/* ==========================================================================
   深圳市林川机械有限公司 - 官方网站样式表
   Shenzhen Linchuan Machinery Co., Ltd. - Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS 变量与设计规范
   -------------------------------------------------------------------------- */
:root {
  /* 品牌核心色彩 - 工业精工蓝与科技灰阶 */
  --primary-color: #1e50a2;        /* 经典工匠蓝 */
  --primary-hover: #163e80;
  --primary-light: #e8f0fe;
  --primary-gradient: linear-gradient(135deg, #1e50a2 0%, #0d2e66 100%);
  --accent-color: #0284c7;         /* 科技高光天蓝 */
  --accent-orange: #ea580c;        /* 重点警示/强调橙 */
  
  /* 文本与底色 */
  --text-main: #1e293b;            /* 墨黑正文 */
  --text-muted: #64748b;           /* 辅助灰 */
  --text-light: #94a3b8;           /* 浅灰文字 */
  --bg-main: #ffffff;
  --bg-alt: #f8fafc;              /* 浅灰区块底色 */
  --bg-dark: #0f172a;             /* 深色页脚/工业背景 */
  --bg-card: #ffffff;
  
  /* 边框与阴影 */
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 20px 30px -10px rgba(30, 80, 162, 0.18);
  
  /* 几何规范 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --container-max-width: 1240px;
  --header-height: 76px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   2. 基础与重置样式 (Reset & Base)
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  color: var(--text-main);
  background-color: var(--bg-main);
  line-height: 1.65;
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
  background: none;
}

/* --------------------------------------------------------------------------
   3. 通用工具类 (Layout Utilities)
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.section {
  padding: 90px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-alt);
}

.section-title-wrap {
  text-align: center;
  margin-bottom: 56px;
}

.section-subtitle {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary-color);
  background: var(--primary-light);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  display: block;
  width: 50px;
  height: 4px;
  background: var(--primary-gradient);
  margin: 14px auto 0;
  border-radius: 2px;
}

.section-desc {
  max-width: 680px;
  margin: 16px auto 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  line-height: 1;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(30, 80, 162, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 80, 162, 0.45);
  color: #ffffff;
}

.btn-secondary {
  background: #ffffff;
  color: var(--primary-color);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--primary-color);
  background: var(--primary-light);
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--accent-orange);
  color: #ffffff;
}

.btn-accent:hover {
  background: #c2410c;
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   4. 顶部导航栏 (Header & Navbar)
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  height: 68px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-img {
  height: 44px;
  width: auto;
  max-width: 260px;
  object-fit: contain;
  transition: all var(--transition-fast);
  display: block;
}

.site-header.scrolled .brand-logo-img {
  height: 38px;
}

.brand-logo-icon {
  width: 44px;
  height: 44px;
  background: var(--primary-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: 1px;
  box-shadow: 0 4px 10px rgba(30, 80, 162, 0.3);
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary-color);
  letter-spacing: 0.5px;
  line-height: 1.2;
}

.brand-en {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.975rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-phone-box {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary-color);
  padding: 6px 12px;
  background: var(--primary-light);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.header-phone-box:hover {
  background: #dbeafe;
}

.header-phone-box svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  flex-shrink: 0;
}

.nav-mobile-call {
  display: none;
  width: 100%;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  margin-top: 6px;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2.5px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.mobile-toggle.open span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}
.mobile-toggle.open span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle.open span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   5. 视觉焦点区 (Hero Section)
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 70px;
  background: linear-gradient(180deg, #f0f6ff 0%, #ffffff 100%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 30px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-color);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-title-highlight {
  color: var(--primary-color);
  background: linear-gradient(120deg, var(--primary-color) 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-image-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 4px solid #ffffff;
}

.hero-image-wrap img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.hero-image-wrap:hover img {
  transform: scale(1.03);
}

.hero-image-statusbar {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0) 0%, rgba(15, 23, 42, 0.85) 40%, rgba(15, 23, 42, 0.95) 100%);
  color: #ffffff;
  padding: 28px 20px 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.2px;
  z-index: 5;
  pointer-events: none;
}

.statusbar-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.statusbar-item svg {
  flex-shrink: 0;
}

.statusbar-divider {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.35);
}

/* 核心实力与数据看板 (Modern 4-Card Dashboard) */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.stat-card {
  background: #ffffff;
  padding: 22px 20px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.05);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary-color);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(30, 80, 162, 0.12);
  border-color: #bfdbfe;
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--primary-light);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.stat-icon-wrap svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.stat-card:hover .stat-icon-wrap {
  background: var(--primary-color);
  color: #ffffff;
  transform: scale(1.08);
}

.stat-text-wrap {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.stat-value-row {
  display: flex;
  align-items: baseline;
  gap: 3px;
  line-height: 1;
}

.stat-num {
  font-size: 1.85rem;
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.stat-unit {
  font-size: 1rem;
  font-weight: 800;
  color: var(--primary-color);
}

.stat-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 4px;
  white-space: nowrap;
}

.stat-sub {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --------------------------------------------------------------------------
   6. 公司简介与四大核心优势 (About Us)
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: stretch;
}

.about-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 36px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
}

.about-card-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--primary-light);
}

.about-card-title svg {
  width: 28px;
  height: 28px;
  fill: var(--primary-color);
}

.about-text {
  color: var(--text-main);
  line-height: 1.85;
  font-size: 1rem;
  margin-bottom: 24px;
}

.about-industry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.industry-tag {
  background: var(--primary-light);
  color: var(--primary-color);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: auto;
}

.advantage-item {
  background: var(--bg-alt);
  padding: 16px;
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary-color);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.advantage-item:hover {
  background: #ffffff;
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.advantage-item h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 6px;
}

.advantage-item p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 企业历史时间轴 (Timeline) */
.timeline-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: 36px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  height: 100%;
}

.timeline-list {
  position: relative;
  padding-left: 32px;
  margin-top: 16px;
}

.timeline-list::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 11px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-color) 0%, #93c5fd 100%);
}

.timeline-node {
  position: relative;
  margin-bottom: 24px;
}

.timeline-node:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -32px;
  top: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ffffff;
  border: 3px solid var(--primary-color);
  box-shadow: 0 0 0 4px var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: all var(--transition-fast);
}

.timeline-node:hover .timeline-dot {
  background: var(--primary-color);
  border-color: #ffffff;
  transform: scale(1.2);
}

.timeline-content {
  background: var(--bg-alt);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

.timeline-node:hover .timeline-content {
  background: #ffffff;
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.timeline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.timeline-year {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary-color);
}

.timeline-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
}

.timeline-tag.type-error { background: #fee2e2; color: #dc2626; }
.timeline-tag.type-info { background: #e0f2fe; color: #0284c7; }
.timeline-tag.type-success { background: #dcfce7; color: #16a34a; }
.timeline-tag.type-warning { background: #fef3c7; color: #d97706; }

.timeline-desc {
  font-size: 0.9rem;
  color: var(--text-main);
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   7. 业务范围与核心加工工艺 (Services & Business Scope)
   -------------------------------------------------------------------------- */
.services-list {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(30, 80, 162, 0.3);
}

.service-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
}

.service-card.reverse .service-grid {
  direction: rtl;
}

.service-card.reverse .service-info,
.service-card.reverse .service-media {
  direction: ltr;
}

.service-info {
  padding: 40px 48px;
}

.service-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-color);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.service-title {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
  padding-bottom: 8px;
}

.service-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background: var(--accent-color);
  border-radius: 2px;
}

.service-desc {
  font-size: 0.975rem;
  color: var(--text-main);
  line-height: 1.85;
  margin-bottom: 24px;
}

.service-features {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.feature-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-alt);
  padding: 6px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.feature-pill svg {
  width: 16px;
  height: 16px;
  fill: #16a34a;
}

.service-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.service-media {
  position: relative;
  height: 100%;
  min-height: 320px;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow: hidden;
}

.service-img-wrap {
  width: 100%;
  max-width: 440px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
  cursor: zoom-in;
}

.service-img-wrap img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.service-img-wrap:hover img {
  transform: scale(1.06);
}

.zoom-hint {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(15, 23, 42, 0.7);
  color: #ffffff;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.service-img-wrap:hover .zoom-hint {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   8. 品质保障与设备能力 (Quality & Capabilities)
   -------------------------------------------------------------------------- */
.quality-steps-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-bottom: 50px;
}

.quality-step-item {
  background: #ffffff;
  padding: 24px 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
}

.quality-step-item:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.step-num {
  width: 36px;
  height: 36px;
  background: var(--primary-light);
  color: var(--primary-color);
  font-weight: 800;
  font-size: 1rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
}

.step-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.step-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.quality-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.q-feat-card {
  background: #ffffff;
  padding: 32px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 20px;
  transition: all var(--transition-normal);
}

.q-feat-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.q-feat-icon {
  width: 52px;
  height: 52px;
  background: var(--primary-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--primary-color);
}

.q-feat-icon svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.q-feat-content h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.q-feat-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   9. 业务联系与公司地址 (Contact & Location)
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: stretch;
}

.contact-box {
  background: #ffffff;
  padding: 36px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
}

.contact-box-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-box-title svg {
  width: 24px;
  height: 24px;
  fill: var(--primary-color);
}

.contact-channel-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-channel-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 14px 18px;
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

.contact-channel-item:hover {
  background: var(--primary-light);
  border-color: var(--primary-color);
  transform: translateX(4px);
}

.channel-icon {
  width: 42px;
  height: 42px;
  background: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.channel-icon svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.channel-text-wrap {
  display: flex;
  flex-direction: column;
}

.channel-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.channel-val {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

/* 微信二维码卡片 */
.contact-wechat-box {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dashed var(--border-color);
}

.qr-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-alt);
  padding: 18px 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
}

.qr-card img {
  width: 110px;
  height: 110px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  background: #ffffff;
  padding: 4px;
  flex-shrink: 0;
}

/* 厂区地图卡片 */
.map-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  cursor: zoom-in;
  margin-top: auto;
}

.map-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

/* --------------------------------------------------------------------------
   10. 页脚 (Footer)
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-dark);
  color: #94a3b8;
  padding: 70px 0 30px;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand h3 {
  color: #ffffff;
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.footer-brand p {
  line-height: 1.7;
  margin-bottom: 20px;
  color: #94a3b8;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--accent-color);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a:hover {
  color: #ffffff;
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   11. 右侧悬浮快捷挂件 (Floating Action Bar)
   -------------------------------------------------------------------------- */
.floating-bar {
  position: fixed;
  right: 24px;
  bottom: 40px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 990;
}

.float-btn {
  width: 48px;
  height: 48px;
  background: #ffffff;
  color: var(--primary-color);
  border-radius: 50%;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all var(--transition-normal);
  border: 1px solid var(--border-color);
}

.float-btn svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.float-btn:hover {
  background: var(--primary-color);
  color: #ffffff;
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 10px 20px rgba(30, 80, 162, 0.3);
}

.float-btn.btn-totop {
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}

.float-btn.btn-totop.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* 微信二维码浮层 */
.float-qr-popover {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%) scale(0.9);
  background: #ffffff;
  padding: 12px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-color);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
  width: 140px;
  text-align: center;
}

.float-qr-popover img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

.float-qr-popover p {
  font-size: 0.75rem;
  color: var(--text-main);
  margin-top: 6px;
  font-weight: 600;
}

.float-btn:hover .float-qr-popover {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) scale(1);
}

/* --------------------------------------------------------------------------
   12. 模态窗与全屏图片灯箱 (Modal & Lightbox)
   -------------------------------------------------------------------------- */
.lightbox-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  padding: 24px;
}

.lightbox-modal.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 85vh;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  transform: scale(0.92);
  transition: transform var(--transition-normal);
}

.lightbox-modal.active .lightbox-content {
  transform: scale(1);
}

.lightbox-content img {
  max-width: 100%;
  max-height: 80vh;
  display: block;
  object-fit: contain;
}

.lightbox-caption {
  background: rgba(15, 23, 42, 0.85);
  color: #ffffff;
  padding: 12px 20px;
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: #ffffff;
  color: var(--text-main);
  transform: rotate(90deg);
}

/* 提示弹窗 (Toast Alert) */
.toast-notice {
  position: fixed;
  top: 90px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: #10b981;
  color: #ffffff;
  padding: 14px 28px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: var(--shadow-xl);
  z-index: 2100;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast-notice.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* --------------------------------------------------------------------------
   13. 响应式布局与媒体查询 (Responsive Breakpoints)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-image-wrap {
    max-width: 600px;
    margin: 0 auto;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .service-grid {
    grid-template-columns: 1fr;
  }
  
  .service-card.reverse .service-grid {
    direction: ltr;
  }
  
  .service-info {
    padding: 32px 24px;
  }
  
  .quality-steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .quality-showcase-card {
    grid-template-columns: 1fr !important;
  }
  
  .quality-features-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }
  
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-mobile-call {
    display: block;
  }
  
  .nav-actions .btn-quote {
    display: none;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  
  .quality-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-media-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .floating-bar {
    right: 16px;
    bottom: 20px;
  }
}

@media (max-width: 768px) {
  .brand-logo-img {
    height: 36px;
    max-width: 175px;
  }

  .header-phone-box {
    padding: 0;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    justify-content: center;
    background: var(--primary-light);
  }

  .header-phone-box .phone-text {
    display: none;
  }

  .header-phone-box svg {
    width: 18px;
    height: 18px;
  }

  .nav-actions {
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .brand-logo-img {
    height: 30px;
    max-width: 140px;
  }

  .header-phone-box {
    width: 34px;
    height: 34px;
  }

  .header-phone-box svg {
    width: 16px;
    height: 16px;
  }

  .mobile-toggle {
    width: 34px;
    height: 34px;
  }

  .hero-title {
    font-size: 1.8rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .stat-card {
    padding: 16px 18px;
  }
  
  .quality-steps-grid {
    grid-template-columns: 1fr;
  }

  .hero-image-statusbar {
    flex-direction: column;
    gap: 6px;
    padding: 20px 12px 10px;
    font-size: 0.8rem;
  }

  .statusbar-divider {
    display: none;
  }
}