/* 
 * 聆风AI (Lingfeng AI) 官方网站核心样式表
 * 风格定位：浅天蓝/晨曦白玻璃微拟态 (Light Glassmorphism)
 * 遵循现代 Web 开发规范：纯 Vanilla CSS，高度响应式，无多余外部依赖
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* ==========================================================================
   1. 设计系统变量 (Design System Tokens)
   ========================================================================== */
:root {
  /* 色彩体系 */
  --bg-gradient-start: #FFFFFF;
  --bg-gradient-end: #F0F7FF;
  --bg-gradient-aux: #E0F2FE;
  
  --primary-gradient: linear-gradient(135deg, #0EA5E9 0%, #2563EB 100%);
  --primary-color: #0EA5E9;
  --primary-dark: #1D4ED8;
  --primary-light: #E0F2FE;
  
  --accent-green: #10B981;
  --accent-green-light: #D1FAE5;
  --accent-gold: #F59E0B;
  --accent-gold-light: #FEF3C7;
  
  --text-main: #0F172A;      /* Slate 900 */
  --text-muted: #475569;     /* Slate 600 */
  --text-light: #94A3B8;     /* Slate 400 */
  
  --border-light: rgba(14, 165, 233, 0.12);
  --border-glass: rgba(255, 255, 255, 0.6);
  --bg-glass: rgba(255, 255, 255, 0.72);
  
  /* 阴影体系 */
  --shadow-sm: 0 2px 8px -2px rgba(14, 165, 233, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(14, 165, 233, 0.08);
  --shadow-lg: 0 20px 40px -10px rgba(14, 165, 233, 0.12);
  --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.04);
  
  /* 字体系统 */
  --font-family-title: 'Outfit', 'Inter', -apple-system, sans-serif;
  --font-family-body: 'Inter', -apple-system, system-ui, sans-serif;
  
  /* 其它变量 */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --max-width-content: 1200px;
}

/* ==========================================================================
   2. 基础复位与全局样式 (Reset & Base)
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family-body);
  color: var(--text-main);
  background: var(--bg-gradient-start);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  position: relative;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

/* ==========================================================================
   3. 背景极光与网格粒子 (Ambient Aurora & Grid Background)
   ========================================================================== */
body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 50%, var(--bg-gradient-aux) 100%);
  z-index: -3;
}

/* 慢速极光呼吸背景效果 */
.aurora-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: -2;
  pointer-events: none;
}

.aurora-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  mix-blend-mode: multiply;
  animation: aurora-float 20s infinite alternate ease-in-out;
}

.glow-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.4) 0%, rgba(56, 189, 248, 0.05) 70%);
  top: -10%;
  right: -5%;
  animation-delay: 0s;
}

.glow-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.3) 0%, rgba(110, 231, 183, 0.05) 70%);
  top: 40%;
  left: -10%;
  animation-duration: 25s;
  animation-delay: -5s;
}

.glow-3 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.25) 0%, rgba(165, 180, 252, 0.05) 70%);
  bottom: -5%;
  right: 15%;
  animation-duration: 18s;
  animation-delay: -3s;
}

@keyframes aurora-float {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  50% {
    transform: translate(50px, -30px) scale(1.1) rotate(60deg);
  }
  100% {
    transform: translate(-30px, 40px) scale(0.95) rotate(120deg);
  }
}

/* 极简精致科技网格 */
.tech-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1000px;
  background-image: 
    linear-gradient(rgba(14, 165, 233, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  z-index: -1;
  pointer-events: none;
}

/* ==========================================================================
   4. 玻璃拟态核心与卡片通用设计 (Glassmorphism Elements)
   ========================================================================== */
.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glass), var(--shadow-sm);
  transition: var(--transition-smooth);
}

.glass-panel:hover {
  box-shadow: var(--shadow-glass), var(--shadow-md);
  border-color: rgba(14, 165, 233, 0.24);
  transform: translateY(-4px);
}

/* ==========================================================================
   5. 响应式布局容器 (Grid & Layouts)
   ========================================================================== */
.container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 50px;
  background: rgba(14, 165, 233, 0.08);
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 1px;
  margin-bottom: 16px;
  border: 1px solid rgba(14, 165, 233, 0.15);
  font-family: var(--font-family-title);
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-family-title);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* ==========================================================================
   6. 顶栏导航栏样式 (Header & Navigation)
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 80px;
  display: flex;
  align-items: center;
  transition: var(--transition-smooth);
}

.header.scrolled {
  height: 70px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.06);
  border-bottom: 1px solid rgba(14, 165, 233, 0.08);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-family-title);
  font-size: 1.45rem;
  font-weight: 800;
  transition: var(--transition-smooth);
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.18);
  object-fit: cover;
  flex: 0 0 auto;
}

.logo-text {
  color: var(--primary-dark);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@keyframes logo-pulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  100% { transform: scale(1.2); opacity: 1; }
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 32px;
}

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
  padding: 6px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: var(--transition-smooth);
}

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

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* 按钮基础定义 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
  font-family: var(--font-family-body);
}

.btn-primary {
  background: var(--primary-gradient);
  color: #FFFFFF;
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(14, 165, 233, 0.4);
}

.btn-secondary {
  background: rgba(14, 165, 233, 0.08);
  border: 1px solid rgba(14, 165, 233, 0.15);
  color: var(--primary-color);
}

.btn-secondary:hover {
  background: rgba(14, 165, 233, 0.15);
  transform: translateY(-2px);
}

/* 本地图标映射，替代外部 Font Awesome CDN */
.fa-solid {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-style: normal;
  line-height: 1;
}

.fa-plug-circle-bolt::before { content: "⚡"; }
.fa-layer-group::before { content: "▦"; }
.fa-comments::before { content: "💬"; }
.fa-mobile-screen-button::before { content: "▯"; }
.fa-route::before { content: "↗"; }
.fa-eye-slash::before { content: "◌"; }
.fa-hotel::before { content: "▣"; }
.fa-map-location-dot::before { content: "⌖"; }
.fa-location-dot::before { content: "●"; }
.fa-envelope::before { content: "✉"; }
.fa-arrow-right-long::before { content: "→"; }
.fa-spinner::before { content: "↻"; }
.fa-circle-exclamation::before { content: "!"; }
.fa-circle-check::before { content: "✓"; }
.fa-xmark::before { content: "×"; }

.fa-spin {
  animation: fa-spin 1s linear infinite;
}

@keyframes fa-spin {
  to {
    transform: rotate(360deg);
  }
}

/* 语言切换滑块 */
.lang-switch {
  display: flex;
  background: rgba(14, 165, 233, 0.06);
  border: 1px solid rgba(14, 165, 233, 0.1);
  padding: 3px;
  border-radius: 50px;
  cursor: pointer;
  position: relative;
  width: 84px;
  height: 34px;
  user-select: none;
}

.lang-btn {
  flex: 1;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 26px;
  color: var(--text-light);
  z-index: 2;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.lang-btn.active {
  color: var(--primary-color);
}

.lang-slider {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 38px;
  height: 28px;
  border-radius: 50px;
  background: #FFFFFF;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  z-index: 1;
}

.lang-switch.en .lang-slider {
  transform: translateX(40px);
}

/* 移动端汉堡菜单按钮 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1002;
  -webkit-tap-highlight-color: transparent;
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition-smooth);
  transform-origin: center;
}

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

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

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

/* 移动端导航遮罩层 */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(9, 13, 26, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-nav-overlay.active {
  display: block;
  opacity: 1;
}

/* 移动端导航抽屉 */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  height: 100dvh;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1001;
  padding: 100px 24px 40px;
  transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.08);
  border-left: 1px solid rgba(14, 165, 233, 0.08);
  overflow-y: auto;
}

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

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  padding: 14px 20px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 600;
  font-family: var(--font-family-title);
  border-radius: var(--radius-sm);
  transition: var(--transition-smooth);
}

.mobile-nav-link:hover,
.mobile-nav-link:active {
  background: rgba(14, 165, 233, 0.08);
  color: var(--primary-color);
  transform: translateX(4px);
}

/* ==========================================================================
   7. 首屏样式 (Hero Section)
   ========================================================================== */
.hero {
  min-height: 100vh;
  padding-top: 140px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 50px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-tag-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: logo-pulse 1.5s infinite alternate ease-in-out;
}

.hero-title {
  font-family: var(--font-family-title);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
  color: var(--text-main);
}

.hero-title span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  gap: 16px;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-source-set {
  display: contents;
}

.image-source-set > source {
  display: none;
}

.hero-img {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
  transition: var(--transition-smooth);
}

.hero-visual:hover .hero-img {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.visual-backdrop {
  position: absolute;
  width: 110%;
  height: 110%;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
  z-index: -1;
}

/* ==========================================================================
   8. 关于聆风模块 (About Section)
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 60px;
}

.about-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-glass);
}

.about-content-title {
  font-family: var(--font-family-title);
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-main);
}

.about-text {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 1rem;
  text-align: justify;
}

.culture-heading {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary-color);
  font-family: var(--font-family-title);
}

.culture-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.culture-card {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid rgba(14, 165, 233, 0.06);
}

.culture-card-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
  color: var(--text-main);
}

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

.location-section-title {
  text-align: center;
  font-size: 1.5rem;
  font-family: var(--font-family-title);
  font-weight: 700;
  margin: 60px 0 30px 0;
}

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

.location-card {
  padding: 30px 24px;
  text-align: center;
}

.location-card i {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 16px;
  display: block;
}

.location-name {
  font-family: var(--font-family-title);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.location-role {
  color: var(--primary-color);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.location-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ==========================================================================
   9. 核心产品与技术体系 ("三位一体" 架构板块)
   ========================================================================== */
.tech-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 50px;
  align-items: center;
}

.architecture-portal {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.arch-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 24px;
  cursor: pointer;
}

.arch-card.active {
  background: #FFFFFF;
  border-color: rgba(14, 165, 233, 0.3);
  box-shadow: var(--shadow-md);
}

.arch-card.active .arch-icon {
  background: var(--primary-color);
  color: #FFFFFF;
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.4);
}

.arch-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(14, 165, 233, 0.08);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  transition: var(--transition-smooth);
  flex-shrink: 0;
}

.arch-body h3 {
  font-family: var(--font-family-title);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
}

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

.tech-showcase {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.showcase-media {
  position: relative;
  display: flex;
  justify-content: center;
}

.showcase-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-glass);
}

/* ==========================================================================
   10. 松松管家产品入口与产品页 (Product Overview & Page)
   ========================================================================== */
.product-overview-section {
  background: rgba(14, 165, 233, 0.018);
}

.product-overview-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 50px;
  align-items: center;
}

.product-overview-copy .section-header,
.product-overview-copy {
  text-align: left;
}

.product-overview-desc {
  max-width: 680px;
}

.product-mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.product-mode-card {
  padding: 22px;
}

.product-mode-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(14, 165, 233, 0.1);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  font-size: 1.15rem;
}

.product-mode-card h3 {
  font-family: var(--font-family-title);
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.product-mode-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.product-overview-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.product-overview-visual {
  padding: 18px;
  overflow: hidden;
}

.product-overview-img {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}

.product-page-main {
  padding-top: 72px;
}

.product-hero {
  padding-top: 120px;
}

.product-hero-layout {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.product-hero-title {
  font-family: var(--font-family-title);
  font-size: 3.2rem;
  line-height: 1.15;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 18px;
}

.product-hero-subtitle {
  font-size: 1.35rem;
  color: var(--primary-color);
  font-weight: 700;
  margin-bottom: 18px;
}

.product-hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 680px;
}

.product-hero-media {
  padding: 18px;
}

.product-hero-img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.product-section-band {
  background: rgba(14, 165, 233, 0.018);
}

.product-feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.delivery-grid,
.capability-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.delivery-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.product-feature-card,
.delivery-card,
.capability-column {
  padding: 28px;
}

.product-feature-card i,
.delivery-card-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(14, 165, 233, 0.1);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.product-feature-card h3,
.delivery-card h3,
.capability-column h3 {
  font-family: var(--font-family-title);
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.product-feature-card p,
.delivery-card p,
.product-cta-panel p {
  color: var(--text-muted);
}

.capability-column ul {
  list-style: none;
  display: grid;
  gap: 12px;
}

.capability-column li {
  padding-left: 18px;
  position: relative;
  color: var(--text-muted);
}

.capability-column li::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary-color);
  position: absolute;
  left: 0;
  top: 0.62em;
}

.product-cta-panel {
  padding: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.product-cta-panel h2 {
  font-family: var(--font-family-title);
  font-size: 1.8rem;
  margin-bottom: 12px;
}

/* ==========================================================================
   10. 松松管家在线对话智能模拟器 (Chat Simulator)
   ========================================================================== */
.simulator-panel {
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(14, 165, 233, 0.15);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 420px;
}

.sim-header {
  background: #F8FAFC;
  border-bottom: 1px solid #E2E8F0;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sim-header-title {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sim-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: logo-pulse 1.5s infinite alternate ease-in-out;
}

.sim-body {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: #F0F7FF;
}

.msg {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-width: 85%;
  animation: msg-fade-in 0.4s ease forwards;
}

.msg-user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.msg-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.msg-user .msg-avatar {
  background: rgba(14, 165, 233, 0.12);
  color: var(--primary-color);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

.msg-agent .msg-avatar {
  background: var(--primary-gradient);
  color: #FFFFFF;
}

.msg-bubble {
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 0.9rem;
  line-height: 1.5;
  position: relative;
}

.msg-user .msg-bubble {
  background: var(--primary-gradient);
  color: #FFFFFF;
  border-top-right-radius: 2px;
}

.msg-agent .msg-bubble {
  background: #FFFFFF;
  color: var(--text-main);
  border-top-left-radius: 2px;
  box-shadow: 0 4px 10px rgba(14, 165, 233, 0.04);
}

.msg-system {
  align-self: center;
  max-width: 90%;
}

.msg-system .msg-bubble {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  font-size: 0.8rem;
  border-radius: 8px;
  padding: 6px 12px;
  text-align: center;
  font-weight: 500;
}

@keyframes msg-fade-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.sim-footer {
  padding: 12px 20px;
  background: #F8FAFC;
  border-top: 1px solid #E2E8F0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sim-prompt-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}

.sim-chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.sim-chip {
  padding: 6px 14px;
  background: #FFFFFF;
  border: 1px solid rgba(14, 165, 233, 0.18);
  border-radius: 50px;
  font-size: 0.78rem;
  color: var(--primary-color);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  white-space: nowrap;
}

.sim-chip:hover {
  background: rgba(14, 165, 233, 0.08);
  transform: translateY(-1px);
}

.sim-chip.active {
  background: var(--primary-gradient);
  color: #FFFFFF;
  border-color: transparent;
}

/* ==========================================================================
   11. 新闻动态板块 (Company News)
   ========================================================================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.news-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  height: 100%;
}

.news-card-img {
  width: 100%;
  height: 200px;
  display: block;
  object-fit: cover;
  object-position: center;
  flex-shrink: 0;
  transition: var(--transition-smooth);
}

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

.article-panel {
  padding: 40px;
  max-width: 850px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.article-hero-img {
  display: block;
  width: 100%;
  height: 350px;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius-sm);
  margin-bottom: 30px;
}

.article-content h2 {
  font-family: var(--font-family-title);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 36px;
  margin-bottom: 16px;
}

.article-content h3 {
  font-family: var(--font-family-title);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-content p,
.article-content ul,
.article-content ol,
.article-content blockquote {
  margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
  padding-left: 1.4em;
}

.article-content a {
  color: var(--primary-color);
  font-weight: 700;
  text-decoration: none;
}

.article-content a:hover {
  text-decoration: underline;
}

.article-inline-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: contain;
  object-position: center;
  border-radius: var(--radius-sm);
  margin: 28px auto;
}

.news-card-body {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-glass);
}

.news-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 12px;
  font-weight: 500;
}

.news-tag {
  color: var(--primary-color);
  font-weight: 700;
}

.news-card-title {
  font-family: var(--font-family-title);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  color: var(--text-main);
  transition: var(--transition-smooth);
}

.news-card:hover .news-card-title {
  color: var(--primary-color);
}

.news-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-more {
  margin-top: auto;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-color);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.news-more i {
  transition: var(--transition-smooth);
}

.news-card:hover .news-more i {
  transform: translateX(4px);
}

/* ==========================================================================
   12. 商务留言与预约演示板块 (Contact Form)
   ========================================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.contact-info-title {
  font-family: var(--font-family-title);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.25;
}

.contact-info-title span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-item-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(14, 165, 233, 0.08);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.contact-item-text {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.contact-item-text strong {
  color: var(--text-main);
}

.contact-form-panel {
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(14, 165, 233, 0.15);
  font-family: var(--font-family-body);
  font-size: 0.95rem;
  color: var(--text-main);
  outline: none;
  transition: var(--transition-smooth);
}

.form-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.12);
  background: #FFFFFF;
}

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

.btn-block {
  width: 100%;
}

/* ==========================================================================
   13. 页脚样式 (Footer)
   ========================================================================== */
.footer {
  background: #090D1A;
  color: #94A3B8;
  padding: 80px 0 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  font-family: var(--font-family-title);
  font-size: 1.5rem;
  font-weight: 800;
  color: #FFFFFF;
  text-decoration: none;
}

.footer-logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.22);
  object-fit: cover;
  flex: 0 0 auto;
}

.footer-logo-text {
  color: #FFFFFF;
}

.footer-brand-desc {
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-title {
  font-family: var(--font-family-title);
  color: #FFFFFF;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  color: #94A3B8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

.footer-link:hover {
  color: #FFFFFF;
  transform: translateX(2px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.footer-copyright {
  color: #64748B;
}

.footer-legal {
  display: flex;
  gap: 24px;
}

.footer-legal-link {
  color: #64748B;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.footer-legal-link:hover {
  color: #94A3B8;
}

/* ==========================================================================
   14. 全端交互弹层与反馈 (Modal & Toast Portal)
   ========================================================================== */
.js-lightbox-enabled {
  cursor: zoom-in;
}

.js-lightbox-enabled:focus-visible {
  outline: 3px solid rgba(14, 165, 233, 0.36);
  outline-offset: 4px;
}

@media (hover: hover) {
  .js-lightbox-enabled:hover {
    filter: saturate(1.04) brightness(1.02);
  }
}

.image-lightbox-portal {
  position: fixed;
  inset: 0;
  z-index: 2600;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  background: rgba(9, 13, 26, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s ease;
}

.image-lightbox-portal.active {
  opacity: 1;
  pointer-events: auto;
}

.image-lightbox-content {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  max-width: min(96vw, 1400px);
  max-height: 92vh;
}

.image-lightbox-img {
  display: block;
  width: auto;
  height: auto;
  max-width: min(96vw, 1400px);
  max-height: 82vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
  background: #FFFFFF;
}

.image-lightbox-close {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 1;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.72);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--transition-smooth);
}

.image-lightbox-close:hover,
.image-lightbox-close:focus-visible {
  background: #FFFFFF;
  color: var(--text-main);
  outline: none;
}

.image-lightbox-caption {
  max-width: min(92vw, 980px);
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.92rem;
  line-height: 1.6;
  text-align: center;
}

.modal-portal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(9, 13, 26, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.modal-portal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  max-width: 650px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 40px;
  position: relative;
  transform: translateY(20px) scale(0.95);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-portal.active .modal-content {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(14, 165, 233, 0.06);
  border: 1px solid rgba(14, 165, 233, 0.1);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

.modal-close:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #EF4444;
  transform: rotate(90deg);
}

.modal-img {
  width: 100%;
  height: 250px;
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

.modal-body-title {
  font-family: var(--font-family-title);
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.modal-body-meta {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 20px;
  font-weight: 500;
}

.modal-body-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.modal-body-text p {
  margin-bottom: 16px;
}

/* 反馈气泡通知 */
.toast-container {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 16px 24px;
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  border: 1px solid var(--accent-green);
  color: var(--text-main);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateX(120%);
  animation: toast-slide-in 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  position: relative;
  overflow: hidden;
}

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--accent-green);
  width: 100%;
  animation: toast-progress-anim 4s linear forwards;
}

@keyframes toast-slide-in {
  to { transform: translateX(0); }
}

@keyframes toast-progress-anim {
  to { width: 0; }
}

/* ==========================================================================
   15. 响应式布局自适应 (Responsive Queries)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  .about-grid,
  .tech-layout,
  .contact-layout,
  .product-overview-layout,
  .product-hero-layout,
  .product-feature-grid,
  .delivery-grid,
  .capability-columns {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .tech-showcase {
    order: -1;
  }
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  .header {
    height: 70px;
  }
  .nav-menu {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  #nav-cta-btn {
    display: none;
  }
  .hero {
    padding-top: 100px;
  }
  .hero-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-tag {
    justify-content: center;
  }
  .hero-ctas {
    justify-content: center;
  }
  .product-mode-grid {
    grid-template-columns: 1fr;
  }
  .product-overview-copy,
  .product-overview-copy .section-header {
    text-align: center;
  }
  .product-overview-ctas {
    justify-content: center;
  }
  .product-hero-title {
    font-size: 2.35rem;
  }
  .product-hero {
    padding-top: 100px;
  }
  .product-hero-copy {
    text-align: center;
  }
  .product-hero-copy .hero-ctas {
    justify-content: center;
  }
  .product-cta-panel {
    flex-direction: column;
    text-align: center;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .article-hero-img {
    height: auto;
    aspect-ratio: 16 / 9;
  }
  .article-panel {
    padding: 20px;
  }
  .image-lightbox-portal {
    padding: 14px;
  }
  .image-lightbox-img {
    max-width: 94vw;
    max-height: 78vh;
  }
  .image-lightbox-close {
    top: 10px;
    right: 10px;
  }
  .location-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}