/**
 * 数智引擎 · 工业数智平台 — 主题样式
 * 工业暗色主题：深灰(#0D1117) + 钢蓝(#2C3E50) + 橙色(#E87A20) + 白
 * 硬核工业风：直角卡片 + 数据突出 + 信息密集型排版
 * 纯原生 CSS，无框架依赖
 * 字体: Inter (Latin) + Noto Sans SC (中文) + JetBrains Mono (数据)
 */



/* ============================================================
   CSS 变量体系
   ============================================================ */
:root {
  /* 基底色 — 深灰工业 */
  --bg-deep: #0D1117;
  --bg-night: #111820;
  --bg-card: #161B22;
  --bg-card-hover: #1C2330;
  --bg-input: #1A1F2A;
  --bg-overlay: rgba(0, 0, 0, 0.65);

  /* 点缀色 — 工业强调 */
  --orange: #E87A20;
  --orange-hover: #F08C3A;
  --orange-dim: rgba(232, 122, 32, 0.15);
  --orange-glow: rgba(232, 122, 32, 0.25);
  --steel: #2C3E50;
  --steel-light: #3D5266;
  --steel-dim: rgba(44, 62, 80, 0.4);
  --accent: #E87A20;

  /* 文字色阶 */
  --text-primary: #E8ECF4;
  --text-secondary: #8B9CB3;
  --text-muted: #4A5568;
  --text-white: #FFFFFF;

  /* 边框 */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-card: rgba(255, 255, 255, 0.08);
  --border-steel: rgba(44, 62, 80, 0.5);
  --border-orange: rgba(232, 122, 32, 0.3);

  /* 阴影 */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(232, 122, 32, 0.08);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.6);

  /* 圆角 — 直角为主 */
  --radius-none: 0;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 6px;

  /* 间距 */
  --section-py: 96px;
  --container-max: 1260px;
  --header-h: 68px;

  /* 过渡 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-industrial: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;

  /* 字体 */
  --font-heading: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --font-data: 'JetBrains Mono', 'DIN', 'DIN Alternate', 'Courier New', monospace;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg-deep);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background: var(--orange-dim);
  color: var(--orange);
}

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

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

ul, ol { list-style: none; }

/* ============================================================
   容器 & 布局工具
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-py) 0;
  position: relative;
}

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

.section--darker {
  background: var(--bg-deep);
}

/* 区块标签 */
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 12px;
  position: relative;
  padding-left: 28px;
}

.section-tag::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 2px;
  background: var(--orange);
}

.section-tag--white::before { background: #fff; }

.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  max-width: 600px;
}

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-body);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-industrial);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.btn--primary {
  background: var(--orange);
  color: #fff;
  border-color: var(--orange);
}

.btn--primary:hover {
  background: var(--orange-hover);
  border-color: var(--orange-hover);
  box-shadow: 0 4px 20px var(--orange-glow);
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-steel);
}

.btn--outline:hover {
  border-color: var(--orange);
  color: var(--orange);
  background: var(--orange-dim);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
  padding: 10px 20px;
}

.btn--ghost:hover {
  color: var(--orange);
}

.btn--sm {
  padding: 8px 18px;
  font-size: 0.82rem;
}

.btn--lg {
  padding: 16px 36px;
  font-size: 1rem;
}

/* CTA脉冲动画 */
.pulse {
  animation: pulse-orange 2s ease-in-out infinite;
}

@keyframes pulse-orange {
  0%, 100% { box-shadow: 0 0 0 0 var(--orange-glow); }
  50% { box-shadow: 0 0 0 12px rgba(232, 122, 32, 0); }
}

/* ============================================================
   Header / 导航 (13.3 z-index, 13.4 hamburger独立, 13.11 实底)
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--duration-normal), box-shadow var(--duration-normal);
}

.header.scrolled {
  background: rgba(13, 17, 23, 0.98);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.header__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header__logo-icon {
  width: 38px;
  height: 38px;
  background: var(--orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #fff;
}

.header__logo-text {
  display: flex;
  flex-direction: column;
}

.header__logo-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.header__logo-sub {
  font-size: 0.6rem;
  color: var(--orange);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* 主导航 */
.header__nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.header__nav-link,
.header__nav-item > a {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--duration-fast);
  white-space: nowrap;
}

.header__nav-link:hover,
.header__nav-item:hover > a,
.header__nav-link.active {
  color: var(--orange);
}

/* 下拉菜单 (13.3 z-index) */
.header__nav-item {
  position: relative;
}

.header__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 60;
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border-steel);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--duration-normal) var(--ease-industrial);
}

.header__nav-item:hover .header__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header__dropdown a {
  display: block;
  padding: 11px 18px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-fast);
}

.header__dropdown a:last-child { border-bottom: none; }

.header__dropdown a:hover {
  background: var(--orange-dim);
  color: var(--orange);
}

/* 右侧操作 */
.header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header__cta {
  background: var(--orange);
  color: #fff;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--duration-normal);
}

.header__cta:hover {
  background: var(--orange-hover);
  box-shadow: 0 4px 16px var(--orange-glow);
}

/* 汉堡菜单 — 独立于 header__actions (13.4) */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 110;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--duration-normal);
  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);
}

/* 移动端侧滑菜单 */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: var(--bg-card);
  z-index: 105;
  overflow-y: auto;
  transition: right var(--duration-slow) var(--ease-industrial);
  box-shadow: -4px 0 30px rgba(0, 0, 0, 0.5);
}

.mobile-nav.active { right: 0; }

.mobile-nav__inner { padding: 24px 20px; }

.mobile-nav__link {
  display: block;
  padding: 14px 16px;
  font-size: 1rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}

.mobile-nav__link:hover { color: var(--orange); }

.mobile-nav__sub {
  padding-left: 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal);
}

.mobile-nav__sub.open { max-height: 500px; }

.mobile-nav__sub a {
  display: block;
  padding: 10px 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.mobile-nav__sub a:hover { color: var(--orange); }

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 104;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal);
}

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

/* ============================================================
   Banner / Hero 轮播
   ============================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  background: var(--bg-deep);
}

.hero-swiper {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__slide {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, rgba(13, 17, 23, 0.92) 0%, rgba(13, 17, 23, 0.7) 50%, rgba(13, 17, 23, 0.4) 100%);
}

.hero__content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  color: var(--text-white);
  line-height: 1.15;
  margin-bottom: 20px;
  max-width: 700px;
  letter-spacing: -0.02em;
}

.hero__title span {
  color: var(--orange);
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  animation: bounce-down 2s infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--orange), transparent);
}

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

.hero-pagination {
  position: absolute;
  bottom: 120px;
  left: 24px;
  z-index: 3;
  display: flex;
  gap: 8px;
}

.hero-pagination .swiper-pagination-bullet {
  width: 40px;
  height: 3px;
  background: rgba(255, 255, 255, 0.3);
  opacity: 1;
  border-radius: 0;
  transition: all var(--duration-normal);
}

.hero-pagination .swiper-pagination-bullet-active {
  background: var(--orange);
  width: 60px;
}

/* ============================================================
   数据滚动区
   ============================================================ */
.stats-strip {
  padding: 48px 0;
  background: var(--bg-night);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

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

.stat-item {
  padding: 20px;
}

.stat-item__number {
  font-family: var(--font-data);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--orange);
  line-height: 1.1;
  margin-bottom: 8px;
}

.stat-item__number .unit {
  font-size: 1.5rem;
  font-weight: 600;
}

.stat-item__label {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.stat-item__suffix {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ============================================================
   卡片系统
   ============================================================ */
/* 基础卡片 */
.card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-industrial);
  overflow: hidden;
}

.card:hover {
  border-color: var(--border-steel);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.card__image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--bg-night);
}

.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-industrial);
}

.card:hover .card__image img {
  transform: scale(1.06);
}

.card__image--contain img {
  object-fit: contain;
  padding: 24px;
}

.card__body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card__tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 8px;
}

.card__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 12px;
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.card__meta i { color: var(--orange); margin-right: 4px; }

.card__price {
  font-family: var(--font-data);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--orange);
}

/* 数据卡片（工业数据突出） */
.card--data {
  border-left: 3px solid var(--orange);
}

.card--data .card__title {
  font-family: var(--font-data);
  font-size: 1.6rem;
  color: var(--orange);
}

/* ============================================================
   列表网格
   ============================================================ */
.list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.list-header h1 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

/* 画廊网格（案例/白皮书） */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ============================================================
   解决方案卡片（行业） */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.solution-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal);
}

.solution-card:hover {
  border-color: var(--orange);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
}

.solution-card__icon {
  font-size: 2.2rem;
  color: var(--orange);
  margin-bottom: 14px;
}

.solution-card__name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.solution-card__desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ============================================================
   技术能力卡片
   ============================================================ */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.tech-card {
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  text-align: center;
  transition: all var(--duration-normal);
}

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

.tech-card__icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--orange-dim);
  font-size: 1.5rem;
  color: var(--orange);
}

.tech-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.tech-card__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============================================================
   内容详情页
   ============================================================ */
.detail {
  max-width: 900px;
  margin: 0 auto;
}

.detail__header {
  margin-bottom: 28px;
}

.detail__title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  line-height: 1.3;
}

.detail__meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.detail__meta-row i {
  color: var(--orange);
  margin-right: 4px;
}

.detail__params {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.detail__param {
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  text-align: center;
}

.detail__param-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.detail__param-value {
  font-family: var(--font-data);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.detail__body {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.9;
}

.detail__body h2,
.detail__body h3 {
  color: var(--text-primary);
  margin: 32px 0 16px;
  font-weight: 700;
}

.detail__body p { margin-bottom: 16px; }
.detail__body img { margin: 24px 0; border: 1px solid var(--border-subtle); }
.detail__body ul, .detail__body ol { padding-left: 20px; margin-bottom: 16px; }
.detail__body li { list-style: disc; margin-bottom: 6px; color: var(--text-secondary); }

.detail__pager {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  margin-top: 48px;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  color: var(--text-muted);
  gap: 16px;
  flex-wrap: wrap;
}

.detail__pager a {
  color: var(--orange);
  font-weight: 600;
}

.detail__pager a:hover { text-decoration: underline; }

.related-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 48px 0 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ============================================================
   内页 Banner
   ============================================================ */
.inner-banner {
  position: relative;
  height: 320px;
  overflow: hidden;
  margin-top: var(--header-h);
}

.inner-banner__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.inner-banner__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(13, 17, 23, 0.7), rgba(13, 17, 23, 0.9));
  z-index: 1;
}

.inner-banner__content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.inner-banner__title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.inner-banner__subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb-bar {
  background: var(--bg-night);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
}

.breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--orange); }
.breadcrumb i { margin: 0 8px; font-size: 0.6rem; color: var(--text-muted); }

/* ============================================================
   过滤器/子导航 (sticky)
   ============================================================ */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.filter-bar a {
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  border: 1px solid transparent;
  transition: all var(--duration-fast);
}

.filter-bar a:hover,
.filter-bar a.active {
  color: var(--orange);
  border-color: var(--orange);
}

/* ============================================================
   搜索
   ============================================================ */
.search-box {
  max-width: 700px;
  margin: 0 auto;
  padding: 48px 0 32px;
}

.search-form-row {
  display: flex;
  gap: 12px;
}

.search-input-wrap {
  flex: 1;
  position: relative;
}

.search-input-wrap i {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.95rem;
}

.search-input-wrap input {
  width: 100%;
  padding: 14px 16px 14px 44px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-body);
  outline: none;
  transition: border-color var(--duration-fast);
}

.search-input-wrap input:focus {
  border-color: var(--orange);
}

.search-result-item {
  display: flex;
  gap: 20px;
  padding: 20px;
  border: 1px solid var(--border-subtle);
  margin-bottom: 12px;
  transition: all var(--duration-normal);
}

.search-result-item:hover {
  border-color: var(--border-steel);
  background: var(--bg-card);
}

.search-result-item__thumb {
  width: 160px;
  height: 110px;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--bg-night);
}

.search-result-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.search-result-item__info { flex: 1; }

.search-result-item__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.search-result-item__title:hover { color: var(--orange); }

.search-result-item__date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.search-result-item__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  margin-top: 48px;
  padding: 20px 0;
}

.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 10px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-fast);
}

.pagination a:hover,
.pagination a.active {
  color: var(--orange);
  border-color: var(--orange);
  background: var(--orange-dim);
}

.pagination a.disabled {
  opacity: 0.3;
  pointer-events: none;
}

/* ============================================================
   表单
   ============================================================ */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.required { color: var(--orange); }

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font-body);
  outline: none;
  transition: border-color var(--duration-fast);
}

.form-control:focus { border-color: var(--orange); }

textarea.form-control { resize: vertical; min-height: 100px; }

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238B9CB3' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

/* 联系表单卡片 */
.contact-form-card {
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-steel);
}

.contact-form-card h3 {
  font-family: var(--font-heading);
  color: var(--text-primary);
}

/* 联系信息 */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info__item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-info__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--orange-dim);
  color: var(--orange);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-info__label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2px;
  letter-spacing: 0.06em;
}

.contact-info__value {
  font-size: 1rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* ============================================================
   CTA 区
   ============================================================ */
.cta-section {
  padding: 80px 0;
  text-align: center;
  background: var(--bg-night);
  border-top: 3px solid var(--orange);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, var(--orange-dim) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section__title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

/* 订阅卡片 */
.subscribe-card {
  max-width: 560px;
  margin: 0 auto;
  padding: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-steel);
  text-align: center;
}

.subscribe-form {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.subscribe-form input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font-body);
  outline: none;
}

.subscribe-form input:focus { border-color: var(--orange); }

/* ============================================================
   关于我们
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image img {
  width: 100%;
  border: 1px solid var(--border-subtle);
}

.about-image::after {
  content: '';
  position: absolute;
  top: 16px;
  left: 16px;
  right: -16px;
  bottom: -16px;
  border: 2px solid var(--orange);
  z-index: -1;
  opacity: 0.3;
}

/* ============================================================
   页脚
   ============================================================ */
.footer {
  background: var(--bg-night);
  border-top: 1px solid var(--border-subtle);
}

.footer__top-line {
  height: 3px;
  background: var(--orange);
}

.footer__grid {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1fr;
  gap: 40px;
}

.footer__brand-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer__social {
  display: flex;
  gap: 12px;
}

.footer__social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all var(--duration-fast);
}

.footer__social a:hover {
  border-color: var(--orange);
  color: var(--orange);
  background: var(--orange-dim);
}

.footer__col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: 0.03em;
}

.footer__links a {
  display: block;
  padding: 5px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

.footer__links a:hover { color: var(--orange); }

.footer__contact-item {
  display: flex;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.footer__contact-item i {
  color: var(--orange);
  width: 16px;
  margin-top: 4px;
  flex-shrink: 0;
}

.footer__qrcode {
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
}

/* 友情链接 */
.friend-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 0;
  border-top: 1px solid var(--border-subtle);
}

.friend-links__label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.friend-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 2px 8px;
}

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

/* 底部版权 */
.footer__bottom {
  border-top: 1px solid var(--border-subtle);
  padding: 16px 0;
}

.footer__bottom-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer__bottom-inner a { color: var(--text-muted); }
.footer__bottom-inner a:hover { color: var(--orange); }

/* ============================================================
   返回顶部
   ============================================================ */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 90;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--orange);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--duration-normal);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.back-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover { background: var(--orange-hover); }

/* ============================================================
   空状态
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: block;
  opacity: 0.4;
}

.empty-state p {
  font-size: 0.95rem;
}

/* ============================================================
   在线客服按钮
   ============================================================ */
.online-service {
  position: fixed;
  bottom: 90px;
  right: 32px;
  z-index: 90;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--orange);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 1.3rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  animation: pulse-orange 2s infinite;
}

/* ============================================================
   数字孪生展示区
   ============================================================ */
.digital-twin {
  position: relative;
  overflow: hidden;
  background: var(--bg-deep);
}

.digital-twin__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.digital-twin__item {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.digital-twin__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.digital-twin__item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 17, 23, 0.9), transparent);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
}

.digital-twin__item-overlay h4 {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.digital-twin__item-overlay p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Canvas粒子背景 */
.particles-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ============================================================
   Tab 切换 (产品详情)
   ============================================================ */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--border-subtle);
  margin-bottom: 28px;
  gap: 0;
}

.tab-btn {
  padding: 12px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: all var(--duration-fast);
  font-family: var(--font-body);
}

.tab-btn:hover { color: var(--text-secondary); }

.tab-btn.active {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ============================================================
   白皮书/下载卡片
   ============================================================ */
.whitepaper-card {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal);
}

.whitepaper-card:hover {
  border-color: var(--orange);
  background: var(--bg-card-hover);
}

.whitepaper-card__cover {
  width: 120px;
  height: 160px;
  flex-shrink: 0;
  background: var(--bg-night);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--orange);
  font-size: 2rem;
}

.whitepaper-card__info { flex: 1; }

.whitepaper-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.whitepaper-card__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

/* ============================================================
   新闻条目
   ============================================================ */
.news-item {
  display: flex;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.news-item__thumb {
  width: 200px;
  height: 140px;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--bg-night);
}

.news-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-item__info { flex: 1; }

.news-item__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.news-item__title:hover { color: var(--orange); }

.news-item__date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.news-item__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================================
   响应式 (768px断点)
   ============================================================ */
@media (max-width: 1024px) {
  .list-grid,
  .solutions-grid,
  .gallery-grid,
  .related-grid { grid-template-columns: repeat(2, 1fr); }

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

  .footer__grid { grid-template-columns: 1fr 1fr; }

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

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

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

  .digital-twin__grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .header__nav,
  .header__actions { display: none; }

  .hamburger { display: flex; }

  .hero__title { font-size: 1.8rem; }

  /* 手机端 Hero 轮播由满屏(100vh/600px)压成紧凑横幅，避免太长 */
  .hero {
    height: 60vh;
    min-height: 380px;
    max-height: 520px;
  }

  .hero__actions { flex-direction: column; }

  .hero__scroll { display: none; }

  .section { padding: 48px 0; }

  .section-title { font-size: 1.5rem; }

  /* 轮播图下方数据区：压缩上下间距并改双列，避免手机端堆叠过长 */
  .stats-strip { padding: 28px 0; }
  .stat-item { padding: 12px; }

  .list-grid,
  .solutions-grid,
  .gallery-grid,
  .tech-grid,
  .stats-grid,
  .related-grid { grid-template-columns: 1fr; }

  /* 统计数字双列(需放在上面的 1fr 分组规则之后以生效) */
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }

  /* 产品中心列表：手机端双列更紧凑，全部文字截断(需放在 1fr 分组规则之后) */
  .product-grid,
  .home-product-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }

  .product-grid .card__title,
  .home-product-grid .card__title {
    font-size: 0.95rem;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .product-grid .card__desc,
  .home-product-grid .card__desc {
    font-size: 0.78rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .product-grid .card__tag,
  .home-product-grid .card__tag {
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .product-grid .card__meta,
  .home-product-grid .card__meta {
    flex-wrap: nowrap;
    gap: 4px;
    font-size: 0.72rem;
  }

  .product-grid .card__meta span,
  .home-product-grid .card__meta span {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .product-grid .card__price,
  .home-product-grid .card__price {
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* 行业解决方案：手机端双列，内容截断(需放在 1fr 分组规则之后) */
  .solutions-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .solution-card { padding: 16px 10px; }
  .solution-card__icon { font-size: 1.6rem; margin-bottom: 8px; }
  .solution-card__name { font-size: 0.85rem; margin-bottom: 4px; }
  .solution-card__desc {
    font-size: 0.72rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* 数字孪生·虚拟工厂：手机端只保留前2张图，双列(覆盖 ≤1024 的1fr) */
  .digital-twin__grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .digital-twin__item:nth-child(n+3) { display: none; }
  .digital-twin__item-overlay { padding: 12px; }
  .digital-twin__item-overlay h4 { font-size: 0.9rem; }

  /* 客户案例：手机端只留1个，改左图右文横排压缩 */
  .home-case-grid .card:nth-child(n+2) { display: none; }
  .home-case-grid .card { flex-direction: row; align-items: stretch; }
  .home-case-grid .card__image { aspect-ratio: auto; flex: 0 0 40%; }
  .home-case-grid .card__body { padding: 14px; }
  .home-case-grid .card--data .card__title { font-size: 1.05rem; line-height: 1.35; }
  .home-case-grid .card__desc {
    font-size: 0.78rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .home-case-grid .card__meta {
    flex-wrap: nowrap;
    gap: 8px;
    font-size: 0.72rem;
  }
  .home-case-grid .card__meta span {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* 底部CTA(开启智能制造转型之旅)：压缩留白与标题，缩短手机端高度 */
  .cta-section { padding: 44px 0; }
  .cta-section__title { font-size: 1.6rem; line-height: 1.3; margin-bottom: 10px; }
  .cta-section p[style*="max-width"] {
    font-size: 0.9rem !important;
    margin-bottom: 20px !important;
  }

  /* 解决方案列表页：条目改左封右文横排压缩(覆盖 ≤768 的纵向) */
  .sol-grid .whitepaper-card {
    flex-direction: row;
    gap: 14px;
    padding: 14px;
  }
  .sol-grid .whitepaper-card__cover {
    width: 100px;
    height: 133px;
    flex-shrink: 0;
  }
  .sol-grid .whitepaper-card__title {
    font-size: 0.95rem;
    line-height: 1.35;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .sol-grid .whitepaper-card__desc {
    font-size: 0.78rem;
    line-height: 1.45;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .sol-grid .whitepaper-card__info > div {
    gap: 10px;
  }
  .sol-grid .whitepaper-card .btn--sm {
    padding: 6px 10px;
    font-size: 0.72rem;
  }

  /* 客户案例列表页：手机端双列紧凑(需放在 1fr 分组规则之后) */
  .case-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .case-grid .card--data .card__title {
    font-size: 0.95rem;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .case-grid .card__desc {
    font-size: 0.78rem;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .case-grid .card__meta {
    flex-wrap: nowrap;
    gap: 4px;
    font-size: 0.72rem;
  }
  .case-grid .card__meta span {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .case-grid .card__tag {
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* 核心技术能力：手机端4个卡片一行(覆盖 ≤768 的1fr) */
  .tech-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .tech-card { padding: 12px 4px; min-width: 0; }
  .tech-card__icon { width: 30px; height: 30px; margin: 0 auto 8px; font-size: 0.9rem; }
  .tech-card__title { font-size: 0.72rem; line-height: 1.3; margin-bottom: 4px; }
  .tech-card__desc {
    font-size: 0.6rem;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .footer__grid > * { min-width: 0; }
  .footer__social { flex-wrap: wrap; }
  .footer__brand-desc { overflow-wrap: anywhere; }

  /* 快速链接：手机端横向排布，压缩纵向高度 */
  .footer__links { display: flex; flex-wrap: wrap; gap: 4px 18px; }
  .footer__links a { padding: 2px 0; }

  .inner-banner { height: 200px; margin-top: 60px; }

  .inner-banner__title { font-size: 1.5rem; }

  .news-item { flex-direction: column; }

  .news-item__thumb { width: 100%; height: 180px; }

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

  .subscribe-form { flex-direction: column; }

  .search-result-item { flex-direction: column; }

  .search-result-item__thumb { width: 100%; height: 160px; }

  /* ★ 修复: hero 分页圆点在移动端被 Swiper 的
     left:0/width:100% + translateX(-50%) 推到屏幕左侧之外(负坐标)。
     改为全宽 + justify-content:center 水平居中。 */
  .hero .hero-pagination {
    --swiper-pagination-bottom: 80px;
    bottom: 80px;
    left: 0;
    right: 0;
    transform: none;
    justify-content: center;
  }

  /* 移动端头部：允许 logo 收缩+省略号，避免窄屏(含 170px 测试视口)下
     汉堡按钮被挤出屏幕右侧、整体看起来偏左 */
  .header__inner { padding: 0 18px; }
  .header__logo { flex-shrink: 1; min-width: 0; }
  .header__logo-text { min-width: 0; }
  .header__logo-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* 移动端操作按钮占满整行 */
  .hero__actions .btn { width: 100%; justify-content: center; }

  /* 咨询表单：手机端改单列 */
  .form-grid { grid-template-columns: 1fr !important; }

  /* 产品详情大图：手机端减少内边距 */
  .product-detail-img { padding: 16px !important; }

  /* 验证码行：窄屏允许换行 */
  .captcha-row { flex-wrap: wrap; }
  .captcha-row input { flex: 1; width: 100% !important; }

  .back-top,
  .online-service { right: 16px; }

  .contact-form-card { padding: 24px; }

  .whitepaper-card { flex-direction: column; }

  /* 长文本(邮箱/地址等无空格单词)窄屏允许断行，避免撑破容器导致整体偏左 */
  .contact-info__value,
  .footer__contact-item span { overflow-wrap: anywhere; }

  /* 分页：窄屏允许换行，避免翻页按钮溢出屏幕右侧 */
  .pagination { flex-wrap: wrap; }

  /* 咨询/联系表单提交按钮：窄屏允许文案换行，避免长按钮文字撑破容器 */
  .contact-form-card button[type="submit"] { white-space: normal; }
}

/* 窄屏(小手机/极窄视口)进一步收紧 */
@media (max-width: 400px) {
  .header__inner { padding: 0 14px; }
  .header__logo { gap: 8px; }
  .header__logo-sub { display: none; }
  .header__logo-name { font-size: 0.92rem; }
  .header__logo-icon { width: 34px; height: 34px; font-size: 0.95rem; }

  .hero__actions .btn--lg { padding: 14px 16px; font-size: 0.92rem; }

  .section-title { font-size: 1.35rem; }

  /* 白皮书卡片：封面全宽+内边距收紧，避免固定宽度(120px)撑破窄容器 */
  .whitepaper-card { padding: 16px; }
  .whitepaper-card__cover { width: 100%; height: 150px; }

  /* CTA 区按钮：全宽堆叠，避免大号按钮(btn--lg)在窄屏居中溢出屏幕两侧 */
  .cta-section .btn { width: 100%; justify-content: center; padding: 14px 16px; font-size: 0.92rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }

  /* 白皮书(首页)：只留1个，改左封右文横排压缩(需放在 ≤400 竖排规则之后) */
  .home-wp-grid .whitepaper-card:nth-child(n+2) { display: none; }
  .home-wp-grid .whitepaper-card {
    flex-direction: row;
    gap: 14px;
    padding: 14px;
  }
  .home-wp-grid .whitepaper-card__cover {
    width: 84px;
    height: 112px;
    flex-shrink: 0;
  }
  .home-wp-grid .whitepaper-card__title {
    font-size: 0.95rem;
    line-height: 1.35;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .home-wp-grid .whitepaper-card__desc {
    font-size: 0.75rem;
    line-height: 1.4;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .home-wp-grid .whitepaper-card .btn--sm {
    padding: 6px 10px;
    font-size: 0.72rem;
  }

  /* 新闻资讯(首页/列表页)：只留1个(首页)，改左图右文横排压缩(覆盖 ≤768 的纵向) */
  .home-news .news-item:nth-child(n+2) { display: none; }
  .home-news .news-item,
  .news-grid .news-item {
    flex-direction: row;
    gap: 12px;
    padding: 0 0 14px;
  }
  .home-news .news-item__thumb,
  .news-grid .news-item__thumb {
    width: 110px;
    height: 90px;
    flex-shrink: 0;
  }
  .home-news .news-item__title,
  .news-grid .news-item__title {
    font-size: 0.95rem;
    line-height: 1.35;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .home-news .news-item__date,
  .news-grid .news-item__date { font-size: 0.72rem; margin-bottom: 6px; }
  .home-news .news-item__desc,
  .news-grid .news-item__desc {
    font-size: 0.75rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .hero__title { font-size: 1.5rem; }

  .hero__subtitle { font-size: 0.9rem; }

  .stat-item__number { font-size: 1.6rem; }

  .detail__title { font-size: 1.5rem; }

  .detail__params { grid-template-columns: 1fr; }

  .tabs { overflow-x: auto; }
}

/* 超窄屏(≤320px / 自动化测试极窄视口)：数据区恢复单列、数字进一步缩小，避免撑破容器 */
@media (max-width: 320px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stat-item { padding: 16px; }
  .stat-item__number { font-size: 1.5rem; }

  /* 白皮书(首页)：极窄时改回纵向+封面全宽，避免左封右文把信息区挤没导致横向溢出 */
  .home-wp-grid .whitepaper-card { flex-direction: column; gap: 10px; }
  .home-wp-grid .whitepaper-card__cover { width: 100%; height: 100px; }

  /* 新闻资讯(首页/列表页)：极窄时改回纵向+缩略图全宽 */
  .home-news .news-item,
  .news-grid .news-item { flex-direction: column; gap: 8px; }
  .home-news .news-item__thumb,
  .news-grid .news-item__thumb { width: 100%; height: 100px; }

  /* 解决方案列表页：极窄时改回纵向+封面全宽 */
  .sol-grid .whitepaper-card { flex-direction: column; gap: 10px; }
  .sol-grid .whitepaper-card__cover { width: 100%; height: 100px; }
}