:root{--brand-primary:#F04424;--brand-primary-light:#FF765D;--brand-primary-dark:#C7361D;--brand-primary-50:#fef2f0;--brand-primary-100:#fde3df;--brand-primary-200:#fbc9c0;--brand-primary-300:#f9a594;--brand-primary-400:#f77a62;--brand-primary-500:#F04424;--brand-primary-600:#dc3a1d;--brand-primary-700:#C7361D;--brand-primary-800:#a82e18;--brand-primary-900:#872513;--accent-electric-blue:#3b82f6;--accent-cyan:#06b6d4;--accent-blue-violet:#6366f1;--accent-purple:#8b5cf6;--accent-glow-blue:rgba(59,130,246,0.15);--accent-glow-cyan:rgba(6,182,212,0.12);--accent-glow-violet:rgba(99,102,241,0.15);--surface-darkest:#090A0D;--surface-dark:#10131A;--surface-card-dark:#151923;--surface-card-dark-hover:#1a1f2e;--surface-elevated:#1e2433;--surface-light:#F5F6F8;--surface-white:#FFFFFF;--surface-muted:#f3f4f6;--surface-overlay:rgba(9,10,13,0.72);--semantic-success:#10b981;--semantic-success-bg:rgba(16,185,129,0.1);--semantic-warning:#f59e0b;--semantic-warning-bg:rgba(245,158,11,0.1);--semantic-danger:#ef4444;--semantic-danger-bg:rgba(239,68,68,0.1);--semantic-info:#3b82f6;--semantic-info-bg:rgba(59,130,246,0.1);--text-primary:#111827;--text-secondary:#4b5563;--text-tertiary:#9ca3af;--text-quaternary:#d1d5db;--text-inverse:#ffffff;--text-inverse-secondary:rgba(255,255,255,0.72);--text-inverse-tertiary:rgba(255,255,255,0.5);--border-light:#e5e7eb;--border-default:#d1d5db;--border-dark:#374151;--border-subtle:rgba(255,255,255,0.08);--border-focus:var(--brand-primary);--font-sans:"Inter","PingFang SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;--font-mono:"JetBrains Mono","Fira Code",ui-monospace,monospace;--font-display:"Inter","PingFang SC","Noto Sans CJK SC",sans-serif;--text-xs:0.6875rem;--text-sm:0.8125rem;--text-base:0.9375rem;--text-lg:1.0625rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:1.875rem;--text-4xl:2.25rem;--text-5xl:3rem;--weight-normal:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--weight-black:900;--leading-tight:1.2;--leading-snug:1.375;--leading-normal:1.5;--leading-relaxed:1.625;--tracking-tight:-0.02em;--tracking-normal:0;--tracking-wide:0.025em;--tracking-wider:0.05em;--tracking-widest:0.1em;--space-0:0;--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-sm:0.375rem;--radius-md:0.5rem;--radius-lg:0.75rem;--radius-xl:1rem;--radius-2xl:1.25rem;--radius-full:9999px;--shadow-xs:0 1px 2px rgba(0,0,0,0.04);--shadow-sm:0 2px 8px rgba(16,24,40,0.06);--shadow-md:0 4px 16px rgba(16,24,40,0.08);--shadow-lg:0 8px 32px rgba(16,24,40,0.1);--shadow-xl:0 16px 48px rgba(16,24,40,0.12);--shadow-glow-brand:0 0 24px rgba(240,68,36,0.25);--shadow-glow-tech:0 0 32px rgba(59,130,246,0.15);--shadow-dark-card:0 4px 20px rgba(0,0,0,0.4);--border-width-thin:1px;--border-width-default:1px;--border-width-thick:2px;--container-max:1280px;--container-padding:1rem;--grid-columns:12;--grid-gap:1rem;--motion-fast:150ms cubic-bezier(0.4,0,0.2,1);--motion-normal:250ms cubic-bezier(0.4,0,0.2,1);--motion-slow:400ms cubic-bezier(0.4,0,0.2,1);--motion-spring:350ms cubic-bezier(0.34,1.56,0.64,1);--z-base:0;--z-dropdown:100;--z-sticky:500;--z-header:50;--z-overlay:1000;--z-modal:1100;--z-toast:1200;--logo-mark:url(/images/brand/stellar-alliance-logo-mark.svg);--logo-horizontal:url(/images/brand/stellar-alliance-logo-horizontal.svg);--logo-horizontal-dark:url(/images/brand/stellar-alliance-logo-horizontal-dark.svg);--logo-horizontal-light:url(/images/brand/stellar-alliance-logo-horizontal-light.svg);--logo-mono-white:url(/images/brand/stellar-alliance-logo-mono-white.svg);--logo-mono-black:url(/images/brand/stellar-alliance-logo-mono-black.svg);--favicon:url(/images/brand/stellar-alliance-favicon.svg);--app-icon:url(/images/brand/stellar-alliance-app-icon.svg);--gradient-brand:linear-gradient(135deg,#FF765D,#F04424);--gradient-brand-subtle:linear-gradient(135deg,rgba(255,118,93,0.08),rgba(240,68,36,0.08));--gradient-dark:linear-gradient(180deg,#090A0D,#10131A);--gradient-dark-mesh:radial-gradient(ellipse at 20% 0%,rgba(59,130,246,0.12),transparent 50%),radial-gradient(ellipse at 80% 100%,rgba(99,102,241,0.1),transparent 50%),linear-gradient(180deg,#090A0D,#10131A);--gradient-tech:linear-gradient(135deg,#3b82f6,#6366f1 50%,#06b6d4);--gradient-tech-subtle:linear-gradient(135deg,rgba(59,130,246,0.06),rgba(6,182,212,0.06));--gradient-hero-dark:linear-gradient(135deg,#090A0D,#0f172a 50%,#10131A);--gradient-glow-cyan:radial-gradient(circle,rgba(6,182,212,0.15) 0%,transparent 70%);--gradient-glow-violet:radial-gradient(circle,rgba(99,102,241,0.12) 0%,transparent 70%);--brand-name-cn:"星际联盟";--brand-name-en:"STELLAR ALLIANCE";--brand-slogan:"品类更全，价格更真";--platform-facebook:linear-gradient(135deg,#1554c0,#207ee9,#58b6ee);--platform-facebook-glow:rgba(32,126,233,0.2);--platform-telegram:linear-gradient(135deg,#0879a9,#2aabee,#70d2f6);--platform-telegram-glow:rgba(42,171,238,0.2);--platform-whatsapp:linear-gradient(135deg,#075e16,#25d366,#75e69a);--platform-whatsapp-glow:rgba(37,211,102,0.2);--platform-tiktok:linear-gradient(135deg,#080808,#252525,#4b4b4b);--platform-tiktok-accent:linear-gradient(135deg,#00f2ea,#ff0050);--platform-instagram:linear-gradient(135deg,#7b1fb7,#c52f8c,#f08a38);--platform-instagram-glow:rgba(197,47,140,0.2);--platform-x:linear-gradient(135deg,#000000,#1a1a1a,#333333);--platform-x-glow:rgba(255,255,255,0.06);--platform-chatgpt:linear-gradient(135deg,#07584b,#0f8f79,#58c5ad);--platform-chatgpt-glow:rgba(15,143,121,0.2);--platform-claude:linear-gradient(135deg,#723d2d,#b46549,#df987b);--platform-claude-glow:rgba(180,101,73,0.2);--platform-gemini:linear-gradient(135deg,#314baf,#5f65dd,#bd62d1);--platform-gemini-glow:rgba(95,101,221,0.2);--platform-netflix:linear-gradient(135deg,#6f0710,#c31320,#ef5861);--platform-netflix-glow:rgba(195,19,32,0.2);--platform-spotify:linear-gradient(135deg,#08753b,#12a85a,#62d88f);--platform-spotify-glow:rgba(18,168,90,0.2);--platform-youtube:linear-gradient(135deg,#720a0a,#c4302b,#ff5252);--platform-discord:linear-gradient(135deg,#343f99,#5865f2,#929af6);--platform-microsoft:linear-gradient(135deg,#07558c,#168bd0,#60bdea);--platform-canva:linear-gradient(135deg,#166b8c,#7b3fc8,#e24c9a);--platform-steam:linear-gradient(135deg,#0a0a0a,#1b2838,#2a475e);--platform-steam-glow:rgba(42,71,94,0.3);--platform-apple:linear-gradient(135deg,#7c2c84,#bd476f,#ed8753);--platform-default:linear-gradient(135deg,#70521c,#a77729,#d6a853);--button-height:2.25rem;--button-height-sm:1.75rem;--button-height-lg:2.75rem;--button-radius:var(--radius-md);--button-bg-primary:var(--brand-primary);--button-bg-primary-hover:var(--brand-primary-dark);--button-bg-dark:var(--surface-dark);--button-bg-dark-hover:var(--surface-card-dark);--button-text-primary:#ffffff;--button-transition:var(--motion-fast);--card-radius:var(--radius-lg);--card-border:1px solid var(--border-light);--card-shadow:var(--shadow-sm);--card-shadow-hover:var(--shadow-lg);--card-padding:var(--space-4);--badge-radius:var(--radius-full);--badge-height:1.25rem;--badge-font-size:var(--text-xs);--input-height:2.25rem;--input-radius:var(--radius-md);--input-border:1px solid var(--border-light);--input-border-focus:2px solid var(--brand-primary);--tab-border-active:2px solid var(--brand-primary);--tab-border-inactive:2px solid transparent;--skeleton-bg:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 50%,#f0f0f0 75%);--skeleton-animation:shimmer 1.5s infinite}@keyframes section-reveal{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes glow-pulse{0%,to{opacity:.5}50%{opacity:1}}.ds-dark-section{background:var(--gradient-dark-mesh);color:var(--text-inverse)}.ds-tech-glow{position:relative}.ds-tech-glow:before{content:"";position:absolute;inset:0;background:var(--gradient-glow-cyan);pointer-events:none;z-index:0}.ds-text-hierarchy h2{font-size:var(--text-2xl);font-weight:var(--weight-black);letter-spacing:var(--tracking-tight)}.ds-text-hierarchy h3{font-size:var(--text-lg);font-weight:var(--weight-bold)}.ds-divider{height:1px;background:linear-gradient(90deg,transparent,var(--border-light),transparent)}.ds-full-bleed-dark{width:100vw;margin-left:calc(50% - 50vw);background:var(--surface-darkest);color:var(--text-inverse)}.ds-mesh-gradient{background:var(--gradient-dark-mesh)}.ds-reveal{animation:section-reveal var(--motion-slow) ease-out}.ds-skeleton{background:var(--skeleton-bg);background-size:200% 100%;animation:var(--skeleton-animation)}