/* 全局重置与基础 */
*,::after,::before{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,'Open Sans','Helvetica Neue',sans-serif;
  background:linear-gradient(135deg,#f5f7fa 0%,#e8ecf1 100%);
  color:#1a1a2e;
  line-height:1.6;
  transition:background .4s ease,color .4s ease;
  min-height:100vh;
}
body.dark{
  background:linear-gradient(135deg,#0a0a14 0%,#12121f 100%);
  color:#e0e0e0;
}
a{color:#e94560;text-decoration:none;transition:color .25s}
a:hover{text-decoration:underline;color:#ff6b81}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 头部导航 */
.header{
  background:rgba(26,26,46,0.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  color:#fff;
  position:sticky;
  top:0;
  z-index:1000;
  box-shadow:0 4px 20px rgba(0,0,0,.25);
  border-bottom:1px solid rgba(233,69,96,0.15);
}
.header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:15px 20px;
}
.logo{
  font-size:1.8rem;
  font-weight:700;
  color:#fff;
  display:flex;
  align-items:center;
  gap:10px;
  text-shadow:0 2px 8px rgba(0,0,0,0.3);
}
.logo span{color:#e94560}
.nav{
  display:flex;
  gap:25px;
  align-items:center;
}
.nav a{
  color:#ddd;
  font-size:.95rem;
  transition:color .25s,transform .2s;
  position:relative;
}
.nav a::after{
  content:'';
  position:absolute;
  bottom:-4px;
  left:0;
  width:0;
  height:2px;
  background:#e94560;
  transition:width .3s;
}
.nav a:hover{color:#e94560;text-decoration:none;transform:translateY(-1px)}
.nav a:hover::after{width:100%}
.menu-toggle{
  display:none;
  background:rgba(255,255,255,0.1);
  border:1px solid rgba(255,255,255,0.2);
  color:#fff;
  font-size:1.5rem;
  cursor:pointer;
  padding:6px 12px;
  border-radius:8px;
  backdrop-filter:blur(4px);
  transition:background .3s;
}
.menu-toggle:hover{background:rgba(233,69,96,0.3)}
@media(max-width:768px){
  .nav{
    display:none;
    flex-direction:column;
    position:absolute;
    top:70px;
    left:0;
    right:0;
    background:rgba(26,26,46,0.95);
    backdrop-filter:blur(16px);
    padding:20px;
    gap:15px;
    border-bottom:1px solid rgba(233,69,96,0.2);
    box-shadow:0 8px 30px rgba(0,0,0,.4);
    animation:slideDown .35s ease;
  }
  @keyframes slideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
  .nav.active{display:flex}
  .menu-toggle{display:block}
}

/* 英雄区 */
.hero{
  background:linear-gradient(135deg,#0f3460 0%,#1a1a2e 40%,#16213e 100%);
  color:#fff;
  padding:100px 0;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:'';
  position:absolute;
  top:-50%;left:-50%;
  width:200%;height:200%;
  background:radial-gradient(circle at 30% 40%,rgba(233,69,96,0.12) 0%,transparent 60%),
             radial-gradient(circle at 70% 60%,rgba(15,52,96,0.2) 0%,transparent 50%);
  animation:heroGlow 8s ease-in-out infinite alternate;
}
@keyframes heroGlow{0%{transform:translate(0,0) scale(1)}100%{transform:translate(20px,-20px) scale(1.05)}}
.hero .container{position:relative;z-index:1}
.hero h1{
  font-size:2.8rem;
  margin-bottom:20px;
  font-weight:800;
  background:linear-gradient(135deg,#fff,#e94560);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  text-shadow:none;
}
.hero p{
  font-size:1.2rem;
  max-width:700px;
  margin:0 auto 30px;
  color:rgba(255,255,255,0.8);
}
.hero .btn{
  display:inline-block;
  background:linear-gradient(135deg,#e94560,#ff6b81);
  color:#fff;
  padding:14px 40px;
  border-radius:50px;
  font-size:1.1rem;
  font-weight:600;
  transition:transform .3s,box-shadow .3s,filter .3s;
  border:0;
  cursor:pointer;
  box-shadow:0 4px 15px rgba(233,69,96,.3);
}
.hero .btn:hover{
  transform:translateY(-4px) scale(1.02);
  box-shadow:0 12px 30px rgba(233,69,96,.5);
  filter:brightness(1.1);
  text-decoration:none;
}

/* 通用区块 */
.section{padding:70px 0}
.section-title{
  font-size:2rem;
  margin-bottom:40px;
  text-align:center;
  position:relative;
  font-weight:700;
}
.section-title::after{
  content:'';
  display:block;
  width:60px;
  height:4px;
  background:linear-gradient(90deg,#e94560,#ff6b81);
  margin:12px auto 0;
  border-radius:4px;
  box-shadow:0 2px 8px rgba(233,69,96,.3);
}

/* 卡片网格 */
.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:25px;
  margin-top:30px;
}
.card{
  background:rgba(255,255,255,0.75);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-radius:16px;
  padding:28px;
  box-shadow:0 8px 25px rgba(0,0,0,.06),0 2px 6px rgba(0,0,0,.04);
  transition:transform .35s cubic-bezier(.25,.46,.45,.94),box-shadow .35s,background .3s;
  border:1px solid rgba(255,255,255,0.3);
}
.dark .card{
  background:rgba(30,30,48,0.75);
  backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,0.06);
  box-shadow:0 8px 25px rgba(0,0,0,.25);
}
.card:hover{
  transform:translateY(-8px) scale(1.01);
  box-shadow:0 16px 40px rgba(0,0,0,.1),0 4px 12px rgba(233,69,96,.08);
}
.dark .card:hover{box-shadow:0 16px 40px rgba(0,0,0,.4),0 4px 12px rgba(233,69,96,.12)}
.card h3{
  font-size:1.3rem;
  margin-bottom:10px;
  color:#16213e;
}
.dark .card h3{color:#e0e0e0}
.card p{color:#555;font-size:.95rem;line-height:1.7}
.dark .card p{color:#aaa}
.card .icon{font-size:2.2rem;margin-bottom:12px;display:block;filter:drop-shadow(0 2px 4px rgba(0,0,0,0.1))}

/* 关于网格 */
.about-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:50px;
  align-items:center;
}
.about-grid img{
  width:100%;
  border-radius:16px;
  box-shadow:0 8px 30px rgba(0,0,0,.12);
  transition:transform .4s,box-shadow .4s;
}
.about-grid img:hover{transform:scale(1.02);box-shadow:0 12px 40px rgba(0,0,0,.18)}
@media(max-width:768px){.about-grid{grid-template-columns:1fr;gap:30px}}

/* 统计数字 */
.stats{
  display:flex;
  justify-content:center;
  gap:60px;
  flex-wrap:wrap;
  margin:40px 0 10px;
}
.stat-item{text-align:center}
.stat-number{
  font-size:2.8rem;
  font-weight:800;
  background:linear-gradient(135deg,#e94560,#ff6b81);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.stat-label{color:#888;font-size:.95rem;margin-top:4px;display:block}

/* 轮播 */
.banner-slider{
  position:relative;
  overflow:hidden;
  border-radius:16px;
  height:320px;
  background:linear-gradient(135deg,#16213e,#1a1a2e);
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  text-align:center;
  box-shadow:0 8px 30px rgba(0,0,0,.15);
}
.banner-slide{
  position:absolute;
  width:100%;
  height:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  opacity:0;
  transition:opacity .7s ease,transform .7s ease;
  padding:20px;
  transform:scale(0.95);
}
.banner-slide.active{opacity:1;transform:scale(1)}
.banner-slide h2{font-size:2.2rem;margin-bottom:12px;text-shadow:0 2px 10px rgba(0,0,0,.3)}
.banner-slide p{font-size:1.1rem;color:rgba(255,255,255,0.8)}

/* FAQ */
.faq-item{
  border-bottom:1px solid rgba(0,0,0,0.08);
  padding:15px 0;
  transition:background .3s;
}
.dark .faq-item{border-color:rgba(255,255,255,0.08)}
.faq-question{
  display:flex;
  justify-content:space-between;
  align-items:center;
  cursor:pointer;
  font-weight:600;
  font-size:1.05rem;
  background:transparent;
  border:0;
  width:100%;
  text-align:left;
  padding:12px 0;
  color:inherit;
  transition:color .25s;
}
.faq-question:hover{color:#e94560}
.faq-question::after{
  content:'+';
  font-size:1.6rem;
  font-weight:300;
  transition:transform .4s,color .3s;
  color:#e94560;
}
.faq-item.active .faq-question::after{content:'−';transform:rotate(180deg)}
.faq-answer{
  padding:0 0 12px;
  display:none;
  color:#555;
  line-height:1.7;
  animation:fadeIn .4s ease;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
.dark .faq-answer{color:#aaa}
.faq-item.active .faq-answer{display:block}

/* 步骤指南 */
.howto-steps{counter-reset:step;list-style:none;padding:0}
.howto-steps li{
  counter-increment:step;
  padding:18px 0 18px 55px;
  position:relative;
  border-bottom:1px solid rgba(0,0,0,0.06);
  transition:background .3s,transform .2s;
}
.dark .howto-steps li{border-color:rgba(255,255,255,0.06)}
.howto-steps li:hover{background:rgba(233,69,96,0.04);transform:translateX(4px)}
.dark .howto-steps li:hover{background:rgba(233,69,96,0.08)}
.howto-steps li::before{
  content:counter(step);
  position:absolute;
  left:0;
  top:15px;
  width:34px;
  height:34px;
  background:linear-gradient(135deg,#e94560,#ff6b81);
  color:#fff;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  font-size:.9rem;
  box-shadow:0 4px 10px rgba(233,69,96,.25);
}

/* 文章卡片 */
.articles{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
  gap:25px;
}
.article-card{
  background:rgba(255,255,255,0.75);
  backdrop-filter:blur(10px);
  border-radius:16px;
  padding:24px;
  box-shadow:0 8px 25px rgba(0,0,0,.06);
  border:1px solid rgba(255,255,255,0.3);
  transition:transform .35s,box-shadow .35s;
}
.dark .article-card{
  background:rgba(30,30,48,0.75);
  border:1px solid rgba(255,255,255,0.06);
}
.article-card:hover{transform:translateY(-6px);box-shadow:0 14px 35px rgba(0,0,0,.1)}
.article-card h3{font-size:1.15rem;margin-bottom:8px;color:#16213e}
.dark .article-card h3{color:#e0e0e0}
.article-card .meta{font-size:.85rem;color:#888;margin-bottom:10px;display:block}
.article-card p{color:#555;font-size:.9rem;line-height:1.7}
.dark .article-card p{color:#aaa}
.article-card a{color:#e94560;font-weight:600;transition:color .25s}
.article-card a:hover{color:#ff6b81}

/* 评价 */
.testimonials{
  background:linear-gradient(135deg,#f0f2f5 0%,#e4e8ed 100%);
}
.dark .testimonials{
  background:linear-gradient(135deg,#0f0f1a 0%,#14141f 100%);
}
.testimonial-card{
  background:rgba(255,255,255,0.75);
  backdrop-filter:blur(10px);
  border-radius:16px;
  padding:30px;
  box-shadow:0 8px 25px rgba(0,0,0,.06);
  border:1px solid rgba(255,255,255,0.3);
  text-align:center;
  transition:transform .35s,box-shadow .35s;
}
.dark .testimonial-card{
  background:rgba(30,30,48,0.75);
  border:1px solid rgba(255,255,255,0.06);
}
.testimonial-card:hover{transform:translateY(-6px) scale(1.01);box-shadow:0 14px 35px rgba(0,0,0,.1)}
.testimonial-card .quote{
  font-style:italic;
  margin-bottom:18px;
  color:#555;
  font-size:1.05rem;
  line-height:1.7;
}
.dark .testimonial-card .quote{color:#aaa}
.testimonial-card .author{
  font-weight:700;
  color:#16213e;
}
.dark .testimonial-card .author{color:#e0e0e0}

/* 联系表单 */
.contact-form{max-width:600px;margin:0 auto}
.contact-form label{display:block;margin-bottom:6px;font-weight:600;font-size:.95rem}
.contact-form input,.contact-form textarea{
  width:100%;
  padding:14px;
  margin-bottom:22px;
  border:1px solid rgba(0,0,0,0.1);
  border-radius:12px;
  font-size:1rem;
  background:rgba(255,255,255,0.8);
  color:#1a1a2e;
  transition:border-color .3s,box-shadow .3s,background .3s;
  outline:none;
}
.contact-form input:focus,.contact-form textarea:focus{
  border-color:#e94560;
  box-shadow:0 0 0 3px rgba(233,69,96,.15);
  background:#fff;
}
.dark .contact-form input,.dark .contact-form textarea{
  background:rgba(30,30,48,0.8);
  border-color:rgba(255,255,255,0.1);
  color:#e0e0e0;
}
.dark .contact-form input:focus,.dark .contact-form textarea:focus{
  border-color:#e94560;
  box-shadow:0 0 0 3px rgba(233,69,96,.2);
  background:rgba(30,30,48,0.95);
}
.contact-form button{
  background:linear-gradient(135deg,#e94560,#ff6b81);
  color:#fff;
  padding:14px 36px;
  border:0;
  border-radius:12px;
  font-size:1rem;
  font-weight:600;
  cursor:pointer;
  transition:transform .3s,box-shadow .3s,filter .3s;
  box-shadow:0 4px 15px rgba(233,69,96,.3);
}
.contact-form button:hover{
  transform:translateY(-3px);
  box-shadow:0 8px 25px rgba(233,69,96,.4);
  filter:brightness(1.08);
}

/* 搜索 */
.search-box{
  display:flex;
  gap:12px;
  margin:20px 0;
  max-width:600px;
  margin-left:auto;
  margin-right:auto;
}
.search-box input{
  flex:1;
  padding:12px 18px;
  border:1px solid rgba(0,0,0,0.1);
  border-radius:12px;
  font-size:1rem;
  background:rgba(255,255,255,0.8);
  transition:border-color .3s,box-shadow .3s;
  outline:none;
}
.search-box input:focus{border-color:#e94560;box-shadow:0 0 0 3px rgba(233,69,96,.15)}
.dark .search-box input{
  background:rgba(30,30,48,0.8);
  border-color:rgba(255,255,255,0.1);
  color:#e0e0e0;
}
.search-box button{
  padding:12px 24px;
  background:linear-gradient(135deg,#e94560,#ff6b81);
  color:#fff;
  border:0;
  border-radius:12px;
  cursor:pointer;
  font-weight:600;
  transition:transform .3s,box-shadow .3s;
}
.search-box button:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(233,69,96,.35)}

/* 深色模式切换 */
.dark-mode-toggle{
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(233,69,96,0.4);
  color:#e94560;
  padding:7px 16px;
  border-radius:24px;
  cursor:pointer;
  font-size:.85rem;
  transition:background .3s,color .3s,box-shadow .3s;
  backdrop-filter:blur(4px);
}
.dark-mode-toggle:hover{
  background:rgba(233,69,96,0.2);
  color:#fff;
  box-shadow:0 0 15px rgba(233,69,96,.2);
}

/* 页脚 */
.footer{
  background:linear-gradient(135deg,#1a1a2e,#0f0f1a);
  color:#ccc;
  padding:50px 0 40px;
  text-align:center;
  border-top:1px solid rgba(233,69,96,0.1);
}
.footer a{color:#e94560;transition:color .25s}
.footer a:hover{color:#ff6b81}
.footer .legal{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:24px;
  margin-top:22px;
  font-size:.85rem;
}
.footer .legal a{color:#aaa;transition:color .25s}
.footer .legal a:hover{color:#e94560}

/* 回到顶部 */
.back-to-top{
  position:fixed;
  bottom:35px;
  right:35px;
  width:48px;
  height:48px;
  background:linear-gradient(135deg,#e94560,#ff6b81);
  color:#fff;
  border:0;
  border-radius:50%;
  font-size:1.4rem;
  cursor:pointer;
  display:none;
  align-items:center;
  justify-content:center;
  box-shadow:0 6px 20px rgba(233,69,96,.35);
  z-index:999;
  transition:opacity .4s,transform .3s,box-shadow .3s;
  opacity:0;
  transform:translateY(10px);
}
.back-to-top.visible{display:flex;opacity:1;transform:translateY(0)}
.back-to-top:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 10px 30px rgba(233,69,96,.45)}

/* 联系信息 */
.contact-info{
  font-style:normal;
  line-height:1.9;
  background:rgba(255,255,255,0.5);
  backdrop-filter:blur(8px);
  padding:24px;
  border-radius:16px;
  margin-bottom:30px;
  border:1px solid rgba(255,255,255,0.3);
}
.dark .contact-info{
  background:rgba(30,30,48,0.5);
  border:1px solid rgba(255,255,255,0.06);
}
.contact-info strong{color:#16213e}
.dark .contact-info strong{color:#e0e0e0}

/* 滚动锚点偏移 */
.scroll-highlight{scroll-margin-top:90px}

/* 额外动画 */
@keyframes float{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-8px)}
}
.card .icon{animation:float 3s ease-in-out infinite}
.card:nth-child(2) .icon{animation-delay:0.5s}
.card:nth-child(3) .icon{animation-delay:1s}
.card:nth-child(4) .icon{animation-delay:1.5s}
.card:nth-child(5) .icon{animation-delay:0.2s}
.card:nth-child(6) .icon{animation-delay:0.7s}

/* 响应式微调 */
@media(max-width:600px){
  .hero h1{font-size:2rem}
  .hero{padding:70px 0}
  .section-title{font-size:1.6rem}
  .stats{gap:30px}
  .stat-number{font-size:2.2rem}
  .banner-slider{height:240px}
  .banner-slide h2{font-size:1.5rem}
  .back-to-top{bottom:20px;right:20px;width:42px;height:42px;font-size:1.2rem}
}