:root{--yc-bg:#0a0e1a;--yc-bg-2:#0d1526;--yc-bg-3:#0f1a2e;--yc-accent-1:#22d3ee;--yc-accent-2:#fbbf24;--yc-accent-3:#a78bfa;--yc-accent-4:#f472b6;--yc-accent-5:#34d399;--yc-text-1:#e6f1f6;--yc-text-2:#b8cdd6;--yc-text-3:#7a94a1;--yc-text-4:#6f8f9a;--yc-border:rgba(255,255,255,0.08);--yc-border-strong:rgba(255,255,255,0.14);--yc-card-bg:rgba(255,255,255,0.03);--yc-card-bg-2:rgba(255,255,255,0.05);--yc-ease:cubic-bezier(0.22,1,0.36,1);--secondary:#4f46e5;--light:#f8fafc;--dark:#0f172a;--gray:#64748b;--success:#10b981;--border:#e2e8f0}body{padding:0;margin:0;background:var(--yc-bg);color:var(--yc-text-1);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.75}.ycsx-container{position:relative;background:var(--yc-bg);min-height:100vh;overflow-x:hidden}.ycsx-wrap{max-width:960px;margin:0 auto;padding:0 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rgba(34,211,238,0.25))}.ycsx-hero-text{font-size:clamp(1.6rem,3.6vw,2.6rem);font-weight:800;color:var(--yc-text-1);letter-spacing:-0.5px;padding-top:18px}.ycsx-hero-text em{font-style:normal;display:block;font-size:.6em;font-weight:500;color:var(--yc-text-3);margin-top:8px;letter-spacing:0}.ycsx-hero-sub{font-size:1.02rem;line-height:1.9;color:var(--yc-text-2);max-width:720px;margin:0 0 40px}.ycsx-hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.ycsx-hero-stat{padding:22px 20px;background:linear-gradient(155deg,rgba(255,255,255,0.04),rgba(255,255,255,0.01));border:1px solid var(--yc-border);border-radius:16px;transition:all .35s var(--yc-ease)}.ycsx-hero-stat:hover{border-color:rgba(34,211,238,0.4);transform:translateY(-4px)}.ycsx-hero-stat b{display:block;font-size:1.85rem;font-weight:800;background:linear-gradient(120deg,#22d3ee,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.1;letter-spacing:-0.5px}.ycsx-hero-stat span{display:block;margin-top:6px;font-size:.82rem;color:var(--yc-text-3)}.ycsx-quicknav{padding:28px 0;background:var(--yc-bg-2);border-top:1px solid var(--yc-border);border-bottom:1px solid var(--yc-border)}.ycsx-quicknav-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.ycsx-quicknav-item{display:flex;flex-direction:column;gap:6px;padding:18px 16px;background:var(--yc-card-bg);border:1px solid var(--yc-border);border-radius:14px;text-decoration:none;color:inherit;position:relative;overflow:hidden;transition:all .35s var(--yc-ease)}.ycsx-quicknav-item::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--qnav-color,#22d3ee);transform:scaleY(0);transform-origin:top;transition:transform .4s 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40px;margin-bottom:60px;border-top:1px solid var(--yc-border)}.ycsx-advice-head{text-align:center;margin-bottom:50px}.ycsx-advice-eyebrow{display:inline-block;padding:5px 16px;background:rgba(244,114,182,0.1);border:1px solid rgba(244,114,182,0.24);color:#f472b6;border-radius:30px;font-size:12.5px;font-weight:700;letter-spacing:.5px;margin-bottom:16px}.ycsx-advice-head h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;color:var(--yc-text-1);margin:0;letter-spacing:-0.3px}.ycsx-advice-list{display:flex;flex-direction:column;gap:20px}.ycsx-advice-item{display:grid;grid-template-columns:80px 1fr;gap:26px;padding:28px 30px;background:linear-gradient(155deg,rgba(255,255,255,0.035),rgba(255,255,255,0.008));border:1px solid var(--yc-border);border-radius:18px;transition:all .4s var(--yc-ease);align-items:flex-start}.ycsx-advice-item:hover{border-color:rgba(244,114,182,0.4);transform:translateX(6px);box-shadow:0 20px 45px -22px rgba(244,114,182,0.3)}.ycsx-advice-num{font-family:'SF Mono',Menlo,Consolas,monospace;font-size:1.8rem;font-weight:900;letter-spacing:-0.04em;color:#f472b6;line-height:1;padding-top:4px}.ycsx-advice-content h3{font-size:1.12rem;font-weight:700;color:var(--yc-text-1);margin:0 0 10px;letter-spacing:-0.2px}.ycsx-advice-content p{font-size:.95rem;color:var(--yc-text-2);line-height:1.85;margin:0}.ycsx-cta{padding:40px 0 100px}.ycsx-cta-inner{padding:50px 40px;background:linear-gradient(155deg,rgba(34,211,238,0.06),rgba(167,139,250,0.04));border:1px solid rgba(34,211,238,0.2);border-radius:24px;text-align:center;position:relative;overflow:hidden}.ycsx-cta-inner::before{content:'';position:absolute;top:-60%;right:-20%;width:400px;height:400px;background:radial-gradient(circle,rgba(34,211,238,0.12),transparent 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0}.ycsx-quicknav-grid{grid-template-columns:1fr;gap:8px}.ycsx-quicknav-item{padding:14px 16px}.ycsx-main{padding:60px 0 40px}.ycsx-intro{padding-bottom:40px;margin-bottom:50px;font-size:1rem}.ycsx-case{padding-bottom:60px;margin-bottom:50px}.ycsx-case-head{flex-direction:column;gap:12px;margin-bottom:24px}.ycsx-case-num{font-size:3rem;-webkit-text-stroke-width:1.5px;padding-top:0}.ycsx-case-title{font-size:1.35rem}.ycsx-case-title span{font-size:.72em}.ycsx-facts{grid-template-columns:1fr 1fr;padding:16px 16px;gap:14px}.ycsx-fact-value{font-size:.88rem}.ycsx-subtitle{font-size:1.05rem;margin:28px 0 12px}.ycsx-case p{font-size:.95rem;line-height:1.9}.ycsx-note{padding:14px 16px;font-size:.88rem}.ycsx-experience{padding:22px 20px 20px;margin-top:28px}.ycsx-experience p{font-size:.9rem}.ycsx-common{padding:50px 0 20px;margin-bottom:40px}.ycsx-common-head{margin-bottom:32px}.ycsx-common-grid{grid-template-columns:1fr;gap:14px}.ycsx-common-item{padding:24px 22px 22px}.ycsx-common-icon{width:48px;height:48px;font-size:20px;margin-bottom:16px}.ycsx-advice{padding:50px 0 20px;margin-bottom:40px}.ycsx-advice-head{margin-bottom:32px}.ycsx-advice-item{grid-template-columns:1fr;gap:12px;padding:22px 22px}.ycsx-advice-num{font-size:1.5rem}.ycsx-advice-content h3{font-size:1rem}.ycsx-advice-content p{font-size:.9rem}.ycsx-cta{padding:30px 0 70px}.ycsx-cta-inner{padding:36px 24px;border-radius:20px}.ycsx-cta-badge{width:56px;height:56px;font-size:22px;margin-bottom:18px}.ycsx-cta-badges span{padding:6px 14px;font-size:.8rem}}@media(max-width:480px){.ycsx-facts{grid-template-columns:1fr}.ycsx-hero-stats{grid-template-columns:1fr}.ycsx-hero-num{font-size:3.5rem}.ycsx-hero-text{font-size:1.35rem}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#0a0e1a}::-webkit-scrollbar-thumb{background:linear-gradient(180deg,rgba(34,211,238,0.3),rgba(167,139,250,0.3));border-radius:10px}::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,rgba(34,211,238,0.5),rgba(167,139,250,0.5))}::selection{background:rgba(34,211,238,0.28);color:#fff}