/* ========================================
   润默AI内容工坊 v2 —  Premium Design
   ======================================== */

/* ===== Design Tokens ===== */
:root {
  /* Colors */
  --primary-900: #0f0a2e;
  --primary-800: #1e1b4b;
  --primary-700: #312e81;
  --primary-600: #3730a3;
  --primary-500: #4f46e5;
  --primary-400: #6366f1;
  --primary-300: #818cf8;
  --primary-200: #a5b4fc;
  --primary-100: #e0e7ff;
  --primary-50:  #eef2ff;

  --accent-500: #7c3aed;
  --accent-400: #8b5cf6;
  --accent-300: #a78bfa;

  --warm-500: #f59e0b;
  --warm-400: #fbbf24;
  --warm-200: #fef3c7;

  --success: #10b981;
  --danger: #ef4444;

  --gray-50:  #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* Typography */
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;

  /* Spacing */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.1);
  --shadow-glow: 0 0 30px rgba(79,70,229,0.2);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--primary-200); }

/* ===== Utilities ===== */
.text-muted { color: var(--gray-500); }
.gradient-text {
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500), #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.highlight { color: var(--primary-500); font-weight: 600; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--gray-200);
  background: white;
  color: var(--gray-800);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  white-space: nowrap;
  font-family: inherit;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  color: white;
  border-color: transparent;
}
.btn-primary:hover { box-shadow: 0 4px 16px rgba(79,70,229,0.35); }

.btn-outline {
  background: transparent;
  border-color: var(--gray-300);
}
.btn-outline:hover { border-color: var(--primary-400); color: var(--primary-500); }

.btn-cta {
  background: white;
  color: var(--primary-600);
  border-color: transparent;
  font-size: 17px;
  padding: 16px 44px;
}
.btn-cta:hover { box-shadow: 0 8px 30px rgba(255,255,255,0.25); transform: translateY(-2px); }

.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn-xl { padding: 16px 44px; font-size: 17px; }

.pulse-glow {
  animation: pulseGlow 2s ease-in-out infinite;
}
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 4px 16px rgba(79,70,229,0.35); }
  50% { box-shadow: 0 4px 28px rgba(79,70,229,0.55), 0 0 60px rgba(79,70,229,0.15); }
}

/* ===== Section Common ===== */
.section {
  padding: 100px 0;
}
.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--primary-500);
  background: var(--primary-50);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin-bottom: 12px;
}
.section-desc {
  font-size: 16px;
  color: var(--gray-500);
  max-width: 560px;
  margin: 0 auto 48px;
  text-align: center;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(16px) saturate(1.8);
  border-bottom: 1px solid transparent;
  transition: all 0.3s;
}
.header.scrolled {
  background: rgba(255,255,255,0.95);
  border-bottom-color: var(--gray-200);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--gray-900);
}
.logo-icon { color: var(--primary-500); font-size: 22px; }
.logo-accent { color: var(--primary-500); }
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-500);
  transition: color 0.2s;
}
.nav-link:hover { color: var(--primary-500); }
.usage-badge {
  font-size: 12px;
  font-weight: 600;
  background: linear-gradient(135deg, var(--primary-50), #f0f0ff);
  color: var(--primary-600);
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--primary-100);
}
.nav-cta { margin-left: 4px; }

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-800);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 0 60px;
  position: relative;
  overflow: hidden;
}
.hero-bg-glow {
  position: absolute;
  top: -30%;
  right: -20%;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,70,229,0.08), transparent 60%);
  pointer-events: none;
}
.hero-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-text {
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  background: var(--primary-50);
  color: var(--primary-600);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
  border: 1px solid var(--primary-100);
}
.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 17px;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}
.hero-stats-row {
  display: flex;
  align-items: center;
  gap: 24px;
}
.hero-stat {
  text-align: left;
}
.hero-stat-num {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-500);
  letter-spacing: -0.3px;
}
.hero-stat-label {
  font-size: 13px;
  color: var(--gray-400);
}
.hero-stat-divider {
  width: 1px;
  height: 36px;
  background: var(--gray-200);
}

/* Pipeline Visual */
.pipeline-visual {
  background: linear-gradient(145deg, white, var(--gray-50));
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.pipeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  animation: fadeUp 0.5s ease-out both;
  animation-delay: calc(var(--i) * 0.12s);
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.pipeline-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-50), white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: all 0.3s;
}
.pipeline-step:hover .pipeline-icon {
  border-color: var(--primary-300);
  box-shadow: var(--shadow-glow);
  transform: scale(1.05);
}
.pipeline-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-600);
}
.pipeline-arrow {
  font-size: 20px;
  color: var(--primary-300);
  font-weight: 300;
}
.pipeline-outputs {
  width: 100%;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px dashed var(--gray-200);
}
.pipeline-outputs .pipeline-output {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.pipeline-outputs .pipeline-output span {
  font-size: 12px;
  padding: 6px 14px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  color: var(--gray-600);
  font-weight: 500;
}

/* ===== SHOWCASE ===== */
.section-showcase {
  background: white;
  text-align: center;
}
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.showcase-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  text-align: left;
  transition: all 0.3s;
}
.showcase-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--accent);
}
.showcase-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--gray-200);
  background: white;
}
.showcase-platform { font-size: 14px; font-weight: 600; }
.showcase-badge {
  font-size: 11px;
  font-weight: 600;
  background: var(--primary-50);
  color: var(--primary-500);
  padding: 3px 10px;
  border-radius: 10px;
}
.showcase-card-body {
  padding: 18px;
}
.showcase-card-body h4 {
  font-size: 15px;
  margin-bottom: 8px;
}
.showcase-card-body p {
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: 6px;
}
.showcase-truncate { font-size: 13px; color: var(--gray-400); }
.showcase-more {
  color: var(--primary-400);
  cursor: pointer;
  font-weight: 500;
}
.showcase-card-footer {
  display: flex;
  gap: 16px;
  padding: 12px 18px;
  border-top: 1px solid var(--gray-200);
  font-size: 12px;
  color: var(--gray-400);
}
.showcase-cta {
  text-align: center;
}
.showcase-cta p {
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 16px;
}

/* ===== HOW IT WORKS ===== */
.section-how {
  text-align: center;
  background: white;
}
.steps-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  max-width: 900px;
  margin: 60px auto 0;
}
.step-card {
  flex: 1;
  max-width: 240px;
  text-align: center;
  padding: 32px 20px;
}
.step-number {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary-400);
  margin-bottom: 12px;
}
.step-icon {
  font-size: 40px;
  margin-bottom: 16px;
}
.step-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.step-card p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.6;
}
.step-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 60px;
}
.step-connector-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-200);
}
.step-connector-line {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--primary-200), var(--primary-400));
}

/* ===== FEATURES ===== */
.section-features {
  background: var(--gray-50);
  text-align: center;
}
.features-pipeline {
  max-width: 960px;
  margin: 0 auto;
}
.features-group {
  margin-bottom: 36px;
  text-align: left;
}
.features-group:last-child { margin-bottom: 0; }
.features-group-label {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
}
.features-group-label span {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-800);
}
.features-group-label small {
  font-size: 13px;
  color: var(--gray-400);
}
.features-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 14px;
}
.feature-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.3s;
  position: relative;
  text-align: left;
}
.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--primary-200);
}
.feature-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 14px;
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}
.feature-card p {
  font-size: 13px;
  color: var(--gray-500);
  line-height: 1.6;
}
.feature-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 10px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 10px;
  background: var(--primary-50);
  color: var(--primary-500);
}

/* ===== FREE TRIAL ===== */
.section-free-trial {
  text-align: center;
  background: white;
}
.trial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}
.trial-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  cursor: pointer;
  transition: all 0.3s;
  text-align: left;
}
.trial-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: var(--primary-300);
}
.trial-icon {
  font-size: 32px;
  margin-bottom: 12px;
}
.trial-card h3 {
  font-size: 18px;
  margin-bottom: 6px;
}
.trial-card > p {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 20px;
}
.trial-preview {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 16px;
}
.trial-preview-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-600);
  flex-wrap: wrap;
}
.trial-preview-arrow {
  text-align: center;
  color: var(--primary-300);
  font-size: 16px;
  padding: 4px 0;
}
.trial-preview-image span {
  background: var(--primary-50);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--primary-600);
}
.trial-action {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-500);
}

/* ===== WORKSPACE ===== */
.section-workspace {
  background: var(--gray-50);
  text-align: center;
}
.tool-tabs {
  display: flex;
  gap: 3px;
  background: white;
  padding: 4px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  margin-bottom: 28px;
  overflow-x: auto;
}
.tool-tab {
  padding: 10px 22px;
  border: none;
  background: transparent;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 6px;
  color: var(--gray-500);
  transition: all 0.2s;
  white-space: nowrap;
  font-family: inherit;
}
.tool-tab:hover { color: var(--gray-700); }
.tool-tab.active {
  background: var(--primary-50);
  color: var(--primary-600);
  font-weight: 600;
}
.tool-panel { display: none; text-align: left; }
.tool-panel.active { display: block; }

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}
.panel-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 2px;
}
.panel-desc {
  font-size: 14px;
  color: var(--gray-500);
}
.quota-badge {
  font-size: 12px;
  font-weight: 600;
  background: var(--primary-50);
  color: var(--primary-600);
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--primary-100);
  white-space: nowrap;
}

/* Input Card */
.input-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
}
.prompt-input {
  width: 100%;
  min-height: 130px;
  padding: 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1.7;
  font-family: inherit;
  resize: vertical;
  transition: all 0.2s;
  background: var(--gray-50);
}
.prompt-input:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
  background: white;
}
.input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 14px;
  flex-wrap: wrap;
  gap: 10px;
}
.input-hints {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.hint-tag {
  font-size: 12px;
  padding: 4px 12px;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 14px;
  color: var(--gray-500);
  cursor: pointer;
  transition: all 0.2s;
}
.hint-tag:hover {
  background: var(--primary-50);
  border-color: var(--primary-200);
  color: var(--primary-600);
}
.shortcut-hint {
  font-size: 12px;
  color: var(--gray-400);
  text-align: right;
  margin-top: 6px;
}

/* Style Selector */
.style-selector {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.style-selector label {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-600);
}
.style-selector select {
  padding: 8px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background: white;
  font-family: inherit;
  color: var(--gray-700);
}

/* Loading */
.loading-area {
  text-align: center;
  padding: 48px;
}
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary-500);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Result Area */
.result-area {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 16px;
}
.result-content {
  padding: 20px;
  line-height: 1.8;
  white-space: pre-wrap;
  font-size: 15px;
}
.result-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--gray-200);
  background: var(--gray-50);
  flex-wrap: wrap;
  gap: 8px;
}
.result-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
}
.result-actions {
  display: flex;
  gap: 8px;
}

/* Image Result */
.image-result-card {
  padding: 24px;
  text-align: center;
}
.image-preview {
  max-width: 100%;
  max-height: 500px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  margin-bottom: 16px;
}
.image-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

/* Voice */
.voice-player {
  padding: 24px;
  text-align: center;
}
.voice-player audio { width: 100%; margin-bottom: 12px; }
.voice-meta { font-size: 13px; color: var(--gray-500); margin-bottom: 12px; }

/* Video */
.video-intro-card {
  display: flex;
  gap: 20px;
  background: linear-gradient(135deg, var(--primary-50), #faf5ff);
  border: 1px solid var(--primary-100);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  text-align: left;
}
.video-intro-icon {
  font-size: 40px;
  flex-shrink: 0;
}
.video-intro-text h4 {
  font-size: 17px;
  margin-bottom: 6px;
}
.video-intro-text p {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 10px;
}
.video-intro-text ul {
  list-style: none;
}
.video-intro-text li {
  font-size: 13px;
  color: var(--gray-600);
  padding: 3px 0;
}
.video-result-card {
  padding: 24px;
  text-align: center;
}
.video-player-placeholder {
  background: var(--gray-100);
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius);
  padding: 48px;
  margin-bottom: 16px;
}
.video-placeholder-icon { font-size: 48px; margin-bottom: 12px; }

/* Vault */
.vault-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-500);
}
.empty-icon { font-size: 48px; margin-bottom: 12px; }

/* ===== TRUST SECTION ===== */
.section-trust {
  background: white;
  text-align: center;
}
.trust-header { margin-bottom: 40px; }
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.trust-card {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  transition: all 0.3s;
}
.trust-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.trust-number {
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}
.trust-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 2px;
}
.trust-sub {
  font-size: 12px;
  color: var(--gray-400);
}

/* ===== PRICING ===== */
.section-pricing {
  background: var(--gray-50);
  text-align: center;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 960px;
  margin: 0 auto 24px;
  align-items: start;
}
.pricing-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: left;
  transition: all 0.3s;
  position: relative;
}
.pricing-card:hover {
  box-shadow: var(--shadow-lg);
}
.pricing-card.featured {
  border-color: var(--primary-400);
  box-shadow: 0 0 0 1px var(--primary-400), var(--shadow-md);
  transform: scale(1.03);
}
.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
  color: white;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 20px;
  border-radius: 12px;
  white-space: nowrap;
}
.pricing-card h3 {
  font-size: 20px;
  margin-bottom: 8px;
}
.price {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 2px;
  letter-spacing: -1px;
}
.price-unit {
  font-size: 16px;
  font-weight: 400;
  color: var(--gray-400);
}
.price-desc {
  font-size: 13px;
  color: var(--gray-400);
  margin-bottom: 20px;
}
.price-save {
  color: var(--success);
  font-weight: 600;
}
.pricing-features {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}
.pricing-features li {
  padding: 8px 0;
  font-size: 14px;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  gap: 8px;
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-features li.yes::before {
  content: '✅';
  font-size: 13px;
}
.pricing-features li.no::before {
  content: '❌';
  font-size: 13px;
}
.pricing-features li.trial::before {
  content: '🎁';
  font-size: 13px;
}
.pricing-card .btn { width: 100%; margin-top: 4px; }
.pricing-note {
  text-align: center;
  font-size: 13px;
  color: var(--gray-400);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== FAQ ===== */
.section-faq {
  text-align: center;
  background: white;
}
.faq-list {
  max-width: 680px;
  margin: 40px auto 0;
  text-align: left;
}
.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: none;
  border: none;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  color: var(--gray-800);
  transition: background 0.2s;
}
.faq-question:hover { background: var(--gray-50); }
.faq-icon {
  font-size: 20px;
  color: var(--gray-400);
  transition: transform 0.3s;
  font-weight: 300;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}
.faq-item.open .faq-answer {
  max-height: 300px;
}
.faq-answer p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* ===== CTA ===== */
.section-cta {
  text-align: center;
  background: linear-gradient(135deg, var(--primary-800), var(--primary-600), var(--accent-500));
  color: white;
  padding: 100px 0;
}
.cta-content h2 {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 12px;
}
.cta-content p {
  font-size: 17px;
  opacity: 0.85;
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.cta-note {
  font-size: 13px;
  opacity: 0.6;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 48px 0 32px;
}
.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.footer-brand .logo {
  color: white;
  margin-bottom: 8px;
}
.footer-tagline {
  font-size: 13px;
  color: var(--gray-500);
  margin-top: 4px;
}
.footer-links {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: white;
  margin-bottom: 12px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--gray-400);
  padding: 4px 0;
  transition: color 0.2s;
}
.footer-col a:hover { color: white; }
.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-bottom p {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 4px;
}
.footer-muted { font-size: 12px; }
.beian-status {
  color: var(--warm-400);
  font-weight: 500;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-split { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .hero-visual .pipeline-visual { max-width: 500px; margin: 0 auto; }
  .hero-title { font-size: 42px; }
  .showcase-grid { grid-template-columns: 1fr 1fr; }
  .trial-grid { grid-template-columns: 1fr 1fr; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: 20px;
    box-shadow: var(--shadow-lg);
    gap: 16px;
    z-index: 999;
  }
  .mobile-menu-btn { display: flex; }

  .container { padding: 0 16px; }
  .section { padding: 60px 0; }
  .section-title { font-size: 28px; }
  
  .hero { min-height: auto; padding: 80px 0 40px; }
  .hero-title { font-size: 32px; }
  .hero-desc { font-size: 15px; }
  .hero-stats-row { flex-wrap: wrap; gap: 16px; }
  .hero-stat-divider { display: none; }
  
  .pipeline-visual { padding: 20px; flex-direction: column; }
  .pipeline-arrow { transform: rotate(90deg); }
  
  .showcase-grid { grid-template-columns: 1fr; }
  .steps-row { flex-direction: column; gap: 20px; }
  .step-connector { transform: rotate(90deg); width: auto; }
  .trial-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
  .pricing-card.featured { transform: none; }
  .features-row { grid-template-columns: 1fr; }
  .footer-content { flex-direction: column; gap: 32px; }
  .footer-links { gap: 32px; }
  .video-intro-card { flex-direction: column; }
  .tool-tab { padding: 8px 14px; font-size: 13px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .section-title { font-size: 24px; }
  .trust-grid { grid-template-columns: 1fr; }
  .cta-content h2 { font-size: 28px; }
}