:root{--primary:#1a3a5c;--primary-light:#2d5a8c;--primary-dark:#0f2440;--accent:#4a9eff;--accent-glow:rgba(74,158,255,.35);--pink:#ff6b9d;--purple:#8b5cf6;--cyan:#06b6d4;--bg:#f5f7fa;--bg-card:#ffffff;--bg-glass:rgba(255,255,255,.72);--bg-glass-border:rgba(255,255,255,.5);--text:#1a2a3a;--text-secondary:#4a5a6a;--text-muted:#8899aa;--border:#e2e8f0;--shadow-sm:0 2px 8px rgba(26,58,92,.06);--shadow-md:0 8px 24px rgba(26,58,92,.1);--shadow-lg:0 16px 48px rgba(26,58,92,.14);--shadow-glow:0 8px 32px rgba(74,158,255,.25);--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--radius-xl:28px;--radius-full:9999px;--transition:all .3s cubic-bezier(.4,0,.2,1);--font:'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;--max-width:1200px;--header-height:72px}
[data-theme="dark"]{--primary:#4a9eff;--primary-light:#6bb3ff;--primary-dark:#1a3a5c;--accent:#6bb3ff;--accent-glow:rgba(107,179,255,.3);--bg:#0f1620;--bg-card:#1a2433;--bg-glass:rgba(26,36,51,.78);--bg-glass-border:rgba(74,158,255,.15);--text:#e8eef5;--text-secondary:#b0c0d0;--text-muted:#7a8a9a;--border:#2a3a4a;--shadow-sm:0 2px 8px rgba(0,0,0,.3);--shadow-md:0 8px 24px rgba(0,0,0,.4);--shadow-lg:0 16px 48px rgba(0,0,0,.5);--shadow-glow:0 8px 32px rgba(74,158,255,.2)}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 20px);-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.75;font-size:16px;overflow-x:hidden;transition:background .4s ease,color .4s ease;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-light)}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;font-size:inherit}
input{font-family:inherit;font-size:inherit}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;top:-100px;left:16px;z-index:10000;background:var(--primary);color:#fff;padding:12px 24px;border-radius:var(--radius-sm);font-weight:600;transition:top .3s}
.skip-link:focus{top:16px;color:#fff}
#site-header{position:sticky;top:0;z-index:1000;background:var(--bg-glass);backdrop-filter:blur(18px) saturate(180%);-webkit-backdrop-filter:blur(18px) saturate(180%);border-bottom:1px solid var(--bg-glass-border);transition:var(--transition);height:var(--header-height)}
.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;color:var(--text);font-weight:700}
.brand:hover{color:var(--primary)}
.brand svg{width:40px;height:40px;border-radius:10px;box-shadow:var(--shadow-sm);transition:var(--transition)}
.brand:hover svg{transform:rotate(-6deg) scale(1.05);box-shadow:var(--shadow-glow)}
.brand-text{font-size:1.15rem;letter-spacing:.02em;white-space:nowrap}
.main-nav{flex:1;display:flex;justify-content:center}
.main-nav ul{display:flex;gap:4px;flex-wrap:wrap;justify-content:center}
.main-nav a{display:block;padding:8px 14px;border-radius:var(--radius-full);font-size:.9rem;font-weight:500;color:var(--text-secondary);white-space:nowrap;position:relative;transition:var(--transition)}
.main-nav a::after{content:'';position:absolute;bottom:4px;left:50%;width:0;height:2px;background:linear-gradient(90deg,var(--accent),var(--pink));border-radius:2px;transform:translateX(-50%);transition:width .3s ease}
.main-nav a:hover{color:var(--primary);background:rgba(74,158,255,.08)}
.main-nav a:hover::after{width:60%}
.header-tools{display:flex;align-items:center;gap:10px;flex-shrink:0}
.site-search{display:flex;align-items:center;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-full);overflow:hidden;transition:var(--transition)}
.site-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
.site-search input{border:none;outline:none;background:transparent;padding:8px 14px;width:180px;color:var(--text);font-size:.875rem}
.site-search input::placeholder{color:var(--text-muted)}
.site-search button{padding:8px 16px;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;font-size:.85rem;font-weight:600;border-radius:var(--radius-full);transition:var(--transition)}
.site-search button:hover{background:linear-gradient(135deg,var(--primary-light),var(--accent));box-shadow:var(--shadow-glow)}
#theme-toggle,#menu-toggle{padding:8px 16px;border-radius:var(--radius-full);font-size:.85rem;font-weight:600;background:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary);transition:var(--transition);white-space:nowrap}
#theme-toggle:hover,#menu-toggle:hover{border-color:var(--accent);color:var(--accent);box-shadow:var(--shadow-sm);transform:translateY(-1px)}
#menu-toggle{display:none}
.hero{position:relative;padding:80px 24px 100px;overflow:hidden;background:linear-gradient(135deg,#0f2440 0%,#1a3a5c 30%,#2d5a8c 60%,#4a9eff 100%);background-size:200% 200%;animation:gradientShift 12s ease infinite}
@keyframes gradientShift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(255,107,157,.25) 0%,transparent 70%);border-radius:50%;animation:float 8s ease-in-out infinite}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(6,182,212,.2) 0%,transparent 70%);border-radius:50%;animation:float 10s ease-in-out infinite reverse}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(30px,-30px) scale(1.1)}}
.hero-slides{position:relative;max-width:var(--max-width);margin:0 auto;min-height:360px}
.hero-slide{position:absolute;top:0;left:0;width:100%;opacity:0;visibility:hidden;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease,visibility .7s;color:#fff}
.hero-slide.is-active{position:relative;opacity:1;visibility:visible;transform:translateY(0)}
.hero-slide h1,.hero-slide h2{font-size:clamp(1.75rem,4vw,2.75rem);line-height:1.3;margin-bottom:24px;font-weight:800;letter-spacing:-.02em;text-shadow:0 2px 20px rgba(0,0,0,.2);background:linear-gradient(135deg,#fff 0%,#c8e0ff 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-lead{font-size:clamp(.95rem,1.6vw,1.1rem);line-height:1.9;color:rgba(255,255,255,.88);margin-bottom:18px;max-width:900px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-top:32px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 32px;border-radius:var(--radius-full);font-weight:700;font-size:.95rem;letter-spacing:.02em;transition:var(--transition);position:relative;overflow:hidden}
.btn::before{content:'';position:absolute;top:50%;left:50%;width:0;height:0;background:rgba(255,255,255,.25);border-radius:50%;transform:translate(-50%,-50%);transition:width .5s,height .5s}
.btn:hover::before{width:300px;height:300px}
.btn-primary{background:linear-gradient(135deg,#fff 0%,#d0e4ff 100%);color:var(--primary-dark);box-shadow:0 8px 24px rgba(0,0,0,.2)}
.btn-primary:hover{color:var(--primary-dark);transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,0,0,.3)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.4);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.btn-ghost:hover{background:rgba(255,255,255,.22);color:#fff;border-color:#fff;transform:translateY(-3px)}
.hero-dots{display:flex;gap:12px;justify-content:center;margin-top:48px;position:relative;z-index:2}
.hero-dots button{width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.15);color:#fff;font-weight:700;font-size:.9rem;border:1.5px solid rgba(255,255,255,.3);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:var(--transition)}
.hero-dots button[aria-selected="true"]{background:linear-gradient(135deg,#fff,#d0e4ff);color:var(--primary-dark);border-color:#fff;box-shadow:0 4px 16px rgba(255,255,255,.4);transform:scale(1.1)}
.hero-dots button:hover:not([aria-selected="true"]){background:rgba(255,255,255,.3);transform:scale(1.08)}
.breadcrumb{max-width:var(--max-width);margin:0 auto;padding:20px 24px 0}
.breadcrumb ol{display:flex;gap:8px;flex-wrap:wrap;font-size:.85rem;color:var(--text-muted)}
.breadcrumb li+li::before{content:'/';margin-right:8px;color:var(--text-muted);opacity:.5}
.breadcrumb a{color:var(--text-secondary);font-weight:500}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb [aria-current="page"]{color:var(--text);font-weight:600}
.anchor-nav{position:sticky;top:var(--header-height);z-index:900;background:var(--bg-glass);backdrop-filter:blur(16px) saturate(180%);-webkit-backdrop-filter:blur(16px) saturate(180%);border-bottom:1px solid var(--bg-glass-border);margin-top:16px}
.anchor-nav ul{max-width:var(--max-width);margin:0 auto;padding:12px 24px;display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.anchor-nav ul::-webkit-scrollbar{display:none}
.anchor-nav a{display:block;padding:7px 16px;border-radius:var(--radius-full);font-size:.82rem;font-weight:600;color:var(--text-secondary);background:var(--bg-card);border:1px solid var(--border);white-space:nowrap;transition:var(--transition)}
.anchor-nav a:hover{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border-color:transparent;transform:translateY(-2px);box-shadow:var(--shadow-glow)}
.section{max-width:var(--max-width);margin:0 auto;padding:64px 24px;animation:fadeInUp .8s ease both}
@keyframes fadeInUp{from{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}
.section h2{font-size:clamp(1.4rem,3vw,2rem);font-weight:800;color:var(--text);margin-bottom:24px;position:relative;padding-bottom:16px;letter-spacing:-.01em}
.section h2::after{content:'';position:absolute;bottom:0;left:0;width:64px;height:4px;background:linear-gradient(90deg,var(--accent),var(--pink),var(--purple));border-radius:4px}
.section h3{font-size:clamp(1.1rem,2vw,1.35rem);font-weight:700;color:var(--text);margin:32px 0 14px;padding-left:16px;border-left:4px solid var(--accent);line-height:1.4}
.section p{color:var(--text-secondary);margin-bottom:16px;line-height:1.9}
.section ul,.section ol{margin:16px 0 24px;padding-left:8px}
.section ul li,.section ol li{color:var(--text-secondary);margin-bottom:10px;padding-left:28px;position:relative;line-height:1.8}
.section ul li::before{content:'';position:absolute;left:8px;top:12px;width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--purple));box-shadow:0 0 8px var(--accent-glow)}
.section ol{counter-reset:item}
.section ol li{counter-increment:item}
.section ol li::before{content:counter(item);position:absolute;left:0;top:4px;width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;font-size:.75rem;font-weight:700;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm)}
.section p a{font-weight:600;border-bottom:1px dashed var(--accent);padding-bottom:1px}
.section p a:hover{border-bottom-style:solid;color:var(--primary-light)}
.post-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;margin-bottom:20px;transition:var(--transition);position:relative;overflow:hidden;box-shadow:var(--shadow-sm)}
.post-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:linear-gradient(180deg,var(--accent),var(--pink),var(--purple));transform:scaleY(0);transform-origin:top;transition:transform .4s ease}
.post-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.post-card:hover::before{transform:scaleY(1)}
.post-card h3{margin-top:0;border-left:none;padding-left:0;font-size:1.15rem;transition:var(--transition)}
.post-card:hover h3{color:var(--accent)}
.post-meta{font-size:.82rem;color:var(--text-muted);margin-bottom:12px;font-weight:600;letter-spacing:.02em}
.post-summary{font-size:.95rem;color:var(--text-secondary);margin-bottom:16px;line-height:1.85}
.post-link{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:.9rem;color:var(--accent);padding:8px 20px;border-radius:var(--radius-full);background:rgba(74,158,255,.1);transition:var(--transition)}
.post-link::after{content:'→';transition:transform .3s ease}
.post-link:hover{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;box-shadow:var(--shadow-glow)}
.post-link:hover::after{transform:translateX(4px)}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:14px;overflow:hidden;transition:var(--transition);box-shadow:var(--shadow-sm)}
.faq-item:hover{border-color:var(--accent);box-shadow:var(--shadow-md)}
.faq-item[open]{border-color:var(--accent);box-shadow:var(--shadow-md)}
.faq-item summary{padding:20px 24px;font-weight:700;font-size:1rem;color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;list-style:none;transition:var(--transition);position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';flex-shrink:0;width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;font-size:1.2rem;font-weight:300;display:flex;align-items:center;justify-content:center;transition:var(--transition);line-height:1}
.faq-item[open] summary::after{content:'−';transform:rotate(180deg);background:linear-gradient(135deg,var(--pink),var(--purple))}
.faq-item summary:hover{background:rgba(74,158,255,.06);color:var(--accent)}
.faq-answer{padding:0 24px 22px;color:var(--text-secondary);line-height:1.9;font-size:.95rem;animation:slideDown .4s ease}
@keyframes slideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
.faq-answer p{margin-bottom:0}
#back-to-top{position:fixed;bottom:32px;right:32px;z-index:999;width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;font-size:.75rem;font-weight:700;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(20px) scale(.8);transition:var(--transition);display:flex;align-items:center;justify-content:center;text-align:center;line-height:1.2;padding:4px}
#back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0) scale(1)}
#back-to-top:hover{background:linear-gradient(135deg,var(--accent),var(--pink));box-shadow:var(--shadow-glow);transform:translateY(-4px) scale(1.08)}
#site-footer{background:linear-gradient(160deg,var(--primary-dark) 0%,var(--primary) 50%,var(--primary-light) 100%);color:rgba(255,255,255,.85);margin-top:64px;position:relative;overflow:hidden}
#site-footer::before{content:'';position:absolute;top:-100px;right:-100px;width:400px;height:400px;background:radial-gradient(circle,rgba(74,158,255,.15) 0%,transparent 70%);border-radius:50%}
.footer-inner{max-width:var(--max-width);margin:0 auto;padding:64px 24px 40px;display:grid;grid-template-columns:1.4fr 1fr 1.4fr 1fr;gap:40px;position:relative;z-index:1}
.footer-col h3,.footer-col h4{color:#fff;font-size:1.05rem;font-weight:700;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-col h3::after,.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:36px;height:3px;background:linear-gradient(90deg,var(--accent),var(--pink));border-radius:3px}
.footer-col p{font-size:.88rem;line-height:1.8;color:rgba(255,255,255,.75);margin-bottom:0}
.footer-col ul li{margin-bottom:10px;font-size:.88rem;color:rgba(255,255,255,.75);line-height:1.7}
.footer-col ul li a{color:rgba(255,255,255,.75);transition:var(--transition);display:inline-block}
.footer-col ul li a:hover{color:#fff;transform:translateX(4px);text-shadow:0 0 12px rgba(255,255,255,.5)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.15);padding:24px;text-align:center;position:relative;z-index:1}
.footer-bottom p{font-size:.82rem;color:rgba(255,255,255,.65);margin-bottom:6px;line-height:1.7}
.footer-bottom p:last-child{margin-bottom:0}
@media (max-width:1024px){.footer-inner{grid-template-columns:1fr 1fr;gap:32px}
.main-nav a{padding:8px 10px;font-size:.85rem}
.site-search input{width:140px}}
@media (max-width:860px){:root{--header-height:64px}
.header-inner{padding:0 16px;gap:12px}
.brand-text{font-size:1rem}
.main-nav{position:fixed;top:var(--header-height);left:0;width:100%;background:var(--bg-glass);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--bg-glass-border);padding:16px;transform:translateY(-120%);opacity:0;visibility:hidden;transition:var(--transition);max-height:calc(100vh - var(--header-height));overflow-y:auto;z-index:999}
.main-nav.is-open{transform:translateY(0);opacity:1;visibility:visible}
.main-nav ul{flex-direction:column;gap:4px}
.main-nav a{padding:12px 18px;border-radius:var(--radius-md);font-size:.95rem;text-align:left}
.main-nav a::after{display:none}
#menu-toggle{display:block}
.site-search{display:none}
.hero{padding:56px 16px 72px}
.hero-slides{min-height:auto}
.hero-slide{position:relative;display:none}
.hero-slide.is-active{display:block}
.hero-actions{flex-direction:column;gap:12px}
.btn{width:100%;padding:14px 24px}
.section{padding:44px 16px}
.post-card{padding:22px}
.faq-item summary{padding:16px 18px;font-size:.95rem}
.faq-answer{padding:0 18px 18px}
#back-to-top{bottom:20px;right:20px;width:46px;height:46px;font-size:.7rem}
.footer-inner{grid-template-columns:1fr;gap:32px;padding:44px 16px 32px}}
@media (max-width:480px){.hero-slide h1,.hero-slide h2{font-size:1.5rem}
.hero-lead{font-size:.9rem}
.brand-text{display:none}
.anchor-nav ul{padding:10px 12px}
.anchor-nav a{padding:6px 12px;font-size:.78rem}
.section h2{font-size:1.3rem}
.section h3{font-size:1.05rem}
.post-card{padding:18px}
.post-card h3{font-size:1.05rem}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}}
@media print{#site-header,.anchor-nav,#back-to-top,.hero-dots,.hero-actions{display:none}
body{background:#fff;color:#000}
.section{page-break-inside:avoid}}