/* ============================================================
   AIsage - 全过程工程咨询AI工作台 品牌官网
   设计风格: CodeBuddy深色科技风
   主色调: 科技蓝 #4d9fff + 深空背景 #0a0a10
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --primary: #4d9fff;
  --primary-glow: rgba(77, 159, 255, 0.4);
  --primary-soft: rgba(77, 159, 255, 0.08);
  --primary-border: rgba(77, 159, 255, 0.2);
  --accent: #6ee7b7;
  --accent-glow: rgba(110, 231, 183, 0.3);
  --bg-base: #0a0a10;
  --bg-elevated: #111118;
  --bg-card: rgba(17, 17, 24, 0.7);
  --bg-card-hover: rgba(22, 22, 34, 0.85);
  --bg-nav: rgba(10, 10, 16, 0.8);
  --text-primary: #f0f0f5;
  --text-secondary: rgba(240, 240, 245, 0.7);
  --text-muted: rgba(240, 240, 245, 0.45);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-card: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(77, 159, 255, 0.15);
  --success: #34d399;
  --warning: #fbbf24;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --max-width: 1240px;
  --nav-height: 68px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-glow: 0 0 40px rgba(77, 159, 255, 0.1);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.5), 0 0 60px rgba(77, 159, 255, 0.08);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary);
  background: var(--bg-base);
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; outline: none; font-family: inherit; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2.5px;
  margin-bottom: 20px;
  padding: 6px 16px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: 20px;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #f0f0f5 0%, #b0b8c8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.05rem;
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 64px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  transition: all var(--transition);
}

.navbar.transparent {
  background: transparent;
}

.navbar.scrolled {
  background: var(--bg-nav);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), #2563eb);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #fff;
  font-weight: 800;
  box-shadow: 0 0 16px var(--primary-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 60%;
}

.nav-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 9px 22px;
  border-radius: 22px;
  font-weight: 600 !important;
  transition: all var(--transition) !important;
  box-shadow: 0 0 20px rgba(77, 159, 255, 0.25);
}

.nav-cta:hover {
  background: #5babff;
  box-shadow: 0 0 30px rgba(77, 159, 255, 0.4);
  transform: translateY(-1px);
}

.nav-cta::after { display: none !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 24px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 0 24px var(--primary-glow);
}

.btn-primary:hover {
  background: #5babff;
  box-shadow: 0 0 36px rgba(77, 159, 255, 0.5);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-card);
}

.btn-outline:hover {
  border-color: var(--primary-border);
  background: var(--primary-soft);
  transform: translateY(-2px);
}

.btn-ghost {
  background: var(--primary-soft);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.btn-ghost:hover {
  background: rgba(77, 159, 255, 0.15);
  transform: translateY(-2px);
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--bg-base);
  position: relative;
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 1000px;
  background: radial-gradient(ellipse, rgba(77, 159, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(77, 159, 255, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

#particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* Background decorative lines */
.hero-bg-lines {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.3;
  background-image:
    linear-gradient(rgba(77, 159, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(77, 159, 255, 0.05) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 880px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: 20px;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 32px;
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.5);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
  font-size: 3.4rem;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -1.5px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--primary) 0%, #6ee7b7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 48px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 56px;
  flex-wrap: wrap;
}

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

.hero-stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.hero-stat-number .plus {
  color: var(--primary);
  font-size: 1.4rem;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ---------- Sections ---------- */
.section {
  padding: 110px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-elevated);
}

/* ---------- Feature Cards ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top left, var(--primary-soft) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card-hover);
}

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

.feature-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  position: relative;
  z-index: 1;
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ---------- Scenario Card (专项债) ---------- */
.scenario-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 56px 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-top: 60px;
  transition: all var(--transition);
}

.scenario-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.scenario-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: 16px;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.scenario-content h3 {
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.scenario-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 24px;
}

.scenario-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.scenario-tag {
  padding: 7px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  color: var(--text-secondary);
  font-size: 0.84rem;
  transition: all var(--transition);
}

.scenario-tag:hover {
  border-color: var(--primary-border);
  color: var(--primary);
}

.scenario-visual {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.scenario-doc-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all var(--transition);
}

.scenario-doc-card:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--primary-border);
  transform: translateX(6px);
}

.scenario-doc-icon {
  width: 42px;
  height: 42px;
  background: var(--primary-soft);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.scenario-doc-info h4 {
  font-size: 0.93rem;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.scenario-doc-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: all var(--transition);
  position: relative;
}

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

.pricing-card.featured::after {
  content: '推荐';
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 14px;
  background: var(--primary);
  color: #fff;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

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

.pricing-card h3 {
  font-size: 1.3rem;
  margin-bottom: 6px;
}

.pricing-card .pricing-type {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.pricing-price {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 4px;
  background: linear-gradient(135deg, var(--primary), #6ee7b7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pricing-price .unit {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  -webkit-text-fill-color: var(--text-muted);
}

.pricing-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.pricing-features {
  margin-bottom: 28px;
}

.pricing-features li {
  padding: 7px 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

/* ---------- Capability Flow ---------- */
.capability-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 60px;
}

.flow-step {
  text-align: center;
  flex: 0 0 auto;
  min-width: 120px;
  padding: 20px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.flow-step:hover {
  border-color: var(--primary-border);
  transform: translateY(-4px);
}

.flow-step-icon {
  width: 56px;
  height: 56px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin: 0 auto 12px;
  transition: all var(--transition);
}

.flow-step:hover .flow-step-icon {
  background: rgba(77, 159, 255, 0.15);
  box-shadow: 0 0 20px var(--primary-glow);
}

.flow-step h4 {
  font-size: 0.85rem;
}

.flow-step p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.flow-arrow {
  font-size: 1.3rem;
  color: var(--primary);
  flex-shrink: 0;
  opacity: 0.5;
}

/* ---------- Comparison Table ---------- */
.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-card);
}

.comparison-table th {
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: 16px 24px;
  text-align: left;
  font-weight: 600;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-card);
}

.comparison-table td {
  padding: 14px 24px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

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

.comparison-table tr:hover td {
  background: rgba(255,255,255,0.02);
}

.comparison-table .check { color: var(--success); font-weight: 700; }
.comparison-table .cross { color: #ef4444; }

/* ---------- Category Grid ---------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 60px;
}

.category-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 30px 20px;
  text-align: center;
  transition: all var(--transition);
}

.category-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card-hover);
}

.category-card-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin: 0 auto 14px;
  transition: all var(--transition);
}

.category-card:hover .category-card-icon {
  box-shadow: 0 0 20px var(--primary-glow);
}

.category-card h4 {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.category-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Status badges */
.status-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-top: 8px;
}

.status-badge.live {
  background: rgba(52, 211, 153, 0.1);
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.25);
}

.status-badge.planning {
  background: rgba(107, 114, 128, 0.12);
  color: #9ca3af;
  border: 1px solid rgba(107, 114, 128, 0.2);
}

.status-badge.beta {
  background: rgba(77, 159, 255, 0.1);
  color: #4d9fff;
  border: 1px solid rgba(77, 159, 255, 0.25);
}

/* ---------- Efficiency Compare ---------- */
.efficiency-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 48px;
}

.efficiency-card {
  padding: 44px 36px;
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid; 
  transition: all var(--transition);
}

.efficiency-card.old {
  background: rgba(239, 68, 68, 0.04);
  border-color: rgba(239, 68, 68, 0.2);
}

.efficiency-card.new {
  background: rgba(52, 211, 153, 0.04);
  border-color: rgba(52, 211, 153, 0.2);
}

.efficiency-card .label {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
}

.efficiency-card.old .label { color: #f87171; }
.efficiency-card.new .label { color: #34d399; }

.efficiency-card .time {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.efficiency-card.old .time { color: #f87171; }
.efficiency-card.new .time { color: #34d399; }

.efficiency-card .detail {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ---------- Page Header (inner pages) ---------- */
.page-header {
  background: var(--bg-base);
  padding: 150px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(ellipse, rgba(77, 159, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.page-header #particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.page-header h1 {
  font-size: 2.8rem;
  color: var(--text-primary);
  position: relative;
  z-index: 2;
}

.page-header p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-top: 16px;
  position: relative;
  z-index: 2;
}

/* ---------- About Hero ---------- */
.about-hero {
  background: var(--bg-base);
  padding: 160px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.about-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(ellipse, rgba(77, 159, 255, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.about-hero #particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.about-hero h1 {
  font-size: 2.8rem;
  color: var(--text-primary);
  position: relative;
  z-index: 2;
}

.about-hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-top: 16px;
  position: relative;
  z-index: 2;
}

/* ---------- Mission Card ---------- */
.mission-card {
  background: linear-gradient(135deg, rgba(77, 159, 255, 0.1) 0%, rgba(110, 231, 183, 0.05) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  padding: 60px 48px;
  text-align: center;
  box-shadow: var(--shadow-glow);
}

.mission-card h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.mission-card p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 700px;
  margin: 0 auto;
}

/* ---------- Values Grid ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.value-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  text-align: center;
  transition: all var(--transition);
}

.value-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card-hover);
}

.value-card-icon {
  width: 64px;
  height: 64px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto 20px;
  transition: all var(--transition);
}

.value-card:hover .value-card-icon {
  box-shadow: 0 0 24px var(--primary-glow);
}

.value-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.value-card p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; }

/* ---------- Founder Section ---------- */
.founder-section {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: center;
  margin-top: 48px;
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 48px;
}

.founder-avatar {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #2563eb);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  color: #fff;
  margin: 0 auto;
  box-shadow: 0 0 40px var(--primary-glow);
}

.founder-info h3 { font-size: 1.5rem; margin-bottom: 6px; }
.founder-info .founder-title { color: var(--primary); font-weight: 600; font-size: 0.93rem; margin-bottom: 16px; }
.founder-info .founder-bio { color: var(--text-secondary); line-height: 1.9; }

/* ---------- Insights ---------- */
.insights-grid { margin-top: 48px; }

.insight-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 28px;
  align-items: start;
  transition: all var(--transition);
}

.insight-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.insight-number {
  width: 72px;
  height: 72px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  flex-shrink: 0;
}

.insight-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.insight-card p { color: var(--text-muted); line-height: 1.8; }

.insight-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  color: var(--primary);
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 12px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  margin-top: 48px;
}

.contact-info-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 48px 36px;
}

.contact-info-card h3 { font-size: 1.5rem; margin-bottom: 12px; }
.contact-info-card > p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 32px; line-height: 1.7; }

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 24px;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-item-info h4 {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 3px;
  font-weight: 500;
}

.contact-item-info span {
  font-size: 0.98rem;
  color: var(--text-primary);
  font-weight: 500;
}

.contact-form-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 48px 36px;
}

.contact-form-card h3 { font-size: 1.5rem; margin-bottom: 28px; }

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-family: inherit;
  color: var(--text-primary);
  transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-border);
  background: rgba(255,255,255,0.06);
  box-shadow: 0 0 0 3px rgba(77, 159, 255, 0.08);
}

.form-group textarea { min-height: 120px; resize: vertical; }

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(240,240,245,0.25);
}

.form-submit {
  width: 100%;
  padding: 15px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 0 20px var(--primary-glow);
}

.form-submit:hover {
  background: #5babff;
  box-shadow: 0 0 32px rgba(77, 159, 255, 0.5);
  transform: translateY(-1px);
}

/* ---------- Solution Tabs ---------- */
.solution-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.solution-tab {
  padding: 10px 22px;
  border-radius: 20px;
  font-size: 0.87rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border-card);
  transition: all var(--transition);
  cursor: pointer;
}

.solution-tab:hover,
.solution-tab.active {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: var(--primary-border);
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, rgba(77, 159, 255, 0.08) 0%, rgba(110, 231, 183, 0.04) 100%);
  border-top: 1px solid var(--border-glow);
  border-bottom: 1px solid var(--border-glow);
  padding: 80px 0;
  text-align: center;
}

.cta-banner h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.cta-banner p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-base);
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 32px;
}

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

.footer-brand h3 { font-size: 1.2rem; color: var(--text-primary); margin-bottom: 12px; }
.footer-brand p { font-size: 0.85rem; line-height: 1.7; color: var(--text-muted); }

.footer-col h4 { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 16px; }

.footer-col a {
  display: block;
  font-size: 0.84rem;
  color: var(--text-muted);
  padding: 4px 0;
  transition: color var(--transition);
}

.footer-col a:hover { color: var(--primary); }

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ---------- Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin-left: auto; margin-right: auto; }
  .scenario-card { grid-template-columns: 1fr; gap: 36px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .founder-section { grid-template-columns: 1fr; text-align: center; }
  .efficiency-compare { grid-template-columns: 1fr; max-width: 480px; margin-left: auto; margin-right: auto; }
}

@media (max-width: 768px) {
  :root { --nav-height: 60px; }

  .container { padding: 0 18px; }

  .navbar { padding: 0 18px; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    height: 100dvh;
    background: rgba(10,10,16,0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    padding: 80px 32px 32px;
    gap: 24px;
    transition: right var(--transition);
    border-left: 1px solid var(--border-subtle);
  }

  .nav-links.active { right: 0; }

  .nav-links a { color: var(--text-secondary) !important; font-size: 1.05rem; padding: 4px 0; }
  .nav-links a:hover, .nav-links a.active { color: var(--text-primary) !important; }
  .nav-cta { display: inline-flex; justify-content: center; width: 100%; text-align: center; }

  .nav-toggle { display: flex; z-index: 1002; }

  .hero { padding: 100px 20px 60px; min-height: 100vh; min-height: 100dvh; }
  .hero h1 { font-size: 1.8rem; letter-spacing: -0.5px; }
  .hero-subtitle { font-size: 0.92rem; line-height: 1.7; margin-bottom: 32px; }
  .hero-cta { flex-direction: column; width: 100%; gap: 12px; }
  .hero-cta .btn { width: 100%; padding: 14px 24px; }
  .hero-stats { gap: 20px; }
  .hero-stat-number { font-size: 1.6rem; }
  .hero-stat-label { font-size: 0.78rem; }

  .section { padding: 64px 0; }
  .section-title { font-size: 1.55rem; }
  .section-subtitle { font-size: 0.9rem; margin-bottom: 40px; }
  .section-label { font-size: 0.72rem; letter-spacing: 2px; }

  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card { padding: 28px 22px; }

  .category-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .category-card { padding: 22px 14px; }

  .pricing-grid { grid-template-columns: 1fr; max-width: 100%; }
  .pricing-card { padding: 28px 22px; }
  .pricing-price { font-size: 2rem; }

  .scenario-card { grid-template-columns: 1fr; gap: 28px; padding: 28px 20px; }
  .scenario-content h3 { font-size: 1.4rem; }

  .capability-flow { flex-direction: column; gap: 12px; }
  .flow-step { min-width: 100%; padding: 16px; }
  .flow-arrow { transform: rotate(90deg); font-size: 1rem; }

  .values-grid { grid-template-columns: 1fr; gap: 16px; }
  .value-card { padding: 28px 20px; }

  .efficiency-compare { grid-template-columns: 1fr; max-width: 100%; }
  .efficiency-card { padding: 28px 22px; }
  .efficiency-card .time { font-size: 2rem; }

  .page-header, .about-hero { padding: 120px 0 60px; }
  .page-header h1, .about-hero h1 { font-size: 1.7rem; }

  .mission-card { padding: 32px 20px; }
  .mission-card h2 { font-size: 1.3rem; }
  .mission-card p { font-size: 0.92rem; }

  .founder-section { grid-template-columns: 1fr; text-align: center; padding: 28px 20px; gap: 24px; }
  .founder-avatar { width: 140px; height: 140px; font-size: 2.5rem; }

  .insight-card { grid-template-columns: 1fr; text-align: center; gap: 16px; padding: 24px 20px; }
  .insight-number { width: 56px; height: 56px; font-size: 1.4rem; margin: 0 auto; }
  .insight-card h3 { font-size: 1.05rem; }

  .contact-grid { grid-template-columns: 1fr; }
  .contact-info-card { padding: 28px 20px; }
  .contact-info-card h3 { font-size: 1.3rem; }

  .cta-banner { padding: 56px 0; }
  .cta-banner h2 { font-size: 1.5rem; }

  .footer { padding: 40px 0 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 8px; }

  .comparison-table { font-size: 0.8rem; }
  .comparison-table th, .comparison-table td { padding: 10px 12px; }

  /* Ensure buttons are finger-friendly */
  .btn { padding: 13px 24px; font-size: 0.93rem; min-height: 44px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.55rem; }
  .hero-subtitle { font-size: 0.85rem; }
  .hero-badge { font-size: 0.75rem; padding: 6px 14px; }

  .section { padding: 48px 0; }
  .section-title { font-size: 1.35rem; }

  .category-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .category-card { padding: 18px 10px; }
  .category-card h4 { font-size: 0.85rem; }
  .category-card p { font-size: 0.72rem; }
  .status-badge { font-size: 0.65rem; padding: 2px 8px; }

  .hero-stats { flex-direction: column; align-items: center; gap: 16px; }

  .scenario-tags { gap: 6px; }
  .scenario-tag { padding: 5px 12px; font-size: 0.75rem; }

  .scenario-doc-card { padding: 14px 16px; }

  .pricing-card { padding: 22px 18px; }
  .pricing-card h3 { font-size: 1.1rem; }

  .btn { padding: 12px 20px; font-size: 0.88rem; }
  .btn-primary, .btn-ghost, .btn-outline { width: 100%; }

  .contact-info-card, .contact-form-card { padding: 24px 18px; }
  .contact-item-icon { width: 38px; height: 38px; font-size: 1rem; }

  .section-subtitle { font-size: 0.84rem; }
  .page-header h1, .about-hero h1 { font-size: 1.5rem; }
  .page-header p, .about-hero p { font-size: 0.85rem; }

  .scenario-card { padding: 22px 16px; }
}