/* ============================================
   科利捷智能 - 现代化机房工程官网
   主题：浅色玻璃态 · 科技蓝 · 多层阴影
   ============================================ */

/* ---------- CSS 变量（亮色玻璃态系统） ---------- */
:root {
  /* 背景层级 */
  --bg-page:        #eaf2f5;          /* 页面底色：微青灰白（加深一档） */
  --bg-elev:        #ffffff;          /* 卡片底色：纯白 */
  --bg-glass:       rgba(255, 255, 255, 0.68);   /* 玻璃态卡片 */
  --bg-glass-soft:  rgba(255, 255, 255, 0.48);   /* 更透的玻璃态 */
  --bg-card-solid:  #ffffff;          /* 实色白卡片 */

  /* 边框 */
  --border-soft:    rgba(15, 40, 60, 0.08);     /* 极淡分隔线 */
  --border-mid:     rgba(15, 40, 60, 0.12);     /* 中等边框 */
  --border-glow:    rgba(20, 125, 158, 0.30);     /* 青蓝光晕边框（logo 色） */
  --border-strong:  rgba(20, 125, 158, 0.46);     /* 强青蓝边 */

  /* 文字 */
  --text-primary:   #07242e;          /* 主文字：极深青黑 */
  --text-secondary: #3a4f63;          /* 次文字：青灰 */
  --text-tertiary:  #5d7086;          /* 三级文字 */
  --text-muted:     #74879c;          /* 浅色标签 */
  --text-onbrand:   #ffffff;          /* 主色按钮上的文字 */

  /* 品牌主色：源自公司 logo 的青蓝（Teal），加深一档 */
  --accent-blue:    #147d9e;          /* 主青蓝（logo 核心色·加深） */
  --accent-cyan:    #2a9ec2;          /* 亮青蓝（光斑/高亮·加深） */
  --accent-deep:    #0d6688;          /* 深青蓝（hover/渐变深端·加深） */
  --accent-mint:    #00c893;          /* 强调高亮（数据用） */

  /* 渐变（青蓝家族，去掉紫色） */
  --gradient-main:  linear-gradient(135deg, #0d6688 0%, #147d9e 100%);
  --gradient-cool:  linear-gradient(135deg, #2a9ec2 0%, #147d9e 100%);
  --gradient-warm:  linear-gradient(135deg, #0d6688 0%, #147d9e 50%, #2a9ec2 100%);
  --gradient-soft:  linear-gradient(135deg, rgba(20,125,158,0.12), rgba(13,102,136,0.08));
  --gradient-page:  linear-gradient(180deg, #edf4f7 0%, #deecf1 100%);

  /* 阴影（多层投射，玻璃态必备） */
  --shadow-xs:  0 1px 2px rgba(15, 23, 60, 0.04);
  --shadow-sm:  0 2px 6px rgba(15, 23, 60, 0.06);
  --shadow-md:  0 8px 24px rgba(15, 23, 60, 0.08);
  --shadow-lg:  0 20px 48px rgba(15, 23, 60, 0.10);
  --shadow-xl:  0 32px 64px rgba(15, 23, 60, 0.14);
  --shadow-glow-blue:   0 8px 32px rgba(20, 125, 158, 0.22);
  --shadow-glow-cyan:   0 8px 32px rgba(42, 158, 194, 0.20);
  --shadow-glass: 0 8px 32px rgba(15, 23, 60, 0.10), 0 2px 6px rgba(15, 23, 60, 0.04);

  /* 圆角 / 容器 */
  --radius-sm:  10px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --radius-xl:  32px;
  --container:  1280px;
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--gradient-page);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 全局：极淡蓝白网格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 125, 158, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 125, 158, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at top, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at top, #000 0%, transparent 70%);
}

/* 浮动光斑（蓝/紫/青柔光） */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(42, 158, 194, 0.18), transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(13, 102, 136, 0.14), transparent 45%),
    radial-gradient(circle at 50% 110%, rgba(20, 125, 158, 0.10), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

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

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

ul, ol {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

input, textarea, select {
  font: inherit;
  color: inherit;
}

/* ---------- 通用工具类 ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 110px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 72px;
}

.section-tag {
  display: inline-block;
  padding: 7px 18px;
  background: var(--gradient-soft);
  border: 1px solid var(--border-glow);
  border-radius: 100px;
  color: var(--accent-blue);
  font-size: 12.5px;
  letter-spacing: 1.2px;
  margin-bottom: 22px;
  font-weight: 600;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  background: linear-gradient(135deg, #07242e 0%, #3a4f63 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
  letter-spacing: 0.2px;
}

.btn-primary {
  background: var(--gradient-main);
  color: var(--text-onbrand);
  box-shadow: var(--shadow-glow-blue);
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.25) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(20, 125, 158, 0.35);
}

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

.btn-outline {
  background: var(--bg-glass);
  border: 1px solid var(--border-mid);
  color: var(--text-primary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-outline:hover {
  background: #ffffff;
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  padding: 8px 18px;
  font-size: 14px;
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  color: var(--accent-blue);
}

/* ---------- 导航栏 ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: var(--transition);
  background: transparent;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.78);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-soft);
  padding: 10px 0;
  box-shadow: var(--shadow-xs);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 20px;
}

.brand-logo-img {
  display: block;
  height: 34px;
  width: auto;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 2px 10px rgba(15, 23, 60, 0.08);
}

.nav-menu {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 6px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-soft);
  border-radius: 100px;
}

.nav-link {
  padding: 9px 18px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--accent-blue);
  background: rgba(20, 125, 158, 0.06);
}

.nav-link.active {
  color: #ffffff;
  background: var(--gradient-main);
  box-shadow: var(--shadow-glow-blue);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-blue);
  font-weight: 600;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-glass);
  border: 1px solid var(--border-mid);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

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

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 130px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.45;
  animation: float 22s ease-in-out infinite;
}

.hero-orb-1 {
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(42, 158, 194, 0.55) 0%, transparent 70%);
  top: -120px;
  right: -130px;
}

.hero-orb-2 {
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(13, 102, 136, 0.45) 0%, transparent 70%);
  bottom: -120px;
  left: -100px;
  animation-delay: -11s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%      { transform: translate(40px, -40px) scale(1.08); }
  66%      { transform: translate(-30px, 30px) scale(0.96); }
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glow);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: 28px;
  box-shadow: var(--shadow-xs);
}

.hero-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--accent-blue);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(20, 125, 158, 0.18);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(40px, 5.5vw, 68px);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -1.5px;
  color: var(--text-primary);
}

.hero-title-line {
  display: block;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 580px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 540px;
  padding: 24px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glass);
}

.hero-stat-num {
  font-size: 36px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 6px;
}

.hero-stat-label {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* Hero 右侧：3D 数据中心可视化 */
.hero-visual {
  position: relative;
  height: 480px;
  display: grid;
  place-items: center;
}

.hero-cube {
  position: relative;
  width: 360px;
  height: 360px;
  transform-style: preserve-3d;
  transform: rotateX(-20deg) rotateY(35deg);
  animation: rotate 25s linear infinite;
}

@keyframes rotate {
  from { transform: rotateX(-20deg) rotateY(35deg); }
  to   { transform: rotateX(-20deg) rotateY(395deg); }
}

.cube-face {
  position: absolute;
  width: 360px;
  height: 360px;
  border: 1px solid rgba(20, 125, 158, 0.22);
  background: linear-gradient(135deg, rgba(255,255,255,0.7) 0%, rgba(245,247,252,0.4) 100%);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(6, 1fr);
  gap: 2px;
  padding: 18px;
  box-shadow: var(--shadow-md);
}

.cube-face span {
  background: linear-gradient(135deg, rgba(42, 158, 194, 0.45), rgba(20, 125, 158, 0.18));
  border-radius: 3px;
  box-shadow: 0 1px 2px rgba(20, 125, 158, 0.18);
}

.cube-face-front  { transform: translateZ(180px); }
.cube-face-back   { transform: rotateY(180deg) translateZ(180px); }
.cube-face-right  { transform: rotateY(90deg) translateZ(180px); }
.cube-face-left   { transform: rotateY(-90deg) translateZ(180px); }
.cube-face-top    { transform: rotateX(90deg) translateZ(180px); }
.cube-face-bottom { transform: rotateX(-90deg) translateZ(180px); }

.hero-float-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-md);
  z-index: 5;
}

.hero-float-card-1 {
  top: 10%;
  left: 0;
  animation: bobble 6s ease-in-out infinite;
}

.hero-float-card-2 {
  bottom: 18%;
  right: 0;
  animation: bobble 6s ease-in-out -3s infinite;
}

.hero-float-card-3 {
  bottom: 5%;
  left: 10%;
  animation: bobble 6s ease-in-out -1.5s infinite;
}

@keyframes bobble {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

.float-icon {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--gradient-main);
  display: grid;
  place-items: center;
  font-size: 16px;
  color: #fff;
  box-shadow: var(--shadow-glow-blue);
}

.float-info {
  font-size: 12px;
  color: var(--text-tertiary);
}

.float-info strong {
  display: block;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 700;
  margin-top: 2px;
}

/* ---------- 服务领域 ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.service-card {
  position: relative;
  padding: 36px 28px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow-xs);
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-lg);
  background: rgba(255, 255, 255, 0.95);
}

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

.service-icon {
  width: 58px;
  height: 58px;
  border-radius: 14px;
  background: var(--gradient-soft);
  border: 1px solid var(--border-glow);
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  color: var(--accent-blue);
  font-size: 28px;
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: var(--gradient-main);
  color: #fff;
  transform: rotate(-8deg) scale(1.1);
  border-color: transparent;
  box-shadow: var(--shadow-glow-blue);
}

.service-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.service-desc {
  color: var(--text-secondary);
  font-size: 14.5px;
  line-height: 1.7;
  margin-bottom: 18px;
}

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

.service-tag {
  font-size: 12px;
  padding: 4px 10px;
  background: rgba(20, 125, 158, 0.08);
  border: 1px solid rgba(20, 125, 158, 0.16);
  border-radius: 6px;
  color: var(--accent-blue);
  font-weight: 500;
}

/* ---------- 机房类型标签云 ---------- */
.tags-wrap {
  position: relative;
  padding: 56px 36px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
}

.tags-wrap::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 0% 0%, rgba(42, 158, 194, 0.18), transparent 50%),
    radial-gradient(circle at 100% 100%, rgba(13, 102, 136, 0.16), transparent 50%);
  pointer-events: none;
}

.tags-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.tag-chip {
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--border-soft);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: default;
  box-shadow: var(--shadow-xs);
}

.tag-chip:hover {
  background: #ffffff;
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-cyan);
}

/* ---------- 流程 ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
}

.process-grid::before {
  content: "";
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--border-glow), var(--border-glow), transparent);
  z-index: 0;
}

.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.process-num {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--bg-elev);
  border: 2px solid var(--border-glow);
  display: grid;
  place-items: center;
  font-size: 28px;
  font-weight: 800;
  color: var(--accent-blue);
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.process-step:hover .process-num {
  background: var(--gradient-main);
  color: #fff;
  transform: scale(1.1);
  border-color: transparent;
  box-shadow: var(--shadow-glow-blue);
}

.process-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.process-desc {
  font-size: 13.5px;
  color: var(--text-tertiary);
  line-height: 1.6;
}

/* ---------- 优势 ---------- */
.advantages {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.advantage-card {
  padding: 36px 24px;
  text-align: center;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  box-shadow: var(--shadow-xs);
}

.advantage-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: #ffffff;
}

.advantage-num {
  display: inline-block;
  font-size: 56px;
  font-weight: 900;
  line-height: 1;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
  font-family: "Inter", sans-serif;
}

.advantage-card h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.advantage-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ---------- 案例 ---------- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.case-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-elev);
  border: 1px solid var(--border-soft);
  transition: var(--transition);
  cursor: pointer;
  box-shadow: var(--shadow-xs);
}

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

.case-image {
  height: 220px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #e5f1f5 0%, #d3e8ee 100%);
  display: grid;
  place-items: center;
}

.case-image::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 125, 158, 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 125, 158, 0.10) 1px, transparent 1px);
  background-size: 30px 30px;
}

.case-illust {
  position: relative;
  z-index: 1;
  font-size: 60px;
  color: var(--accent-blue);
  opacity: 0.55;
  transition: var(--transition);
  filter: drop-shadow(0 4px 12px rgba(20, 125, 158, 0.25));
}

.case-card:hover .case-illust {
  transform: scale(1.1);
  opacity: 0.9;
}

.case-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-glow);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-blue);
  z-index: 2;
}

.case-info {
  padding: 24px;
}

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

.case-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 14px;
  display: flex;
  gap: 16px;
}

.case-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.case-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- 合作伙伴 ---------- */
.partners {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.partner-cell {
  height: 92px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  color: var(--text-tertiary);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-xs);
}

.partner-cell:hover {
  color: var(--accent-blue);
  border-color: var(--border-glow);
  transform: translateY(-2px);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

/* ---------- CTA 区块 ---------- */
.cta-section {
  padding: 80px 0;
  position: relative;
  z-index: 1;
}

.cta-box {
  padding: 64px 48px;
  background: linear-gradient(135deg, #e8f4f8 0%, #dbeef3 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(42, 158, 194, 0.25), transparent 60%),
    radial-gradient(circle at 0% 100%, rgba(13, 102, 136, 0.15), transparent 50%);
  pointer-events: none;
}

.cta-box h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  margin-bottom: 16px;
  position: relative;
  color: var(--text-primary);
}

.cta-box p {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  position: relative;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

/* ---------- 页脚 ---------- */
.footer {
  padding: 64px 0 32px;
  background: linear-gradient(180deg, rgba(255,255,255,0.6) 0%, rgba(245,247,252,1) 100%);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-soft);
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer h5 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer p, .footer li {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-bottom: 10px;
  line-height: 1.7;
}

.footer li a {
  color: var(--text-tertiary);
}

.footer li a:hover {
  color: var(--accent-blue);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-contact {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-contact-icon {
  color: var(--accent-blue);
  flex-shrink: 0;
  margin-top: 3px;
}

/* ---------- 浮动联系按钮 ---------- */
.float-buttons {
  position: fixed;
  right: 24px;
  bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 50;
}

.float-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-soft);
  display: grid;
  place-items: center;
  color: var(--accent-blue);
  font-size: 22px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  position: relative;
}

.float-btn:hover {
  background: var(--gradient-main);
  color: #fff;
  transform: scale(1.08);
  border-color: transparent;
  box-shadow: var(--shadow-glow-blue);
}

.float-btn-primary {
  background: var(--gradient-main);
  color: #fff;
  border-color: transparent;
  animation: glowPulse 2.4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(20, 125, 158, 0.45), var(--shadow-md); }
  50%      { box-shadow: 0 0 0 16px rgba(20, 125, 158, 0), var(--shadow-md); }
}

.float-btn-tip {
  position: absolute;
  right: 70px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(10, 14, 39, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.float-btn:hover .float-btn-tip {
  opacity: 1;
  transform: translateY(-50%) translateX(-4px);
}

/* ---------- 滚动渐入动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

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

/* ---------- 页面 Hero（子页面共用）---------- */
.page-hero {
  padding: 200px 0 96px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(42, 158, 194, 0.28), transparent 60%),
    radial-gradient(circle at 80% 50%, rgba(13, 102, 136, 0.18), transparent 60%);
  pointer-events: none;
}

.page-hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  margin-bottom: 16px;
  position: relative;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.page-hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 24px;
  position: relative;
}

.breadcrumb a:hover {
  color: var(--accent-blue);
}

/* ---------- 子页面通用 ---------- */
.content-block {
  padding: 80px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.3;
  color: var(--text-primary);
}

.about-text p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-visual {
  position: relative;
  height: 460px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  display: grid;
  place-items: center;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 125, 158, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 125, 158, 0.08) 1px, transparent 1px);
  background-size: 30px 30px;
}

.about-visual-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.about-visual-content .big-num {
  font-size: 96px;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.about-visual-content .big-label {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 12px;
}

/* 服务详情页 */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.service-detail-card {
  padding: 40px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  box-shadow: var(--shadow-xs);
}

.service-detail-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.9);
}

.service-detail-card .service-icon {
  width: 64px;
  height: 64px;
  font-size: 30px;
  margin-bottom: 24px;
}

.service-detail-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.service-detail-card p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 20px;
  line-height: 1.7;
}

.feature-list {
  display: grid;
  gap: 10px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-secondary);
}

.feature-item::before {
  content: "✓";
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gradient-soft);
  border: 1px solid var(--border-glow);
  color: var(--accent-blue);
  display: grid;
  place-items: center;
  font-size: 12px;
  flex-shrink: 0;
  font-weight: 800;
}

/* 案例筛选 */
.case-filters {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.case-filter {
  padding: 10px 22px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-soft);
  border-radius: 100px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-xs);
}

.case-filter.active, .case-filter:hover {
  background: var(--gradient-main);
  border-color: transparent;
  color: #fff;
  box-shadow: var(--shadow-glow-blue);
}

/* 联系页 */
.contact-grid {
  display: grid;
  gap: 48px;
  align-items: start;
}

.contact-info-card {
  padding: 32px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
}

.contact-info-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-soft);
}

.contact-item:last-child {
  border-bottom: none;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--gradient-soft);
  border: 1px solid var(--border-glow);
  display: grid;
  place-items: center;
  color: var(--accent-blue);
  font-size: 18px;
  flex-shrink: 0;
}

.contact-item-label {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

.contact-item-value {
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.5;
}

.contact-form {
  padding: 40px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
}

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

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

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-input, .form-textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 15px;
  transition: var(--transition);
}

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

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(20, 125, 158, 0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  font-family: inherit;
}

.form-submit {
  width: 100%;
  padding: 16px;
  background: var(--gradient-main);
  border: none;
  border-radius: 10px;
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-glow-blue);
}

.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(20, 125, 158, 0.35);
}

/* 关于页 - 时间线 */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-blue), var(--accent-deep));
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-elev);
  border: 3px solid var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(20, 125, 158, 0.18);
}

.timeline-year {
  font-size: 18px;
  font-weight: 800;
  color: var(--accent-blue);
  margin-bottom: 6px;
}

.timeline-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.timeline-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 关于页 - 资质卡片 */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.cert-card {
  padding: 36px 24px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-xs);
}

.cert-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: #ffffff;
}

.cert-icon {
  font-size: 40px;
  margin-bottom: 16px;
  color: var(--accent-blue);
}

.cert-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.cert-card p {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 60px; }
  .hero-visual { height: 380px; }
  .hero-cube { width: 280px; height: 280px; }
  .cube-face { width: 280px; height: 280px; }
  .cube-face-front  { transform: translateZ(140px); }
  .cube-face-back   { transform: rotateY(180deg) translateZ(140px); }
  .cube-face-right  { transform: rotateY(90deg) translateZ(140px); }
  .cube-face-left   { transform: rotateY(-90deg) translateZ(140px); }
  .cube-face-top    { transform: rotateX(90deg) translateZ(140px); }
  .cube-face-bottom { transform: rotateX(-90deg) translateZ(140px); }

  .footer-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .process-grid::before { display: none; }
  .about-grid, .service-detail, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .partners { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }

  .nav-menu {
    position: fixed;
    top: 70px;
    right: 0;
    bottom: 0;
    width: 280px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(255, 255, 255, 0.92);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    border-left: 1px solid var(--border-soft);
    padding: 24px;
    transform: translateX(100%);
    transition: var(--transition);
    gap: 4px;
    border-radius: 0;
  }
  .nav-menu.open { transform: translateX(0); }
  .nav-menu .nav-link {
    display: block;
    padding: 14px 16px;
    font-size: 15px;
    border-radius: 10px;
  }
  .nav-phone { display: none; }
  .nav-toggle { display: flex; }
  .nav-cta { gap: 8px; }

  .hero { padding: 110px 0 60px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .hero-stat-num { font-size: 26px; }

  .services-grid { grid-template-columns: 1fr; }
  .advantages { grid-template-columns: 1fr 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .partners { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
  .cta-box { padding: 40px 24px; }

  .float-buttons { right: 16px; bottom: 20px; }
  .float-btn { width: 48px; height: 48px; font-size: 18px; }

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

/* ============================================
   低内核浏览器精简模式
   触发：百度 APP / 手百内置浏览器、X5 内核、旧版 Chrome / WebView
   策略：关闭持续动画 / 关闭 backdrop-filter / 简化大模糊 / 关闭 smooth scroll
   现代浏览器（Chrome 70+ / Safari 12+ / 微信新版内核）不受影响
   ============================================ */
html.lite-mode,
html.lite-mode * {
  /* 关闭所有持续动画与过渡：滚动时不再触发重绘重排 */
  animation: none !important;
  transition: none !important;
}

html.lite-mode html {
  scroll-behavior: auto !important;
}

/* 关闭全局网格 + radial-gradient + mask-image 三层 fixed 背景 */
html.lite-mode body::before,
html.lite-mode body::after {
  display: none !important;
}

/* 关闭 Hero 区大模糊光斑（filter:blur(100px) 在低内核下走 CPU，滚动极卡） */
html.lite-mode .hero-orb {
  display: none !important;
}

/* 3D 立方体：保留静态外观、停止持续旋转（216 个 span 持续重绘是元凶之一） */
html.lite-mode .hero-cube {
  animation: none !important;
  transform: rotateX(-15deg) rotateY(25deg);
}
html.lite-mode .hero-cube .cube-face {
  -webkit-backdrop-filter: none !important;
  backdrop-filter: none !important;
  background: rgba(245, 247, 252, 0.92) !important;
}

/* 浮动卡片停止 bobble 动画 */
html.lite-mode .hero-float-card {
  animation: none !important;
}

/* 关闭所有 backdrop-filter：低内核渲染该属性需重算背后整层快照，开销极大 */
html.lite-mode .nav.scrolled,
html.lite-mode .nav-menu,
html.lite-mode .btn-outline,
html.lite-mode .hero-badge,
html.lite-mode .hero-stats,
html.lite-mode .service-card,
html.lite-mode .tags-wrap,
html.lite-mode .advantage-card,
html.lite-mode .partner-cell,
html.lite-mode .case-tag,
html.lite-mode .hero-float-card,
html.lite-mode .contact-info-card,
html.lite-mode .contact-form,
html.lite-mode .cert-card,
html.lite-mode .float-btn,
html.lite-mode .float-btn-tip,
html.lite-mode .about-visual,
html.lite-mode .service-detail-card,
html.lite-mode .case-filter {
  -webkit-backdrop-filter: none !important;
  backdrop-filter: none !important;
}

/* 给玻璃态元素提供静态纯色兜底，避免变透明导致文字看不清 */
html.lite-mode .nav.scrolled       { background: #ffffff !important; }
html.lite-mode .nav-menu           { background: #ffffff !important; }
html.lite-mode .btn-outline        { background: #ffffff !important; }
html.lite-mode .hero-badge         { background: rgba(232, 244, 248, 0.95) !important; }
html.lite-mode .hero-stats         { background: #ffffff !important; }
html.lite-mode .service-card       { background: #ffffff !important; }
html.lite-mode .tags-wrap          { background: #ffffff !important; }
html.lite-mode .advantage-card     { background: #ffffff !important; }
html.lite-mode .partner-cell       { background: #ffffff !important; }
html.lite-mode .case-tag           { background: #ffffff !important; }
html.lite-mode .hero-float-card    { background: #ffffff !important; }
html.lite-mode .contact-info-card  { background: #ffffff !important; }
html.lite-mode .contact-form       { background: #ffffff !important; }
html.lite-mode .cert-card          { background: #ffffff !important; }
html.lite-mode .float-btn          { background: #ffffff !important; }
html.lite-mode .float-btn-tip      { background: rgba(10, 14, 39, 0.95) !important; }
html.lite-mode .about-visual       { background: #ffffff !important; }
html.lite-mode .service-detail-card{ background: #ffffff !important; }
html.lite-mode .case-filter        { background: #ffffff !important; }

/* 主按钮的 ::after 高光在低内核下每帧重绘成本高，直接关掉 */
html.lite-mode .btn-primary::after {
  display: none !important;
}

/* 浮动按钮关闭 glowPulse（box-shadow 动画每帧重绘） */
html.lite-mode .float-btn-primary {
  animation: none !important;
  box-shadow: var(--shadow-md) !important;
}

/* 关键：滚动事件切换的 .nav.scrolled 类不再启用 backdrop-filter，
   已在上面一并覆盖 */

/* reveal 动画直接显示终态（避免 IntersectionObserver 在低内核下的微抖动） */
html.lite-mode .reveal {
  opacity: 1 !important;
  transform: none !important;
}

/* 关闭文本背景渐变（-webkit-background-clip:text 在低内核下渲染开销高） */
html.lite-mode .section-title,
html.lite-mode .text-gradient,
html.lite-mode .hero-stat-num,
html.lite-mode .advantage-num,
html.lite-mode .about-visual-content .big-num {
  -webkit-text-fill-color: var(--text-primary) !important;
  color: var(--text-primary) !important;
  background: none !important;
  -webkit-background-clip: initial !important;
  background-clip: initial !important;
}
html.lite-mode .text-gradient,
html.lite-mode .hero-stat-num,
html.lite-mode .advantage-num,
html.lite-mode .about-visual-content .big-num {
  color: var(--accent-blue) !important;
}