*{margin:0;padding:0;box-sizing:border-box}
:root{
  --brand:#e63946;
  --brand-2:#ff6b6b;
  --brand-soft:#fde8ea;
  --bg:#f7f7f9;
  --bg-2:#ffffff;
  --bg-3:#f0f0f4;
  --text:#1a1a1a;
  --text-2:#666666;
  --text-3:#888888;
  --line:#eeeeee;
  --shadow:0 2px 12px rgba(0,0,0,.06);
  --shadow-hover:0 12px 32px rgba(230,57,70,.16);
  --glass:rgba(255,255,255,.72);
  --glass-line:rgba(255,255,255,.55);
  --radius:16px;
  --radius-sm:12px;
  --header-h:64px;
}
body.dark{
  --brand:#ff5a67;
  --brand-2:#ff8a8a;
  --brand-soft:#3a1a1e;
  --bg:#101014;
  --bg-2:#1a1a1f;
  --bg-3:#26262c;
  --text:#e8e8ea;
  --text-2:#a9a9b2;
  --text-3:#8a8a93;
  --line:#2c2c33;
  --shadow:0 2px 12px rgba(0,0,0,.45);
  --shadow-hover:0 12px 32px rgba(0,0,0,.6);
  --glass:rgba(26,26,31,.72);
  --glass-line:rgba(255,255,255,.08);
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  transition:background .35s ease,color .35s ease;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
button{font-family:inherit}
::selection{background:var(--brand);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(230,57,70,.35);border-radius:8px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:rgba(230,57,70,.6);background-clip:content-box}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.header{
  position:sticky;top:0;z-index:1000;
  background:var(--glass);
  backdrop-filter:saturate(180%) blur(18px);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid var(--glass-line);
  box-shadow:0 2px 20px rgba(0,0,0,.05);
  transition:background .35s ease,box-shadow .35s ease;
}
body.dark .header{box-shadow:0 2px 20px rgba(0,0,0,.5)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);gap:16px}
.logo{
  font-size:22px;font-weight:800;letter-spacing:-.5px;
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:var(--brand);
  white-space:nowrap;transition:transform .25s ease;
}
.logo:hover{transform:scale(1.04)}
.logo span{
  background:none;-webkit-text-fill-color:var(--text);color:var(--text);
}
.nav{display:flex;gap:22px;align-items:center}
.nav a{
  font-size:14px;color:var(--text-2);font-weight:500;position:relative;
  padding:4px 0;transition:color .25s ease;
}
.nav a::after{
  content:"";position:absolute;left:50%;bottom:-2px;width:0;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  border-radius:2px;transform:translateX(-50%);
  transition:width .3s cubic-bezier(.4,0,.2,1);
}
.nav a:hover{color:var(--brand);text-decoration:none}
.nav a:hover::after{width:100%}
.search-box{
  display:flex;align-items:center;background:var(--bg-3);
  border-radius:22px;padding:5px 6px 5px 14px;gap:6px;
  border:1px solid transparent;transition:border-color .25s ease,box-shadow .25s ease,background .35s ease;
}
.search-box:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(230,57,70,.12);
}
.search-box input{
  border:none;background:transparent;outline:none;font-size:13px;
  width:120px;color:var(--text);transition:width .3s ease;
}
.search-box input::placeholder{color:var(--text-3)}
.search-box input:focus{width:160px}
.search-box button{
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  color:#fff;border:none;border-radius:16px;padding:5px 14px;
  font-size:12px;cursor:pointer;font-weight:600;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.search-box button:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(230,57,70,.35);filter:brightness(1.05)}
.search-box button:active{transform:translateY(0)}
.theme-toggle{
  background:var(--bg-3);border:1px solid var(--line);border-radius:50%;
  width:36px;height:36px;cursor:pointer;font-size:15px;line-height:1;
  display:flex;align-items:center;justify-content:center;
  transition:transform .3s ease,background .35s ease,border-color .35s ease,box-shadow .25s ease;
}
.theme-toggle:hover{transform:rotate(20deg) scale(1.08);box-shadow:0 4px 14px rgba(230,57,70,.25)}
.mobile-menu-btn{
  display:none;background:var(--bg-3);border:1px solid var(--line);
  border-radius:10px;font-size:20px;cursor:pointer;color:var(--text);
  width:38px;height:38px;line-height:1;align-items:center;justify-content:center;
  transition:background .25s ease,transform .2s ease;
}
.mobile-menu-btn:hover{transform:scale(1.06)}
.breadcrumb{
  font-size:13px;color:var(--text-3);margin:18px 0 4px;
  display:flex;gap:6px;flex-wrap:wrap;align-items:center;
}
.breadcrumb a{color:var(--brand);font-weight:500}
.breadcrumb a:hover{text-decoration:underline}
.banner{
  position:relative;overflow:hidden;border-radius:22px;
  margin:22px 0 8px;
  background:
    radial-gradient(120% 140% at 12% 8%,rgba(255,255,255,.28) 0%,transparent 45%),
    radial-gradient(120% 120% at 88% 92%,rgba(255,214,214,.35) 0%,transparent 50%),
    linear-gradient(135deg,#e63946 0%,#ff5f6d 45%,#ff8a5c 100%);
  min-height:300px;display:flex;align-items:center;justify-content:center;
  color:#fff;text-align:center;padding:56px 24px;
  box-shadow:0 18px 48px rgba(230,57,70,.28);
  isolation:isolate;
}
.banner::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(circle at 20% 30%,rgba(255,255,255,.22) 0,rgba(255,255,255,0) 28%),
    radial-gradient(circle at 78% 70%,rgba(255,255,255,.16) 0,rgba(255,255,255,0) 30%);
  animation:bannerFloat 12s ease-in-out infinite alternate;
}
.banner::after{
  content:"";position:absolute;inset:0;z-index:-1;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.35) 1px,transparent 1px);
  background-size:26px 26px;
  mask-image:radial-gradient(120% 120% at 50% 0%,#000 0%,transparent 70%);
  -webkit-mask-image:radial-gradient(120% 120% at 50% 0%,#000 0%,transparent 70%);
}
@keyframes bannerFloat{
  from{transform:translate3d(-2%,-1%,0) scale(1)}
  to{transform:translate3d(2%,2%,0) scale(1.06)}
}
.banner-slide{display:none;animation:fade .7s cubic-bezier(.22,1,.36,1);max-width:760px}
.banner-slide.active{display:block}
@keyframes fade{
  from{opacity:0;transform:translateY(14px) scale(.99)}
  to{opacity:1;transform:translateY(0) scale(1)}
}
.banner h1{
  font-size:34px;margin-bottom:14px;font-weight:800;
  line-height:1.35;letter-spacing:-.5px;
  text-shadow:0 4px 22px rgba(0,0,0,.18);
}
.banner h2{
  font-size:28px;margin-bottom:12px;font-weight:800;
  line-height:1.35;text-shadow:0 4px 22px rgba(0,0,0,.18);
}
.banner p{
  font-size:16px;opacity:.96;max-width:620px;margin:0 auto;
  line-height:1.85;text-shadow:0 2px 12px rgba(0,0,0,.14);
}
.section{margin:56px 0;scroll-margin-top:84px}
.section-title{
  font-size:24px;font-weight:800;margin-bottom:8px;
  position:relative;display:inline-block;letter-spacing:-.3px;
}
.section-title::after{
  content:"";position:absolute;left:0;bottom:-8px;width:52px;height:4px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  border-radius:3px;
  transition:width .4s cubic-bezier(.4,0,.2,1);
}
.section:hover .section-title::after{width:88px}
.section-sub{color:var(--text-3);font-size:14px;margin-bottom:26px;margin-top:14px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{
  position:relative;background:var(--bg-2);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);
  border:1px solid var(--glass-line);
  transition:transform .3s cubic-bezier(.22,1,.36,1),box-shadow .3s ease,border-color .3s ease,background .35s ease;
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;
  transition:transform .4s cubic-bezier(.4,0,.2,1);
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(230,57,70,.28);
}
.card:hover::before{transform:scaleX(1)}
.card h3{
  font-size:17px;margin-bottom:10px;
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:var(--brand);
  font-weight:700;
}
.card p{font-size:14px;color:var(--text-2);line-height:1.85}
.stat-row{
  display:flex;gap:32px;flex-wrap:wrap;justify-content:center;margin:36px 0;
  padding:36px 24px;border-radius:22px;
  background:linear-gradient(135deg,rgba(230,57,70,.08),rgba(255,107,107,.05));
  border:1px solid var(--glass-line);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.stat-item{
  text-align:center;min-width:120px;
  transition:transform .3s ease;
}
.stat-item:hover{transform:translateY(-4px)}
.stat-num{
  font-size:38px;font-weight:800;line-height:1.2;
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:var(--brand);
  font-variant-numeric:tabular-nums;
}
.stat-label{font-size:13px;color:var(--text-3);margin-top:6px;letter-spacing:.3px}
.faq-item{
  border-bottom:1px solid var(--line);padding:18px 0;
  transition:border-color .3s ease;
}
.faq-item:last-child{border-bottom:none}
.faq-q{
  font-size:15px;font-weight:600;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  transition:color .25s ease;user-select:none;
}
.faq-q:hover{color:var(--brand)}
.faq-q::after{
  content:"+";font-size:22px;line-height:1;color:var(--brand);
  transition:transform .35s cubic-bezier(.4,0,.2,1);flex-shrink:0;
  font-weight:400;
}
.faq-item.open .faq-q{color:var(--brand)}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .4s cubic-bezier(.4,0,.2,1),padding .35s ease,opacity .35s ease;
  font-size:14px;color:var(--text-2);line-height:1.85;opacity:0;
}
.faq-item.open .faq-a{max-height:520px;padding-top:12px;opacity:1}
.article-card{
  background:var(--bg-2);border-radius:var(--radius-sm);padding:22px;
  box-shadow:var(--shadow);border:1px solid var(--glass-line);
  transition:transform .3s cubic-bezier(.22,1,.36,1),box-shadow .3s ease,border-color .3s ease,background .35s ease;
  display:flex;flex-direction:column;
}
.article-card:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(230,57,70,.28);
}
.article-card h4{
  font-size:15px;margin-bottom:8px;color:var(--text);
  line-height:1.55;font-weight:700;
  transition:color .25s ease;
}
.article-card:hover h4{color:var(--brand)}
.article-meta{font-size:12px;color:var(--text-3);margin-bottom:10px;letter-spacing:.2px}
.article-card p{font-size:13px;color:var(--text-2);line-height:1.8;margin-bottom:14px;flex:1}
.read-more{
  font-size:13px;font-weight:600;color:var(--brand);
  display:inline-flex;align-items:center;gap:4px;
  transition:gap .25s ease,color .25s ease;
}
.read-more:hover{gap:8px;text-decoration:none}
.howto-step{
  display:flex;gap:16px;margin-bottom:22px;align-items:flex-start;
  padding:18px 20px;border-radius:var(--radius-sm);
  background:var(--bg-2);border:1px solid var(--glass-line);
  box-shadow:var(--shadow);
  transition:transform .3s cubic-bezier(.22,1,.36,1),box-shadow .3s ease,border-color .3s ease,background .35s ease;
}
.howto-step:hover{
  transform:translateX(6px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(230,57,70,.28);
}
.step-num{
  width:34px;height:34px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:14px;flex-shrink:0;
  box-shadow:0 6px 16px rgba(230,57,70,.32);
  transition:transform .3s ease;
}
.howto-step:hover .step-num{transform:rotate(-8deg) scale(1.08)}
.step-content h4{font-size:15px;margin-bottom:5px;font-weight:700}
.step-content p{font-size:13px;color:var(--text-2);line-height:1.8}
.tag{
  display:inline-block;background:var(--brand-soft);color:var(--brand);
  font-size:12px;padding:3px 11px;border-radius:11px;
  margin-right:6px;margin-bottom:6px;font-weight:500;
  transition:transform .2s ease,background .3s ease;
}
.tag:hover{transform:translateY(-2px)}
.contact-item{
  display:flex;gap:10px;margin-bottom:12px;font-size:14px;align-items:flex-start;
  line-height:1.75;
}
.contact-item strong{min-width:76px;color:var(--text);flex-shrink:0;font-weight:600}
.contact-item span{color:var(--text-2);word-break:break-all}
.footer{
  background:linear-gradient(180deg,#1a1a1a 0%,#141414 100%);
  color:#aaa;padding:56px 0 26px;margin-top:72px;font-size:13px;
  border-top:1px solid rgba(255,255,255,.06);
  transition:background .35s ease;
}
body.dark .footer{background:linear-gradient(180deg,#0a0a0c 0%,#050506 100%)}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px;
}
.footer h4{
  color:#fff;font-size:15px;margin-bottom:14px;font-weight:700;
  position:relative;display:inline-block;
}
.footer h4::after{
  content:"";position:absolute;left:0;bottom:-6px;width:24px;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));border-radius:2px;
}
.footer a{
  color:#999;display:block;margin-bottom:8px;font-size:13px;
  transition:color .25s ease,transform .25s ease,padding-left .25s ease;
}
.footer a:hover{color:var(--brand);text-decoration:none;transform:translateX(4px)}
.footer p{color:#8a8a8a;line-height:1.9}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding-top:22px;
  text-align:center;color:#6a6a6a;font-size:12px;line-height:1.9;
}
.footer-bottom p{margin-bottom:4px}
.back-top{
  position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;border:none;font-size:20px;cursor:pointer;
  box-shadow:0 8px 24px rgba(230,57,70,.42);
  opacity:0;visibility:hidden;transform:translateY(14px) scale(.9);
  transition:opacity .35s ease,visibility .35s ease,transform .35s cubic-bezier(.22,1,.36,1),box-shadow .3s ease;
  z-index:999;display:flex;align-items:center;justify-content:center;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0) scale(1)}
.back-top:hover{transform:translateY(-4px) scale(1.08);box-shadow:0 14px 32px rgba(230,57,70,.55)}
.back-top:active{transform:translateY(-2px) scale(1.02)}
.fade-up{
  opacity:0;transform:translateY(24px);
  transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1);
  will-change:opacity,transform;
}
.fade-up.visible{opacity:1;transform:translateY(0)}
@media(max-width:1024px){
  .nav{gap:16px}
  .nav a{font-size:13px}
  .search-box input{width:96px}
  .search-box input:focus{width:120px}
}
@media(max-width:900px){
  .grid-3{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .banner h1{font-size:28px}
  .banner h2{font-size:24px}
}
@media(max-width:768px){
  .search-box{display:none}
  .nav{
    display:none;position:absolute;top:var(--header-h);left:0;right:0;
    background:var(--glass);backdrop-filter:saturate(180%) blur(18px);
    -webkit-backdrop-filter:saturate(180%) blur(18px);
    flex-direction:column;padding:18px 24px;gap:14px;
    box-shadow:0 12px 32px rgba(0,0,0,.12);
    border-bottom:1px solid var(--glass-line);
    animation:fade .3s ease;
  }
  body.dark .nav{box-shadow:0 12px 32px rgba(0,0,0,.5)}
  .nav.open{display:flex}
  .nav a{width:100%;padding:8px 0;font-size:15px;border-bottom:1px solid var(--line)}
  .nav a:last-child{border-bottom:none}
  .nav a::after{display:none}
  .mobile-menu-btn{display:flex}
  .banner{min-height:240px;padding:40px 20px;border-radius:18px}
  .banner h1{font-size:22px}
  .banner h2{font-size:20px}
  .banner p{font-size:14px}
  .section{margin:44px 0}
  .section-title{font-size:21px}
}
@media(max-width:640px){
  .container{padding:0 16px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .stat-row{gap:22px;padding:26px 16px}
  .stat-item{min-width:44%}
  .stat-num{font-size:30px}
  .card{padding:20px}
  .howto-step{padding:16px}
  .back-top{right:16px;bottom:16px;width:42px;height:42px;font-size:18px}
  .breadcrumb{font-size:12px}
}
@media(max-width:380px){
  .stat-item{min-width:100%}
  .banner h1{font-size:20px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .fade-up{opacity:1;transform:none}
}
@media print{
  .header,.back-top,.footer,.banner{display:none}
  body{background:#fff;color:#000}
}