:root{
  --brand:#c2185b;
  --brand-2:#7b1fa2;
  --brand-soft:#fce4ec;
  --bg:#f7f5f8;
  --bg-2:#ffffff;
  --text:#2b2b2b;
  --text-2:#5a5a5a;
  --muted:#8a8a8a;
  --line:rgba(0,0,0,.08);
  --card:rgba(255,255,255,.72);
  --card-solid:#ffffff;
  --shadow:0 4px 18px rgba(60,20,50,.08);
  --shadow-hover:0 14px 36px rgba(120,20,80,.18);
  --radius:16px;
  --radius-sm:12px;
  --glass-blur:14px;
  --header-h:68px;
  --ease:cubic-bezier(.22,.9,.3,1);
}

*{margin:0;padding:0;box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 8% -10%,rgba(194,24,91,.10),transparent 60%),
    radial-gradient(1000px 520px at 100% 0%,rgba(123,31,162,.10),transparent 55%),
    linear-gradient(180deg,#fbf7fa 0%,var(--bg) 40%,#f4f1f6 100%);
  background-attachment:fixed;
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

::selection{background:rgba(194,24,91,.22);color:#1a1a1a}

a{color:var(--brand);text-decoration:none;transition:color .25s var(--ease),opacity .25s var(--ease)}
a:hover{color:var(--brand-2);text-decoration:none}

img,svg{max-width:100%;display:block}

.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* ============ 头部 / 毛玻璃 ============ */
header.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:saturate(180%) blur(var(--glass-blur));
  backdrop-filter:saturate(180%) blur(var(--glass-blur));
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 20px rgba(60,20,50,.06);
  transition:background .35s var(--ease),box-shadow .35s var(--ease);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:var(--header-h);
  gap:20px;
}

.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:22px;
  font-weight:800;
  letter-spacing:.5px;
  color:var(--brand);
  flex-shrink:0;
}
.logo svg{
  width:38px;height:38px;
  border-radius:12px;
  box-shadow:0 4px 14px rgba(194,24,91,.35);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.logo:hover svg{transform:rotate(-6deg) scale(1.06);box-shadow:0 8px 22px rgba(194,24,91,.45)}
.logo:hover{color:var(--brand-2);text-decoration:none}

nav.main-nav ul{display:flex;gap:6px;list-style:none;flex-wrap:nowrap}
nav.main-nav a{
  position:relative;
  display:inline-block;
  color:var(--text-2);
  font-size:15px;
  font-weight:500;
  padding:8px 10px;
  border-radius:10px;
  transition:color .25s var(--ease),background .25s var(--ease);
}
nav.main-nav a::after{
  content:"";
  position:absolute;
  left:10px;right:10px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
nav.main-nav a:hover{color:var(--brand);background:rgba(194,24,91,.06);text-decoration:none}
nav.main-nav a:hover::after{transform:scaleX(1)}

.header-tools{display:flex;align-items:center;gap:10px;flex-shrink:0}

.search-box{
  display:flex;
  align-items:center;
  border:1px solid var(--line);
  border-radius:22px;
  padding:4px 6px 4px 14px;
  background:rgba(255,255,255,.6);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease);
}
.search-box:focus-within{
  border-color:rgba(194,24,91,.45);
  box-shadow:0 0 0 4px rgba(194,24,91,.10);
  background:#fff;
}
.search-box input{
  border:none;background:transparent;outline:none;
  font-size:14px;width:130px;color:var(--text);
}
.search-box input::placeholder{color:var(--muted)}
.search-box button{
  border:none;background:transparent;cursor:pointer;
  color:var(--brand);font-size:14px;
  width:30px;height:30px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  transition:background .25s var(--ease),transform .25s var(--ease);
}
.search-box button:hover{background:rgba(194,24,91,.10);transform:scale(1.1)}

.icon-btn{
  border:1px solid var(--line);
  background:rgba(255,255,255,.6);
  border-radius:50%;
  width:38px;height:38px;
  cursor:pointer;
  font-size:16px;
  display:flex;align-items:center;justify-content:center;
  transition:transform .3s var(--ease),background .3s var(--ease),box-shadow .3s var(--ease);
}
.icon-btn:hover{transform:rotate(18deg) scale(1.08);background:#fff;box-shadow:0 6px 16px rgba(194,24,91,.22)}

.menu-toggle{
  display:none;
  border:none;background:transparent;
  font-size:24px;cursor:pointer;color:var(--brand);
  width:40px;height:40px;border-radius:12px;
  transition:background .25s var(--ease);
}
.menu-toggle:hover{background:rgba(194,24,91,.08)}

/* ============ 面包屑 ============ */
.breadcrumb{
  font-size:13px;color:var(--muted);
  padding:14px 0;
  display:flex;flex-wrap:wrap;align-items:center;
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{margin:0 6px}

/* ============ Hero 渐变 Banner ============ */
.hero{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,#c2185b 0%,#8e24aa 48%,#5e35b1 100%);
  background-size:200% 200%;
  animation:heroShift 14s ease infinite;
  color:#fff;
  padding:56px 0 48px;
  border-radius:0 0 28px 28px;
  box-shadow:0 18px 48px rgba(123,31,162,.28);
}
.hero::before{
  content:"";
  position:absolute;inset:0;
  background:
    radial-gradient(600px 300px at 12% 0%,rgba(255,255,255,.22),transparent 60%),
    radial-gradient(500px 260px at 92% 100%,rgba(255,255,255,.16),transparent 60%);
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;
  width:420px;height:420px;
  right:-140px;top:-160px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.18),transparent 70%);
  pointer-events:none;
}
.hero .container{position:relative;z-index:1}
.hero h1{
  font-size:34px;
  line-height:1.35;
  margin-bottom:16px;
  font-weight:800;
  letter-spacing:.4px;
  text-shadow:0 2px 18px rgba(0,0,0,.18);
}
.hero p{
  font-size:17px;
  max-width:820px;
  color:rgba(255,255,255,.94);
  margin-bottom:18px;
}
.hero .hero-meta{
  display:flex;flex-wrap:wrap;gap:10px 20px;
  font-size:14px;
  color:rgba(255,255,255,.9);
}
.hero .hero-meta span{
  display:inline-flex;align-items:center;gap:4px;
  background:rgba(255,255,255,.12);
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
  border:1px solid rgba(255,255,255,.18);
  padding:4px 12px;
  border-radius:20px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-tags a{
  background:rgba(255,255,255,.16);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.24);
  color:#fff;
  padding:7px 16px;
  border-radius:20px;
  font-size:13px;
  transition:background .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease);
}
.hero-tags a:hover{
  background:rgba(255,255,255,.3);
  transform:translateY(-2px);
  box-shadow:0 8px 20px rgba(0,0,0,.18);
  text-decoration:none;
  color:#fff;
}

@keyframes heroShift{
  0%{background-position:0% 50%}
  50%{background-position:100% 50%}
  100%{background-position:0% 50%}
}

/* ============ 轮播 Banner ============ */
.banner-carousel{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius);
  margin:28px 0;
  background:linear-gradient(135deg,#1f1030 0%,#3a1250 55%,#5a1450 100%);
  color:#fff;
  min-height:260px;
  box-shadow:0 16px 40px rgba(60,20,60,.28);
  border:1px solid rgba(255,255,255,.08);
}
.banner-carousel::before{
  content:"";
  position:absolute;inset:0;
  background:
    radial-gradient(400px 200px at 85% 10%,rgba(194,24,91,.35),transparent 65%),
    radial-gradient(360px 200px at 10% 100%,rgba(123,31,162,.35),transparent 65%);
  pointer-events:none;
}
.banner-slide{
  display:none;
  position:relative;
  z-index:1;
  padding:38px 34px 56px;
  min-height:260px;
}
.banner-slide.active{display:block;animation:fadeIn .6s var(--ease)}
@keyframes fadeIn{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:translateY(0)}
}
.banner-slide h2{
  font-size:26px;
  margin-bottom:12px;
  font-weight:800;
  padding-left:0;
  color:#fff;
}
.banner-slide h2::before{display:none}
.banner-slide p{
  font-size:15px;
  color:rgba(255,255,255,.88);
  margin-bottom:18px;
  max-width:640px;
}
.banner-slide a{
  display:inline-block;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;
  padding:10px 24px;
  border-radius:22px;
  font-size:14px;
  font-weight:600;
  box-shadow:0 8px 22px rgba(194,24,91,.45);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease);
}
.banner-slide a:hover{
  transform:translateY(-2px) scale(1.03);
  box-shadow:0 14px 30px rgba(194,24,91,.6);
  filter:brightness(1.08);
  text-decoration:none;
  color:#fff;
}
.banner-dots{
  position:absolute;
  bottom:18px;left:34px;
  display:flex;gap:8px;
  z-index:2;
}
.banner-dots button{
  width:10px;height:10px;
  border-radius:50%;
  border:none;
  background:rgba(255,255,255,.38);
  cursor:pointer;
  transition:width .3s var(--ease),background .3s var(--ease);
}
.banner-dots button.active{background:#fff;width:26px;border-radius:6px}
.banner-dots button:hover{background:rgba(255,255,255,.7)}

/* ============ 区块 ============ */
section.block{
  padding:44px 0;
  border-bottom:1px solid var(--line);
}
section.block:last-of-type{border-bottom:none}
section.block h2{
  font-size:26px;
  color:var(--text);
  margin-bottom:8px;
  font-weight:800;
  position:relative;
  padding-left:16px;
  letter-spacing:.3px;
}
section.block h2::before{
  content:"";
  position:absolute;
  left:0;top:6px;bottom:6px;
  width:5px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  box-shadow:0 0 12px rgba(194,24,91,.45);
}
section.block .block-desc{
  color:var(--text-2);
  font-size:15px;
  margin-bottom:26px;
}

h3{font-size:19px;color:var(--brand);margin:26px 0 10px;font-weight:700}
h4{font-size:16px;color:var(--text);margin:18px 0 8px;font-weight:700}
p{margin-bottom:14px;color:var(--text-2)}

/* ============ 网格 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}

/* ============ 卡片 毛玻璃 ============ */
.card{
  position:relative;
  overflow:hidden;
  background:var(--card);
  -webkit-backdrop-filter:blur(var(--glass-blur)) saturate(160%);
  backdrop-filter:blur(var(--glass-blur)) saturate(160%);
  border:1px solid rgba(255,255,255,.6);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.card::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(194,24,91,.06),transparent 45%);
  opacity:0;
  transition:opacity .35s var(--ease);
  pointer-events:none;
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(194,24,91,.22);
}
.card:hover::before{opacity:1}
.card h3{margin-top:0;color:var(--brand)}
.card .icon{
  width:46px;height:46px;
  margin-bottom:14px;
  transition:transform .4s var(--ease);
}
.card:hover .icon{transform:scale(1.1) rotate(-4deg)}

/* ============ 数据统计 ============ */
.stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  text-align:center;
  margin:28px 0 4px;
}
.stat-item{
  background:var(--card);
  -webkit-backdrop-filter:blur(var(--glass-blur));
  backdrop-filter:blur(var(--glass-blur));
  border:1px solid rgba(255,255,255,.6);
  border-radius:var(--radius-sm);
  padding:20px 12px;
  box-shadow:var(--shadow);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.stat-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.stat-item .num{
  font-size:34px;
  font-weight:800;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:var(--brand);
  line-height:1.2;
}
.stat-item .label{font-size:14px;color:var(--muted)}

/* ============ 文章列表 ============ */
.article-list{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:22px;
}
.article-item{
  position:relative;
  background:var(--card);
  -webkit-backdrop-filter:blur(var(--glass-blur)) saturate(160%);
  backdrop-filter:blur(var(--glass-blur)) saturate(160%);
  border:1px solid rgba(255,255,255,.6);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow);
  display:flex;
  flex-direction:column;
  overflow:hidden;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.article-item::after{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:4px;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  transform:scaleY(0);
  transform-origin:top;
  transition:transform .4s var(--ease);
}
.article-item:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(194,24,91,.22);
}
.article-item:hover::after{transform:scaleY(1)}
.article-item h3{
  margin-top:0;
  font-size:18px;
  color:var(--text);
  transition:color .3s var(--ease);
}
.article-item:hover h3{color:var(--brand)}
.article-item .meta{font-size:13px;color:var(--muted);margin-bottom:10px}
.article-item p{font-size:14px;flex:1;color:var(--text-2)}
.article-item .read-more{
  font-size:14px;
  font-weight:600;
  margin-top:10px;
  display:inline-flex;
  align-items:center;
  gap:4px;
  align-self:flex-start;
  transition:gap .3s var(--ease),color .3s var(--ease);
}
.article-item:hover .read-more{gap:9px}

/* ============ FAQ ============ */
.faq-item{
  background:var(--card);
  -webkit-backdrop-filter:blur(var(--glass-blur));
  backdrop-filter:blur(var(--glass-blur));
  border:1px solid rgba(255,255,255,.6);
  border-radius:var(--radius-sm);
  margin-bottom:12px;
  box-shadow:0 2px 10px rgba(60,20,50,.05);
  overflow:hidden;
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.faq-item:hover{box-shadow:0 8px 22px rgba(60,20,50,.1);border-color:rgba(194,24,91,.18)}
.faq-q{
  width:100%;
  text-align:left;
  border:none;
  background:transparent;
  padding:18px 22px;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:14px;
  color:var(--text);
  font-family:inherit;
  transition:color .25s var(--ease),background .25s var(--ease);
}
.faq-q:hover{color:var(--brand);background:rgba(194,24,91,.04)}
.faq-q .arrow{
  transition:transform .35s var(--ease);
  color:var(--brand);
  flex-shrink:0;
}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-item.open .faq-q{color:var(--brand)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .45s var(--ease),padding .45s var(--ease);
  padding:0 22px;
  color:var(--text-2);
  font-size:15px;
}
.faq-a p:last-child{margin-bottom:0}
.faq-item.open .faq-a{max-height:600px;padding-bottom:18px}

/* ============ 步骤 ============ */
.steps{counter-reset:step;list-style:none;margin-top:8px}
.steps li{
  position:relative;
  padding-left:58px;
  margin-bottom:24px;
  padding-bottom:4px;
}
.steps li::before{
  counter-increment:step;
  content:counter(step);
  position:absolute;
  left:0;top:0;
  width:40px;height:40px;
  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;
  box-shadow:0 6px 16px rgba(194,24,91,.35);
  transition:transform .3s var(--ease);
}
.steps li:hover::before{transform:scale(1.1)}
.steps li h4{margin-top:2px;color:var(--text)}

/* ============ 团队 ============ */
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.team-card{
  text-align:center;
  background:var(--card);
  -webkit-backdrop-filter:blur(var(--glass-blur));
  backdrop-filter:blur(var(--glass-blur));
  border:1px solid rgba(255,255,255,.6);
  border-radius:var(--radius);
  padding:24px 18px;
  box-shadow:var(--shadow);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.team-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.team-card svg{
  width:72px;height:72px;
  margin:0 auto 14px;
  border-radius:50%;
  transition:transform .4s var(--ease);
}
.team-card:hover svg{transform:scale(1.08)}
.team-card .name{font-weight:700;font-size:16px;color:var(--text)}
.team-card .role{font-size:13px;color:var(--brand);margin-bottom:6px;font-weight:600}
.team-card .bio{font-size:13px;color:var(--muted)}

/* ============ 案例 ============ */
.case-item{
  background:var(--card);
  -webkit-backdrop-filter:blur(var(--glass-blur));
  backdrop-filter:blur(var(--glass-blur));
  border:1px solid rgba(255,255,255,.6);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.case-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.case-item h3{margin-top:0;color:var(--text)}
.case-item .tag{
  display:inline-block;
  background:linear-gradient(135deg,rgba(194,24,91,.12),rgba(123,31,162,.12));
  color:var(--brand);
  font-size:12px;
  font-weight:600;
  padding:4px 12px;
  border-radius:12px;
  margin-bottom:12px;
  border:1px solid rgba(194,24,91,.18);
}

/* ============ 评价 ============ */
.testimonial{
  position:relative;
  background:var(--card);
  -webkit-backdrop-filter:blur(var(--glass-blur));
  backdrop-filter:blur(var(--glass-blur));
  border:1px solid rgba(255,255,255,.6);
  border-radius:var(--radius);
  padding:24px 24px 24px 28px;
  box-shadow:var(--shadow);
  border-left:4px solid var(--brand);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.testimonial:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.testimonial p{font-style:italic;color:var(--text-2)}
.testimonial .who{font-size:14px;font-weight:700;color:var(--brand);margin-top:12px}

/* ============ 联系 ============ */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.contact-card{
  background:var(--card);
  -webkit-backdrop-filter:blur(var(--glass-blur));
  backdrop-filter:blur(var(--glass-blur));
  border:1px solid rgba(255,255,255,.6);
  border-radius:var(--radius);
  padding:26px;
  box-shadow:var(--shadow);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);
}
.contact-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.contact-card h3{margin-top:0}
.contact-card ul{list-style:none}
.contact-card li{margin-bottom:10px;font-size:15px;color:var(--text-2)}
.contact-card li strong{color:var(--text);display:inline-block;min-width:76px}

/* ============ 站点地图 ============ */
.sitemap-links{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.sitemap-links ul{list-style:none}
.sitemap-links li{margin-bottom:8px;font-size:14px}
.sitemap-links h4{margin-top:0}

/* ============ 友情链接 ============ */
#links ul{gap:14px !important}
#links a{
  display:inline-block;
  padding:6px 16px;
  border-radius:18px;
  background:var(--card);
  -webkit-backdrop-filter:blur(var(--glass-blur));
  backdrop-filter:blur(var(--glass-blur));
  border:1px solid rgba(255,255,255,.6);
  box-shadow:0 2px 8px rgba(60,20,50,.06);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),color .3s var(--ease);
}
#links a:hover{transform:translateY(-3px);box-shadow:0 8px 18px rgba(194,24,91,.2);text-decoration:none}

/* ============ 页脚 ============ */
footer.site-footer{
  position:relative;
  background:linear-gradient(180deg,#221024 0%,#160a18 100%);
  color:#b9b0bd;
  padding:48px 0 26px;
  margin-top:24px;
  overflow:hidden;
}
footer.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2),#5e35b1,var(--brand));
  background-size:200% 100%;
  animation:heroShift 8s linear infinite;
}
footer.site-footer h4{color:#fff;font-size:16px;margin-bottom:14px;margin-top:0}
footer.site-footer a{color:#b9b0bd;font-size:14px;transition:color .25s var(--ease)}
footer.site-footer a:hover{color:#fff;text-decoration:none}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:30px;
  margin-bottom:30px;
}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:8px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding-top:20px;
  font-size:13px;
  color:#8a828e;
  text-align:center;
  line-height:1.9;
}
.footer-bottom a{font-size:13px;color:#8a828e}
.footer-bottom a:hover{color:#fff}

/* ============ 返回顶部 ============ */
.back-to-top{
  position:fixed;
  right:24px;bottom:24px;
  width:48px;height:48px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;
  border:none;
  cursor:pointer;
  font-size:20px;
  box-shadow:0 8px 24px rgba(194,24,91,.45);
  display:none;
  z-index:999;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.back-to-top.show{display:flex;align-items:center;justify-content:center;animation:popIn .35s var(--ease)}
.back-to-top:hover{transform:translateY(-4px) scale(1.08);box-shadow:0 14px 32px rgba(194,24,91,.6)}
@keyframes popIn{
  from{opacity:0;transform:scale(.6)}
  to{opacity:1;transform:scale(1)}
}

/* ============ 滚动动画 ============ */
.fade-up{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .8s var(--ease),transform .8s var(--ease);
  will-change:opacity,transform;
}
.fade-up.visible{opacity:1;transform:translateY(0)}

@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .fade-up{opacity:1;transform:none}
}

/* ============ 暗色模式 ============ */
body.dark{
  --bg:#0f0d12;
  --bg-2:#18151c;
  --text:#e8e4ec;
  --text-2:#b6aebd;
  --muted:#8a8292;
  --line:rgba(255,255,255,.08);
  --card:rgba(30,26,36,.66);
  --card-solid:#1e1a24;
  --shadow:0 4px 18px rgba(0,0,0,.4);
  --shadow-hover:0 14px 36px rgba(194,24,91,.28);
  background:
    radial-gradient(1200px 600px at 8% -10%,rgba(194,24,91,.16),transparent 60%),
    radial-gradient(1000px 520px at 100% 0%,rgba(123,31,162,.18),transparent 55%),
    linear-gradient(180deg,#0f0d12 0%,#121016 50%,#0c0a10 100%);
  background-attachment:fixed;
  color:var(--text);
}
body.dark header.site-header{
  background:rgba(22,18,28,.72);
  border-bottom-color:rgba(255,255,255,.08);
  box-shadow:0 2px 20px rgba(0,0,0,.5);
}
body.dark .logo{color:#f06292}
body.dark nav.main-nav a{color:var(--text-2)}
body.dark nav.main-nav a:hover{color:#f06292;background:rgba(194,24,91,.14)}
body.dark nav.main-nav{background:rgba(22,18,28,.96)}
body.dark .search-box{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1)}
body.dark .search-box input{color:var(--text)}
body.dark .search-box input::placeholder{color:var(--muted)}
body.dark .icon-btn{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.1);color:var(--text)}
body.dark .icon-btn:hover{background:rgba(255,255,255,.12)}
body.dark h2,body.dark h3,body.dark h4,body.dark p,
body.dark .faq-q,body.dark .stat-item .label,
body.dark .article-item h3,body.dark .case-item h3,
body.dark .team-card .name,body.dark .contact-card li strong{color:var(--text)}
body.dark section.block h2{color:var(--text)}
body.dark section.block{border-color:rgba(255,255,255,.06)}
body.dark .card,
body.dark .article-item,
body.dark .faq-item,
body.dark .team-card,
body.dark .case-item,
body.dark .testimonial,
body.dark .contact-card,
body.dark .stat-item{
  background:var(--card);
  border-color:rgba(255,255,255,.08);
}
body.dark .faq-q{background:transparent}
body.dark .faq-q:hover{background:rgba(194,24,91,.12)}
body.dark .faq-a{color:var(--text-2)}
body.dark .article-item .meta{color:var(--muted)}
body.dark .article-item p{color:var(--text-2)}
body.dark .testimonial p{color:var(--text-2)}
body.dark .contact-card li{color:var(--text-2)}
body.dark .team-card .bio{color:var(--muted)}
body.dark .breadcrumb,body.dark .breadcrumb a{color:var(--muted)}
body.dark .breadcrumb a:hover{color:#f06292}
body.dark #links a{background:var(--card);border-color:rgba(255,255,255,.08)}
body.dark .hero{
  background:linear-gradient(135deg,#8e1450 0%,#5e1a7a 48%,#3a1f7a 100%);
  background-size:200% 200%;
  box-shadow:0 18px 48px rgba(0,0,0,.5);
}
body.dark .banner-carousel{
  background:linear-gradient(135deg,#150a1c 0%,#24102e 55%,#33102e 100%);
  border-color:rgba(255,255,255,.06);
}
body.dark .stat-item .num{
  background:linear-gradient(135deg,#f06292,#ba68c8);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
body.dark .card h3{color:#f06292}
body.dark h3{color:#f06292}
body.dark .case-item .tag{background:rgba(194,24,91,.2);border-color:rgba(194,24,91,.35);color:#f06292}
body.dark .testimonial{border-left-color:#f06292}
body.dark .testimonial .who{color:#f06292}
body.dark .team-card .role{color:#f06292}
body.dark .steps li::before{box-shadow:0 6px 16px rgba(194,24,91,.5)}
body.dark a{color:#f06292}
body.dark a:hover{color:#ba68c8}
body.dark .article-item .read-more{color:#f06292}
body.dark .faq-q .arrow{color:#f06292}
body.dark footer.site-footer{background:linear-gradient(180deg,#0a080c 0%,#050406 100%)}

/* ============ 响应式 ============ */
@media(max-width:1024px){
  nav.main-nav ul{gap:2px}
  nav.main-nav a{font-size:14px;padding:8px 8px}
  .search-box input{width:100px}
  .hero h1{font-size:30px}
}

@media(max-width:900px){
  .grid-3,.grid-2,.article-list,.stats,.team-grid,.contact-grid,.sitemap-links,.footer-grid{
    grid-template-columns:1fr 1fr;
  }
  nav.main-nav{
    display:none;
    position:absolute;
    top:var(--header-h);
    left:0;right:0;
    background:rgba(255,255,255,.96);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    box-shadow:0 12px 30px rgba(0,0,0,.12);
    padding:16px 20px;
    border-bottom:1px solid var(--line);
    animation:slideDown .3s var(--ease);
  }
  nav.main-nav.open{display:block}
  nav.main-nav ul{flex-direction:column;gap:4px}
  nav.main-nav a{display:block;padding:10px 12px;font-size:15px}
  body.dark nav.main-nav{background:rgba(22,18,28,.96)}
  .menu-toggle{display:flex;align-items:center;justify-content:center}
  .search-box{display:none}
  .hero{padding:42px 0 38px;border-radius:0 0 22px 22px}
  .hero h1{font-size:26px}
  .hero p{font-size:16px}
  .banner-slide{padding:30px 24px 54px}
  .banner-slide h2{font-size:22px}
  .banner-dots{left:24px}
  section.block{padding:36px 0}
  .stats{gap:14px}
  .stat-item .num{font-size:28px}
}

@keyframes slideDown{
  from{opacity:0;transform:translateY(-10px)}
  to{opacity:1;transform:translateY(0)}
}

@media(max-width:600px){
  body{font-size:15px}
  .container{padding:0 16px}
  .grid-3,.grid-2,.article-list,.stats,.team-grid,.contact-grid,.sitemap-links,.footer-grid{
    grid-template-columns:1fr;
  }
  .header-inner{gap:10px}
  .logo{font-size:19px}
  .logo svg{width:34px;height:34px}
  .hero h1{font-size:22px;line-height:1.4}
  .hero p{font-size:15px}
  .hero .hero-meta{font-size:13px;gap:8px}
  .hero .hero-meta span{padding:3px 10px}
  .hero-tags a{font-size:12px;padding:6px 13px}
  section.block h2{font-size:22px}
  section.block{padding:30px 0}
  .banner-carousel{min-height:auto;margin:22px 0}
  .banner-slide{padding:26px 20px 50px;min-height:auto}
  .banner-slide h2{font-size:19px}
  .banner-slide p{font-size:14px}
  .banner-dots{left:20px;bottom:16px}
  .card,.article-item,.case-item,.testimonial,.contact-card,.team-card{padding:20px}
  .stat-item .num{font-size:26px}
  .steps li{padding-left:50px}
  .steps li::before{width:36px;height:36px;font-size:14px}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a{padding:0 18px}
  .faq-item.open .faq-a{padding-bottom:16px}
  .back-to-top{right:16px;bottom:16px;width:44px;height:44px}
  footer.site-footer{padding:36px 0 20px}
  .footer-bottom{font-size:12px}
}

@media(max-width:380px){
  .hero h1{font-size:20px}
  .logo span{display:none}
}

/* ============ 打印 ============ */
@media print{
  header.site-header,.back-to-top,.banner-carousel,.hero-tags,.search-box,.icon-btn,.menu-toggle{display:none !important}
  body{background:#fff;color:#000}
  .fade-up{opacity:1;transform:none}
  a{color:#000;text-decoration:underline}
  .card,.article-item,.faq-item,.team-card,.case-item,.testimonial,.contact-card,.stat-item{box-shadow:none;border:1px solid #ccc;background:#fff}
}