/* ==========================================================================
   WOAIL VIP SUITE · 高级暗灰 + 琥珀金主题样式
   ========================================================================== */

/* --- CSS Variables --- */
:root {
  /* Slate palette */
  --slate-950: #020617;
  --slate-900: #0f172a;
  --slate-850: #111a2e;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;

  /* Amber palette */
  --amber-500: #f59e0b;
  --amber-400: #fbbf24;
  --amber-600: #d97706;
  --amber-300: #fcd34d;
  --amber-200: #fde68a;

  /* Functional */
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: rgba(148, 163, 184, 0.15);
  --border-color-strong: rgba(148, 163, 184, 0.25);
  --card-bg: linear-gradient(145deg, rgba(30, 41, 59, 0.6), rgba(15, 23, 42, 0.9));
  --card-bg-solid: #111a2e;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-amber: 0 0 40px rgba(245, 158, 11, 0.15);
  --shadow-amber-strong: 0 0 60px rgba(245, 158, 11, 0.25);

  /* Layout */
  --container-max: 1280px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--slate-900);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

.text-amber {
  color: var(--amber-400);
}

/* --- Layout --- */
.section-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

/* ==========================================================================
   1. HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse at top, rgba(245, 158, 11, 0.08), transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(245, 158, 11, 0.05), transparent 60%),
    linear-gradient(180deg, var(--slate-950) 0%, var(--slate-900) 50%, var(--slate-950) 100%);
  overflow: hidden;
}

/* --- Navbar --- */
.vip-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: all 0.3s ease;
}

.vip-navbar.scrolled {
  padding: 12px 0;
  background: rgba(2, 6, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.vip-nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.vip-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.vip-brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--amber-500), var(--amber-400));
  color: var(--slate-900);
  border-radius: 10px;
  font-weight: 800;
  font-size: 18px;
  box-shadow: var(--shadow-amber);
}

.vip-brand-text {
  color: var(--text-primary);
}

.vip-brand-sub {
  color: var(--amber-400);
  font-weight: 600;
}

.vip-nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.vip-nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.vip-nav-links a:hover {
  color: var(--amber-400);
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--amber-500), var(--amber-400));
  color: var(--slate-900) !important;
  border-radius: 8px;
  font-weight: 600 !important;
  transition: all 0.2s ease;
}

.nav-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-amber-strong);
}

.vip-nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 101;
}

.vip-nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.vip-nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.vip-nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.vip-nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Background Decorations --- */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  pointer-events: none;
  will-change: transform;
}

.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 40%, rgba(245, 158, 11, 0.08), transparent 70%);
  pointer-events: none;
  will-change: transform;
}

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

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  will-change: transform, opacity;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.25), transparent 70%);
  top: -150px;
  left: -100px;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.18), transparent 70%);
  top: 30%;
  right: -150px;
}

.orb-3 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(100, 116, 139, 0.15), transparent 70%);
  bottom: -100px;
  left: 40%;
}

/* --- Hero Content --- */
.hero-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 160px 32px 80px;
  max-width: var(--container-max);
  margin: 0 auto;
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--amber-400);
  margin-bottom: 32px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--amber-500);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--amber-500);
  animation: pulse 2s ease-in-out infinite;
}

.hero-badge-arrow {
  color: var(--amber-500);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 900px;
}

.hero-title-main {
  display: block;
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title-accent {
  background: linear-gradient(135deg, var(--amber-400), var(--amber-500));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title-sub {
  display: block;
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 16px;
  letter-spacing: -0.02em;
}

.hero-description {
  font-size: clamp(15px, 1.5vw, 18px);
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.7;
  margin-bottom: 40px;
}

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

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 12px;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--amber-500), var(--amber-400));
  color: var(--slate-900);
  box-shadow: var(--shadow-amber);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-amber-strong);
}

.btn-secondary {
  background: rgba(148, 163, 184, 0.1);
  color: var(--text-primary);
  border: 1px solid var(--border-color-strong);
}

.btn-secondary:hover {
  background: rgba(148, 163, 184, 0.15);
  border-color: var(--amber-400);
  color: var(--amber-400);
}

.btn-arrow {
  transition: transform 0.2s ease;
}

.btn-primary:hover .btn-arrow,
.btn-secondary:hover .btn-arrow {
  transform: translateX(4px);
}

/* --- Hero Stats --- */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  max-width: 800px;
  width: 100%;
}

.stat-item {
  text-align: center;
  padding: 0 12px;
  border-right: 1px solid var(--border-color);
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 700;
  color: var(--amber-400);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* --- Scroll Indicator --- */
.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.hero-scroll-indicator a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  display: grid;
  place-items: start center;
  padding-top: 6px;
}

.scroll-wheel {
  width: 3px;
  height: 8px;
  background: var(--amber-400);
  border-radius: 2px;
  animation: scrollWheel 1.5s ease-in-out infinite;
}

@keyframes scrollWheel {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

/* ==========================================================================
   2. FEATURES / PRODUCT MATRIX SECTION
   ========================================================================== */
.features-section {
  position: relative;
  padding: 120px 0;
  background: linear-gradient(180deg, var(--slate-900) 0%, var(--slate-950) 100%);
  overflow: hidden;
}

.features-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.3), transparent);
}

/* --- Section Header --- */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.eyebrow-line {
  width: 40px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--text-muted), transparent);
}

.section-title {
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: clamp(14px, 1.5vw, 17px);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 32px;
  align-items: start;
}

/* --- Login Card --- */
.login-card {
  background: var(--card-bg-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
  position: sticky;
  top: 100px;
  box-shadow: var(--shadow-lg);
}

.login-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  padding: 1px;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.3), transparent 50%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.login-card-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.login-status-dot {
  width: 10px;
  height: 10px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(34, 197, 94, 0.6);
  margin-top: 6px;
  animation: pulse 2s ease-in-out infinite;
}

.login-header-text {
  flex: 1;
}

.login-header-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.login-header-sub {
  font-size: 13px;
  color: var(--text-muted);
}

.login-shield {
  color: var(--amber-400);
}

/* --- Form Fields --- */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-field {
  position: relative;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.label-icon {
  color: var(--amber-400);
  display: inline-flex;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--slate-900);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 15px;
  font-family: inherit;
  transition: all 0.2s ease;
  outline: none;
}

.form-input::placeholder {
  color: var(--slate-500);
  font-size: 14px;
}

.form-input:focus {
  border-color: var(--amber-400);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
  background: var(--slate-800);
}

.form-field .toggle-password {
  position: absolute;
  right: 12px;
  top: 42px;
  padding: 6px;
  color: var(--text-muted);
  transition: color 0.2s ease;
  display: inline-flex;
}

.form-field .toggle-password:hover {
  color: var(--amber-400);
}

/* --- Form Options --- */
.form-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: -4px;
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--border-color-strong);
  border-radius: 4px;
  display: grid;
  place-items: center;
  transition: all 0.2s ease;
  background: var(--slate-900);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
  background: var(--amber-500);
  border-color: var(--amber-500);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
  content: '';
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--slate-900);
  border-bottom: 2px solid var(--slate-900);
  transform: rotate(-45deg) translate(1px, -1px);
}

.link-amber {
  font-size: 13px;
  color: var(--amber-400);
  font-weight: 500;
}

.link-amber:hover {
  color: var(--amber-300);
}

/* --- Login Button --- */
.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--amber-500), var(--amber-400));
  color: var(--slate-900);
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  box-shadow: var(--shadow-amber);
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-amber-strong);
}

.btn-login-arrow {
  transition: transform 0.2s ease;
}

.btn-login:hover .btn-login-arrow {
  transform: translateX(4px);
}

.btn-login.loading {
  pointer-events: none;
  opacity: 0.8;
}

.btn-login.loading::before {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid rgba(15, 23, 42, 0.3);
  border-top-color: var(--slate-900);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* --- Login Footer --- */
.login-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 12px;
  color: var(--text-muted);
}

.login-footer .status-dot {
  width: 6px;
  height: 6px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
}

/* --- Product Cards --- */
.product-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.product-card {
  background: var(--card-bg-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--amber-400), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 158, 11, 0.3);
  box-shadow: var(--shadow-amber);
}

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

.product-card-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}

.product-card-tag {
  padding: 4px 10px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 100px;
  font-size: 10px;
  font-weight: 600;
  color: var(--amber-400);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.product-card-tag-alt {
  padding: 4px 10px;
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.product-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(245, 158, 11, 0.05));
  color: var(--amber-400);
}

.product-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.product-card-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.product-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  padding: 14px;
  background: rgba(2, 6, 23, 0.5);
  border-radius: var(--radius-sm);
}

.product-card-meta .meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 80px;
}

.product-card-meta .meta-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-card-meta .meta-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.product-card-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--amber-400);
  transition: gap 0.2s ease;
}

.product-card:hover .product-card-action {
  gap: 12px;
  color: var(--amber-300);
}

/* ==========================================================================
   3. PRICING SECTION
   ========================================================================== */
.pricing-section {
  position: relative;
  padding: 120px 0;
  background: var(--slate-950);
  overflow: hidden;
}

.pricing-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.3), transparent);
}

/* --- Billing Toggle --- */
.billing-toggle {
  display: inline-flex;
  padding: 4px;
  background: var(--slate-800);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  margin: 0 auto 48px;
  display: flex;
  width: fit-content;
}

.billing-btn {
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: 100px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.billing-btn.active {
  background: linear-gradient(135deg, var(--amber-500), var(--amber-400));
  color: var(--slate-900);
}

.billing-save {
  font-size: 11px;
  padding: 2px 8px;
  background: rgba(15, 23, 42, 0.6);
  border-radius: 100px;
  color: var(--amber-400);
  font-weight: 700;
}

.billing-btn.active .billing-save {
  background: rgba(15, 23, 42, 0.3);
  color: var(--slate-900);
}

/* --- Pricing Cards --- */
.pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--card-bg-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}

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

.pricing-card-featured {
  border-color: var(--amber-400);
  box-shadow: var(--shadow-amber);
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.05), var(--slate-900) 30%);
}

.pricing-card-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 16px;
  background: linear-gradient(135deg, var(--amber-500), var(--amber-400));
  color: var(--slate-900);
  font-size: 12px;
  font-weight: 700;
  border-radius: 100px;
  white-space: nowrap;
}

.pricing-card-head {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.pricing-tier-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--amber-400);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.pricing-tier-name {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.pricing-tier-desc {
  font-size: 14px;
  color: var(--text-muted);
}

.pricing-price {
  display: flex;
  align-items: flex-start;
  gap: 4px;
  margin-bottom: 32px;
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--amber-400);
  margin-top: 8px;
}

.price-number {
  font-size: 56px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  letter-spacing: -0.03em;
}

.price-period {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 22px;
  margin-left: 4px;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex: 1;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.feature-item-muted {
  opacity: 0.5;
}

.feature-check {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--amber-400);
}

.feature-check-muted {
  color: var(--text-muted) !important;
}

.pricing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  width: 100%;
}

.pricing-btn-secondary {
  background: rgba(148, 163, 184, 0.1);
  color: var(--text-primary);
  border: 1px solid var(--border-color-strong);
}

.pricing-btn-secondary:hover {
  background: rgba(148, 163, 184, 0.15);
  border-color: var(--amber-400);
  color: var(--amber-400);
}

.pricing-btn-primary {
  background: linear-gradient(135deg, var(--amber-500), var(--amber-400));
  color: var(--slate-900);
  box-shadow: var(--shadow-amber);
}

.pricing-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-amber-strong);
}

/* --- Pricing Note --- */
.pricing-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 48px;
  font-size: 13px;
  color: var(--text-muted);
}

.pricing-note svg {
  color: var(--amber-400);
}

/* ==========================================================================
   4. FAQ SECTION
   ========================================================================== */
.faq-section {
  position: relative;
  padding: 120px 0;
  background: linear-gradient(180deg, var(--slate-950) 0%, var(--slate-900) 100%);
  overflow: hidden;
}

.faq-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.3), transparent);
}

.faq-list {
  max-width: 880px;
  margin: 0 auto 64px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--card-bg-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item[open] {
  border-color: rgba(245, 158, 11, 0.3);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 28px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-q-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--amber-400);
}

.faq-q-text {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-toggle-icon {
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.3s ease;
}

.faq-item[open] .faq-toggle-icon {
  transform: rotate(45deg);
  color: var(--amber-400);
}

.faq-answer {
  padding: 0 28px 24px 76px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-answer p {
  margin-bottom: 0;
}

.code-inline {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.15);
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--amber-300);
}

/* --- FAQ CTA --- */
.faq-cta {
  max-width: 880px;
  margin: 0 auto;
}

.faq-cta-content {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.08), rgba(245, 158, 11, 0.02));
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-xl);
  padding: 48px;
  text-align: center;
}

.faq-cta-title {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.faq-cta-accent {
  color: var(--amber-400);
}

.faq-cta-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.faq-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--amber-500), var(--amber-400));
  color: var(--slate-900);
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-amber);
  transition: all 0.2s ease;
}

.faq-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-amber-strong);
}

/* ==========================================================================
   5. FOOTER
   ========================================================================== */
.vip-footer {
  background: var(--slate-950);
  border-top: 1px solid var(--border-color);
  padding: 64px 0 0;
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px 48px;
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 64px;
}

.footer-brand {
  max-width: 400px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-logo-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--amber-500), var(--amber-400));
  color: var(--slate-900);
  border-radius: 10px;
  font-weight: 800;
  font-size: 18px;
}

.footer-logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

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

.footer-col a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--amber-400);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
}

.footer-bottom-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.footer-bottom-links a:hover {
  color: var(--amber-400);
}

/* ==========================================================================
   6. RESPONSIVE DESIGN
   ========================================================================== */

/* --- Tablets (≤ 1024px) --- */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

  .login-card {
    position: relative;
    top: 0;
    max-width: 500px;
    margin: 0 auto;
  }

  .pricing-cards {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }

  .pricing-card {
    padding: 36px 28px;
  }

  .pricing-card-featured {
    transform: scale(1);
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    padding: 24px;
  }

  .stat-item:nth-child(2) {
    border-right: none;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* --- Mobile Landscape (≤ 768px) --- */
@media (max-width: 768px) {
  .vip-nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: var(--slate-900);
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    padding: 80px 32px 32px;
    gap: 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    align-items: flex-start;
  }

  .vip-nav-links.active {
    transform: translateX(0);
  }

  .vip-nav-links a {
    font-size: 16px;
  }

  .vip-nav-toggle {
    display: flex;
  }

  .hero-content {
    padding: 140px 24px 60px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    max-width: 320px;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .section-container {
    padding: 0 24px;
  }

  .features-section,
  .pricing-section,
  .faq-section {
    padding: 80px 0;
  }

  .section-header {
    margin-bottom: 48px;
  }

  .product-cards {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-bottom-links {
    justify-content: center;
  }

  .faq-question {
    padding: 18px 20px;
    gap: 12px;
  }

  .faq-q-text {
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 20px 20px 64px;
    font-size: 14px;
  }

  .faq-cta-content {
    padding: 36px 24px;
  }

  .billing-toggle {
    flex-direction: column;
    width: 100%;
    max-width: 320px;
    border-radius: 16px;
  }

  .billing-btn {
    width: 100%;
    justify-content: center;
  }

  .hero-scroll-indicator {
    display: none;
  }

  .login-card {
    padding: 28px 24px;
  }

  .price-number {
    font-size: 48px;
  }
}

/* --- Mobile (≤ 480px) --- */
@media (max-width: 480px) {
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    padding: 20px 16px;
    gap: 16px;
  }

  .stat-item {
    padding: 8px 4px;
  }

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

  .section-title {
    font-size: 28px;
  }

  .product-card {
    padding: 24px 20px;
  }

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

  .hero-badge {
    font-size: 12px;
    padding: 6px 14px;
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}