/**
 * 磐石建材 — 基础建材/结构材料企业官网
 * 设计基调：深蓝稳重 + 钢灰工业 + 橙色警示/强调
 * 直角硬朗 + 暗色主题 + 信息密集型工程技术手册风格
 * 纯原生 CSS，无框架依赖
 */


/* ============================================================
   CSS 变量体系
   ============================================================ */
:root {
  /* 基底色 — 深蓝工程系 */
  --bg-deep: #060E1A;
  --bg-primary: #0B1A2E;
  --bg-secondary: #0F2040;
  --bg-card: #0D1B33;
  --bg-card-hover: #132848;
  --bg-input: rgba(255, 255, 255, 0.04);
  --bg-overlay: rgba(6, 14, 26, 0.85);

  /* 品牌色 */
  --brand-blue: #1A3A6B;
  --brand-steel: #7A8A9E;
  --brand-orange: #E87A20;
  --brand-orange-dim: rgba(232, 122, 32, 0.15);
  --brand-orange-glow: rgba(232, 122, 32, 0.3);

  /* 文字色阶 */
  --text-primary: #E8ECF2;
  --text-secondary: #8899B0;
  --text-muted: #546378;
  --text-white: #FFFFFF;

  /* 边框 */
  --border-subtle: rgba(122, 138, 158, 0.15);
  --border-card: rgba(122, 138, 158, 0.2);
  --border-orange: rgba(232, 122, 32, 0.5);
  --border-orange-light: rgba(232, 122, 32, 0.3);

  /* 阴影 */
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-orange: 0 0 20px rgba(232, 122, 32, 0.15);

  /* 直角 — 工业硬朗 */
  --radius-none: 0;
  --radius-sm: 2px;
  --radius-md: 3px;

  /* 间距 */
  --section-py: 90px;
  --container-max: 1280px;
  --header-h: 68px;

  /* 过渡 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 180ms;
  --duration-normal: 280ms;
  --duration-slow: 450ms;

  /* 字体 — 系统无衬线 */
  --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'Consolas', 'Monaco', 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;
}

/* 深色背景纹理 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(180deg, #060E1A 0%, #0B1A2E 30%, #0D1B33 60%, #0B1A2E 100%);
  pointer-events: none;
}

::selection {
  background: rgba(232, 122, 32, 0.3);
  color: #fff;
}

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--brand-steel); border-radius: 0; }
::-webkit-scrollbar-thumb:hover { background: var(--brand-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; }

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

input::placeholder, textarea::placeholder {
  color: var(--text-muted);
  opacity: 1;
}

/* ============================================================
   排版
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

/* 区块通用标签 */
.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--brand-orange);
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 16px;
}

.section-tag::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 2px;
  background: var(--brand-orange);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.03em;
  position: relative;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

/* 数据突出样式 */
.data-highlight {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--brand-orange);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   布局容器
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.container--narrow {
  max-width: 900px;
}

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

.section--dark {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

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

/* ============================================================
   Header 头部 — 深蓝固定顶栏
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(11, 26, 46, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.header.scrolled {
  background: rgba(6, 14, 26, 0.98);
  box-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
}

.header__inner {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

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

.header__logo-icon {
  width: 42px;
  height: 42px;
  background: var(--brand-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: #fff;
  font-weight: 700;
}

.header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.header__logo-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: 0.02em;
}

.header__logo-sub {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--brand-orange);
}

/* 主导航 */
.header__nav {
  display: flex;
  align-items: center;
  gap: 1px;
}

.header__nav-link {
  padding: 8px 15px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  position: relative;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--brand-orange);
  transition: width var(--duration-fast) var(--ease-out);
}

.header__nav-link:hover,
.header__nav-link.active {
  color: var(--text-white);
}

.header__nav-link:hover::after,
.header__nav-link.active::after {
  width: 60%;
}

/* 导航下拉 */
.header__nav-item {
  position: relative;
}

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

.header__dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 170px;
  padding: 6px 0;
  background: rgba(15, 32, 64, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-card);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 60;
}

.header__dropdown a {
  display: block;
  padding: 9px 18px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.header__dropdown a:hover {
  color: var(--brand-orange);
  background: rgba(232, 122, 32, 0.08);
}

/* 头部右侧操作区 */
.header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: 20px;
}

.header__phone {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.header__phone i {
  color: var(--brand-orange);
  font-size: 0.9rem;
}

.header__phone:hover {
  border-color: var(--brand-orange);
  color: var(--text-primary);
}

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  background: var(--brand-orange);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: all var(--duration-fast) var(--ease-out);
}

.header__cta:hover {
  background: #F08830;
  color: #fff;
  box-shadow: var(--shadow-orange);
  transform: translateY(-1px);
}

/* ============================================================
   汉堡菜单（移动端）
   ============================================================ */
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  z-index: 110;
  margin-left: 0;
  margin-right: 12px;
  order: -1;
  transition: border-color var(--duration-fast);
}

.hamburger:hover {
  border-color: var(--brand-orange);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  transition: all var(--duration-normal) var(--ease-out);
}

.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;
  left: 0;
  bottom: 0;
  width: 80%;
  max-width: 340px;
  background: rgba(11, 26, 46, 0.99);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 120;
  transform: translateX(-100%);
  transition: transform var(--duration-normal) var(--ease-out);
  overflow-y: auto;
  border-right: 1px solid var(--border-card);
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav__inner {
  padding: 20px;
  padding-top: 80px;
}

.mobile-nav__link {
  display: block;
  padding: 12px 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-fast);
}

.mobile-nav__link:hover {
  color: var(--brand-orange);
  background: rgba(232, 122, 32, 0.05);
}

.mobile-nav__sub {
  padding-left: 16px;
  display: none;
}

.mobile-nav__sub.open {
  display: block;
}

.mobile-nav__sub a {
  display: block;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 115;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal);
}

.mobile-nav__overlay.show {
  opacity: 1;
  pointer-events: auto;
}

/* 移动端底部固定拨号栏 */
.mobile-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: rgba(11, 26, 46, 0.98);
  border-top: 1px solid var(--border-card);
  padding: 8px 0;
}

.mobile-bar__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  text-align: center;
}

.mobile-bar__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  color: var(--text-muted);
  padding: 6px 0;
}

.mobile-bar__item i {
  font-size: 1.1rem;
  color: var(--brand-orange);
}

/* ============================================================
   按钮系统
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
  font-family: var(--font-body);
}

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

.btn--primary:hover {
  background: #F08830;
  box-shadow: var(--shadow-orange);
  transform: translateY(-1px);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-orange);
}

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

.btn--ghost {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border-color: var(--brand-steel);
}

.btn--white-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn--white-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

/* ============================================================
   卡片系统 — 深色工业风
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  display: block;
}

.card:hover {
  border-color: var(--border-orange);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.card__image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg-secondary);
}

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

.card:hover .card__image img {
  transform: scale(1.04);
}

.card__body {
  padding: 18px 20px;
}

.card__tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--brand-orange);
  background: var(--brand-orange-dim);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.card__specs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.card__spec {
  padding: 3px 8px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--brand-steel);
  background: rgba(122, 138, 158, 0.1);
  letter-spacing: 0.03em;
}

/* 橙色左边框变体 — 用于产品卡片 */
.card--orange-border {
  border-left: 2px solid var(--brand-orange);
}

/* ============================================================
   首页 — Hero Banner
   ============================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 560px;
  overflow: hidden;
  background: var(--bg-deep);
}

.hero .swiper {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(180deg, rgba(6, 14, 26, 0.25) 0%, rgba(6, 14, 26, 0.1) 40%, rgba(6, 14, 26, 0.9) 100%);
}

/* 工业网格线装饰 */
.hero__grid-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  background-image:
    linear-gradient(rgba(122, 138, 158, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 138, 158, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 4;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: 110px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 工业标签 */
.hero__label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--brand-orange);
  margin-bottom: 1rem;
}

.hero__label::before {
  content: '';
  width: 40px;
  height: 1px;
  background: var(--brand-orange);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
  max-width: 700px;
}

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

.hero__subtitle {
  font-size: clamp(0.95rem, 1.8vw, 1.15rem);
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 2rem;
  font-weight: 400;
  max-width: 560px;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Hero Swiper 分页器 */
.hero-pagination {
  display: flex;
  justify-content: flex-start;
  gap: 6px;
  margin-top: 20px;
}

.hero-pagination .swiper-pagination-bullet {
  width: 48px;
  height: 3px;
  background: rgba(255, 255, 255, 0.25);
  opacity: 1;
  transition: all var(--duration-normal);
}

.hero-pagination .swiper-pagination-bullet-active {
  width: 80px;
  background: var(--brand-orange);
  box-shadow: 0 0 8px var(--brand-orange-glow);
}

/* 滚动指示器 */
.hero__scroll {
  position: absolute;
  bottom: 40px;
  right: 32px;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.35);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 28px;
  background: linear-gradient(180deg, var(--brand-orange), transparent);
}

/* ============================================================
   首页 — 数据看板
   ============================================================ */
.data-panel {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-card);
  border-bottom: 1px solid var(--border-card);
  padding: 50px 0;
  position: relative;
  overflow: hidden;
}

.data-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--brand-orange), transparent);
  opacity: 0.3;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  z-index: 1;
}

.data-item {
  text-align: center;
  padding: 24px 16px;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.01);
  transition: border-color var(--duration-normal);
}

.data-item:hover {
  border-color: var(--border-orange);
}

.data-item__icon {
  font-size: 2rem;
  color: var(--brand-orange);
  margin-bottom: 12px;
  opacity: 0.8;
}

.data-item__number {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}

.data-item__unit {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--brand-orange);
}

.data-item__label {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ============================================================
   首页 — 产品分类卡片（5列）
   ============================================================ */
.product-cats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.product-cat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 32px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

.product-cat-card:hover {
  border-color: var(--brand-orange);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.product-cat-card__icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--brand-orange);
  margin-bottom: 14px;
  background: var(--brand-orange-dim);
}

.product-cat-card__name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.product-cat-card__spec {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

/* ============================================================
   首页 — 工程案例大图
   ============================================================ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.case-card {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  transition: border-color var(--duration-normal);
}

.case-card:hover {
  border-color: var(--brand-orange);
}

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

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

.case-card__info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px 18px;
  background: linear-gradient(transparent, rgba(6, 14, 26, 0.95));
}

.case-card__title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.case-card__type {
  font-size: 0.75rem;
  color: var(--brand-orange);
  letter-spacing: 0.05em;
}

/* ============================================================
   首页 — 质量检测模块
   ============================================================ */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.quality-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  transition: all var(--duration-normal) var(--ease-out);
}

.quality-card:hover {
  border-color: var(--brand-orange);
  transform: translateY(-3px);
}

.quality-card__step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 2px solid var(--brand-orange);
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--brand-orange);
  margin-bottom: 16px;
}

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

.quality-card__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   首页 — 新闻列表
   ============================================================ */
.news-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.news-card {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-normal);
}

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

.news-card__thumb {
  width: 100px;
  height: 80px;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--bg-secondary);
}

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

.news-card__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.news-card__title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card__date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ============================================================
   首页 — CTA 区域
   ============================================================ */
.cta-section {
  text-align: center;
  padding: 80px 0 100px;
  background: var(--bg-primary);
  border-top: 2px solid var(--brand-orange);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 50%, rgba(232, 122, 32, 0.04) 0%, transparent 60%),
    radial-gradient(circle at 70% 50%, rgba(26, 58, 107, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.cta-section__title {
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.75rem;
  position: relative;
}

.cta-section__subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  position: relative;
}

/* ============================================================
   首页 — 仓储展示
   ============================================================ */
.storage-section {
  background: var(--bg-deep);
  position: relative;
}

.storage-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.storage-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
}

.storage-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.storage-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.storage-item {
  padding: 18px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.storage-item__value {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--brand-orange);
  margin-bottom: 4px;
}

.storage-item__label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ============================================================
   内页 Banner
   ============================================================ */
.inner-banner {
  position: relative;
  height: 320px;
  overflow: hidden;
  background: var(--bg-primary);
}

.inner-banner__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.5;
}

.inner-banner__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 14, 26, 0.6) 0%, rgba(11, 26, 46, 0.85) 100%);
}

.inner-banner__content {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.inner-banner__title {
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.5rem;
}

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

/* 面包屑 */
.breadcrumb-bar {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 13px 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

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

.breadcrumb i {
  font-size: 0.6rem;
  color: var(--text-muted);
}

/* ============================================================
   列表页 — 侧边栏 + 网格
   ============================================================ */
.page-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* 侧边栏 */
.sidebar {
  flex-shrink: 0;
}

.sidebar__title {
  padding: 16px 18px;
  background: var(--brand-orange);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.03em;
}

.sidebar__nav a {
  display: block;
  padding: 13px 18px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.01);
  transition: all var(--duration-fast);
  border-left: 3px solid transparent;
}

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

.sidebar__nav a i {
  margin-right: 6px;
  font-size: 0.65rem;
}

/* 子栏目过滤栏 */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin-bottom: 28px;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.filter-bar::-webkit-scrollbar { display: none; }

.filter-bar a {
  display: inline-flex;
  padding: 7px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  white-space: nowrap;
  transition: all var(--duration-fast);
  flex-shrink: 0;
}

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

/* ============================================================
   列表页 — 网格
   ============================================================ */
.list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.list-header {
  text-align: center;
  margin-bottom: 40px;
}

.list-header h1 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: 0.5rem;
}

/* ============================================================
   产品详情页
   ============================================================ */
.product-detail {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

.product-detail__main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-subtle);
}

.product-detail__gallery {
  background: var(--bg-secondary);
  aspect-ratio: 4/3;
  overflow: hidden;
  border: 1px solid var(--border-card);
}

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

.product-detail__info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.product-detail__title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
}

.product-detail__specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.product-detail__spec {
  padding: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.product-detail__spec-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.product-detail__spec-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.product-detail__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Tab切换 */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-card);
  gap: 0;
  margin-bottom: 32px;
}

.tab-btn {
  padding: 12px 24px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration-fast);
  font-family: var(--font-body);
}

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

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

.tab-panel {
  display: none;
}

.tab-panel:not(.hidden) {
  display: block;
}

.tab-panel.hidden {
  display: none;
}

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

.detail__header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.detail__title {
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  margin-bottom: 10px;
}

.detail__meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

.detail__params {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-bottom: 28px;
}

.detail__param {
  padding: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  text-align: center;
}

.detail__param-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 3px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.detail__param-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.detail__body {
  color: var(--text-secondary);
  line-height: 1.9;
  font-size: 0.93rem;
}

.detail__body img {
  margin: 20px 0;
  max-width: 100%;
}

.detail__body p { margin-bottom: 14px; }
.detail__body h2, .detail__body h3 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin-top: 28px;
  margin-bottom: 14px;
}

/* 上下篇 */
.detail__pager {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 10px;
}

.detail__pager a {
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

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

/* 相关推荐 */
.related-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 48px 0 20px;
  color: var(--text-primary);
  padding-left: 14px;
  border-left: 3px solid var(--brand-orange);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* ============================================================
   搜索页
   ============================================================ */
.search-box {
  max-width: 680px;
  margin: 0 auto;
}

.search-form-row {
  display: flex;
  gap: 8px;
}

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

.search-input-wrap i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.search-input-wrap input {
  width: 100%;
  padding: 13px 16px 13px 38px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.9rem;
}

.search-input-wrap input:focus {
  outline: none;
  border-color: var(--brand-orange);
  box-shadow: 0 0 0 3px var(--brand-orange-dim);
}

.search-result-item {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-fast);
  margin-bottom: 8px;
}

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

.search-result-item__thumb {
  width: 100px;
  height: 80px;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--bg-secondary);
}

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

.search-result-item__info {
  flex: 1;
  min-width: 0;
}

.search-result-item__title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result-item__desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 3px;
  margin-top: 44px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-fast);
}

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

.pagination .active {
  background: var(--brand-orange);
  color: #fff;
  border-color: var(--brand-orange);
  font-weight: 600;
}

.pagination .disabled {
  color: var(--text-muted);
  pointer-events: none;
  opacity: 0.4;
}

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

.empty-state i {
  font-size: 2.5rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: block;
  opacity: 0.4;
}

.empty-state p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================================
   联系我们页
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  margin-bottom: 8px;
  transition: border-color var(--duration-fast);
}

.contact-info__item:hover {
  border-color: var(--border-card);
}

.contact-info__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--brand-orange-dim);
  color: var(--brand-orange);
  font-size: 1rem;
  flex-shrink: 0;
}

.contact-info__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.contact-info__value {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* 表单 */
.contact-form-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.form-group label .required {
  color: var(--brand-orange);
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.88rem;
  transition: all var(--duration-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--brand-orange);
  box-shadow: 0 0 0 3px var(--brand-orange-dim);
}

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' fill='%237A8A9E' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

/* ============================================================
   经销商页
   ============================================================ */
.dealer-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.dealer-feature {
  text-align: center;
  padding: 28px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.dealer-feature__icon {
  font-size: 2rem;
  color: var(--brand-orange);
  margin-bottom: 12px;
}

.dealer-feature__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.dealer-feature__desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============================================================
   Footer 底部
   ============================================================ */
.footer {
  background: var(--bg-deep);
  border-top: 2px solid var(--brand-orange);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 36px;
  padding: 56px 0 36px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.footer__brand-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 14px 0;
}

.footer__social {
  display: flex;
  gap: 8px;
}

.footer__social a {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  font-size: 0.9rem;
  border: 1px solid var(--border-subtle);
  transition: all var(--duration-fast);
}

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

.footer__col-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.footer__col-title::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--brand-orange);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer__links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}

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

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.footer__contact-item i {
  color: var(--brand-orange);
  margin-top: 3px;
  flex-shrink: 0;
}

.footer__qrcode {
  width: 100px;
  height: 100px;
  background: #fff;
  padding: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: #999;
  border: 1px solid var(--border-subtle);
}

.footer__bottom {
  border-top: 1px solid var(--border-subtle);
  padding: 18px 0;
}

.footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 8px;
}

.footer__bottom a {
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

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

/* 友情链接 */
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  padding: 14px 0;
  border-top: 1px solid var(--border-subtle);
}

.friend-links__label {
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.friend-links a {
  font-size: 0.78rem;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

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

/* ============================================================
   返回顶部 + 在线客服
   ============================================================ */
.back-top {
  position: fixed;
  right: 16px;
  bottom: 120px;
  width: 42px;
  height: 42px;
  background: rgba(11, 26, 46, 0.9);
  border: 1px solid var(--border-card);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  cursor: pointer;
  z-index: 80;
  opacity: 0;
  pointer-events: none;
  transition: all var(--duration-normal);
}

.back-top.show {
  opacity: 1;
  pointer-events: auto;
}

.back-top:hover {
  background: var(--brand-orange);
  color: #fff;
  border-color: var(--brand-orange);
}

/* 在线客服 — 右下角橙色按钮 */
.online-service {
  position: fixed;
  right: 16px;
  bottom: 60px;
  z-index: 85;
  width: 50px;
  height: 50px;
  background: var(--brand-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(232, 122, 32, 0.3);
  animation: servicePulse 2s ease-in-out infinite;
  transition: all var(--duration-fast);
}

.online-service:hover {
  background: #F08830;
  transform: scale(1.05);
}

@keyframes servicePulse {
  0%, 100% { box-shadow: 0 4px 16px rgba(232, 122, 32, 0.3); }
  50% { box-shadow: 0 4px 28px rgba(232, 122, 32, 0.6); }
}

/* ============================================================
   动画
   ============================================================ */

/* 数字滚动 */
@keyframes countUpIn {
  0% { opacity: 0; transform: translateY(10px); }
  100% { opacity: 1; transform: translateY(0); }
}

.countup {
  animation: countUpIn 0.6s var(--ease-out) both;
}

/* 边框扫描线 */
@keyframes borderScan {
  0% { width: 0; left: 50%; }
  100% { width: 100%; left: 0; }
}

/* Hero 标题入场 */
@keyframes fadeInUp {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}

.hero__title { animation: fadeInUp 0.8s var(--ease-out) both; }
.hero__subtitle { animation: fadeInUp 0.8s var(--ease-out) 0.15s both; }
.hero__actions { animation: fadeInUp 0.7s var(--ease-out) 0.3s both; }

/* CTA 按钮脉冲 */
@keyframes ctaPulse {
  0% { box-shadow: 0 0 0 0 rgba(232, 122, 32, 0.4); }
  70% { box-shadow: 0 0 0 14px rgba(232, 122, 32, 0); }
  100% { box-shadow: 0 0 0 0 rgba(232, 122, 32, 0); }
}

.btn--primary.pulse {
  animation: ctaPulse 2s infinite;
}

/* ============================================================
   AOS 覆盖
   ============================================================ */
[data-aos] {
  transition-timing-function: var(--ease-out);
}

/* ============================================================
   响应式 — 平板 (768px - 1023px)
   ============================================================ */
@media (max-width: 1023px) {
  :root { --section-py: 64px; }

  .header__nav,
  .header__actions {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-bar {
    display: block;
  }

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

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

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

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

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

  .product-detail__main {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

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

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

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

  .storage-content {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

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

/* ============================================================
   响应式 — 移动端 (< 768px)
   ============================================================ */
@media (max-width: 767px) {
  :root { --section-py: 48px; }

  .hero {
    height: 85vh;
    min-height: 440px;
  }

  .hero__content {
    padding-bottom: 80px;
  }

  .hero__scroll {
    display: none;
  }

  .inner-banner {
    height: 200px;
  }

  .data-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .product-cats {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

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

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

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

  .dealer-features {
    grid-template-columns: 1fr;
  }

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

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

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

  .tabs {
    overflow-x: auto;
  }
  .tab-btn {
    padding: 10px 16px;
    white-space: nowrap;
    font-size: 0.82rem;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer__bottom-inner {
    flex-direction: column;
    text-align: center;
  }

  .contact-form-card {
    padding: 20px 16px;
  }

  .detail__pager {
    flex-direction: column;
    text-align: center;
  }

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

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

  .search-result-item__thumb {
    width: 100%;
    height: 140px;
  }

  .back-top {
    right: 10px;
    bottom: 80px;
  }

  .online-service {
    right: 10px;
    bottom: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
  }
}

/* ============================================================
   偏好：减少动画
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Mobile engineering catalogue: keep desktop and original content. */
@media(max-width:1023px){
 html,body{overflow-x:visible}body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}body.page-inner{padding-top:calc(var(--header-h) + 16px)}
 .container,.page-layout,.breadcrumb{padding-left:20px;padding-right:20px}.page-layout>*,.list-grid>*,.storage-content>*,.contact-grid>*,.footer__grid>*{min-width:0}
 .inner-banner{height:auto!important;min-height:164px}.inner-banner__content{height:auto;min-height:164px;padding:28px 20px;overflow-wrap:anywhere}.inner-banner__title{font-size:26px;line-height:1.45}.inner-banner__subtitle{font-size:13px}
 .breadcrumb{flex-wrap:wrap;white-space:normal;overflow-wrap:anywhere;font-size:12px}
 .header__inner{gap:12px;padding:0 20px}.header__logo{min-width:0}.header__logo-icon,.hamburger{flex-shrink:0}.header:has(.hamburger.active){z-index:130}
 .mobile-nav{top:var(--header-h);bottom:0;width:calc(100vw - 48px);max-width:340px;visibility:hidden;pointer-events:none}.mobile-nav.open{visibility:visible;pointer-events:auto}.mobile-nav__inner{padding:18px 16px 28px}.mobile-nav__link{min-height:44px;padding:11px 12px;font-size:14px}
 .mobile-nav__sub{padding:0}.mobile-nav__sub.open{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px;padding:6px 0 12px}.mobile-nav__sub a{padding:10px;font-size:12px;background:var(--bg-card)}.mobile-nav__sub a:first-child{grid-column:1/-1}
 .mobile-bar{padding:4px 0 calc(4px + env(safe-area-inset-bottom))}.mobile-bar__item{min-height:48px;padding:4px 0}.online-service{bottom:138px}.back-top{bottom:82px}
 .card__specs,.card__meta,.detail__meta-row{flex-wrap:wrap}.card__spec,.product-detail__spec-value,.detail__body,.detail__pager,.contact-info__value,.footer__contact-item{overflow-wrap:anywhere}
 .detail__body img,.detail__body iframe{max-width:100%;height:auto}.detail__body table{display:block;max-width:100%;overflow-x:auto}
 [data-aos^="fade"]{transform:translateY(12px)}[data-aos^="fade"].aos-animate{transform:none}
 .tabs{flex-wrap:wrap;overflow:visible}.tab-btn{flex:1;min-width:70px;white-space:normal;padding:12px 8px}
 input,select,textarea{min-width:0;max-width:100%}.form-group:has([name=checkcode]){flex-wrap:wrap}
 .page-layout:has(.filter-bar)>.sidebar{display:none}.filter-bar{flex-wrap:wrap;gap:8px}
}
@media(max-width:767px){
 :root{--section-py:32px}.section-title{font-size:24px;line-height:1.45}.section-subtitle{font-size:13px}.section-tag{font-size:10px;margin-bottom:10px}
 .btn{font-size:13px;min-height:44px;padding:11px 15px;white-space:normal}
 .hero{height:440px;min-height:0}.hero__content{padding:90px 20px 54px;justify-content:flex-end}.hero__label{font-size:11px;letter-spacing:.1em}.hero__title{font-size:29px;line-height:1.4;margin-bottom:14px}.hero__subtitle{font-size:13px;line-height:1.8;margin-bottom:24px}.hero__actions{gap:12px}.hero-pagination{bottom:20px}
 .data-panel{padding:26px 0}.data-grid{gap:10px}.data-item{padding:16px 10px}.data-item__icon{font-size:22px;margin-bottom:8px}.data-item__number{font-size:27px}.data-item__unit{font-size:13px}.data-item__label{font-size:11px}
 .product-cats{grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.product-cat-card{padding:16px 8px}.product-cat-card__icon{width:38px;height:38px;font-size:22px;margin-bottom:9px}.product-cat-card__name{font-size:14px}.product-cat-card__spec{font-size:10px}
 .list-grid{gap:12px;grid-template-columns:1fr}.list-grid>.card{display:grid;grid-template-columns:104px minmax(0,1fr)}.list-grid>.card .card__image{aspect-ratio:auto;height:100%;min-height:150px}.card__body{padding:14px 12px}.card__title{font-size:15px;line-height:1.6;display:block;-webkit-line-clamp:unset}.card__desc{font-size:12px;line-height:1.7}.card__tag{font-size:10px;padding:3px 6px}.card__specs{gap:5px}.card__spec{font-size:10px;padding:3px 5px}
 .case-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.case-card{aspect-ratio:auto;display:flex;flex-direction:column}.case-card img{height:auto;aspect-ratio:4/3}.case-card__info{position:static;padding:12px 10px;background:var(--bg-card);flex:1}.case-card__title{font-size:14px;line-height:1.6}.case-card__type{font-size:10px}
 .quality-grid{grid-template-columns:1fr;gap:12px}.quality-card{display:grid;grid-template-columns:38px minmax(0,1fr);gap:5px 14px;text-align:left;padding:18px}.quality-card__step{grid-row:1/3;width:36px;height:36px;font-size:17px;margin:0}.quality-card__title{font-size:16px;margin:0}.quality-card__desc{font-size:12px}
 .storage-content{gap:20px}.storage-image{height:190px;aspect-ratio:auto}.storage-image img{height:100%;object-fit:cover}.storage-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.storage-item{padding:14px 10px}.storage-item__value{font-size:18px;overflow-wrap:anywhere}.storage-item__label{font-size:11px}
 .news-list{gap:12px}.news-card{padding:12px;gap:12px}.news-card__thumb{width:72px;height:82px}.news-card__title{font-size:14px;line-height:1.6;display:block;-webkit-line-clamp:unset}.news-card__date{font-size:10px}
 .cta-section{padding:32px 0}.cta-section__title{font-size:24px;line-height:1.5}.cta-section__subtitle{font-size:13px;margin-bottom:24px}.cta-section .btn{font-size:14px!important;padding:12px 18px!important}
 .footer__grid{padding:30px 20px 24px;grid-template-columns:minmax(0,1fr) 96px;gap:24px 16px}.footer__grid>div:nth-child(-n+2){grid-column:1/-1}.footer__links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.footer__brand-desc,.footer__links a,.footer__contact-item{font-size:12px}.footer__col-title{font-size:14px;margin-bottom:12px}.footer__qrcode{width:90px;height:90px;font-size:11px}.footer__bottom-inner{font-size:10px;padding:18px 20px;gap:8px}.friend-links{font-size:11px;gap:10px}
 .inner-banner__title{font-size:24px}.breadcrumb{font-size:11px;padding-top:12px;padding-bottom:12px}.filter-bar a{font-size:12px;padding:8px 11px}
 .product-detail__main{gap:24px}.product-detail__gallery img{max-height:300px;object-fit:contain}.product-detail__title,.detail__title{font-size:23px;line-height:1.5}.product-detail__specs,.detail__params{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.product-detail__spec{padding:12px 10px}.product-detail__spec-value{font-size:13px}.product-detail__actions{flex-wrap:wrap;gap:10px}.detail__body{font-size:14px}.detail__param{padding:14px 10px}.detail__param-value{font-size:15px;overflow-wrap:anywhere}.detail__pager{font-size:12px;text-align:left;align-items:flex-start}.related-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
 .dealer-features{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.dealer-feature{padding:18px 12px}
 .contact-grid{gap:24px}.contact-info__item{padding:16px}.contact-info__value{font-size:13px}.contact-form-card{padding:24px 16px}.contact-form-card form>div[style*="grid"]{grid-template-columns:1fr!important;gap:0!important}.form-control{font-size:16px}
 .search-result-item{flex-direction:row;gap:12px}.search-result-item__thumb{width:75px;height:90px;flex-shrink:0}.search-result-item>div{min-width:0}.search-result-item__title{font-size:15px;overflow-wrap:anywhere}.search-result-item__desc{font-size:12px}.search-form-row{flex-wrap:wrap}.search-form-row input{min-width:0}
 .online-service{bottom:138px}.back-top{bottom:82px}
}