:root{--bg-color: #f3f4f6;--card-bg: #ffffff;--text-main: #111827;--text-sub: #6b7280;--border-color: #d1d5db;--btn-blue: #3b82f6;--btn-blue-hover: #2563eb;--header-height: 73px}html.dark-theme,body.dark-theme{--bg-color: #0f172a;--card-bg: #111827;--text-main: #f3f4f6;--text-sub: #94a3b8;--border-color: #1f2937;--btn-blue: #60a5fa;--btn-blue-hover: #3b82f6}*{margin:0;padding:0;box-sizing:border-box;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}html,body{width:100%;overflow:hidden}body{background:var(--bg-color);color:var(--text-main);min-height:100vh}.page-shell{height:100vh;display:flex;flex-direction:column}.header{display:flex;align-items:center;justify-content:space-between;padding:16px 32px;background-color:var(--bg-color);border-bottom:.2px solid var(--border-color);position:sticky;top:0;z-index:20;min-height:var(--header-height);flex-shrink:0}.header-left,.header-actions{display:flex;align-items:center;gap:18px}.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;color:var(--text-main);align-items:center;justify-content:center;padding:8px;border-radius:8px;font-size:18px}.mobile-menu-btn:hover{background-color:#0000000d}.mobile-nav{position:fixed;top:var(--header-height);left:16px;right:16px;background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;padding:14px;display:none;flex-direction:column;gap:10px;z-index:999;box-shadow:0 18px 36px #0000001f}.mobile-nav.show{display:flex}.mobile-nav a{text-decoration:none;color:var(--text-main);font-size:14px;padding:8px 4px}.logo-container{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text-main);font-size:18px;font-weight:600;white-space:nowrap}.logo-container img{width:28px;height:28px;object-fit:contain}.header-links{display:flex;gap:24px;margin-left:18px}.header-links a{text-decoration:none;color:var(--text-sub);font-size:14px;font-weight:400}.header-links a:hover,.header-links a.active{color:var(--text-main)}.theme-toggle{background:none;border:none;cursor:pointer;color:var(--text-main);display:flex;align-items:center;justify-content:center;padding:8px;border-radius:8px;font-size:18px;transition:background .2s ease}.theme-toggle:hover{background-color:#0000000d}body.dark-theme .theme-toggle:hover{background-color:#ffffff0d}.main-content{flex:1;overflow-y:auto;overflow-x:hidden;scrollbar-width:thin;scrollbar-color:rgba(148,163,184,.5) transparent}.main-content::-webkit-scrollbar{width:10px}.main-content::-webkit-scrollbar-thumb{background:#94a3b873;border-radius:999px;border:2px solid transparent;background-clip:padding-box}.content-area{width:100%;max-width:1200px;margin:0 auto;padding:32px 32px 48px}.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:22px;color:var(--text-sub);font-size:13px}.breadcrumbs a{color:var(--text-sub);text-decoration:none}.breadcrumbs a:hover{color:var(--text-main)}.hero{margin-bottom:28px}.hero h1{font-size:clamp(2rem,3.4vw,3rem);line-height:1.08;margin-bottom:14px}.hero p{font-size:17px;line-height:1.75;color:var(--text-sub);max-width:68ch}.page-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start}.content-card,.side-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:22px}.content-card{padding:30px 30px 34px}.side-card{padding:22px;position:sticky;top:24px}.content-block+.content-block{margin-top:28px;padding-top:28px;border-top:1px solid var(--border-color)}.content-block h2{font-size:22px;line-height:1.2;margin-bottom:14px;color:var(--text-main)}.content-block p,.content-block li{font-size:15px;line-height:1.9;color:var(--text-sub)}.content-block p+p{margin-top:14px}.content-block ul{margin-top:8px;padding-left:18px}.content-block li+li{margin-top:10px}.side-card h3{font-size:18px;margin-bottom:12px}.side-card p,.side-card li{font-size:14px;line-height:1.8;color:var(--text-sub)}.side-card ul{list-style:none;margin-top:12px}.side-card li+li{margin-top:10px}.link-list{list-style:none!important;padding-left:0!important;margin-top:8px}.link-list li{padding:16px 18px;border-radius:16px;background:#94a3b814}.link-list li+li{margin-top:14px}.link-list a{color:var(--text-main);font-weight:600;text-decoration:none}.link-list a:hover{color:var(--btn-blue)}.link-meta{margin-top:6px;color:var(--text-sub);font-size:14px;line-height:1.75}.contact-box{display:inline-flex;align-items:center;gap:10px;margin-top:12px;padding:14px 18px;border-radius:14px;background:#3b82f614;color:var(--text-main);text-decoration:none;font-weight:600}.contact-box:hover{background:#3b82f624}.footer-band{margin-top:36px;background:var(--card-bg);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.footer-inner{width:100%;max-width:1200px;margin:0 auto;padding:28px 32px}.footer-top{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;flex-wrap:wrap}.footer-brand .logo-container{margin-bottom:10px}.footer-brand p{color:var(--text-sub);font-size:14px;line-height:1.7}.footer-links{display:flex;flex-wrap:wrap;gap:12px 18px}.footer-links a{color:var(--text-sub);text-decoration:none;font-size:14px}.footer-links a:hover,.footer-links a.active{color:var(--text-main)}.footer-bottom{margin-top:18px;padding-top:16px;border-top:1px solid var(--border-color);color:var(--text-sub);font-size:12px}.scroll-top-btn{position:fixed;right:22px;bottom:24px;width:42px;height:42px;border:none;border-radius:999px;background:var(--btn-blue);color:#fff;box-shadow:0 10px 24px #3b82f659;cursor:pointer;display:none;align-items:center;justify-content:center;z-index:999}.scroll-top-btn.show{display:flex}a{color:var(--btn-blue)}@media(max-width:1024px){.page-grid{grid-template-columns:1fr}.side-card{position:static}}@media(max-width:900px){.header-links{display:none}.mobile-menu-btn{display:inline-flex}}@media(max-width:768px){.header{padding:14px 20px}.content-area,.footer-inner{padding:22px 20px 34px}.content-card{padding:24px 20px 28px}}@media(max-width:560px){.hero h1{font-size:2rem}}