:root{--color-bg: #0a0a0a;--color-bg-soft: #141414;--color-bg-card: #1a1a1a;--color-bg-elevated: #222222;--color-border: #2a2a2a;--color-border-soft: #333333;--color-orange: #ff6a00;--color-orange-bright: #ff8a3d;--color-orange-soft: #cc5500;--color-orange-dim: #4a2200;--color-text: #f5f5f5;--color-text-soft: #b0b0b0;--color-text-dim: #707070;--color-white: #ffffff;--color-success: #4ade80;--color-warning: #facc15;--color-error: #f87171;--font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Heiti SC", "Noto Sans CJK SC", sans-serif;--space-1: 8px;--space-2: 16px;--space-3: 24px;--space-4: 32px;--space-5: 48px;--space-6: 64px;--space-7: 80px;--space-8: 96px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 16px;--radius-xl: 24px;--shadow-card: 0 4px 24px rgba(0, 0, 0, .4);--shadow-orange: 0 0 24px rgba(255, 106, 0, .15);--transition: .25s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text);line-height:1.5;font-weight:400;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}img{max-width:100%;display:block}ul,ol{list-style:none}h1,h2,h3,h4,h5,h6{font-weight:800;line-height:1.2;letter-spacing:-.01em}::selection{background:var(--color-orange);color:var(--color-bg)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-bg)}::-webkit-scrollbar-thumb{background:var(--color-border-soft);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-orange-soft)}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--space-2)}@media (min-width: 768px){.container{padding:0 var(--space-3)}}.section{padding:var(--space-7) 0}@media (max-width: 767px){.section{padding:var(--space-6) 0}}.section-title{font-size:clamp(28px,5vw,42px);font-weight:900;margin-bottom:var(--space-2);letter-spacing:-.02em}.section-subtitle{font-size:16px;color:var(--color-text-soft);margin-bottom:var(--space-5);max-width:600px}.section-header{margin-bottom:var(--space-5)}.section-header .accent{color:var(--color-orange)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-1);padding:12px 28px;font-size:15px;font-weight:700;border-radius:var(--radius-md);transition:all var(--transition);white-space:nowrap}.btn-primary{background:var(--color-orange);color:var(--color-bg)}.btn-primary:hover{background:var(--color-orange-bright);transform:translateY(-2px);box-shadow:var(--shadow-orange)}.btn-outline{border:1.5px solid var(--color-border-soft);color:var(--color-text)}.btn-outline:hover{border-color:var(--color-orange);color:var(--color-orange)}.btn-ghost{color:var(--color-text-soft)}.btn-ghost:hover{color:var(--color-orange)}.fade-in{animation:fadeIn .6s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulseGlow{0%,to{box-shadow:0 0 #ff6a0066}50%{box-shadow:0 0 0 12px #ff6a0000}}.text-orange{color:var(--color-orange)}.text-dim{color:var(--color-text-dim)}.text-soft{color:var(--color-text-soft)}