/* ============================================
   西安莱驰云信息科技有限公司 - 主样式文件
   主题：深蓝科技风
   版本：2.0.0 (全面重构版 - 无外部依赖)
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --primary:       #0A1628;
  --primary-dark:  #060E1C;
  --primary-mid:   #0F2040;
  --accent:        #1D6FA4;
  --accent-light:  #2A8FD4;
  --accent-glow:   #3AAFE4;
  --gold:          #F0A500;
  --gold-light:    #FFB830;
  /* 新增辅助色 */
  --cyan:          #00D4FF;          /* 青色点缀 */
  --purple:        #8B5CF6;          /* 紫色点缀（谨慎使用）*/
  --success:       #10B981;          /* 成功状态 */
  --warning:       #F59E0B;          /* 警告状态 */
  
  --text-light:    #E8EDF4;
  --text-muted:    #9AB5D0;      /* 提升对比度：从 #7A9AC0 → #9AB5D0 (4.8:1) */
  --text-dim:      #6B8FA8;      /* 提升对比度：从 #4A6A8A → #6B8FA8 (3.8:1) */
  --border:        rgba(45,120,180,0.18);
  --border-glow:   rgba(58,175,228,0.35);
  --card-bg:       rgba(13,28,52,0.85);
  --card-bg-hover: rgba(18,40,72,0.95);
  --white:         #ffffff;
  
  /* 新增渐变 */
  --gradient-primary: linear-gradient(135deg, #1D6FA4 0%, #3AAFE4 100%);
  --gradient-gold: linear-gradient(135deg, #F0A500 0%, #FFB830 100%);
  --gradient-hero: linear-gradient(135deg, rgba(29,111,164,0.15) 0%, rgba(58,175,228,0.08) 100%);
  
  --section-pad:   120px 0;          /* 从 80px 增加到 120px */
  --radius:        12px;             /* 从 8px 增加到 12px，更圆润 */
  --radius-lg:     20px;             /* 从 14px 增加到 20px */
  --shadow-card:   0 4px 24px rgba(0,10,30,0.45);
  --shadow-hover:  0 8px 40px rgba(0,10,30,0.65);
  --transition:    0.3s cubic-bezier(0.25,0.8,0.25,1);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  /* 优化的系统字体栈：优先使用系统中已安装的高质量中文字体 */
  font-family: 
    -apple-system,                          /* macOS/iOS 系统字体 */
    BlinkMacSystemFont,                     /* macOS 新版字体 */
    "Segoe UI",                             /* Windows 10+ */
    "PingFang SC",                          /* macOS 中文 */
    "Hiragino Sans GB",                     /* macOS 旧版中文 */
    "Microsoft YaHei",                      /* Windows 中文 */
    "Microsoft YaHei UI",                   /* Windows 中文 UI */
    "Source Han Sans SC",                   /* Adobe 思源黑体 */
    "Noto Sans SC",                         /* Google 思源黑体（如已安装）*/
    "Helvetica Neue",                       /* 西文备用 */
    Helvetica,
    Arial,
    sans-serif;
  background: var(--primary);
  color: var(--text-light);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;       /* Firefox macOS 优化 */
  text-rendering: optimizeLegibility;       /* 提升可读性 */
  font-weight: 400;
}

a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---------- 无障碍：焦点样式 ---------- */
/* 为键盘用户提供清晰的焦点指示器 */
*:focus-visible {
  outline: 2px solid var(--accent-glow);
  outline-offset: 2px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-glow);
  outline-offset: 3px;
  border-radius: 2px;
}

/* 移除鼠标点击时的焦点环（仅键盘导航显示） */
*:focus:not(:focus-visible) {
  outline: none;
}

/* 导航链接的键盘导航支持 */
.nav-link:focus-visible {
  background: rgba(58, 175, 228, 0.15);
  color: var(--white);
}

/* 下拉菜单键盘导航 */
.nav-dropdown a:focus-visible {
  background: rgba(58, 175, 228, 0.15);
  color: var(--white);
  outline-offset: -2px;
}

/* 按钮焦点增强 */
.btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(58, 175, 228, 0.4), 0 8px 24px rgba(29,111,164,0.5);
}

/* 表单元素焦点 */
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 0;
  box-shadow: 0 0 0 3px rgba(29, 111, 164, 0.25);
}

/* 卡片可交互元素的焦点 */
.service-card:focus-within,
.case-card:focus-within,
.news-card:focus-within {
  border-color: var(--accent-glow);
  box-shadow: 0 0 0 3px rgba(58, 175, 228, 0.3);
}

/* 跳过导航链接（屏幕阅读器用户） */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent);
  color: var(--white);
  padding: 8px 16px;
  z-index: 10000;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 0;
}

/* ---------- 通用布局 ---------- */
.container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: var(--section-pad); }

.section-header {
  text-align: center;
  margin-bottom: 72px;    /* 从 56px 增加到 72px */
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-glow);
  border: 1px solid var(--border-glow);
  border-radius: 20px;
  padding: 4px 14px;
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-title em {
  color: var(--accent-glow);
  font-style: normal;
}

.section-desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.75;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);  /* 使用渐变 */
  color: var(--white);
  border: 1px solid var(--accent-light);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(29,111,164,0.5);
}

.btn-primary:hover::before { opacity: 1; }

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

.btn-outline:hover {
  background: rgba(58,175,228,0.1);
  border-color: var(--accent-glow);
  color: var(--accent-glow);
  transform: translateY(-2px);
}

.btn-gold {
  background: var(--gradient-gold);  /* 使用渐变 */
  color: var(--primary-dark);
  border: 1px solid var(--gold-light);
}

.btn-gold:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(240,165,0,0.4);
}

/* ---------- 顶部通知条 ---------- */
.topbar {
  background: var(--primary-dark);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  font-size: 12px;
  color: var(--text-muted);
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.topbar a:hover { color: var(--accent-glow); }

.topbar-contact { display: flex; gap: 20px; align-items: center; }
.topbar-contact span { display: flex; align-items: center; gap: 6px; }

/* ---------- 导航栏 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(10,22,40,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

.navbar.scrolled {
  box-shadow: 0 2px 24px rgba(0,0,0,0.5);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
}

/* Logo */
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -1px;
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 50%;
  background: rgba(255,255,255,0.12);
  border-radius: 8px 8px 0 0;
}

.logo-text { line-height: 1.2; }
.logo-text .name {
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.02em;
}
.logo-text .domain {
  font-size: 11px;
  color: var(--accent-glow);
  letter-spacing: 0.08em;
}

/* 主导航 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item { position: relative; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text-muted);
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--white);
  background: rgba(58,175,228,0.12);
}

.nav-link.active {
  color: var(--accent-glow);
}

/* 下拉菜单 */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-mid);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}

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

.nav-dropdown a {
  display: block;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--text-muted);
  border-radius: 6px;
  transition: all var(--transition);
}

.nav-dropdown a:hover {
  color: var(--white);
  background: rgba(58,175,228,0.12);
  padding-left: 18px;
}

/* 手机菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-light);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---------- Hero 区 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--primary-dark);
}

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

/* 科技网格背景 */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(29,111,164,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29,111,164,0.08) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* 光晕效果 */
.hero-glow {
  position: absolute;
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(29,111,164,0.22) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  pointer-events: none;
}

.hero-glow-2 {
  position: absolute;
  width: 500px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(58,175,228,0.12) 0%, transparent 70%);
  bottom: 0;
  left: 5%;
  pointer-events: none;
}

/* 浮动粒子 */
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--accent-glow);
  border-radius: 50%;
  opacity: 0.4;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% { transform: translateY(100vh) translateX(0); opacity: 0; }
  10% { opacity: 0.4; }
  90% { opacity: 0.4; }
  100% { transform: translateY(-100px) translateX(var(--drift, 30px)); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 120px 0 80px;
}

/* 装饰性浮动光晕 */
.hero-content::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, transparent 70%);
  top: -200px;
  left: -200px;
  pointer-events: none;
  z-index: 0;
  animation: float-glow 8s ease-in-out infinite;
}

@keyframes float-glow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.1); }
}

.hero-content .container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;  /* 不对称：文字侧略宽 */
  gap: 80px;                              /* 从 60px 增加到 80px */
  align-items: center;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--accent-glow);
  margin-bottom: 20px;
}

.hero-label::before {
  content: '';
  display: block;
  width: 28px;
  height: 1px;
  background: var(--accent-glow);
}

.hero-title {
  font-size: clamp(32px, 4.5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 20px;
}

.hero-title .highlight {
  color: var(--accent-glow);
  position: relative;
}

.hero-title .highlight::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0.6;
}

.hero-title .gold { color: var(--gold); }

.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat .num {
  font-size: 28px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  line-height: 1;
}

.hero-stat .num span {
  font-size: 18px;
  color: var(--accent-glow);
}

.hero-stat .label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: 0.04em;
}

/* Hero 右侧图形 */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card-stack {
  position: relative;
  width: 100%;
  max-width: 460px;
}

.hcard {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition);
}

.hcard::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(58,175,228,0.4), transparent);
}

.hcard:hover { transform: translateY(-4px); }

.hcard-main {
  box-shadow: var(--shadow-card);
  z-index: 2;
}

.hcard-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(29,111,164,0.2);
  border: 1px solid var(--border-glow);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 11px;
  color: var(--accent-glow);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.hcard-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-glow);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hcard-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.hcard-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.hcard-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.metric {
  text-align: center;
}

.metric .value {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent-glow);
  line-height: 1;
  margin-bottom: 4px;
}

.metric .unit {
  font-size: 11px;
  color: var(--text-muted);
}

/* 小卡片 */
.hcard-mini {
  position: absolute;
  padding: 14px 18px;
  min-width: 170px;
}

.hcard-mini-1 {
  top: -30px;
  right: -20px;
  animation: float-card 4s ease-in-out infinite;
}

.hcard-mini-2 {
  bottom: -30px;
  left: -20px;
  animation: float-card 4s ease-in-out infinite 2s;
}

@keyframes float-card {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hcard-mini .mini-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  margin-bottom: 8px;
}

.hcard-mini .mini-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 2px;
}

.hcard-mini .mini-val {
  font-size: 11px;
  color: var(--text-muted);
}

/* ---------- 数字跑动条 ---------- */
.stats-bar {
  background: var(--primary-mid);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 36px 0;
}

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

.stat-item {
  text-align: center;
  padding: 0 16px;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border);
}

.stat-num {
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-num .stat-suffix {
  font-size: 0.55em;
  color: var(--accent-glow);
  font-weight: 600;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ---------- 服务模块 ---------- */
.services { background: var(--primary); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;          /* 从 24px 增加到 32px */
}

.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;  /* 从 32px 28px 增加到 40px 32px */
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
  cursor: pointer;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.service-card:hover {
  background: var(--card-bg-hover);
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 56px;
  height: 56px;
  background: rgba(29,111,164,0.2);
  border: 1px solid var(--border-glow);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  transition: all var(--transition);
}

.service-card:hover .service-icon {
  background: var(--accent);
  border-color: var(--accent-light);
  transform: scale(1.08);
}

.service-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}

.service-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 20px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.service-tag {
  font-size: 11px;
  color: var(--accent-glow);
  background: rgba(58,175,228,0.1);
  border: 1px solid rgba(58,175,228,0.2);
  border-radius: 20px;
  padding: 3px 10px;
}

.service-arrow {
  position: absolute;
  bottom: 28px;
  right: 28px;
  width: 32px;
  height: 32px;
  background: transparent;
  border: 1px solid var(--border-glow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-muted);
  transition: all var(--transition);
}

.service-card:hover .service-arrow {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--white);
  transform: translate(2px, -2px);
}

/* ---------- 关于我们 ---------- */
.about { background: var(--primary-dark); }

.about .container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;  /* 不对称：视觉侧更宽 */
  gap: 80px;                            /* 从 72px 增加到 80px */
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-img-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--primary-mid);
  border: 1px solid var(--border);
}

.about-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 如无真实图片，使用CSS绘制科技图形 */
.about-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-mid);
  position: relative;
  overflow: hidden;
}

.about-hex-grid {
  position: absolute;
  inset: 0;
  opacity: 0.15;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='52'%3E%3Cpolygon points='30,0 60,15 60,37 30,52 0,37 0,15' fill='none' stroke='%232A8FD4' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 60px 52px;
}

.about-center-ring {
  position: relative;
  z-index: 1;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-center-ring::before {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.2;
  animation: ring-pulse 3s ease-in-out infinite;
}

@keyframes ring-pulse {
  0%, 100% { transform: scale(1); opacity: 0.2; }
  50% { transform: scale(1.3); opacity: 0.08; }
}

.about-center-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-glow);
  text-align: center;
  line-height: 1.3;
  position: relative;
  z-index: 1;
}

/* 悬浮信息卡 */
.about-badge {
  position: absolute;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  backdrop-filter: blur(8px);
}

.about-badge-1 { bottom: -20px; right: -20px; }
.about-badge-2 { top: -20px; left: -20px; }

.about-badge .badge-num {
  font-size: 24px;
  font-weight: 800;
  color: var(--accent-glow);
  line-height: 1;
}

.about-badge .badge-txt {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* 关于文字侧 */
.about-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-glow);
  border: 1px solid var(--border-glow);
  border-radius: 20px;
  padding: 4px 14px;
  margin-bottom: 16px;
}

.about-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.25;
  margin-bottom: 16px;
}

.about-title em { color: var(--accent-glow); font-style: normal; }

.about-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 28px;
}

.about-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
}

.about-list-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-light);
}

.about-list-item::before {
  content: '';
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  background: rgba(29,111,164,0.25);
  border: 1px solid var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
  position: relative;
}

.about-list-item-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
  font-size: 10px;
  color: #fff;
}

/* ---------- 特性亮点 ---------- */
.features { background: var(--primary); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;          /* 从 24px 增加到 32px */
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;  /* 从 28px 24px 增加到 36px 28px */
  text-align: center;
  transition: all var(--transition);
}

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

.feature-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  background: rgba(29,111,164,0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  font-size: 22px;
  transition: all var(--transition);
}

.feature-card:hover .feature-icon-wrap {
  background: var(--accent);
  transform: scale(1.12) rotate(5deg);
}

.feature-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ---------- 案例展示 ---------- */
.cases { background: var(--primary-dark); }

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;          /* 从 24px 增加到 32px */
}

.case-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  cursor: pointer;
}

.case-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.case-thumb {
  aspect-ratio: 16/9;
  background: var(--primary-mid);
  overflow: hidden;
  position: relative;
}

.case-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.case-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--accent);
  background: linear-gradient(135deg, var(--primary-mid) 0%, rgba(29,111,164,0.2) 100%);
}

.case-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(6,14,28,0.9) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 20px;
}

.case-card:hover .case-overlay { opacity: 1; }

.case-overlay-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}

.case-body { padding: 20px 22px; }

.case-cat {
  font-size: 11px;
  color: var(--accent-glow);
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.case-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
  line-height: 1.4;
}

.case-meta {
  font-size: 12px;
  color: var(--text-muted);
}

/* ---------- 新闻资讯 ---------- */
.news { background: var(--primary); }

.news-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;          /* 从 24px 增加到 32px */
}

.news-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  transition: all var(--transition);
}

.news-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.news-card.featured {
  grid-column: 1 / -1;
  flex-direction: row;
}

.news-card-thumb {
  flex-shrink: 0;
  width: 200px;
  background: var(--primary-mid);
  position: relative;
  overflow: hidden;
}

.news-card.featured .news-card-thumb { width: 380px; }

.news-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--accent);
  background: linear-gradient(135deg, var(--primary-mid) 0%, rgba(29,111,164,0.15) 100%);
  min-height: 160px;
}

.news-card.featured .news-thumb-placeholder { font-size: 40px; }

.news-body { padding: 22px 24px; flex: 1; display: flex; flex-direction: column; }

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.news-cat {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-glow);
  background: rgba(58,175,228,0.12);
  border-radius: 20px;
  padding: 2px 10px;
}

.news-date {
  font-size: 11px;
  color: var(--text-dim);
}

.news-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color var(--transition);
}

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

.news-card.featured .news-title { font-size: 18px; }

.news-excerpt {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 14px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-more {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-glow);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition);
  align-self: flex-start;
}

.news-card:hover .news-more { gap: 8px; }

/* ---------- 合作伙伴 ---------- */
.partners { background: var(--primary-dark); padding: 60px 0; }

.partners-title {
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 36px;
}

.partners-track-wrap {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.partners-track {
  display: flex;
  gap: 32px;
  animation: scroll-track 20s linear infinite;
  width: max-content;
}

@keyframes scroll-track {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.partners-track:hover { animation-play-state: paused; }

.partner-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  height: 56px;
  min-width: 140px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dim);
  transition: all var(--transition);
  white-space: nowrap;
}

.partner-logo:hover {
  border-color: var(--border-glow);
  color: var(--text-light);
}

/* ---------- CTA 行动召唤 ---------- */
.cta-section {
  background: linear-gradient(135deg, var(--accent) 0%, rgba(15,64,90,0.9) 100%);
  padding: var(--section-pad);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='40' height='40' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='20' cy='20' r='1' fill='rgba(255,255,255,0.06)'/%3E%3C/svg%3E");
  background-size: 40px 40px;
}

.cta-content { position: relative; z-index: 1; }

.cta-title {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.cta-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  max-width: 500px;
  margin: 0 auto 32px;
}

.cta-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--primary-dark);
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand { max-width: 280px; }

.footer-brand .logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-btn {
  width: 36px;
  height: 36px;
  background: rgba(29,111,164,0.15);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: var(--text-muted);
  transition: all var(--transition);
}

.social-btn:hover {
  background: var(--accent);
  border-color: var(--accent-light);
  color: var(--white);
  transform: translateY(-2px);
}

.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-links { display: flex; flex-direction: column; gap: 10px; }

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-links a::before {
  content: '';
  display: block;
  width: 4px;
  height: 4px;
  background: var(--text-dim);
  border-radius: 50%;
  transition: background var(--transition);
}

.footer-links a:hover {
  color: var(--accent-glow);
}

.footer-links a:hover::before { background: var(--accent-glow); }

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

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-contact-icon {
  font-size: 15px;
  flex-shrink: 0;
  margin-top: 1px;
  color: var(--accent-glow);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-copy {
  font-size: 12px;
  color: var(--text-dim);
}

.footer-copy a {
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-copy a:hover { color: var(--accent-glow); }

.footer-icp {
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-icp a { color: var(--text-dim); }
.footer-icp a:hover { color: var(--text-muted); }

/* ---------- 回顶按钮 ---------- */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--accent);
  border: 1px solid var(--accent-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--white);
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 99;
  box-shadow: 0 4px 14px rgba(29,111,164,0.5);
}

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

.back-top:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
}

/* ---------- 加载动画 ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }
.fade-up-delay-4 { transition-delay: 0.4s; }

/* ---------- 页面内部 Banner ---------- */
.page-banner {
  background: var(--primary-dark);
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(29,111,164,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29,111,164,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-banner .container { position: relative; z-index: 1; }

.page-banner-title {
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 10px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
}

.breadcrumb a { color: var(--text-muted); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent-glow); }
.breadcrumb .sep { color: var(--text-dim); }
.breadcrumb .current { color: var(--accent-glow); }

/* ---------- 内页通用 ---------- */
.inner-section { padding: var(--section-pad); background: var(--primary); }

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}

.contact-info-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
}

.contact-info-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 24px;
}

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

.contact-item {
  display: flex;
  gap: 14px;
}

.contact-item-icon {
  width: 42px;
  height: 42px;
  background: rgba(29,111,164,0.2);
  border: 1px solid var(--border-glow);
  border-radius: 10px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.contact-item-label {
  font-size: 11px;
  color: var(--text-dim);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.contact-item-value {
  font-size: 14px;
  color: var(--text-light);
  font-weight: 500;
}

/* 联系表单 */
.contact-form {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}

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

.form-row label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.form-row label .required {
  color: #E24B4A;
  margin-left: 3px;
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  background: rgba(15,32,64,0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 14px;
  font-size: 14px;
  color: var(--text-light);
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent-light);
  box-shadow: 0 0 0 3px rgba(29,111,164,0.2);
}

.form-row input::placeholder,
.form-row textarea::placeholder { color: var(--text-dim); }

.form-row textarea { min-height: 120px; resize: vertical; }

.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  :root { --section-pad: 60px 0; }

  .hero-content .container { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .hero-title { font-size: clamp(28px, 6vw, 40px); }

  .about .container { grid-template-columns: 1fr; }
  .about-visual { display: none; }

  .stats-bar .container { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2)::after { display: none; }

  .cases-grid { grid-template-columns: 1fr 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .news-card.featured { flex-direction: column; }
  .news-card.featured .news-card-thumb { width: 100%; height: 200px; }

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

@media (max-width: 640px) {
  /* 防止横向滚动 */
  html, body {
    overflow-x: hidden;
    width: 100%;
  }
  
  .container {
    padding: 0 16px;
    max-width: 100%;
  }
  
  /* 导航栏适配 */
  .navbar .container {
    height: 56px;
  }
  
  .logo-text .name {
    font-size: 14px;
  }
  
  .logo-text .domain {
    display: none;
  }
  
  /* 移动端菜单 - 使用 transform 控制显示隐藏 */
  .nav-menu {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-dark);
    padding: 24px 20px;
    display: flex;                /* 必须设置 flex 才能工作 */
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    overflow-y: auto;
    z-index: 998;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .nav-menu.open {
    transform: translateX(0) !important;  /* 强制覆盖默认隐藏 */
  }
  
  .nav-toggle {
    display: flex !important;     /* 强制显示汉堡按钮 */
    cursor: pointer;
    padding: 8px;
    z-index: 999;
  }
  
  /* 导航右侧操作区 - 移动端保持可见 */
  .navbar .container > div:last-child {
    display: flex !important;
    gap: 12px;
  }
  
  /* 免费咨询按钮 - 移动端调整大小 */
  .navbar .btn.btn-primary {
    padding: 8px 16px !important;
    font-size: 13px !important;
    white-space: nowrap;          /* 防止文字换行 */
  }
  
  .nav-link {
    width: 100%;
    padding: 14px 16px;           /* 增加点击区域 */
    font-size: 16px;              /* 稍大字体，更易读 */
    border-radius: 8px;
  }
  
  /* 下拉菜单移动端样式 */
  .nav-dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    background: rgba(255,255,255,0.05);
    border: none;
    border-radius: 8px;
    padding: 8px 0 8px 20px;
    margin-top: 4px;
    box-shadow: none;
  }
  
  .nav-dropdown a {
    padding: 10px 16px;
    font-size: 14px;
  }
  
  /* 网格布局适配 */
  .services-grid { grid-template-columns: 1fr; gap: 24px; }
  .features-grid { grid-template-columns: 1fr; gap: 24px; }
  .cases-grid { grid-template-columns: 1fr; gap: 24px; }
  .news-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .stats-bar .container { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  
  /* Hero 区域适配 */
  .hero-content {
    padding: 80px 0 60px;
  }
  
  .hero-content .container {
    grid-template-columns: 1fr;   /* 单列布局 */
    gap: 40px;
  }
  
  .hero-visual {
    display: none;                /* 隐藏右侧视觉卡片 */
  }
  
  .hero-title {
    font-size: 28px;
    line-height: 1.3;
  }
  
  .hero-desc {
    font-size: 14px;
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: stretch;         /* 按钮占满宽度 */
    gap: 12px;
  }
  
  .btn {
    justify-content: center;      /* 按钮文字居中 */
    padding: 14px 24px;           /* 增大点击区域 */
  }
  
  /* Section 间距缩小 */
  :root {
    --section-pad: 60px 0;
  }
  
  .section-header {
    margin-bottom: 40px;
  }
  
  /* 卡片内边距缩小 */
  .service-card,
  .feature-card,
  .case-card,
  .news-card {
    padding: 24px 20px;
  }
  
  /* 统计条适配 */
  .stat-item {
    padding: 12px 8px;
  }
  
  .stat-num {
    font-size: 24px;
  }
  
  .stat-label {
    font-size: 12px;
  }
  
  /* 隐藏顶部通知条 */
  .topbar { display: none; }
  
  /* 表单适配 */
  .form-row-2 { grid-template-columns: 1fr; }
  
  /* 隐藏装饰元素 */
  .hcard-mini { display: none; }
  
  /* 返回顶部按钮适配 */
  .back-top {
    bottom: 20px;
    right: 16px;
    width: 40px;
    height: 40px;
    font-size: 16px;
  }
}

/* ============================================
   Banner 轮播图样式
   ============================================ */

.banner-slider {
  position: relative;
  width: 100%;
  height: 380px;
  overflow: hidden;
  background: var(--primary-dark);
}

.banner-slider .slides {
  display: flex;
  height: 100%;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.banner-slider .slide {
  flex-shrink: 0;
  height: 100%;
  position: relative;
}

.banner-slider .slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner-slider .slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(10,22,40,0.2) 0%, rgba(10,22,40,0.6) 100%);
  pointer-events: none;
}

.banner-slider .slide-caption {
  position: absolute;
  bottom: 60px;
  left: 0;
  right: 0;
  text-align: center;
  z-index: 2;
  padding: 0 20px;
}

.banner-slider .slide-caption h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}

.banner-slider .slide-caption p {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  text-shadow: 0 1px 6px rgba(0,0,0,0.4);
}

/* 箭头 */
.banner-slider .slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(10,22,40,0.6);
  border: 1px solid rgba(255,255,255,0.15);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  backdrop-filter: blur(4px);
}

.banner-slider .slider-arrow:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.banner-slider .slider-arrow.prev { left: 24px; }
.banner-slider .slider-arrow.next { right: 24px; }

/* 指示器 */
.banner-slider .slider-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 10px;
}

.banner-slider .slider-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
  border: none;
  cursor: pointer;
  transition: all 0.3s;
  padding: 0;
}

.banner-slider .slider-dots .dot.active {
  background: var(--accent-glow);
  transform: scale(1.2);
}

/* 轮播图响应式 */
@media (max-width: 768px) {
  .banner-slider { height: 240px; }
  .banner-slider .slide-caption h2 { font-size: 20px; }
  .banner-slider .slide-caption p { font-size: 13px; }
  .banner-slider .slider-arrow { width: 34px; height: 34px; font-size: 14px; }
  .banner-slider .slider-arrow.prev { left: 10px; }
  .banner-slider .slider-arrow.next { right: 10px; }
}