/* 一云梯 1yunti - 现代化高端科技落地页样式 */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-rgb: 37, 99, 235;
  --accent: #6366f1;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #4f46e5 50%, #7c3aed 100%);
  --bg-gradient: radial-gradient(120% 120% at 50% 0%, rgba(238, 242, 255, 0.8) 0%, rgba(248, 250, 252, 1) 100%);
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-sub: #334155;
  --border: #e2e8f0;
  --border-focus: #bfdbfe;
  --success: #10b981;
  --success-bg: #ecfdf5;
  --warning: #f59e0b;
  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.05), 0 2px 8px -2px rgba(0, 0, 0, 0.03);
  --card-hover-shadow: 0 20px 40px -15px rgba(37, 99, 235, 0.12), 0 0 1px 1px rgba(37, 99, 235, 0.1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: light;
}

body {
  font-family: var(--font-family);
  background-color: #fafbfc;
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* 动态背景画布 */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.75;
}

/* 顶部流光氛围光斑 */
.ambient-glow {
  position: absolute;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 550px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(37, 99, 235, 0.08) 40%, rgba(255, 255, 255, 0) 70%);
  filter: blur(60px);
  z-index: 0;
  pointer-events: none;
}

.ambient-glow-2 {
  position: absolute;
  top: 1400px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
}

/* 页面主要容器 */
.page-wrapper {
  position: relative;
  z-index: 1;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部通知条 */
.top-notice-bar {
  background: linear-gradient(90deg, #1e3a8a, #2563eb, #4338ca);
  color: #ffffff;
  padding: 9px 16px;
  font-size: 0.86rem;
  text-align: center;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  z-index: 50;
}

.top-notice-bar .badge-fire {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.top-notice-bar a {
  color: #fef08a;
  text-decoration: underline;
  margin-left: 6px;
  font-weight: 600;
  transition: opacity 0.2s;
}

.top-notice-bar a:hover {
  opacity: 0.85;
}

/* 导航栏 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: all 0.3s ease;
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon-svg {
  width: 38px;
  height: 38px;
  fill: none;
}

.logo-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #0f172a;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-en {
  font-size: 0.88rem;
  font-weight: 600;
  color: #64748b;
  font-family: inherit;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-links a {
  color: #475569;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  transition: color 0.2s ease;
  padding: 6px 0;
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.25s ease;
  border-radius: 2px;
}

.nav-links a:hover::after {
  width: 100%;
}

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

.btn-nav-login {
  color: #2563eb;
  border: 1.5px solid #bfdbfe;
  padding: 7px 18px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  background: #ffffff;
}

.btn-nav-login:hover {
  border-color: #2563eb;
  background: #eff6ff;
  color: #1d4ed8;
}

.btn-nav-register {
  background: var(--accent-gradient);
  color: #ffffff;
  padding: 8px 22px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-nav-register:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: #0f172a;
}

/* 按钮基础类 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  padding: 14px 30px;
  box-shadow: 0 8px 24px -4px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -4px rgba(37, 99, 235, 0.5);
  color: #ffffff;
}

.btn-secondary {
  background: #ffffff;
  color: #2563eb;
  border: 1.5px solid #bfdbfe;
  padding: 13px 28px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.btn-secondary:hover {
  background: #eff6ff;
  border-color: #2563eb;
  color: #1d4ed8;
  transform: translateY(-2px);
}

.btn-pulse {
  position: relative;
  overflow: hidden;
}

.btn-pulse::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(60deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: rotate(30deg);
  animation: shine 4s infinite;
}

@keyframes shine {
  0% { transform: translateX(-150%) rotate(30deg); }
  30%, 100% { transform: translateX(150%) rotate(30deg); }
}

/* 板块通用头部 */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  background: #eff6ff;
  color: #2563eb;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 14px;
  border: 1px solid #dbeafe;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #0f172a;
  margin-bottom: 14px;
  line-height: 1.25;
}

.section-subtitle {
  font-size: 1.05rem;
  color: #64748b;
  line-height: 1.6;
}

/* 板块外边距 */
.section-padding {
  padding: 96px 0;
  position: relative;
}

/* ================== 1. HERO 首屏 ================== */
.hero-section {
  padding: 70px 0 90px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 50px;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: #334155;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.18;
  color: #0f172a;
  margin-bottom: 20px;
}

.hero-title .brand-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-lead {
  font-size: 1.25rem;
  color: #334155;
  font-weight: 500;
  margin-bottom: 12px;
  line-height: 1.5;
}

.hero-description {
  font-size: 1.05rem;
  color: #64748b;
  margin-bottom: 34px;
  max-width: 580px;
  line-height: 1.68;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-trust-badges {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-top: 18px;
  border-top: 1px solid #edf2f7;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 7px;
  color: #475569;
  font-size: 0.88rem;
  font-weight: 500;
}

.trust-item svg {
  color: #2563eb;
  flex-shrink: 0;
}

/* Hero 右侧动态交互卡片 */
.hero-visual {
  position: relative;
  z-index: 2;
}

.hero-glass-card {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: 0 25px 60px -15px rgba(37, 99, 235, 0.15), 0 0 1px 1px rgba(226, 232, 240, 0.8);
  position: relative;
}

.card-decor-circle {
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(37, 99, 235, 0.1));
  border-radius: 50%;
  filter: blur(20px);
  z-index: -1;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid #f1f5f9;
  margin-bottom: 20px;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot-red { width: 10px; height: 10px; border-radius: 50%; background: #ef4444; }
.dot-yellow { width: 10px; height: 10px; border-radius: 50%; background: #f59e0b; }
.dot-green { width: 10px; height: 10px; border-radius: 50%; background: #10b981; }

.terminal-badge {
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: #ecfdf5;
  color: #059669;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 5px;
}

.speed-meter-box {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.speed-meter-box::after {
  content: '';
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.4) 0%, transparent 70%);
  border-radius: 50%;
}

.meter-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #94a3b8;
  margin-bottom: 8px;
}

.meter-speed-val {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1;
  color: #38bdf8;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.meter-speed-val span {
  font-size: 1rem;
  color: #94a3b8;
  font-weight: 500;
}

.meter-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-small-item .lbl {
  font-size: 0.72rem;
  color: #94a3b8;
}

.stat-small-item .val {
  font-size: 0.95rem;
  font-weight: 700;
  color: #f1f5f9;
}

.hero-node-preview {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hero-node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 500;
}

.node-info-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-flag {
  font-size: 1.1rem;
}

.ping-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  font-weight: 700;
  color: #059669;
  background: #ecfdf5;
  padding: 2px 8px;
  border-radius: 6px;
}

/* ================== 2. 核心优势板块 ================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-hover-shadow);
  border-color: #bfdbfe;
}

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: #eff6ff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: #2563eb;
  transition: all 0.3s ease;
}

.feature-card:hover .feature-icon-wrapper {
  background: var(--accent-gradient);
  color: #ffffff;
  transform: scale(1.08);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
}

.feature-card p {
  color: #64748b;
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ================== 3. 节点延迟与状态板块 ================== */
.nodes-section {
  background: #ffffff;
  border-top: 1px solid #f1f5f9;
  border-bottom: 1px solid #f1f5f9;
}

.region-tabs-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.region-tab-btn {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  color: #334155;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.region-tab-btn:hover, .region-tab-btn.active {
  background: #eff6ff;
  border-color: #2563eb;
  color: #2563eb;
  transform: translateY(-1px);
}

.nodes-table-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  margin-bottom: 32px;
}

.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  padding: 24px;
}

.node-card-item {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.2s ease;
}

.node-card-item:hover {
  background: #ffffff;
  border-color: #93c5fd;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.08);
}

.node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.node-title-group .name {
  font-weight: 700;
  font-size: 0.96rem;
  color: #1e293b;
}

.node-protocol-tag {
  font-size: 0.72rem;
  padding: 2px 6px;
  background: #e0e7ff;
  color: #4338ca;
  border-radius: 4px;
  font-weight: 600;
}

.node-body {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid #edf2f7;
  font-size: 0.85rem;
}

.node-status-live {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #059669;
  font-weight: 600;
}

.status-beacon {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
}

.node-latency-pill {
  font-family: monospace;
  font-weight: 700;
  color: #0284c7;
  background: #e0f2fe;
  padding: 3px 8px;
  border-radius: 6px;
}

/* 节点性能大盘指标 */
.metrics-banner {
  background: linear-gradient(135deg, #f8fafc 0%, #eff6ff 100%);
  border: 1px solid #dbeafe;
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.metric-col h4 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #1d4ed8;
  margin-bottom: 4px;
  letter-spacing: -0.5px;
}

.metric-col p {
  color: #64748b;
  font-size: 0.92rem;
  font-weight: 500;
}

/* 客户端支持栏 */
.clients-support-box {
  margin-top: 40px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 28px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.clients-desc h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 6px;
}

.clients-desc p {
  font-size: 0.92rem;
  color: #64748b;
}

.clients-pills {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.client-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: #f1f5f9;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: #334155;
}

/* ================== 4. 套餐价格板块 ================== */
.pricing-section {
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: #ffffff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--card-shadow);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--card-hover-shadow);
}

.pricing-card.featured {
  border-color: #2563eb;
  box-shadow: 0 16px 40px -10px rgba(37, 99, 235, 0.2), 0 0 0 2px #2563eb;
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.plan-type-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  background: #f1f5f9;
  color: #475569;
  margin-bottom: 12px;
  width: fit-content;
}

.pricing-card.featured .plan-type-tag {
  background: #eff6ff;
  color: #2563eb;
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.92rem;
  color: #64748b;
  margin-bottom: 24px;
  min-height: 44px;
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid #f1f5f9;
}

.currency {
  font-size: 1.6rem;
  font-weight: 800;
  color: #0f172a;
}

.amount {
  font-size: 3.2rem;
  font-weight: 900;
  letter-spacing: -1.5px;
  color: #0f172a;
  line-height: 1;
}

.billing-cycle {
  font-size: 1rem;
  color: #64748b;
  font-weight: 500;
}

.plan-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.plan-features-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.94rem;
  color: #334155;
}

.plan-features-list li svg {
  color: #10b981;
  flex-shrink: 0;
}

.btn-pricing-action {
  width: 100%;
  padding: 14px 20px;
  font-size: 1rem;
}

/* ================== 5. 常见问题板块 FAQ ================== */
.faq-section {
  background: #f8fafc;
}

.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-item:hover {
  border-color: #cbd5e1;
}

.faq-item.active {
  border-color: #93c5fd;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.06);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  font-weight: 700;
  font-size: 1.05rem;
  color: #0f172a;
}

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: #64748b;
  flex-shrink: 0;
}

.faq-item.active .faq-icon-arrow {
  transform: rotate(180deg);
  color: #2563eb;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
  color: #475569;
  font-size: 0.96rem;
  line-height: 1.7;
}

.faq-answer-inner {
  padding: 0 24px 22px;
}

/* ================== 6. 知识库与教程板块 ================== */
.knowledge-section {
  position: relative;
}

.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 28px;
}

.knowledge-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  color: inherit;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

.knowledge-card:hover {
  transform: translateY(-5px);
  border-color: #93c5fd;
  box-shadow: var(--card-hover-shadow);
}

.card-top-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.article-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: #eff6ff;
  color: #2563eb;
}

.article-read-time {
  font-size: 0.8rem;
  color: #94a3b8;
  display: flex;
  align-items: center;
  gap: 4px;
}

.knowledge-card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
  line-height: 1.45;
  transition: color 0.2s ease;
}

.knowledge-card:hover h3 {
  color: var(--primary);
}

.knowledge-card p {
  font-size: 0.92rem;
  color: #64748b;
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-keywords-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.kw-pill {
  font-size: 0.75rem;
  background: #f1f5f9;
  color: #475569;
  padding: 2px 8px;
  border-radius: 4px;
}

.read-more-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #2563eb;
  font-weight: 600;
  font-size: 0.92rem;
  transition: gap 0.2s ease;
}

.knowledge-card:hover .read-more-link {
  gap: 10px;
}

/* ================== 7. 用户评价板块 ================== */
.reviews-section {
  background: #ffffff;
  border-top: 1px solid #f1f5f9;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 26px;
}

.review-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.review-card:hover {
  background: #ffffff;
  border-color: #cbd5e1;
  box-shadow: var(--card-hover-shadow);
  transform: translateY(-4px);
}

.review-stars {
  color: #f59e0b;
  display: flex;
  gap: 3px;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.review-quote {
  font-size: 0.96rem;
  color: #334155;
  line-height: 1.68;
  margin-bottom: 22px;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid #e2e8f0;
}

.avatar-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  color: #ffffff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.author-meta .name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #0f172a;
}

.author-meta .role {
  font-size: 0.8rem;
  color: #64748b;
}

/* ================== 底部 CTA 强化横幅 ================== */
.bottom-cta-banner {
  padding: 70px 0;
  position: relative;
}

.cta-box-gradient {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #4338ca 100%);
  border-radius: 24px;
  padding: 56px 40px;
  color: #ffffff;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px -10px rgba(37, 99, 235, 0.4);
}

.cta-box-gradient h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.cta-box-gradient p {
  font-size: 1.15rem;
  max-width: 650px;
  margin: 0 auto 36px;
  color: #e0e7ff;
}

.cta-box-gradient .btn-white {
  background: #ffffff;
  color: #1e3a8a;
  padding: 16px 36px;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.cta-box-gradient .btn-white:hover {
  background: #f8fafc;
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

/* ================== 页脚 FOOTER ================== */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 70px 0 35px;
  font-size: 0.92rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
  gap: 50px;
  margin-bottom: 50px;
}

.footer-brand .brand-name-f {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand p {
  line-height: 1.65;
  margin-bottom: 20px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links-list a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links-list a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

.footer-bottom p {
  color: #64748b;
}

/* ================== 文章独立页面样式 (Guides) ================== */
.article-page {
  padding: 60px 0 100px;
}

.article-header-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 36px;
  box-shadow: var(--card-shadow);
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: #64748b;
}

.article-title-main {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.3;
  color: #0f172a;
  margin-bottom: 20px;
}

.article-content-body {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--card-shadow);
  color: #334155;
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-content-body h2 {
  font-size: 1.6rem;
  color: #0f172a;
  margin: 36px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid #edf2f7;
  font-weight: 700;
}

.article-content-body h3 {
  font-size: 1.25rem;
  color: #1e293b;
  margin: 28px 0 12px;
  font-weight: 600;
}

.article-content-body p {
  margin-bottom: 20px;
}

.article-content-body ul, .article-content-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-content-body li {
  margin-bottom: 8px;
}

.article-cta-box {
  background: linear-gradient(135deg, #eff6ff 0%, #e0e7ff 100%);
  border: 1px solid #bfdbfe;
  border-radius: 16px;
  padding: 30px;
  margin: 36px 0;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.35rem;
  color: #1e3a8a;
  margin-bottom: 10px;
  border: none;
  padding: 0;
}

.article-cta-box p {
  color: #3b82f6;
  margin-bottom: 20px;
}

/* ================== 响应式适配 ================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .metrics-banner {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    padding: 24px;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    gap: 18px;
  }
  .nav-links.active {
    display: flex;
  }
  .menu-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.3rem;
  }
  .section-title {
    font-size: 1.85rem;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .article-content-body {
    padding: 24px 20px;
  }
  .article-header-card {
    padding: 24px 20px;
  }
  .article-title-main {
    font-size: 1.65rem;
  }
  .metrics-banner {
    grid-template-columns: 1fr 1fr;
    padding: 24px 16px;
  }
}