*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#222;background:#fff;line-height:1.8;overflow-x:hidden;transition:background .4s ease,color .4s ease}
a{color:#ff4d6d;text-decoration:none;transition:color .25s ease,opacity .25s ease}
a:hover{text-decoration:underline;color:#e63a5a}
img{max-width:100%;display:block}
::selection{background:#ff4d6d;color:#fff}

/* ===== 顶部导航 ===== */
header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);border-bottom:1px solid rgba(0,0,0,.06);box-shadow:0 2px 16px rgba(255,77,109,.06);transition:background .4s ease,border-color .4s ease}
.nav-wrap{max-width:1200px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.logo{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:700;color:#ff4d6d;letter-spacing:.5px;transition:transform .3s ease}
.logo:hover{text-decoration:none;transform:scale(1.04)}
.logo svg{transition:transform .5s cubic-bezier(.34,1.56,.64,1)}
.logo:hover svg{transform:rotate(72deg) scale(1.08)}
nav ul{display:flex;list-style:none;gap:18px;flex-wrap:wrap}
nav a{color:#333;font-size:15px;position:relative;padding:2px 0;transition:color .25s ease}
nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;border-radius:2px;background:linear-gradient(90deg,#ff4d6d,#ff8fa3);transition:width .3s ease}
nav a:hover{color:#ff4d6d;text-decoration:none}
nav a:hover::after{width:100%}

/* ===== 搜索框 ===== */
.search-box{display:flex;gap:6px}
.search-box input{padding:7px 12px;border:1px solid #e5e5e5;border-radius:8px;font-size:14px;outline:none;background:rgba(255,255,255,.7);transition:border-color .25s ease,box-shadow .25s ease,background .3s ease;width:180px}
.search-box input:focus{border-color:#ff4d6d;box-shadow:0 0 0 3px rgba(255,77,109,.15)}
.search-box button{padding:7px 16px;border:none;background:linear-gradient(135deg,#ff4d6d,#ff7a92);color:#fff;border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;transition:transform .2s ease,box-shadow .25s ease,filter .25s ease}
.search-box button:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(255,77,109,.35);filter:brightness(1.05)}
.search-box button:active{transform:translateY(0) scale(.97)}

/* ===== 面包屑 ===== */
.breadcrumb{max-width:1200px;margin:14px auto;padding:0 20px;font-size:13px;color:#888}
.breadcrumb a{color:#888}
.breadcrumb a:hover{color:#ff4d6d}

/* ===== 主容器 ===== */
main{max-width:1200px;margin:0 auto;padding:0 20px 60px}
section{margin-bottom:48px;animation:fadeUp .7s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}

/* ===== 标题体系 ===== */
h1{font-size:28px;line-height:1.4;margin-bottom:16px;color:#111;font-weight:700;letter-spacing:.3px}
h2{font-size:22px;margin:32px 0 14px;padding-left:14px;border-left:4px solid #ff4d6d;color:#111;font-weight:700;position:relative}
h2::after{content:"";position:absolute;left:0;bottom:-6px;width:60px;height:3px;border-radius:3px;background:linear-gradient(90deg,rgba(255,77,109,.35),transparent)}
h3{font-size:18px;margin:22px 0 10px;color:#222;font-weight:600}
h4{font-size:16px;margin:16px 0 8px;color:#333;font-weight:600}
p{margin-bottom:14px;color:#333;font-size:15px}
ul,ol{margin:0 0 16px 22px;color:#333;font-size:15px}
li{margin-bottom:6px}
strong{color:#ff4d6d;font-weight:600}

/* ===== Hero ===== */
.hero{position:relative;background:linear-gradient(135deg,#fff0f3 0%,#ffe0e6 50%,#ffd6e0 100%);border-radius:20px;padding:40px 32px;margin-bottom:36px;overflow:hidden;box-shadow:0 10px 40px rgba(255,77,109,.1)}
.hero::before{content:"";position:absolute;top:-60px;right:-60px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(255,77,109,.22),transparent 70%);pointer-events:none}
.hero::after{content:"";position:absolute;bottom:-80px;left:-40px;width:200px;height:200px;border-radius:50%;background:radial-gradient(circle,rgba(255,143,163,.2),transparent 70%);pointer-events:none}
.hero p{font-size:16px;color:#444;position:relative;z-index:1}
.hero h1{position:relative;z-index:1}

/* ===== 统计 ===== */
.stats{display:flex;gap:20px;flex-wrap:wrap;margin:24px 0;position:relative;z-index:1}
.stat{flex:1;min-width:150px;background:rgba(255,255,255,.65);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.8);border-radius:14px;padding:22px 16px;text-align:center;transition:transform .3s ease,box-shadow .3s ease;cursor:default}
.stat:hover{transform:translateY(-6px);box-shadow:0 12px 28px rgba(255,77,109,.18)}
.stat b{display:block;font-size:28px;color:#ff4d6d;font-weight:800;letter-spacing:.5px;line-height:1.3}
.stat span{font-size:13px;color:#666}

/* ===== Banner 轮播 ===== */
.banner{position:relative;overflow:hidden;border-radius:20px;background:linear-gradient(120deg,#1a1a2e 0%,#2d1b2e 40%,#3d1f2a 70%,#1a1a2e 100%);background-size:200% 200%;color:#fff;min-height:240px;margin-bottom:36px;box-shadow:0 12px 44px rgba(0,0,0,.22);animation:gradientShift 12s ease infinite}
@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}
.banner::before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 40%,rgba(255,77,109,.18),transparent 45%),radial-gradient(circle at 75% 65%,rgba(255,143,163,.14),transparent 45%);pointer-events:none}
.banner-slide{display:none;padding:40px 32px;position:relative;z-index:1}
.banner-slide.active{display:block;animation:slideIn .6s ease both}
@keyframes slideIn{from{opacity:0;transform:translateX(28px)}to{opacity:1;transform:translateX(0)}}
.banner-slide h2{color:#fff;border-left:4px solid #ff4d6d;margin-top:0;font-size:24px}
.banner-slide h2::after{display:none}
.banner-slide p{color:#e8e8e8;font-size:15px;max-width:760px}
.banner-dots{position:absolute;bottom:16px;right:22px;display:flex;gap:8px;z-index:2}
.banner-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.35);cursor:pointer;transition:background .3s ease,transform .3s ease,width .3s ease}
.banner-dots span:hover{background:rgba(255,255,255,.6)}
.banner-dots span.active{background:#ff4d6d;width:26px;border-radius:6px;transform:scale(1.02)}

/* ===== 卡片网格 ===== */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin:18px 0}
.card{position:relative;border:1px solid rgba(0,0,0,.06);border-radius:16px;padding:22px;background:rgba(255,255,255,.7);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:transform .32s cubic-bezier(.34,1.4,.64,1),box-shadow .32s ease,border-color .32s ease;overflow:hidden}
.card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,#ff4d6d,#ff8fa3);transform:scaleX(0);transform-origin:left;transition:transform .4s ease}
.card:hover{transform:translateY(-8px);box-shadow:0 16px 36px rgba(255,77,109,.16);border-color:rgba(255,77,109,.25)}
.card:hover::before{transform:scaleX(1)}
.card h4{margin-top:0;transition:color .3s ease}
.card:hover h4{color:#ff4d6d}
.card p{font-size:14px;color:#555;margin-bottom:0}

/* ===== 文章列表 ===== */
.article-list article{border-bottom:1px dashed rgba(0,0,0,.1);padding:18px 0;transition:transform .3s ease,padding-left .3s ease}
.article-list article:hover{transform:translateX(6px);padding-left:8px}
.article-list article:last-child{border-bottom:none}
.article-list h3{margin:0 0 6px;font-size:17px;transition:color .3s ease}
.article-list article:hover h3{color:#ff4d6d}
.article-list time{font-size:13px;color:#999;display:inline-block;margin-bottom:2px}
.article-list p{font-size:14px;color:#555;margin:8px 0 0}
.article-list a{font-size:14px;font-weight:600;display:inline-block;margin-top:8px;transition:transform .25s ease}
.article-list a:hover{transform:translateX(4px)}

/* ===== FAQ ===== */
.faq details{border:1px solid rgba(0,0,0,.07);border-radius:12px;margin-bottom:10px;padding:14px 18px;background:rgba(250,250,250,.8);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);transition:box-shadow .3s ease,border-color .3s ease,background .3s ease}
.faq details[open]{box-shadow:0 8px 24px rgba(255,77,109,.1);border-color:rgba(255,77,109,.25)}
.faq details:hover{border-color:rgba(255,77,109,.3)}
.faq summary{cursor:pointer;font-weight:600;color:#222;font-size:15px;list-style:none;position:relative;padding-right:24px;transition:color .25s ease}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);font-size:20px;color:#ff4d6d;font-weight:400;transition:transform .3s ease}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq summary:hover{color:#ff4d6d}
.faq details p{margin-top:10px;font-size:14px;color:#444;animation:fadeUp .4s ease both}

/* ===== HowTo ===== */
.howto ol{margin-left:22px;counter-reset:step}
.howto ol li{padding-left:4px}
.howto ol li::marker{color:#ff4d6d;font-weight:700}

/* ===== 页脚 ===== */
footer{background:linear-gradient(180deg,#1a1a1a,#111);color:#bbb;padding:40px 20px 0;font-size:14px;position:relative;overflow:hidden}
footer::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,#ff4d6d,#ff8fa3,#ff4d6d);background-size:200% 100%;animation:gradientShift 6s linear infinite}
footer a{color:#ff8fa3;transition:color .25s ease}
footer a:hover{color:#ff4d6d}
.footer-wrap{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.footer-wrap h4{color:#fff;font-size:15px;margin-bottom:10px;position:relative;padding-bottom:8px}
.footer-wrap h4::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;border-radius:2px;background:#ff4d6d}
.footer-wrap ul{list-style:none;margin:0}
.footer-wrap li{margin-bottom:6px;font-size:14px}
.footer-bottom{max-width:1200px;margin:24px auto 0;padding:18px 0;border-top:1px solid #333;font-size:13px;color:#888;text-align:center}

/* ===== 返回顶部 ===== */
.ba-top{position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,#ff4d6d,#ff7a92);color:#fff;border:none;cursor:pointer;font-size:20px;display:none;z-index:999;box-shadow:0 8px 22px rgba(255,77,109,.4);transition:transform .3s ease,box-shadow .3s ease,opacity .3s ease}
.ba-top:hover{transform:translateY(-4px) scale(1.06);box-shadow:0 12px 28px rgba(255,77,109,.55)}
.ba-top:active{transform:scale(.94)}

/* ===== 暗色模式 ===== */
.dark{background:#121212;color:#ddd}
.dark header{background:rgba(27,27,27,.85);border-color:#333;box-shadow:0 2px 16px rgba(0,0,0,.5)}
.dark nav a{color:#ddd}
.dark nav a:hover{color:#ff8fa3}
.dark .search-box input{background:rgba(255,255,255,.06);border-color:#3a3a3a;color:#eee}
.dark .search-box input::placeholder{color:#888}
.dark h1,.dark h2,.dark h3,.dark h4{color:#fff}
.dark p,.dark li{color:#ccc}
.dark strong{color:#ff8fa3}
.dark .breadcrumb,.dark .breadcrumb a{color:#999}
.dark .card{background:rgba(30,30,30,.75);border-color:#333}
.dark .card:hover{box-shadow:0 16px 36px rgba(255,77,109,.2);border-color:rgba(255,77,109,.4)}
.dark .card p{color:#aaa}
.dark .faq details{background:rgba(30,30,30,.8);border-color:#333}
.dark .faq summary{color:#eee}
.dark .faq details p{color:#bbb}
.dark .hero{background:linear-gradient(135deg,#2a1a1e 0%,#3a1f26 50%,#4a2430 100%)}
.dark .hero p{color:#ddd}
.dark .stat{background:rgba(42,26,30,.75);border-color:rgba(255,77,109,.2)}
.dark .stat span{color:#aaa}
.dark .article-list article{border-color:rgba(255,255,255,.1)}
.dark .article-list h3{color:#eee}
.dark .article-list p{color:#aaa}
.dark .article-list time{color:#777}
.dark footer{background:linear-gradient(180deg,#0a0a0a,#050505)}
.dark .ba-top{box-shadow:0 8px 22px rgba(0,0,0,.6)}

/* ===== 响应式 ===== */
@media(max-width:900px){
  .nav-wrap{justify-content:center}
  nav ul{justify-content:center}
  .search-box{width:100%;justify-content:center}
  .search-box input{flex:1;max-width:280px}
}
@media(max-width:768px){
  h1{font-size:22px}
  h2{font-size:19px;margin:26px 0 12px}
  h3{font-size:17px}
  .hero{padding:26px 18px;border-radius:16px}
  .hero p{font-size:15px}
  .banner{border-radius:16px;min-height:auto}
  .banner-slide{padding:28px 20px}
  .banner-slide h2{font-size:19px}
  .banner-slide p{font-size:14px}
  .stats{gap:12px}
  .stat{min-width:calc(50% - 6px);padding:16px 10px}
  .stat b{font-size:22px}
  .card-grid{grid-template-columns:1fr;gap:14px}
  .card{padding:18px;border-radius:14px}
  .footer-wrap{grid-template-columns:1fr;gap:20px}
  .ba-top{right:14px;bottom:16px;width:42px;height:42px;font-size:18px}
  main{padding:0 16px 48px}
  .breadcrumb{padding:0 16px}
}
@media(max-width:480px){
  .logo{font-size:18px}
  nav ul{gap:10px}
  nav a{font-size:14px}
  .stat{min-width:100%}
  .search-box input{width:100%}
}

/* ===== 滚动动画 ===== */
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}