/* ============================================
   东巍益华 (DongWeiYiHua) 官网样式
   设计风格：NVIDIA + 东巍红定制
   ============================================ */

/* ---- CSS 变量 ---- */
:root {
  /* 色彩 */
  --dhwy-dark: #0a0a0a;
  --dhwy-dark-2: #1a1a1a;
  --dhwy-dark-3: #2a2a2a;
  --dhwy-white: #ffffff;
  --dhwy-red: #CC0000;
  --dhwy-red-deep: #A00000;
  --dhwy-red-light: rgba(204, 0, 0, 0.1);
  --dhwy-red-hover: rgba(204, 0, 0, 0.08);
  --dhwy-text-light: #ffffff;
  --dhwy-text-muted: #a7a7a7;
  --dhwy-text-dark: #1a1a1a;
  --dhwy-text-gray: #757575;
  --dhwy-border: #333;
  --dhwy-border-light: #e5e5e5;
  --dhwy-bg-gray: #f5f5f5;
  --dhwy-bg-gray-light: #fafafa;

  /* 排版 */
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", Consolas, monospace;

  /* 间距 - 8px grid */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-8: 64px;
  --space-10: 80px;
  --space-12: 96px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

  /* 容器 */
  --container-max: 1200px;
  --container-padding: var(--space-3);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-main);
  color: var(--dhwy-text-dark);
  line-height: 1.65;
  background: var(--dhwy-white);
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

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

/* ---- 排版 ---- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
}

h1 { font-size: 3rem; }       /* 48px */
h2 { font-size: 2.25rem; }    /* 36px */
h3 { font-size: 1.5rem; }     /* 24px */
h4 { font-size: 1.25rem; }    /* 20px */

.text-red { color: var(--dhwy-red); }
.text-muted { color: var(--dhwy-text-muted); }
.text-gray { color: var(--dhwy-text-gray); }
.text-light { color: var(--dhwy-text-light); }

/* ---- 红色短线装饰 ---- */
.accent-line {
  display: inline-block;
  width: 48px;
  height: 3px;
  background: var(--dhwy-red);
  margin-bottom: var(--space-2);
}

/* ---- 区块 ---- */
.section {
  padding: 60px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 2.25rem;
  margin-bottom: var(--space-2);
}

.section-header .accent-line {
  display: block;
  margin: 0 auto var(--space-2);
}

.section-header p {
  color: var(--dhwy-text-gray);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 10px 24px;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.5;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

/* Primary CTA - NVIDIA描边式 */
.btn-primary-outline {
  border: 2px solid var(--dhwy-red);
  color: var(--dhwy-red);
  background: transparent;
}

.btn-primary-outline:hover {
  background: var(--dhwy-red);
  color: var(--dhwy-white);
}

/* Secondary */
.btn-secondary-outline {
  border: 1px solid var(--dhwy-red);
  color: var(--dhwy-red);
  background: transparent;
}

.btn-secondary-outline:hover {
  background: var(--dhwy-red-light);
}

/* Ghost */
.btn-ghost {
  color: var(--dhwy-red);
  background: transparent;
  padding: 8px 16px;
}

.btn-ghost:hover {
  background: var(--dhwy-red-hover);
}

/* Filled - "立即购买" */
.btn-filled {
  background: var(--dhwy-red);
  color: var(--dhwy-white);
  border: 2px solid var(--dhwy-red);
}

.btn-filled:hover {
  background: var(--dhwy-red-deep);
  border-color: var(--dhwy-red-deep);
}

/* Dark变体 */
.btn-dark-outline {
  border: 2px solid var(--dhwy-white);
  color: var(--dhwy-white);
  background: transparent;
}

.btn-dark-outline:hover {
  background: var(--dhwy-white);
  color: var(--dhwy-dark);
}

/* 查看更多按钮 */
.btn-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 36px;
  border: 2px solid var(--dhwy-border-light);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  color: var(--dhwy-text-dark);
  background: #fff;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn-more:hover {
  background: var(--dhwy-red);
  border-color: var(--dhwy-red);
  color: var(--dhwy-white);
}

.btn-dark-text {
  color: var(--dhwy-red);
  background: transparent;
}

.btn-dark-text:hover {
  color: #ff3333;
}

.btn-sm {
  padding: 6px 16px;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

/* ---- 导航栏 ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--dhwy-dark);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background var(--transition-base);
}

.nav.scrolled {
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--dhwy-white);
  flex-shrink: 0;
}

.nav-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--dhwy-bg-gray);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--dhwy-white);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-links a {
  color: var(--dhwy-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 8px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--dhwy-red);
  transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--dhwy-white);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* 导航右侧操作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-action-link {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--dhwy-text-muted);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-action-link:hover,
.nav-action-link.active {
  color: var(--dhwy-white);
  background: rgba(255, 255, 255, 0.08);
}

.nav-action-link svg {
  flex-shrink: 0;
  opacity: 0.7;
}

.cart-badge {
  color: var(--dhwy-red);
  font-weight: 700;
}

.nav-contact-link {
  position: relative;
}

.nav-contact-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--dhwy-red);
  transition: width var(--transition-base);
}

.nav-contact-link:hover::after {
  width: 100%;
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  z-index: 2001;
}

.hamburger span {
  display: block;
  height: 2px;
  background: var(--dhwy-white);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端导航 */
.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  height: calc(100vh - 64px);
  height: calc(100dvh - 64px);
  background: var(--dhwy-dark);
  padding: var(--space-4);
  z-index: 2000;
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav a {
  color: var(--dhwy-text-muted);
  font-size: 1rem;
  padding: 12px 0;
  border-bottom: 1px solid var(--dhwy-border);
  transition: color var(--transition-fast);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--dhwy-white);
}

.mobile-nav .btn {
  margin-top: var(--space-2);
  width: 100%;
}

/* ---- Hero 轮播 ---- */
.hero-slider {
  position: relative;
  width: 100%;
  aspect-ratio: 21 / 9;
  overflow: hidden;
  background: var(--dhwy-dark);
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
  z-index: 0;
}

.hero-slide.active {
  opacity: 1;
  z-index: 1;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 指示点 */
.hero-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.hero-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all 0.3s ease;
}

.hero-dot.active {
  background: var(--dhwy-red);
  width: 28px;
  border-radius: 5px;
}

/* 底部按钮 */
.hero-cta {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--dhwy-white);
  border: 2px solid rgba(255,255,255,0.6);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.3s ease;
}

.hero-cta:hover {
  background: var(--dhwy-red);
  border-color: var(--dhwy-red);
}

.hero-cta svg {
  transition: transform 0.3s ease;
}

.hero-cta:hover svg {
  transform: translateX(4px);
}

/* ---- 品牌矩阵 ---- */
.brand-matrix {
  background: var(--dhwy-dark-2);
}

.brand-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.brand-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--dhwy-border);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.brand-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--dhwy-red);
  transform: scaleX(1);
}

.brand-card:nth-child(1)::before { background: #E60012; }
.brand-card:nth-child(2)::before { background: #005BAC; }
.brand-card:nth-child(3)::before { background: #F19031; }
.brand-card:nth-child(4)::before { background: #009944; }

.brand-card:hover {
  border-color: var(--dhwy-red);
  background: rgba(255,255,255,0.06);
  transform: translateY(-4px);
}

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

.brand-logo-placeholder {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, rgba(204,0,0,0.15), rgba(204,0,0,0.05));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.brand-logo-placeholder::after {
  content: '';
  font-size: 2rem;
  color: var(--dhwy-red);
  font-weight: 900;
}

.brand-card:nth-child(1) .brand-logo-placeholder::after { content: '华测'; }
.brand-card:nth-child(2) .brand-logo-placeholder::after { content: '南方'; }
.brand-card:nth-child(3) .brand-logo-placeholder::after { content: '北斗'; }
.brand-card:nth-child(4) .brand-logo-placeholder::after { content: '科力'; }

.brand-card h4 {
  color: var(--dhwy-white);
  font-size: 1.125rem;
  margin-bottom: var(--space-1);
}

.brand-card p {
  color: var(--dhwy-text-muted);
  font-size: 0.875rem;
}

/* ---- 产品分类（横向可拖动） ---- */
.cat-scroll-wrap {
  position: relative;
  overflow: hidden;
  margin: 0 calc(-1 * var(--container-padding));
  padding: 0 var(--container-padding);
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 2%, #000 98%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0, #000 2%, #000 98%, transparent 100%);
}

.cat-scroll-track {
  display: flex;
  gap: 16px;
  padding: 8px 0 20px;
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  cursor: grab;
  user-select: none;
}

.cat-scroll-track::-webkit-scrollbar {
  display: none;
}

.cat-scroll-track.dragging {
  cursor: grabbing;
  scroll-behavior: auto;
}

/* 产品分类左右滚动按钮 - PC端隐藏，移动端显示 */
.cat-scroll-btn {
  display: none;
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 160px;
  padding: 28px 16px 20px;
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
  background: #fff;
}

.category-card:hover {
  border-color: var(--dhwy-red);
  box-shadow: 0 4px 20px rgba(204, 0, 0, 0.12);
  transform: translateY(-2px);
}

.category-icon {
  width: 64px;
  height: 64px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-icon svg {
  width: 48px;
  height: 48px;
  stroke: var(--dhwy-text-dark);
  transition: stroke 0.3s ease;
}

.category-icon-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.category-card:hover .category-icon svg {
  stroke: var(--dhwy-red);
}

.category-card h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--dhwy-text-dark);
  margin: 0;
  transition: color 0.3s ease;
}

/* ---- 热销推荐 ---- */
.hot-section {
  background: var(--dhwy-bg-gray);
  padding-bottom: 40px;
}

.product-cards-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.product-card {
  background: var(--dhwy-white);
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
  position: relative;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--dhwy-red);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  z-index: 1;
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--dhwy-red);
}

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

.product-card-img {
  height: 220px;
  background: var(--dhwy-bg-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dhwy-text-gray);
  font-size: 0.875rem;
  position: relative;
  overflow: hidden;
}

.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-card-body {
  padding: 16px;
}

.product-card-body h4 {
  font-size: 0.875rem;
  margin-bottom: 8px;
  color: var(--dhwy-text-dark);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.5em;
}

.product-price-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}

.product-price {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--dhwy-red);
  margin: 0;
}

.product-ot-price {
  font-size: 0.75rem;
  color: #999;
  text-decoration: line-through;
}

.product-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: #999;
}

.product-star {
  color: #f5a623;
}

.product-model {
  font-size: 0.8125rem;
  color: var(--dhwy-text-gray);
  margin: 0;
}

.brand-tag-sm {
  display: inline-block;
  font-size: 0.6875rem;
  padding: 1px 6px;
  background: var(--dhwy-red-light);
  color: var(--dhwy-red);
  border-radius: 2px;
  font-weight: 600;
  margin-bottom: 6px;
}

/* ---- 解决方案卡片网格 ---- */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.solutions-row-2,
.solutions-row-4 {
  display: grid;
  gap: 24px;
  margin-bottom: 24px;
}

.solutions-row:last-child {
  margin-bottom: 0;
}

.solutions-row-2 {
  grid-template-columns: 1fr 1fr;
}

.solutions-row-4 {
  grid-template-columns: repeat(4, 1fr);
}

.solution-card {
  border: 1px solid var(--dhwy-border-light);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
  background: #fff;
  text-align: center;
}

.solution-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  transform: translateY(-4px);
  border-color: var(--dhwy-red);
}

.solution-card-img {
  height: 200px;
  background: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.solution-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

/* hover遮罩 + 按钮 */
.solution-card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

.solution-card:hover .solution-card-overlay {
  opacity: 1;
}

.solution-card-overlay span {
  padding: 8px 24px;
  border: 2px solid #fff;
  border-radius: 4px;
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.3s ease;
}

.solution-card:hover .solution-card-overlay span {
  background: var(--dhwy-red);
  border-color: var(--dhwy-red);
}

.solution-card-body {
  padding: 20px 16px;
}

.solution-card-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--dhwy-text-dark);
  margin: 0 0 8px;
}

.solution-card-body p {
  font-size: 0.8125rem;
  color: #999;
  margin: 0;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.solution-card-more {
  display: none;
}

@media (max-width: 1024px) {
  .solution-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .solution-grid { grid-template-columns: 1fr; }
}

brand-link:hover { text-decoration: underline; }

/* 新闻列表项已存在, 补充 */
.solution-card-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dhwy-red);
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.solution-card:hover .solution-card-link {
  transform: translateX(4px);
}

/* ---- 关于摘要（背景图+遮罩） ---- */
.about-banner {
  position: relative;
  min-height: 700px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.about-banner-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.about-banner-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.72);
  z-index: 1;
}

.about-banner-content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 80px 0;
  color: var(--dhwy-white);
}

.about-banner .section-header p {
  color: var(--dhwy-white);
  line-height: 1.75;
  max-width: none;
}

.about-banner .section-header {
  max-width: none;
}

.about-banner .text-center {
  margin-top: 72px;
}

.about-banner .section-header h2 {
  color: var(--dhwy-white);
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  text-align: center;
  margin-top: var(--space-6);
}

.stat-item .stat-number {
  font-size: 3rem;
  font-weight: 900;
  color: var(--dhwy-red);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.stat-item .stat-label {
  font-size: 0.875rem;
  color: var(--dhwy-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---- 新闻列表 ---- */
.news-list {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--space-2);
  max-width: 800px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-bottom: 1px solid var(--dhwy-border-light);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.news-item:hover {
  color: var(--dhwy-red);
}

.news-date {
  font-size: 0.75rem;
  color: var(--dhwy-text-gray);
  background: var(--dhwy-bg-gray);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
}

.news-title {
  flex: 1;
  font-size: 1rem;
  font-weight: 500;
}

.news-arrow {
  color: var(--dhwy-red);
  font-size: 1.25rem;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.news-item:hover .news-arrow {
  transform: translateX(4px);
}

.view-more {
  text-align: center;
  margin-top: var(--space-4);
}

/* ---- 页脚 ---- */
.footer {
  background: var(--dhwy-dark-2);
  color: var(--dhwy-text-muted);
  padding: var(--space-10) 0 0;
  border-top: 1px solid var(--dhwy-border);
}

/* 三栏主区域 */
.footer-main {
  display: grid;
  grid-template-columns: 280px 1fr 260px;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

/* ---- 左：联系方式 ---- */
.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-logo-img {
  height: 36px;
  width: auto;
}

.footer-logo-text-img {
  height: 28px;
  width: auto;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--dhwy-text-muted);
}

.footer-contact-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--dhwy-text-muted);
}

.footer-contact-item a {
  color: var(--dhwy-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-contact-item a:hover {
  color: var(--dhwy-white);
}

/* ---- 中：导航列 ---- */
.footer-nav {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
}

.footer-nav-col h4 {
  color: var(--dhwy-white);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-nav-col a {
  display: block;
  font-size: 0.8125rem;
  color: var(--dhwy-text-muted);
  padding: 3px 0;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-nav-col a:hover {
  color: var(--dhwy-white);
}

/* ---- 右：二维码 ---- */
.footer-qr-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-qr-item {
  text-align: center;
}

.footer-qr-img {
  width: 110px;
  height: 110px;
  border-radius: 6px;
  display: block;
  margin-bottom: 8px;
  object-fit: contain;
  background: #fff;
  padding: 4px;
}

.footer-qr-item p {
  font-size: 0.75rem;
  color: var(--dhwy-text-muted);
  margin: 0;
}

/* 友情链接（独立行） */
.footer-friend-links {
  font-size: 0.75rem;
  padding: 12px 0;
  margin-top: var(--space-4);
  border-top: 1px solid var(--dhwy-border);
}

.footer-friend-links span {
  color: var(--dhwy-text-muted);
}

.footer-friend-links a {
  color: var(--dhwy-text-muted);
  text-decoration: none;
  margin-right: 8px;
  transition: color var(--transition-fast);
}

.footer-friend-links a:hover {
  color: var(--dhwy-white);
}

/* 底部版权 */
.footer-bottom {
  border-top: 1px solid var(--dhwy-border);
  padding: var(--space-3) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
}

/* ---- 面包屑 ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.875rem;
  color: var(--dhwy-text-muted);
  margin-bottom: var(--space-4);
}

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

.breadcrumb a:hover {
  color: var(--dhwy-white);
}

.breadcrumb .separator {
  margin: 0 4px;
}

.breadcrumb .current {
  color: var(--dhwy-white);
}

/* ---- 页面Hero ---- */
.page-hero {
  background: var(--dhwy-dark);
  padding: 120px 0 var(--space-10);
  color: var(--dhwy-white);
  text-align: center;
}

.page-hero h1 {
  margin-bottom: var(--space-2);
}

/* ---- 产品中心新样式 ---- */
.products-hero {
  background: var(--dhwy-dark);
  padding: 100px 0 60px;
}

/* 品牌筛选横排标签 */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dhwy-text-dark);
  white-space: nowrap;
}

.filter-tag {
  padding: 6px 16px;
  border: 1px solid var(--dhwy-border-light);
  border-radius: 20px;
  font-size: 0.8125rem;
  color: var(--dhwy-text-gray);
  background: #fff;
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-tag:hover {
  border-color: var(--dhwy-red);
  color: var(--dhwy-red);
}

.filter-tag.active {
  background: var(--dhwy-red);
  border-color: var(--dhwy-red);
  color: var(--dhwy-white);
}

/* 分类区块标题 */
.prod-section-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--dhwy-text-dark);
}

/* 产品网格 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

@media (max-width: 1024px) {
  .product-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 授权品牌行 */
.prod-brand-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.prod-brand-line {
  width: 3px;
  height: 18px;
  background: var(--dhwy-red);
  border-radius: 2px;
}

.prod-brand-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--dhwy-text-dark);
}

.prod-brand-row {
  display: flex;
  gap: 20px;
}

.prod-brand-card img {
  width: 150px;
  height: 90px;
  object-fit: contain;
  background: #f5f5f5;
  border-radius: 8px;
  padding: 16px;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: all 0.3s ease;
}

.prod-brand-card img:hover {
  filter: grayscale(0%);
  opacity: 1;
}

/* 分类产品区块 */
.prod-cat-section {
  margin-bottom: 48px;
}

.prod-cat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--dhwy-red);
}

.prod-cat-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dhwy-text-dark);
  margin: 0;
}

.prod-cat-header span {
  font-size: 0.875rem;
  color: var(--dhwy-text-gray);
}

/* 混合网格：大图 + 产品（5列） */
.prod-mixed-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

/* 分类大图：占2列宽，高度与商品卡片对齐 */
.prod-cat-bigimg {
  grid-column: span 2;
  border-radius: 8px;
  overflow: hidden;
  background: #f5f5f5;
}

.prod-cat-bigimg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 无产品占位 */
.prod-cat-empty {
  grid-column: 3 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #bbb;
  font-size: 0.875rem;
  min-height: 100px;
}

/* 占位 */
.product-card-placeholder {
  display: none;
}

@media (max-width: 1024px) {
  .prod-mixed-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .prod-cat-bigimg {
    aspect-ratio: auto;
    min-height: 250px;
  }
}

@media (max-width: 768px) {
  .prod-mixed-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .prod-cat-bigimg {
    grid-column: 1 / -1;
    grid-row: auto;
    aspect-ratio: 2 / 1;
    min-height: 160px;
  }
}

@media (max-width: 480px) {
  .prod-mixed-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .prod-cat-bigimg {
    min-height: 180px;
  }
}

/* ---- 产品筛选页（旧版保留兼容） ---- */
.products-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-4);
}

.filter-panel {
  background: var(--dhwy-bg-gray);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  align-self: start;
  position: sticky;
  top: 80px;
}

.filter-group {
  margin-bottom: var(--space-3);
}

.filter-group h4 {
  font-size: 0.875rem;
  margin-bottom: var(--space-2);
  color: var(--dhwy-text-dark);
}

.filter-group label {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.875rem;
  color: var(--dhwy-text-gray);
  padding: 4px 0;
  cursor: pointer;
}

.filter-group input[type="checkbox"] {
  accent-color: var(--dhwy-red);
}

.filter-group input[type="number"] {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.filter-price-row {
  display: flex;
  gap: var(--space-1);
  align-items: center;
  font-size: 0.8125rem;
  color: var(--dhwy-text-gray);
}

.filter-price-row input {
  width: 80px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.product-card-detailed {
  background: var(--dhwy-white);
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
  position: relative;
}

.product-card-detailed::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--dhwy-red);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  z-index: 1;
}

.product-card-detailed:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--dhwy-red);
  transform: translateY(-4px);
}

.product-card-detailed:hover::before {
  transform: scaleX(1);
}

.product-card-detailed .product-card-img {
  height: 200px;
}

.product-card-detailed .brand-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(0,0,0,0.7);
  color: var(--dhwy-white);
  padding: 2px 10px;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  z-index: 2;
}

.product-card-detailed .product-card-body h4 {
  font-size: 0.9375rem;
}

.product-params {
  font-size: 0.8125rem;
  color: var(--dhwy-text-gray);
  margin-bottom: var(--space-2);
}

.product-params span {
  display: block;
  margin-bottom: 2px;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-1);
  margin-top: var(--space-6);
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--dhwy-text-dark);
  transition: all var(--transition-fast);
}

.pagination a:hover {
  border-color: var(--dhwy-red);
  color: var(--dhwy-red);
}

.pagination a.active {
  background: var(--dhwy-red);
  color: var(--dhwy-white);
  border-color: var(--dhwy-red);
}

.pagination .ellipsis {
  border: none;
}

/* ---- 产品详情页 ---- */
.product-detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.product-gallery {
  position: relative;
}

.product-gallery-main {
  width: 100%;
  height: 400px;
  background: var(--dhwy-bg-gray);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dhwy-text-gray);
  margin-bottom: var(--space-2);
}

.product-gallery-thumbs {
  display: flex;
  gap: var(--space-1);
}

.product-gallery-thumb {
  width: 72px;
  height: 72px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--dhwy-bg-gray);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.product-gallery-thumb.active {
  border-color: var(--dhwy-red);
}

.product-info h1 {
  font-size: 1.75rem;
  margin-bottom: var(--space-1);
}

.product-info .brand {
  color: var(--dhwy-text-gray);
  font-size: 0.9375rem;
  margin-bottom: var(--space-2);
}

.product-info .product-price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--dhwy-red);
  margin-bottom: var(--space-3);
}

.stock-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  margin-bottom: var(--space-3);
}

.stock-status.in-stock {
  color: #2ecc71;
}

.stock-status.out-of-stock {
  color: var(--dhwy-red);
}

.stock-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.stock-dot.green {
  background: #2ecc71;
}

.stock-dot.red {
  background: var(--dhwy-red);
}

.quantity-selector {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: var(--space-3);
}

.quantity-selector span {
  font-size: 0.875rem;
  color: var(--dhwy-text-gray);
  margin-right: var(--space-2);
}

.quantity-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--dhwy-border-light);
  background: var(--dhwy-white);
  font-size: 1.125rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.quantity-btn:hover {
  border-color: var(--dhwy-red);
  color: var(--dhwy-red);
}

.quantity-input {
  width: 60px;
  height: 40px;
  border: 1px solid var(--dhwy-border-light);
  border-left: none;
  border-right: none;
  text-align: center;
  font-size: 0.9375rem;
}

.product-actions {
  display: flex;
  gap: var(--space-2);
}

/* 技术参数表 */
.tech-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-6);
}

.tech-table tr {
  border-bottom: 1px solid var(--dhwy-border-light);
}

.tech-table tr:nth-child(even) {
  background: var(--dhwy-bg-gray-light);
}

.tech-table th,
.tech-table td {
  padding: 12px 16px;
  font-size: 0.875rem;
  text-align: left;
}

.tech-table th {
  width: 200px;
  color: var(--dhwy-text-gray);
  font-weight: 500;
  background: var(--dhwy-bg-gray);
}

/* ---- 相关推荐 ---- */
.related-products {
  border-top: 1px solid var(--dhwy-border-light);
  padding-top: var(--space-6);
}

.related-products h3 {
  margin-bottom: var(--space-3);
}

/* ---- 解决方案详情 ---- */
.solution-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  padding: var(--space-10) 0;
  border-bottom: 1px solid var(--dhwy-border-light);
}

.solution-block:last-child {
  border-bottom: none;
}

.solution-block.image-right .solution-image {
  order: 2;
}

.solution-block.image-right .solution-text {
  order: 1;
}

.solution-image {
  height: 320px;
  background: var(--dhwy-bg-gray);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dhwy-text-gray);
}

.solution-text h2 {
  font-size: 2rem;
  margin-bottom: var(--space-2);
}

.solution-text p {
  color: var(--dhwy-text-gray);
  margin-bottom: var(--space-3);
  line-height: 1.75;
}

.solution-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.solution-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--dhwy-red-light);
  color: var(--dhwy-red);
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

/* ---- 品牌详情 ---- */
.brand-section {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-6);
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--dhwy-border-light);
  align-items: start;
}

.brand-section:last-child {
  border-bottom: none;
}

.brand-large-logo {
  width: 200px;
  height: 200px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(204,0,0,0.08), rgba(204,0,0,0.02));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--dhwy-red);
}

.brand-intro h2 {
  font-size: 1.75rem;
  margin-bottom: var(--space-2);
}

.brand-intro p {
  color: var(--dhwy-text-gray);
  line-height: 1.75;
  margin-bottom: var(--space-3);
}

.brand-products-mini {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.brand-product-mini {
  padding: var(--space-2);
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  text-align: center;
  transition: border-color var(--transition-fast);
}

.brand-product-mini:hover {
  border-color: var(--dhwy-red);
}

.authorization-note {
  background: var(--dhwy-bg-gray);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--dhwy-text-gray);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ---- 关于我们 ---- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}

.about-image {
  height: 380px;
  background: var(--dhwy-bg-gray);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dhwy-text-gray);
}

.about-text p {
  color: var(--dhwy-text-gray);
  line-height: 1.75;
  margin-bottom: var(--space-2);
}

/* 时间轴 */
.timeline {
  position: relative;
  padding-left: 40px;
  max-width: 600px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--dhwy-border-light);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-5);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -31px;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--dhwy-red);
  border-radius: 50%;
  border: 3px solid var(--dhwy-white);
  box-shadow: 0 0 0 2px var(--dhwy-red);
}

.timeline-year {
  font-size: 0.875rem;
  color: var(--dhwy-red);
  font-weight: 700;
  margin-bottom: 4px;
}

.timeline-content {
  font-size: 0.9375rem;
  color: var(--dhwy-text-gray);
  line-height: 1.6;
}

/* ---- 新闻列表页 ---- */
.news-list-full {
  max-width: 800px;
  margin: 0 auto;
}

.news-list-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--dhwy-border-light);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.news-list-item:hover {
  color: var(--dhwy-red);
}

.news-date-block {
  width: 64px;
  height: 64px;
  background: var(--dhwy-dark);
  color: var(--dhwy-white);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.news-date-block .day {
  font-size: 1.5rem;
  line-height: 1;
  margin-bottom: 2px;
}

.news-date-block .month {
  font-size: 0.75rem;
  color: var(--dhwy-text-muted);
}

.news-item-content h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-1);
}

.news-item-content p {
  font-size: 0.875rem;
  color: var(--dhwy-text-gray);
  line-height: 1.6;
}

/* ---- 联系我们 ---- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.contact-info h2 {
  font-size: 1.75rem;
  margin-bottom: var(--space-4);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-size: 0.9375rem;
  color: var(--dhwy-text-dark);
}

.contact-info-icon {
  width: 40px;
  height: 40px;
  background: var(--dhwy-red-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.125rem;
}

.qr-placeholder {
  width: 120px;
  height: 120px;
  background: var(--dhwy-bg-gray);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--dhwy-text-gray);
  text-align: center;
}

/* 表单 */
.contact-form {
  background: var(--dhwy-bg-gray);
  padding: var(--space-5);
  border-radius: var(--radius-md);
}

.contact-form h3 {
  margin-bottom: var(--space-3);
}

.form-group {
  margin-bottom: var(--space-3);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  color: var(--dhwy-text-dark);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast);
  background: var(--dhwy-white);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--dhwy-red);
  box-shadow: 0 0 0 3px var(--dhwy-red-light);
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.form-group .error-msg {
  font-size: 0.75rem;
  color: var(--dhwy-red);
  margin-top: 4px;
  display: none;
}

.form-group.error input,
.form-group.error textarea {
  border-color: var(--dhwy-red);
}

.form-group.error .error-msg {
  display: block;
}

.form-success {
  padding: var(--space-4);
  background: rgba(46, 204, 113, 0.1);
  border: 1px solid #2ecc71;
  border-radius: var(--radius-sm);
  color: #27ae60;
  font-size: 0.9375rem;
  text-align: center;
  display: none;
}

/* 地图占位 */
.map-placeholder {
  width: 100%;
  height: 320px;
  background: var(--dhwy-bg-gray);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dhwy-text-gray);
  font-size: 0.9375rem;
  margin-top: var(--space-6);
}

/* ---- 购物车 ---- */
.cart-table {
  width: 100%;
  border-collapse: collapse;
}

.cart-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: var(--dhwy-text-gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--dhwy-border-light);
}

.cart-table td {
  padding: 16px;
  border-bottom: 1px solid var(--dhwy-border-light);
  vertical-align: middle;
}

.cart-product {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cart-product-img {
  width: 64px;
  height: 64px;
  background: var(--dhwy-bg-gray);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.cart-product-name {
  font-size: 0.9375rem;
  font-weight: 500;
}

.cart-delete {
  color: var(--dhwy-text-gray);
  font-size: 1.25rem;
  transition: color var(--transition-fast);
}

.cart-delete:hover {
  color: var(--dhwy-red);
}

.cart-summary {
  margin-top: var(--space-5);
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-4);
}

.cart-total-label {
  font-size: 1.125rem;
  color: var(--dhwy-text-gray);
}

.cart-total-price {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--dhwy-red);
}

.cart-empty {
  text-align: center;
  padding: var(--space-10) 0;
  color: var(--dhwy-text-gray);
}

.cart-empty-icon {
  font-size: 4rem;
  margin-bottom: var(--space-3);
  opacity: 0.3;
}

.cart-empty h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
  color: var(--dhwy-text-dark);
}

/* ---- Toast提示 ---- */
.toast {
  position: fixed;
  top: 80px;
  right: 24px;
  background: var(--dhwy-dark);
  color: var(--dhwy-white);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  z-index: 2000;
  opacity: 0;
  transform: translateX(100%);
  transition: all var(--transition-base);
  border-left: 3px solid var(--dhwy-red);
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

/* ---- 辅助工具 ---- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.pt-6 { padding-top: var(--space-6); }
.bg-dark { background: var(--dhwy-dark); }
.bg-dark-2 { background: var(--dhwy-dark-2); }
.bg-gray { background: var(--dhwy-bg-gray); }
.text-white { color: var(--dhwy-white); }

/* ---- 产品横排列表 (Item 6) ---- */
.product-list-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 18px;
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  transition: all var(--transition-fast);
  background: var(--dhwy-white);
}

.product-list-row:hover {
  border-color: var(--dhwy-red);
  box-shadow: var(--shadow-sm);
}

.product-list-img {
  width: 120px;
  height: 80px;
  flex-shrink: 0;
  background: var(--dhwy-bg-gray);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dhwy-text-gray);
  font-size: 0.75rem;
}

.product-list-info {
  flex: 1;
  min-width: 0;
}

.product-list-name {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-list-info h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-list-info .model {
  font-size: 0.75rem;
  color: var(--dhwy-text-gray);
}

.product-list-brand {
  font-size: 0.75rem;
  color: var(--dhwy-text-gray);
  margin-bottom: 4px;
  white-space: nowrap;
  flex-shrink: 0;
}

.product-list-price {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dhwy-red);
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 100px;
  text-align: right;
}

.product-list-params {
  font-size: 0.75rem;
  color: var(--dhwy-text-gray);
}

.product-list-arrow {
  color: var(--dhwy-red);
  font-size: 1.2rem;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.product-list-row:hover .product-list-arrow {
  transform: translateX(4px);
}

/* ---- 方案清单式 (Item 7) ---- */
.solution-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.solution-list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-size: 0.875rem;
}

.solution-list-item:hover {
  border-color: var(--dhwy-red);
  color: var(--dhwy-red);
}

.solution-list-icon {
  width: 36px;
  height: 36px;
  background: var(--dhwy-red-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.solution-list-text {
  font-weight: 500;
}

.solution-list-arrow {
  color: var(--dhwy-red);
  margin-left: auto;
  transition: transform var(--transition-fast);
}

.solution-list-item:hover .solution-list-arrow {
  transform: translateX(4px);
}

.solution-list-desc {
  color: var(--dhwy-text-gray);
  font-size: 0.75rem;
  margin-left: auto;
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.solution-list-item:hover .solution-list-desc {
  opacity: 1;
  color: var(--dhwy-red);
}

/* 方案详情页 - 统一列表 */
.solution-detail-list {
  max-width: 900px;
  margin: 0 auto;
}

.solution-detail-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--dhwy-border-light);
  transition: all var(--transition-fast);
}

.solution-detail-item:hover {
  background: var(--dhwy-bg-gray-light);
}

.solution-detail-icon {
  width: 48px;
  height: 48px;
  background: var(--dhwy-red-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.solution-detail-item h3 {
  font-size: 1.125rem;
  min-width: 140px;
}

.solution-detail-item .desc {
  flex: 1;
  color: var(--dhwy-text-gray);
  font-size: 0.875rem;
}

.solution-detail-item .tags {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.solution-detail-item .arrow {
  color: var(--dhwy-red);
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* ---- 品牌2×2紧凑卡片 (Item 5) ---- */
.brand-grid-compact {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.brand-grid-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.brand-compact-card {
  background: var(--dhwy-white);
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.brand-compact-card:hover {
  border-color: var(--dhwy-red);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.brand-compact-card .brand-color-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.brand-compact-card h3 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.brand-compact-card p {
  font-size: 0.875rem;
  color: var(--dhwy-text-gray);
  margin-bottom: 8px;
}

.brand-compact-card h4 {
  font-size: 1.125rem;
  margin: 8px 0 4px;
}

.brand-mini-products {
  font-size: 0.75rem;
  color: var(--dhwy-text-gray);
  margin-bottom: 12px;
  line-height: 1.5;
}

.brand-arrow {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--dhwy-red);
  font-size: 1.25rem;
  text-decoration: none;
}

.brand-compact-card .btn { margin-top: 4px; }

/* 方案列表CTA */
.solution-cta {
  color: var(--dhwy-red);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.875rem;
  flex-shrink: 0;
  margin-left: auto;
}
.solution-cta:hover { text-decoration: underline; }

/* 产品列表名称 */
.product-list-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--dhwy-text-dark);
  margin-bottom: 2px;
}

.brand-compact-card .brand-link {
  font-size: 0.8125rem;
  color: var(--dhwy-red);
  font-weight: 600;
}

.brand-compact-card .brand-link:hover {
  text-decoration: underline;
}

.brand-arrow {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--dhwy-red);
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.brand-compact-card:hover .brand-arrow {
  transform: translateX(4px);
}

/* ---- 登录/注册页 (Item 3) ---- */
.auth-page {
  min-height: 100vh;
  background: var(--dhwy-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 20px 40px;
}

.auth-card {
  background: var(--dhwy-white);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 420px;
  padding: 40px 36px;
  box-shadow: var(--shadow-lg);
}

.auth-card h2 {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.auth-card .auth-subtitle {
  text-align: center;
  color: var(--dhwy-text-gray);
  font-size: 0.875rem;
  margin-bottom: 28px;
}

.auth-tabs {
  display: flex;
  border-bottom: 2px solid var(--dhwy-border-light);
  margin-bottom: 28px;
}

.auth-tab {
  flex: 1;
  text-align: center;
  padding: 12px 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--dhwy-text-gray);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-fast);
}

.auth-tab.active {
  color: var(--dhwy-red);
  border-bottom-color: var(--dhwy-red);
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: block;
}

.auth-form .form-group {
  margin-bottom: 18px;
}

.auth-form .form-group label {
  display: block;
  font-size: 0.8125rem;
  color: var(--dhwy-text-dark);
  margin-bottom: 6px;
  font-weight: 500;
}

.auth-form .form-group input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast);
}

.auth-form .form-group input:focus {
  outline: none;
  border-color: var(--dhwy-red);
  box-shadow: 0 0 0 3px var(--dhwy-red-light);
}

.auth-form .form-group.error input {
  border-color: var(--dhwy-red);
}

.auth-form .form-group .error-msg {
  display: none;
  font-size: 0.75rem;
  color: var(--dhwy-red);
  margin-top: 4px;
}

.auth-form .form-group.error .error-msg {
  display: block;
}

.auth-sms-row {
  display: flex;
  gap: 8px;
}

.auth-sms-row input {
  flex: 1;
}

.auth-sms-row .btn-send-sms {
  padding: 10px 16px;
  background: var(--dhwy-bg-gray);
  border: 1px solid var(--dhwy-border-light);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  color: var(--dhwy-text-dark);
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-sms-row .btn-send-sms:hover {
  border-color: var(--dhwy-red);
  color: var(--dhwy-red);
}

.auth-sms-row .btn-send-sms:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.auth-form .btn-submit {
  width: 100%;
  padding: 12px 24px;
  background: var(--dhwy-red);
  color: var(--dhwy-white);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
  margin-top: 8px;
}

.auth-form .btn-submit:hover {
  background: var(--dhwy-red-deep);
}

.auth-form .forgot-link {
  display: block;
  text-align: right;
  font-size: 0.8125rem;
  color: var(--dhwy-text-gray);
  margin-top: 12px;
}

.auth-form .forgot-link:hover {
  color: var(--dhwy-red);
}

.auth-form .api-note {
  font-size: 0.6875rem;
  color: var(--dhwy-text-gray);
  text-align: center;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--dhwy-border-light);
}

/* ---- 过度滚动条 ---- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--dhwy-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--dhwy-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--dhwy-red);
}

/* ============================================
   响应式
   ============================================ */

/* Tablet: 768-1023px */
@media (max-width: 1023px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }

  .brand-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .solutions-row-4 {
    grid-template-columns: repeat(3, 1fr);
  }

  .brand-grid-2x2 {
    grid-template-columns: 1fr;
  }

  .brand-grid-compact {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .product-cards-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .product-grid {
    display: flex;
    flex-direction: column;
  }

  .solution-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .solution-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .footer-contact {
    grid-column: 1 / -1;
  }

  .footer-nav {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
  }

  .products-layout {
    grid-template-columns: 1fr;
  }

  .filter-panel {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    padding: var(--space-2);
  }

  .filter-group {
    flex: 1;
    min-width: 120px;
    margin-bottom: 0;
  }

  .product-detail-layout {
    grid-template-columns: 1fr;
  }

  .solution-block,
  .solution-block.image-right .solution-image,
  .solution-block.image-right .solution-text {
    grid-template-columns: 1fr;
  }

  .solution-block .solution-image {
    order: -1;
    height: 240px;
  }

  .solution-block .solution-text {
    order: 0;
  }

  .brand-section {
    grid-template-columns: 200px 1fr;
  }

  .about-intro {
    grid-template-columns: 1fr;
  }

  .about-image {
    height: 280px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .cart-table {
    font-size: 0.875rem;
  }
}

/* 平板竖屏 */
@media (min-width: 768px) and (max-width: 1023px) {
  .nav-links {
    display: none;
  }

  .nav-actions {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}

/* Mobile: <768px */
@media (max-width: 767px) {
  html {
    font-size: 15px;
  }

  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }

  .page-hero {
    min-height: 260px !important;
    padding: 64px 0 32px;
  }

  .page-hero h1 {
    font-size: 1.5rem;
  }

  .page-hero p {
    font-size: 0.8125rem !important;
  }

  .page-hero .breadcrumb {
    margin-bottom: 0;
    font-size: 0.75rem;
  }

  /* 面包屑外层wrapper（absolute定位）靠底 */
  .page-hero > div[style*="absolute"] {
    bottom: 8px !important;
  }

  .hero-slider {
    aspect-ratio: 4 / 3;
  }

  .hero-image {
    object-fit: cover;
    object-position: center;
  }

  .hero-cta {
    bottom: 12%;
    padding: 8px 20px;
    font-size: 0.875rem;
  }

  .hero-dots {
    bottom: 4%;
  }

  /* 产品分类左右按钮 */
  .cat-scroll-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid #e0e0e0;
    background: rgba(255,255,255,0.92);
    color: var(--dhwy-text-gray);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s;
  }

  .cat-scroll-btn:active {
    background: var(--dhwy-red-light);
    color: var(--dhwy-red);
    border-color: var(--dhwy-red);
  }

  .cat-scroll-left {
    left: 4px;
  }

  .cat-scroll-right {
    right: 4px;
  }

  .nav-links {
    display: none;
  }

  .nav-actions {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .brand-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .solutions-row-2,
  .solutions-row-4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .brand-grid-2x2 {
    grid-template-columns: 1fr;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .product-card-img {
    height: 160px;
  }

  .product-cards-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .solution-cards {
    grid-template-columns: repeat(2, 1fr);
  }


  .footer-main {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .footer-nav {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .footer-side {
    text-align: center;
  }

  .footer-qr-row {
    justify-content: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-1);
    text-align: center;
    font-size: 0.75rem;
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .stat-item .stat-number {
    font-size: 2.25rem;
  }

  .products-layout {
    grid-template-columns: 1fr;
  }

  .filter-panel {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    position: static;
  }

  .filter-group {
    flex: 1 1 45%;
    margin-bottom: 0;
  }

  .product-detail-layout {
    grid-template-columns: 1fr;
  }

  .product-gallery-main {
    height: 280px;
  }

  .tech-table th {
    width: 120px;
  }

  .solution-block,
  .solution-block.image-right .solution-image,
  .solution-block.image-right .solution-text {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .solution-block .solution-image {
    order: -1;
    height: 200px;
  }

  .solution-block .solution-text {
    order: 0;
  }

  .solution-image {
    height: 200px;
  }

  .brand-section {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .brand-products-mini {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-intro {
    grid-template-columns: 1fr;
  }

  .about-image {
    height: 220px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .news-list-item {
    grid-template-columns: 1fr;
  }

  .news-date-block {
    display: none;
  }

  .cart-table th:nth-child(2),
  .cart-table td:nth-child(2) {
    display: none;
  }

  .cart-summary {
    flex-direction: column;
    align-items: flex-end;
  }

  .section {
    padding: var(--space-6) 0;
  }

  .product-actions {
    flex-direction: column;
  }

  .product-actions .btn {
    width: 100%;
  }

  .product-list-row {
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    gap: 10px;
  }

  .product-list-img {
    width: 100%;
    height: 160px;
  }

  .product-list-price {
    text-align: left;
  }

  .product-list-params {
    flex-direction: column;
    gap: 4px;
  }

  .solution-list {
    grid-template-columns: 1fr;
  }

  .solution-detail-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .solution-detail-item .tags {
    flex-wrap: wrap;
  }

  .auth-page {
    padding: 80px 16px 32px;
  }

  .auth-card {
    padding: 28px 20px;
  }
}