/* Self-hosted Montserrat variable font (300-800) */
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 300 800;
  font-display: swap;
  src: url('/fonts/montserrat/montserrat-cyrillic-ext.woff2') format('woff2');
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 300 800;
  font-display: swap;
  src: url('/fonts/montserrat/montserrat-cyrillic.woff2') format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 300 800;
  font-display: swap;
  src: url('/fonts/montserrat/montserrat-vietnamese.woff2') format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 300 800;
  font-display: swap;
  src: url('/fonts/montserrat/montserrat-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Montserrat';
  font-style: normal;
  font-weight: 300 800;
  font-display: swap;
  src: url('/fonts/montserrat/montserrat-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ===== variables.css ===== */
/* ============================================================
   RLB Steel — Global Design System Tokens
   ─────────────────────────────────────────────────────────
   全站唯一色值/字体/间距/圆角/阴影/动画变量源头。
   所有CSS模块必须引用变量，禁止硬编码字面量。
   后续开发页面严禁私自修改此文件中的色值、尺寸、字体规范。
   ============================================================ */

:root {

  /* ═══════════════════════════════════════════════════
     1. COLOR — 重工业深色风格，无高饱和刺眼配色
     ═══════════════════════════════════════════════════ */

  /* 主色 */
  --color-dark:            #222831;   /* 深空灰 — 标题/正文/深色区块底色 */
  --color-dark-light:      #393E46;   /* 浅碳灰 — 次要文字/muted标题 */
  --color-primary:         #0F52BA;   /* 金属蓝 — CTA/链接/强调色 */
  --color-primary-dark:    #0A3D8F;   /* 深金属蓝 — hover/active状态 */
  --color-primary-light:   #E8F0FE;   /* 冰蓝淡底 — 浅色区块/标签背景 */
  --color-gray:            #D6D6D6;   /* 中性银灰 — 边框/分割线 */
  --color-gray-light:      #F5F5F5;   /* 浅银灰 — 交替区块背景 */
  --color-white:           #FFFFFF;

  /* 语义色（仅用于表单校验等场景，非品牌色） */
  --color-success:         #2E7D32;
  --color-error:           #C62828;
  --color-warning:         #F9A825;

  /* 透明度变体 */
  --color-dark-90:         rgba(34,40,49,0.90);
  --color-dark-80:         rgba(34,40,49,0.80);
  --color-dark-60:         rgba(34,40,49,0.60);
  --color-white-10:        rgba(255,255,255,0.10);
  --color-white-20:        rgba(255,255,255,0.20);
  --color-white-50:        rgba(255,255,255,0.50);
  --color-white-80:        rgba(255,255,255,0.80);
  --color-overlay:         rgba(0,0,0,0.55);

  /* ═══════════════════════════════════════════════════
     2. TYPOGRAPHY — Montserrat 全站统一
     ═══════════════════════════════════════════════════ */

  --font-primary:          'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-cjk:              'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* 字号阶梯 */
  --font-size-xs:          0.75rem;    /* 12px */
  --font-size-sm:          0.875rem;   /* 14px */
  --font-size-md:          1rem;       /* 16px */
  --font-size-lg:          1.125rem;   /* 18px */
  --font-size-xl:          1.5rem;     /* 24px */
  --font-size-2xl:         2rem;       /* 32px */
  --font-size-3xl:         2.5rem;     /* 40px */
  --font-size-4xl:         3rem;       /* 48px */
  --font-size-5xl:         3.5rem;     /* 56px */

  /* 字重 — Montserrat支持300~800 */
  --font-weight-light:     300;
  --font-weight-regular:   400;
  --font-weight-medium:    500;
  --font-weight-semibold:  600;
  --font-weight-bold:      700;
  --font-weight-extrabold: 800;

  /* 行高 */
  --line-height-tight:     1.25;
  --line-height-normal:    1.6;
  --line-height-loose:     1.8;

  /* 字间距 */
  --letter-spacing-tight:  -0.5px;
  --letter-spacing-normal: 0;
  --letter-spacing-wide:   1px;
  --letter-spacing-wider:  2px;

  /* ═══════════════════════════════════════════════════
     3. SPACING — 8px 基础网格
     ═══════════════════════════════════════════════════ */

  --space-1:               0.25rem;    /* 4px  */
  --space-2:               0.5rem;     /* 8px  */
  --space-3:               0.75rem;    /* 12px */
  --space-4:               1rem;       /* 16px */
  --space-5:               1.25rem;    /* 20px */
  --space-6:               1.5rem;     /* 24px */
  --space-8:               2rem;       /* 32px */
  --space-10:              2.5rem;     /* 40px */
  --space-12:              3rem;       /* 48px */
  --space-16:              4rem;       /* 64px */
  --space-20:              5rem;       /* 80px */
  --space-24:              6rem;       /* 96px */

  /* ═══════════════════════════════════════════════════
     4. BORDER RADIUS — 卡片统一8px
     ═══════════════════════════════════════════════════ */

  --radius-sm:             4px;
  --radius-md:             8px;        /* 标准卡片/按钮圆角 */
  --radius-lg:             12px;
  --radius-xl:             16px;
  --radius-full:           9999px;     /* 胶囊形 */

  /* ═══════════════════════════════════════════════════
     5. SHADOW — 轻微柔和投影
     ═══════════════════════════════════════════════════ */

  --shadow-sm:             0 1px 3px rgba(0,0,0,0.06);
  --shadow-md:             0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg:             0 8px 24px rgba(0,0,0,0.10);
  --shadow-xl:             0 12px 40px rgba(0,0,0,0.14);
  --shadow-inner:          inset 0 1px 3px rgba(0,0,0,0.06);

  /* ═══════════════════════════════════════════════════
     6. TRANSITION — 平缓过渡
     ═══════════════════════════════════════════════════ */

  --transition-fast:       150ms ease;
  --transition-base:       250ms ease;
  --transition-slow:       400ms ease;
  --transition-bounce:     400ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-smooth:     300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* ═══════════════════════════════════════════════════
     7. LAYOUT
     ═══════════════════════════════════════════════════ */

  --container-max:         1200px;
  --container-wide:        1400px;
  --top-contact-height:    32px;
  --header-height:         72px;
  --header-height-scroll:  60px;
  --sidebar-width:         280px;

  /* ═══════════════════════════════════════════════════
     8. Z-INDEX SCALE
     ═══════════════════════════════════════════════════ */

  --z-dropdown:            100;
  --z-sticky:              200;
  --z-overlay:             300;
  --z-modal:               400;
  --z-toast:               500;

  /* ═══════════════════════════════════════════════════
     9. DIVIDER — 纤细分割线
     ═══════════════════════════════════════════════════ */

  --divider-color:         var(--color-gray);
  --divider-width:         1px;

  /* ═══════════════════════════════════════════════════
     10. TEXTURE — SVG钢材轧制纹理（低调背景装饰）
     ═══════════════════════════════════════════════════ */

  --texture-rolling:       url("../images/textures/steel-rolling.svg");
  --texture-cutting:       url("../images/textures/steel-cutting.svg");
  --texture-opacity:       0.03;       /* 极低透明度，不抢占主体视觉 */
}

/* ===== base.css ===== */
/* ============================================================
   RLB Steel — Base Reset & Global Defaults
   重置浏览器差异 + 排版 + 容器 + 工具类 + 懒加载 + 平滑滚动
   ============================================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;          /* 全局平滑滚动 */
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-dark);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top: calc(var(--top-contact-height) + var(--header-height));
  overflow-x: hidden;
}

/* ── CJK字体回退 ─────────────────────────────────────── */
[lang^="zh"],
[lang="ar"] {
  font-family: var(--font-cjk), var(--font-primary);
}

/* ── Typography ──────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-dark);
}

h1 { font-size: var(--font-size-4xl); letter-spacing: var(--letter-spacing-tight); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl);  }
h5 { font-size: var(--font-size-lg);  }
h6 { font-size: var(--font-size-md);  }

p {
  margin-bottom: var(--space-4);
  color: var(--color-dark-light);
}

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

a:hover { color: var(--color-primary-dark); }

ul, ol { list-style: none; }

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
}

table { border-collapse: collapse; border-spacing: 0; }

/* ── Container ───────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container--wide { max-width: var(--container-wide); }

/* ── Section Spacing ─────────────────────────────────── */
.section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
}

.section--sm {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

/* ── Divider — 纤细分割线 ────────────────────────────── */
.divider {
  border: none;
  border-top: var(--divider-width) solid var(--divider-color);
  margin: 0;
}

.divider--dark { border-top-color: var(--color-dark-light); }
.divider--light { border-top-color: var(--color-white-20); }

/* ── Texture Background — SVG钢材纹理低调装饰 ────────── */
.texture-rolling {
  background-image: var(--texture-rolling);
  background-repeat: repeat;
  background-size: 200px 200px;
  opacity: var(--texture-opacity);
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.texture-cutting {
  background-image: var(--texture-cutting);
  background-repeat: repeat;
  background-size: 200px 200px;
  opacity: var(--texture-opacity);
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* ── Lazy Load — 图片懒加载通用样式 ──────────────────── */
img[data-src] {
  opacity: 0;
  transition: opacity var(--transition-base);
}

img[data-src].loaded,
img[data-src].lazy-loaded {
  opacity: 1;
}

/* 占位骨架屏 */
.lazy-placeholder {
  background: var(--color-gray-light);
  border-radius: var(--radius-md);
  min-height: 100px;
}

/* ── Scroll Reveal — 滚动淡入上浮动画 ───────────────── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

.reveal--left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal--right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

.reveal--right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ── Image Modal — 图片弹窗放大基础样式 ──────────────── */
.image-modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base),
              visibility var(--transition-base);
}

.image-modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.image-modal__close {
  position: absolute;
  top: 88px;
  right: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: #FFFFFF !important;
  background: #0B5CCB;
  border: 2px solid #FFFFFF;
  border-radius: 50%;
  font-size: 32px;
  font-weight: 400;
  line-height: 8;
  opacity: 1;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  cursor: pointer;
  z-index: 1201;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.image-modal__close:hover {
  background: #084AA5;
  transform: scale(1.08);
}

@media (max-width: 576px) {
  .image-modal__close {
    top: 80px;
    right: 12px;
    width: 40px;
    height: 40px;
    font-size: 28px;
  }
}

.image-modal__content {
  max-width: 90vw;
  max-height: 90vh;
}

.image-modal__img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

/* ── Utility Classes ─────────────────────────────────── */
.text-center { text-align: center; }
.text-left   { text-align: left;   }
.text-right  { text-align: right;  }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Page Entrance ───────────────────────────────────── */
body {
  animation: pageIn var(--transition-slow) forwards;
}

@keyframes pageIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ===== nav.css ===== */
/* ============================================================
   RLB Steel — Navigation Styles
   固定顶栏 + Products下拉菜单 + 语言切换 + 汉堡菜单 + 移动端侧滑
   ============================================================ */

/* ── Slim Contact Bar — 全站顶部联系方式 ─────────────── */
.top-contact-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--top-contact-height);
  z-index: 1000;
  color: var(--color-white-80);
  background: var(--color-dark);
  border-bottom: 2px solid var(--color-primary);
}

.top-contact-bar .container {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
  gap: var(--space-4);
}

.top-contact-bar__welcome {
  flex-shrink: 0;
  font-size: var(--font-size-xs);
  color: var(--color-white-50);
  white-space: nowrap;
}

.top-contact-bar__contacts,
.top-contact-bar__socials,
.top-contact-bar__contact,
.top-contact-bar__social {
  display: flex;
  align-items: center;
}

.top-contact-bar__center {
  display: contents;
}

.top-contact-bar__contacts {
  position: absolute;
  top: 50%;
  left: 50%;
  gap: var(--space-6);
  transform: translate(-50%, -50%);
}

.top-contact-bar__contact {
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-white-80);
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.top-contact-bar__email {
  color: var(--color-white);
  font-weight: var(--font-weight-medium);
}

.top-contact-bar__contact:hover,
.top-contact-bar__social:hover {
  color: var(--color-white);
}

.top-contact-bar__contact svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  fill: var(--color-primary);
}

.top-contact-bar__socials {
  margin-left: auto;
}

.top-contact-bar__social {
  justify-content: center;
  width: 28px;
  height: 22px;
  color: var(--color-white-80);
  border-left: 1px solid var(--color-white-10);
  transition: color var(--transition-fast);
}

.top-contact-bar__social:first-child {
  border-left: 0;
}

.top-contact-bar__social svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* ── Header Bar — 永久固定悬浮，滚动不缩小不消失 ──── */
.site-header {
  position: fixed;
  top: var(--top-contact-height);
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 999;
  background: var(--color-dark-90);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
  transition: background var(--transition-base),
              box-shadow var(--transition-base);
}

.site-header.scrolled {
  background: var(--color-dark);
  box-shadow: 0 4px 24px rgba(0,0,0,0.4);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* ── Logo ────────────────────────────────────────────── */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  text-decoration: none;
}

.site-logo img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.site-logo span {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  letter-spacing: var(--letter-spacing-tight);
}

/* ── Desktop Navigation ──────────────────────────────── */
.main-nav {
  display: none;
}

.main-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.main-nav__item {
  position: relative;
}

.main-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-white-80);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast),
              background var(--transition-fast);
  white-space: nowrap;
}

.main-nav__link:hover,
.main-nav__link.active {
  color: var(--color-white);
  background: var(--color-white-10);
}

/* 下拉箭头 */
.main-nav__arrow {
  font-size: 10px;
  transition: transform var(--transition-fast);
}

.main-nav__item:hover .main-nav__arrow,
.main-nav__item.open .main-nav__arrow {
  transform: rotate(180deg);
}

/* ── Products Mega Dropdown ──────────────────────────── */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 520px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast),
              visibility var(--transition-fast),
              transform var(--transition-fast);
  z-index: var(--z-dropdown);
}

.nav-dropdown::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 0;
  right: 0;
  height: 8px;
}

.main-nav__item:hover .nav-dropdown,
.main-nav__item.open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

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

.nav-dropdown__group-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  margin-bottom: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-gray);
}

.nav-dropdown__link {
  display: block;
  padding: var(--space-1) 0;
  font-size: var(--font-size-sm);
  color: var(--color-dark-light);
  transition: color var(--transition-fast),
              padding-left var(--transition-fast);
}

.nav-dropdown__link:hover {
  color: var(--color-primary);
  padding-left: var(--space-2);
}

/* ── Language Switcher (Desktop) ─────────────────────── */
.lang-switcher {
  display: none;
  position: relative;
}

.lang-switcher__btn {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-white-80);
  border: 1px solid var(--color-white-20);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.lang-switcher__btn:hover {
  color: var(--color-white);
  border-color: var(--color-white-50);
}

.lang-switcher__arrow {
  font-size: var(--font-size-xs);
  transition: transform var(--transition-fast);
}

.lang-switcher.open .lang-switcher__arrow {
  transform: rotate(180deg);
}

.lang-switcher__dropdown {
  position: absolute;
  top: calc(100% + var(--space-1));
  right: 0;
  min-width: 160px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
}

.lang-switcher.open .lang-switcher__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switcher__option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-dark);
  transition: background var(--transition-fast);
  border: none;
  background: none;
  cursor: pointer;
  text-align: left;
}

.lang-switcher__option:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.lang-switcher__option.active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* ── Request A Quote (Desktop) ───────────────────────── */
.btn-inquiry--header {
  display: none;
  padding: var(--space-2) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast),
              transform var(--transition-fast);
  white-space: nowrap;
}

.btn-inquiry--header:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

/* ── Hamburger (Mobile) ──────────────────────────────── */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
  cursor: pointer;
  z-index: calc(var(--z-overlay) + 1);
}

.hamburger__line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger.open .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open .hamburger__line:nth-child(2) {
  opacity: 0;
}
.hamburger.open .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Slide-out Menu ───────────────────────────── */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 360px;
  height: 100vh;
  background: var(--color-dark);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-overlay);
  transition: right var(--transition-base);
  overflow-y: auto;
  padding: var(--space-20) var(--space-6) var(--space-6);
}

.mobile-menu.open { right: 0; }

.mobile-menu__link {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-white-80);
  border-bottom: 1px solid var(--color-white-10);
  transition: color var(--transition-fast);
}

.mobile-menu__link:hover,
.mobile-menu__link.active {
  color: var(--color-white);
}

/* Mobile submenu for Products */
.mobile-submenu {
  padding-left: var(--space-4);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

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

.mobile-submenu__link {
  display: block;
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
  color: var(--color-white-50);
  transition: color var(--transition-fast);
}

.mobile-submenu__link:hover {
  color: var(--color-white);
}

.mobile-menu__lang {
  margin-top: var(--space-8);
}

.mobile-menu__lang-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white-50);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  margin-bottom: var(--space-3);
}

.mobile-menu__lang-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.mobile-menu__lang-btn {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-white-20);
  border-radius: var(--radius-sm);
  color: var(--color-white-80);
  background: transparent;
  transition: all var(--transition-fast);
}

.mobile-menu__lang-btn:hover,
.mobile-menu__lang-btn.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.mobile-menu__inquiry {
  margin-top: var(--space-6);
  width: 100%;
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: var(--radius-md);
  text-align: center;
  transition: background var(--transition-fast);
}

.mobile-menu__inquiry:hover {
  background: var(--color-primary-dark);
}

/* ── Overlay Backdrop ────────────────────────────────── */
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: calc(var(--z-overlay) - 1);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.mobile-overlay.open {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 1023px) {
  .top-contact-bar__welcome {
    display: none;
  }
}

@media (max-width: 640px) {
  .top-contact-bar .container {
    gap: var(--space-2);
  }

  .top-contact-bar__contacts {
    position: static;
    width: 100%;
    justify-content: space-between;
    gap: var(--space-2);
    transform: none;
  }

  .top-contact-bar__contact {
    gap: var(--space-1);
    font-size: 0.6875rem;
  }

  .top-contact-bar__socials {
    display: none;
  }
}

/* ── Desktop Breakpoint ──────────────────────────────── */
@media (min-width: 1024px) {
  .main-nav            { display: block; }
  .lang-switcher       { display: block; }
  .btn-inquiry--header { display: inline-flex; align-items: center; }
  .hamburger           { display: none; }
  .mobile-menu         { display: none; }
  .mobile-overlay      { display: none; }
}

/* ===== components.css ===== */
/* ============================================================
   RLB Steel — Shared Component Styles
   按钮/卡片/徽章/面包屑/分页/标签/参数表格/产品详情模块
   ============================================================ */

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 2px solid transparent;
  line-height: 1;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

.btn--white {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn--white:hover {
  background: var(--color-primary-light);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-md);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
}

/* ── Cards — 统一8px圆角+柔和投影+hover上浮 ─────────── */
.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base),
              transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

.card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-dark);
}

.card__text {
  font-size: var(--font-size-sm);
  color: var(--color-dark-light);
  line-height: var(--line-height-normal);
}

/* 首页产品卡片：详情 + 询价双按钮 */
.home-product-card {
  display: flex;
  flex-direction: column;
}

.home-product-card .card__body {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.home-product-card .card__text {
  flex: 1;
  margin-bottom: var(--space-4);
}

.home-product-card__actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: auto;
}

.home-product-card__btn {
  min-width: 0;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.home-product-card__btn--view {
  color: #374151;
  background: #F3F4F6;
  border-color: #D1D5DB;
}

.home-product-card__btn--view:hover {
  background: #E9EBEF;
  border-color: #BCC1C9;
}

.home-product-card__btn--quote {
  color: #356AA8;
  background: #EEF5FF;
  border-color: #BFD4F5;
}

.home-product-card__btn--quote:hover {
  background: #E2EEFD;
  border-color: #9FBBE5;
}

@media (max-width: 420px) {
  .home-product-card__actions { gap: 6px; }
  .home-product-card__btn { height: 36px; font-size: 13px; }
}

/* 产品卡片 — 三级列表页9宫格 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
}

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

/* ── Section Heading ─────────────────────────────────── */
.section-heading {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-heading__label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  margin-bottom: var(--space-2);
}

.section-heading__title {
  font-size: var(--font-size-3xl);
  color: var(--color-dark);
  margin-bottom: var(--space-4);
}

.section-heading__desc {
  max-width: 640px;
  margin: 0 auto;
  font-size: var(--font-size-md);
  color: var(--color-dark-light);
}

/* ── Badge / Tag ─────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  line-height: 1.4;
}

.badge--primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

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

/* ── Breadcrumb ──────────────────────────────────────── */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-size: var(--font-size-sm);
}

.breadcrumb__item { color: var(--color-dark-light); }

.breadcrumb__item a {
  color: var(--color-dark-light);
  transition: color var(--transition-fast);
}

.breadcrumb__item a:hover { color: var(--color-primary); }

.breadcrumb__separator { color: var(--color-gray); }

.breadcrumb__current {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

/* ── Pagination ──────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-8) 0;
}

.pagination__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-dark);
  border: 1px solid var(--color-gray);
  background: var(--color-white);
  transition: all var(--transition-fast);
}

.pagination__btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination__btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.pagination__btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Spec Table — 产品参数表格 ──────────────────────── */
.spec-table {
  width: 100%;
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.spec-table th {
  background: var(--color-dark);
  color: var(--color-white);
  font-weight: var(--font-weight-semibold);
  text-align: left;
  padding: var(--space-3) var(--space-4);
}

.spec-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-gray);
  color: var(--color-dark-light);
}

.spec-table tr:last-child td { border-bottom: none; }

.spec-table tr:nth-child(even) td {
  background: var(--color-gray-light);
}

/* ── Product Detail — 6图浏览区 ─────────────────────── */
.detail-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 640px) {
  .detail-gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}

.detail-gallery__img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.detail-gallery__img:hover {
  transform: scale(1.03);
}

/* ── MOQ / Lead Time / Packing ──────────────────────── */
.detail-info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin: var(--space-6) 0;
}

@media (min-width: 640px) {
  .detail-info-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.detail-info-card {
  background: var(--color-gray-light);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  text-align: center;
}

.detail-info-card__label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-dark-light);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  margin-bottom: var(--space-2);
}

.detail-info-card__value {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-dark);
}

/* ── Fixed Inquiry button on detail page ─────────────── */
.detail-inquiry-fixed {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-sticky);
  display: none;
}

@media (min-width: 768px) {
  .detail-inquiry-fixed { display: block; }
}
/* ── Shared Inner-page Banner ────────────────────────── */
.inner-page-banner {
  --inner-page-banner-image: url("../images/company/company-factory.webp");
  width: 100%;
  background: var(--color-white);
}

.inner-page-banner__visual {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 142px;
  overflow: hidden;
  background-image:
    linear-gradient(90deg, rgba(30, 37, 47, 0.66), rgba(30, 37, 47, 0.58)),
    var(--inner-page-banner-image);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.inner-page-banner__visual::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(12,18,27,0.10));
}

.inner-page-banner__content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 142px;
  text-align: center;
}

.inner-page-banner__title {
  color: var(--color-white);
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: 0.035em;
  text-transform: uppercase;
  text-shadow: 0 2px 16px rgba(0,0,0,0.32);
}

.inner-page-banner__breadcrumb-row {
  height: 44px;
  background: var(--color-white);
  border-bottom: 1px solid #e4e7eb;
}

.inner-page-banner__breadcrumb {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 9px;
  overflow-x: auto;
  color: var(--color-dark-light);
  font-size: var(--font-size-sm);
  white-space: nowrap;
  scrollbar-width: none;
}

.inner-page-banner__breadcrumb::-webkit-scrollbar {
  display: none;
}

.inner-page-banner__position {
  color: var(--color-dark-light);
}

.inner-page-banner__position::before {
  margin-right: 7px;
  color: var(--color-primary);
  content: "⌂";
}

.inner-page-banner__breadcrumb a {
  color: var(--color-dark-light);
}

.inner-page-banner__breadcrumb a:hover {
  color: var(--color-primary);
}

.inner-page-banner__separator {
  color: var(--color-gray);
}

.inner-page-banner__current {
  color: var(--color-dark);
  font-weight: var(--font-weight-medium);
}

.inner-page-title-strip {
  padding: 10px 0 12px;
  background: var(--color-white);
}

.inner-page-title-strip__inner {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 72px;
  overflow: hidden;
  border: 1px solid #e2e7ee;
  background: linear-gradient(90deg, #f8fafc 0%, #f8fafc 74%, #f4f7fb 100%);
}

.inner-page-title-strip__marker {
  position: relative;
  z-index: 2;
  width: 4px;
  min-width: 4px;
  height: 40px;
  margin-left: 22px;
  border-radius: 2px;
  background: var(--color-primary);
}

.inner-page-title-strip__title {
  position: relative;
  z-index: 2;
  margin-left: 16px;
  color: var(--color-dark);
  font-size: clamp(1.45rem, 2.2vw, 2rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.inner-page-title-strip__decoration {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  display: flex;
  width: 34%;
  justify-content: flex-end;
  overflow: hidden;
  opacity: 0.72;
}

.inner-page-title-strip__decoration span {
  display: block;
  width: 120px;
  height: 140%;
  margin-top: -12%;
  margin-right: 30px;
  background: linear-gradient(135deg, rgba(15, 91, 197, 0.075), rgba(15, 91, 197, 0.018));
  transform: skewX(-29deg);
}

body.has-inner-page-banner #mainContent {
  padding-top: 0 !important;
}

body.has-inner-page-banner #mainContent .breadcrumb {
  display: none;
}

@media (max-width: 767px) {
  .inner-page-banner__visual,
  .inner-page-banner__content {
    min-height: 110px;
  }

  .inner-page-banner__title {
    font-size: clamp(1.45rem, 7vw, 1.9rem);
  }

  .inner-page-banner__breadcrumb-row {
    height: 42px;
  }

  .inner-page-banner__breadcrumb {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
    font-size: var(--font-size-xs);
  }

  .inner-page-title-strip {
    padding: 8px 0 10px;
  }

  .inner-page-title-strip__inner {
    min-height: 58px;
  }

  .inner-page-title-strip__marker {
    width: 3px;
    min-width: 3px;
    height: 32px;
    margin-left: 16px;
  }

  .inner-page-title-strip__title {
    margin-left: 12px;
    font-size: clamp(1.15rem, 5vw, 1.5rem);
  }

  .inner-page-title-strip__decoration {
    width: 42%;
    opacity: 0.5;
  }
}

/* ===== inquiry.css ===== */
/* ============================================================
   RLB Steel — Inquiry / CTA Styles
   浮动询盘栏/询盘表单/WhatsApp按钮/侧边CTA
   ============================================================ */

/* ── Floating Bottom Inquiry Bar (Mobile) ────────────── */
.inquiry-float {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--color-primary);
  color: var(--color-white);
  z-index: var(--z-sticky);
  padding: var(--space-3) 0;
  box-shadow: 0 -2px 10px rgba(0,0,0,0.15);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.inquiry-float.visible { transform: translateY(0); }

.inquiry-float .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.inquiry-float__text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.inquiry-float__btn {
  padding: var(--space-2) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  background: var(--color-white);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  white-space: nowrap;
}

.inquiry-float__btn:hover { background: var(--color-primary-light); }

/* ── Inquiry Form ────────────────────────────────────── */
.inquiry-form {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-8);
}

.inquiry-form__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-6);
}

.inquiry-form__group {
  margin-bottom: var(--space-4);
}

.inquiry-form__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-dark);
  margin-bottom: var(--space-1);
}

.inquiry-form__label .required {
  color: var(--color-error);
  margin-left: 2px;
}

.inquiry-form__input,
.inquiry-form__select,
.inquiry-form__textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius-md);
  background: var(--color-white);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

.inquiry-form__input:focus,
.inquiry-form__select:focus,
.inquiry-form__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.inquiry-form__input.error,
.inquiry-form__select.error,
.inquiry-form__textarea.error {
  border-color: var(--color-error);
}

.inquiry-form__input.valid,
.inquiry-form__select.valid,
.inquiry-form__textarea.valid {
  border-color: var(--color-success);
}

.inquiry-form__textarea {
  min-height: 120px;
  resize: vertical;
}

.inquiry-form__error {
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
  display: none;
}

.inquiry-form__error.show { display: block; }

.inquiry-form__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .inquiry-form__row--2 { grid-template-columns: 1fr 1fr; }
}

/* ── WhatsApp Button ─────────────────────────────────── */
.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  background: #25D366;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast),
              transform var(--transition-fast);
}

.btn-whatsapp:hover {
  background: #1DA851;
  transform: translateY(-1px);
}

@media (min-width: 1024px) {
  .inquiry-float   { display: none; }
}

/* ===== footer.css ===== */
/* ============================================================
   RLB Steel — Shared Footer
   Left: product/company/contact links
   Right: compact inquiry form
   ============================================================ */

.site-footer {
  background: var(--color-dark);
  color: var(--color-gray);
  padding-top: var(--space-10);
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: stretch;
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--color-white-10);
}

.footer-links-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-content: start;
}

@media (min-width: 640px) {
  .footer-links-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .footer-main {
    grid-template-columns: minmax(0, 1.08fr) minmax(440px, .92fr);
    gap: var(--space-10);
  }
}

.footer-col__title {
  position: relative;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  color: var(--color-white);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
}

.footer-col__title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-primary);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col__link {
  color: var(--color-gray);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-col__link:hover {
  color: var(--color-white);
  padding-left: var(--space-2);
}

.footer-contact__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: var(--font-size-sm);
}

.footer-contact__icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  fill: var(--color-primary);
}

.footer-contact__text a {
  color: var(--color-gray);
  transition: color var(--transition-fast);
}

.footer-contact__text a:hover {
  color: var(--color-white);
}

.footer-inquiry {
  align-self: stretch;
  min-width: 0;
  max-width: none;
  padding: var(--space-5);
  border-radius: var(--radius-md);
  box-shadow: none;
}

.footer-inquiry .inquiry-form__title {
  margin-bottom: var(--space-4);
  font-size: var(--font-size-lg);
}

.footer-inquiry .inquiry-form__row {
  gap: var(--space-3);
}

.footer-inquiry .inquiry-form__group {
  margin-bottom: var(--space-3);
}

.footer-inquiry .inquiry-form__label {
  margin-bottom: 4px;
  font-size: var(--font-size-xs);
}

.footer-inquiry .inquiry-form__input,
.footer-inquiry .inquiry-form__select,
.footer-inquiry .inquiry-form__textarea {
  box-sizing: border-box;
  max-width: 100%;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

.footer-inquiry .inquiry-form__textarea {
  min-height: 72px;
}

.footer-inquiry__submit {
  min-width: 112px;
  padding: 10px 22px;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-6) 0;
  color: var(--color-white-50);
  font-size: var(--font-size-xs);
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.footer-bottom__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom__links a {
  color: var(--color-white-50);
  transition: color var(--transition-fast);
}

.footer-bottom__links a:hover {
  color: var(--color-white);
}

/* ===== inquiry-popup.css ===== */
/* ============================================================
   RLB Steel — Quick Inquiry Popup (right-bottom corner)
   ============================================================ */

.inquiry-popup {
  position: fixed;
  bottom: 24px;
  right: 80px;
  z-index: 250;
  width: 350px;
  font-family: var(--font-primary);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  overflow: hidden;
}

@media (max-width: 576px) {
  .inquiry-popup {
    right: 12px;
    left: 12px;
    width: auto;
    bottom: 12px;
  }
}

.inquiry-popup__header {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
}

.inquiry-popup__title {
  margin: 0;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
}

.inquiry-popup__arrow {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  transition: transform var(--transition-base);
}

.inquiry-popup--collapsed .inquiry-popup__arrow {
  border-bottom: 6px solid var(--color-white);
  border-top: none;
}

.inquiry-popup--expanded .inquiry-popup__arrow {
  border-top: 6px solid var(--color-white);
  border-bottom: none;
}

.inquiry-popup__body {
  background: var(--color-white);
  padding: var(--space-4);
  display: none;
  max-height: 70vh;
  overflow-y: auto;
}

.inquiry-popup--expanded .inquiry-popup__body {
  display: block;
}

@media (max-width: 576px) {
  .inquiry-popup__body {
    max-height: 60vh;
  }
}

.inquiry-popup__field {
  margin-bottom: var(--space-3);
}

.inquiry-popup__input,
.inquiry-popup__textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-family: var(--font-primary);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-dark);
  box-sizing: border-box;
  outline: none;
  transition: border-color var(--transition-fast);
}

.inquiry-popup__input:focus,
.inquiry-popup__textarea:focus {
  border-color: var(--color-primary);
}

.inquiry-popup__input::placeholder,
.inquiry-popup__textarea::placeholder {
  color: var(--color-dark-light);
}

.inquiry-popup__textarea {
  resize: vertical;
  min-height: 60px;
}

.inquiry-popup__error {
  color: var(--color-error);
  font-size: var(--font-size-xs);
  margin: var(--space-1) 0 0;
  display: none;
}

.inquiry-popup__error--visible {
  display: block;
}

.inquiry-popup__submit {
  width: 100%;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-primary);
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.inquiry-popup__submit:hover {
  background: var(--color-primary-dark);
}

/* ===== product-quote-modal.css ===== */
/* ============================================================
   RLB Steel — Product Quote Modal
   ============================================================ */

.pq-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 1300;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 250ms ease, visibility 250ms ease;
  font-family: var(--font-primary);
}

.pq-overlay--open {
  opacity: 1;
  visibility: visible;
}

.pq-modal {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 600px;
  max-width: calc(100vw - 32px);
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  position: relative;
  padding: var(--space-8);
}

@media (max-width: 576px) {
  .pq-modal {
    max-width: calc(100vw - 24px);
    max-height: calc(100vh - 24px);
    padding: var(--space-5);
  }
}

.pq-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--color-dark-light);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.pq-close:hover {
  background: var(--color-gray-light);
}

.pq-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-dark);
  margin: 0 0 var(--space-2);
}

.pq-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-dark-light);
  margin: 0 0 var(--space-6);
}

.pq-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

@media (max-width: 576px) {
  .pq-row {
    grid-template-columns: 1fr;
  }
}

.pq-field__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-dark);
  margin-bottom: var(--space-1);
}

.pq-field__label .required {
  color: var(--color-error);
}

.pq-field__input,
.pq-field__textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-family: var(--font-primary);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-dark);
  box-sizing: border-box;
  outline: none;
  transition: border-color var(--transition-fast);
}

.pq-field__input:focus,
.pq-field__textarea:focus {
  border-color: var(--color-primary);
}

.pq-field__textarea {
  resize: vertical;
  min-height: 80px;
}

.pq-field__error {
  color: var(--color-error);
  font-size: var(--font-size-xs);
  margin: var(--space-1) 0 0;
  display: none;
}

.pq-field__error--visible {
  display: block;
}

.pq-submit {
  padding: var(--space-2) var(--space-8);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-primary);
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  margin-top: var(--space-2);
}

.pq-submit:hover {
  background: var(--color-primary-dark);
}

@media (max-width: 576px) {
  .pq-submit {
    width: 100%;
  }
}

/* Detail page info area additions */
.detail-summary__divider {
  border: none;
  border-top: 1px solid var(--color-gray);
  margin: var(--space-4) 0;
}

.detail-contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-dark);
}

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

.detail-contact__label {
  font-weight: var(--font-weight-medium);
  color: var(--color-dark);
}

.detail-contact__link {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.detail-contact__link:hover {
  color: var(--color-primary-dark);
}