/**
 * 爱点亮 高端成人用品官网 - 首页样式 v4.3
 * 企业品牌版：产品图片 + 统一图标风格 + 产品宣传片背景
 */

/* ============================================
   CSS 变量定义
   ============================================ */
:root {
  --surface-primary: #F5F3F0;
  --surface-dark: #1A1A1A;
  --surface-dark-secondary: #222222;
  --surface-card: #2a2a2a;
  --accent-gold: #C9A962;
  --accent-gold-light: #D4B978;
  --accent-gold-dark: #A68B4B;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-muted: #888888;
  --text-inverse: #FFFFFF;
  --font-primary: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 80px;
  --space-2xl: 120px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --container-padding: 8vw;
}

/* ============================================
   基础重置
   ============================================ */
.home-wrapper * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.home-wrapper {
  font-family: var(--font-primary);
  color: var(--text-primary);
  background: var(--surface-dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 噪点纹理 */
.noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.02;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* 滚动动画 */
.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }
.delay-7 { transition-delay: 0.7s; }
.delay-8 { transition-delay: 0.8s; }
.delay-9 { transition-delay: 0.9s; }
.delay-10 { transition-delay: 1.0s; }
.delay-11 { transition-delay: 1.1s; }
.delay-12 { transition-delay: 1.2s; }

/* ============================================
   导航栏
   ============================================ */
.home-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 24px var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-base);
}
.home-nav.scrolled {
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(20px);
  padding: 16px var(--container-padding);
  border-bottom: 1px solid rgba(201, 169, 98, 0.1);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  z-index: 1001;
}
.logo-icon {
  color: var(--accent-gold);
  display: flex;
  align-items: center;
}
.logo-icon svg {
  display: block;
}
.logo-text {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-inverse);
}

/* 桌面端导航菜单 */
.nav-menu-full {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}
.nav-menu-full a {
  color: var(--text-inverse);
  text-decoration: none;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.05em;
  position: relative;
  padding: 6px 0;
  transition: color var(--transition-fast);
}
.nav-menu-full a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-gold);
  transition: width var(--transition-base);
}
.nav-menu-full a:hover {
  color: var(--accent-gold);
}
.nav-menu-full a:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.nav-phone {
  color: var(--accent-gold);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.05em;
}
.nav-phone:hover {
  opacity: 0.8;
}

/* ============================================
   汉堡菜单按钮
   ============================================ */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  cursor: pointer;
  z-index: 1001;
  padding: 0;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-inverse);
  transition: all 0.35s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  transform-origin: center;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* ============================================
   移动端全屏菜单
   ============================================ */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(26, 26, 26, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-list {
  list-style: none;
  text-align: center;
  padding: 0;
}

.mobile-menu-list li {
  margin: var(--space-md) 0;
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.4s ease;
}

.mobile-menu.active .mobile-menu-list li {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu.active .mobile-menu-list li:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.active .mobile-menu-list li:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.active .mobile-menu-list li:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.active .mobile-menu-list li:nth-child(4) { transition-delay: 0.25s; }
.mobile-menu.active .mobile-menu-list li:nth-child(5) { transition-delay: 0.3s; }
.mobile-menu.active .mobile-menu-list li:nth-child(6) { transition-delay: 0.35s; }

.mobile-menu-list a {
  display: block;
  color: var(--text-inverse);
  text-decoration: none;
  font-size: 28px;
  font-weight: 300;
  letter-spacing: 0.15em;
  padding: var(--space-sm) var(--space-lg);
  transition: all 0.3s ease;
  position: relative;
}

.mobile-menu-list a::after {
  content: '';
  position: absolute;
  bottom: 50%;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--accent-gold);
  transition: all 0.3s ease;
  transform: translate(-50%, 50%);
}

.mobile-menu-list a:hover {
  color: var(--accent-gold);
}

.mobile-menu-contact {
  margin-top: var(--space-xl);
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.4s ease 0.4s;
}

.mobile-menu.active .mobile-menu-contact {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu-contact a {
  display: block;
  color: var(--accent-gold);
  font-size: 18px;
  text-decoration: none;
  letter-spacing: 0.1em;
  margin-top: var(--space-sm);
}

/* ============================================
   Hero 区域
   ============================================ */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 var(--container-padding);
  padding-top: 120px;
  background: linear-gradient(160deg, var(--surface-dark) 0%, var(--surface-dark-secondary) 100%);
  position: relative;
  overflow: hidden;
}
.hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.hero-video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(26, 26, 26, 0.75) 0%, rgba(26, 26, 26, 0.5) 50%, rgba(26, 26, 26, 0.95) 100%);
  z-index: 1;
}
.hero-glow {
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse 80% 50% at 70% 30%, rgba(201, 169, 98, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: 2;
}
.hero-beam {
  position: absolute;
  top: -50%;
  left: 50%;
  width: 2px;
  height: 200%;
  background: linear-gradient(to bottom, transparent 0%, rgba(201, 169, 98, 0.3) 50%, transparent 100%);
  transform: translateX(-50%) rotate(-15deg);
  opacity: 0.4;
  pointer-events: none;
  z-index: 2;
}
#particles-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}
.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 3;
}
.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(201, 169, 98, 0.15);
  border: 1px solid rgba(201, 169, 98, 0.3);
  font-size: 13px;
  color: var(--accent-gold);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}
.hero-title {
  font-size: clamp(48px, 7vw, 88px);
  font-weight: 200;
  line-height: 1.1;
  letter-spacing: 0.08em;
  color: var(--text-inverse);
  margin-bottom: var(--space-lg);
}
.hero-title-line {
  display: block;
  opacity: 0;
  animation: fadeSlideIn 0.8s ease forwards;
}
.hero-title-line:nth-child(1) { animation-delay: 0.5s; }
.hero-title-line:nth-child(2) { animation-delay: 0.7s; }
.hero-title-accent {
  color: var(--accent-gold);
  font-weight: 400;
}
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-subtitle {
  font-size: 18px;
  font-weight: 300;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeSlideIn 0.8s ease 0.9s forwards;
}
.hero-cta {
  display: flex;
  gap: var(--space-md);
  opacity: 0;
  animation: fadeSlideIn 0.8s ease 1.1s forwards;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  background: var(--accent-gold);
  color: var(--surface-dark);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: all 0.4s ease;
}
.btn-primary:hover {
  background: var(--accent-gold-light);
  transform: translateY(-3px);
  box-shadow: 0 20px 40px rgba(201, 169, 98, 0.3);
}
.btn-primary-large {
  padding: 18px 36px;
  font-size: 15px;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 16px 32px;
  background: transparent;
  color: var(--text-inverse);
  text-decoration: none;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: all 0.4s ease;
}
.btn-secondary:hover {
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  transform: translateY(-3px);
}
.hero-certifications {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  opacity: 0;
  animation: fadeSlideIn 0.8s ease 1.3s forwards;
}
.cert-badge {
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.05em;
}
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  z-index: 3;
}
.scroll-indicator span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.2em;
}
.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent-gold), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; height: 60px; }
  50% { opacity: 1; height: 80px; }
}

/* ============================================
   区块标题
   ============================================ */
.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}
.section-eyebrow {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--accent-gold);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}
.section-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--text-inverse);
  margin-bottom: var(--space-sm);
}
.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

/* ============================================
   关于我们简介
   ============================================ */
.about-intro {
  padding: var(--space-2xl) var(--container-padding);
  background: var(--surface-dark);
}
.about-intro-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}
.about-intro-content {
  padding-right: var(--space-lg);
}
.about-text {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}
.about-stats {
  display: flex;
  justify-content: space-between;
  margin: var(--space-xl) 0;
  padding: var(--space-lg) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.stat-item {
  text-align: center;
  flex: 1;
}
.stat-number {
  display: block;
  font-size: 48px;
  font-weight: 200;
  color: var(--accent-gold);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}
.about-intro-visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.about-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: var(--space-lg);
  transition: all 0.4s ease;
}
.about-card:hover {
  background: rgba(201, 169, 98, 0.08);
  border-color: rgba(201, 169, 98, 0.2);
  transform: translateX(-8px);
}
.about-card-icon {
  color: var(--accent-gold);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
}
.about-card-icon svg {
  display: block;
}
.about-card h3 {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-inverse);
  margin-bottom: 8px;
}
.about-card p {
  font-size: 14px;
  color: var(--text-muted);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.1em;
  transition: all 0.4s ease;
}
.btn-outline:hover {
  background: var(--accent-gold);
  color: var(--surface-dark);
}

/* ============================================
   为什么选择我们 - 视频背景
   ============================================ */
.features-section {
  position: relative;
  padding: var(--space-2xl) var(--container-padding);
  overflow: hidden;
}
.features-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.features-video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(26, 26, 26, 0.92);
  z-index: 1;
}
.features-content {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}
.feature-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--space-lg);
  text-align: center;
  transition: all 0.5s ease;
}
.feature-card:hover {
  background: rgba(201, 169, 98, 0.08);
  border-color: rgba(201, 169, 98, 0.3);
  transform: translateY(-8px);
}
.feature-icon {
  color: var(--accent-gold);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-icon svg {
  display: block;
}
.feature-title {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-inverse);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}
.feature-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ============================================
   产品系列 - 产品图片展示
   ============================================ */
.products-section {
  padding: var(--space-2xl) var(--container-padding);
  background: var(--surface-dark);
}
.products-grid {
  display: grid;
  gap: var(--space-md);
}
.products-grid-full {
  grid-template-columns: repeat(4, 1fr);
}
.product-card {
  position: relative;
  overflow: hidden;
  background: var(--surface-dark-secondary);
  aspect-ratio: 4/3;
  transition: all 0.6s ease;
}
.product-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid var(--accent-gold);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
  z-index: 5;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4), 0 0 80px rgba(201, 169, 98, 0.15);
}
.product-card:hover::after {
  opacity: 1;
}
.product-image {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.8s ease;
  position: relative;
}

/* 产品图片容器 */
.product-img-wrapper {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.product-svg {
  width: 100%;
  height: 100%;
  max-width: 120px;
  max-height: 80px;
  transition: all 0.5s ease;
}
.product-card:hover .product-svg {
  transform: scale(1.1);
  filter: drop-shadow(0 0 20px rgba(201, 169, 98, 0.3));
}

/* 产品遮罩和文字 */
.product-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-lg);
  background: linear-gradient(to top, rgba(26, 26, 26, 0.98) 0%, transparent 100%);
  z-index: 3;
}
.product-name {
  font-size: 20px;
  font-weight: 500;
  color: var(--text-inverse);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.product-count {
  font-size: 14px;
  color: var(--accent-gold);
  letter-spacing: 0.05em;
}
.product-link {
  position: absolute;
  inset: 0;
  z-index: 10;
}
.product-arrow {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 169, 98, 0.2);
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  opacity: 0;
  transform: translate(-10px, 10px);
  transition: all 0.4s ease;
  z-index: 4;
}
.product-card:hover .product-arrow {
  opacity: 1;
  transform: translate(0, 0);
}
.product-card-more {
  background: rgba(201, 169, 98, 0.08);
  border: 1px dashed rgba(201, 169, 98, 0.3);
}
.product-card-more:hover {
  background: rgba(201, 169, 98, 0.15);
}
.product-card-more::after {
  display: none;
}
.product-more-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 3;
}
.product-more-icon {
  color: var(--accent-gold);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-more-icon svg {
  display: block;
}
.products-cta {
  text-align: center;
  margin-top: var(--space-xl);
}

/* ============================================
   最新动态
   ============================================ */
.news-section {
  padding: var(--space-2xl) var(--container-padding);
  background: linear-gradient(180deg, var(--surface-dark-secondary) 0%, var(--surface-dark) 100%);
}
.news-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-md);
  max-width: 1400px;
  margin: 0 auto;
}
.news-featured {
  height: 100%;
  min-height: 500px;
}
.news-featured-link {
  display: block;
  height: 100%;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  background: var(--surface-dark-secondary);
}
.news-featured-image {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}
.news-featured-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 26, 26, 0.98) 0%, rgba(26, 26, 26, 0.4) 50%, transparent 100%);
}
.news-featured-badge {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  padding: 6px 14px;
  background: var(--accent-gold);
  color: var(--surface-dark);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  z-index: 2;
}
.news-featured-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-lg);
  z-index: 2;
}
.news-meta {
  display: flex;
  gap: var(--space-md);
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}
.news-date {}
.news-read-time {
  color: var(--accent-gold);
}
.news-title {
  font-size: 24px;
  font-weight: 500;
  color: var(--text-inverse);
  line-height: 1.4;
  margin-bottom: var(--space-sm);
}
.news-excerpt {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-read-more {
  font-size: 14px;
  color: var(--accent-gold);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.news-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-decoration: none;
  color: inherit;
  transition: all 0.4s ease;
}
.news-item:hover {
  background: rgba(201, 169, 98, 0.06);
  border-color: rgba(201, 169, 98, 0.2);
}
.news-item-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm);
  background: rgba(255, 255, 255, 0.03);
  min-width: 60px;
}
.news-day {
  font-size: 24px;
  font-weight: 300;
  color: var(--accent-gold);
  line-height: 1;
}
.news-month {
  font-size: 12px;
  color: var(--text-muted);
}
.news-item-content h4 {
  font-size: 16px;
  font-weight: 400;
  color: var(--text-inverse);
  margin-bottom: 8px;
  line-height: 1.4;
}
.news-item-content p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}
.news-cta {
  text-align: center;
  margin-top: var(--space-xl);
}

/* ============================================
   资质认证
   ============================================ */
.certifications-section {
  padding: var(--space-2xl) var(--container-padding);
  background: var(--surface-dark);
}
.certifications-grid {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.certification-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.5s ease;
  min-width: 200px;
}
.certification-card:hover {
  background: rgba(201, 169, 98, 0.08);
  border-color: rgba(201, 169, 98, 0.3);
  transform: translateY(-4px);
}
.certification-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 169, 98, 0.15);
  border-radius: 50%;
  color: var(--accent-gold);
  margin-bottom: var(--space-md);
}
.certification-icon svg {
  display: block;
}
.certification-card h3 {
  font-size: 20px;
  font-weight: 500;
  color: var(--accent-gold);
  margin-bottom: 8px;
}
.certification-card p {
  font-size: 13px;
  color: var(--text-muted);
}
.certifications-cta {
  text-align: center;
  margin-top: var(--space-xl);
}

/* ============================================
   合作之旅 - 报价表单
   ============================================ */
.contact-section {
  padding: var(--space-2xl) var(--container-padding);
  background: linear-gradient(180deg, var(--surface-dark) 0%, var(--surface-dark-secondary) 100%);
}
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  max-width: 1400px;
  margin: 0 auto;
}
.contact-info {
  padding-right: var(--space-xl);
}
.contact-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}
.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.contact-method {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}
.contact-method-icon {
  color: var(--accent-gold);
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.contact-method-icon svg {
  display: block;
}
.contact-method-label {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}
.contact-method-value {
  font-size: 16px;
  color: var(--text-inverse);
  text-decoration: none;
}
.contact-method-value:hover {
  color: var(--accent-gold);
}
.contact-form-wrapper {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(201, 169, 98, 0.2);
  padding: var(--space-xl);
}
.form-title {
  font-size: 24px;
  font-weight: 500;
  color: var(--text-inverse);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-lg);
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-group label {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-inverse);
  font-family: var(--font-primary);
  font-size: 14px;
  transition: all 0.3s ease;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.3);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-gold);
  background: rgba(201, 169, 98, 0.05);
}
.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}
.form-group textarea {
  resize: vertical;
  min-height: 100px;
}
.form-group-full {
  grid-column: 1 / -1;
}
.form-submit {
  grid-column: 1 / -1;
}
.btn-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 18px 32px;
  background: var(--accent-gold);
  color: var(--surface-dark);
  border: none;
  font-family: var(--font-primary);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: all 0.4s ease;
  margin-top: var(--space-sm);
}
.btn-submit:hover {
  background: var(--accent-gold-light);
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(201, 169, 98, 0.3);
}
.btn-submit-icon {
  transition: transform 0.3s ease;
  display: flex;
  align-items: center;
}
.btn-submit:hover .btn-submit-icon {
  transform: translateX(4px);
}

/* ============================================
   底部
   ============================================ */
.home-footer {
  background: var(--surface-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: var(--space-2xl) var(--container-padding) var(--space-lg);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  max-width: 1400px;
  margin: 0 auto;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: var(--space-md);
}
.footer-tagline {
  font-size: 18px;
  color: var(--accent-gold);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}
.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}
.footer-social {
  display: flex;
  gap: var(--space-sm);
}
.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.3s ease;
}
.social-link:hover {
  background: rgba(201, 169, 98, 0.2);
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}
.footer-column h4 {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-inverse);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}
.footer-column ul {
  list-style: none;
}
.footer-column li {
  margin-bottom: var(--space-sm);
}
.footer-column a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.footer-column a:hover {
  color: var(--accent-gold);
}
.footer-bottom {
  padding-top: var(--space-lg);
  max-width: 1400px;
  margin: 0 auto;
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.copyright {
  font-size: 12px;
  color: var(--text-muted);
}
.footer-certifications {
  display: flex;
  gap: var(--space-sm);
}
.cert-mini {
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ============================================
   Toast 提示
   ============================================ */
.form-toast {
  position: fixed;
  top: 100px;
  right: 20px;
  padding: 16px 24px;
  background: rgba(201, 169, 98, 0.95);
  color: var(--surface-dark);
  font-size: 14px;
  font-weight: 500;
  border-radius: 4px;
  z-index: 10000;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.3s ease;
}
.form-toast.show {
  opacity: 1;
  transform: translateX(0);
}
.form-toast-content {
  display: flex;
  align-items: center;
  gap: 10px;
}
.form-toast-icon {
  display: flex;
  align-items: center;
}

/* ============================================
   响应式 - 平板
   ============================================ */
@media (max-width: 1200px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .products-grid-full {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   响应式 - 大平板
   ============================================ */
@media (max-width: 992px) {
  .nav-menu-full {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .about-intro-inner {
    grid-template-columns: 1fr;
  }
  .about-intro-visual {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }
  .products-grid-full {
    grid-template-columns: repeat(2, 1fr);
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .news-featured {
    min-height: 400px;
  }
  .contact-inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   响应式 - 移动端 (768px以下)
   双排优化
   ============================================ */
@media (max-width: 768px) {
  :root {
    --container-padding: 5vw;
    --space-xl: 50px;
    --space-2xl: 70px;
  }
  
  /* 移动端导航 */
  .home-nav {
    padding: 16px var(--container-padding);
  }
  .home-nav.scrolled {
    padding: 12px var(--container-padding);
  }
  .logo-text {
    font-size: 18px;
  }
  .nav-actions {
    display: none;
  }
  
  /* Hero 优化 */
  .hero-section {
    padding-top: 100px;
  }
  .hero-title {
    letter-spacing: 0.04em;
  }
  .hero-badge {
    font-size: 11px;
    padding: 6px 12px;
  }
  .hero-subtitle {
    font-size: 15px;
    line-height: 1.7;
  }
  .hero-cta {
    flex-direction: column;
    gap: var(--space-sm);
  }
  .hero-certifications {
    flex-wrap: wrap;
    gap: var(--space-xs);
  }
  .cert-badge {
    font-size: 10px;
    padding: 4px 8px;
  }
  
  /* 为什么选择我们 - 双排 */
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }
  .feature-card {
    padding: var(--space-md);
  }
  .feature-icon {
    margin-bottom: var(--space-sm);
  }
  .feature-icon svg {
    width: 36px;
    height: 36px;
  }
  .feature-title {
    font-size: 15px;
  }
  .feature-desc {
    font-size: 12px;
    line-height: 1.6;
  }
  
  /* 二十年匠心 - 双排统计数字 */
  .about-intro {
    padding: var(--space-xl) var(--container-padding);
  }
  .about-intro-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }
  .about-card {
    padding: var(--space-md);
  }
  .about-card-icon svg {
    width: 24px;
    height: 24px;
  }
  .about-card h3 {
    font-size: 15px;
  }
  .about-card p {
    font-size: 12px;
  }
  .about-text {
    font-size: 14px;
  }
  .about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    padding: var(--space-md) 0;
  }
  .stat-item {
    padding: var(--space-sm) 0;
  }
  .stat-number {
    font-size: 36px;
  }
  .stat-label {
    font-size: 12px;
  }
  
  /* 全系列精品 - 双排 */
  .products-section {
    padding: var(--space-xl) var(--container-padding);
  }
  .products-grid-full {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }
  .product-card {
    aspect-ratio: 1/1;
  }
  .product-img-wrapper {
    padding: 15px;
  }
  .product-svg {
    max-width: 80px;
    max-height: 60px;
  }
  .product-overlay {
    padding: var(--space-sm);
  }
  .product-name {
    font-size: 14px;
  }
  .product-count {
    font-size: 12px;
  }
  .product-arrow {
    width: 32px;
    height: 32px;
    top: var(--space-sm);
    right: var(--space-sm);
    opacity: 1;
    transform: translate(0, 0);
  }
  .product-more-icon svg {
    width: 32px;
    height: 32px;
  }
  .section-header {
    margin-bottom: var(--space-lg);
  }
  .section-title {
    font-size: 28px;
  }
  .section-desc {
    font-size: 14px;
  }
  
  /* 资讯优化 */
  .news-section {
    padding: var(--space-xl) var(--container-padding);
  }
  .news-featured {
    min-height: 350px;
  }
  .news-title {
    font-size: 18px;
  }
  .news-excerpt {
    font-size: 13px;
  }
  .news-item {
    padding: var(--space-sm);
  }
  .news-item-date {
    min-width: 50px;
    padding: var(--space-xs);
  }
  .news-day {
    font-size: 20px;
  }
  .news-item-content h4 {
    font-size: 14px;
  }
  .news-item-content p {
    font-size: 12px;
  }
  
  /* 资质认证 - 双排 */
  .certifications-section {
    padding: var(--space-xl) var(--container-padding);
  }
  .certifications-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }
  .certification-card {
    padding: var(--space-md);
    min-width: unset;
  }
  .certification-icon {
    width: 40px;
    height: 40px;
    margin-bottom: var(--space-sm);
  }
  .certification-icon svg {
    width: 20px;
    height: 20px;
  }
  .certification-card h3 {
    font-size: 16px;
  }
  .certification-card p {
    font-size: 11px;
  }
  
  /* 联系表单 */
  .contact-section {
    padding: var(--space-xl) var(--container-padding);
  }
  .contact-form-wrapper {
    padding: var(--space-lg);
  }
  .form-title {
    font-size: 20px;
  }
  
  /* 底部导航 - 双排 */
  .home-footer {
    padding: var(--space-xl) var(--container-padding) var(--space-lg);
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  .footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }
  .footer-column h4 {
    font-size: 13px;
    margin-bottom: var(--space-sm);
  }
  .footer-column a {
    font-size: 12px;
  }
  .footer-bottom-inner {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  .footer-certifications {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  /* 按钮优化 */
  .btn-primary {
    padding: 14px 24px;
    font-size: 13px;
  }
  .btn-outline {
    padding: 14px 28px;
    font-size: 13px;
  }
  .btn-submit {
    padding: 16px 24px;
    font-size: 14px;
  }
  
  /* 滚动指示器隐藏 */
  .scroll-indicator {
    display: none;
  }
}

/* ============================================
   响应式 - 小屏手机 (480px以下)
   ============================================ */
@media (max-width: 480px) {
  :root {
    --container-padding: 4vw;
  }
  
  .hero-title {
    font-size: 42px;
  }
  .hero-subtitle {
    font-size: 14px;
  }
  
  .features-grid {
    gap: var(--space-xs);
  }
  .feature-card {
    padding: var(--space-sm);
  }
  
  .products-grid-full {
    gap: var(--space-xs);
  }
  
  .certifications-grid {
    gap: var(--space-xs);
  }
  
  .footer-links {
    gap: var(--space-sm);
  }
}

/* ============================================
   禁用背景视频（提升移动端性能）
   ============================================ */
@media (max-width: 768px) {
  .hero-video,
  .features-video {
    display: none;
  }
  .hero-section,
  .features-section {
    background: linear-gradient(160deg, #1A1A1A 0%, #222222 100%);
  }
  .features-video-overlay {
    display: none;
  }
}