/* ========================================
   方案一：专业权威型 - 深色科技风样式
   ======================================== */

/* 覆盖公共样式变量 */
.style-1-authority {
  --color-primary: #1a237e;
  --color-secondary: #283593;
  --color-accent: #ffd700;
  --color-accent-soft: rgba(255, 215, 0, 0.2);
  --color-background-dark: #0a0e1a;
  --color-background-gradient: linear-gradient(135deg, #0a0e1a 0%, #1a237e 50%, #283593 100%);
  --color-text-light: #e0e0e0;
  --color-text-muted: #9e9e9e;
  --color-border: rgba(255, 215, 0, 0.3);
  --color-glow: rgba(83, 109, 254, 0.5);
}

body.style-1-authority {
  background: var(--color-background-dark);
  color: var(--color-text-light);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  overflow-x: hidden;
}

/* ============================================
   头部导航
   ============================================ */
.header {
  background: rgba(10, 14, 26, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all var(--transition-base);
  color: var(--color-text-light);
}

.header.scrolled {
  background: rgba(10, 14, 26, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

/* 头部内部容器 - Flexbox布局 */
.header > .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  max-width: 1400px;
  position: relative;
}

.nav-brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
  font-size: var(--font-size-xl);
  color: var(--color-accent);
  text-decoration: none;
  transition: all var(--transition-base);
}

.logo:hover {
  transform: scale(1.05);
  text-shadow: 0 0 20px var(--color-glow);
}

/* 汉堡菜单图标 */
.mobile-menu-toggle {
  display: none; /* 默认隐藏，由responsive.css在移动端显示 */
  background: transparent;
  border: 1px solid var(--color-accent);
  border-radius: 8px;
  cursor: pointer;
  padding: 10px;
  color: var(--color-accent);
  z-index: 1001;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
}

.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-accent);
  margin: 3px 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-sm);
}

.nav-menu li {
  margin: 0;
}

.nav-menu li a {
  display: block;
  color: var(--color-text-light);
  font-weight: 500;
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius-md);
  transition: all var(--transition-base);
  position: relative;
  text-decoration: none;
}

.nav-menu li a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-menu li a:hover::before {
  width: 80%;
}

.nav-menu li a:hover {
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.nav-menu li a.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
  padding: 0.5rem 1.5rem;
}

.nav-menu li a.btn-primary:hover {
  background: var(--color-accent);
  color: var(--color-primary);
  box-shadow: 0 0 20px var(--color-glow);
}

/* ============================================
   英雄区域
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-background-gradient);
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  z-index: 1;
}

.hero-content {
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: 0.5rem 1.5rem;
  border-radius: var(--border-radius-2xl);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  backdrop-filter: blur(10px);
}

.badge-icon {
  font-size: var(--font-size-lg);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, #ffffff 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title .highlight {
  display: block;
  font-size: 2rem;
  font-weight: 600;
  margin-top: var(--spacing-sm);
  background: linear-gradient(135deg, var(--color-accent) 0%, #ffeb3b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-2xl);
  line-height: var(--line-height-relaxed);
}

.hero-stats {
  display: flex;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-accent);
  text-shadow: 0 0 30px var(--color-glow);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-cta {
  margin-bottom: var(--spacing-2xl);
}

.hero-cta .btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, #ffeb3b 100%);
  color: var(--color-primary);
  padding: 1rem 3rem;
  font-size: var(--font-size-xl);
  font-weight: 700;
  border: none;
  box-shadow: 0 10px 40px rgba(255, 215, 0, 0.3);
  transition: all var(--transition-base);
}

.hero-cta .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 50px rgba(255, 215, 0, 0.5);
}

.btn-icon {
  margin-left: var(--spacing-sm);
  transition: transform var(--transition-base);
}

.btn-primary:hover .btn-icon {
  transform: translateX(5px);
}

.cta-note {
  margin-top: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.trust-badges {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.trust-badge img {
  filter: drop-shadow(0 0 10px var(--color-glow));
}

/* 智力仪表盘 */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.iq-gauge {
  position: relative;
  width: 350px;
  height: 350px;
}

.gauge-svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 30px var(--color-glow));
}

.gauge-bg {
  fill: none;
  stroke: rgba(255, 215, 0, 0.2);
  stroke-width: 12;
}

.gauge-fill {
  fill: none;
  stroke: url(#gaugeGradient);
  stroke-width: 12;
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: center;
  animation: gaugeAnimation 2s ease-out forwards;
  stroke: var(--color-accent);
}

@keyframes gaugeAnimation {
  from {
    stroke-dashoffset: 452;
  }
}

.gauge-value {
  font-size: 48px;
  font-weight: 800;
  fill: var(--color-accent);
  text-shadow: 0 0 20px var(--color-glow);
}

.gauge-label {
  font-size: 14px;
  fill: var(--color-text-muted);
  font-weight: 500;
}

.gauge-info {
  position: absolute;
  bottom: 75px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  background: rgba(10, 14, 26, 0.8);
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}

.gauge-info p {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.gauge-info .highlight {
  color: var(--color-accent);
  font-weight: 700;
}

/* 背景装饰 */
.hero-bg-shapes {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  overflow: hidden;
}

.shape {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-soft) 0%, transparent 70%);
  animation: float 20s ease-in-out infinite;
}

.shape-1 {
  width: 500px;
  height: 500px;
  top: -200px;
  right: -200px;
  animation-delay: 0s;
}

.shape-2 {
  width: 400px;
  height: 400px;
  bottom: -100px;
  left: -100px;
  animation-delay: 5s;
}

.shape-3 {
  width: 300px;
  height: 300px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: 10s;
}

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

/* ============================================
   内容区域通用样式
   ============================================ */
.content-section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  background: linear-gradient(135deg, #ffffff 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   科学原理区
   ============================================ */
.science-section {
  background: linear-gradient(180deg, var(--color-background-dark) 0%, rgba(26, 35, 126, 0.2) 100%);
}

.formula-box {
  background: rgba(10, 14, 26, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
  backdrop-filter: blur(10px);
}

.formula-box h4 {
  color: var(--color-accent);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
}

.formula {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-accent);
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--color-accent-soft);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-md);
}

.formula-explain {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin: 0;
}

.two-column-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  margin-bottom: var(--spacing-3xl);
}

.content-text h3 {
  font-size: var(--font-size-2xl);
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
}

.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  padding: var(--spacing-sm) 0;
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.feature-list li::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: bold;
  font-size: var(--font-size-lg);
}

.normal-distribution-chart {
  background: linear-gradient(135deg, rgba(15, 22, 41, 0.9) 0%, rgba(10, 14, 26, 0.95) 100%);
  border: 1px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  backdrop-filter: blur(10px);
  box-shadow: 0 0 30px rgba(255, 215, 0, 0.1);
  transition: all 0.3s ease;
}

.normal-distribution-chart:hover {
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 50px rgba(255, 215, 0, 0.2);
}

.distribution-svg .axis {
  stroke: var(--color-text-muted);
  stroke-width: 1.5;
}

.distribution-svg .grid-line {
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 1;
  stroke-dasharray: 5, 5;
}

.normal-curve {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 3;
  stroke-linecap: round;
  filter: drop-shadow(0 0 8px var(--color-glow));
}

.curve-fill {
  fill: url(#curveGradient);
  opacity: 0.6;
}

.sd-area.sd-1 {
  fill: rgba(83, 109, 254, 0.25);
  stroke: rgba(83, 109, 254, 0.5);
  stroke-width: 1;
}

.sd-area.sd-2 {
  fill: rgba(83, 109, 254, 0.08);
  stroke: rgba(83, 109, 254, 0.3);
  stroke-width: 1;
  stroke-dasharray: 4, 4;
}

.mean-line {
  stroke: var(--color-accent);
  stroke-width: 2;
  stroke-dasharray: 6, 4;
  opacity: 0.8;
}

.mean-label {
  font-size: 13px;
  font-weight: 600;
  fill: var(--color-accent);
}

.chart-title {
  font-size: 20px;
  font-weight: 700;
  fill: var(--color-accent);
  filter: drop-shadow(0 0 10px var(--color-glow));
}

.axis-label {
  font-size: 12px;
  fill: var(--color-text-muted);
  font-weight: 500;
}

.iq-label {
  font-size: 13px;
  fill: var(--color-text-light);
  font-weight: 600;
}

.sd-label {
  font-size: 11px;
  fill: rgba(255, 255, 255, 0.6);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  display: inline-block;
}

.legend-color.sd-1 {
  background: rgba(83, 109, 254, 0.3);
  border: 1px solid rgba(83, 109, 254, 0.5);
}

.legend-color.sd-2 {
  background: rgba(83, 109, 254, 0.1);
  border: 1px solid rgba(83, 109, 254, 0.3);
}

.legend-color.mean-color {
  background: transparent;
  border: 2px dashed var(--color-accent);
}

/* 科学指标卡片 */
.science-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-3xl);
}

.metric-card {
  background: rgba(10, 14, 26, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.metric-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(255, 215, 0, 0.2);
  border-color: var(--color-accent);
}

.metric-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-md);
}

.metric-card h4 {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

.metric-value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.metric-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* ============================================
   测试流程区
   ============================================ */
.process-section {
  background: var(--color-background-dark);
}

.process-steps {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-3xl);
}

.step {
  flex: 1;
  min-width: 200px;
  max-width: 280px;
  text-align: center;
  position: relative;
}

.step-number {
  font-size: 72px;
  font-weight: 900;
  color: rgba(255, 215, 0, 0.1);
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 0;
}

.step-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  box-shadow: 0 10px 30px var(--color-glow);
  transition: all var(--transition-base);
}

.step:hover .step-icon {
  transform: scale(1.1);
  box-shadow: 0 15px 40px rgba(255, 215, 0, 0.5);
}

.step-icon img {
  filter: brightness(0) invert(1);
}

.step h3 {
  font-size: var(--font-size-xl);
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
  position: relative;
  z-index: 1;
}

.step p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
  position: relative;
  z-index: 1;
}

.step-duration {
  display: inline-block;
  margin-top: var(--spacing-md);
  padding: 0.5rem 1rem;
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent);
  border-radius: var(--border-radius-2xl);
  font-size: var(--font-size-xs);
  color: var(--color-accent);
  font-weight: 600;
}

.step-connector {
  flex: 0 0 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, transparent 100%);
  margin-top: 80px;
}

/* 移动端隐藏连接线 */
@media (max-width: 768px) {
  .step-connector {
    display: none;
  }
  
  .process-steps {
    flex-direction: column;
    align-items: center;
  }
  
  .step {
    max-width: 100%;
    margin-bottom: var(--spacing-xl);
  }
}

.process-cta .btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, #ffeb3b 100%);
  color: var(--color-primary);
  padding: 1rem 3rem;
  font-size: var(--font-size-xl);
  font-weight: 700;
  border: none;
  box-shadow: 0 10px 40px rgba(255, 215, 0, 0.3);
}

/* ============================================
   用户见证区
   ============================================ */
.testimonials-section {
  background: linear-gradient(180deg, rgba(26, 35, 126, 0.2) 0%, var(--color-background-dark) 100%);
}

.testimonials-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
}

.stat-card {
  background: rgba(10, 14, 26, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(255, 215, 0, 0.2);
}

.stat-icon {
  font-size: 36px;
  margin-bottom: var(--spacing-sm);
}

.stat-card .stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: var(--spacing-xs);
}

.stat-card .stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.testimonial-card {
  background: rgba(10, 14, 26, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.testimonial-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 10px 30px rgba(255, 215, 0, 0.2);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.user-avatar {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-accent);
}

.user-name {
  font-weight: 600;
  color: var(--color-text-light);
}

.user-title {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.testimonial-rating {
  margin-left: auto;
  font-size: var(--font-size-sm);
}

.testimonial-content p {
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

.testimonial-footer {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 215, 0, 0.2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.testimonial-score {
  color: var(--color-accent);
  font-weight: 700;
}

/* ============================================
   特色功能区
   ============================================ */
.features-section {
  background: var(--color-background-dark);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

.feature-card {
  background: rgba(10, 14, 26, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-accent);
  box-shadow: 0 15px 40px rgba(255, 215, 0, 0.2);
}

.feature-icon {
  font-size: 56px;
  margin-bottom: var(--spacing-md);
}

.feature-card h3 {
  font-size: var(--font-size-2xl);
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
}

.feature-card > p {
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
}

.feature-card .feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-card .feature-list li {
  padding: var(--spacing-xs) 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.feature-card .feature-list li::before {
  content: '→';
  color: var(--color-accent);
  font-weight: bold;
}

/* 三栏卡片布局 */
.feature-cards-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: var(--spacing-xl);
  align-items: stretch;
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-2xl) 0;
}

/* 通用卡片样式 */
.feature-card {
  display: flex;
  flex-direction: column;
  background: linear-gradient(135deg, rgba(15, 22, 41, 0.95) 0%, rgba(10, 14, 26, 0.98) 100%);
  border: 1px solid rgba(255, 215, 0, 0.3);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  backdrop-filter: blur(15px);
  box-shadow: 0 0 30px rgba(255, 215, 0, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

.feature-card:hover {
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 50px rgba(255, 215, 0, 0.15);
  transform: translateY(-5px);
}

/* 卡片头部 */
.card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 215, 0, 0.2);
}

.card-icon {
  font-size: 28px;
}

.card-header h4 {
  font-size: var(--font-size-xl);
  color: var(--color-accent);
  margin: 0;
  text-shadow: 0 0 15px var(--color-glow);
}

/* 卡片内容 */
.card-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* 特点列表 */
.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: rgba(255, 215, 0, 0.05);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 215, 0, 0.1);
  transition: all 0.3s ease;
}

.feature-list li:hover {
  background: rgba(255, 215, 0, 0.1);
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.15);
  transform: translateX(5px);
}

.feature-badge {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  color: var(--color-bg-dark);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  white-space: nowrap;
  box-shadow: 0 0 10px var(--color-glow);
}

.feature-text {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

/* 统计数据网格 */
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  flex: 1;
  align-content: start;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  background: rgba(255, 215, 0, 0.05);
  border-radius: var(--border-radius-lg);
  border: 1px solid rgba(255, 215, 0, 0.15);
  transition: all 0.3s ease;
}

.stat-item:hover {
  background: rgba(255, 215, 0, 0.12);
  border: 2px solid var(--color-accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 215, 0, 0.2);
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-accent);
  text-shadow: 0 0 15px var(--color-glow);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* 报告示例卡片 */
.report-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: linear-gradient(135deg, rgba(15, 22, 41, 0.95) 0%, rgba(10, 14, 26, 0.98) 100%);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-2xl);
  backdrop-filter: blur(15px);
  box-shadow: 0 0 50px rgba(255, 215, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  box-sizing: border-box;
}

.report-preview-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 215, 0, 0.3);
  width: 100%;
}

.report-icon {
  font-size: 28px;
}

.report-preview h4 {
  font-size: var(--font-size-xl);
  color: var(--color-accent);
  margin: 0;
  text-shadow: 0 0 15px var(--color-glow);
}

.report-sample {
  width: 100%;
}

.report-header-sample {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.iq-score-display {
  background: var(--color-accent-soft);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  display: inline-block;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.25);
}

.score-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
}

.score-value {
  font-size: 48px;
  font-weight: 800;
  color: var(--color-accent);
  text-shadow: 0 0 20px var(--color-glow);
}

.score-percentile {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-top: var(--spacing-xs);
}

.report-dimensions {
  text-align: left;
}

.dimension-item {
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.dimension-name {
  flex: 0 0 70px;
  font-size: 12px;
  color: var(--color-text-light);
}

.dimension-bar {
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}

.dimension-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent) 0%, #ffeb3b 100%);
  border-radius: var(--border-radius-sm);
  transition: width 1s ease-out;
}

.dimension-score {
  flex: 0 0 50px;
  text-align: right;
  font-size: 11px;
  color: var(--color-accent);
  font-weight: 600;
}

/* ============================================
   FAQ区域
   ============================================ */
.faq-section {
  background: linear-gradient(180deg, var(--color-background-dark) 0%, rgba(26, 35, 126, 0.2) 100%);
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: rgba(10, 14, 26, 0.8);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing-md);
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item[open] {
  border-color: var(--color-accent);
  box-shadow: 0 10px 30px rgba(255, 215, 0, 0.2);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-xl);
  cursor: pointer;
  list-style: none;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-light);
  transition: all var(--transition-base);
}

.faq-question:hover {
  color: var(--color-accent);
}

.faq-question::-webkit-details-marker {
  display: none;
}

.question-text {
  flex: 1;
}

.question-icon {
  font-size: var(--font-size-2xl);
  color: var(--color-accent);
  transition: transform var(--transition-base);
}

.faq-item[open] .question-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 var(--spacing-xl) var(--spacing-xl);
  color: var(--color-text-light);
  line-height: var(--line-height-relaxed);
}

.faq-answer p,
.faq-answer ul {
  margin-bottom: var(--spacing-md);
}

.faq-answer ul {
  padding-left: var(--spacing-xl);
}

.faq-answer li {
  margin-bottom: var(--spacing-sm);
}

.faq-answer strong {
  color: var(--color-accent);
}

/* ============================================
   最终CTA区域
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, #536dfe 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

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

.cta-section h2 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: #ffffff;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.cta-section > .container > .cta-content > p {
  font-size: var(--font-size-xl);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-2xl);
}

.cta-benefits {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.benefit {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-base);
  color: #ffffff;
}

.benefit-icon {
  color: var(--color-accent);
  font-weight: bold;
  font-size: var(--font-size-xl);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.cta-buttons .btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, #ffeb3b 100%);
  color: var(--color-primary);
  padding: 1.25rem 3rem;
  font-size: var(--font-size-xl);
  font-weight: 700;
  border: none;
  box-shadow: 0 10px 40px rgba(255, 215, 0, 0.5);
}

.cta-buttons .btn-secondary {
  background: transparent;
  color: #ffffff;
  border: 2px solid #ffffff;
  padding: 1.25rem 2.5rem;
  font-size: var(--font-size-xl);
}

.cta-buttons .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.cta-section .cta-note {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   页脚
   ============================================ */
.footer {
  background: var(--color-background-dark);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
  margin-bottom: var(--spacing-2xl);
}

.footer-brand {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-md);
}

.footer-brand img {
  filter: drop-shadow(0 0 10px var(--color-glow));
  flex-shrink: 0;
}

.footer-brand-text {
  display: flex;
  flex-direction: column;
  padding-right: 20px;
}

.footer-brand-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.3;
}

.footer-tagline {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.footer-brand p {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.3;
}

.footer-tagline {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-base);
}

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

.footer-contact {
  text-align: center;
}

.footer-qrcode-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.footer-qrcode-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  letter-spacing: 1px;
  margin: 0;
}

.footer-qrcode {
  padding: 8px;
  background: #fff;
  border-radius: var(--border-radius-md);
  box-shadow: 0 0 20px rgba(212, 165, 116, 0.15);
}

.footer-qrcode img {
  display: block;
}

.footer-qrcode-name {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-light);
  margin: 0;
}

.footer-contact p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 215, 0, 0.2);
}

.footer-bottom-qrcodes {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-bottom-slogan {
  text-align: center;
}

.footer-bottom-slogan p {
  font-size: 30px;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 2px;
  margin: 0;
}

.footer-bottom-info {
  text-align: center;
}

.footer-bottom-info p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: var(--spacing-xs) 0;
}

.footer-icp a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-icp a:hover {
  color: var(--color-text-light);
  text-decoration: underline;
}

/* ============================================
   响应式调整
   ============================================ */
@media (max-width: 992px) {
  .two-column-layout {
    grid-template-columns: 1fr;
  }
  
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .iq-gauge {
    width: 280px;
    height: auto;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .gauge-info {
    position: static;
    transform: none;
    bottom: auto;
    left: auto;
    margin-top: 0.75rem;
    width: auto;
    max-width: 280px;
  }
  
  .gauge-info p {
    font-size: 0.9rem;
    white-space: nowrap;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .trust-badges {
    justify-content: center;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    text-align: center;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-title .highlight {
    font-size: 1.5rem;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-lg);
  }
  
  /* 仪表盘移动端：info移出仪表盘，改为正常文档流 */
  .iq-gauge {
    width: 260px;
    height: auto;
    min-height: 260px;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .gauge-info {
    position: static;
    transform: none;
    bottom: auto;
    left: auto;
    margin-top: 0.75rem;
    width: auto;
    max-width: 260px;
    white-space: nowrap;
  }
  
  .gauge-info p {
    font-size: 0.95rem;
    white-space: nowrap;
  }
  
  .step {
    min-width: 100%;
  }
  
  .features-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-section h2 {
    font-size: var(--font-size-3xl);
  }
  
  .cta-buttons {
    flex-direction: column;
  }
  
  .cta-buttons .btn {
    width: 100%;
  }
}

@media (max-width: 576px) {
  .hero-title {
    font-size: 2rem;
  }
  
  /* 超小屏仪表盘 */
  .iq-gauge {
    width: 220px;
    height: auto;
    min-height: 220px;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .gauge-value {
    font-size: 36px;
  }
  
  .gauge-label {
    font-size: 12px;
  }
  
  .gauge-info {
    padding: 0.5rem 1rem;
    max-width: 220px;
  }
  
  .gauge-info p {
    font-size: 0.85rem;
    white-space: normal;
    line-height: 1.5;
  }
  
  .stat-number {
    font-size: var(--font-size-3xl);
  }
  
  .section-header h2 {
    font-size: var(--font-size-3xl);
  }
  
  .faq-question {
    font-size: var(--font-size-base);
  }
}