2px;
}

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

.faq-item {
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 18px 0;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--dark-brown);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: color 0.3s;
}

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

.faq-icon {
  width: 22px; height: 22px;
  border: 1px solid var(--warm-brown);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 0.75rem;
  color: var(--warm-brown);
  transition: transform 0.3s;
}

.faq-item.open .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
}

.faq-item.open .faq-answer { max-height: 300px; }

.faq-answer p {
  padding: 0 0 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.9;
}

/* ============================================================
   合作伙伴模块
   ============================================================ */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-bottom: 48px;
}

.partner-logo {
  width: 130px; height: 60px;
  background: var(--beige);
  border: 1px solid var(--border-color);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  transition: border-color 0.3s, background 0.3s;
}

.partner-logo:hover {
  border-color: var(--warm-brown);
  background: var(--cream);
}

/* ============================================================
   联系模块
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 28px;
}

.contact-item {
  text-align: center;
  padding: 28px 20px;
  background: rgba(245,240,232,0.08);
  border: 1px solid rgba(200,120,58,0.3);
}

.contact-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  color: var(--warm-orange);
}

.contact-label {
  font-size: 0.78rem;
  letter-spacing: 2px;
  color: var(--text-light);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.contact-value {
  font-size: 0.95rem;
  color: var(--cream);
}

/* QR码占位 */
.qr-placeholder {
  width: 100px; height: 100px;
  background: var(--beige);
  margin: 12px auto 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  border: 1px dashed var(--border-color);
}

/* ============================================================
   AI滤镜模块
   ============================================================ */
.ai-filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.filter-card {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--warm-brown);
  cursor: pointer;
  transition: transform 0.3s;
}

.filter-card:hover { transform: scale(1.03); }

.filter-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
}

.filter-name {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.75));
  color: var(--cream);
  padding: 20px 10px 10px;
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-align: center;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: var(--deep-brown);
  color: var(--light-gray);
  padding: 48px 0 24px;
  border-top: 2px solid var(--warm-brown);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.footer-brand .logo-text {
  font-size: 1.4rem;
  color: var(--cream);
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-light);
  margin-bottom: 16px;
}

.footer-col h4 {
  font-size: 0.9rem;
  color: var(--beige);
  letter-spacing: 2px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(200,120,58,0.4);
}

.footer-col ul { list-style: none; }

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  font-size: 0.83rem;
  color: var(--text-light);
  transition: color 0.3s;
}

.footer-col ul li a:hover { color: var(--warm-orange); }

.footer-bottom {
  border-top: 1px solid rgba(200,120,58,0.3);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-light);
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-light);
}

.footer-links a:hover { color: var(--warm-orange); }

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
  background: var(--beige);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

/* ============================================================
   内页标题区
   ============================================================ */
.page-hero {
  background: var(--dark-brown);
  padding: 60px 0 50px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,0.4) 100%);
  pointer-events: none;
}

.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--cream);
  letter-spacing: 4px;
  position: relative;
  z-index: 1;
  margin-bottom: 10px;
}

.page-hero p {
  color: var(--light-gray);
  font-size: 0.95rem;
  letter-spacing: 2px;
  position: relative;
  z-index: 1;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
  .story-block { grid-template-columns: 1fr; gap: 28px; }
  .story-block.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; flex-direction: column; width: 100%; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 20px; border-bottom: 1px solid rgba(200,120,58,0.2); }
  .nav-toggle { display: block; }
  .header-inner { flex-wrap: wrap; gap: 8px; }
  .hero-banner { height: 70vh; }
  .video-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 48px 0; }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; align-items: center; }
  .photographer-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-filter-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   懒加载占位
   ============================================================ */
img[data-src] {
  background: var(--beige);
  min-height: 120px;
}

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeInUp 0.6s ease forwards; }

/* 胶片光晕效果 */
@keyframes filmFlicker {
  0%, 100% { opacity: 1; }
  92% { opacity: 1; }
  93% { opacity: 0.85; }
  94% { opacity: 1; }
  96% { opacity: 0.9; }
  97% { opacity: 1; }
}

.film-flicker { animation: filmFlicker 8s infinite; }