*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--c-primary: #0f172a;--c-accent: #2563eb;--c-accent-hover: #1d4ed8;--c-accent-light: #dbeafe;--c-text: #1e293b;--c-text-secondary: #64748b;--c-text-light: #94a3b8;--c-bg: #ffffff;--c-bg-alt: #f8fafc;--c-bg-card: #ffffff;--c-border: #e2e8f0;--c-border-light: #f1f5f9;--shadow-sm: 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 4px 12px rgba(0,0,0,.06);--shadow-lg: 0 12px 32px rgba(0,0,0,.08);--radius: 10px;--radius-sm: 6px;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--max-w: 960px;--max-w-wide: 1100px;--header-h: 60px}html{scroll-behavior:smooth}body{font-family:var(--font-sans);color:var(--c-text);background:var(--c-bg);line-height:1.7;font-size:15px;min-height:100vh;-webkit-font-smoothing:antialiased}a{color:var(--c-accent);text-decoration:none;transition:color .2s}a:hover{color:var(--c-accent-hover)}img{max-width:100%;height:auto;border-radius:var(--radius-sm)}::selection{background:var(--c-accent);color:#fff}.site-header{position:sticky;top:0;z-index:100;background:#ffffffeb;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--c-border-light);height:var(--header-h);display:flex;align-items:center}.site-header__inner{max-width:var(--max-w-wide);margin:0 auto;padding:0 28px;width:100%;display:flex;align-items:center;justify-content:space-between}.site-header__logo{display:flex;align-items:center;gap:8px;font-size:1.05rem;font-weight:800;color:var(--c-primary);letter-spacing:-.3px}.site-header__logo-mark{width:28px;height:28px;background:var(--c-accent);border-radius:6px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:.85rem;font-weight:700}.site-header__nav{display:flex;align-items:center;gap:2px}.site-header__nav a{color:var(--c-text-secondary);font-size:.85rem;padding:6px 14px;border-radius:var(--radius-sm);transition:all .2s;font-weight:500}.site-header__nav a:hover{color:var(--c-accent);background:var(--c-accent-light);text-decoration:none}.site-main{max-width:var(--max-w);margin:0 auto;padding:36px 28px 80px;min-height:calc(100vh - var(--header-h) - 200px)}.site-main--wide{max-width:var(--max-w-wide)}.breadcrumb{font-size:.8rem;color:var(--c-text-light);margin-bottom:20px;display:flex;align-items:center;flex-wrap:wrap;gap:4px}.breadcrumb a{color:var(--c-text-light)}.breadcrumb a:hover{color:var(--c-accent)}h1{font-size:1.85rem;font-weight:800;margin-bottom:12px;line-height:1.3;letter-spacing:-.5px;color:var(--c-primary)}h2{font-size:1.25rem;font-weight:700;margin:44px 0 14px;padding-bottom:10px;color:var(--c-primary);letter-spacing:-.3px;border-bottom:2px solid var(--c-border-light)}h3{font-size:1.05rem;font-weight:600;margin:28px 0 10px;color:var(--c-primary)}p{margin-bottom:16px;color:var(--c-text-secondary);line-height:1.85;font-size:.95rem}ul,ol{padding-left:22px;margin-bottom:18px;color:var(--c-text-secondary);font-size:.95rem}li{margin-bottom:6px}strong{color:var(--c-primary);font-weight:600}blockquote{border-left:3px solid var(--c-accent);background:var(--c-bg-alt);padding:12px 18px;margin:20px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--c-text-secondary);font-size:.9rem}code{background:var(--c-bg-alt);padding:2px 8px;border-radius:4px;font-size:.85em;color:var(--c-accent);border:1px solid var(--c-border-light)}pre{background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius-sm);padding:16px 20px;overflow-x:auto;margin:20px 0;font-size:.85rem;line-height:1.6}table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.9rem}th,td{padding:10px 14px;border:1px solid var(--c-border);text-align:left}th{background:var(--c-bg-alt);font-weight:600;color:var(--c-primary)}tr:nth-child(2n){background:var(--c-bg-alt)}hr{border:none;border-top:1px solid var(--c-border-light);margin:40px 0}.info-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin:20px 0 28px}.info-card{background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius);padding:16px 14px;text-align:center;transition:border-color .2s}.info-card:hover{border-color:var(--c-accent)}.info-card__label{font-size:.7rem;color:var(--c-text-light);letter-spacing:.3px;margin-bottom:4px;text-transform:uppercase}.info-card__value{font-size:1.05rem;font-weight:700;color:var(--c-primary)}.faq-item{border:1px solid var(--c-border);border-radius:var(--radius-sm);margin-bottom:10px;overflow:hidden;background:var(--c-bg-card)}.faq-q{padding:14px 18px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:.9rem;color:var(--c-primary);user-select:none;transition:background .15s}.faq-q:hover{background:var(--c-bg-alt)}.faq-q span{color:var(--c-text-light);font-size:.75rem;transition:transform .2s}.faq-item.open .faq-q span{transform:rotate(180deg)}.faq-a{padding:0 18px 16px;color:var(--c-text-secondary);display:none;font-size:.9rem;line-height:1.75}.faq-item.open .faq-a{display:block}.related-links{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 20px}.related-links a{border:1px solid var(--c-border);border-radius:20px;padding:5px 14px;font-size:.82rem;color:var(--c-text-secondary);transition:all .2s}.related-links a:hover{background:var(--c-accent);color:#fff;border-color:var(--c-accent);text-decoration:none}.disclaimer{font-size:.78rem;color:var(--c-text-light);background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius-sm);padding:12px 16px;margin-top:36px;line-height:1.6}.grid-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px}.grid-card{background:var(--c-bg-card);border:1px solid var(--c-border);border-radius:var(--radius);padding:20px 18px;box-shadow:var(--shadow-sm);transition:all .25s;display:block;text-decoration:none}.grid-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--c-accent);text-decoration:none}.grid-card__title{font-weight:600;color:var(--c-primary);margin-bottom:4px;font-size:.95rem}.grid-card__desc{font-size:.82rem;color:var(--c-text-light);line-height:1.5}.hero{text-align:center;padding:60px 0 44px}.hero h1{font-size:2.2rem;font-weight:800;margin-bottom:14px;color:var(--c-primary)}.hero p{font-size:1rem;color:var(--c-text-secondary);max-width:560px;margin:0 auto;line-height:1.7}.hero-sub{display:inline-flex;align-items:center;gap:6px;background:var(--c-accent-light);color:var(--c-accent);font-size:.78rem;font-weight:600;padding:4px 14px;border-radius:20px;margin-bottom:20px}.section-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px;margin:28px 0}.section-card{background:var(--c-bg-card);border:1px solid var(--c-border);border-radius:var(--radius);padding:24px 20px;box-shadow:var(--shadow-sm);transition:all .25s;display:block;text-decoration:none}.section-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--c-accent);text-decoration:none}.section-card__icon{width:40px;height:40px;background:var(--c-accent-light);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1.1rem;margin-bottom:14px}.section-card__title{font-weight:700;font-size:1rem;color:var(--c-primary);margin-bottom:6px}.section-card__desc{font-size:.82rem;color:var(--c-text-light);line-height:1.6}.section-card__count{display:inline-block;margin-top:10px;font-size:.78rem;color:var(--c-accent);font-weight:600;transition:gap .2s;display:inline-flex;align-items:center;gap:4px}.section-card:hover .section-card__count{gap:8px}.latest-section{margin:44px 0}.latest-section h2{margin-top:0}.site-footer{background:var(--c-primary);color:#fff9;padding:52px 28px 36px;margin-top:0}.site-footer__inner{max-width:var(--max-w-wide);margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:32px}.site-footer__brand{font-size:1rem;font-weight:700;color:#fff;margin-bottom:6px}.site-footer__desc{font-size:.82rem;line-height:1.6;margin-bottom:0}.site-footer__links{display:flex;flex-wrap:wrap;gap:6px 18px;align-content:flex-start}.site-footer__links a{color:#ffffff8c;font-size:.82rem;transition:color .2s}.site-footer__links a:hover{color:#fff}.site-footer__bottom{max-width:var(--max-w-wide);margin:28px auto 0;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);text-align:center;font-size:.78rem;color:#ffffff59}@media (max-width: 768px){.site-header__nav{display:none}.site-header__inner{justify-content:center}.hero{padding:36px 0 28px}.hero h1{font-size:1.65rem}.hero p{font-size:.9rem}h1{font-size:1.45rem}h2{font-size:1.1rem}.site-main{padding:24px 18px 60px}.info-cards{grid-template-columns:repeat(2,1fr)}.grid-list,.section-cards{grid-template-columns:1fr}.site-footer__inner{grid-template-columns:1fr;gap:24px}}.mobile-menu-btn{display:none;background:none;border:none;font-size:1.35rem;color:var(--c-primary);cursor:pointer;padding:4px;line-height:1}@media (max-width: 768px){.mobile-menu-btn{display:block;position:absolute;left:16px;top:50%;transform:translateY(-50%)}.site-header__nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:#fffffffa;backdrop-filter:blur(16px);border-bottom:1px solid var(--c-border);flex-direction:column;padding:8px 16px;gap:2px;box-shadow:var(--shadow-lg)}.site-header__nav.open{display:flex}.site-header__nav a{padding:10px 12px;font-size:.9rem;border-radius:var(--radius-sm)}.site-header__inner{position:relative}}