/* ============================================================
   SoraLink Official Website — style.css
   Theme: Dark Tech  |  Accent: #6C5CE7 → #00D2FF
   Reference: Vercel / Linear / Stripe
============================================================ */

/* ── 1. CSS Variables ──────────────────────────────────────── */
:root {
  --bg-900:   #0a0e27;
  --bg-800:   #0f1117;
  --bg-700:   #141824;
  --bg-600:   #1a2035;
  --bg-500:   #222840;
  --bg-950:   #020409;

  --purple:   #6C5CE7;
  --cyan:     #00D2FF;
  --light-purple: #a78bfa;

  --grad:     linear-gradient(135deg, #6C5CE7 0%, #00D2FF 100%);
  --grad-text: linear-gradient(135deg, #a78bfa 0%, #6C5CE7 40%, #00D2FF 100%);

  --text-primary:   #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted:     #475569;

  --border:   rgba(255,255,255,0.07);
  --border-hover: rgba(108,92,231,0.4);

  --radius-sm: 0.5rem;
  --radius:    0.875rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(108,92,231,0.15);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ── 2. Base Reset ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background-color: var(--bg-900);
  color: var(--text-primary);
  font-family: 'Inter', 'Space Grotesk', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
button { cursor: pointer; border: none; background: none; }

/* ── 3. Utility Classes ────────────────────────────────────── */
.gradient-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-pad { padding: 6rem 0; }
@media (max-width: 768px) { .section-pad { padding: 4rem 0; } }

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--light-purple);
  background: rgba(108,92,231,0.1);
  border: 1px solid rgba(108,92,231,0.25);
  padding: 0.35rem 0.85rem;
  border-radius: 99px;
  margin-bottom: 1.25rem;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 4rem;
}

.section-title {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.section-subtitle {
  margin-top: 1rem;
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Section Background Glows */
.section-glow {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
.glow-left  { background: radial-gradient(circle, rgba(108,92,231,0.07) 0%, transparent 70%); left: -200px; top: 50%; transform: translateY(-50%); }
.glow-right { background: radial-gradient(circle, rgba(0,210,255,0.06) 0%, transparent 70%); right: -200px; top: 50%; transform: translateY(-50%); }
.glow-center { background: radial-gradient(circle, rgba(108,92,231,0.06) 0%, transparent 70%); left: 50%; top: 50%; transform: translate(-50%,-50%); }

/* Reveal Animation Classes */
.reveal-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal-up.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ── 4. Scroll Progress Bar ────────────────────────────────── */
#scrollProgress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: var(--grad);
  z-index: 99998;
  box-shadow: 0 0 10px rgba(108,92,231,0.6);
  transition: width 0.1s linear;
}

/* ── 5. Loading Screen ─────────────────────────────────────── */
#loadingScreen {
  position: fixed; inset: 0;
  z-index: 99999;
  background: var(--bg-950);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  transition: opacity 0.7s ease, transform 0.7s ease;
}
#loadingScreen.exit { opacity: 0; transform: scale(1.05); pointer-events: none; }
#loadingScreen.done { display: none; }

.loader-bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(108,92,231,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108,92,231,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 65% 65% at 50% 50%, black 0%, transparent 100%);
}
.loader-orb {
  position: absolute; border-radius: 50%; filter: blur(80px); pointer-events: none;
}
.loader-orb-1 {
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(108,92,231,0.16) 0%, transparent 70%);
  top: -120px; left: 50%; transform: translateX(-50%);
  animation: orbFloat 9s ease-in-out infinite;
}
.loader-orb-2 {
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(0,210,255,0.1) 0%, transparent 70%);
  bottom: -60px; right: -60px;
  animation: orbFloat 11s ease-in-out infinite; animation-delay: -5s;
}
@keyframes orbFloat { 0%,100% { transform: translateY(0) translateX(-50%); } 50% { transform: translateY(-30px) translateX(-50%); } }

.loader-inner {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center;
}
.loader-logo-wrap {
  margin-bottom: 1.5rem;
  animation: logoIn 0.6s cubic-bezier(0.34,1.56,0.64,1) forwards;
  opacity: 0; animation-delay: 0.1s;
}
@keyframes logoIn { 0% { opacity:0; transform:scale(0.4) rotate(-15deg); } 100% { opacity:1; transform:scale(1) rotate(0); } }

.loader-brand-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.8rem, 9vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.75rem;
  display: flex; align-items: baseline;
}
.loader-sora {
  background: linear-gradient(135deg, #a78bfa, #6C5CE7);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.loader-link {
  background: linear-gradient(135deg, #6C5CE7, #00D2FF);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.lc {
  display: inline-block; opacity: 0;
  transform: translateY(32px) rotateX(-60deg);
  animation: charIn 0.5s cubic-bezier(0.34,1.56,0.64,1) forwards;
  animation-delay: calc(0.15s + var(--i) * 0.07s);
  transform-origin: bottom center;
}
@keyframes charIn { 0% { opacity:0; transform:translateY(32px) rotateX(-60deg); } 100% { opacity:1; transform:translateY(0) rotateX(0); } }

.loader-sub {
  font-size: 0.8rem; font-weight: 500; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 2rem;
  opacity: 0; animation: fadeUp 0.5s ease forwards; animation-delay: 0.9s;
}
@keyframes fadeUp { 0% { opacity:0; transform:translateY(8px); } 100% { opacity:1; transform:translateY(0); } }

.loader-progress-wrap {
  width: 180px; height: 2px; background: rgba(255,255,255,0.05);
  border-radius: 1px; overflow: hidden; margin-bottom: 1.5rem;
  opacity: 0; animation: fadeUp 0.4s ease forwards; animation-delay: 0.95s;
}
.loader-progress-bar {
  height: 100%; width: 0%; background: var(--grad);
  box-shadow: 0 0 8px rgba(108,92,231,0.7); transition: width 0.1s linear;
}
.loader-dots {
  display: flex; gap: 0.4rem;
  opacity: 0; animation: fadeUp 0.4s ease forwards; animation-delay: 1.05s;
}
.loader-dots span {
  width: 5px; height: 5px; border-radius: 50%;
  background: rgba(108,92,231,0.5);
  animation: dotBounce 1.2s ease-in-out infinite;
}
.loader-dots span:nth-child(1) { animation-delay: 0s; }
.loader-dots span:nth-child(2) { animation-delay: 0.2s; }
.loader-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dotBounce { 0%,100% { transform:translateY(0); background:rgba(108,92,231,0.5); } 50% { transform:translateY(-7px); background:#00D2FF; } }

/* ── 6. Navigation ─────────────────────────────────────────── */
#navbar { transition: var(--transition); }
.nav-inner { transition: var(--transition); }

.nav-glass {
  background: rgba(10,14,39,0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
#navbar.scrolled .nav-inner { @apply nav-glass; }
#navbar.scrolled {
  background: rgba(10,14,39,0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.nav-logo-icon {
  width: 34px; height: 34px;
  background: rgba(108,92,231,0.1);
  border: 1px solid rgba(108,92,231,0.2);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.nav-logo:hover .nav-logo-icon { background: rgba(108,92,231,0.2); border-color: rgba(108,92,231,0.4); }

.nav-link {
  font-size: 0.875rem; font-weight: 500; color: var(--text-secondary);
  transition: var(--transition); position: relative; padding: 0.25rem 0;
}
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
  height: 1.5px; background: var(--grad); transform: scaleX(0);
  transition: transform 0.3s ease; transform-origin: left;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after { transform: scaleX(1); }

.lang-toggle {
  font-size: 0.8rem; font-weight: 500; color: var(--text-muted);
  padding: 0.35rem 0.75rem; border: 1px solid var(--border);
  border-radius: 99px; transition: var(--transition);
}
.lang-toggle:hover { color: var(--text-secondary); border-color: rgba(255,255,255,0.15); }

.btn-nav-cta {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.875rem; font-weight: 600;
  padding: 0.5rem 1.25rem; border-radius: 99px;
  background: var(--grad); color: white;
  box-shadow: 0 0 20px rgba(108,92,231,0.3);
  transition: var(--transition);
}
.btn-nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 24px rgba(108,92,231,0.45); }

/* Hamburger */
.hamburger {
  display: flex; flex-direction: column; gap: 5px;
  padding: 0.5rem; border-radius: var(--radius-sm);
  transition: var(--transition);
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-secondary); border-radius: 1px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1);
  background: rgba(10,14,39,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.mobile-menu.open { max-height: 400px; }
.mobile-menu-inner { padding: 1rem 1.5rem 1.5rem; display: flex; flex-direction: column; gap: 0.25rem; }
.mobile-nav-link {
  display: block; padding: 0.75rem 0.5rem;
  font-size: 1rem; font-weight: 500; color: var(--text-secondary);
  border-bottom: 1px solid var(--border); transition: var(--transition);
}
.mobile-nav-link:hover { color: var(--text-primary); padding-left: 1rem; }
.mobile-menu-divider { height: 1px; background: var(--border); margin: 0.5rem 0; }

/* ── 7. Buttons ────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.95rem; font-weight: 600;
  padding: 0.75rem 1.75rem; border-radius: 99px;
  background: var(--grad); color: white;
  box-shadow: 0 4px 20px rgba(108,92,231,0.35);
  transition: var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(108,92,231,0.5); }
.btn-primary:active { transform: translateY(0); }
.btn-primary.w-full { width: 100%; justify-content: center; }

.btn-outline {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.95rem; font-weight: 600;
  padding: 0.75rem 1.75rem; border-radius: 99px;
  background: transparent; color: var(--text-primary);
  border: 1.5px solid rgba(255,255,255,0.2);
  transition: var(--transition);
}
.btn-outline:hover { border-color: rgba(108,92,231,0.6); background: rgba(108,92,231,0.08); transform: translateY(-2px); }

/* ── 8. Hero Section ───────────────────────────────────────── */
.hero-section {
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  background: var(--bg-900);
}
.hero-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 1;
}

/* Decorative rings */
.hero-deco-ring {
  position: absolute; border-radius: 50%;
  border: 1px solid rgba(108,92,231,0.12);
  pointer-events: none; z-index: 1;
  animation: ringPulse 8s ease-in-out infinite;
}
.hero-ring-1 { width: 600px; height: 600px; top: 50%; left: 50%; transform: translate(-50%,-50%); }
.hero-ring-2 { width: 900px; height: 900px; top: 50%; left: 50%; transform: translate(-50%,-50%); animation-delay: -4s; opacity: 0.5; }
@keyframes ringPulse { 0%,100% { opacity:0.3; transform:translate(-50%,-50%) scale(1); } 50% { opacity:0.6; transform:translate(-50%,-50%) scale(1.02); } }

/* Orbs */
.hero-deco-orb {
  position: absolute; border-radius: 50%; filter: blur(100px);
  pointer-events: none; z-index: 1;
}
.hero-orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(108,92,231,0.15) 0%, transparent 70%);
  top: -100px; left: -100px;
  animation: orbDrift 15s ease-in-out infinite;
}
.hero-orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,210,255,0.1) 0%, transparent 70%);
  bottom: -100px; right: -100px;
  animation: orbDrift 18s ease-in-out infinite; animation-delay: -8s;
}
@keyframes orbDrift { 0%,100% { transform:translate(0,0); } 33% { transform:translate(30px,-20px); } 66% { transform:translate(-20px,30px); } }

.hero-grid-overlay {
  position: absolute; inset: 0; z-index: 1;
  background-image:
    linear-gradient(rgba(108,92,231,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108,92,231,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 0%, transparent 100%);
}

/* Hero Content */
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.8rem; font-weight: 500; letter-spacing: 0.08em;
  color: var(--light-purple);
  background: rgba(108,92,231,0.08);
  border: 1px solid rgba(108,92,231,0.2);
  padding: 0.4rem 1rem; border-radius: 99px; margin-bottom: 1.5rem;
}
.hero-badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--purple);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:0.3; } }

.hero-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto 2.5rem;
}
.hero-subtitle strong { color: var(--text-primary); font-weight: 600; }

.hero-cta-group {
  display: flex; align-items: center; justify-content: center;
  gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem;
}

.hero-social-proof {
  display: flex; align-items: center; justify-content: center;
  gap: 0.75rem;
}
.hero-proof-avatars { display: flex; }
.proof-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700; color: white;
  border: 2px solid var(--bg-900);
  margin-left: -8px;
}
.proof-avatar:first-child { margin-left: 0; }
.hero-proof-text { font-size: 0.875rem; color: var(--text-muted); }
.hero-proof-text strong { color: var(--text-primary); }

/* Scroll Hint */
.hero-scroll-hint {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  z-index: 10; animation: scrollBounce 2s ease-in-out infinite;
}
.scroll-mouse {
  width: 24px; height: 38px; border: 2px solid rgba(255,255,255,0.2);
  border-radius: 12px; display: flex; justify-content: center; padding-top: 6px;
}
.scroll-wheel {
  width: 3px; height: 8px; background: var(--light-purple);
  border-radius: 2px; animation: scrollWheel 1.5s ease-in-out infinite;
}
@keyframes scrollBounce { 0%,100% { transform:translateX(-50%) translateY(0); } 50% { transform:translateX(-50%) translateY(6px); } }
@keyframes scrollWheel { 0%,100% { opacity:1; transform:translateY(0); } 50% { opacity:0.3; transform:translateY(4px); } }

/* ── 9. Trust Metrics ──────────────────────────────────────── */
.metrics-section {
  padding: 2.5rem 0;
  background: var(--bg-800);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.metrics-grid {
  display: flex; align-items: center; justify-content: center;
  flex-wrap: wrap; gap: 0;
}
.metric-item {
  flex: 1; min-width: 140px;
  display: flex; flex-direction: column; align-items: center;
  padding: 1.5rem 1rem; text-align: center;
}
.metric-icon { font-size: 1.5rem; margin-bottom: 0.5rem; }
.metric-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  background: var(--grad-text);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  line-height: 1.1; margin-bottom: 0.35rem;
}
.metric-label { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }
.metric-divider {
  width: 1px; height: 50px;
  background: var(--border); flex-shrink: 0;
}
@media (max-width: 640px) {
  .metrics-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
  .metric-divider { display: none; }
  .metric-item { border: 1px solid var(--border); margin: -0.5px; }
}

/* ── 10. About Section ─────────────────────────────────────── */
.about-para {
  font-size: 1rem; color: var(--text-secondary); line-height: 1.8;
}
.about-para strong { color: var(--text-primary); }

.about-team-tags {
  display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 2rem;
}
.team-tag {
  font-size: 0.8rem; font-weight: 500;
  padding: 0.3rem 0.75rem; border-radius: 99px;
  background: rgba(108,92,231,0.08);
  border: 1px solid rgba(108,92,231,0.2);
  color: var(--light-purple);
}

/* Network Visualization */
.about-visual { display: flex; align-items: center; justify-content: center; }
.network-container {
  position: relative; width: 100%; max-width: 420px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-card), var(--shadow-glow);
}
.network-svg { width: 100%; height: auto; }

.net-line { stroke-dasharray: 200; stroke-dashoffset: 200; animation: drawLine 2s ease forwards; }
.net-line:nth-child(1) { animation-delay: 0.1s; }
.net-line:nth-child(2) { animation-delay: 0.2s; }
.net-line:nth-child(3) { animation-delay: 0.3s; }
.net-line:nth-child(4) { animation-delay: 0.4s; }
.net-line:nth-child(5) { animation-delay: 0.5s; }
.net-line:nth-child(6) { animation-delay: 0.6s; }
@keyframes drawLine { to { stroke-dashoffset: 0; } }

.net-node { animation: nodePulse 3s ease-in-out infinite; }
.net-node:nth-child(odd) { animation-delay: -1.5s; }
@keyframes nodePulse { 0%,100% { opacity:0.9; r:8; } 50% { opacity:0.6; r:6; } }

.net-center { animation: centerPulse 2s ease-in-out infinite; }
@keyframes centerPulse { 0%,100% { r:18; opacity:0.8; } 50% { r:22; opacity:1; } }

.network-label {
  position: absolute; font-size: 0.75rem; font-weight: 600;
  color: var(--text-muted); background: var(--bg-700);
  border: 1px solid var(--border); border-radius: 99px;
  padding: 0.25rem 0.6rem;
}
.network-label-cn { top: 1rem; left: 1rem; }
.network-label-world { bottom: 1rem; right: 1rem; }

/* ── 11. Services Section ──────────────────────────────────── */
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem; position: relative; z-index: 1;
}
@media (max-width: 1024px) { .services-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; } }

.service-card {
  position: relative; overflow: hidden;
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  cursor: default;
}
.service-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), 0 0 30px rgba(108,92,231,0.1);
}
.service-card-glow {
  position: absolute; inset: 0; opacity: 0;
  background: radial-gradient(circle at 50% 0%, rgba(108,92,231,0.08) 0%, transparent 60%);
  transition: opacity 0.4s ease;
}
.service-card:hover .service-card-glow { opacity: 1; }

.service-card-featured {
  border-color: rgba(108,92,231,0.35);
  background: linear-gradient(135deg, rgba(108,92,231,0.06) 0%, rgba(0,210,255,0.04) 100%);
  box-shadow: 0 0 40px rgba(108,92,231,0.1);
}
.service-glow-featured {
  background: radial-gradient(circle at 50% 0%, rgba(108,92,231,0.12) 0%, transparent 60%);
  opacity: 1;
}
.service-card-featured:hover { box-shadow: 0 12px 50px rgba(0,0,0,0.4), 0 0 50px rgba(108,92,231,0.2); }

.service-featured-badge {
  position: absolute; top: 1rem; right: 1rem;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  background: var(--grad); color: white;
  padding: 0.25rem 0.6rem; border-radius: 99px;
}

.service-icon-wrap { margin-bottom: 1.25rem; }
.service-emoji { font-size: 2.25rem; }

.service-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.15rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: 0.75rem; line-height: 1.3;
}
.service-desc { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 1.5rem; }

.service-features { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 1.75rem; }
.service-features li { display: flex; gap: 0.75rem; align-items: flex-start; }
.feature-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--purple); flex-shrink: 0; margin-top: 0.45rem;
}
.feature-dot-cyan { background: var(--cyan); }
.service-features li strong { display: block; font-size: 0.875rem; font-weight: 600; color: var(--text-primary); }
.service-features li span { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }

.service-badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.75rem; font-weight: 600;
  padding: 0.35rem 0.75rem; border-radius: 99px;
}
.service-badge-green { background: rgba(16,185,129,0.1); color: #34d399; border: 1px solid rgba(16,185,129,0.2); }
.service-badge-blue  { background: rgba(0,210,255,0.1); color: #67e8f9; border: 1px solid rgba(0,210,255,0.2); }
.service-badge-gray  { background: rgba(255,255,255,0.05); color: var(--text-muted); border: 1px solid var(--border); }

/* ── 12. Why SoraLink ──────────────────────────────────────── */
.why-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem; position: relative; z-index: 1;
}
@media (max-width: 1024px) { .why-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; } }

.why-card {
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem; transition: var(--transition);
}
.why-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), 0 0 30px rgba(108,92,231,0.08);
}
.why-icon { font-size: 2.5rem; margin-bottom: 1.25rem; }
.why-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: 0.75rem;
}
.why-desc { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.75; margin-bottom: 1.25rem; }
.why-highlight {
  font-size: 0.875rem; color: var(--text-muted);
  padding-top: 1rem; border-top: 1px solid var(--border);
}

/* ── 13. Cases Section ─────────────────────────────────────── */
.cases-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem; position: relative; z-index: 1; margin-bottom: 2rem;
}
@media (max-width: 1024px) { .cases-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto 2rem; } }

.case-card {
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden; transition: var(--transition);
}
.case-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
}

.case-top-bar { height: 4px; }
.case-bar-game { background: linear-gradient(90deg, #6C5CE7, #a78bfa); }
.case-bar-tech { background: linear-gradient(90deg, #00D2FF, #0984e3); }
.case-bar-saas { background: linear-gradient(90deg, #00b894, #00cec9); }

.case-content { padding: 1.75rem; }
.case-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }

.case-type-tag {
  font-size: 0.75rem; font-weight: 600;
  padding: 0.25rem 0.6rem; border-radius: 99px;
}
.case-tag-game { background: rgba(108,92,231,0.15); color: var(--light-purple); border: 1px solid rgba(108,92,231,0.25); }
.case-tag-tech { background: rgba(0,210,255,0.1); color: #67e8f9; border: 1px solid rgba(0,210,255,0.2); }
.case-tag-saas { background: rgba(0,184,148,0.1); color: #6ee7b7; border: 1px solid rgba(0,184,148,0.2); }

.case-region { font-size: 0.75rem; color: var(--text-muted); }

.case-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: 0.75rem; line-height: 1.4;
}
.case-challenge, .case-strategy {
  font-size: 0.85rem; color: var(--text-secondary);
  line-height: 1.65; margin-bottom: 0.5rem;
}
.case-challenge strong, .case-strategy strong { color: var(--text-primary); }

.case-results {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem; margin-top: 1.25rem;
  padding-top: 1.25rem; border-top: 1px solid var(--border);
}
.case-result-item { text-align: center; }
.result-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem; font-weight: 800; line-height: 1.1; margin-bottom: 0.25rem;
}
.result-label { font-size: 0.7rem; color: var(--text-muted); line-height: 1.3; }

.cases-disclaimer {
  text-align: center; font-size: 0.8rem; color: var(--text-muted);
  position: relative; z-index: 1;
}

/* ── 14. AI Platform Preview ───────────────────────────────── */
.platform-mockup-wrap {
  perspective: 1200px; margin-bottom: 3rem;
}
.platform-mockup {
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,0.6), 0 0 60px rgba(108,92,231,0.1);
  transform: rotateX(4deg) rotateY(-2deg);
  transition: transform 0.5s ease;
  max-width: 900px; margin: 0 auto;
}
.platform-mockup:hover { transform: rotateX(0) rotateY(0); }

.mockup-chrome {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--bg-800);
  border-bottom: 1px solid var(--border);
}
.chrome-dots { display: flex; gap: 0.4rem; }
.chrome-dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }
.chrome-url {
  flex: 1; display: flex; align-items: center; gap: 0.5rem;
  background: var(--bg-900); border-radius: 6px;
  padding: 0.3rem 0.75rem; font-size: 0.75rem; color: var(--text-muted);
  max-width: 300px;
}

.mockup-body { display: flex; min-height: 380px; }

.mockup-sidebar {
  width: 160px; flex-shrink: 0;
  background: var(--bg-800);
  border-right: 1px solid var(--border);
  padding: 1rem;
}
.sidebar-logo {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.8rem; font-weight: 700; color: var(--text-primary);
  margin-bottom: 1.5rem; padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.sidebar-logo-icon {
  width: 20px; height: 20px; border-radius: 4px;
  background: var(--grad);
}
.sidebar-nav { display: flex; flex-direction: column; gap: 0.25rem; }
.sidebar-nav-item {
  font-size: 0.75rem; font-weight: 500; color: var(--text-muted);
  padding: 0.45rem 0.6rem; border-radius: 6px; transition: var(--transition);
  cursor: pointer;
}
.sidebar-nav-item:hover { background: rgba(255,255,255,0.04); color: var(--text-secondary); }
.sidebar-active { background: rgba(108,92,231,0.12) !important; color: var(--light-purple) !important; }

.mockup-main { flex: 1; padding: 1.25rem; overflow: hidden; }

.mockup-search {
  display: flex; align-items: center; gap: 0.5rem;
  background: var(--bg-800); border: 1px solid var(--border);
  border-radius: 8px; padding: 0.5rem 0.75rem;
  margin-bottom: 1.25rem;
}
.mockup-search-text { flex: 1; font-size: 0.8rem; color: var(--text-muted); }
.mockup-search-badge {
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.05em;
  background: var(--grad); color: white;
  padding: 0.15rem 0.45rem; border-radius: 4px;
}

.mockup-section-title { font-size: 0.8rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 0.75rem; }

.mockup-tools-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem;
}
@media (max-width: 640px) { .mockup-tools-grid { grid-template-columns: repeat(2, 1fr); } }

.mockup-tool-card {
  display: flex; align-items: center; gap: 0.6rem;
  background: var(--bg-900); border: 1px solid var(--border);
  border-radius: 8px; padding: 0.65rem 0.75rem;
  transition: var(--transition); cursor: pointer;
}
.mockup-tool-card:hover { border-color: rgba(108,92,231,0.3); background: rgba(108,92,231,0.04); }
.mockup-tool-coming { opacity: 0.5; }

.tool-icon {
  width: 32px; height: 32px; border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; font-weight: 700; color: white; flex-shrink: 0;
}
.tool-info { min-width: 0; }
.tool-name { font-size: 0.72rem; font-weight: 700; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tool-desc { font-size: 0.65rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tool-tag {
  display: inline-block; font-size: 0.6rem; font-weight: 600;
  background: rgba(108,92,231,0.1); color: var(--light-purple);
  border-radius: 3px; padding: 0.1rem 0.35rem; margin-top: 0.2rem;
}
.tool-tag-coming { background: rgba(255,255,255,0.05); color: var(--text-muted); }

.platform-cta {
  display: flex; align-items: center; justify-content: center;
  gap: 1rem; flex-wrap: wrap;
}

/* ── 15. Contact Section ───────────────────────────────────── */
.contact-layout {
  display: grid; grid-template-columns: 3fr 2fr;
  gap: 3rem; position: relative; z-index: 1;
}
@media (max-width: 1024px) { .contact-layout { grid-template-columns: 1fr; } }

.contact-form-wrap {
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

.form-group { margin-bottom: 1rem; }
.form-label {
  display: block; font-size: 0.85rem; font-weight: 600;
  color: var(--text-secondary); margin-bottom: 0.5rem;
}
.form-required { color: #f87171; }
.form-input {
  width: 100%; background: var(--bg-800);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1rem; font-size: 0.9rem;
  color: var(--text-primary); font-family: inherit;
  transition: var(--transition); outline: none;
}
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus { border-color: rgba(108,92,231,0.5); box-shadow: 0 0 0 3px rgba(108,92,231,0.1); }
.form-select { appearance: none; cursor: pointer; }
.form-textarea { resize: vertical; min-height: 100px; }

.form-error {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1rem; border-radius: var(--radius-sm);
  background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.2);
  color: #fca5a5; font-size: 0.85rem; margin-bottom: 1rem;
}

.form-success {
  text-align: center; padding: 3rem 2rem;
}
.success-icon-wrap {
  width: 64px; height: 64px; border-radius: 50%;
  background: rgba(16,185,129,0.1); border: 2px solid rgba(16,185,129,0.3);
  display: flex; align-items: center; justify-content: center;
  color: #34d399; margin: 0 auto 1.5rem;
}
.form-success h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.75rem; }
.form-success p { color: var(--text-secondary); }

/* Contact Info */
.contact-info { display: flex; flex-direction: column; gap: 1rem; }
.contact-info-card {
  display: flex; align-items: flex-start; gap: 1rem;
  background: var(--bg-700); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem;
  transition: var(--transition);
}
.contact-info-card:hover { border-color: var(--border-hover); }
.contact-info-icon {
  width: 38px; height: 38px; border-radius: 8px; flex-shrink: 0;
  background: rgba(108,92,231,0.1); border: 1px solid rgba(108,92,231,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--light-purple);
}
.contact-info-label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 0.2rem; }
.contact-info-value { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); }
a.contact-info-value:hover { color: var(--light-purple); }

.contact-social { padding: 1rem 0; }
.contact-social-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.75rem; }
.contact-social-links { display: flex; gap: 0.75rem; }
.social-btn {
  width: 38px; height: 38px; border-radius: 8px;
  background: var(--bg-700); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); transition: var(--transition);
}
.social-btn:hover { color: var(--text-primary); border-color: var(--border-hover); background: rgba(108,92,231,0.08); }

.contact-quick-links { display: flex; flex-direction: column; gap: 0.5rem; }
.quick-link {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.875rem; font-weight: 500; color: var(--light-purple);
  padding: 0.6rem 0.75rem; border-radius: var(--radius-sm);
  background: rgba(108,92,231,0.06); border: 1px solid rgba(108,92,231,0.15);
  transition: var(--transition);
}
.quick-link:hover { background: rgba(108,92,231,0.12); border-color: rgba(108,92,231,0.3); }

/* ── 16. Footer ────────────────────────────────────────────── */
.footer {
  background: var(--bg-950);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem; padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; } }
@media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand { display: flex; flex-direction: column; gap: 1rem; }
.footer-logo { display: flex; align-items: center; gap: 0.6rem; }
.footer-brand-desc { font-size: 0.875rem; color: var(--text-muted); line-height: 1.6; max-width: 280px; }
.footer-social { display: flex; gap: 0.6rem; }
.footer-social-link {
  width: 34px; height: 34px; border-radius: 7px;
  background: var(--bg-700); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); transition: var(--transition);
}
.footer-social-link:hover { color: var(--text-primary); border-color: var(--border-hover); }

.footer-col-title { font-size: 0.85rem; font-weight: 700; color: var(--text-primary); margin-bottom: 1.25rem; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
.footer-links a { font-size: 0.875rem; color: var(--text-muted); transition: var(--transition); }
.footer-links a:hover { color: var(--text-secondary); }

.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 2rem; flex-wrap: wrap; gap: 1rem;
}
.footer-bottom p { font-size: 0.8rem; color: var(--text-muted); }
.footer-legal { display: flex; align-items: center; gap: 0.75rem; }
.footer-legal a { font-size: 0.8rem; color: var(--text-muted); transition: var(--transition); }
.footer-legal a:hover { color: var(--text-secondary); }
.footer-legal-dot { width: 3px; height: 3px; border-radius: 50%; background: var(--text-muted); }

/* ── 17. Back to Top ───────────────────────────────────────── */
.back-to-top {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 100;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--grad); color: white;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(108,92,231,0.4);
  opacity: 0; transform: translateY(20px);
  transition: var(--transition); pointer-events: none;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(108,92,231,0.5); }

/* ── 18. Responsive Tweaks ─────────────────────────────────── */
@media (max-width: 768px) {
  .hero-title { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-cta-group { flex-direction: column; align-items: center; }
  .hero-cta-group .btn-primary,
  .hero-cta-group .btn-outline { width: 100%; max-width: 320px; justify-content: center; }
  .platform-mockup { transform: none; }
  .platform-mockup:hover { transform: none; }
  .mockup-sidebar { display: none; }
  .contact-form-wrap { padding: 1.5rem; }
}

@media (max-width: 480px) {
  .section-title { font-size: 1.6rem; }
  .case-results { grid-template-columns: repeat(3, 1fr); }
  .result-value { font-size: 1rem; }
}

/* ── 19. Scrollbar ─────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-900); }
::-webkit-scrollbar-thumb { background: rgba(108,92,231,0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(108,92,231,0.5); }

/* ── 20. Selection ─────────────────────────────────────────── */
::selection { background: rgba(108,92,231,0.3); color: white; }

/* ── 21. i18n — 语言切换相关样式 ──────────────────────────── */

/* 英文模式字体切换 */
body.lang-en {
  font-family: 'Inter', 'Space Grotesk', sans-serif;
  letter-spacing: 0.01em;
}
body.lang-zh {
  font-family: 'Inter', 'Space Grotesk', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* 语言切换按钮 */
.lang-switch-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.7);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.lang-switch-btn:hover {
  color: #fff;
  border-color: rgba(108, 92, 231, 0.6);
  background: rgba(108, 92, 231, 0.1);
  box-shadow: 0 0 12px rgba(108, 92, 231, 0.2);
}

/* 英文版 Hero 副标题行高调整 */
body.lang-en .hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  line-height: 1.75;
}

/* 英文版导航链接字号微调（防止溢出） */
body.lang-en .nav-link {
  font-size: 0.8rem;
  letter-spacing: 0;
}

/* ── Form Validation: input-error red border ─────────────────── */
.form-input.input-error {
  border-color: #ef4444 !important;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.18) !important;
  animation: inputShake 0.35s ease;
}

@keyframes inputShake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-5px); }
  40%       { transform: translateX(5px); }
  60%       { transform: translateX(-4px); }
  80%       { transform: translateX(4px); }
}

/* 错误状态下 label 变红 */
.form-group:has(.input-error) .form-label {
  color: #ef4444;
  transition: color 0.2s ease;
}