/* ============================================
   呼吸视界.ai Clone - Shared Styles
   ============================================ */

/* CSS Variables / Design Tokens */
:root {
  --primary: #6C3FFF;
  --primary-light: #8A5FFF;
  --primary-dark: #5B2FEF;
  --accent-pink: #EC4899;
  --accent-purple: #A855F7;
  --gradient: linear-gradient(135deg, #6C3FFF 0%, #A855F7 50%, #EC4899 100%);
  --gradient-soft: linear-gradient(135deg, rgba(108,63,255,0.15) 0%, rgba(168,85,247,0.15) 50%, rgba(236,72,153,0.15) 100%);
  --bg-dark: #0A0A14;
  --bg-card: #12121E;
  --bg-card-hover: #1a1a2e;
  --bg-overlay: rgba(10, 10, 20, 0.85);
  --text-primary: #FFFFFF;
  --text-secondary: #A0A0C0;
  --text-muted: #6B6B8A;
  --border-color: rgba(255,255,255,0.08);
  --border-glow: rgba(108,63,255,0.3);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(108,63,255,0.2);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  border: none;
  outline: none;
  font-family: var(--font-sans);
}

input, textarea, select {
  font-family: var(--font-sans);
}

img, video {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

/* ============================================
   Layout Utilities
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-sm {
  padding: 48px 0;
}

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

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

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }

/* ============================================
   Navigation Bar
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
  height: 64px;
  background: rgba(10, 10, 20, 0.2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  /* border-bottom: 1px solid var(--border-color); */
  transition: var(--transition);
}

.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.navbar-logo svg {
  width: 32px;
  height: 32px;
}

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

.navbar-nav a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(108,63,255,0.4);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(108,63,255,0.5);
}

.btn-ghost {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.15);
}

.btn-outline {
  background: transparent;
  color: var(--primary-light);
  border: 1.5px solid var(--primary);
}

.btn-outline:hover {
  background: rgba(108,63,255,0.1);
}

.btn-lg {
  padding: 12px 32px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 100px 24px 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-gradient-mask {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(108,63,255,0.25) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(168,85,247,0.12) 0%, transparent 50%),
    radial-gradient(ellipse 50% 30% at 20% 80%, rgba(236,72,153,0.08) 0%, transparent 50%),
    linear-gradient(to bottom, rgba(8,8,15,0.2) 0%, rgba(8,8,15,0.5) 100%);
  z-index: 1;
  pointer-events: none;
}

.hero-grid-overlay {
  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 80% 80% at 50% 50%, black 30%, transparent 80%);
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--gradient);
  opacity: 0.4;
  animation: floatParticle linear infinite;
}

@keyframes floatParticle {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 0.4; }
  90% { opacity: 0.4; }
  100% { transform: translateY(-10vh) rotate(720deg); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 100px;
  background: rgba(108,63,255,0.15);
  border: 1px solid rgba(108,63,255,0.3);
  font-size: 13px;
  color: var(--primary-light);
  margin-bottom: 24px;
  animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(108,63,255,0.2); }
  50% { box-shadow: 0 0 0 8px rgba(108,63,255,0); }
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-pink);
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

/* ============================================
   Section Headers
   ============================================ */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

.section-header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  margin-bottom: 32px;
}

.section-header-flex h2 {
  margin-bottom: 0;
}

.section-header-flex p {
  margin: 4px 0 0;
  font-size: 14px;
}

/* ============================================
   AI Capabilities Section
   ============================================ */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.capability-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.capability-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-soft);
  opacity: 0;
  transition: var(--transition);
}

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

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

.capability-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.capability-icon.purple { background: rgba(108,63,255,0.15); }
.capability-icon.pink { background: rgba(236,72,153,0.15); }
.capability-icon.blue { background: rgba(59,130,246,0.15); }
.capability-icon.green { background: rgba(16,185,129,0.15); }
.capability-icon.orange { background: rgba(249,115,22,0.15); }
.capability-icon.cyan { background: rgba(6,182,212,0.15); }

.capability-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.capability-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ============================================
   Workflow Section
   ============================================ */
.workflow-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.workflow-step {
  text-align: center;
  flex: 1;
  min-width: 140px;
  max-width: 180px;
  padding: 0 12px;
}

.step-number {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.step-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto 16px;
  transition: var(--transition);
  position: relative;
}

.workflow-step:hover .step-icon {
  border-color: var(--primary);
  box-shadow: 0 0 30px rgba(108,63,255,0.3);
  transform: scale(1.08);
}

.step-icon::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px dashed rgba(108,63,255,0.3);
  opacity: 0;
  transition: var(--transition);
}

.workflow-step:hover .step-icon::after {
  opacity: 1;
}

.workflow-step h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.workflow-step p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.workflow-connector {
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent-pink));
  margin-top: 36px;
  flex-shrink: 0;
  position: relative;
}

.workflow-connector::before {
  content: '';
  position: absolute;
  right: -2px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--accent-pink);
  border-top: 2px solid var(--accent-pink);
  transform: rotate(45deg);
}

@media (max-width: 900px) {
  .workflow-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  
  .workflow-connector {
    display: none;
  }
  
  .workflow-step {
    max-width: none;
  }
}

@media (max-width: 600px) {
  .workflow-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   Styles Section
   ============================================ */
.styles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
}

.style-item {
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  text-align: center;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: default;
}

.style-item:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(108,63,255,0.2);
}

/* ============================================
   Feature Cards
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-soft);
  opacity: 0;
  transition: var(--transition);
}

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

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.feature-icon.purple { background: rgba(108,63,255,0.15); }
.feature-icon.pink { background: rgba(236,72,153,0.15); }
.feature-icon.blue { background: rgba(59,130,246,0.15); }
.feature-icon.green { background: rgba(16,185,129,0.15); }

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ============================================
   Works Grid
   ============================================ */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.work-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}

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

.work-thumb {
  position: relative;
  aspect-ratio: 9/16;
  overflow: hidden;
}

.work-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.work-thumb .thumb-bg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: rgba(255,255,255,0.5);
}

.t1 { background: linear-gradient(135deg, #1a1a3e, #2d1b69); }
.t2 { background: linear-gradient(135deg, #1e2a3a, #0d4f6b); }
.t3 { background: linear-gradient(135deg, #2a1a1a, #6b1a1a); }
.t4 { background: linear-gradient(135deg, #1a2a1a, #1a5a2a); }
.t5 { background: linear-gradient(135deg, #2a1a2a, #5a1a5a); }
.t6 { background: linear-gradient(135deg, #1a1a2a, #1a2a5a); }
.t7 { background: linear-gradient(135deg, #2a2010, #5a4010); }
.t8 { background: linear-gradient(135deg, #102020, #104040); }
.t9 { background: linear-gradient(135deg, #201a10, #403010); }
.t10 { background: linear-gradient(135deg, #101020, #201040); }

.work-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.2);
  opacity: 0;
  transition: var(--transition);
}

.work-card:hover .work-play {
  opacity: 1;
}

.play-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
}

.work-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(0,0,0,0.6);
  font-size: 12px;
  font-weight: 500;
  color: white;
}

.work-tags {
  position: absolute;
  top: 8px;
  left: 8px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.work-tag {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.work-tag.sd { background: rgba(108,63,255,0.8); color: white; }
.work-tag.featured { background: rgba(236,72,153,0.8); color: white; }
.work-tag.real { background: rgba(59,130,246,0.8); color: white; }
.work-tag.ad { background: rgba(16,185,129,0.8); color: white; }
.work-tag.seedance { background: rgba(249,115,22,0.8); color: white; }

.work-info {
  padding: 12px;
}

.work-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.work-author {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.clone-btn {
  width: 100%;
  padding: 7px 0;
  border-radius: var(--radius-sm);
  background: rgba(108,63,255,0.1);
  border: 1px solid rgba(108,63,255,0.3);
  color: var(--primary-light);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-sans);
  transition: var(--transition);
}

.clone-btn:hover {
  background: rgba(108,63,255,0.2);
}

.clone-btn.cloned {
  background: rgba(16,185,129,0.15);
  border-color: rgba(16,185,129,0.3);
  color: #10b981;
}

/* ============================================
   Tutorials Grid
   ============================================ */
.tutorials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.tutorial-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: pointer;
}

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

.tutorial-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}

.tutorial-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tutorial-thumb .thumb-bg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: rgba(255,255,255,0.4);
}

.tutorial-card:hover .work-play {
  opacity: 1;
}

.tutorial-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(0,0,0,0.7);
  font-size: 12px;
  font-weight: 500;
  color: white;
}

.tutorial-info {
  padding: 16px;
}

.tutorial-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tutorial-desc {
  font-size: 13px;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
  position: relative;
  padding: 100px 24px;
  text-align: center;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient);
  opacity: 0.08;
}

.cta-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 50%, rgba(168,85,247,0.3), transparent);
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 36px;
  color: rgba(255,255,255,0.9);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: 60px 0 30px;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand-logo {
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 280px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 13px;
  color: var(--text-muted);
}

/* ============================================
   Search Bar
   ============================================ */
.search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  max-width: 400px;
  margin: 0 auto;
}

.search-bar input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 14px;
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

.search-bar svg {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

/* ============================================
   Tabs
   ============================================ */
.tabs {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius-md);
  padding: 4px;
}

.tab-btn {
  flex: 1;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  transition: var(--transition);
}

.tab-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

/* ============================================
   Form Elements
   ============================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(108,63,255,0.05);
}

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

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

/* ============================================
   Cards (Generic)
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
}

/* ============================================
   Badges / Pills
   ============================================ */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
}

.pill-purple {
  background: rgba(108,63,255,0.15);
  color: var(--primary-light);
}

.pill-green {
  background: rgba(16,185,129,0.15);
  color: #10b981;
}

.pill-yellow {
  background: rgba(234,179,8,0.15);
  color: #eab308;
}

/* ============================================
   Loading Spinner
   ============================================ */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.1);
  border-top-color: var(--primary-light);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   Page Header
   ============================================ */
.page-header {
  padding: 120px 0 60px;
  text-align: center;
  background: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(108,63,255,0.15) 0%, transparent 70%);
}

.page-header h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 16px;
  color: var(--text-secondary);
}

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

.auth-page .hero-bg,
.auth-page .hero-grid-overlay {
  position: fixed;
}

.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.auth-card h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-card .auth-sub {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.auth-tabs {
  display: flex;
  gap: 4px;
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 28px;
}

.auth-tab {
  flex: 1;
  padding: 9px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  transition: var(--transition);
  text-align: center;
}

.auth-tab.active {
  background: rgba(108,63,255,0.15);
  color: var(--primary-light);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.auth-form .form-input {
  padding: 12px 16px;
}

.phone-input-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.country-code {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-primary);
  cursor: pointer;
  white-space: nowrap;
  min-width: 60px;
  justify-content: center;
}

.country-code select {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  outline: none;
}

.country-code select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

.phone-input-group .form-input {
  flex: 1;
}

.sms-btn {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: rgba(108,63,255,0.15);
  border: 1px solid rgba(108,63,255,0.3);
  color: var(--primary-light);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: var(--transition);
  min-width: 110px;
  text-align: center;
}

.sms-btn:hover {
  background: rgba(108,63,255,0.25);
}

.sms-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.password-toggle {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 16px;
  padding: 4px;
}

.input-wrapper {
  position: relative;
}

.input-wrapper .form-input {
  padding-right: 44px;
}

.auth-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 8px;
}

.auth-links .btn {
  width: 100%;
}

.auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--primary-light);
}

.auth-hero-text {
  text-align: center;
  margin-bottom: 32px;
}

.auth-hero-text h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.auth-hero-text p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ============================================
   Works Page
   ============================================ */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.filter-btn {
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition);
}

.filter-btn.active,
.filter-btn:hover {
  background: rgba(108,63,255,0.15);
  border-color: rgba(108,63,255,0.3);
  color: var(--primary-light);
}

/* ============================================
   Workspace Page
   ============================================ */
.workspace-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: calc(100vh - 64px);
  margin-top: 64px;
}

.workspace-sidebar {
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  padding: 20px 12px;
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
}

.workspace-main {
  padding: 24px;
  overflow-y: auto;
}

.workspace-section-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 8px;
  margin-bottom: 8px;
}

.workspace-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 2px;
}

.workspace-item:hover,
.workspace-item.active {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
}

.workspace-item.active {
  color: var(--primary-light);
  background: rgba(108,63,255,0.1);
}

.workspace-item-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  background: rgba(255,255,255,0.04);
  flex-shrink: 0;
}

.workspace-create-btn {
  width: 100%;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: rgba(108,63,255,0.1);
  border: 1px dashed rgba(108,63,255,0.3);
  color: var(--primary-light);
  font-size: 14px;
  font-weight: 500;
  margin-top: 8px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-sans);
}

.workspace-create-btn:hover {
  background: rgba(108,63,255,0.2);
}

/* Canvas area mock */
.canvas-area {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  position: relative;
}

.canvas-placeholder {
  font-size: 48px;
  opacity: 0.3;
}

.canvas-placeholder-text {
  color: var(--text-secondary);
  font-size: 16px;
}

.canvas-tools {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  background: rgba(18,18,30,0.9);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 8px 16px;
  backdrop-filter: blur(12px);
}

.canvas-tool-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-secondary);
  font-size: 18px;
  transition: var(--transition);
}

.canvas-tool-btn:hover,
.canvas-tool-btn.active {
  background: rgba(108,63,255,0.15);
  color: var(--primary-light);
}

/* ============================================
   Pricing Page
   ============================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 40px rgba(108,63,255,0.2);
}

.pricing-card.featured::before {
  content: '最受欢迎';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  border-radius: 100px;
  background: var(--gradient);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.pricing-plan {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
}

.pricing-price .amount {
  font-size: 48px;
  font-weight: 800;
}

.pricing-price .unit {
  font-size: 16px;
  color: var(--text-secondary);
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  margin-bottom: 28px;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.pricing-feature .check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(16,185,129,0.15);
  color: #10b981;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  flex-shrink: 0;
}

.pricing-feature.disabled {
  opacity: 0.4;
}

.pricing-feature.disabled .check {
  background: rgba(255,255,255,0.06);
  color: var(--text-muted);
}

/* ============================================
   Legal Pages
   ============================================ */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--text-primary);
}

.legal-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 8px;
  color: var(--text-primary);
}

.legal-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}

.legal-content ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 12px;
}

.legal-content li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 4px;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .navbar-nav {
    display: none;
  }

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

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

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

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

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

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

  .workspace-sidebar {
    display: none;
  }

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

  .section {
    padding: 60px 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .auth-card {
    padding: 28px 20px;
  }

  .works-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
}

/* ============================================
   About Page
   ============================================ */
.about-intro {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
}

.about-intro-content h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
}

.about-intro-content p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-intro-visual {
  display: flex;
  gap: 20px;
}

.about-visual-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  min-width: 100px;
}

.about-visual-number {
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.about-visual-label {
  font-size: 13px;
  color: var(--text-secondary);
}

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

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
}

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

.about-card-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.about-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.about-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}

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

.tech-icon {
  font-size: 28px;
  margin-bottom: 16px;
}

.tech-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

.culture-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}

.culture-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.culture-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.6;
  flex-shrink: 0;
}

.culture-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

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

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}

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

.why-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.why-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
}

.why-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.jobs-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.job-category {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 28px;
}

.job-category-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

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

.job-card:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.job-card:first-of-type {
  padding-top: 0;
}

.job-title {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 8px;
}

.job-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.job-tag {
  font-size: 12px;
  padding: 3px 10px;
  background: rgba(255,255,255,0.05);
  border-radius: 100px;
  color: var(--text-secondary);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.benefit-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

.benefit-item:hover {
  border-color: var(--border-glow);
}

.benefit-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.benefit-item h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.benefit-item p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================================
   Help Page
   ============================================ */
.help-search {
  display: flex;
  gap: 12px;
  max-width: 600px;
  margin: 0 auto;
}

.help-search-input {
  flex: 1;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  transition: var(--transition);
}

.help-search-input:focus {
  outline: none;
  border-color: var(--primary);
}

.help-search-input::placeholder {
  color: var(--text-muted);
}

.quick-links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.quick-link-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: var(--transition);
  text-align: center;
}

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

.quick-link-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.quick-link-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.quick-link-card p {
  font-size: 13px;
  color: var(--text-secondary);
}

.help-section {
  max-width: 800px;
  margin: 0 auto;
}

.help-section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-question {
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.faq-item:hover .faq-question {
  background: rgba(255,255,255,0.02);
}

.faq-answer {
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

.faq-item.open .faq-question::after {
  content: '−';
}

.faq-question::after {
  content: '+';
  float: right;
  color: var(--primary);
  font-weight: 600;
}

/* ============================================
   Cool Animations
   ============================================ */

/* ---- 3D Card Tilt Effect ---- */
.tilt-card {
  transform-style: preserve-3d;
  perspective: 1000px;
}

.tilt-card-inner {
  transition: transform 0.3s ease;
  transform-style: preserve-3d;
}

.tilt-card:hover .tilt-card-inner {
  transform: rotateX(5deg) rotateY(-5deg) translateZ(10px);
}

.tilt-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    135deg,
    rgba(108, 63, 255, 0.3) 0%,
    transparent 50%,
    rgba(236, 72, 153, 0.3) 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

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

/* ---- Glow Shimmer Effect ---- */
.glow-card {
  position: relative;
  overflow: hidden;
}

.glow-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 30%,
    rgba(108, 63, 255, 0.1) 50%,
    transparent 70%
  );
  transform: translateX(-100%);
  transition: transform 0.6s ease;
  pointer-events: none;
}

.glow-card:hover::after {
  transform: translateX(100%);
}

/* ---- Scale Zoom Effect ---- */
.zoom-card {
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.zoom-card:hover {
  transform: scale(1.05);
}

/* ---- Border Gradient Animation ---- */
.border-animate {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
}

.border-animate::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius-lg) + 2px);
  background: linear-gradient(
    45deg,
    var(--primary),
    var(--accent-purple),
    var(--accent-pink),
    var(--accent-purple),
    var(--primary)
  );
  background-size: 300% 300%;
  animation: borderGradient 3s ease infinite;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.border-animate:hover::before {
  opacity: 1;
}

@keyframes borderGradient {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ---- Pulse Glow Effect ---- */
@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(108, 63, 255, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(108, 63, 255, 0.6),
                0 0 60px rgba(236, 72, 153, 0.3);
  }
}

.pulse-glow {
  animation: pulseGlow 2s ease-in-out infinite;
}

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

.float-animate {
  animation: float 3s ease-in-out infinite;
}

/* ---- Morph Shape Animation ---- */
@keyframes morphShape {
  0%, 100% {
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  }
  50% {
    border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
  }
}

.morph-shape {
  animation: morphShape 4s ease-in-out infinite;
}

/* ---- Reveal Text Animation ---- */
.reveal-text {
  opacity: 0;
  transform: translateY(100%);
  transition: all 0.8s cubic-bezier(0.77, 0, 0.175, 1);
}

.reveal-text.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Glitch Effect ---- */
@keyframes glitch {
  0%, 100% {
    text-shadow:
      2px 0 var(--accent-pink),
      -2px 0 var(--primary);
  }
  25% {
    text-shadow:
      -2px 0 var(--accent-pink),
      2px 0 var(--primary);
  }
  50% {
    text-shadow:
      2px 2px var(--accent-pink),
      -2px -2px var(--primary);
  }
  75% {
    text-shadow:
      -2px 2px var(--accent-pink),
      2px -2px var(--primary);
  }
}

.glitch-text:hover {
  animation: glitch 0.3s ease infinite;
}

/* ---- Background Gradient Animation ---- */
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.gradient-animate {
  background: linear-gradient(
    -45deg,
    var(--bg-dark),
    #1a1a2e,
    #16213e,
    #0f3460
  );
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
}

/* ---- Neon Border Animation ---- */
@keyframes neonBorder {
  0%, 100% {
    box-shadow:
      0 0 5px var(--primary),
      0 0 10px var(--primary),
      0 0 15px var(--primary);
  }
  50% {
    box-shadow:
      0 0 10px var(--accent-pink),
      0 0 20px var(--accent-pink),
      0 0 30px var(--accent-pink);
  }
}

.neon-border {
  animation: neonBorder 2s ease-in-out infinite;
}

/* ---- Spin Animation ---- */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.spin-slow {
  animation: spin 20s linear infinite;
}

/* ---- Bounce Animation ---- */
@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.bounce-in {
  animation: bounceIn 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

/* ---- Stagger Animation ---- */
@keyframes slideUpStagger {
  from {
    opacity: 0;
    transform: translateY(60px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stagger-item {
  opacity: 0;
}

.stagger-item.animate {
  animation: slideUpStagger 0.6s ease-out forwards;
}

/* ============================================
   Scroll Animations (Enhanced)
   ============================================ */
.scroll-animate {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-animate.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* Section headers animation */
.scroll-animate.animate-in .section-header {
  animation: slideUpBlur 1s ease-out forwards;
}

.scroll-animate.animate-in .section-header-flex {
  animation: scaleInBounce 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes slideUpBlur {
  0% {
    opacity: 0;
    transform: translateY(50px);
    filter: blur(15px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

@keyframes scaleInBounce {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  60% {
    transform: scale(1.03);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Feature cards - 3D Flip Animation (独特的3D翻转) */
.feature-card.scroll-animate.animate-in {
  animation: flipIn 1s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  animation-delay: calc(var(--delay, 0) * 0.2s);
  opacity: 0;
  transform-style: preserve-3d;
  perspective: 1200px;
}

@keyframes flipIn {
  0% {
    opacity: 0;
    transform: rotateY(-120deg) rotateX(20deg) scale(0.5);
    filter: blur(20px);
  }
  50% {
    filter: blur(5px);
  }
  100% {
    opacity: 1;
    transform: rotateY(0) rotateX(0) scale(1);
    filter: blur(0);
  }
}

/* Work cards - Pop and Rotate Animation (弹出+轻微旋转) */
.work-card.scroll-animate.animate-in {
  animation: popRotate 0.7s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  animation-delay: calc(var(--delay, 0) * 0.12s);
  opacity: 0;
  transform-origin: center center;
}

@keyframes popRotate {
  0% {
    opacity: 0;
    transform: scale(0) rotate(-15deg);
  }
  60% {
    transform: scale(1.15) rotate(3deg);
  }
  80% {
    transform: scale(0.95) rotate(-1deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

/* Tutorial cards - Slide from opposite sides (从两边对向滑入) */
.tutorial-card.scroll-animate.animate-in:nth-child(odd) {
  animation: slideFromLeft 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  animation-delay: calc(var(--delay, 0) * 0.15s);
  opacity: 0;
}

.tutorial-card.scroll-animate.animate-in:nth-child(even) {
  animation: slideFromRight 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  animation-delay: calc(var(--delay, 0) * 0.15s);
  opacity: 0;
}

@keyframes slideFromLeft {
  0% {
    opacity: 0;
    transform: translateX(-150px) translateY(50px) rotate(-10deg) scale(0.8);
  }
  100% {
    opacity: 1;
    transform: translateX(0) translateY(0) rotate(0deg) scale(1);
  }
}

@keyframes slideFromRight {
  0% {
    opacity: 0;
    transform: translateX(150px) translateY(50px) rotate(10deg) scale(0.8);
  }
  100% {
    opacity: 1;
    transform: translateX(0) translateY(0) rotate(0deg) scale(1);
  }
}

/* Hero section special animation */
.hero-content .hero-badge,
.hero-content h1,
.hero-content .hero-sub,
.hero-content .hero-actions {
  opacity: 0;
  transform: translateY(30px);
  animation: heroReveal 0.8s ease-out forwards;
}

.hero-content .hero-badge { animation-delay: 0.3s; }
.hero-content h1 { animation-delay: 0.5s; }
.hero-content .hero-sub { animation-delay: 0.7s; }
.hero-content .hero-actions { animation-delay: 0.9s; }

@keyframes heroReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Cursor Glow Effect
   ============================================ */
.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(108, 63, 255, 0.08) 0%,
    rgba(168, 85, 247, 0.04) 40%,
    transparent 70%
  );
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
}

/* ============================================
   Sparkle Effect
   ============================================ */
.sparkle {
  position: fixed;
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  animation: sparkleAnim 0.6s ease-out forwards;
  box-shadow:
    0 0 6px var(--primary),
    0 0 12px var(--accent-purple),
    0 0 20px var(--accent-pink);
}

@keyframes sparkleAnim {
  0% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
  100% {
    opacity: 0;
    transform: scale(0) translateY(-50px);
  }
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.2);
}

/* ============================================
   Video Modal
   ============================================ */
.video-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}

.video-modal-content {
  position: relative;
  width: 90%;
  max-width: 900px;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.video-modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 28px;
  color: var(--text-secondary);
  cursor: pointer;
  z-index: 10;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  transition: var(--transition);
}

.video-modal-close:hover {
  color: white;
  background: rgba(0, 0, 0, 0.8);
}

#tutorialVideo,
#worksVideo {
  width: 100%;
  display: block;
  max-height: 70vh;
}

@media (max-width: 768px) {
  .video-modal-content {
    width: 95%;
  }
  
  #tutorialVideo {
    max-height: 50vh;
  }
}