/* ============================================
   DD-DJ Official Website - Modern Redesign
   Based on Landing Page Design Best Practices
   Cross-browser & Multi-device Optimized
   Performance Enhanced & Browser Compatible
   ============================================ */

/* ===== Browser Compatibility Base ===== */
@supports (display: grid) {
  .css-grid { display: block; }
}

/* ===== Performance Optimization ===== */
*,
*::before,
*::after {
  will-change: auto;
}

/* GPU Acceleration for Animations */
.gpu-accelerated {
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* ===== Design Tokens ===== */
:root {
    /* Colors - Indigo primary */
    --brand-50: #EEF2FF;
    --brand-100: #E0E7FF;
    --brand-200: #C7D2FE;
    --brand-300: #A5B4FC;
    --brand-400: #818CF8;
    --brand-500: #6366F1;
    --brand-600: #4F46E5;
    --brand-700: #4338CA;
    --brand-800: #3730A3;
    --brand-900: #312E81;

    --primary: var(--brand-600);
    --primary-hover: var(--brand-700);
    --primary-light: var(--brand-100);
    --primary-dark: var(--brand-800);

    /* Semantic colors */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;

    /* Neutrals */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --gray-950: #030712;

    /* Typography - with fallbacks */
    --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;

    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.25);

    /* Transitions with fallbacks */
    --fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    --container: 1200px;
    --nav-h: 72px;

    /* Safe area insets for notched devices */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
}

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

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  -moz-text-size-adjust:100%;
  text-size-adjust:100%;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation
}

body{
  font-family:var(--font-sans);
  font-size:var(--text-base);
  line-height:var(--leading-normal);
  color:var(--gray-800);
  background:#fff;
  overflow-x:hidden;
  -webkit-overflow-scrolling:touch;
  padding-top:var(--safe-top);
  padding-left:var(--safe-left);
  padding-right:var(--safe-right)
}

a{color:inherit;text-decoration:none;-webkit-text-decoration-skip:ink}
ul{list-style:none}
img,svg{display:block;max-width:100%;height:auto}
button{font-family:inherit;cursor:pointer;border:none;background:none;-webkit-appearance:none;appearance:none}
input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
:focus:not(:focus-visible){outline:none}

/* Selection styling */
::selection{
  background:rgba(99,102,241,0.2);
  color:inherit
}
::-moz-selection{
  background:rgba(99,102,241,0.2);
  color:inherit
}

/* ===== Container ===== */
.container{max-width:var(--container);margin:0 auto;padding:0 var(--space-6)}
@media(max-width:768px){.container{padding:0 var(--space-4)}}

/* ===== Navigation ===== */
.navbar{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);display:flex;align-items:center;transition:background var(--slow),box-shadow var(--slow),border-color var(--slow);background:transparent;will-change:background,box-shadow}
.navbar.scrolled{background:rgba(255,255,255,0.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--gray-200);box-shadow:var(--shadow-sm)}

.nav-wrapper{display:flex;align-items:center;justify-content:space-between;width:100%}

.logo{display:flex;align-items:center;gap:var(--space-3);font-weight:700;font-size:var(--text-xl)}
.logo .brand-logo{height:auto;max-height:40px;width:auto;transition:filter var(--slow)}
/* 导航栏滚动后（白色背景），给logo添加白色背景使其可见 */
.navbar.scrolled .logo .brand-logo{filter:drop-shadow(0 2px 8px rgba(0,0,0,0.08));background:linear-gradient(135deg,var(--brand-50),var(--brand-100));padding:4px 8px;border-radius:12px}
.logo-text{background:linear-gradient(135deg,var(--brand-600),var(--brand-500));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

.nav-menu{display:none;align-items:center;gap:var(--space-2)}
@media(min-width:768px){.nav-menu{display:flex}}

.nav-link{padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:500;color:var(--gray-600);transition:all var(--fast)}
.navbar:not(.scrolled) .nav-link{color:rgba(255,255,255,0.8)}
.navbar:not(.scrolled) .nav-link:hover{color:#fff;background:rgba(255,255,255,0.12)}
.navbar.scrolled .nav-link:hover{color:var(--primary);background:var(--brand-50)}

.nav-toggle{display:flex;align-items:center;justify-content:center;padding:var(--space-2);width:40px;height:40px;border-radius:var(--radius-md);color:var(--gray-700);transition:background var(--fast)}
@media(min-width:768px){.nav-toggle{display:none}}
.nav-toggle:hover{background:rgba(255,255,255,0.1)}
.navbar.scrolled .nav-toggle:hover{background:var(--gray-100)}

/* Mobile menu */
.nav-menu{position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);flex-direction:column;padding:var(--space-8);gap:var(--space-2);transform:translateX(100%);opacity:0;visibility:hidden;transition:all var(--slow)}
.nav-menu.open{transform:translateX(0);opacity:1;visibility:visible}
.nav-menu.open .nav-link{color:var(--gray-700);font-size:var(--text-lg);padding:var(--space-4)}
.nav-menu.open .nav-link:hover{color:var(--primary);background:var(--brand-50)}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-6);font-size:var(--text-base);font-weight:600;border-radius:var(--radius-full);transition:all var(--base);white-space:nowrap;user-select:none;position:relative;overflow:hidden;will-change:transform}
.btn-sm{padding:var(--space-2) var(--space-4);font-size:var(--text-sm)}
.btn-lg{padding:var(--space-4) var(--space-8);font-size:var(--text-lg)}

.btn-primary{background:linear-gradient(135deg,var(--brand-600),var(--brand-500));color:#fff;box-shadow:0 4px 14px rgba(99,102,241,0.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(99,102,241,0.5)}

.btn-ghost{background:transparent;color:var(--gray-700);border:1.5px solid var(--gray-300)}
.btn-ghost:hover{background:var(--gray-50);border-color:var(--gray-400)}

.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--brand-200)}
.btn-outline:hover{background:var(--brand-50);border-color:var(--brand-300)}

.btn-white{background:#fff;color:var(--brand-700);box-shadow:var(--shadow-md)}
.btn-white:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}

.btn-outline-white{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,0.3)}
.btn-outline-white:hover{background:rgba(255,255,255,0.1);border-color:rgba(255,255,255,0.5)}

.btn-block{width:100%}

/* ===== Hero ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;background:linear-gradient(135deg,var(--gray-950) 0%,#0A0A1A 40%,var(--brand-900) 80%,#1E1B4B 100%)}

.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-gradient{position:absolute;inset:0;background:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(99,102,241,0.25),transparent),radial-gradient(ellipse 60% 40% at 80% 50%,rgba(236,72,153,0.12),transparent)}
.hero-mesh{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:64px 64px;mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black,transparent);-webkit-mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black,transparent)}

.hero .container{display:grid;grid-template-columns:1fr;gap:var(--space-16);align-items:center;position:relative;z-index:1}
@media(min-width:992px){.hero .container{grid-template-columns:1fr 1fr}}

.hero-content{padding:calc(var(--nav-h) + var(--space-16)) 0 var(--space-16)}

.hero-badge{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.15);border-radius:var(--radius-full);color:rgba(255,255,255,0.9);font-size:var(--text-sm);font-weight:500;margin-bottom:var(--space-8);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}

.hero-title{display:flex;flex-direction:column;font-size:clamp(1.5rem,4.5vw,3.5rem);font-weight:800;line-height:1.25;letter-spacing:-0.02em;color:#fff;margin-bottom:var(--space-6);max-width:100%}
.title-line{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:inherit;font-weight:inherit;letter-spacing:inherit;color:inherit;line-height:inherit}
@media(max-width:480px){.hero-title{font-size:clamp(1.3rem,7vw,1.8rem)}.title-line{white-space:normal;word-break:break-word;overflow:visible;text-overflow:unset}}
.title-line.highlight{background:linear-gradient(135deg,var(--warning),var(--brand-300),var(--warning));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;background-size:200% auto;animation:shimmer 4s ease infinite}
@keyframes shimmer{0%,100%{background-position:0 center}50%{background-position:100% center}}

.hero-subtitle{font-size:clamp(1rem,2vw,1.25rem);color:rgba(255,255,255,0.6);line-height:var(--leading-relaxed);margin-bottom:var(--space-8)}

.hero-actions{display:flex;gap:var(--space-4);flex-wrap:wrap;margin-bottom:var(--space-8)}

.hero-social-proof{display:flex;align-items:center;gap:var(--space-4);color:rgba(255,255,255,0.7);font-size:var(--text-sm)}
.hero-social-proof strong{color:#fff}
.avatar-group{display:flex;flex-wrap:wrap;align-items:center}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--brand-500);border:2px solid var(--gray-900);display:flex;align-items:center;justify-content:center;font-size:var(--text-sm);font-weight:600;color:#fff;margin-left:-10px;overflow:hidden;flex-shrink:0}
.avatar:first-child{margin-left:0}
.avatar img{width:100%;height:100%;object-fit:cover;border-radius:50%}

/* Hero visual */
.hero-visual{position:relative;display:none;justify-content:center;align-items:center}
@media(min-width:992px){.hero-visual{display:flex}}

.hero-card{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);border-radius:var(--radius-2xl);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);padding:var(--space-6);position:relative}
.hero-card-main{width:300px;animation:float-card 6s ease-in-out infinite}
.hero-card-secondary{position:absolute;bottom:-20px;right:-40px;width:200px;animation:float-card 6s ease-in-out infinite 1s}

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

.card-header{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-4)}
.card-info h4{font-size:var(--text-sm);font-weight:600;color:#fff;margin-bottom:2px}
.card-rating{display:flex;align-items:center;gap:2px;font-size:var(--text-xs);color:var(--warning)}
.rating-count{color:rgba(255,255,255,0.5);margin-left:2px}
.card-price{margin-left:auto;font-size:var(--text-lg);font-weight:700;color:#fff}

.card-image{height:220px;background:linear-gradient(135deg,var(--brand-600),var(--brand-800));border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;margin-bottom:var(--space-4)}

/* DJ Visualizer */
.dj-visualizer{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-4);width:100%}

.vinyl-disc{animation:spin 3s linear infinite}
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}

/* Equalizer bars */
.equalizer{display:flex;align-items:flex-end;gap:4px;height:40px;padding:0 var(--space-4)}
.eq-bar{width:6px;background:linear-gradient(180deg,var(--brand-300),var(--brand-500));border-radius:3px;animation:eq-bounce 0.8s ease-in-out infinite alternate;animation-delay:var(--delay, 0s)}
.eq-bar:nth-child(1){height:20px}
.eq-bar:nth-child(2){height:35px}
.eq-bar:nth-child(3){height:25px}
.eq-bar:nth-child(4){height:40px}
.eq-bar:nth-child(5){height:30px}
.eq-bar:nth-child(6){height:22px}
.eq-bar:nth-child(7){height:38px}
@keyframes eq-bounce{0%{transform:scaleY(0.3);opacity:0.5}100%{transform:scaleY(1);opacity:1}}

/* Brand logos */
.brand-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-2);padding:0 var(--space-3);width:100%;margin-top:var(--space-3)}
.brand-logo{font-size:0.6rem;font-weight:600;color:rgba(255,255,255,0.6);padding:3px 8px;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);border-radius:4px;letter-spacing:0.02em;white-space:nowrap}
.card-tags{display:flex;gap:var(--space-2);flex-wrap:wrap}
.tag{padding:var(--space-1) var(--space-3);background:rgba(255,255,255,0.1);border-radius:var(--radius-full);font-size:var(--text-xs);color:rgba(255,255,255,0.8)}

.mini-stat{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) 0}
.mini-icon{font-size:1.5rem}
.mini-label{display:block;font-size:var(--text-xs);color:rgba(255,255,255,0.5)}
.mini-value{display:block;font-size:var(--text-base);font-weight:700;color:#fff}

/* Hero divider */
.hero-divider{position:absolute;bottom:0;left:0;right:0;line-height:0}
.hero-divider svg{width:100%;height:60px;display:block}

/* ===== Social Proof Bar ===== */
.social-proof{padding:var(--space-12) 0;background:var(--gray-50);border-bottom:1px solid var(--gray-100)}
.proof-label{text-align:center;font-size:var(--text-sm);color:var(--gray-500);margin-bottom:var(--space-6);font-weight:500}
.proof-stats{display:flex;justify-content:center;align-items:center;gap:var(--space-10);flex-wrap:wrap}
.proof-item{text-align:center}
.proof-number{font-size:var(--text-3xl);font-weight:800;color:var(--gray-900);letter-spacing:-0.02em}
.proof-text{font-size:var(--text-sm);color:var(--gray-500);margin-top:var(--space-1)}
.proof-divider{width:1px;height:40px;background:var(--gray-200)}

/* ===== Sections ===== */
.section{padding:var(--space-24) 0;position:relative;overflow:hidden;background:#fff}
.section .container{position:relative;z-index:1}
.section-header{text-align:center;max-width:600px;margin:0 auto var(--space-16)}
.section-tag{display:inline-block;font-size:var(--text-xs);font-weight:600;letter-spacing:0.1em;text-transform:uppercase;color:var(--primary);background:var(--brand-50);padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);margin-bottom:var(--space-4)}
.section-title{font-size:clamp(1.75rem,3.5vw,2.5rem);font-weight:800;color:var(--gray-900);letter-spacing:-0.02em;line-height:var(--leading-tight);margin-bottom:var(--space-3)}
.section-desc{font-size:var(--text-lg);color:var(--gray-500);line-height:var(--leading-relaxed)}

/* ===== Services ===== */
.services-grid{display:grid;grid-template-columns:1fr;gap:var(--space-6)}
@media(min-width:768px){.services-grid{grid-template-columns:repeat(2,1fr)}}

.service-card{background:#fff;padding:var(--space-8);border-radius:var(--radius-2xl);border:1px solid var(--gray-200);transition:all var(--slow);position:relative;will-change:transform,box-shadow}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl);border-color:transparent}
.service-card.featured{border-color:var(--success);background:linear-gradient(180deg,#F0FDF4,#fff)}
.service-card.featured:hover{box-shadow:0 20px 40px rgba(16,185,129,0.15)}

.featured-badge{position:absolute;top:var(--space-6);right:var(--space-6);background:var(--success);color:#fff;font-size:var(--text-xs);font-weight:600;padding:var(--space-1) var(--space-3);border-radius:var(--radius-full)}

.service-badge{position:absolute;top:var(--space-4);right:var(--space-4);background:linear-gradient(135deg,#6366F1,#8B5CF6);-webkit-linear-gradient(135deg,#6366F1,#8B5CF6);color:#fff;font-size:11px;font-weight:600;padding:4px 12px;border-radius:var(--radius-full);z-index:10;box-shadow:0 2px 8px rgba(99,102,241,0.3);-webkit-box-shadow:0 2px 8px rgba(99,102,241,0.3);animation:pulse-badge 2s ease-in-out infinite;-webkit-animation:pulse-badge 2s ease-in-out infinite}

@keyframes pulse-badge{
  0%,100%{transform:scale(1)}
  50%{transform:scale(1.05)}
}

.service-icon{width:56px;height:56px;margin-bottom:var(--space-6)}
.service-card h3{font-size:var(--text-xl);font-weight:700;color:var(--gray-900);margin-bottom:var(--space-3)}
.service-card p{font-size:var(--text-base);color:var(--gray-600);margin-bottom:var(--space-6);line-height:var(--leading-relaxed)}

.feature-list{display:flex;flex-direction:column;gap:var(--space-2)}
.feature-list li{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-sm);color:var(--gray-700)}
.feature-list svg{color:var(--success);flex-shrink:0}

/* ===== How It Works ===== */
.steps-grid{display:flex;align-items:flex-start;gap:var(--space-4);flex-wrap:wrap;justify-content:center}

.step-card{text-align:left;flex:1 1 300px;min-width:300px;padding:var(--space-6) var(--space-5);background:#fff;border-radius:var(--radius-xl);border:1px solid var(--gray-200);position:relative;display:flex;align-items:center;gap:var(--space-4);will-change:transform}
.step-number{position:static;transform:none;width:32px;height:32px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:var(--text-sm);font-weight:700;flex-shrink:0}
.step-icon{margin-bottom:0;margin-right:0;flex-shrink:0}
.step-content{flex:1}
.step-card h3{font-size:var(--text-base);font-weight:700;color:var(--gray-900);margin-bottom:var(--space-1)}
.step-card p{font-size:var(--text-sm);color:var(--gray-500);line-height:var(--leading-relaxed);display:block !important}

.step-connector{display:none;align-items:center;padding-top:var(--space-8);position:relative}
@media(min-width:768px){.step-connector{display:flex}}
.step-connector svg{overflow:visible}
.step-connector path{
  stroke-dasharray:100;
  stroke-dashoffset:100;
  animation:arrow-flow 2s ease-in-out infinite
}
.step-connector path:nth-child(2){
  animation-delay:0.3s
}
@keyframes arrow-flow{
  0%{stroke-dashoffset:100;opacity:0.3}
  50%{stroke-dashoffset:0;opacity:1}
  100%{stroke-dashoffset:-100;opacity:0.3}
}

/* Mobile step cards - rectangular */
@media(max-width:767px){
  .steps-grid{flex-direction:column;align-items:stretch;gap:var(--space-4)}
  .step-card{width:100%;flex:1 1 auto;padding:var(--space-6) var(--space-5);display:flex;flex-direction:row;align-items:center;gap:var(--space-4);text-align:left}
  .step-number{position:static;transform:none;flex-shrink:0}
  .step-icon{margin-bottom:0;margin-right:0;flex-shrink:0}
  .step-card h3{font-size:var(--text-base);margin-bottom:0}
  .step-card p{display:block !important}
}

/* ===== Cities ===== */
.cities-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-4);margin-bottom:var(--space-10)}
@media(min-width:640px){.cities-grid{grid-template-columns:repeat(3,1fr);gap:var(--space-6)}}
@media(min-width:768px){.cities-grid{grid-template-columns:repeat(3,1fr);gap:var(--space-8)}}
@media(min-width:1200px){.cities-grid{grid-template-columns:repeat(3,1fr);gap:var(--space-8)}}

.city-card{background:#fff;padding:0;border-radius:var(--radius-xl);border:none;text-align:center;transition:all var(--slow);position:relative;overflow:hidden;height:200px;display:flex;flex-direction:column;justify-content:flex-end;will-change:transform}
.city-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background-image:var(--bg-image);background-size:cover;background-position:center;z-index:0;transition:transform 0.5s ease;-webkit-transition:-webkit-transform 0.5s ease}
.city-card:hover::before{transform:scale(1.08)}
.city-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.city-card.coming{}
.city-badge{position:absolute;top:var(--space-3);right:var(--space-3);font-size:0.55rem;font-weight:600;padding:2px 10px;border-radius:var(--radius-full);background:rgba(16,185,129,0.95);color:#fff;text-transform:uppercase;z-index:2;backdrop-filter:blur(4px)}
.city-badge.soon{background:rgba(245,158,11,0.95)}
.city-icon{display:none}
.city-card .city-content{position:relative;z-index:2;padding:var(--space-5) var(--space-4);background:linear-gradient(to top,rgba(0,0,0,0.75) 0%,rgba(0,0,0,0.3) 60%,transparent 100%);width:100%}
.city-card h3{font-size:var(--text-lg);font-weight:700;color:#fff;margin-bottom:var(--space-1);text-shadow:0 1px 3px rgba(0,0,0,0.5)}
.city-card p{font-size:var(--text-xs);color:rgba(255,255,255,0.85);line-height:1.6}
.city-status{display:inline-block;margin-top:2px;font-weight:600;color:#10B981}

.cities-cta{text-align:center}
.cities-cta p{color:var(--gray-500);margin-bottom:var(--space-6)}
.cities-cta .btn-outline{border-color:var(--brand-200);color:var(--primary)}
.cities-cta .btn-outline:hover{background:var(--brand-50);border-color:var(--brand-300)}

/* ===== DJ Join ===== */
.dj-join{background:var(--gray-50)}
.dj-join-content{display:grid;grid-template-columns:1fr;gap:var(--space-12);align-items:center}
@media(min-width:992px){.dj-join-content{grid-template-columns:1fr 1fr}}

.benefits-list{display:flex;flex-direction:column;gap:var(--space-5);margin-bottom:var(--space-8)}
.benefit-item{display:flex;gap:var(--space-4);align-items:flex-start}
.benefit-check{width:40px;height:40px;background:var(--brand-100);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;color:var(--primary);flex-shrink:0}
.benefit-item h4{font-size:var(--text-base);font-weight:700;color:var(--gray-900);margin-bottom:var(--space-1)}
.benefit-item p{font-size:var(--text-sm);color:var(--gray-500)}

.cta-note{margin-top:0;font-size:var(--text-sm);color:var(--gray-500)}
.cta-proof{display:flex;align-items:center;justify-content:center;gap:var(--space-3);margin-top:var(--space-4)}
.dj-avatars{display:flex;gap:-8px}
.dj-avatar{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:3px solid white;box-shadow:0 2px 8px rgba(0,0,0,0.15)}

/* Earnings card */
.dj-join-visual{display:none;justify-content:center}
@media(min-width:768px){.dj-join-visual{display:flex}}

.earnings-card{background:#fff;padding:var(--space-8);border-radius:var(--radius-2xl);box-shadow:var(--shadow-xl);border:1px solid var(--gray-100);width:100%;max-width:380px}
.earnings-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-2)}
.earnings-header h4{font-size:var(--text-sm);color:var(--gray-500)}
.earnings-badge{background:var(--success);color:#fff;font-size:var(--text-xs);font-weight:600;padding:var(--space-1) var(--space-2);border-radius:var(--radius-full)}
.earnings-amount{font-size:var(--text-3xl);font-weight:800;color:var(--gray-900);margin-bottom:var(--space-6)}

.earnings-chart{display:flex;align-items:flex-end;gap:var(--space-2);height:80px;margin-bottom:var(--space-6)}
.chart-bar{flex:1;background:var(--brand-100);border-radius:var(--radius-sm) var(--radius-sm) 0 0;min-height:20%}
.chart-bar.active{background:var(--primary)}

.earnings-stats{display:flex;justify-content:space-between;padding-top:var(--space-6);border-top:1px solid var(--gray-100)}
.stat{display:flex;flex-direction:column}
.stat-label{font-size:var(--text-sm);color:var(--gray-500)}
.stat-value{font-size:var(--text-lg);font-weight:700;color:var(--gray-900)}

/* ===== Testimonials ===== */
.testimonials-grid{display:grid;grid-template-columns:1fr;gap:var(--space-6)}
@media(min-width:768px){.testimonials-grid{grid-template-columns:repeat(3,1fr)}}

.testimonial-card{background:#fff;padding:var(--space-8);border-radius:var(--radius-2xl);border:1px solid var(--gray-200);transition:all var(--slow)}
.testimonial-card:hover{box-shadow:var(--shadow-lg);border-color:transparent}
.testimonial-rating{display:flex;gap:2px;margin-bottom:var(--space-4)}
.testimonial-text{font-size:var(--text-base);color:var(--gray-700);line-height:var(--leading-relaxed);margin-bottom:var(--space-6);font-style:italic}
.testimonial-author{display:flex;gap:var(--space-3);align-items:center}
.author-avatar{width:40px;height:40px;background:linear-gradient(135deg,var(--brand-500),var(--brand-600));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:var(--text-base);font-weight:600;color:#fff;flex-shrink:0}
.author-info strong{display:block;font-size:var(--text-sm);color:var(--gray-900)}
.author-info span{font-size:var(--text-xs);color:var(--gray-500)}

/* ===== Contact ===== */
.contact-wrapper{display:grid;grid-template-columns:1fr;gap:var(--space-12)}
@media(min-width:768px){.contact-wrapper{grid-template-columns:1fr 1fr}}

.info-items{display:flex;flex-direction:column;gap:var(--space-6)}
.info-item{display:flex;gap:var(--space-4);align-items:flex-start}
.info-icon{width:48px;height:48px;background:var(--brand-100);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;color:var(--primary);flex-shrink:0}
.info-item h4{font-size:var(--text-base);font-weight:600;color:var(--gray-900);margin-bottom:var(--space-1)}
.info-item p{font-size:var(--text-sm);color:var(--gray-600)}

.service-center{margin-top:var(--space-8);padding-top:var(--space-6);border-top:1px solid var(--gray-200)}
.service-title{font-size:var(--text-lg);font-weight:700;color:var(--gray-900);margin-bottom:var(--space-5)}
.qrcode-list{display:flex;gap:var(--space-6);flex-wrap:wrap}
.qrcode-item{display:flex;flex-direction:column;align-items:center;gap:var(--space-3)}
.qrcode-img{width:120px;height:120px;border-radius:var(--radius-lg);overflow:hidden;border:2px solid var(--gray-200);padding:var(--space-2);background:#fff}
.qrcode-img img{width:100%;height:100%;object-fit:contain}
.qrcode-info{display:flex;align-items:center;gap:var(--space-2);color:var(--gray-700);font-size:var(--text-sm);font-weight:500}

.contact-form-wrap{background:#fff;padding:var(--space-8);border-radius:var(--radius-2xl);box-shadow:var(--shadow-lg);border:1px solid var(--gray-100)}
.form-group{margin-bottom:var(--space-5)}
.form-label{display:block;font-size:var(--text-sm);font-weight:500;color:var(--gray-700);margin-bottom:var(--space-2)}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:var(--space-3) var(--space-4);font-size:var(--text-base);border:1.5px solid var(--gray-200);border-radius:var(--radius-lg);background:#fff;transition:all var(--fast);color:var(--gray-900)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,0.1)}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--gray-400)}
.form-group select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:var(--space-10)}

/* ===== CTA Section ===== */
.cta-section{background:linear-gradient(135deg,var(--brand-600) 0%,var(--brand-800) 100%)}
.cta-card{background:linear-gradient(135deg,var(--brand-700),var(--brand-900));border-radius:var(--radius-3xl);padding:var(--space-16) var(--space-8);text-align:center;position:relative;overflow:hidden}
.cta-card::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 30% 50%,rgba(255,255,255,0.08),transparent 70%)}
.cta-title{font-size:clamp(2rem,4vw,3rem);font-weight:800;color:#fff;margin-bottom:var(--space-4);letter-spacing:-0.02em;position:relative}
.cta-desc{font-size:var(--text-lg);color:rgba(255,255,255,0.7);margin-bottom:var(--space-8);position:relative}
.cta-actions{display:flex;gap:var(--space-4);justify-content:center;flex-wrap:wrap;position:relative}

/* ===== Footer ===== */
.footer{background:var(--gray-950);color:rgba(255,255,255,0.6);padding:var(--space-12) 0 var(--space-6)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:var(--space-8);padding-bottom:var(--space-8);border-bottom:1px solid rgba(255,255,255,0.08)}
@media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr 1fr;gap:var(--space-6)}}
@media(min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1fr;gap:var(--space-8)}}

.footer-logo{display:flex;align-items:center;gap:var(--space-3);font-size:var(--text-xl);font-weight:700;margin-bottom:var(--space-3)}
.footer-logo .brand-logo{height:auto;max-height:36px;width:auto}
.footer-brand p{font-size:var(--text-xs);margin-bottom:var(--space-1);line-height:1.5}
.footer-brand .mission{color:var(--warning);font-weight:600;font-size:var(--text-xs)}

.footer-links h4{font-size:var(--text-xs);font-weight:600;color:rgba(255,255,255,0.9);margin-bottom:var(--space-3);text-transform:uppercase;letter-spacing:0.05em}
.footer-links ul{display:flex;flex-direction:column;gap:var(--space-2)}
.footer-links a{font-size:var(--text-xs);color:rgba(255,255,255,0.5);transition:color var(--fast);padding:2px 0;display:inline-block}
.footer-links a:hover{color:#fff}

.footer-bottom{display:flex;flex-direction:column;gap:var(--space-4);align-items:center;padding-top:var(--space-6);text-align:center}
@media(min-width:768px){.footer-bottom{flex-direction:row;justify-content:space-between;text-align:left}}
.copyright p{font-size:var(--text-xs);color:rgba(255,255,255,0.4);margin-bottom:var(--space-1);line-height:1.5}
.footer-bottom-links{display:flex;gap:var(--space-5);flex-wrap:wrap;justify-content:center}
.footer-bottom-links a{font-size:var(--text-xs);color:rgba(255,255,255,0.4);transition:color var(--fast)}
.footer-bottom-links a:hover{color:#fff}

/* Mobile Footer Optimization */
@media(max-width:639px){
  .footer{padding:var(--space-10) 0 var(--space-5)}
  .footer-grid{gap:var(--space-7)}
  .footer-brand{text-align:center;padding-bottom:var(--space-3);border-bottom:1px solid rgba(255,255,255,0.06);margin-bottom:var(--space-5)}
  .footer-brand p{display:block;font-size:12px;color:rgba(255,255,255,0.5);line-height:1.6;margin-bottom:var(--space-1)}
  .footer-brand .mission{display:block;font-size:13px;margin-top:var(--space-2);letter-spacing:0.02em}
  .footer-links{background:rgba(255,255,255,0.02);border-radius:var(--radius-lg);padding:var(--space-4) var(--space-5);text-align:center}
  .footer-links h4{font-size:11px;color:var(--brand-400);margin-bottom:var(--space-2);letter-spacing:0.08em}
  .footer-links ul{flex-direction:row;flex-wrap:wrap;gap:0 var(--space-4);row-gap:var(--space-2);justify-content:center}
  .footer-links a{font-size:12px;padding:4px 0;border-bottom:1px solid transparent}
  .footer-links a:hover{border-bottom-color:var(--brand-400)}
  .footer-bottom{padding-top:var(--space-5);gap:var(--space-3);border-top:1px solid rgba(255,255,255,0.04);text-align:center}
  .copyright p{font-size:10px;line-height:1.6}
  .copyright{text-align:center}
  .footer-bottom-links{gap:var(--space-4);justify-content:center}
  .footer-bottom-links a{font-size:10px;padding:2px var(--space-2);background:rgba(255,255,255,0.04);border-radius:var(--radius-sm)}
}

/* ===== Back to Top ===== */
.back-to-top{position:fixed;bottom:var(--space-8);right:var(--space-8);width:48px;height:48px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(16px);transition:all var(--base);z-index:50;will-change:transform,opacity}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--primary-hover);transform:translateY(-4px)}
.back-to-top svg{width:20px;height:20px}

/* ===== Animations ===== */
.fade-in{opacity:0;transform:translateY(24px);-webkit-transform:translateY(24px);transition:opacity 0.6s ease,transform 0.6s ease;-webkit-transition:opacity 0.6s ease,-webkit-transform 0.6s ease;will-change:transform,opacity}
.fade-in.visible{opacity:1;transform:translateY(0);-webkit-transform:translateY(0)}
.fade-in-delay-1{transition-delay:0.1s}
.fade-in-delay-2{transition-delay:0.15s}
.fade-in-delay-3{transition-delay:0.2s}
.fade-in-delay-4{transition-delay:0.25s}

/* ===== Particle Canvas ===== */
.particles-canvas{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:0.6}

/* ===== Hero Glow (Mouse Follow) ===== */
.hero-glow{position:absolute;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,0.15),transparent 70%);pointer-events:none;z-index:0;transform:translate(-50%,-50%);transition:left 0.3s ease,top 0.3s ease}

/* ===== Floating Shapes ===== */
.floating-shapes{position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.shape{position:absolute;border-radius:50%;opacity:0.06;animation:float-shape 20s ease-in-out infinite}
.shape-1{width:300px;height:300px;background:linear-gradient(135deg,#6366F1,#EC4899);top:-10%;left:-5%;animation-delay:0s;animation-duration:25s}
.shape-2{width:200px;height:200px;background:linear-gradient(135deg,#8B5CF6,#6366F1);top:20%;right:-8%;animation-delay:-5s;animation-duration:20s}
.shape-3{width:150px;height:150px;background:linear-gradient(135deg,#EC4899,#F59E0B);bottom:10%;left:15%;animation-delay:-10s;animation-duration:22s}
.shape-4{width:250px;height:250px;background:linear-gradient(135deg,#6366F1,#10B981);bottom:-5%;right:20%;animation-delay:-7s;animation-duration:18s}
.shape-5{width:180px;height:180px;background:linear-gradient(135deg,#10B981,#6366F1);top:50%;left:40%;animation-delay:-3s;animation-duration:23s}
@keyframes float-shape{0%,100%{transform:translateY(0) rotate(0deg) scale(1)}25%{transform:translateY(-30px) rotate(5deg) scale(1.05)}50%{transform:translateY(-15px) rotate(-3deg) scale(0.95)}75%{transform:translateY(-40px) rotate(8deg) scale(1.02)}}

/* ===== Page Load Animation ===== */
.page-loading .hero-content{opacity:0;transform:translateY(30px)}
.page-loaded .hero-content{animation:hero-enter 1s ease forwards}
@keyframes hero-enter{0%{opacity:0;transform:translateY(30px)}100%{opacity:1;transform:translateY(0)}}

.page-loaded .hero-badge{animation:badge-enter 0.8s ease 0.2s forwards;opacity:0}
@keyframes badge-enter{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

.page-loaded .hero-subtitle{animation:subtitle-enter 0.8s ease 0.4s forwards;opacity:0}
@keyframes subtitle-enter{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}

.page-loaded .hero-actions{animation:actions-enter 0.8s ease 0.6s forwards;opacity:0}
@keyframes actions-enter{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}

.page-loaded .hero-social-proof{animation:proof-enter 0.8s ease 0.8s forwards;opacity:0}
@keyframes proof-enter{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}

.page-loaded .hero-card{animation:card-enter 0.8s ease 0.5s forwards;opacity:0}
@keyframes card-enter{from{opacity:0;transform:translateY(20px) scale(0.95)}to{opacity:1;transform:translateY(0) scale(1)}}

.page-loaded .hero-card-secondary{animation:card-secondary-enter 0.8s ease 0.7s forwards;opacity:0}
@keyframes card-secondary-enter{from{opacity:0;transform:translateY(30px) scale(0.9)}to{opacity:1;transform:translateY(0) scale(1)}}

/* ===== Gradient Flow ===== */
.gradient-flow{background-size:200% 200%;animation:gradient-flow 8s ease infinite}
@keyframes gradient-flow{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}

/* ===== Pulse Button ===== */
.btn-primary{position:relative}
.btn-primary::after{content:'';position:absolute;inset:-4px;border-radius:inherit;border:2px solid var(--brand-500);opacity:0;animation:pulse-ring 3s ease infinite}
@keyframes pulse-ring{0%{opacity:0;transform:scale(1)}50%{opacity:0.5}100%{opacity:0;transform:scale(1.15)}}

/* ===== Card 3D Tilt ===== */
.service-card{transform-style:preserve-3d;perspective:1000px}
.service-card .service-icon{transition:transform 0.3s ease}
.service-card:hover .service-icon{transform:translateZ(20px) scale(1.1)}
.service-card:hover h3{transform:translateZ(10px)}
.service-card h3{transition:transform 0.3s ease}

/* ===== Wave Animation ===== */
.wave-container{position:absolute;bottom:0;left:0;right:0;overflow:hidden;line-height:0}
.wave-container svg{width:200%;animation:wave-move 10s linear infinite}
@keyframes wave-move{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* ===== Star Twinkle ===== */
.stars{position:absolute;inset:0;z-index:0;pointer-events:none}
.star{position:absolute;width:2px;height:2px;background:white;border-radius:50%;animation:twinkle 3s ease-in-out infinite}
@keyframes twinkle{0%,100%{opacity:0.2;transform:scale(1)}50%{opacity:1;transform:scale(1.5)}}

/* ===== Scroll Progress ===== */
.scroll-progress{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,var(--brand-500),var(--brand-400),var(--warning));z-index:1000;transition:width 0.1s linear;width:0}

/* ===== Number Counter ===== */
.proof-number{font-variant-numeric:tabular-nums}

/* ===== Section Reveal ===== */
.section-reveal{opacity:0;transform:translateY(40px);transition:all 0.8s cubic-bezier(0.16,1,0.3,1)}
.section-reveal.revealed{opacity:1;transform:translateY(0)}
.section-reveal .section-header{transition-delay:0s}
.section-reveal .services-grid .service-card:nth-child(1){transition-delay:0.1s}
.section-reveal .services-grid .service-card:nth-child(2){transition-delay:0.2s}
.section-reveal .services-grid .service-card:nth-child(3){transition-delay:0.3s}
.section-reveal .services-grid .service-card:nth-child(4){transition-delay:0.4s}

/* ===== Magnetic Button ===== */
.magnetic-btn{transition:transform 0.3s cubic-bezier(0.34,1.56,0.64,1)}

/* ===== Tilt Card ===== */
.tilt-card{transition:transform 0.3s ease}

/* ===== Ripple Effect ===== */
.ripple{position:relative;overflow:hidden}
.ripple::before{content:'';position:absolute;top:50%;left:50%;width:0;height:0;background:rgba(255,255,255,0.3);border-radius:50%;transform:translate(-50%,-50%);transition:width 0.6s,height 0.6s}
.ripple:active::before{width:300px;height:300px}

/* ===== Glow Effect ===== */
.glow-on-hover{transition:box-shadow 0.3s ease}
.glow-on-hover:hover{box-shadow:0 0 30px rgba(99,102,241,0.4)}

/* ===== Text Reveal ===== */
.text-reveal{overflow:hidden}
.text-reveal span{display:inline-block;animation:text-slide-up 0.6s ease forwards;transform:translateY(100%)}
@keyframes text-slide-up{from{transform:translateY(100%)}to{transform:translateY(0)}}

/* ===== Bounce In ===== */
.bounce-in{animation:bounce-in 0.8s cubic-bezier(0.34,1.56,0.64,1) forwards}
@keyframes bounce-in{from{opacity:0;transform:scale(0.8)}to{opacity:1;transform:scale(1)}}

/* ===== Slide In Left ===== */
.slide-in-left{animation:slide-in-left 0.8s ease forwards}
@keyframes slide-in-left{from{opacity:0;transform:translateX(-50px)}to{opacity:1;transform:translateX(0)}}

/* ===== Slide In Right ===== */
.slide-in-right{animation:slide-in-right 0.8s ease forwards}
@keyframes slide-in-right{from{opacity:0;transform:translateX(50px)}to{opacity:1;transform:translateX(0)}}

/* ===== Parallax ===== */
.parallax{transition:transform 0.1s linear}

/* ===== Responsive ===== */
@media(max-width:767px){
    .section{padding:var(--space-16) 0}
    .proof-stats{flex-direction:column;gap:var(--space-6)}
    .proof-divider{width:40px;height:1px}
    .steps-grid{flex-direction:column;align-items:center}
    .step-connector{display:none !important}
    .cities-grid{grid-template-columns:repeat(3,1fr);gap:var(--space-4)}
    .cta-card{padding:var(--space-10) var(--space-6)}
}
@media(min-width:768px) and (max-width:1023px){
    .cities-grid{grid-template-columns:repeat(3,1fr);gap:var(--space-6)}
}
@media(min-width:1024px) and (max-width:1199px){
    .cities-grid{grid-template-columns:repeat(3,1fr);gap:var(--space-6)}
}

/* ===== Flow Lines Canvas ===== */
.flow-lines-canvas{
    position:absolute;
    top:0;
    left:0;
    width:100%;
    min-height:100%;
    pointer-events:none;
    z-index:0;
    opacity:0.6;
    display:block;
}
.section{position:relative;overflow:hidden}
.section .container{position:relative;z-index:1}

/* ===== Running Line Animation ===== */
.running-line-container{
    position:fixed;left:24px;top:0;bottom:0;z-index:90;
    width:40px;pointer-events:none;display:none;
}
@media(min-width:1200px){
    .running-line-container{display:block;}
}

.running-line{
    position:absolute;left:18px;top:0;bottom:0;
    width:2px;background:rgba(99,102,241,0.08);
    border-radius:1px;
}
.running-line::after{
    content:'';position:absolute;left:0;bottom:0;
    width:2px;height:0%;
    background:linear-gradient(180deg,var(--brand-500),var(--brand-300));
    border-radius:1px;
    transition:height 0.3s ease;
}
.running-line.animated::after{
    height:var(--scroll-progress, 0%);
}

.line-node{
    position:absolute;left:50%;transform:translateX(-50%);
    width:20px;height:20px;
    opacity:0.3;transition:all 0.5s ease;z-index:2;
}
.line-node.active{
    opacity:1;transform:translateX(-50%) scale(1.2);
}
.line-node svg{
    filter:drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

/* ===== Print ===== */
@media print{
  .navbar,.back-to-top,.hero-mesh,.running-line-container{display:none !important}
  .hero{min-height:auto;background:none;padding:2rem 0}
  .section{padding:2rem 0}
  body{color:#000;background:#fff}
  a{text-decoration:underline}
  .btn{border:1px solid currentColor;padding:8px 16px;background:none;color:#000}
}

/* ===== Accessibility & 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
  }
  .particlesCanvas,.flow-lines-canvas,.running-line-container{display:none !important}
}

/* High contrast mode support */
@media (prefers-contrast: high){
  :root{
    --brand-500:#5B21B6;
    --brand-600:#4C1D95;
    --gray-800:#1a1a1a;
    --gray-900:#000
  }
  .city-card::before{filter:contrast(1.2)}
  .btn-primary{background:var(--brand-700)}
}

/* Forced colors mode (Windows High Contrast) */
@media (forced-colors: active){
  .btn{border:2px solid currentColor}
  .avatar{border:2px solid currentColor}
  .nav-toggle:focus-visible{outline:3px solid currentColor}
}

/* Dark mode preparation (future) */
@media (prefers-color-scheme: dark){
  :root.color-scheme-auto{
    --gray-50:#1a1a2e;
    --gray-100:#16213e;
    --gray-200:#1f3460;
    --gray-300:#1a1a40;
    --gray-400:#4a4a6a;
    --gray-500:#6b6b8b;
    --gray-600:#8888aa;
    --gray-700:#aaaacc;
    --gray-800:#ccccee;
    --gray-900:#eeeef0;
    --gray-950:#fff
  }
}

/* ===== Performance Optimizations ===== */

/* CSS Containment for better rendering */
.hero,.services,.cities,.dj-join,.testimonials,.contact,.cta-section,.footer{
  contain:layout style paint;
  content-visibility:auto;
  contain-intrinsic-size:auto 500px
}

/* GPU acceleration for animated elements */
.navbar,.hero-card,.city-card,.btn,.avatar,.qrcode-img{
  will-change:transform;
  backface-visibility:hidden;
  -webkit-backface-visibility:hidden;
  transform:translateZ(0);
  -webkit-transform:translateZ(0)
}

/* Image optimization */
img{
  image-rendering:-webkit-optimize-contrast;
  image-rendering:crisp-edges
}

/* Lazy load placeholder */
[loading="lazy"]{
  opacity:0;
  transition:opacity 0.3s ease
}
[loading="lazy"].loaded{
  opacity:1
}

/* Font loading states */
.font-loading body{font-family:system-ui,-apple-system,sans-serif}
.font-loaded body{font-family:var(--font-sans)}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse){
  .navbar.scrolled{background:rgba(255,255,255,0.98);backdrop-filter:none;-webkit-backdrop-filter:none}
  .nav-menu{backdrop-filter:none;-webkit-backdrop-filter:none}
  .hero-badge,.card-hero{backdrop-filter:none;-webkit-backdrop-filter:none}
  
  /* Larger touch targets for mobile */
  .btn{min-height:44px;min-width:44px}
  .nav-link{padding:12px 16px;min-height:44px}
  .nav-toggle{width:48px;height:48px}
  
  /* Remove hover effects on touch devices */
  .city-card:hover::before{transform:none}
  .btn:hover{transform:none}
}

/* Small screen optimizations */
@media (max-width: 480px){
  html{font-size:14px}
  .container{padding-left:16px;padding-right:16px}
  .section{padding:60px 0}
}

/* Large screen optimizations */
@media (min-width: 1920px){
  :root{--container:1400px}
  .container{padding-left:40px;padding-right:40px}
}

/* Ultra-wide screen support */
@media (min-width: 2560px){
  :root{--container:1600px}
  body{font-size:18px}
}

/* Landscape orientation on mobile */
@media (max-height: 500px) and (orientation: landscape){
  .hero{min-height:100vh;padding-top:60px;padding-bottom:20px}
  .hero-content{padding-top:20px}
  .hero-title{font-size:clamp(1.2rem,5vw,2rem)}
  .hero-actions{margin-bottom:20px}
  .hero-social-proof{display:none}
  .navbar{height:56px}
}

/* Cross-browser scrollbar styling */
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--gray-100);border-radius:4px}
::-webkit-scrollbar-thumb{background:var(--gray-400);border-radius:4px;border:2px solid var(--gray-100)}
::-webkit-scrollbar-thumb:hover{background:var(--gray-500)}

/* Firefox scrollbar */
*{scrollbar-width:thin;scrollbar-color:var(--gray-400) var(--gray-100)}

/* IE/Edge legacy scrollbar */
body{-ms-overflow-style:scrollbar}

/* No-JS fallback styles */
.no-js .particlesCanvas,
.no-js .flow-lines-canvas,
.no-js .running-line-container,
.no-js .hero-mesh{display:none !important}
.no-js .hero-bg{opacity:1}
.no-js .city-card::before{animation:none !important}

/* Container Queries Fallback */
@supports not (container-type: inline-size){
  .responsive-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
    gap:var(--space-6)
  }
}

/* Smooth scrolling polyfill for older browsers */
@supports not (scroll-behavior: smooth){
  html{scroll-behavior:auto}
}

/* ===== Performance & Accessibility Enhancements ===== */

/* Reduced motion preference */
@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
  }
  
  .particles-canvas,
  .hero-glow,
  .floating-shapes{
    display:none
  }
}

/* High contrast mode support */
@media(prefers-contrast:high){
  :root{
    --gray-500:#525252;
    --gray-600:#404040;
    --gray-700:#262626
  }
  
  .btn-primary{
    border:2px solid currentColor
  }
}

/* Print styles */
@media print{
  .navbar,.back-to-top,.particles-canvas,.hero-glow,.floating-shapes,.running-line-container{display:none!important}
  
  body{
    color:#000;background:#fff}
    
  a{text-decoration:underline}
  
  .service-card,.city-card,.testimonial-card{
    break-inside:avoid;
    page-break-inside:avoid;
    border:1px solid #ccc
  }
}

/* Focus visible for better keyboard navigation */
:focus-visible{
  outline:2px solid var(--brand-500);
  outline-offset:2px
}

/* Image optimization */
img{
  image-rendering:-webkit-optimize-contrast;
  image-rendering:crisp-edges
}

/* Text rendering optimization */
body{
  text-rendering:optimizeLegibility;
  -webkit-font-feature-settings:"kern"1;
  font-feature-settings:"kern"1
}

/* Content visibility for off-screen content */
.section:not(.visible){
  content-visibility:auto;
  contain-intrinsic-size:auto 500px
}