:root{--bg:#f8f5f0;--bg-alt:#f0ebe3;--surface:#ffffff;--surface-2:#faf7f2;--border:#ece6dd;--border-strong:#ddd6cc;--text:#2d2a24;--text-soft:#3d3a34;--text-muted:#8a847a;--heading:#1a2b3c;--heading-2:#2c3e50;--accent:#f5c542;--accent-soft:#f5e6d3;--nav-bg:rgba(26,43,60,.96);--nav-text:#e8e0d5;--footer-bg:#1a2b3c;--footer-text:#b8b0a4;--hero-from:#1a2b3c;--hero-to:#2c3e50;--shadow:0 4px 16px rgba(0,0,0,.04);--shadow-lg:0 12px 32px rgba(26,43,60,.12);--radius:14px;--radius-sm:10px;--radius-pill:40px;--glass:rgba(255,255,255,.72);--glass-border:rgba(255,255,255,.4);--ring:rgba(245,197,66,.45);--ease:cubic-bezier(.22,.61,.36,1)}
@media (prefers-color-scheme:dark){:root{--bg:#0f161e;--bg-alt:#141d27;--surface:#18222e;--surface-2:#1b2632;--border:#26333f;--border-strong:#33424f;--text:#e6e2da;--text-soft:#cfc9bf;--text-muted:#8f9aa6;--heading:#f2ede4;--heading-2:#d9e2ea;--accent:#f5c542;--accent-soft:#3a3320;--nav-bg:rgba(12,18,25,.92);--nav-text:#d9d2c6;--footer-bg:#0b1118;--footer-text:#9aa4ae;--hero-from:#0d1720;--hero-to:#1b2b3a;--shadow:0 4px 16px rgba(0,0,0,.35);--shadow-lg:0 12px 32px rgba(0,0,0,.5);--glass:rgba(24,34,46,.66);--glass-border:rgba(255,255,255,.08);--ring:rgba(245,197,66,.4)}}
html[data-theme="dark"]{--bg:#0f161e;--bg-alt:#141d27;--surface:#18222e;--surface-2:#1b2632;--border:#26333f;--border-strong:#33424f;--text:#e6e2da;--text-soft:#cfc9bf;--text-muted:#8f9aa6;--heading:#f2ede4;--heading-2:#d9e2ea;--accent:#f5c542;--accent-soft:#3a3320;--nav-bg:rgba(12,18,25,.92);--nav-text:#d9d2c6;--footer-bg:#0b1118;--footer-text:#9aa4ae;--hero-from:#0d1720;--hero-to:#1b2b3a;--shadow:0 4px 16px rgba(0,0,0,.35);--shadow-lg:0 12px 32px rgba(0,0,0,.5);--glass:rgba(24,34,46,.66);--glass-border:rgba(255,255,255,.08);--ring:rgba(245,197,66,.4)}
html[data-theme="light"]{--bg:#f8f5f0;--bg-alt:#f0ebe3;--surface:#ffffff;--surface-2:#faf7f2;--border:#ece6dd;--border-strong:#ddd6cc;--text:#2d2a24;--text-soft:#3d3a34;--text-muted:#8a847a;--heading:#1a2b3c;--heading-2:#2c3e50;--accent:#f5c542;--accent-soft:#f5e6d3;--nav-bg:rgba(26,43,60,.96);--nav-text:#e8e0d5;--footer-bg:#1a2b3c;--footer-text:#b8b0a4;--hero-from:#1a2b3c;--hero-to:#2c3e50;--shadow:0 4px 16px rgba(0,0,0,.04);--shadow-lg:0 12px 32px rgba(26,43,60,.12);--glass:rgba(255,255,255,.72);--glass-border:rgba(255,255,255,.4);--ring:rgba(245,197,66,.45)}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;background:var(--bg);color:var(--text);line-height:1.75;font-size:16px;overflow-x:hidden;transition:background-color .4s var(--ease),color .4s var(--ease)}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;background:radial-gradient(1200px 600px at 12% -8%,rgba(245,197,66,.10),transparent 60%),radial-gradient(900px 500px at 88% 4%,rgba(44,62,80,.10),transparent 62%)}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--heading-2);text-decoration:none;transition:color .25s var(--ease),opacity .25s var(--ease)}
a:hover{color:var(--accent)}
ul{list-style:none}
h1,h2,h3,h4{line-height:1.3;font-weight:400;letter-spacing:.02em}
h1{font-size:clamp(1.7rem,4.4vw,2.8rem)}
h2{font-size:clamp(1.45rem,3.2vw,2rem);color:var(--heading);margin-bottom:32px;padding-left:20px;border-left:6px solid var(--accent);position:relative}
h2::after{content:"";position:absolute;left:20px;bottom:-12px;width:64px;height:2px;background:linear-gradient(90deg,var(--accent),transparent);opacity:.7}
h3{font-size:clamp(1.15rem,2.2vw,1.35rem);margin:28px 0 12px;color:var(--heading-2)}
h4{font-size:1.1rem;margin:20px 0 8px;color:var(--heading-2)}
p{margin-bottom:16px;color:var(--text-soft)}
strong{color:var(--heading);font-weight:600}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
header{position:sticky;top:0;z-index:100;background:var(--nav-bg);backdrop-filter:blur(14px) saturate(160%);-webkit-backdrop-filter:blur(14px) saturate(160%);color:#fff;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.06);transition:background-color .4s var(--ease),box-shadow .3s var(--ease)}
header.scrolled{box-shadow:0 8px 28px rgba(0,0,0,.22)}
nav{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.logo{font-size:1.6rem;font-weight:700;letter-spacing:3px;color:var(--accent-soft);position:relative;white-space:nowrap}
.logo::after{content:"";position:absolute;left:0;bottom:-4px;width:100%;height:2px;background:linear-gradient(90deg,var(--accent),transparent);transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease)}
.logo:hover::after{transform:scaleX(1)}
.nav-links{display:flex;gap:26px;list-style:none;font-size:.95rem;align-items:center}
.nav-links a{color:var(--nav-text);position:relative;padding:6px 2px;display:inline-block}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:right;transition:transform .3s var(--ease)}
.nav-links a:hover{color:var(--accent)}
.nav-links a:hover::after{transform:scaleX(1);transform-origin:left}
.mobile-menu-btn{display:none;font-size:1.8rem;cursor:pointer;color:var(--accent-soft);line-height:1;padding:4px 8px;border-radius:8px;transition:background-color .25s var(--ease),transform .25s var(--ease)}
.mobile-menu-btn:hover{background:rgba(255,255,255,.08);transform:scale(1.06)}
.breadcrumb{font-size:.9rem;color:var(--text-muted);padding:14px 20px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.breadcrumb a{color:var(--heading-2);position:relative}
.breadcrumb a:hover{color:var(--accent)}
.hero{border-bottom:none!important;background:linear-gradient(135deg,var(--hero-from) 0%,var(--hero-to) 55%,#3a5068 100%);background-size:200% 200%;animation:heroShift 16s ease-in-out infinite;color:#fff;padding:88px 0 68px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 20% 10%,rgba(245,197,66,.16),transparent 65%),radial-gradient(700px 340px at 82% 88%,rgba(255,255,255,.08),transparent 60%);pointer-events:none}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(245,197,66,.5),transparent)}
@keyframes heroShift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.hero .container{position:relative;z-index:2}
.hero h1{font-weight:400;letter-spacing:4px;margin-bottom:18px;text-shadow:0 2px 24px rgba(0,0,0,.28);animation:fadeUp .8s var(--ease) both}
.hero p{font-size:clamp(1rem,1.6vw,1.15rem);max-width:760px;margin:0 auto 26px;color:#d5cdc0;animation:fadeUp .8s .12s var(--ease) both}
.hero .btn{animation:fadeUp .8s .24s var(--ease) both}
.hero> .container> div{margin-top:32px;font-size:.9rem;color:#b8b0a4;animation:fadeUp .8s .36s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}
.btn{display:inline-block;padding:13px 34px;border-radius:var(--radius-pill);background:linear-gradient(135deg,#f7d15f,var(--accent) 55%,#e8b52e);color:#1a2b3c;font-weight:600;letter-spacing:1px;text-decoration:none;position:relative;overflow:hidden;box-shadow:0 8px 22px rgba(245,197,66,.28);transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease)}
.btn::before{content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.6),transparent);transform:skewX(-20deg);transition:left .6s var(--ease)}
.btn:hover{transform:translateY(-3px) scale(1.02);box-shadow:0 14px 32px rgba(245,197,66,.4);filter:brightness(1.03);color:#1a2b3c}
.btn:hover::before{left:130%}
.btn:active{transform:translateY(-1px) scale(.99)}
section{padding:64px 0;border-bottom:1px solid var(--border);position:relative;transition:border-color .4s var(--ease)}
section:last-of-type{border-bottom:none}
section.container{padding-left:20px;padding-right:20px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:var(--surface);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);border:1px solid var(--border);position:relative;overflow:hidden;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease),background-color .4s var(--ease)}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),#e8b52e,transparent);transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.card:hover::before{transform:scaleX(1)}
.card h3{margin-top:0}
.card h4{margin-top:0}
.article-item{border-bottom:1px dashed var(--border-strong);padding:22px 0;transition:padding-left .35s var(--ease),border-color .35s var(--ease)}
.article-item:last-child{border-bottom:none}
.article-item:hover{padding-left:14px;border-color:var(--accent)}
.article-item h3{margin-top:0;transition:color .3s var(--ease)}
.article-item:hover h3{color:var(--accent)}
.article-item a{font-weight:600;font-size:.92rem;display:inline-flex;align-items:center;gap:6px;transition:gap .3s var(--ease),color .3s var(--ease)}
.article-item a:hover{gap:12px;color:var(--accent)}
.meta{font-size:.85rem;color:var(--text-muted);margin-bottom:8px;letter-spacing:.02em}
.faq-item{border-bottom:1px solid var(--border);padding:16px 0;transition:background-color .3s var(--ease),border-color .4s var(--ease)}
.faq-item:last-child{border-bottom:none}
.faq-q{font-weight:600;font-size:1.1rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;color:var(--heading);padding:6px 10px;border-radius:var(--radius-sm);transition:background-color .3s var(--ease),color .3s var(--ease)}
.faq-q:hover{background:var(--bg-alt);color:var(--accent)}
.faq-q span:last-child{flex:0 0 auto;width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;background:var(--accent-soft);color:var(--heading);font-size:1.05rem;line-height:1;transition:transform .35s var(--ease),background-color .3s var(--ease),color .3s var(--ease)}
.faq-item:hover .faq-q span:last-child{background:var(--accent);color:#1a2b3c;transform:rotate(90deg)}
.faq-a{padding:12px 10px 0;color:var(--text-soft);display:block;animation:fadeUp .4s var(--ease) both}
.faq-item .faq-a[style*="none"]{display:none}
.footer{background:var(--footer-bg);color:var(--footer-text);padding:52px 0 26px;font-size:.9rem;position:relative;transition:background-color .4s var(--ease),color .4s var(--ease)}
.footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,transparent,var(--accent),transparent)}
.footer a{color:var(--accent-soft);text-decoration:none;position:relative;transition:color .25s var(--ease)}
.footer a:hover{color:var(--accent)}
.footer h4{color:var(--accent-soft)!important;margin-bottom:14px}
.footer p{color:var(--footer-text)}
.footer .grid-3{gap:28px}
.back-to-top{position:fixed;bottom:30px;right:30px;background:linear-gradient(135deg,#f7d15f,var(--accent));color:#1a2b3c;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;cursor:pointer;box-shadow:0 6px 18px rgba(0,0,0,.2);z-index:200;opacity:0;visibility:hidden;transform:translateY(16px) scale(.9);transition:opacity .35s var(--ease),transform .35s var(--ease),visibility .35s,box-shadow .3s var(--ease)}
.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0) scale(1)}
.back-to-top:hover{transform:translateY(-4px) scale(1.06);box-shadow:0 12px 28px rgba(245,197,66,.42)}
.search-box{display:flex;gap:8px;margin:20px 0;background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:var(--radius-pill);padding:6px;box-shadow:var(--shadow)}
.search-box input{padding:10px 18px;border:1px solid transparent;border-radius:var(--radius-pill);flex:1;font-size:1rem;background:var(--surface);color:var(--text);outline:none;transition:border-color .3s var(--ease),box-shadow .3s var(--ease),background-color .4s var(--ease)}
.search-box input::placeholder{color:var(--text-muted)}
.search-box input:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--ring)}
.search-box button{padding:10px 26px;border:none;background:linear-gradient(135deg,#2c3e50,var(--heading));color:#fff;border-radius:var(--radius-pill);cursor:pointer;font-size:.95rem;letter-spacing:.04em;transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease)}
.search-box button:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(26,43,60,.3);filter:brightness(1.12)}
.tag{display:inline-block;background:var(--bg-alt);padding:5px 14px;border-radius:20px;font-size:.85rem;margin:4px;color:var(--text-soft);border:1px solid var(--border);transition:background-color .3s var(--ease),color .3s var(--ease),transform .3s var(--ease),border-color .3s var(--ease)}
.tag:hover{background:var(--accent);color:#1a2b3c;border-color:var(--accent);transform:translateY(-2px)}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:.08s}
.reveal-delay-2{transition-delay:.16s}
.reveal-delay-3{transition-delay:.24s}
svg[role="img"]{border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .45s var(--ease),box-shadow .45s var(--ease)}
svg[role="img"]:hover{transform:translateY(-4px) scale(1.01);box-shadow:var(--shadow-lg)}
::selection{background:var(--accent);color:#1a2b3c}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-alt)}
::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:20px;border:2px solid var(--bg-alt)}
::-webkit-scrollbar-thumb:hover{background:var(--accent)}
@media (max-width:1024px){.grid-3{grid-template-columns:repeat(2,1fr)}.hero{padding:72px 0 56px}}
@media (max-width:768px){
    .grid-2,.grid-3{grid-template-columns:1fr}
    .hero h1{font-size:2rem;letter-spacing:2px}
    .hero{padding:60px 0 48px}
    .nav-links{display:none;width:100%;gap:14px;font-size:1rem}
    .nav-links.open{display:flex}
    .mobile-menu-btn{display:block}
    .logo{font-size:1.35rem}
    h2{margin-bottom:26px;padding-left:16px;border-left-width:5px}
    h2::after{left:16px}
    section{padding:48px 0}
    .card{padding:22px}
    .back-to-top{bottom:20px;right:20px;width:44px;height:44px;font-size:1.3rem}
    .search-box{flex-direction:column;border-radius:var(--radius)}
    .search-box input,.search-box button{width:100%}
}
@media (max-width:480px){
    .container{padding:0 16px}
    .hero h1{font-size:1.6rem}
    .hero> .container> div{font-size:.82rem}
    .btn{padding:12px 26px;font-size:.95rem}
    .article-item:hover{padding-left:8px}
}
@media (prefers-reduced-motion:reduce){
    *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
    .reveal{opacity:1;transform:none}
}
@media print{
    header,.back-to-top,.hero::before,.hero::after{display:none}
    body{background:#fff;color:#000}
    .card{box-shadow:none;border:1px solid #ccc}
}