/* ============================================
   Enerlytics Global Styles
   能析智科 企业官网全局样式
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Brand Colors */
  --brand-green-1: #10d0bb;
  --brand-green-2: #48de6f;
  --brand-green-3: #c7fb36;
  --brand-gradient: linear-gradient(135deg, #10d0bb, #48de6f, #c7fb36);
  --brand-gradient-h: linear-gradient(90deg, #10d0bb, #48de6f, #c7fb36);
  --brand-gradient-v: linear-gradient(180deg, #10d0bb, #48de6f, #c7fb36);

  /* Backgrounds */
  --bg-primary: #0a0f1a;
  --bg-secondary: #111827;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --bg-input: rgba(255, 255, 255, 0.06);
  --bg-nav: rgba(10, 15, 26, 0.85);

  /* Text */
  --text-primary: #f5f4ef;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --text-accent: #10d0bb;

  /* Borders */
  --border-card: rgba(255, 255, 255, 0.08);
  --border-card-hover: rgba(16, 208, 187, 0.3);
  --border-input: rgba(255, 255, 255, 0.12);
  --border-input-focus: #10d0bb;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 8px 40px rgba(16, 208, 187, 0.15);
  --shadow-glow: 0 0 30px rgba(16, 208, 187, 0.2);

  /* Spacing */
  --section-padding: 100px 0;
  --container-max: 1200px;
  --container-padding: 0 24px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Font */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* ---------- Utility ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--container-padding);
}

.section {
  padding: var(--section-padding);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h1, .section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  background: var(--brand-gradient-h);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

.gradient-text {
  background: var(--brand-gradient-h);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(16, 208, 187, 0.15); }
  50% { box-shadow: 0 0 40px rgba(16, 208, 187, 0.3); }
}

}

/* Scanning shimmer for alive chart feel */
@keyframes chartShimmer {
  0% { transform: translateX(-40%); }
  100% { transform: translateX(250%); }
}

/* Chat message slide-in */
@keyframes chatSlideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Typing dots bounce */
@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-6px); }
}

.fade-in-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-card);
  transition: background var(--transition-normal);
}

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

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

.nav-logo img {
  height: 36px;
  width: auto;
}

.nav-logo .logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

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

.nav-links a {
  padding: 8px 16px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--brand-gradient-h);
  border-radius: 1px;
}

/* Mobile top-bar lang switch — hidden on desktop */
.nav-lang-mobile {
  display: none;
}

/* Mobile auth buttons — hidden on desktop */
.nav-auth-mobile {
  display: none;
}

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

/* Language Switch */
.lang-switch {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  padding: 2px;
  gap: 2px;
}

.lang-switch button {
  padding: 6px 12px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.lang-switch button.active {
  background: var(--brand-gradient-h);
  color: var(--bg-primary);
  font-weight: 600;
}

/* Nav Auth Buttons */
.btn-login {
  padding: 8px 20px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-login:hover {
  color: var(--text-primary);
  border-color: var(--border-card-hover);
  background: var(--bg-card);
}

.btn-register {
  padding: 8px 20px;
  font-size: 0.875rem;
  color: var(--bg-primary);
  background: var(--brand-gradient-h);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.btn-register:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* User Menu (Logged In) */
.user-menu {
  display: none;
  align-items: center;
  gap: 12px;
  position: relative;
}

.user-menu.show {
  display: flex;
}

/* ===== 登录状态类驱动（替代 JS 内联 style） ===== */
/* body 上的 .logged-in / .logged-out 由 auth.js 设置，CSS 在每个断点内独立决定显隐 */
/* i18n 空文案隐藏（替代内联 style.display） */
.i18n-empty {
  display: none;
}

/* 桌面端默认：未登录显示登录/注册按钮，隐藏用户菜单 */
body.logged-out .nav-actions .btn-login,
body.logged-out .nav-actions .btn-register {
  display: inline-flex;
}
body.logged-out .nav-actions .user-menu {
  display: none;
}
/* 桌面端默认：已登录隐藏登录/注册按钮，显示用户菜单 */
body.logged-in .nav-actions .btn-login,
body.logged-in .nav-actions .btn-register {
  display: none;
}
body.logged-in .nav-actions .user-menu {
  display: flex;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--brand-gradient-h);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--bg-primary);
  cursor: pointer;
  transition: box-shadow var(--transition-fast);
}

.user-avatar:hover {
  box-shadow: var(--shadow-glow);
}

.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 8px;
  min-width: 180px;
  box-shadow: var(--shadow-card);
  display: none;
  animation: fadeIn 0.2s ease;
}

.user-dropdown.show {
  display: block;
}

.user-dropdown .user-info {
  padding: 12px;
  border-bottom: 1px solid var(--border-card);
  margin-bottom: 4px;
}

.user-dropdown .user-info .name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.user-dropdown .user-info .email {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.user-dropdown a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.user-dropdown a:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.user-dropdown a.logout {
  color: #f87171;
}

.user-dropdown a.logout:hover {
  background: rgba(248, 113, 113, 0.1);
}

/* Mobile Menu */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-gradient-h);
  color: var(--bg-primary);
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

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

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--brand-green-1);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.0625rem;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.875rem;
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg .glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.3;
}

.hero-bg .glow-1 {
  width: 600px;
  height: 600px;
  background: var(--brand-green-1);
  top: -200px;
  right: -100px;
  animation: float 8s ease-in-out infinite;
}

.hero-bg .glow-2 {
  width: 400px;
  height: 400px;
  background: var(--brand-green-2);
  bottom: -100px;
  left: -100px;
  animation: float 6s ease-in-out infinite reverse;
}

.hero-bg .glow-3 {
  width: 300px;
  height: 300px;
  background: var(--brand-green-3);
  top: 40%;
  left: 30%;
  opacity: 0.15;
  animation: float 10s ease-in-out infinite;
}

/* Grid Pattern Overlay */
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease both;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-green-2);
  animation: pulse-glow 2s infinite;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero h1 .gradient-text {
  display: inline;
}

.hero .subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 580px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stats .stat {
  text-align: left;
}

.hero-stats .stat-value {
  font-size: 2rem;
  font-weight: 800;
  background: var(--brand-gradient-h);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stats .stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---------- Feature Cards ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--brand-gradient-h);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

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

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- Product Preview ---------- */
.product-preview {
  position: relative;
  padding: 80px 0;
}

.preview-container {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-card);
  max-width: 1000px;
  margin: 0 auto;
  overflow: hidden;
}

.preview-titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-card);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  margin: -16px -16px 16px -16px;
}

.preview-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.preview-dot.red { background: #ff5f57; }
.preview-dot.yellow { background: #febc2e; }
.preview-dot.green { background: #28c840; }

.preview-titlebar .title {
  flex: 1;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Mock App Layout */
.mock-app {
  display: grid;
  grid-template-columns: 200px 1fr 320px;
  gap: 8px;
  min-height: 400px;
  background: #1a1a2e;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.mock-sidebar {
  background: #252540;
  padding: 16px 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mock-sidebar-item {
  padding: 8px 12px;
  font-size: 0.75rem;
  color: #888;
  border-radius: 6px;
  transition: background 0.2s;
}

.mock-sidebar-item.active {
  background: rgba(16, 208, 187, 0.15);
  color: var(--brand-green-1);
}

.mock-sidebar-item::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  margin-right: 8px;
  background: currentColor;
  opacity: 0.5;
}

.mock-chart-area {
  background: #1a1a2e;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mock-chart-header {
  display: flex;
  gap: 12px;
}

.mock-tab {
  padding: 6px 16px;
  font-size: 0.75rem;
  background: var(--bg-card);
  border-radius: 6px;
  color: #888;
}

.mock-tab.active {
  background: var(--brand-gradient-h);
  color: #000;
  font-weight: 600;
}

.mock-chart {
  flex: 1;
  background: #12122a;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  min-height: 200px;
}

/* Chart curve sets — 4 different patterns */
.chart-curve {
  display: none;
  position: absolute;
  inset: 0;
}

.chart-curve.active {
  display: block;
}

/* Scanning shimmer effect — makes chart look alive */
.chart-curve.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(16, 208, 187, 0.06) 40%, 
    rgba(16, 208, 187, 0.12) 50%, 
    rgba(16, 208, 187, 0.06) 60%, 
    transparent 100%
  );
  animation: chartShimmer 2.5s ease-in-out infinite;
  pointer-events: none;
  z-index: 1;
}

/* SVG curve canvas — full-amplitude smooth bezier curves */
.curve-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Main smooth curve — brand green, fully visible (no draw animation) */
.curve-svg .chart-line {
  fill: none;
  stroke: var(--brand-green-1);
  stroke-width: 1.6;
  stroke-linejoin: round;
  stroke-linecap: round;
  filter: drop-shadow(0 0 3px rgba(16, 208, 187, 0.5));
  vector-effect: non-scaling-stroke;
}

/* Secondary curve — lighter (load optimization comparison) */
.curve-svg .chart-line-2 {
  fill: none;
  stroke: rgba(78, 201, 176, 0.55);
  stroke-width: 1.2;
  stroke-linejoin: round;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

/* Gradient fill beneath curve */
.curve-svg .curve-fill {
  opacity: 1;
}

.mock-chart .grid-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(255,255,255,0.04);
}

.mock-chat {
  background: #1e1e38;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}

.mock-chat-header {
  font-size: 0.75rem;
  color: #888;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}

/* Chat message groups for agent demo */
.mock-chat-group {
  display: none;
  flex-direction: column;
  gap: 8px;
}

.mock-chat-group.active {
  display: flex;
}

.mock-chat-group .mock-bubble {
  animation: chatSlideIn 0.4s ease both;
}

.mock-chat-group .mock-bubble.assistant {
  animation-delay: 0.2s;
}

.mock-bubble {
  padding: 8px 12px;
  border-radius: 12px;
  font-size: 0.7rem;
  line-height: 1.5;
  max-width: 85%;
  color: #ccc;
}

.mock-bubble.user {
  align-self: flex-end;
  background: rgba(16, 208, 187, 0.2);
  border-bottom-right-radius: 4px;
}

.mock-bubble.assistant {
  align-self: flex-start;
  background: #2a2a4a;
  border-bottom-left-radius: 4px;
}

/* Typing indicator */
.mock-typing {
  display: none;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  align-self: flex-start;
  background: #2a2a4a;
  border-radius: 12px;
  border-bottom-left-radius: 4px;
}

.mock-typing.active {
  display: inline-flex;
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #888;
  animation: typingBounce 1.2s ease-in-out infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

/* Upload status indicators */
.upload-status {
  display: none;
  font-size: 0.7rem;
  color: var(--brand-green-2);
  padding: 4px 8px;
  align-self: flex-start;
  animation: chatSlideIn 0.3s ease both;
}

.upload-status.show {
  display: block;
}

.mock-chat-input {
  margin-top: auto;
  padding: 8px 12px;
  background: #2a2a4a;
  border-radius: 8px;
  font-size: 0.7rem;
  color: #555;
}

/* ---------- Market / Stats Section ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.stat-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

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

.stat-card .number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--brand-gradient-h);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-card .unit {
  font-size: 1.25rem;
  font-weight: 600;
  background: var(--brand-gradient-h);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card .label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* ---------- CTA Section ---------- */
.cta-section {
  padding: 80px 0;
  position: relative;
}

.cta-box {
  text-align: center;
  padding: 80px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  height: 4px;
  background: var(--brand-gradient-h);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.cta-box h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-box p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 32px;
}

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

/* ---------- Footer ---------- */
.footer {
  padding: 64px 0 32px;
  border-top: 1px solid var(--border-card);
  background: var(--bg-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand .logo-row img {
  height: 28px;
}

.footer-brand .logo-row span {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 6px 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--brand-green-1);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-card);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* ---------- Product Page ---------- */
.product-hero {
  padding-top: 120px;
  padding-bottom: 60px;
}

.product-hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.product-hero .subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 32px;
}

/* Module Cards */
.modules-section {
  padding: 80px 0;
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.module-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition-normal);
  position: relative;
}

.module-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.module-card .module-number {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-green-1);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.module-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.module-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.module-card .features-list {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.module-card .features-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.module-card .features-list li::before {
  content: '✓';
  color: var(--brand-green-2);
  font-weight: 700;
  flex-shrink: 0;
}

/* Tech Stack */
.tech-stack {
  padding: 80px 0;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.tech-item {
  text-align: center;
  padding: 32px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.tech-item:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-2px);
}

.tech-item .tech-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.tech-item .tech-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.tech-item .tech-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Security Section */
.security-section {
  padding: 80px 0;
}

.security-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.security-card {
  display: flex;
  gap: 16px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.security-card:hover {
  border-color: var(--border-card-hover);
}

.security-card .icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(16, 208, 187, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--brand-green-1);
  flex-shrink: 0;
}

.security-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.security-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ---------- Solutions Page ---------- */
.solution-section {
  padding: 80px 0;
}

.solution-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 100px;
}

.solution-block:last-child {
  margin-bottom: 0;
}

.solution-block.reverse {
  direction: rtl;
}

.solution-block.reverse > * {
  direction: ltr;
}

.solution-content .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(16, 208, 187, 0.1);
  border: 1px solid rgba(16, 208, 187, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--brand-green-1);
  font-weight: 600;
  margin-bottom: 20px;
}

.solution-content .badge.coming-soon {
  background: rgba(206, 145, 120, 0.1);
  border-color: rgba(206, 145, 120, 0.2);
  color: #ce9178;
}

.solution-content h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.solution-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.solution-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.solution-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.solution-features li .check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(16, 208, 187, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--brand-green-2);
  flex-shrink: 0;
  margin-top: 2px;
}

.solution-visual {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.solution-visual .visual-icon {
  font-size: 5rem;
  opacity: 0.6;
  animation: float 6s ease-in-out infinite;
}

/* Visual decorations for solution cards */
.solution-visual::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--brand-green-1);
  filter: blur(100px);
  opacity: 0.15;
  top: -50px;
  right: -50px;
}

.solution-visual::after {
  content: '';
  position: absolute;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: var(--brand-green-2);
  filter: blur(80px);
  opacity: 0.1;
  bottom: -30px;
  left: -30px;
}

/* ---------- About Page ---------- */
.about-hero {
  padding-top: 120px;
  padding-bottom: 60px;
}

.about-hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.about-hero .subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
}

/* Vision Section */
.vision-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.vision-card {
  text-align: center;
  padding: 40px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.vision-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-4px);
}

.vision-card .icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.vision-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.vision-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Core Competency */
.competency-section {
  padding: 80px 0;
}

.competency-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.competency-item {
  display: flex;
  gap: 32px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.competency-item:hover {
  border-color: var(--border-card-hover);
}

.competency-item .icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(16, 208, 187, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--brand-green-1);
  flex-shrink: 0;
}

.competency-item h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
  white-space: nowrap;
  flex-shrink: 0;
}

.competency-item p {
  font-size: 0.9375;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Team Section */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

.team-card:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-4px);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-card-hover);
  border: 2px solid var(--border-card);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-muted);
  overflow: hidden;
}

.team-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-card .role {
  font-size: 0.8125rem;
  color: var(--brand-green-1);
  margin-bottom: 8px;
}

.team-card .bio {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- Download Page ---------- */
.download-hero {
  padding-top: 120px;
  padding-bottom: 60px;
}

.download-hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.download-card .version {
  font-size: 0.875rem;
  color: var(--brand-green-1);
  font-weight: 600;
  margin-bottom: 16px;
}

.download-card h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.download-card p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.download-card .system-req {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 32px;
}

.download-card .req {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Changelog */
.changelog {
  max-width: 700px;
  margin: 80px auto 0;
}

.changelog h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.changelog-item {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}

.changelog-item .version-tag {
  display: inline-flex;
  padding: 2px 10px;
  background: rgba(16, 208, 187, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--brand-green-1);
  font-weight: 600;
  margin-bottom: 12px;
}

.changelog-item .date {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-left: 12px;
}

.changelog-item ul {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.changelog-item ul li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
}

.changelog-item ul li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--brand-green-2);
}

/* Deploy Options */
.deploy-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 80px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.deploy-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.deploy-card:hover {
  border-color: var(--border-card-hover);
}

.deploy-card h4 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.deploy-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.deploy-card .badge {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.deploy-card .badge.available {
  background: rgba(16, 208, 187, 0.1);
  color: var(--brand-green-1);
}

.deploy-card .badge.planned {
  background: rgba(206, 145, 120, 0.1);
  color: #ce9178;
}

/* ---------- Auth Pages ---------- */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.auth-page .hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.auth-page .hero-bg .glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.2;
}

.auth-page .hero-bg .glow-1 {
  width: 500px;
  height: 500px;
  background: var(--brand-green-1);
  top: -150px;
  right: -50px;
}

.auth-page .hero-bg .glow-2 {
  width: 400px;
  height: 400px;
  background: var(--brand-green-2);
  bottom: -100px;
  left: -80px;
}

.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-card);
}

.auth-card .auth-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  text-decoration: none;
}

.auth-card .auth-logo img {
  height: 32px;
}

.auth-card .auth-logo span {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.auth-card h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-card .auth-subtitle {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

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

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
}

.form-group input:focus {
  border-color: var(--border-input-focus);
  box-shadow: 0 0 0 3px rgba(16, 208, 187, 0.1);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.form-row label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.form-row label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--brand-green-1);
}

.form-row a {
  font-size: 0.875rem;
  color: var(--brand-green-1);
}

.form-row a:hover {
  text-decoration: underline;
}

.form-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.form-footer a {
  color: var(--brand-green-1);
  font-weight: 600;
}

.form-footer a:hover {
  text-decoration: underline;
}

.form-error {
  color: #f87171;
  font-size: 0.8125rem;
  margin-top: 4px;
  display: none;
}

.form-error.show {
  display: block;
}

.form-success {
  padding: 12px;
  background: rgba(16, 208, 187, 0.1);
  border: 1px solid rgba(16, 208, 187, 0.2);
  border-radius: var(--radius-sm);
  color: var(--brand-green-1);
  font-size: 0.875rem;
  text-align: center;
  margin-bottom: 16px;
  display: none;
}

.form-success.show {
  display: block;
}

.form-terms {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.form-terms input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--brand-green-1);
  margin-top: 2px;
  flex-shrink: 0;
}

.form-terms a {
  color: var(--brand-green-1);
}

/* ---------- Toast Notification ---------- */
.toast {
  position: fixed;
  top: 90px;
  right: 24px;
  z-index: 2000;
  padding: 14px 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  font-size: 0.9375rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateX(120%);
  transition: transform var(--transition-normal);
}

.toast.show {
  transform: translateX(0);
}

.toast.success {
  border-left: 3px solid var(--brand-green-2);
}

.toast.error {
  border-left: 3px solid #f87171;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .features-grid,
  .modules-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

  .solution-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .solution-block.reverse {
    direction: ltr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
  }

  /* ── Mobile nav: fully isolated from desktop ── */
  .navbar {
    position: relative;
  }

  .navbar .container {
    height: 64px;
    justify-content: flex-start;  /* override desktop space-between */
  }

  /* Logo stays left, lang-switch pushed right, hamburger far right */
  .nav-lang-mobile {
    display: flex;
    align-items: center;
    margin-left: auto;    /* push toward hamburger */
    margin-right: 8px;    /* gap before hamburger */
    flex-shrink: 0;
  }

  .nav-lang-mobile .lang-switch {
    display: flex;        /* show inside mobile bar */
  }

  .mobile-toggle {
    display: flex;
    flex-shrink: 0;
  }

  /* Hide desktop-only items in nav-actions */
  .nav-actions .lang-switch,
  .nav-actions .btn-login,
  .nav-actions .btn-register {
    display: none !important;
  }

  /* Mobile dropdown menu — height auto-sized by content */
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    animation: fadeIn 0.2s ease;
    z-index: 999;
    border-bottom: 1px solid var(--border-card);
  }

  .nav-links.mobile-open {
    display: flex;
  }

  .nav-links a {
    font-size: 1.125rem;
    padding: 12px 16px;
  }

  /* Mobile auth buttons — 在 .nav-links 折叠菜单内，随菜单展开/收起 */
  /* display:flex 覆盖桌面端基础 display:none；父级 .nav-links 收起时 display:none，
     子元素天然不可见，展开时随父级显示 */
  .nav-auth-mobile {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-card);
  }
  /* 已登录时隐藏未登录入口（user-menu 由桌面端 .show 机制控制）*/
  body.logged-in .nav-auth-mobile {
    display: none;
  }

  .nav-auth-mobile .btn-login,
  .nav-auth-mobile .btn-register {
    width: 100%;
    justify-content: center;
    padding: 12px 20px;
    text-align: center;
    display: flex;
    white-space: nowrap;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

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

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

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

  .section-header h1, .section-header h2 {
    font-size: 1.75rem;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .team-grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }

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

  .mock-app {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .mock-sidebar {
    display: none;
  }

  /* Mobile portrait: show chat below chart, hide sidebar */
  .mock-chat {
    display: block;
    margin-top: 12px;
    min-height: 200px;
  }

  .deploy-options {
    grid-template-columns: 1fr;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  .auth-card {
    padding: 32px 24px;
  }
}

/* ===== Landscape orientation on mobile ===== */
@media (orientation: landscape) and (max-width: 768px) {
  /* Nav — 横屏完全套用竖屏的折叠规则（登录注册在汉堡菜单内）*/
  .navbar .container { height: 48px; }
  /* 显式重复折叠规则，不依赖竖屏块的继承 */
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    z-index: 999;
    border-bottom: 1px solid var(--border-card);
  }
  .nav-links.mobile-open { display: flex; }
  .nav-links a { font-size: 1.125rem; padding: 10px 16px; }
  .nav-actions .lang-switch,
  .nav-actions .btn-login,
  .nav-actions .btn-register { display: none !important; }
  .nav-lang-mobile { display: flex; align-items: center; margin-left: auto; margin-right: 8px; flex-shrink: 0; }
  .nav-lang-mobile .lang-switch { display: flex; }
  .nav-lang-mobile .lang-switch button { padding: 4px 10px; font-size: 0.75rem; }
  .mobile-toggle { display: flex; flex-shrink: 0; }
  /* display:flex 覆盖桌面端 display:none；父级 .nav-links 控制折叠显隐 */
  .nav-auth-mobile {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-card);
  }
  .nav-auth-mobile .btn-login,
  .nav-auth-mobile .btn-register { width: 100%; justify-content: center; padding: 10px 20px; display: flex; white-space: nowrap; }
  body.logged-in .nav-auth-mobile { display: none; }

  /* Hero: compact */
  .hero { min-height: auto; padding: 72px 0 32px; }
  .hero h1 { font-size: 2rem; }
  .hero .subtitle { font-size: 0.9375rem; margin-bottom: 24px; }
  .hero-stats { flex-direction: row; gap: 32px; margin-top: 32px; }
  .hero-actions { flex-direction: row; }
  .hero-actions .btn { width: auto; }

  /* Product preview: simplified 2-column，防止文字溢出 */
  .mock-app { grid-template-columns: 100px 1fr; }
  .mock-sidebar { display: flex; font-size: 0.75rem; padding: 8px 4px; }
  .mock-chat { display: none; }
  .mock-sidebar-item { font-size: 0.65rem; padding: 6px 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .mock-chart { min-height: 140px; }
  .mock-tab { font-size: 0.65rem; padding: 4px 8px; white-space: nowrap; }
  .preview-titlebar .title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; text-align: left; padding-left: 8px; }
  .mock-chat-header { font-size: 0.7rem; }
  .mock-bubble { font-size: 0.65rem; }

  /* Grids */
  .features-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(3, 1fr); }
  .vision-grid { grid-template-columns: repeat(3, 1fr); }
  .deploy-options { grid-template-columns: repeat(2, 1fr); }
  .section-header { margin-bottom: 24px; }
  .section-header h1, .section-header h2 { font-size: 1.5rem; }

  /* Sections compact */
  .section { padding: 32px 0; }

  /* Stats cards */
  .stat-card { padding: 16px; }
  .stat-card .number { font-size: 1.75rem; }

  /* CTA + footer 横屏恢复行布局 */
  .cta-actions { flex-direction: row; }
  .footer-bottom { flex-direction: row; }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.875rem;
  }

  .section-header h1, .section-header h2 {
    font-size: 1.5rem;
  }

  .stat-card .number {
    font-size: 2rem;
  }

  .download-card {
    padding: 32px 20px;
  }
}

/* ============================================
   Profile Page
   个人中心
   ============================================ */

/* Not logged in guard */
.profile-guard {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  padding-top: 120px;
}

.guard-card {
  text-align: center;
  max-width: 400px;
  padding: 48px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
}

.guard-card .guard-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.guard-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.guard-card p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Profile Layout */
.profile-page {
  padding-top: 72px;
  min-height: 100vh;
}

.profile-header-bar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-card);
  padding: 40px 0 32px;
}

.profile-header-bar .container {
  display: flex;
  align-items: center;
  gap: 20px;
}

.profile-avatar-large {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--brand-gradient-h);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 800;
  color: var(--bg-primary);
  flex-shrink: 0;
}

.profile-header-info h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.profile-header-info p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Profile Body: sidebar + content */
.profile-body {
  padding: 40px 0 80px;
}

.profile-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  align-items: start;
}

/* Profile Sidebar */
.profile-sidebar {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 12px;
  position: sticky;
  top: 88px;
}

.profile-sidebar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.profile-sidebar-item:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.profile-sidebar-item.active {
  background: rgba(16, 208, 187, 0.1);
  color: var(--brand-green-1);
  font-weight: 600;
}

.profile-sidebar-item .icon {
  font-size: 1.125rem;
  width: 20px;
  text-align: center;
}

/* Profile Content */
.profile-content {
  min-height: 400px;
}

.profile-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}

.profile-panel.active {
  display: block;
}

.profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
}

.profile-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Welcome banner */
.welcome-banner {
  background: var(--brand-gradient-h);
  padding: 32px;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  color: var(--bg-primary);
}

.welcome-banner h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.welcome-banner p {
  font-size: 0.9375rem;
  opacity: 0.85;
}

/* Plan card */
.plan-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.plan-info .plan-name {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: rgba(16, 208, 187, 0.1);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--brand-green-1);
  margin-bottom: 8px;
}

.plan-info .plan-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Stats grid (profile) */
.profile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.profile-stat {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.profile-stat:hover {
  border-color: var(--border-card-hover);
  transform: translateY(-2px);
}

.profile-stat .stat-num {
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--brand-gradient-h);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.profile-stat .stat-text {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Quick actions */
.quick-actions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.quick-action {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

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

.quick-action .action-icon {
  font-size: 1.75rem;
  margin-bottom: 10px;
}

.quick-action .action-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Info table */
.info-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.info-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-card);
}

.info-row:last-child {
  border-bottom: none;
}

.info-row .info-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.info-row .info-value {
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-weight: 500;
}

.info-row .info-value.mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.info-row input.edit-input {
  padding: 6px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-input-focus);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9375rem;
  text-align: right;
  width: 240px;
}

/* Security items */
.security-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-card);
}

.security-item:last-child {
  border-bottom: none;
}

.security-item.danger .security-text h4 {
  color: #f87171;
}

.security-item .security-text h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.security-item .security-text p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.security-item button {
  padding: 8px 16px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.security-item button:hover {
  border-color: var(--border-card-hover);
  color: var(--text-primary);
}

.security-item.danger button {
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.3);
}

.security-item.danger button:hover {
  background: rgba(248, 113, 113, 0.1);
}

/* Edit buttons */
.edit-actions {
  display: flex;
  gap: 8px;
}

.btn-text {
  padding: 6px 14px;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.btn-text.save {
  color: var(--bg-primary);
  background: var(--brand-gradient-h);
  font-weight: 600;
}

.btn-text.cancel {
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
}

.btn-text.edit {
  color: var(--brand-green-1);
  background: rgba(16, 208, 187, 0.1);
}

/* Downloads table */
.downloads-empty {
  text-align: center;
  padding: 60px 20px;
}

.downloads-empty .empty-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.5;
}

.downloads-empty p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

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

.downloads-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-card);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.downloads-table td {
  padding: 14px 16px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-card);
}

.downloads-table tbody tr:hover {
  background: var(--bg-card);
}

/* Responsive */
@media (max-width: 768px) {
  .profile-layout {
    grid-template-columns: 1fr;
  }

  .profile-sidebar {
    position: static;
    display: flex;
    overflow-x: auto;
    gap: 4px;
    padding: 8px;
  }

  .profile-sidebar-item {
    white-space: nowrap;
    padding: 10px 14px;
  }

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

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

  .profile-header-bar .container {
    flex-direction: column;
    text-align: center;
  }

  .plan-card {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .info-row input.edit-input {
    width: 100%;
  }
}


/* ---------- Animation Delay Utilities ---------- */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }

/* ============================================
   Temporarily hidden sections
   暂时隐藏的板块（恢复时删除以下规则即可）
   ============================================ */
/* 核心团队 — about.html */
#team {
  display: none;
}

/* 技术架构 — product.html */
.tech-stack {
  display: none;
}