/* =========================================================================
   数字工厂二级页面专属定制样式 (Clean Light Tech Aesthetic)
   Author: AI Frontend Designer
   ========================================================================= */

/* --- 核心变量池 (浅色极简科技风) --- */
:root {
  --qdf-bg-main: #F8FAFC;         /* 干净清透背景 */
  --qdf-bg-accent: #EFF6FF;       /* 浅蓝色底调用于强调区块 */
  --qdf-blue: #0A66C2;            /* 稳重企业蓝 */
  --qdf-cyan: #0EA5E9;            /* 清爽活力青 (Sky) */
  --qdf-cyan-dim: rgba(14, 165, 233, 0.1);
  --qdf-purple: #8B5CF6;          /* 紫色点缀 AI/智能感 */
  --qdf-orange: #F59E0B;          /* 橙色预警/高亮 */
  
  --qdf-glass-bg: rgba(255, 255, 255, 0.7);
  --qdf-glass-border: rgba(0, 0, 0, 0.05); /* 非常轻微的内框 */
  --qdf-glass-blur: blur(20px);
  
  --qdf-text-main: #0F172A;       /* 主标题黑 */
  --qdf-text-sub: #334155;        /* 副标题深灰 */
  --qdf-text-mut: #64748B;        /* 辅助说明字灰 */
  
  --qdf-font-display: 'Sora', sans-serif;
  --qdf-font-body: 'Noto Sans SC', sans-serif;
  --qdf-section-space: clamp(76px, 7vw, 108px);
  --qdf-section-space-tight: clamp(56px, 5vw, 80px);
  --qdf-block-gap: clamp(24px, 3vw, 40px);
}

/* --- 全局覆盖 --- */
body.qdf-page {
  background-color: var(--qdf-bg-main);
  color: var(--qdf-text-sub);
  background-image: 
    radial-gradient(circle at 15% 25%, rgba(14, 165, 233, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(139, 92, 246, 0.06) 0%, transparent 40%);
  background-attachment: fixed;
  font-family: var(--qdf-font-body);
}

/* 强制重置 Navbar (适配浅色) */
body.qdf-page .navbar {
  background: rgba(255, 255, 255, 0.85) !important;
  backdrop-filter: var(--qdf-glass-blur) !important;
  border-bottom: 1px solid var(--qdf-glass-border) !important;
}
body.qdf-page .navbar-links a { color: var(--qdf-text-sub) !important; font-weight: 500; }
body.qdf-page .navbar-links a:hover { color: var(--qdf-blue) !important; }
body.qdf-page .navbar-brand .brand-logo-img { filter: none; }
body.qdf-page .nav-dropdown-trigger { color: var(--qdf-text-sub) !important; }

.qdf-main {
  display: flex;
  flex-direction: column;
}

.qdf-main > section {
  scroll-margin-top: calc(var(--nav-height) + 18px);
}

/* ================== 公共排版 ================== */
.qdf-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--qdf-cyan-dim);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 100px;
  color: var(--qdf-blue);
  font-family: var(--qdf-font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.qdf-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--qdf-cyan);
  border-radius: 50%;
  animation: pulseLight 2s infinite;
}

.qdf-title {
  font-family: var(--qdf-font-display);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--qdf-text-main);
  margin-bottom: 20px;
}
.qdf-title .highlight-cyan {
  background: linear-gradient(135deg, var(--qdf-blue) 0%, var(--qdf-cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 4px 15px rgba(14, 165, 233, 0.15); /* 浅色的投射感微光 */
}

.qdf-subtitle {
  font-size: 1.15rem;
  color: var(--qdf-text-mut);
  max-width: 800px;
  line-height: 1.8;
  font-weight: 400;
}

.qdf-section-title {
  font-size: clamp(2rem, 3.2vw, 2.65rem);
  margin-bottom: 14px;
}

.qdf-features-lead {
  max-width: none;
}

/* ================== Hero Section (左右分栏图文对齐) ================== */
.qdf-hero {
  position: relative;
  min-height: clamp(620px, 76vh, 820px);
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + 56px) 0 clamp(28px, 3vw, 42px);
  background: var(--qdf-bg-main);
  overflow: hidden;
}

.qdf-hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr; /* 左侧文字略宽以容纳长文本 */
  gap: clamp(40px, 5vw, 72px);
  align-items: center;
  position: relative;
  z-index: 10;
}

.qdf-hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.qdf-hero .qdf-title {
  margin-top: 14px;
  margin-bottom: 18px;
}

.qdf-hero-cta {
  display: flex;
  gap: 16px;
  margin-top: 20px;
}

.qdf-hero-visual {
  position: relative;
}

/* 规整写实大图为带有倒角的高级框架内的配图 */
.qdf-hero-image-wrapper {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08); /* 沉稳的阴影 */
  border: 4px solid #FFFFFF; /* 相框质感 */
}

.qdf-hero-img {
  width: 100%;
  height: auto;
  display: block;
  transform: scale(1.02);
  transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
  /* 约束图片的最大高度，不再占据全屏 */
  max-height: 520px;
  object-fit: cover;
}

.qdf-hero-image-wrapper:hover .qdf-hero-img {
  transform: scale(1.06);
}

/* 图片遮挡区悬浮数据卡 */
.qdf-hero-stat-card {
  position: absolute;
  bottom: 24px;
  left: -20px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  border: 1px solid var(--qdf-glass-border);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06);
  border-radius: 16px;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 20;
  animation: floatUp 4s ease-in-out infinite alternate;
}

.qdf-hero-stat-card i {
  font-size: 1.4rem;
  background: var(--qdf-bg-accent);
  width: 48px; height: 48px;
  display: flex; justify-content: center; align-items: center;
  border-radius: 50%;
}

.qdf-hero-stat-card strong {
  display: block; color: var(--qdf-text-main); font-size: 1.1rem;
}

.qdf-hero-stat-card span {
  color: var(--qdf-text-mut); font-size: 0.85rem;
}

@keyframes floatUp {
  from { transform: translateY(0); }
  to { transform: translateY(-12px); }
}


/* ================== Features Grid (充实的 2x2 结构) ================== */
.qdf-features {
  padding: var(--qdf-section-space) 5% var(--qdf-section-space-tight);
  position: relative;
  background-color: var(--qdf-bg-main);
  /* 增加由点构成的科技底纹网格，破除大面积纯色的空洞感 */
  background-image: radial-gradient(rgba(14, 165, 233, 0.08) 1px, transparent 1px);
  background-size: 30px 30px;
}
.qdf-features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr); /* 2x2 结构紧凑且饱满 */
  gap: 24px;
  margin-top: 32px;
}

.qdf-card {
  background: #FFFFFF;
  border: 1px solid var(--qdf-glass-border);
  border-radius: 20px;
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  z-index: 1;
}

/* 顶部霓虹渐变彩条 */
.qdf-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px; /* 加粗线条更醒目 */
  background: linear-gradient(90deg, transparent, var(--qdf-cyan), var(--qdf-blue));
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

/* 卡片内部的右下角科技点阵水印纹理，填充留白区域 */
.qdf-card::after {
  content: '';
  position: absolute;
  bottom: -50px; right: -50px;
  width: 220px; height: 220px;
  background-image: radial-gradient(circle, rgba(10, 102, 194, 0.1) 2px, transparent 2px);
  background-size: 16px 16px;
  border-radius: 50%;
  opacity: 0.4;
  transition: all 0.6s ease;
  z-index: -1;
}

.qdf-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05); /* 软糯的阴影 */
  border-color: rgba(14, 165, 233, 0.2);
}
.qdf-card:hover::before { transform: translateX(0); }
.qdf-card:hover::after { transform: scale(1.15); opacity: 0.8; } /* 互动时纹理浮出 */

.qdf-card-icon {
  font-size: 2.2rem;
  color: var(--qdf-blue);
  margin-bottom: 28px; /* 加大下方间距 */
  display: inline-block;
  background: linear-gradient(135deg, var(--qdf-bg-accent) 0%, #FFFFFF 100%);
  width: 70px; height: 70px;
  line-height: 70px;
  text-align: center;
  border-radius: 18px;
  border: 1px solid rgba(14, 165, 233, 0.1);
  box-shadow: 0 4px 10px rgba(10, 102, 194, 0.04);
}

.qdf-card h3 {
  font-family: var(--qdf-font-display);
  font-size: 1.55rem; /* 字号增大避免大尺寸留白空洞 */
  margin-bottom: 16px;
  color: var(--qdf-text-main);
  font-weight: 700;
}
.qdf-card p { 
  color: var(--qdf-text-sub); 
  line-height: 1.8; 
  font-size: 1.05rem; /* 增大字号，显得更丰满 */
}

/* 取消原有的复杂不对称跨行占用，回归极其整齐的2x2结构 */
.fc-1 { grid-column: auto; grid-row: auto; }
.fc-2 { grid-column: auto; grid-row: auto; }
.fc-3 { grid-column: auto; grid-row: auto; }
.fc-4 { grid-column: auto; grid-row: auto; }

/* ================== SVG Architecture Blueprint ================== */
.qdf-value-logic {
  padding: clamp(34px, 3.4vw, 52px) 5% var(--qdf-section-space-tight);
  background:
    radial-gradient(circle at 10% 18%, rgba(14, 165, 233, 0.08) 0%, transparent 28%),
    radial-gradient(circle at 88% 72%, rgba(37, 99, 235, 0.08) 0%, transparent 26%),
    linear-gradient(180deg, #F8FAFC 0%, #F3F7FD 46%, #F8FAFC 100%);
}

.qdf-arch-head {
  max-width: 960px;
}

.qdf-arch-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--qdf-blue);
  font-size: 0.78rem;
  font-family: var(--qdf-font-display);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.qdf-arch-kicker::before {
  content: '';
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, rgba(10, 102, 194, 0.18) 0%, rgba(14, 165, 233, 0.9) 100%);
}

.qdf-arch-head .qdf-subtitle {
  max-width: 920px;
  font-size: 1.06rem;
  line-height: 1.78;
  text-wrap: pretty;
}

.qdf-arch-frame {
  position: relative;
  margin-top: 34px;
  padding: 18px;
  border-radius: 38px;
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.9) 0%, rgba(244, 249, 255, 0.94) 100%);
  border: 1px solid rgba(255, 255, 255, 0.78);
  box-shadow:
    0 28px 70px rgba(15, 23, 42, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.82);
}

.qdf-arch-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(14, 165, 233, 0.12) 0%, transparent 22%),
    radial-gradient(circle at 88% 82%, rgba(37, 99, 235, 0.1) 0%, transparent 22%),
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: auto, auto, 24px 24px, 24px 24px;
  pointer-events: none;
}

.qdf-arch-frame::after {
  content: '';
  position: absolute;
  inset: 10%;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
  filter: blur(28px);
  pointer-events: none;
}

.qdf-arch-board {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.qdf-arch-layer {
  position: relative;
  display: grid;
  grid-template-columns: 252px minmax(0, 1fr);
  gap: 22px;
  padding: 28px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.12);
  box-shadow:
    0 18px 40px rgba(15, 23, 42, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.82);
}

.qdf-arch-layer-core {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(237, 244, 255, 0.96) 100%);
  border-color: rgba(96, 165, 250, 0.18);
}

.qdf-arch-layer-dark,
.qdf-arch-layer-engine {
  background: linear-gradient(135deg, #09172A 0%, #10253F 52%, #17345D 100%);
  border-color: rgba(147, 197, 253, 0.12);
}

.qdf-arch-layer-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.qdf-arch-layer-no {
  flex: 0 0 52px;
  width: 52px;
  height: 52px;
  border-radius: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.14) 0%, rgba(37, 99, 235, 0.14) 100%);
  border: 1px solid rgba(14, 165, 233, 0.18);
  color: var(--qdf-blue);
  font-family: var(--qdf-font-display);
  font-size: 1rem;
  font-weight: 800;
}

.qdf-arch-layer-copy {
  min-width: 0;
}

.qdf-arch-layer-kicker {
  margin-bottom: 10px;
  color: var(--qdf-blue);
  font-family: var(--qdf-font-display);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.qdf-arch-layer-title {
  margin-bottom: 10px;
  color: var(--qdf-text-main);
  font-family: var(--qdf-font-display);
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1.2;
  text-wrap: balance;
}

.qdf-arch-layer-desc {
  color: var(--qdf-text-mut);
  font-size: 0.92rem;
  line-height: 1.75;
  text-wrap: pretty;
}

.qdf-arch-layer-dark .qdf-arch-layer-kicker,
.qdf-arch-layer-engine .qdf-arch-layer-kicker {
  color: rgba(191, 219, 254, 0.92);
}

.qdf-arch-layer-dark .qdf-arch-layer-title,
.qdf-arch-layer-engine .qdf-arch-layer-title {
  color: #F8FAFC;
}

.qdf-arch-layer-dark .qdf-arch-layer-desc,
.qdf-arch-layer-engine .qdf-arch-layer-desc {
  color: rgba(226, 232, 240, 0.78);
}

.qdf-arch-cards {
  display: grid;
  gap: 14px;
}

.qdf-arch-cards-4 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.qdf-arch-cards-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.qdf-arch-card {
  min-height: 136px;
  padding: 18px 18px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(247, 250, 255, 0.95) 100%);
  border: 1px solid rgba(148, 163, 184, 0.12);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.04);
}

.qdf-arch-card h4,
.qdf-arch-core-body h4,
.qdf-arch-domain-card h4,
.qdf-arch-engine-panel h4 {
  margin-bottom: 10px;
  color: var(--qdf-text-main);
  font-family: var(--qdf-font-display);
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.35;
  text-wrap: balance;
}

.qdf-arch-card p,
.qdf-arch-core-body p,
.qdf-arch-domain-card p,
.qdf-arch-engine-panel p {
  color: var(--qdf-text-mut);
  font-size: 0.86rem;
  line-height: 1.68;
  text-wrap: pretty;
}

.qdf-arch-core-panel {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 22px 24px;
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.88) 0%, rgba(233, 242, 255, 0.94) 100%);
  border: 1px solid rgba(96, 165, 250, 0.16);
}

.qdf-arch-core-badge {
  width: 132px;
  height: 132px;
  margin: 0 auto;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 35% 30%, #FFFFFF 0%, #E9F3FF 100%);
  border: 1px solid rgba(96, 165, 250, 0.22);
  box-shadow:
    0 18px 36px rgba(37, 99, 235, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.88);
  color: var(--qdf-text-main);
  font-family: var(--qdf-font-display);
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.qdf-arch-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.qdf-arch-chip,
.qdf-arch-engine-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.qdf-arch-chip {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(37, 99, 235, 0.12);
  color: var(--qdf-blue);
}

.qdf-arch-domain-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.qdf-arch-domain-card {
  min-height: 132px;
  padding: 16px 15px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(191, 219, 254, 0.12);
}

.qdf-arch-domain-card h4 {
  color: #F8FAFC;
}

.qdf-arch-domain-card p {
  color: rgba(226, 232, 240, 0.76);
}

.qdf-arch-domain-modules {
  margin-bottom: 8px;
  color: rgba(191, 219, 254, 0.96);
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.55;
  text-wrap: pretty;
}

.qdf-arch-layer-engine .qdf-arch-layer-no {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(191, 219, 254, 0.16);
  color: #E0F2FE;
}

.qdf-arch-engine-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(191, 219, 254, 0.12);
}

.qdf-arch-layer-engine .qdf-arch-engine-panel h4,
.qdf-arch-layer-engine .qdf-arch-engine-panel p {
  color: #F8FAFC;
}

.qdf-arch-layer-engine .qdf-arch-engine-panel p {
  color: rgba(224, 242, 254, 0.82);
}

.qdf-arch-engine-tag {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(191, 219, 254, 0.16);
  color: #E0F2FE;
  white-space: nowrap;
}

/* ================== 14 Systems Bento Box (Light Mode) ================== */
.qdf-systems {
  padding: var(--qdf-section-space) 5% var(--qdf-section-space-tight);
  background: linear-gradient(to bottom, var(--qdf-bg-main), var(--qdf-bg-accent), var(--qdf-bg-main));
}

.systems-container {
  margin-top: 36px;
  position: relative;
  min-height: 700px;
  --sys-accent: #0EA5E9;
  --sys-accent-soft: rgba(14, 165, 233, 0.16);
  --sys-accent-glow: rgba(14, 165, 233, 0.28);
  --sys-secondary-soft: rgba(139, 92, 246, 0.18);
}

.sys-connector-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
  z-index: 4;
}
.sys-connector-path {
  fill: none;
  stroke: var(--sys-accent);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-dasharray: 10 14;
  opacity: 0.82;
  filter: drop-shadow(0 0 14px rgba(14, 165, 233, 0.24));
  animation: sysConnectorFlow 9s linear infinite;
}
.sys-connector-pulse {
  fill: var(--sys-accent);
  opacity: 0.9;
  filter: drop-shadow(0 0 10px rgba(14, 165, 233, 0.3));
}
@keyframes sysConnectorFlow {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: -160; }
}

.sys-sidebar {
  position: relative;
  min-height: 700px;
  padding: 24px;
  border-radius: 36px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.88) 0%, rgba(255, 255, 255, 0.72) 46%, rgba(248, 250, 252, 0.88) 100%);
  border: 1px solid rgba(255, 255, 255, 0.76);
  box-shadow:
    0 36px 80px rgba(15, 23, 42, 0.09),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(24px);
  overflow: hidden;
}
.sys-sidebar::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 16% 20%, rgba(14, 165, 233, 0.16) 0%, transparent 26%),
    radial-gradient(circle at 64% 58%, rgba(59, 130, 246, 0.12) 0%, transparent 26%),
    radial-gradient(circle at 88% 18%, rgba(139, 92, 246, 0.12) 0%, transparent 22%),
    linear-gradient(rgba(148, 163, 184, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.08) 1px, transparent 1px);
  background-size: auto, auto, auto, 28px 28px, 28px 28px;
  border-radius: inherit;
  pointer-events: none;
}
.sys-sidebar::after {
  content: '';
  position: absolute;
  inset: 18px;
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.46);
  pointer-events: none;
}

.sys-map-head,
.sys-map-stage,
.sys-content-area {
  position: relative;
  z-index: 1;
}
.sys-map-head {
  position: absolute;
  top: 24px;
  left: 26px;
  right: auto;
  display: flex;
  justify-content: flex-start;
  gap: 24px;
  align-items: flex-start;
  pointer-events: none;
}
.sys-map-copy {
  max-width: none;
}
.sys-map-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 0;
  color: var(--qdf-text-mut);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-family: var(--qdf-font-display);
  font-weight: 700;
}
.sys-map-kicker::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sys-accent);
  box-shadow: 0 0 0 8px var(--sys-accent-soft);
}
.sys-map-stage {
  position: relative;
  min-height: 644px;
  border-radius: 28px;
  overflow: hidden;
}

.sys-map-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.sys-grid-layer rect {
  fill: rgba(255, 255, 255, 0.16);
}
.sys-orbit {
  fill: none;
  stroke: rgba(148, 163, 184, 0.12);
  stroke-width: 1.5;
}
.sys-orbit.orbit-1 {
  stroke-dasharray: 7 14;
}
.sys-orbit.orbit-2 {
  stroke-dasharray: 5 12;
}
.sys-orbit.orbit-3 {
  stroke: rgba(14, 165, 233, 0.18);
  stroke-dasharray: 4 10;
}
.sys-arc {
  fill: none;
  stroke: rgba(14, 165, 233, 0.22);
  stroke-width: 2;
  stroke-linecap: round;
  filter: drop-shadow(0 0 10px rgba(14, 165, 233, 0.18));
}
.sys-arc.arc-1,
.sys-arc.arc-2 {
  stroke-dasharray: 12 20;
  animation: sysArcDrift 22s linear infinite;
}
.sys-arc.arc-3 {
  stroke: rgba(139, 92, 246, 0.18);
  stroke-dasharray: 10 18;
  animation: sysArcDrift 18s linear infinite reverse;
}
@keyframes sysArcDrift {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: -800; }
}

.sys-link-base {
  fill: none;
  stroke: rgba(148, 163, 184, 0.12);
  stroke-width: 2;
  stroke-linecap: round;
}
.sys-link-flow {
  fill: none;
  stroke: url(#sys-line-gradient);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-dasharray: 10 18;
  animation: sysLineFlow 14s linear infinite;
  opacity: 0.82;
}
.sys-mesh-base {
  fill: none;
  stroke: rgba(148, 163, 184, 0.12);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.sys-mesh-base.alt {
  stroke: rgba(148, 163, 184, 0.08);
  stroke-dasharray: 8 18;
}
.sys-mesh-flow {
  fill: none;
  stroke: url(#sys-line-gradient);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 12 20;
  animation: sysMeshFlow 24s linear infinite;
  opacity: 0.44;
}
.sys-mesh-flow.alt {
  stroke-width: 1.7;
  stroke-dasharray: 8 18;
  animation-duration: 30s;
  opacity: 0.26;
}
@keyframes sysLineFlow {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: -600; }
}
@keyframes sysMeshFlow {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: -900; }
}

.sys-hub-pulse {
  fill: rgba(14, 165, 233, 0.06);
  animation: sysHubPulse 3.6s ease-in-out infinite;
}
.sys-hub-ring {
  fill: rgba(255, 255, 255, 0.1);
  stroke: rgba(14, 165, 233, 0.22);
  stroke-width: 2;
}
.sys-hub-core {
  fill: url(#sys-hub-gradient);
  stroke: rgba(255, 255, 255, 0.78);
  stroke-width: 1.5;
}
.sys-hub-title {
  fill: var(--qdf-text-main);
  text-anchor: middle;
  font-family: var(--qdf-font-display);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}
.sys-hub-subtitle {
  fill: var(--qdf-text-mut);
  text-anchor: middle;
  font-family: var(--qdf-font-body);
  font-size: 1rem;
  font-weight: 600;
}
@keyframes sysHubPulse {
  0%, 100% { transform: scale(1); opacity: 0.28; transform-origin: 452px 384px; }
  50% { transform: scale(1.08); opacity: 0.62; transform-origin: 452px 384px; }
}

.sys-node-btn {
  position: absolute;
  left: var(--x);
  top: var(--y);
  transform: translate(-50%, -50%);
  width: 112px;
  min-width: 112px;
  min-height: 96px;
  padding: 12px 10px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(148, 163, 184, 0.12);
  color: var(--qdf-text-mut);
  cursor: pointer;
  transition:
    transform 0.35s cubic-bezier(0.2, 0.65, 0.2, 1),
    border-color 0.35s ease,
    box-shadow 0.35s ease,
    background 0.35s ease,
    color 0.35s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
  font-family: var(--qdf-font-display);
  font-weight: 600;
  line-height: 1.2;
  overflow: hidden;
  isolation: isolate;
  box-shadow:
    0 14px 28px rgba(15, 23, 42, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(16px);
}
.sys-node-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.52) 0%, rgba(255, 255, 255, 0) 58%),
    linear-gradient(135deg, var(--sys-accent-soft) 0%, rgba(255, 255, 255, 0) 70%);
  opacity: 0.85;
  z-index: -1;
}
.sys-node-btn i {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.74rem;
  text-align: center;
  color: rgba(59, 130, 246, 0.78);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.14);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.86);
  transition: transform 0.35s ease, color 0.35s ease, background 0.35s ease, box-shadow 0.35s ease;
}
.sys-node-btn strong {
  font-size: 0.9rem;
  color: var(--qdf-text-main);
  letter-spacing: 0.02em;
}
.sys-node-btn span {
  font-size: 0.68rem;
  color: var(--qdf-text-mut);
  line-height: 1.35;
}

.sys-node-btn:hover {
  background: rgba(255, 255, 255, 0.82);
  color: var(--qdf-text-sub);
  border-color: rgba(148, 163, 184, 0.28);
  box-shadow: 0 18px 34px rgba(15, 23, 42, 0.08);
  transform: translate(-50%, calc(-50% - 6px));
}
.sys-node-btn:hover::before { opacity: 1; }
.sys-node-btn:focus-visible {
  outline: none;
  border-color: var(--sys-accent);
  box-shadow: 0 0 0 4px var(--sys-accent-soft), 0 18px 34px rgba(15, 23, 42, 0.08);
}
.sys-node-btn.active {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(239, 246, 255, 0.9) 100%);
  border-color: var(--sys-accent-glow);
  color: var(--qdf-text-main);
  box-shadow:
    0 24px 38px rgba(15, 23, 42, 0.12),
    0 0 0 1px rgba(255, 255, 255, 0.54) inset,
    0 0 0 12px rgba(14, 165, 233, 0.08);
  transform: translate(-50%, calc(-50% - 10px)) scale(1.04);
}
.sys-node-btn.active::before { opacity: 1; }
.sys-node-btn.active i {
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--sys-accent) 0%, var(--qdf-blue) 100%);
  box-shadow: 0 12px 24px var(--sys-accent-soft);
  transform: translateY(-2px) scale(1.03);
}
.sys-node-btn.active strong,
.sys-node-btn.active span {
  color: var(--qdf-text-main);
}

.sys-content-area {
  position: absolute;
  top: 50%;
  right: 28px;
  width: min(360px, 31%);
  min-height: 0;
  border-radius: 30px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.86) 100%);
  border: 1px solid rgba(255, 255, 255, 0.74);
  box-shadow:
    0 30px 72px rgba(15, 23, 42, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.74);
  padding: 18px 18px 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  isolation: isolate;
  --spotlight-x: 28%;
  --spotlight-y: 18%;
  backdrop-filter: blur(28px);
  z-index: 5;
  transform: translateY(-50%);
}
.sys-content-area::before {
  content: '';
  position: absolute;
  top: -80px;
  left: -50px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, var(--sys-accent-soft) 0%, transparent 68%);
  filter: blur(18px);
  opacity: 0.85;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
.sys-content-area::after {
  content: '';
  position: absolute;
  inset: -30%;
  background:
    radial-gradient(circle at var(--spotlight-x) var(--spotlight-y), var(--sys-secondary-soft) 0%, rgba(255, 255, 255, 0) 22%),
    radial-gradient(circle at calc(var(--spotlight-x) + 18%) calc(var(--spotlight-y) + 10%), var(--sys-accent-soft) 0%, rgba(255, 255, 255, 0) 28%);
  opacity: 0.92;
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.25s ease;
}

.sys-content-area > * {
  position: relative;
  z-index: 1;
}

.sys-panel-dock {
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.96) 0%, var(--sys-accent-soft) 58%, rgba(255, 255, 255, 0) 72%);
  border: 1px solid var(--sys-accent-glow);
  box-shadow: 0 0 0 10px rgba(14, 165, 233, 0.08);
  pointer-events: none;
}
.sys-panel-glow {
  position: absolute;
  left: -120px;
  top: 50%;
  transform: translateY(-50%);
  width: 220px;
  height: 180px;
  background: radial-gradient(circle, var(--sys-accent-soft) 0%, rgba(255, 255, 255, 0) 74%);
  filter: blur(16px);
  pointer-events: none;
}

.sys-panel { display: none; animation: panelLift 0.55s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.sys-panel.active { display: block; }
@keyframes panelLift {
  from { opacity: 0; transform: translateY(18px) scale(0.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.sp-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  padding-top: 0;
  padding-right: 0;
}
.sp-icon {
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, var(--qdf-bg-accent) 0%, #FFFFFF 100%);
  border: 1px solid var(--sys-accent-glow);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: var(--sys-accent);
}
.sp-title-wrapper h2 { font-family: var(--qdf-font-display); font-size: 1.7rem; color: var(--qdf-text-main); margin-bottom: 3px; line-height: 1.04;}
.sp-title-wrapper p { color: var(--sys-accent); font-weight: 600; font-size: 0.9rem;}

.sp-features { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-bottom: 0; }
.sp-feature {
  position: relative;
  background: rgba(248, 250, 252, 0.86);
  border: 1px solid rgba(148, 163, 184, 0.16);
  padding: 14px;
  border-radius: 14px;
  overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease, background 0.35s ease;
}
.sp-feature::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--sys-accent-soft) 0%, rgba(255, 255, 255, 0) 65%);
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}
.sp-feature:hover {
  transform: translateY(-6px);
  border-color: var(--sys-accent-glow);
  box-shadow: 0 20px 32px rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.96);
}
.sp-feature:hover::before { opacity: 1; }
.sp-feature strong,
.sp-feature span {
  position: relative;
  z-index: 1;
}
.sp-feature strong { display: block; color: var(--qdf-text-sub); margin-bottom: 5px; font-size: 0.92rem; }
.sp-feature span {
  color: var(--qdf-text-mut);
  font-size: 0.82rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sys-panel.active .sp-feature { animation: featureRise 0.5s ease both; }
.sys-panel.active .sp-feature:nth-child(1) { animation-delay: 0.08s; }
.sys-panel.active .sp-feature:nth-child(2) { animation-delay: 0.16s; }
.sys-panel.active .sp-feature:nth-child(3) { animation-delay: 0.24s; }
.sys-panel.active .sp-feature:nth-child(4) { animation-delay: 0.32s; }
@keyframes featureRise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ================== Flow chart / Workflows (Light Edition) ================== */
.qdf-workflow { padding: var(--qdf-section-space-tight) 5%; background: var(--qdf-bg-main);}
.wf-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 32px;
  align-items: stretch;
}
.wf-grid::before {
  content: '';
  position: absolute;
  left: 8%;
  right: 8%;
  top: 118px;
  height: 1px;
  background: linear-gradient(90deg, rgba(14, 165, 233, 0) 0%, rgba(14, 165, 233, 0.4) 18%, rgba(37, 99, 235, 0.36) 50%, rgba(245, 158, 11, 0.3) 82%, rgba(245, 158, 11, 0) 100%);
  pointer-events: none;
}
.wf-path {
  --wf-accent: #0EA5E9;
  --wf-accent-soft: rgba(14, 165, 233, 0.12);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  height: 100%;
  padding: 24px 18px 18px;
  background:
    radial-gradient(circle at 18% 14%, var(--wf-accent-soft) 0%, transparent 26%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.92) 100%);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 24px;
  text-align: center;
  z-index: 1;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.05);
  overflow: hidden;
}
.wf-path-growth { --wf-accent: #0EA5E9; --wf-accent-soft: rgba(14, 165, 233, 0.14); }
.wf-path-plan { --wf-accent: #2563EB; --wf-accent-soft: rgba(37, 99, 235, 0.14); }
.wf-path-ops { --wf-accent: #8B5CF6; --wf-accent-soft: rgba(139, 92, 246, 0.14); }
.wf-path-supply { --wf-accent: #F59E0B; --wf-accent-soft: rgba(245, 158, 11, 0.14); }
.wf-path::after {
  content: '';
  position: absolute;
  top: 118px;
  right: -30px;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.3) 0%, rgba(14, 165, 233, 0.72) 100%);
  border-top: 2px dashed rgba(37, 99, 235, 0.82);
  z-index: 0;
}
.wf-path:last-child::after { display: none; }
.wf-path-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.14);
  color: var(--wf-accent);
  font-family: var(--qdf-font-display);
  font-weight: 800;
  font-size: 0.82rem;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.06);
}

.wf-icon-wrap {
  width: 88px;
  height: 88px;
  margin: 2px auto 4px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  border: 2px solid var(--wf-accent);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--wf-accent);
  position: relative;
}
.wf-path h4 {
  color: var(--qdf-text-main);
  font-size: 1.22rem;
  font-family: var(--qdf-font-display);
  margin-bottom: 0;
}
.wf-summary {
  color: var(--wf-accent);
  font-size: 0.98rem;
  line-height: 1.4;
  font-weight: 700;
  min-height: auto;
  margin: 0;
}
.wf-system-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 4px;
}
.wf-system-grid-three {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.wf-system-grid-three .wf-system-chip:last-child {
  grid-column: span 2;
}
.wf-system-chip {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 5px;
  min-height: 62px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(148, 163, 184, 0.12);
  text-align: left;
  box-shadow:
    0 12px 24px rgba(15, 23, 42, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.84);
}
.wf-system-chip strong {
  color: var(--qdf-text-main);
  font-size: 0.96rem;
  font-family: var(--qdf-font-display);
  letter-spacing: 0.04em;
}
.wf-system-chip em {
  color: var(--qdf-text-mut);
  font-style: normal;
  font-size: 0.8rem;
  line-height: 1.3;
}

/* ================== Deployments ================== */
.qdf-deployment { padding: var(--qdf-section-space-tight) 5% calc(var(--qdf-section-space-tight) + 12px); text-align: center; background: #FFFFFF; }
.dep-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin: 30px 0 0; }
.dep-badge {
  padding: 12px 24px; background: var(--qdf-bg-main); border: 1px solid var(--qdf-glass-border);
  border-radius: 100px; color: var(--qdf-text-sub); font-weight: 500; display: flex; align-items: center; gap: 10px;
  transition: all 0.3s;
}
.dep-badge:hover { background: var(--qdf-blue); color: #fff; transform: translateY(-3px); box-shadow: 0 10px 20px rgba(10,102,194,0.2); }
.dep-badge:hover i { color: #fff; }
.dep-badge i { color: var(--qdf-blue); }

.dep-stats { display: flex; justify-content: center; gap: 40px; margin-top: 40px; flex-wrap: wrap; }
.dep-stat-item { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.dep-num {
  font-size: 3.5rem; font-weight: 800; font-family: var(--qdf-font-display);
  background: linear-gradient(to bottom, var(--qdf-blue), var(--qdf-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.dep-desc { color: var(--qdf-text-sub); font-size: 1.1rem; font-weight: 500;}

body.qdf-page .section.contact {
  padding: var(--qdf-section-space-tight) 0;
}

body.qdf-page .section.contact .section-header {
  margin-bottom: 40px;
}

body.qdf-page .contact-card {
  max-width: 1100px;
  margin: 0 auto;
}

body.qdf-page .footer {
  padding: 34px 0 22px;
}

body.qdf-page .footer-bottom {
  padding-top: 18px;
}

@keyframes pulseLight { 0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.4); } 50% { opacity: 0.6; box-shadow: 0 0 0 8px rgba(14, 165, 233, 0); } }

/* 响应式 */
@media (max-width: 1024px) {
  .qdf-features-grid { grid-template-columns: repeat(2, 1fr); }
  .fc-1, .fc-2, .fc-3, .fc-4 { grid-column: auto; grid-row: auto; }
  .qdf-arch-frame {
    padding: 14px;
    border-radius: 32px;
  }
  .qdf-arch-layer {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .qdf-arch-cards-4,
  .qdf-arch-cards-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .qdf-arch-domain-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .qdf-arch-core-panel {
    grid-template-columns: 120px minmax(0, 1fr);
  }
  .qdf-arch-core-badge {
    width: 108px;
    height: 108px;
    font-size: 2rem;
  }
  .qdf-arch-engine-panel {
    flex-direction: column;
    align-items: flex-start;
  }
  .systems-container {
    min-height: 0;
    gap: 24px;
  }
  .sys-sidebar {
    min-height: 620px;
    padding: 22px;
  }
  .sys-map-head {
    left: 22px;
    right: auto;
    top: 22px;
    flex-direction: column;
    align-items: flex-start;
  }
  .sys-map-stage { min-height: 620px; }
  .sys-content-area {
    width: min(380px, 38%);
    top: 50%;
    right: 22px;
    padding: 20px 20px 22px;
  }
  .sys-panel-glow {
    left: -90px;
    width: 170px;
  }
  .wf-grid::before { display: none; }
  .wf-grid { grid-template-columns: repeat(2, 1fr); }
  .wf-path::after { display: none; }
  .dep-stats { gap: 28px; margin-top: 34px; }
}
@media (max-width: 768px) {
  .qdf-title { font-size: 2.2rem; }
  .qdf-section-title { font-size: clamp(1.85rem, 7vw, 2.2rem); }
  .qdf-hero {
    min-height: 0;
    padding: 108px 5% 28px;
  }
  .qdf-hero-container { gap: 28px; }
  .qdf-features,
  .qdf-value-logic,
  .qdf-systems,
  .qdf-workflow,
  .qdf-deployment {
    padding-top: 56px;
    padding-bottom: 56px;
  }
  .qdf-value-logic {
    padding-top: 40px;
  }
  .qdf-arch-frame {
    margin-top: 26px;
    padding: 10px;
    border-radius: 26px;
  }
  .qdf-arch-board {
    gap: 14px;
  }
  .qdf-arch-layer {
    padding: 20px;
    border-radius: 24px;
  }
  .qdf-arch-layer-head {
    gap: 14px;
  }
  .qdf-arch-layer-no {
    flex-basis: 44px;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    font-size: 0.92rem;
  }
  .qdf-arch-layer-title {
    font-size: 1.22rem;
  }
  .qdf-arch-layer-desc {
    font-size: 0.88rem;
    line-height: 1.7;
  }
  .qdf-arch-cards-4,
  .qdf-arch-cards-3,
  .qdf-arch-domain-grid {
    grid-template-columns: 1fr;
  }
  .qdf-arch-card,
  .qdf-arch-domain-card {
    min-height: 0;
  }
  .qdf-arch-card h4,
  .qdf-arch-core-body h4,
  .qdf-arch-domain-card h4,
  .qdf-arch-engine-panel h4 {
    font-size: 1.02rem;
  }
  .qdf-arch-card p,
  .qdf-arch-core-body p,
  .qdf-arch-domain-card p,
  .qdf-arch-engine-panel p {
    font-size: 0.86rem;
  }
  .qdf-arch-core-panel {
    grid-template-columns: 1fr;
    padding: 18px;
    gap: 18px;
  }
  .qdf-arch-core-badge {
    width: 92px;
    height: 92px;
    font-size: 1.7rem;
  }
  .qdf-arch-chip-row {
    gap: 8px;
  }
  .qdf-arch-chip,
  .qdf-arch-engine-tag {
    font-size: 0.78rem;
    padding: 7px 12px;
  }
  .qdf-arch-engine-panel {
    padding: 18px;
  }
  .qdf-features-lead {
    white-space: normal;
  }
  .systems-container {
    margin-top: 26px;
  }
  .qdf-features-grid { grid-template-columns: 1fr; }
  .sys-sidebar {
    min-height: 0;
    padding: 18px;
  }
  .sys-map-head {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    margin-bottom: 10px;
  }
  .sys-map-stage { min-height: 340px; }
  .sys-node-btn {
    width: 72px;
    min-width: 72px;
    min-height: 72px;
    padding: 8px 6px;
    border-radius: 16px;
    gap: 4px;
  }
  .sys-node-btn i {
    width: 26px;
    height: 26px;
    border-radius: 10px;
    font-size: 0.74rem;
  }
  .sys-node-btn strong {
    font-size: 0.56rem;
    letter-spacing: 0.08em;
  }
  .sys-node-btn span {
    display: none;
  }
  .sys-node-btn:hover {
    transform: translate(-50%, calc(-50% - 3px));
  }
  .sys-node-btn.active {
    transform: translate(-50%, calc(-50% - 5px)) scale(1.02);
  }
  .sys-content-area {
    position: relative;
    top: auto;
    right: auto;
    bottom: auto;
    width: 100%;
    padding: 24px 20px 24px;
    border-radius: 24px;
    transform: none;
  }
  .sys-connector-layer,
  .sys-panel-dock,
  .sys-panel-glow {
    display: none;
  }
  .sp-header {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 0;
    padding-right: 0;
  }
  .sp-features { grid-template-columns: 1fr; }
  .wf-grid { grid-template-columns: 1fr; }
  .dep-badges { margin-top: 24px; }
  .dep-stats { gap: 30px; flex-direction: column; }
  body.qdf-page .section.contact {
    padding: 56px 0;
  }
  body.qdf-page .section.contact .section-header {
    margin-bottom: 28px;
  }
}
@media (max-width: 560px) {
  .sys-sidebar { padding: 14px; }
  .sys-map-head { gap: 14px; }
  .sys-map-stage { min-height: 300px; }
  .sys-node-btn {
    width: 58px;
    min-width: 58px;
    min-height: 58px;
    padding: 6px 5px;
    border-radius: 14px;
    gap: 3px;
  }
  .sys-node-btn i {
    width: 22px;
    height: 22px;
    font-size: 0.68rem;
  }
  .sys-node-btn strong {
    font-size: 0.5rem;
  }
  .sp-title-wrapper h2 { font-size: 1.75rem; }
  .sp-icon { width: 54px; height: 54px; font-size: 1.45rem; }
}
@media (prefers-reduced-motion: reduce) {
  .sys-node-btn,
  .sys-node-btn i,
  .sys-link-flow,
  .sys-mesh-flow,
  .sys-hub-pulse,
  .sp-feature,
  .sys-panel,
  .sys-content-area::after {
    animation: none !important;
    transition: none !important;
  }
}