/* ===== 蘑菇视频 - 工业复古Loft风格全站CSS ===== */
/* Color Palette: 深灰黑 #1a1a1a, 锈红砖色 #8B2500, 原木棕 #6B4226, 冷金属灰 #4a4a4a, 老旧水泥色 #888 */

:root {
  --color-bg: #111111;
  --color-bg2: #1a1a1a;
  --color-bg3: #222222;
  --color-rust: #8B2500;
  --color-rust-light: #b83200;
  --color-wood: #6B4226;
  --color-metal: #4a4a4a;
  --color-cement: #888888;
  --color-text: #d4c9b8;
  --color-text-light: #f0e8d8;
  --color-gold: #c8a96e;
  --color-gold-light: #e8c98e;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --font-display: 'Impact', 'Arial Black', 'PingFang SC', sans-serif;
  --border-metal: 1px solid #3a3a3a;
  --shadow-glow: 0 0 20px rgba(139, 37, 0, 0.3);
  --transition: all 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--color-gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-gold-light); }

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

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg2); }
::-webkit-scrollbar-thumb { background: var(--color-rust); border-radius: 3px; }

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(17, 17, 17, 0.95);
  border-bottom: 2px solid var(--color-rust);
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 900;
  color: var(--color-gold);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.site-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-rust);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: #fff;
  border: 2px solid var(--color-gold);
}

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

.main-nav a {
  color: var(--color-text);
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gold);
  transition: var(--transition);
}

/* ===== 搜索框 ===== */
.search-bar-wrap {
  background: var(--color-bg2);
  border-bottom: 1px solid var(--color-metal);
  padding: 10px 0;
  margin-top: 64px;
}

.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-input-wrap {
  flex: 1;
  max-width: 600px;
  display: flex;
  align-items: center;
  background: var(--color-bg3);
  border: 1px solid var(--color-metal);
  border-radius: 4px;
  overflow: hidden;
  transition: var(--transition);
}

.search-input-wrap:focus-within {
  border-color: var(--color-rust);
  box-shadow: var(--shadow-glow);
}

.search-input-wrap input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-text);
  padding: 10px 16px;
  font-size: 14px;
  font-family: var(--font-main);
}

.search-input-wrap input::placeholder { color: var(--color-cement); }

.search-btn {
  background: var(--color-rust);
  border: none;
  color: #fff;
  padding: 10px 20px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.search-btn:hover { background: var(--color-rust-light); }

/* ===== 首屏Banner ===== */
.hero-banner {
  position: relative;
  height: 90vh;
  min-height: 500px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  filter: brightness(0.45);
  transform: scale(1.05);
  transition: transform 8s ease;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(139,37,0,0.3) 0%, rgba(17,17,17,0.6) 60%, rgba(17,17,17,0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 20px;
  max-width: 900px;
}

.hero-tag {
  display: inline-block;
  background: var(--color-rust);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  padding: 4px 16px;
  margin-bottom: 20px;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 900;
  color: var(--color-text-light);
  line-height: 1.15;
  letter-spacing: 2px;
  margin-bottom: 16px;
  text-shadow: 2px 4px 16px rgba(0,0,0,0.7);
}

.hero-title span { color: var(--color-gold); }

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: var(--color-cement);
  margin-bottom: 36px;
  letter-spacing: 1px;
}

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

.btn-primary {
  background: var(--color-rust);
  color: #fff;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
  border: 2px solid var(--color-rust);
  cursor: pointer;
  transition: var(--transition);
  display: inline-block;
}

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

.btn-outline {
  background: transparent;
  color: var(--color-gold);
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
  border: 2px solid var(--color-gold);
  cursor: pointer;
  transition: var(--transition);
  display: inline-block;
}

.btn-outline:hover {
  background: var(--color-gold);
  color: var(--color-bg);
}

/* ===== 通用Section ===== */
.section {
  padding: 80px 0;
}

.section-alt { background: var(--color-bg2); }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-header {
  text-align: center;
  margin-bottom: 52px;
}

.section-tag {
  display: inline-block;
  color: var(--color-rust);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--color-rust);
  padding-bottom: 4px;
}

.section-title {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 900;
  color: var(--color-text-light);
  letter-spacing: 2px;
  line-height: 1.25;
}

.section-title span { color: var(--color-gold); }

.section-desc {
  margin-top: 14px;
  color: var(--color-cement);
  font-size: 15px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.video-card {
  background: var(--color-bg2);
  border: var(--border-metal);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  border-color: var(--color-rust);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(139,37,0,0.25);
}

.video-thumb-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: #000;
}

.video-thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.3s ease;
}

.video-card:hover .video-thumb-wrap img {
  transform: scale(1.05);
  filter: brightness(0.7);
}

/* 金属光泽反射效果 */
.video-thumb-wrap::before {
  content: '';
  position: absolute;
  top: -100%;
  left: -60%;
  width: 40%;
  height: 300%;
  background: linear-gradient(105deg, transparent 30%, rgba(200,169,110,0.35) 50%, transparent 70%);
  transform: skewX(-15deg);
  transition: left 0.6s ease, top 0.6s ease;
  z-index: 2;
  pointer-events: none;
}

.video-card:hover .video-thumb-wrap::before {
  left: 130%;
}

/* 锈迹颗粒抖动效果 */
.video-thumb-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23noise)' opacity='0.08'/%3E%3C/svg%3E");
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
  pointer-events: none;
  mix-blend-mode: overlay;
}

.video-card:hover .video-thumb-wrap::after {
  opacity: 1;
  animation: rustShake 0.4s ease infinite alternate;
}

@keyframes rustShake {
  0% { transform: translate(0,0) rotate(0deg); }
  25% { transform: translate(0.5px,-0.5px) rotate(0.2deg); }
  50% { transform: translate(-0.5px,0.5px) rotate(-0.2deg); }
  75% { transform: translate(0.5px,0.5px) rotate(0.1deg); }
  100% { transform: translate(-0.5px,-0.5px) rotate(-0.1deg); }
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%) scale(0.7);
  width: 56px;
  height: 56px;
  background: rgba(139,37,0,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 3;
  border: 2px solid var(--color-gold);
}

.play-btn svg { width: 22px; height: 22px; fill: #fff; margin-left: 4px; }

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

.video-info { padding: 16px; }

.video-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-light);
  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: 12px;
  color: var(--color-cement);
}

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

.video-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }

.tag {
  font-size: 11px;
  color: var(--color-rust-light);
  border: 1px solid var(--color-rust);
  padding: 2px 8px;
  border-radius: 2px;
}

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

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

.story-img-wrap img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  filter: sepia(20%) contrast(1.1);
}

.story-img-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 3px solid var(--color-rust);
  transform: translate(10px, 10px);
  z-index: -1;
}

.story-text h2 {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-text-light);
  margin-bottom: 20px;
  line-height: 1.3;
}

.story-text p {
  color: var(--color-text);
  line-height: 1.9;
  margin-bottom: 16px;
  font-size: 15px;
}

.story-divider {
  width: 60px;
  height: 3px;
  background: var(--color-rust);
  margin: 24px 0;
}

/* ===== 影像作品墙 ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}

.gallery-item {
  overflow: hidden;
  aspect-ratio: 4/3;
  position: relative;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.3s ease;
  filter: sepia(15%) contrast(1.1);
}

.gallery-item:hover img {
  transform: scale(1.08);
  filter: sepia(0%) contrast(1.2) brightness(0.8);
}

.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(139,37,0,0.7) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: flex-end;
  padding: 16px;
}

.gallery-item:hover .gallery-item-overlay { opacity: 1; }

.gallery-item-overlay span {
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}

/* ===== AI工坊 ===== */
.ai-section {
  position: relative;
  overflow: hidden;
}

.ai-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.25);
}

.ai-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.ai-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 30px;
}

.ai-feature-item {
  background: rgba(26,26,26,0.8);
  border: 1px solid var(--color-metal);
  padding: 20px;
  transition: var(--transition);
}

.ai-feature-item:hover {
  border-color: var(--color-rust);
  background: rgba(139,37,0,0.15);
}

.ai-feature-icon {
  font-size: 28px;
  margin-bottom: 10px;
}

.ai-feature-item h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 6px;
}

.ai-feature-item p {
  font-size: 12px;
  color: var(--color-cement);
  line-height: 1.6;
}

/* ===== 创作者 ===== */
.creators-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.creator-card {
  background: var(--color-bg2);
  border: var(--border-metal);
  padding: 28px;
  text-align: center;
  transition: var(--transition);
}

.creator-card:hover {
  border-color: var(--color-rust);
  transform: translateY(-4px);
}

.creator-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--color-rust);
  filter: sepia(10%) contrast(1.1);
}

.creator-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-text-light);
  margin-bottom: 4px;
}

.creator-role {
  font-size: 12px;
  color: var(--color-rust-light);
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.creator-bio {
  font-size: 13px;
  color: var(--color-cement);
  line-height: 1.7;
}

/* ===== 用户评价 ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--color-bg2);
  border: var(--border-metal);
  border-left: 3px solid var(--color-rust);
  padding: 24px;
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--color-rust);
  box-shadow: var(--shadow-glow);
}

.review-stars {
  color: var(--color-gold);
  font-size: 14px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 16px;
  font-style: italic;
}

.review-author {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-gold);
}

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

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

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--color-text-light);
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-main);
  text-align: left;
  padding: 20px 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}

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

.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  background: var(--color-rust);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.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-answer-inner {
  padding: 0 0 20px;
  color: var(--color-cement);
  font-size: 14px;
  line-height: 1.8;
}

.faq-item.open .faq-answer { max-height: 200px; }

/* ===== 合作伙伴 ===== */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin-bottom: 48px;
}

.partner-item {
  background: var(--color-bg2);
  border: var(--border-metal);
  padding: 16px 32px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-cement);
  letter-spacing: 1px;
  transition: var(--transition);
}

.partner-item:hover {
  border-color: var(--color-rust);
  color: var(--color-gold);
}

/* ===== 联系模块 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

.contact-item {
  background: var(--color-bg2);
  border: var(--border-metal);
  padding: 28px;
  text-align: center;
}

.contact-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.contact-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 10px;
}

.contact-item p {
  font-size: 13px;
  color: var(--color-cement);
  line-height: 1.7;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-bg2);
  border-top: 2px solid var(--color-rust);
  padding: 48px 0 24px;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 20px;
  font-weight: 900;
  color: var(--color-gold);
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--color-cement);
  line-height: 1.8;
  margin-bottom: 16px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-light);
  margin-bottom: 16px;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--color-metal);
  padding-bottom: 8px;
}

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

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

.footer-col ul li a {
  font-size: 13px;
  color: var(--color-cement);
  transition: var(--transition);
}

.footer-col ul li a:hover { color: var(--color-gold); padding-left: 4px; }

.footer-bottom {
  border-top: 1px solid var(--color-metal);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 12px;
  color: var(--color-cement);
}

.footer-social { display: flex; gap: 12px; }

.footer-social a {
  width: 32px;
  height: 32px;
  background: var(--color-metal);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: var(--transition);
  border-radius: 2px;
}

.footer-social a:hover {
  background: var(--color-rust);
  color: #fff;
}

/* ===== 内页通用 ===== */
.page-hero {
  position: relative;
  height: 360px;
  display: flex;
  align-items: center;
  overflow: hidden;
  margin-top: 64px;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.35);
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(139,37,0,0.4) 0%, rgba(17,17,17,0.7) 100%);
}

.page-hero-content {
  position: relative;
  z-index: 2;
  padding: 0 20px;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

.breadcrumb {
  font-size: 13px;
  color: var(--color-cement);
  margin-bottom: 16px;
}

.breadcrumb a { color: var(--color-cement); }
.breadcrumb a:hover { color: var(--color-gold); }
.breadcrumb span { color: var(--color-rust); }

.page-hero-title {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 900;
  color: var(--color-text-light);
  letter-spacing: 2px;
}

.page-hero-desc {
  font-size: 15px;
  color: var(--color-cement);
  margin-top: 12px;
  max-width: 600px;
}

/* ===== 文章卡片 ===== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

.article-card {
  background: var(--color-bg2);
  border: var(--border-metal);
  overflow: hidden;
  transition: var(--transition);
}

.article-card:hover {
  border-color: var(--color-rust);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(139,37,0,0.2);
}

.article-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
  filter: sepia(10%);
}

.article-card:hover img { transform: scale(1.05); }

.article-card-body { padding: 20px; }

.article-card-meta {
  font-size: 12px;
  color: var(--color-rust-light);
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.article-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-light);
  line-height: 1.5;
  margin-bottom: 10px;
}

.article-card-excerpt {
  font-size: 13px;
  color: var(--color-cement);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .story-grid { grid-template-columns: 1fr; }
  .ai-content { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; position: fixed; top: 64px; left: 0; right: 0; background: var(--color-bg); border-bottom: 2px solid var(--color-rust); flex-direction: column; padding: 16px 0; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 24px; border-bottom: none; border-left: 3px solid transparent; }
  .main-nav a:hover, .main-nav a.active { border-left-color: var(--color-rust); }
  .nav-toggle { display: flex; }
  .hero-banner { height: 70vh; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .creators-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .reviews-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.8rem; }
  .section { padding: 50px 0; }
  .gallery-grid { grid-template-columns: 1fr; }
  .ai-features { grid-template-columns: 1fr; }
}

/* ===== 加载动画 ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 金属纹理装饰线 ===== */
.metal-line {
  height: 2px;
  background: linear-gradient(to right, transparent, var(--color-rust), var(--color-gold), var(--color-rust), transparent);
  margin: 0;
}

/* ===== 内页侧边栏 ===== */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

.sidebar-widget {
  background: var(--color-bg2);
  border: var(--border-metal);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-widget h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 16px;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--color-metal);
  padding-bottom: 10px;
}

.sidebar-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.sidebar-tag {
  font-size: 12px;
  color: var(--color-cement);
  border: 1px solid var(--color-metal);
  padding: 4px 10px;
  cursor: pointer;
  transition: var(--transition);
}

.sidebar-tag:hover {
  border-color: var(--color-rust);
  color: var(--color-rust-light);
}

@media (max-width: 1024px) {
  .page-layout { grid-template-columns: 1fr; }
}