/* ===================================================
   17C 工业复古Loft风格主样式表
   Industrial Vintage Loft Style - Main Stylesheet
   =================================================== */

/* CSS 变量 - 工业色调 */
:root {
  --color-black: #1a1a1a;
  --color-dark: #222222;
  --color-charcoal: #2d2d2d;
  --color-rust: #8b3a2a;
  --color-rust-light: #c0522a;
  --color-brick: #7a3b2e;
  --color-wood: #6b4c2a;
  --color-wood-light: #9a6b3e;
  --color-metal: #4a4a4a;
  --color-metal-light: #6e6e6e;
  --color-concrete: #5a5a5a;
  --color-gold: #c9a84c;
  --color-amber: #d4882a;
  --color-cream: #e8dcc8;
  --color-text: #d0c8b8;
  --color-text-muted: #8a8070;
  --font-title: 'Noto Serif SC', 'SimSun', serif;
  --font-body: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --transition: 0.3s ease;
  --shadow: 0 4px 20px rgba(0,0,0,0.5);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.7);
}

/* 重置与基础 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--color-black);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-amber);
}

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

ul, ol {
  list-style: none;
}

/* 容器 */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===================================================
   顶部导航
   =================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26,26,26,0.95);
  border-bottom: 1px solid rgba(139,58,42,0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 24px;
  max-width: 1280px;
  margin: 0 auto;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-mark {
  font-size: 28px;
  font-weight: 900;
  color: var(--color-rust-light);
  letter-spacing: -1px;
  font-family: var(--font-title);
  text-shadow: 0 0 20px rgba(192,82,42,0.5);
}

.logo-text {
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  line-height: 1.3;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  color: var(--color-text-muted);
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 2px;
  transition: all var(--transition);
  letter-spacing: 0.5px;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 14px;
  right: 14px;
  height: 1px;
  background: var(--color-rust-light);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-cream);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

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

/* 搜索框 */
.search-bar-wrap {
  background: var(--color-charcoal);
  border-bottom: 1px solid rgba(139,58,42,0.2);
  padding: 10px 0;
}

.search-bar-inner {
  display: flex;
  align-items: center;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 8px;
}

.search-input {
  flex: 1;
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--color-metal);
  border-radius: 2px;
  padding: 8px 16px;
  color: var(--color-text);
  font-size: 14px;
  font-family: var(--font-body);
  outline: none;
  transition: border-color var(--transition);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

.search-input:focus {
  border-color: var(--color-rust-light);
}

.search-btn {
  background: var(--color-rust);
  border: none;
  color: var(--color-cream);
  padding: 8px 20px;
  font-size: 14px;
  cursor: pointer;
  border-radius: 2px;
  font-family: var(--font-body);
  transition: background var(--transition);
  letter-spacing: 1px;
}

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

/* ===================================================
   首屏 Banner
   =================================================== */
.hero-section {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: 0;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(26,26,26,0.3) 0%,
    rgba(26,26,26,0.1) 40%,
    rgba(26,26,26,0.6) 80%,
    rgba(26,26,26,0.95) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  max-width: 900px;
}

.hero-eyebrow {
  font-size: 13px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--color-rust-light);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.hero-eyebrow::before,
.hero-eyebrow::after {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--color-rust-light);
}

.hero-title {
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 900;
  color: #fff;
  font-family: var(--font-title);
  line-height: 1.1;
  margin-bottom: 16px;
  text-shadow: 0 2px 30px rgba(0,0,0,0.8);
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: clamp(16px, 2.5vw, 22px);
  color: var(--color-cream);
  margin-bottom: 12px;
  font-weight: 300;
  letter-spacing: 1px;
}

.hero-desc {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.btn-primary {
  background: var(--color-rust);
  color: #fff;
  padding: 14px 36px;
  font-size: 15px;
  font-family: var(--font-body);
  border: 2px solid var(--color-rust);
  cursor: pointer;
  letter-spacing: 2px;
  transition: all var(--transition);
  text-decoration: none;
  display: inline-block;
  clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
}

.btn-primary:hover {
  background: var(--color-rust-light);
  border-color: var(--color-rust-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(192,82,42,0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--color-cream);
  padding: 14px 36px;
  font-size: 15px;
  font-family: var(--font-body);
  border: 2px solid rgba(232,220,200,0.4);
  cursor: pointer;
  letter-spacing: 2px;
  transition: all var(--transition);
  text-decoration: none;
  display: inline-block;
  clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
}

.btn-secondary:hover {
  border-color: var(--color-cream);
  color: #fff;
  transform: translateY(-2px);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: bounce 2s infinite;
}

.hero-scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-rust-light), transparent);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===================================================
   通用区块样式
   =================================================== */
.section {
  padding: 80px 0;
}

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

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

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  font-size: 12px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--color-rust-light);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.section-label::before,
.section-label::after {
  content: '';
  display: block;
  width: 30px;
  height: 1px;
  background: var(--color-rust-light);
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--color-cream);
  font-family: var(--font-title);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 16px;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* 装饰分割线 */
.divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 24px 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-metal), transparent);
}

.divider-icon {
  color: var(--color-rust-light);
  font-size: 18px;
}

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

.video-card {
  background: var(--color-charcoal);
  border: 1px solid rgba(74,74,74,0.5);
  border-radius: 2px;
  overflow: hidden;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
}

.video-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-rust-light);
  box-shadow: var(--shadow-hover);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--color-metal);
}

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

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

/* 金属光泽反射效果 */
.video-thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    transparent 30%,
    rgba(201,168,76,0.15) 50%,
    transparent 70%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
  pointer-events: none;
}

.video-card:hover .video-thumb::before {
  opacity: 1;
  animation: metalShine 0.6s ease forwards;
}

@keyframes metalShine {
  0% { background-position: -200% center; opacity: 0; }
  50% { opacity: 1; }
  100% { background-position: 200% center; opacity: 0.3; }
}

/* 锈迹颗粒抖动效果 */
.video-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 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='0.65' numOctaves='3' 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");
  opacity: 0;
  z-index: 3;
  pointer-events: none;
  mix-blend-mode: overlay;
  transition: opacity 0.3s ease;
}

.video-card:hover .video-thumb::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(0.1deg); }
  50% { transform: translate(-0.5px, 0.5px) rotate(-0.1deg); }
  75% { transform: translate(0.5px, -0.5px) rotate(0.1deg); }
  100% { transform: translate(-0.5px, -0.5px) rotate(-0.1deg); }
}

/* 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(139,58,42,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 4;
  opacity: 0;
  transition: all 0.3s ease;
  border: 2px solid rgba(201,168,76,0.6);
  box-shadow: 0 0 20px rgba(139,58,42,0.6);
}

.play-btn::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}

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

/* 视频标签 */
.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--color-rust);
  color: #fff;
  font-size: 11px;
  padding: 3px 8px;
  letter-spacing: 1px;
  z-index: 5;
  clip-path: polygon(4px 0%, 100% 0%, calc(100% - 4px) 100%, 0% 100%);
}

.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.7);
  color: var(--color-cream);
  font-size: 12px;
  padding: 2px 6px;
  z-index: 5;
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-cream);
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--color-text-muted);
}

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

.video-stats {
  display: flex;
  gap: 16px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(74,74,74,0.4);
  font-size: 12px;
  color: var(--color-text-muted);
}

.video-stats .stat {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===================================================
   品牌故事模块
   =================================================== */
.story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.story-image {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(139,58,42,0.3);
}

.story-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.story-image:hover img {
  transform: scale(1.03);
}

.story-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(139,58,42,0.2), transparent);
  z-index: 1;
  pointer-events: none;
}

.story-content h3 {
  font-size: 28px;
  font-family: var(--font-title);
  color: var(--color-cream);
  margin-bottom: 16px;
  line-height: 1.4;
}

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

.story-content .quote {
  border-left: 3px solid var(--color-rust-light);
  padding-left: 20px;
  font-style: italic;
  color: var(--color-gold);
  font-size: 16px;
  margin: 24px 0;
  line-height: 1.8;
}

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

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

.image-wall-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.3s ease;
  filter: brightness(0.8) saturate(0.9);
}

.image-wall-item:hover img {
  transform: scale(1.08);
  filter: brightness(1) saturate(1.1);
}

.image-wall-item .overlay {
  position: absolute;
  inset: 0;
  background: rgba(26,26,26,0.6);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  opacity: 0;
  transition: opacity var(--transition);
}

.image-wall-item:hover .overlay {
  opacity: 1;
}

.image-wall-item .overlay span {
  color: #fff;
  font-size: 13px;
  letter-spacing: 1px;
}

/* ===================================================
   AI工坊模块
   =================================================== */
.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.ai-tool-card {
  background: var(--color-charcoal);
  border: 1px solid rgba(74,74,74,0.5);
  padding: 28px 24px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.ai-tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--color-rust), var(--color-gold));
  transform: scaleX(0);
  transition: transform var(--transition);
}

.ai-tool-card:hover {
  border-color: var(--color-rust-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.ai-tool-card:hover::before {
  transform: scaleX(1);
}

.ai-tool-icon {
  width: 48px;
  height: 48px;
  background: rgba(139,58,42,0.2);
  border: 1px solid rgba(139,58,42,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 22px;
}

.ai-tool-card h4 {
  font-size: 17px;
  color: var(--color-cream);
  margin-bottom: 10px;
  font-family: var(--font-title);
}

.ai-tool-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.ai-tool-tag {
  display: inline-block;
  margin-top: 14px;
  font-size: 11px;
  color: var(--color-rust-light);
  border: 1px solid rgba(192,82,42,0.4);
  padding: 3px 10px;
  letter-spacing: 1px;
}

/* ===================================================
   达人模块
   =================================================== */
.creators-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.creator-card {
  text-align: center;
  padding: 28px 20px;
  background: var(--color-charcoal);
  border: 1px solid rgba(74,74,74,0.4);
  transition: all var(--transition);
}

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

.creator-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 16px;
  border: 2px solid var(--color-rust);
  position: relative;
}

.creator-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.creator-name {
  font-size: 16px;
  color: var(--color-cream);
  font-weight: 600;
  margin-bottom: 4px;
}

.creator-role {
  font-size: 13px;
  color: var(--color-rust-light);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.creator-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.creator-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(74,74,74,0.4);
}

.creator-stats .stat {
  text-align: center;
}

.creator-stats .stat-num {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-gold);
  display: block;
}

.creator-stats .stat-label {
  font-size: 11px;
  color: var(--color-text-muted);
}

/* ===================================================
   用户评价
   =================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--color-charcoal);
  border: 1px solid rgba(74,74,74,0.4);
  padding: 24px;
  position: relative;
  transition: all var(--transition);
}

.review-card::before {
  content: '"';
  position: absolute;
  top: 12px;
  right: 20px;
  font-size: 64px;
  color: rgba(139,58,42,0.2);
  font-family: Georgia, serif;
  line-height: 1;
}

.review-card:hover {
  border-color: rgba(139,58,42,0.5);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.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 {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-metal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--color-cream);
  font-weight: 700;
  flex-shrink: 0;
  border: 1px solid var(--color-rust);
}

.review-author-name {
  font-size: 14px;
  color: var(--color-cream);
  font-weight: 600;
}

.review-author-tag {
  font-size: 12px;
  color: var(--color-rust-light);
}

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

.faq-item {
  border-bottom: 1px solid rgba(74,74,74,0.4);
}

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

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

.faq-icon {
  width: 20px;
  height: 20px;
  border: 1px solid var(--color-rust-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
  color: var(--color-rust-light);
  transition: all var(--transition);
}

.faq-item.open .faq-icon {
  background: var(--color-rust);
  border-color: var(--color-rust);
  color: #fff;
  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;
  padding-bottom: 20px;
}

.faq-answer p {
  color: var(--color-text-muted);
  line-height: 1.8;
  font-size: 14px;
}

/* ===================================================
   合作伙伴
   =================================================== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}

.partner-item {
  background: var(--color-charcoal);
  border: 1px solid rgba(74,74,74,0.4);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  transition: all var(--transition);
  filter: grayscale(1) opacity(0.6);
}

.partner-item:hover {
  filter: grayscale(0) opacity(1);
  border-color: var(--color-rust-light);
}

.partner-item span {
  font-size: 14px;
  color: var(--color-text-muted);
  letter-spacing: 1px;
  font-weight: 600;
}

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

.contact-block h4 {
  font-size: 16px;
  color: var(--color-rust-light);
  margin-bottom: 16px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 13px;
}

.contact-block p,
.contact-block li {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 2;
}

.qr-placeholder {
  width: 120px;
  height: 120px;
  background: var(--color-metal);
  border: 1px solid rgba(74,74,74,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
}

.qr-placeholder span {
  font-size: 11px;
  color: var(--color-text-muted);
  letter-spacing: 1px;
}

/* ===================================================
   页脚
   =================================================== */
.site-footer {
  background: #111;
  border-top: 1px solid rgba(139,58,42,0.3);
  padding: 48px 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(74,74,74,0.3);
  margin-bottom: 32px;
}

.footer-brand .logo-mark {
  font-size: 36px;
  display: block;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 280px;
}

.footer-col h5 {
  font-size: 13px;
  color: var(--color-cream);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

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

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

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.footer-copyright a {
  color: var(--color-text-muted);
}

.footer-copyright a:hover {
  color: var(--color-rust-light);
}

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

.social-link {
  width: 32px;
  height: 32px;
  background: var(--color-charcoal);
  border: 1px solid rgba(74,74,74,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--color-text-muted);
  transition: all var(--transition);
  text-decoration: none;
}

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

/* ===================================================
   内页 Banner
   =================================================== */
.inner-hero {
  padding: 120px 0 60px;
  background: var(--color-dark);
  border-bottom: 1px solid rgba(139,58,42,0.2);
  position: relative;
  overflow: hidden;
}

.inner-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}

.inner-hero-content {
  position: relative;
  z-index: 1;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--color-text-muted);
}

.breadcrumb a:hover {
  color: var(--color-rust-light);
}

.breadcrumb-sep {
  color: var(--color-metal);
}

.inner-hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-family: var(--font-title);
  color: var(--color-cream);
  margin-bottom: 16px;
  line-height: 1.3;
}

.inner-hero p {
  font-size: 16px;
  color: var(--color-text-muted);
  max-width: 640px;
  line-height: 1.8;
}

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

.article-card {
  background: var(--color-charcoal);
  border: 1px solid rgba(74,74,74,0.4);
  overflow: hidden;
  transition: all var(--transition);
}

.article-card:hover {
  border-color: var(--color-rust-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.article-thumb {
  aspect-ratio: 16/9;
  overflow: hidden;
}

.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.article-body {
  padding: 20px;
}

.article-category {
  font-size: 11px;
  color: var(--color-rust-light);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.article-title {
  font-size: 17px;
  color: var(--color-cream);
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-excerpt {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--color-text-muted);
  padding-top: 14px;
  border-top: 1px solid rgba(74,74,74,0.3);
}

.article-read-more {
  color: var(--color-rust-light);
  font-size: 13px;
  letter-spacing: 1px;
  transition: color var(--transition);
}

.article-read-more:hover {
  color: var(--color-gold);
}

/* ===================================================
   统计数字
   =================================================== */
.stats-bar {
  background: var(--color-rust);
  padding: 32px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item .num {
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  font-family: var(--font-title);
  display: block;
  line-height: 1.2;
}

.stat-item .label {
  font-size: 13px;
  color: rgba(255,255,255,0.8);
  letter-spacing: 1px;
}

/* ===================================================
   加入仓库指南
   =================================================== */
.join-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
  counter-reset: step;
}

.join-step {
  text-align: center;
  padding: 28px 20px;
  background: var(--color-charcoal);
  border: 1px solid rgba(74,74,74,0.4);
  position: relative;
  counter-increment: step;
}

.join-step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-rust);
  color: #fff;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

.join-step h4 {
  font-size: 16px;
  color: var(--color-cream);
  margin-bottom: 10px;
  margin-top: 8px;
}

.join-step p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===================================================
   响应式
   =================================================== */
@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(26,26,26,0.98);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid rgba(139,58,42,0.3);
    gap: 0;
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav a {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(74,74,74,0.2);
  }
  .nav-toggle {
    display: flex;
  }
  .story-grid {
    grid-template-columns: 1fr;
  }
  .image-wall {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: 1fr;
  }
  .image-wall {
    grid-template-columns: 1fr;
  }
  .creators-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 56px 0;
  }
}

/* ===================================================
   工具类
   =================================================== */
.text-center { text-align: center; }
.text-rust { color: var(--color-rust-light); }
.text-gold { color: var(--color-gold); }
.text-cream { color: var(--color-cream); }
.text-muted { color: var(--color-text-muted); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; }
.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* 懒加载占位 */
img[loading="lazy"] {
  background: var(--color-metal);
  min-height: 200px;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--color-rust);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-rust-light);
}