:root{color-scheme:light;--bg-body:#fafbfc;--bg-white:#fff;--bg-subtle:#f1f5f9;--bg-dark:#0f172a;--bg-dark-card:#0f172af2;--ink-primary:#0f172a;--ink-secondary:#475569;--ink-muted:#64748b;--ink-faint:#94a3b8;--ink-inverse:#f8fafc;--ink-inverse-muted:#cbd5e1;--line-subtle:#e2e8f0;--line-medium:#cbd5e1;--line-dark:#94a3b8;--brand:#4f46e5;--brand-light:#6366f1;--brand-faint:#e0e7ff;--brand-ultra-faint:#f0f0ff;--cyan:#0891b2;--cyan-faint:#cffafe;--emerald:#059669;--emerald-faint:#ecfdf5;--amber:#d97706;--amber-faint:#fef3c7;--rose:#e11d48;--rose-faint:#fff1f2;--sky:#0284c7;--sky-faint:#f0f9ff;--gradient-brand:linear-gradient(135deg, #4f46e5 0%, #0891b2 100%);--gradient-brand-subtle:linear-gradient(135deg, #4f46e514 0%, #0891b214 100%);--gradient-hero:linear-gradient(160deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);--gradient-section-alt:linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);--gradient-card-hover:linear-gradient(180deg, #4f46e508 0%, transparent 100%);--gradient-text:linear-gradient(135deg, #4f46e5 0%, #0891b2 100%);--shadow-xs:0 1px 2px #0000000a;--shadow-sm:0 1px 3px #0000000f, 0 1px 2px #0000000a;--shadow-md:0 4px 6px -1px #00000012, 0 2px 4px -2px #0000000d;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -4px #0000000a;--shadow-xl:0 20px 25px -5px #00000014, 0 8px 10px -6px #0000000a;--shadow-brand:0 4px 14px #4f46e526;--shadow-brand-lg:0 10px 25px #4f46e533;--content-width:min(1140px, calc(100% - 48px));--content-wide:min(1280px, calc(100% - 48px));--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--ease-out:cubic-bezier(.16, 1, .3, 1);--transition-fast:.15s var(--ease-out);--transition-base:.2s var(--ease-out);--transition-slow:.3s var(--ease-out)}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;min-height:100%}body{min-height:100vh;color:var(--ink-primary);background:var(--bg-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;margin:0;font-family:Plus Jakarta Sans,Noto Sans SC,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:15px;line-height:1.7}::selection{color:#fff;background:var(--brand)}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}p{margin:0}ul,ol{margin:0;padding:0;list-style:none}.skip-link{z-index:100;border-radius:var(--radius-sm);color:#fff;background:var(--brand);transition:transform var(--transition-base);padding:10px 18px;font-size:14px;font-weight:700;position:fixed;top:12px;left:16px;transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}:focus-visible{outline-offset:2px;outline:3px solid #4f46e580}.site-header{z-index:50;-webkit-backdrop-filter:blur(20px)saturate(180%);border-bottom:1px solid var(--line-subtle);background:#fffc;justify-content:space-between;align-items:center;gap:24px;min-height:68px;padding:0 max(20px,50vw - 640px);display:flex;position:sticky;top:0}.brand{flex-shrink:0;align-items:center;gap:12px;display:inline-flex}.brand-mark{border-radius:var(--radius-sm);color:#fff;background:var(--gradient-brand);letter-spacing:-.5px;place-items:center;width:36px;height:36px;font-size:13px;font-weight:900;display:grid;box-shadow:0 2px 8px #4f46e54d}.brand strong{color:var(--ink-primary);letter-spacing:-.01em;font-size:15px;font-weight:800;line-height:1.2;display:block}.brand small{color:var(--ink-muted);font-size:11px;font-weight:500;display:block}.site-header nav{align-items:center;gap:2px;display:flex}.site-header nav a{border-radius:var(--radius-full);color:var(--ink-secondary);transition:all var(--transition-fast);white-space:nowrap;flex:none;align-items:center;min-height:44px;padding:6px 14px;font-size:13px;font-weight:600;display:inline-flex}.site-header nav a:hover{color:var(--ink-primary);background:var(--bg-subtle)}.site-header nav a[aria-current=page]{color:var(--brand);background:var(--brand-faint)}.header-actions{flex-shrink:0;align-items:center;gap:12px;display:flex}.header-wechat-button{min-height:38px;padding:0 16px;font-size:13px}.nav-toggle{border:1px solid var(--line-subtle);border-radius:var(--radius-sm);background:var(--bg-white);cursor:pointer;flex:none;justify-content:center;align-items:center;width:44px;height:44px;display:none}.nav-toggle-icon,.nav-toggle-icon:before,.nav-toggle-icon:after{content:"";background:var(--ink-primary);width:18px;height:2px;transition:transform var(--transition-base), opacity var(--transition-base);border-radius:2px;display:block}.nav-toggle-icon{position:relative}.nav-toggle-icon:before{position:absolute;top:-6px;left:0}.nav-toggle-icon:after{position:absolute;top:6px;left:0}.header-cta-short{display:none}.button{border-radius:var(--radius-md);cursor:pointer;min-height:44px;transition:all var(--transition-base);white-space:nowrap;border:none;justify-content:center;align-items:center;gap:8px;padding:0 24px;font-size:14px;font-weight:700;line-height:1;display:inline-flex}.button.primary{color:#fff;background:var(--gradient-brand);box-shadow:var(--shadow-brand)}.button.primary:hover{box-shadow:var(--shadow-brand-lg);transform:translateY(-1px)}.button.primary:active{transform:translateY(0)}.button.secondary{color:var(--ink-inverse);backdrop-filter:blur(8px);background:#ffffff14;border:1px solid #fff3}.button.secondary:hover{background:#ffffff24;border-color:#fff6;transform:translateY(-1px)}.button.light-secondary{color:var(--ink-primary);border:1px solid var(--line-medium);background:var(--bg-white);box-shadow:var(--shadow-xs)}.button.light-secondary:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.page-hero{color:#fff;background:var(--gradient-hero);padding:72px 0 80px;position:relative;overflow:hidden}.page-hero:before{pointer-events:none;content:"";background:radial-gradient(circle,#4f46e526 0%,#0000 70%);width:600px;height:600px;position:absolute;top:-30%;right:-10%}.page-hero-inner{z-index:2;width:var(--content-width);max-width:800px;margin:0 auto;position:relative}.page-hero h1{color:#fff;letter-spacing:-.02em;margin:0;font-size:clamp(32px,5vw,48px);font-weight:800;line-height:1.15}.page-hero p{color:var(--ink-inverse-muted);max-width:640px;margin-top:16px;font-size:clamp(16px,2vw,18px);line-height:1.7}.breadcrumb-inline{color:var(--ink-muted);margin-bottom:12px;font-size:13px}.breadcrumb-inline a{color:var(--ink-muted)}.breadcrumb-inline a:hover{color:#fff}.breadcrumb-current{color:#c7d2fe}.hero-tag-muted{color:#a5b4fc;background:#6366f133}.hero-title-spaced,.card-title-spaced{margin-top:16px}.article-meta-row{color:#cbd5e1;flex-wrap:wrap;gap:16px;margin-top:20px;font-size:13px;display:flex}.hero-role-switcher-card{backdrop-filter:blur(16px);background:linear-gradient(#1e1b4bd9 0%,#0f172af2 100%);border:2px solid #818cf873;border-radius:18px;margin-top:20px;margin-bottom:32px;padding:20px 24px;box-shadow:0 12px 40px #4f46e538,inset 0 1px #ffffff26}.role-switcher-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:16px;display:flex}.role-switcher-tag{color:#fff;letter-spacing:.02em;background:linear-gradient(90deg,#4f46e5 0%,#7c3aed 100%);border-radius:8px;align-items:center;gap:6px;padding:5px 14px;font-size:13px;font-weight:800;display:inline-flex;box-shadow:0 2px 10px #6366f166}.role-switcher-hint{color:#cbd5e1;font-size:13px;font-weight:500}.hero-role-filter{grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr));gap:12px;display:grid}.hero-role-chip{color:#f1f5f9;cursor:pointer;background:#ffffff14;border:1.5px solid #fff3;border-radius:12px;justify-content:center;align-items:center;gap:8px;min-width:0;padding:14px 18px;font-size:15px;font-weight:700;text-decoration:none;transition:all .22s cubic-bezier(.4,0,.2,1);display:flex;position:relative}.hero-role-chip .chip-icon{font-size:20px}.hero-role-chip:hover{color:#fff;background:#6366f159;border-color:#a5b4fc;transform:translateY(-3px);box-shadow:0 8px 24px #6366f166}.hero-role-chip.active{color:#fff;background:linear-gradient(135deg,#4f46e5 0%,#9333ea 100%);border-color:#c084fc;font-weight:800;box-shadow:0 8px 28px #9333ea8c,0 0 0 2px #c084fc4d}.chip-active-badge{color:#6ee7b7;background:#00000073;border:1px solid #6ee7b766;border-radius:999px;align-items:center;gap:4px;padding:3px 9px;font-size:11px;font-weight:800;line-height:1.2;display:inline-flex}.pulse-dot{background:#34d399;border-radius:50%;width:6px;height:6px;animation:1.6s ease-in-out infinite pulseDot;display:inline-block;box-shadow:0 0 8px #34d399}.chip-hover-hint{color:#cbd5e1;opacity:.7;font-size:11px;font-weight:600;transition:opacity .2s}.hero-role-chip:hover .chip-hover-hint{opacity:1;color:#fff}@keyframes pulseDot{0%,to{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(1.3)}}.not-found-hero{text-align:center;padding:64px 20px}.not-found-inner{max-width:680px}.danger-tag{color:#fca5a5;background:#ef444433}.not-found-title{margin-top:16px;font-size:36px}.not-found-copy{color:var(--ink-inverse-muted);margin-top:12px;font-size:16px}.centered-actions{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:24px;display:flex}.hero{color:#fff;background:var(--gradient-hero);padding:88px 0 110px;position:relative;overflow:hidden}.hero:before{pointer-events:none;content:"";background:radial-gradient(800px 500px at 30% 40%,#4f46e51f 0%,#0000 70%),radial-gradient(600px 400px at 75% 60%,#0891b214 0%,#0000 70%);position:absolute;inset:0}.hero-inner{z-index:2;width:var(--content-width);margin:0 auto;position:relative}.hero-grid{grid-template-columns:1.15fr .85fr;align-items:center;gap:48px;display:grid}.hero-badge{border-radius:var(--radius-full);color:#a5b4fc;letter-spacing:.02em;background:#4f46e51a;border:1px solid #4f46e54d;align-items:center;gap:8px;margin-bottom:24px;padding:5px 14px;font-size:12px;font-weight:700;display:inline-flex}.badge-dot{background:var(--cyan);width:6px;height:6px;box-shadow:0 0 8px var(--cyan);border-radius:50%;animation:2s ease-in-out infinite pulse-dot}@keyframes pulse-dot{0%,to{opacity:1}50%{opacity:.4}}.hero h1{color:#fff;letter-spacing:-.03em;margin:0;font-size:clamp(40px,5.5vw,58px);font-weight:900;line-height:1.1}.gradient-text{background:linear-gradient(135deg,#c7d2fe 0%,#a5f3fc 100%);-webkit-text-fill-color:transparent;background-clip:text}.hero-lede{color:#94a3b8;max-width:560px;margin-top:20px;font-size:clamp(16px,2vw,18px);line-height:1.75}.hero-actions{flex-wrap:wrap;gap:12px;margin-top:32px;display:flex}.hero-meta{flex-wrap:wrap;gap:8px;margin-top:36px;display:flex}.hero-meta li{border-radius:var(--radius-full);color:#cbd5e1;background:#ffffff0a;border:1px solid #ffffff14;align-items:center;gap:6px;padding:6px 14px;font-size:12px;font-weight:600;display:inline-flex}.hero-meta li:before{content:"";background:var(--cyan);width:5px;height:5px;box-shadow:0 0 6px var(--cyan);border-radius:50%}.trust-strip-wrapper{z-index:10;width:var(--content-width);margin:-48px auto 0;position:relative}.trust-strip{border-radius:var(--radius-xl);background:var(--bg-white);box-shadow:var(--shadow-xl);grid-template-columns:repeat(3,1fr);display:grid;overflow:hidden}.trust-item{text-align:center;border-right:1px solid var(--line-subtle);transition:background var(--transition-base);padding:32px 36px}.trust-item:last-child{border-right:none}.trust-item:hover{background:var(--brand-ultra-faint)}.trust-item strong{background:var(--gradient-text);-webkit-text-fill-color:transparent;letter-spacing:-.02em;background-clip:text;font-size:clamp(28px,4vw,40px);font-weight:900;line-height:1;display:block}.trust-item span{color:var(--ink-primary);margin-top:8px;font-size:15px;font-weight:700;display:block}.trust-item p{color:var(--ink-muted);margin-top:4px;font-size:13px;line-height:1.5}.section{width:var(--content-width);margin:0 auto;padding:clamp(72px,10vw,112px) 0}.section+.section{border-top:1px solid var(--line-subtle)}.section-header{grid-template-columns:1fr 320px;align-items:end;gap:40px;margin-bottom:44px;display:grid}.section-kicker{color:var(--brand);letter-spacing:.06em;text-transform:uppercase;align-items:center;gap:8px;margin-bottom:12px;font-size:12px;font-weight:800;display:inline-flex}.section-kicker:before{content:"";background:var(--gradient-brand);border-radius:1px;width:20px;height:2px}.section h2{color:var(--ink-primary);letter-spacing:-.02em;margin:0;font-size:clamp(26px,3.5vw,38px);font-weight:800;line-height:1.2}.section-header p{color:var(--ink-muted);font-size:15px;line-height:1.7}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.grid-3{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.grid-4{grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:20px;display:grid}.card-panel{border:1px solid var(--line-subtle);border-radius:var(--radius-lg);background:var(--bg-white);height:100%;box-shadow:var(--shadow-xs);transition:all var(--transition-base);flex-direction:column;padding:28px;display:flex;position:relative}.card-panel:before{border-radius:var(--radius-lg);opacity:0;background:var(--gradient-card-hover);transition:opacity var(--transition-base);pointer-events:none;position:absolute;inset:0}.card-panel:hover{border-color:var(--line-medium);box-shadow:var(--shadow-md);transform:translateY(-2px)}.card-panel:hover:before{opacity:1}.card-tag{border-radius:var(--radius-full);width:fit-content;color:var(--brand);background:var(--brand-faint);letter-spacing:.02em;align-items:center;padding:4px 10px;font-size:11px;font-weight:700;display:inline-flex}.card-panel h3{color:var(--ink-primary);letter-spacing:-.01em;margin:14px 0 8px;font-size:18px;font-weight:700;line-height:1.3}.card-panel h4{color:var(--ink-primary);letter-spacing:.03em;text-transform:uppercase;margin:0 0 8px;font-size:13px;font-weight:800}.card-panel p{color:var(--ink-muted);font-size:14px;line-height:1.65}.check-list{gap:10px;margin-top:16px;display:grid}.check-list li{color:var(--ink-secondary);padding-left:22px;font-size:14px;line-height:1.55;position:relative}.check-list li:before{content:"";background:var(--brand-faint);border-radius:50%;width:14px;height:14px;position:absolute;top:5px;left:0}.check-list li:after{content:"";background:var(--brand);border-radius:50%;width:7px;height:7px;position:absolute;top:7px;left:3.5px}.feature-band{color:#fff;background:var(--gradient-hero);width:100%;margin:0;padding:clamp(72px,10vw,112px) 0;position:relative;overflow:hidden}.feature-band:before{pointer-events:none;content:"";background:radial-gradient(700px 400px at 25%,#4f46e51a 0%,#0000 70%),radial-gradient(500px 300px at 80% 30%,#0891b20f 0%,#0000 70%);position:absolute;inset:0}.feature-band-inner{z-index:2;width:var(--content-width);margin:0 auto;position:relative}.feature-band .section-kicker{color:#a5f3fc}.feature-band .section-kicker:before{background:var(--cyan)}.feature-band h2{color:#fff}.feature-band .section-header p{color:#94a3b8}.feature-band .card-panel{backdrop-filter:blur(12px);background:#ffffff0a;border-color:#ffffff14}.feature-band .card-panel:hover{border-color:#ffffff26;box-shadow:0 8px 24px #0000004d}.feature-band .card-panel:before{background:linear-gradient(#4f46e50f 0%,#0000 100%)}.feature-band .card-panel h3,.feature-band .card-panel h4{color:#fff}.feature-band .card-panel p{color:#94a3b8}.feature-band .check-list li{color:#cbd5e1}.mentor-section{padding-top:clamp(72px,9vw,104px)}.mentor-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;display:grid}.mentor-card{border:1px solid var(--line-subtle);border-radius:var(--radius-lg);min-width:0;min-height:100%;box-shadow:var(--shadow-sm);transition:all var(--transition-base);background:linear-gradient(#fffffff5 0%,#f8fafcfa 100%);flex-direction:column;padding:24px;display:flex;position:relative;overflow:hidden}.mentor-card:before{content:"";background:var(--mentor-color);height:4px;position:absolute;inset:0 0 auto}.mentor-card:after{pointer-events:none;content:"";background:color-mix(in srgb, var(--mentor-color) 16%, transparent);border-radius:50%;width:160px;height:160px;position:absolute;top:-72px;right:-72px}.mentor-card:hover{border-color:color-mix(in srgb, var(--mentor-color) 35%, var(--line-subtle));box-shadow:var(--shadow-lg);transform:translateY(-3px)}.mentor-card-head{z-index:1;align-items:flex-start;gap:14px;display:flex;position:relative}.mentor-avatar{border-radius:var(--radius-md);color:#fff;background:var(--mentor-color);width:68px;height:68px;box-shadow:0 8px 18px color-mix(in srgb, var(--mentor-color) 26%, transparent);flex:none;place-items:center;display:grid;overflow:hidden}.mentor-avatar img{object-fit:cover;width:100%;height:100%}.mentor-avatar span{letter-spacing:0;font-size:14px;font-weight:900}.mentor-role{color:var(--mentor-color);letter-spacing:.04em;text-transform:uppercase;font-size:11px;font-weight:900;line-height:1.2;display:block}.mentor-card h3{color:var(--ink-primary);margin:5px 0 4px;font-size:19px;font-weight:800;line-height:1.2}.mentor-card-head p{color:var(--ink-secondary);font-size:13px;font-weight:650;line-height:1.45}.mentor-company-row,.mentor-round-tags{flex-wrap:wrap;gap:6px;display:flex}.mentor-company-row{margin-top:18px}.mentor-company-row span{border:1px solid color-mix(in srgb, var(--mentor-color) 25%, var(--line-subtle));border-radius:var(--radius-full);min-height:26px;color:var(--ink-secondary);background:#fff;align-items:center;padding:3px 10px;font-size:12px;font-weight:700;display:inline-flex}.mentor-focus-block{border:1px solid color-mix(in srgb, var(--mentor-color) 18%, var(--line-subtle));border-radius:var(--radius-md);background:color-mix(in srgb, var(--mentor-color) 8%, #fff);margin-top:18px;padding:14px}.mentor-focus-block span{color:var(--ink-muted);letter-spacing:.05em;text-transform:uppercase;font-size:11px;font-weight:900;display:block}.mentor-focus-block strong{color:var(--ink-primary);margin-top:6px;font-size:15px;font-weight:850;line-height:1.45;display:block}.mentor-fit{color:var(--ink-secondary);margin-top:14px;font-size:14px;line-height:1.65}.mentor-round-tags{margin-top:16px}.mentor-round-tags span{border-radius:var(--radius-full);min-height:24px;color:var(--mentor-color);background:color-mix(in srgb, var(--mentor-color) 10%, #fff);align-items:center;padding:3px 9px;font-size:11px;font-weight:800;display:inline-flex}.mentor-card-actions{justify-content:space-between;align-items:center;gap:12px;margin-top:auto;padding-top:22px;display:flex}.mentor-copy-button{border-radius:var(--radius-sm);color:#fff;background:var(--mentor-color);cursor:pointer;min-height:38px;box-shadow:0 8px 18px color-mix(in srgb, var(--mentor-color) 24%, transparent);transition:all var(--transition-base);white-space:nowrap;border:0;justify-content:center;align-items:center;padding:0 14px;font-size:13px;font-weight:850;display:inline-flex}.mentor-copy-button:hover{box-shadow:0 12px 24px color-mix(in srgb, var(--mentor-color) 30%, transparent);transform:translateY(-1px)}.mentor-card-actions a{color:var(--ink-muted);transition:color var(--transition-fast);white-space:nowrap;font-size:13px;font-weight:800}.mentor-card-actions a:hover{color:var(--mentor-color)}.role-card{border:1px solid var(--line-subtle);border-radius:var(--radius-lg);background:var(--bg-white);height:100%;box-shadow:var(--shadow-xs);transition:all 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