/* ===== CSS Variables ===== */
:root {
  --primary: #1677ff;
  --primary-dark: #0958d9;
  --primary-light: #4096ff;
  --primary-bg: #e6f4ff;
  --text-primary: #1d2129;
  --text-secondary: #4e5969;
  --text-muted: #86909c;
  --border: #e5e6eb;
  --bg-page: #f7f8fa;
  --bg-white: #ffffff;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(22, 119, 255, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --header-height: 72px;
  --max-width: 1200px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text-primary);
  background: var(--bg-page);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  --logo-w: 130px;
}

.header-brand a.logo-link {
  display: block;
  flex-shrink: 0;
  line-height: 0;
}

.header-brand .logo-img {
  width: var(--logo-w);
  height: auto;
  flex-shrink: 0;
  display: block;
}

.header-brand .brand-title {
  font-size: calc(var(--logo-w) * 0.185);
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  letter-spacing: 0.5px;
  line-height: 1;
  align-self: center;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: block;
  padding: 8px 20px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: all var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--primary-bg);
}

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

.btn-demo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
  white-space: nowrap;
}

.btn-demo:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(22, 119, 255, 0.4);
}

.btn-demo svg {
  width: 16px;
  height: 16px;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Main Content ===== */
.main-content {
  padding-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, #f0f5ff 0%, #e6f4ff 50%, #f7f8fa 100%);
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(22, 119, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(22, 119, 255, 0.05) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: #52c41a;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(22, 119, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(22, 119, 255, 0.4);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--bg-white);
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  border-radius: 10px;
  border: 2px solid var(--primary);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-outline:hover {
  background: var(--primary-bg);
}

.hero-visual {
  position: relative;
}

.hero-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.stat-item {
  text-align: center;
  padding: 16px;
  background: var(--bg-page);
  border-radius: var(--radius);
}

.stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
}

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

/* ===== Section Common ===== */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  padding: 4px 16px;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===== Feature Cards (Home) ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--primary-bg);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 28px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Dual Architecture ===== */
.arch-section {
  background: var(--bg-white);
}

.arch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.arch-card {
  background: var(--bg-page);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.arch-card:hover {
  box-shadow: var(--shadow-md);
}

.arch-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.arch-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}

.arch-icon.mobile {
  background: linear-gradient(135deg, #e6f4ff, #bae0ff);
}

.arch-icon.admin {
  background: linear-gradient(135deg, #f6ffed, #d9f7be);
}

.arch-card h3 {
  font-size: 24px;
  font-weight: 700;
}

.arch-card .subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.arch-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.arch-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.arch-list li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== Scenarios ===== */
.section-scenarios {
  background: var(--bg-white);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.scenario-item {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.scenario-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: scaleX(0);
  transition: transform var(--transition);
}

.scenario-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
}

.scenario-item:hover::after {
  transform: scaleX(1);
}

.scenario-icon-wrap {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, #f0f5ff 0%, #e6f4ff 100%);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.scenario-item:hover .scenario-icon-wrap {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  transform: scale(1.05);
}

.scenario-icon {
  font-size: 36px;
  line-height: 1;
  transition: transform var(--transition);
}

.scenario-icon-img {
  width: 40px;
  height: 40px;
  transition: transform var(--transition);
}

.scenario-item:hover .scenario-icon-img {
  transform: scale(1.1);
}

.scenario-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

/* ===== Process Flow ===== */
.section-process {
  background: linear-gradient(180deg, var(--bg-page) 0%, var(--bg-white) 100%);
}

.process-flow {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}

.process-steps-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.process-step-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 28px 16px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
}

.process-step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.process-step-card .process-step-num {
  width: 44px;
  height: 44px;
  margin: 0 auto 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

.process-step-card h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.process-step-card p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.process-flow img {
  width: 100%;
  min-width: 700px;
}

.process-mobile {
  display: none;
  flex-direction: column;
  gap: 0;
}

.process-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 0;
  position: relative;
}

.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 19px;
  top: 52px;
  bottom: -20px;
  width: 2px;
  background: var(--border);
}

.process-step-num {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

.process-step-body h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.process-step-body p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Metrics Strip ===== */
.metrics-strip {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 48px 0;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.metric-item .metric-num {
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 8px;
}

.metric-item .metric-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

.metric-item .metric-desc {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 4px;
}

/* ===== Feature Icon (SVG) ===== */
.feature-icon-img {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
}

.feature-card .feature-num {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 48px;
  font-weight: 800;
  color: var(--primary-bg);
  line-height: 1;
  pointer-events: none;
}

/* ===== Architecture Visual ===== */
.arch-visual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}

.arch-visual-card {
  background: var(--bg-page);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--border);
  text-align: center;
  transition: all var(--transition);
}

.arch-visual-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.arch-visual-card img {
  width: 100%;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.arch-visual-card h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.arch-visual-card p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Advantages ===== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-item {
  text-align: center;
  padding: 32px 20px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.advantage-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: var(--primary-bg);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.advantage-icon svg {
  width: 32px;
  height: 32px;
}

.advantage-item h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.advantage-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Hero Image ===== */
.hero-img-wrap {
  position: relative;
}

.hero-img-wrap img,
.hero-img-wrap object.illustration-img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.illustration-img {
  width: 100%;
  max-width: 100%;
  display: block;
  pointer-events: none;
}

.arch-visual-card .illustration-img,
.arch-visual-card object.illustration-img {
  width: 100%;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.hero-float-card {
  position: absolute;
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 12px 20px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: float 3s ease-in-out infinite;
}

.hero-float-card.card-1 {
  top: 20px;
  left: -20px;
}

.hero-float-card.card-2 {
  bottom: 40px;
  right: -10px;
  animation-delay: 1.5s;
}

.hero-float-card .dot-green {
  width: 10px;
  height: 10px;
  background: #52c41a;
  border-radius: 50%;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ===== Feature Visual Image ===== */
.feature-visual {
  background: linear-gradient(145deg, #eef4ff 0%, #f8faff 50%, #f0f5ff 100%);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid rgba(22, 119, 255, 0.08);
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8), 0 4px 24px rgba(22, 119, 255, 0.06);
  transition: all var(--transition);
}

.feature-block:hover .feature-visual {
  border-color: rgba(22, 119, 255, 0.15);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8), 0 8px 32px rgba(22, 119, 255, 0.1);
}

.feature-visual img,
.feature-visual object.illustration-img {
  width: 100%;
  max-width: 480px;
  height: auto;
  border-radius: var(--radius);
  display: block;
}

.feature-visual svg {
  width: 100%;
  max-width: 480px;
}

/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Pricing Compare ===== */
.pricing-compare {
  margin-top: 60px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
}

.pricing-compare h3 {
  padding: 24px 32px;
  font-size: 20px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  background: var(--bg-page);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
}

.compare-table th,
.compare-table td {
  padding: 16px 24px;
  text-align: center;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}

.compare-table th {
  background: var(--bg-page);
  font-weight: 600;
  color: var(--text-primary);
}

.compare-table th:first-child,
.compare-table td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--text-secondary);
}

.compare-table td.check {
  color: var(--primary);
  font-weight: 700;
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.pricing-compare {
  overflow-x: auto;
}

.compare-table {
  min-width: 600px;
}

.page-hero {
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(22, 119, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

/* ===== CTA Section ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 80px 0;
  text-align: center;
  color: #fff;
}

.cta-section .section-title {
  color: #fff;
}

.cta-section .section-desc {
  color: rgba(255, 255, 255, 0.85);
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 36px;
  flex-wrap: wrap;
}

.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: #fff;
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 10px;
  border: 2px solid rgba(255, 255, 255, 0.6);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

/* ===== Footer ===== */
.site-footer {
  background: #1d2129;
  color: rgba(255, 255, 255, 0.65);
  padding: 48px 0 24px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .footer-logo-wrap {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  text-decoration: none;
}

.footer-brand .footer-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  flex-shrink: 0;
}

.footer-brand .footer-brand-text {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
  line-height: 1;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
}

/* ===== Features Page ===== */
.page-hero {
  background: linear-gradient(135deg, #f0f5ff 0%, #e6f4ff 100%);
  padding: 60px 0;
  text-align: center;
}

.page-hero .section-title {
  font-size: 40px;
}

.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 60px 0;
}

.feature-block:nth-child(even) {
  direction: rtl;
}

.feature-block:nth-child(even) > * {
  direction: ltr;
}

.feature-block + .feature-block {
  border-top: 1px solid var(--border);
}

.feature-text .block-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.feature-text h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-text h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 20px;
}

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

.feature-text ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.feature-text ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text-secondary);
}

.feature-text ul li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 8px;
}

/* feature-visual styles defined above in Feature Visual Image section */

/* ===== Pricing Page ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  border: 2px solid var(--border);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured::before {
  content: '推荐';
  position: absolute;
  top: -1px;
  right: 24px;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 0 0 8px 8px;
}

.pricing-name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.pricing-price {
  margin-bottom: 8px;
}

.pricing-price .amount {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.pricing-price .currency {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  vertical-align: super;
}

.pricing-price .period {
  font-size: 14px;
  color: var(--text-muted);
}

.pricing-note {
  font-size: 13px;
  color: var(--text-muted);
  padding: 12px 16px;
  background: var(--bg-page);
  border-radius: 8px;
  margin-bottom: 24px;
  line-height: 1.6;
}

.pricing-features {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.pricing-features li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
}

.pricing-btn {
  display: block;
  text-align: center;
  padding: 14px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.pricing-btn.primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

.pricing-btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(22, 119, 255, 0.4);
}

.pricing-btn.outline {
  background: var(--bg-white);
  color: var(--primary);
  border: 2px solid var(--primary);
}

.pricing-btn.outline:hover {
  background: var(--primary-bg);
}

.pricing-faq {
  margin-top: 80px;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  transition: background var(--transition);
}

.faq-question:hover {
  background: var(--bg-page);
}

.faq-question .arrow {
  transition: transform var(--transition);
  color: var(--text-muted);
}

.faq-item.open .faq-question .arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}

.faq-item.open .faq-answer {
  max-height: 200px;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Guide Page ===== */
.guide-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  padding: 40px 0 80px;
  min-height: calc(100vh - var(--header-height) - 200px);
}

.guide-sidebar {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 24px 0;
  height: fit-content;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.guide-sidebar h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0 24px;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.guide-nav-item {
  display: block;
  padding: 12px 24px;
  font-size: 15px;
  color: var(--text-secondary);
  border-left: 3px solid transparent;
  transition: all var(--transition);
}

.guide-nav-item:hover {
  color: var(--primary);
  background: var(--primary-bg);
}

.guide-nav-item.active {
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--primary);
  background: var(--primary-bg);
}

.guide-content {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 48px;
}

.guide-content h1 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
}

.guide-content .guide-meta {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.guide-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--text-primary);
}

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

.guide-content ul {
  margin: 16px 0;
  padding-left: 0;
}

.guide-content ul li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  line-height: 1.6;
}

.guide-content ul li::before {
  content: '•';
  color: var(--primary);
  font-weight: 700;
}

.guide-placeholder {
  text-align: center;
  padding: 80px 40px;
  color: var(--text-muted);
}

.guide-placeholder .icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  opacity: 0.5;
}

.guide-placeholder .icon svg {
  width: 100%;
  height: 100%;
}

.guide-placeholder h2 {
  font-size: 24px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.guide-placeholder p {
  font-size: 15px;
  max-width: 400px;
  margin: 0 auto;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-title {
    font-size: 36px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .arch-grid {
    grid-template-columns: 1fr;
  }

  .scenarios-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .arch-visual-grid {
    grid-template-columns: 1fr;
  }

  .process-steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-mobile {
    display: flex;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .feature-block:nth-child(even) {
    direction: ltr;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .menu-toggle {
    display: flex;
  }

  .header-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    flex-direction: column;
    gap: 12px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
    box-shadow: var(--shadow-md);
  }

  .header-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
  }

  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
  }

  .btn-demo {
    width: 100%;
    justify-content: center;
  }

  .header-brand {
    --logo-w: 100px;
  }

  .header-brand .logo-img {
    width: var(--logo-w);
  }

  .hero {
    padding: 48px 0 60px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }

  .hero-float-card {
    display: none;
  }

  .process-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .guide-layout {
    grid-template-columns: 1fr;
  }

  .guide-sidebar {
    position: static;
  }

  .guide-content {
    padding: 24px;
  }

  .feature-text h2 {
    font-size: 24px;
  }

  .page-hero .section-title {
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  .header-brand {
    gap: 8px;
  }

  .header-brand {
    --logo-w: 80px;
  }

  .header-brand .logo-img {
    width: var(--logo-w);
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn-primary, .btn-outline {
    width: 100%;
    justify-content: center;
  }

  .scenarios-grid {
    grid-template-columns: 1fr 1fr;
  }
}