/**
 * ============================================================
 * 南昌企腾信息科技有限公司 - 企业官网模板主题样式
 * ============================================================
 * 【骰子设计属性声明】
 * 维度1(D12=7): 便当盒网格 - Bento Box Grid, 不规则子网格组合
 * 维度2(D8=1):  置顶吸附导航 - sticky-top, 滚动缩小+阴影
 * 维度3(D30=16,19,24,29): 物理产品展示/数据解密/时间胶囊/3D卡片倾斜
 * 维度4(D8=1):  极端对比排版 - clamp()响应, 8-10倍字号差
 * 维度5(D8=2):  弹性果冻交互 - cubic-bezier(0.68,-0.55,0.265,1.55)
 * 维度6(D8=4):  工业金属质感 - 渐变反光边框
 * 维度7(D8=6):  模块化迷宫留白 - 独立container错落
 * 维度8(D8=2):  滚动渐进动效 - IntersectionObserver, threshold:0.2
 * 彩蛋(E1):     终端打字机 - Hero模拟命令行输入(首屏装饰,文字终态静态)
 * ============================================================
 * 主题: 企腾科技 (Qiteng Tech)
 * 主色: 深海蓝 #1976D2 | 辅色: 清新薄荷 #00BFA5 | 强调: 琥珀橙 #FF6F00
 * ============================================================
 */

/* ================== CSS主题变量根定义 ================== */
:root {
  --qt-primary: #1976D2;
  --qt-primary-dark: #0D47A1;
  --qt-primary-light: #64B5F6;
  --qt-secondary: #00BFA5;
  --qt-secondary-light: #64FFDA;
  --qt-accent: #FF6F00;
  --qt-accent-light: #FFA726;
  --qt-text: #263238;
  --qt-text-secondary: #546E7A;
  --qt-text-muted: #78909C;
  --qt-bg: #F5F7FA;
  --qt-bg-warm: #FAFBFC;
  --qt-surface: #FFFFFF;
  --qt-border: #E0E6ED;
  --qt-border-light: #ECEFF1;
  --qt-footer-bg: #0D47A1;
  --qt-footer-text: rgba(255,255,255,0.85);
  --qt-metal-start: #f0f4f8;
  --qt-metal-end: #d9e2ec;
  --qt-glass: rgba(255,255,255,0.92);
  --qt-shadow-sm: 0 2px 8px rgba(13,71,161,0.08);
  --qt-shadow-md: 0 8px 32px rgba(13,71,161,0.12);
  --qt-shadow-lg: 0 16px 48px rgba(13,71,161,0.16);
  --qt-shadow-metal: inset 0 1px 0 rgba(255,255,255,0.6), 0 4px 16px rgba(25,118,210,0.15);
  --qt-transition-jelly: all 0.45s cubic-bezier(0.68,-0.55,0.265,1.55);
  --qt-transition-smooth: all 0.3s ease;
  --qt-radius: 16px;
  --qt-radius-sm: 8px;
  --qt-radius-lg: 24px;
  --qt-max-width: 1400px;
  --qt-section-gap: 8vh;
  --qt-container-gap: 3rem;
}

/* ================== 基础重置与排版暴力 ================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--qt-text);
  background: var(--qt-bg);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 极端对比排版: 8-10倍字号差 */
h1, .qt-h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem); font-weight: 800; line-height: 1.15; letter-spacing: -0.02em; }
h2, .qt-h2 { font-size: clamp(1.75rem, 3vw + 0.5rem, 3rem); font-weight: 700; line-height: 1.25; }
h3, .qt-h3 { font-size: clamp(1.25rem, 2vw + 0.25rem, 1.75rem); font-weight: 600; line-height: 1.35; }
h4, .qt-h4 { font-size: clamp(1rem, 1.5vw + 0.25rem, 1.25rem); font-weight: 600; }
.qt-lead { font-size: clamp(1.125rem, 1.5vw, 1.375rem); color: var(--qt-text-secondary); line-height: 1.7; }
.qt-caption { font-size: 0.875rem; color: var(--qt-text-muted); }
.qt-mega-text { font-size: clamp(3rem, 8vw, 7rem); font-weight: 900; line-height: 1; letter-spacing: -0.04em; }

a { color: var(--qt-primary); text-decoration: none; transition: var(--qt-transition-smooth); }
a:hover { color: var(--qt-primary-dark); }
img { max-width: 100%; height: auto; display: block; }

/* ================== 工业金属质感 ================== */
.qt-metal-card {
  background: linear-gradient(135deg, var(--qt-metal-start) 0%, var(--qt-surface) 50%, var(--qt-metal-end) 100%);
  border: 1px solid var(--qt-border);
  box-shadow: var(--qt-shadow-metal);
  position: relative;
  overflow: hidden;
}
.qt-metal-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(135deg, var(--qt-primary-light), var(--qt-secondary), var(--qt-primary-light));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.35;
  pointer-events: none;
}

/* ================== 置顶吸附导航 ================== */
.qt-navbar {
  background: var(--qt-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--qt-border-light);
  transition: var(--qt-transition-jelly);
  z-index: 1040;
}
.qt-navbar.is-scrolled {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  box-shadow: var(--qt-shadow-md);
}
.qt-navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.5rem;
  color: var(--qt-primary-dark);
  letter-spacing: -0.02em;
}
.qt-navbar-brand img { height: 42px; width: auto; }
.qt-nav-link {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--qt-text) !important;
  padding: 0.5rem 1rem !important;
  border-radius: var(--qt-radius-sm);
  position: relative;
  transition: var(--qt-transition-jelly);
}
.qt-nav-link:hover, .qt-nav-link.active {
  color: var(--qt-primary) !important;
  background: rgba(25,118,210,0.06);
}
.qt-nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 1rem;
  right: 1rem;
  height: 3px;
  background: var(--qt-primary);
  border-radius: 2px;
}
.qt-nav-cta {
  background: var(--qt-accent);
  color: #fff !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.875rem;
  box-shadow: 0 4px 14px rgba(255,111,0,0.3);
  transition: var(--qt-transition-jelly);
}
.qt-nav-cta:hover {
  background: #E65100;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,111,0,0.4);
}

/* 汉堡菜单 */
.qt-navbar-toggler {
  border: none;
  padding: 0.5rem;
  border-radius: var(--qt-radius-sm);
  background: rgba(25,118,210,0.08);
}
.qt-navbar-toggler:focus { box-shadow: none; }
.qt-navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2813,71,161,1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.5' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ================== Hero 终端打字机特效 ================== */
.qt-hero-terminal {
  background: linear-gradient(160deg, var(--qt-primary-dark) 0%, #0a2540 60%, #051524 100%);
  position: relative;
  overflow: hidden;
  min-height: 85vh;
  display: flex;
  align-items: center;
}
.qt-hero-terminal::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(25,118,210,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 80%, rgba(0,191,165,0.1) 0%, transparent 50%);
  pointer-events: none;
}
.qt-hero-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.qt-terminal-box {
  background: rgba(10,25,50,0.7);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(100,181,246,0.2);
  border-radius: var(--qt-radius);
  padding: 2rem;
  position: relative;
  overflow: hidden;
}
.qt-terminal-box::before {
  content: "● ● ●";
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.5rem;
  color: rgba(255,255,255,0.4);
  margin-bottom: 1rem;
}
.qt-terminal-text {
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  color: var(--qt-secondary-light);
  font-size: clamp(0.875rem, 1.5vw, 1.125rem);
  line-height: 1.8;
}
.qt-terminal-cursor {
  display: inline-block;
  width: 10px;
  height: 1.2em;
  background: var(--qt-secondary-light);
  vertical-align: text-bottom;
  animation: qtCursorBlink 1s step-end infinite;
  margin-left: 2px;
}
@keyframes qtCursorBlink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

.qt-hero-title {
  color: #fff;
  font-weight: 900;
  text-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.qt-hero-desc {
  color: rgba(255,255,255,0.85);
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  max-width: 560px;
}
.qt-hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--qt-accent);
  color: #fff;
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  border: none;
  box-shadow: 0 8px 24px rgba(255,111,0,0.35);
  transition: var(--qt-transition-jelly);
}
.qt-hero-cta:hover {
  background: #E65100;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 32px rgba(255,111,0,0.45);
  color: #fff;
}

/* 轮播图规范 */
.qt-carousel-hero .carousel-item { min-height: 85vh; }
.qt-carousel-hero .carousel-item img {
  object-fit: cover;
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}
.qt-carousel-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13,71,161,0.85) 0%, rgba(13,71,161,0.4) 50%, rgba(13,71,161,0.1) 100%);
}
.qt-carousel-caption {
  position: relative;
  z-index: 2;
  text-align: left;
  left: 0;
  right: auto;
  bottom: auto;
  top: 50%;
  transform: translateY(-50%);
  padding: 0 2rem;
}

/* ================== Bento 便当盒网格 ================== */
.qt-bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  max-width: var(--qt-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.qt-bento-item {
  background: var(--qt-surface);
  border-radius: var(--qt-radius-lg);
  border: 1px solid var(--qt-border);
  overflow: hidden;
  transition: var(--qt-transition-jelly);
  position: relative;
}
.qt-bento-item:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--qt-shadow-lg);
  border-color: var(--qt-primary-light);
}
.qt-bento-item.col-2 { grid-column: span 2; }
.qt-bento-item.col-2-row-2 { grid-column: span 2; grid-row: span 2; }
.qt-bento-item.col-1-row-2 { grid-row: span 2; }

/* ================== 3D卡片倾斜 (模块29) ================== */
.qt-tilt-card {
  transform-style: preserve-3d;
  perspective: 1000px;
  transition: transform 0.1s ease-out;
}
.qt-tilt-card-inner {
  transition: var(--qt-transition-jelly);
  transform-style: preserve-3d;
}
.qt-tilt-card:hover .qt-tilt-card-inner {
  box-shadow: var(--qt-shadow-lg);
}

/* ================== 数据解密计数器 (模块19) ================== */
.qt-stat-number {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  color: var(--qt-primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.qt-stat-label {
  font-size: 0.9375rem;
  color: var(--qt-text-secondary);
  margin-top: 0.5rem;
  font-weight: 500;
}

/* ================== 时间胶囊螺旋时间轴 (模块24) ================== */
.qt-timeline-capsule {
  position: relative;
  padding-left: 2rem;
}
.qt-timeline-capsule::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--qt-primary) 0%, var(--qt-secondary) 100%);
  border-radius: 3px;
}
.qt-timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
  padding-left: 1.5rem;
}
.qt-timeline-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  background: var(--qt-surface);
  border: 3px solid var(--qt-primary);
  border-radius: 50%;
  transform: translateX(-4.5px);
}
.qt-timeline-year {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--qt-primary);
  margin-bottom: 0.25rem;
  display: inline-block;
  padding: 0.125rem 0.5rem;
  background: rgba(25,118,210,0.08);
  border-radius: 4px;
}

/* ================== 滚动渐进动效 (维度8) ================== */
.qt-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22,1,0.36,1);
}
.qt-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.qt-reveal-delay-1 { transition-delay: 0.1s; }
.qt-reveal-delay-2 { transition-delay: 0.2s; }
.qt-reveal-delay-3 { transition-delay: 0.3s; }
.qt-reveal-delay-4 { transition-delay: 0.4s; }

/* ================== 弹性果冻动画 (维度5) ================== */
.qt-jelly-hover:hover {
  animation: qtJelly 0.5s var(--qt-transition-jelly);
}
@keyframes qtJelly {
  0% { transform: scale(1); }
  30% { transform: scale(1.08, 0.92); }
  50% { transform: scale(0.96, 1.04); }
  70% { transform: scale(1.02, 0.98); }
  100% { transform: scale(1); }
}

/* ================== 业务卡片 ================== */
.qt-service-card {
  background: var(--qt-surface);
  border-radius: var(--qt-radius);
  border: 1px solid var(--qt-border);
  padding: 2rem;
  height: 100%;
  transition: var(--qt-transition-jelly);
  position: relative;
  overflow: hidden;
}
.qt-service-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, var(--qt-primary-light) 0%, transparent 70%);
  opacity: 0.1;
  border-radius: 0 0 0 100%;
  transition: opacity 0.3s;
}
.qt-service-card:hover::after { opacity: 0.2; }
.qt-service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--qt-shadow-lg);
  border-color: var(--qt-primary-light);
}
.qt-service-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--qt-primary) 0%, var(--qt-primary-dark) 100%);
  color: #fff;
  border-radius: var(--qt-radius-sm);
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 8px 20px rgba(25,118,210,0.25);
}
.qt-service-icon.accent {
  background: linear-gradient(135deg, var(--qt-accent) 0%, #E65100 100%);
  box-shadow: 0 8px 20px rgba(255,111,0,0.25);
}
.qt-service-icon.secondary {
  background: linear-gradient(135deg, var(--qt-secondary) 0%, #009688 100%);
  box-shadow: 0 8px 20px rgba(0,191,165,0.25);
}

/* ================== 城市目录模块 ================== */
.qt-city-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.75rem;
}
.qt-city-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.25rem;
  background: var(--qt-surface);
  border: 1px solid var(--qt-border);
  border-radius: var(--qt-radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--qt-text);
  transition: var(--qt-transition-jelly);
  white-space: nowrap;
}
.qt-city-chip:hover {
  background: var(--qt-primary);
  color: #fff;
  border-color: var(--qt-primary);
  transform: translateY(-2px);
  box-shadow: var(--qt-shadow-sm);
}

/* ================== 物理产品展示模块 (模块16简化版) ================== */
.qt-product-showcase {
  position: relative;
  perspective: 1200px;
}
.qt-product-showcase-inner {
  transition: transform 0.4s ease-out;
  transform-style: preserve-3d;
}

/* ================== 文章卡片 ================== */
.qt-article-card {
  background: var(--qt-surface);
  border-radius: var(--qt-radius);
  border: 1px solid var(--qt-border);
  overflow: hidden;
  transition: var(--qt-transition-jelly);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.qt-article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--qt-shadow-md);
  border-color: var(--qt-primary-light);
}
.qt-article-card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.qt-article-card:hover .qt-article-card-img { transform: scale(1.06); }
.qt-article-card-body { padding: 1.25rem; flex: 1; display: flex; flex-direction: column; }
.qt-article-card-title {
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.qt-article-card-meta {
  font-size: 0.8125rem;
  color: var(--qt-text-muted);
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ================== 内容详情正文样式 ================== */
.qt-content-body {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--qt-text);
}
.qt-content-body h2 { margin-top: 2.5rem; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--qt-border); }
.qt-content-body h3 { margin-top: 2rem; margin-bottom: 0.75rem; color: var(--qt-primary-dark); }
.qt-content-body img { border-radius: var(--qt-radius-sm); margin: 1.5rem 0; box-shadow: var(--qt-shadow-sm); }
.qt-content-body p { margin-bottom: 1.25rem; }
.qt-content-body ul, .qt-content-body ol { margin-bottom: 1.25rem; padding-left: 1.5rem; }
.qt-content-body li { margin-bottom: 0.5rem; }
.qt-content-body blockquote {
  border-left: 4px solid var(--qt-primary);
  background: var(--qt-bg-warm);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--qt-radius-sm) var(--qt-radius-sm) 0;
  font-style: italic;
  color: var(--qt-text-secondary);
}

/* ================== 表单样式 ================== */
.qt-form-control {
  border: 1.5px solid var(--qt-border);
  border-radius: var(--qt-radius-sm);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  transition: var(--qt-transition-jelly);
  background: var(--qt-surface);
}
.qt-form-control:focus {
  border-color: var(--qt-primary);
  box-shadow: 0 0 0 4px rgba(25,118,210,0.1);
  outline: none;
}
.qt-form-control.is-error {
  border-color: var(--qt-accent);
  animation: qtShake 0.4s ease-in-out;
}
@keyframes qtShake {
  0%,100% { transform: translateX(0); }
  20%,60% { transform: translateX(-6px); }
  40%,80% { transform: translateX(6px); }
}
.qt-btn-primary {
  background: linear-gradient(135deg, var(--qt-primary) 0%, var(--qt-primary-dark) 100%);
  color: #fff;
  border: none;
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 8px 24px rgba(25,118,210,0.3);
  transition: var(--qt-transition-jelly);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.qt-btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(25,118,210,0.4);
  color: #fff;
}
.qt-btn-accent {
  background: linear-gradient(135deg, var(--qt-accent) 0%, #E65100 100%);
  color: #fff;
  border: none;
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(255,111,0,0.3);
  transition: var(--qt-transition-jelly);
}
.qt-btn-accent:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(255,111,0,0.4);
  color: #fff;
}

/* ================== 页脚 ================== */
.qt-footer {
  background: var(--qt-footer-bg);
  color: var(--qt-footer-text);
  padding-top: 5rem;
  padding-bottom: 2rem;
  position: relative;
  overflow: hidden;
}
.qt-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--qt-primary), var(--qt-secondary), var(--qt-accent));
}
.qt-footer a { color: rgba(255,255,255,0.75); }
.qt-footer a:hover { color: #fff; }
.qt-footer-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}
.qt-footer-title::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--qt-secondary);
  border-radius: 2px;
}
.qt-footer-link {
  display: block;
  padding: 0.375rem 0;
  font-size: 0.9375rem;
  transition: var(--qt-transition-smooth);
}
.qt-footer-link:hover { padding-left: 4px; }
.qt-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 3rem;
  padding-top: 2rem;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
}

/* ================== 页面通用模块 ================== */
.qt-section {
  padding-top: var(--qt-section-gap);
  padding-bottom: var(--qt-section-gap);
  position: relative;
}
.qt-section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
}
.qt-section-label {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: rgba(25,118,210,0.08);
  color: var(--qt-primary);
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
.qt-section-label.accent {
  background: rgba(255,111,0,0.08);
  color: var(--qt-accent);
}

.qt-divider-gradient {
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--qt-primary), var(--qt-secondary), transparent);
  border: none;
  margin: 2rem auto;
  max-width: 200px;
  border-radius: 3px;
}

/* 标签 */
.qt-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  background: var(--qt-bg);
  border: 1px solid var(--qt-border);
  border-radius: 50px;
  font-size: 0.8125rem;
  color: var(--qt-text-secondary);
  transition: var(--qt-transition-smooth);
}
.qt-tag:hover { background: var(--qt-primary); color: #fff; border-color: var(--qt-primary); }

/* 面包屑 */
.qt-breadcrumb {
  background: linear-gradient(135deg, var(--qt-primary-dark) 0%, var(--qt-primary) 100%);
  padding: 2.5rem 0;
  color: #fff;
}
.qt-breadcrumb a { color: rgba(255,255,255,0.8); }
.qt-breadcrumb a:hover { color: #fff; }

/* FAQ手风琴 */
.qt-faq-item {
  border: 1px solid var(--qt-border);
  border-radius: var(--qt-radius-sm);
  margin-bottom: 0.75rem;
  overflow: hidden;
  background: var(--qt-surface);
}
.qt-faq-header {
  padding: 1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--qt-transition-smooth);
}
.qt-faq-header:hover { background: var(--qt-bg-warm); }
.qt-faq-body {
  padding: 0 1.25rem 1.25rem;
  color: var(--qt-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ================== 分页 ================== */
.qt-pagination .page-link {
  border: 1px solid var(--qt-border);
  color: var(--qt-text);
  font-weight: 600;
  padding: 0.625rem 1rem;
  margin: 0 0.25rem;
  border-radius: var(--qt-radius-sm);
  transition: var(--qt-transition-smooth);
}
.qt-pagination .page-link:hover {
  background: var(--qt-primary);
  color: #fff;
  border-color: var(--qt-primary);
}
.qt-pagination .active .page-link {
  background: var(--qt-primary);
  border-color: var(--qt-primary);
  color: #fff;
}

/* ================== 粘性CTA条 ================== */
.qt-sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--qt-glass);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--qt-border);
  padding: 0.75rem 1rem;
  z-index: 1030;
  transform: translateY(100%);
  transition: transform 0.4s ease;
}
.qt-sticky-cta.is-visible { transform: translateY(0); }

/* ================== 信任滚动条 ================== */
.qt-trust-marquee {
  overflow: hidden;
  white-space: nowrap;
  position: relative;
}
.qt-trust-track {
  display: inline-flex;
  animation: qtMarquee 30s linear infinite;
}
@keyframes qtMarquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ================== 流程步骤 ================== */
.qt-process-step {
  position: relative;
  text-align: center;
}
.qt-process-step-num {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--qt-surface);
  border: 2px solid var(--qt-primary);
  color: var(--qt-primary);
  font-weight: 800;
  font-size: 1.25rem;
  border-radius: 50%;
  margin: 0 auto 1rem;
  position: relative;
  z-index: 2;
  transition: var(--qt-transition-jelly);
}
.qt-process-step:hover .qt-process-step-num {
  background: var(--qt-primary);
  color: #fff;
  transform: scale(1.1);
}

/* ================== 响应式断点 ================== */
@media (max-width: 1199.98px) {
  .qt-bento-grid { grid-template-columns: repeat(3, 1fr); }
  .qt-bento-item.col-2-row-2 { grid-column: span 2; grid-row: span 1; }
  .qt-city-grid { grid-template-columns: repeat(5, 1fr); }
}

@media (max-width: 991.98px) {
  :root { --qt-section-gap: 5vh; }
  .qt-bento-grid { grid-template-columns: repeat(2, 1fr); }
  .qt-bento-item.col-2, .qt-bento-item.col-2-row-2 { grid-column: span 2; }
  .qt-bento-item.col-1-row-2 { grid-row: span 1; }
  .qt-city-grid { grid-template-columns: repeat(4, 1fr); }
  .qt-hero-terminal { min-height: 70vh; }
}

@media (max-width: 767.98px) {
  :root { --qt-section-gap: 4vh; --qt-container-gap: 1.5rem; }
  .qt-bento-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; padding: 0 1rem; }
  .qt-city-grid { grid-template-columns: repeat(3, 1fr); gap: 0.5rem; }
  .qt-article-card-img { aspect-ratio: 16 / 9; }
  .qt-carousel-caption { padding: 0 1rem; }
  .qt-terminal-box { padding: 1.25rem; }
  h1, .qt-h1 { font-size: clamp(1.75rem, 6vw, 2.5rem); }
  h2, .qt-h2 { font-size: clamp(1.375rem, 4vw, 1.75rem); }
}

@media (max-width: 575.98px) {
  .qt-bento-grid { grid-template-columns: repeat(2, 1fr); }
  .qt-city-grid { grid-template-columns: repeat(3, 1fr); }
  .qt-service-card { padding: 1.5rem; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  .qt-reveal { opacity: 1; transform: none; transition: none; }
  .qt-trust-track { animation: none; }
  .qt-terminal-cursor { animation: none; }
}