:root{
  --ink:#1a2332;
  --ink-soft:#4a5568;
  --ink-mute:#718096;
  --brand:#6c5ce7;
  --brand-2:#00b8a9;
  --brand-3:#ff6b6b;
  --brand-4:#feca57;
  --brand-5:#54a0ff;
  --bg:#fdfbff;
  --bg-soft:#f5f2ff;
  --card:#ffffff;
  --line:#e8e4f3;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 8px 30px rgba(108,92,231,.10);
  --shadow-lg:0 18px 50px rgba(108,92,231,.16);
  --container:1160px;
  --gap:24px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at 6% 4%, rgba(108,92,231,.10), transparent 34%),
    radial-gradient(circle at 94% 10%, rgba(0,184,169,.10), transparent 32%),
    radial-gradient(circle at 84% 70%, rgba(255,107,107,.08), transparent 36%),
    radial-gradient(circle at 12% 88%, rgba(84,160,255,.08), transparent 34%),
    var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}
section{padding:72px 0}
.section-head{
  max-width:760px;
  margin:0 auto 44px;
  text-align:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--brand);
  background:rgba(108,92,231,.10);
  border:1px solid rgba(108,92,231,.22);
  border-radius:999px;
  padding:6px 16px;
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:7px;height:7px;border-radius:50%;
  background:var(--brand-2);
  box-shadow:0 0 0 3px rgba(0,184,169,.20);
}
h1{
  font-size:clamp(28px,5vw,46px);
  line-height:1.22;
  letter-spacing:-.02em;
  font-weight:800;
}
h2{
  font-size:clamp(24px,3.4vw,34px);
  line-height:1.3;
  letter-spacing:-.01em;
  font-weight:800;
}
h3{font-size:19px;line-height:1.4;font-weight:700}
p{color:var(--ink-soft)}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--ink-mute);font-size:15px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(253,251,255,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:68px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand img{width:auto;max-height:40px;max-width:150px;object-fit:contain}
.brand-name{
  font-weight:800;
  font-size:18px;
  letter-spacing:-.01em;
  background:linear-gradient(112deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:0;
  flex-wrap:wrap;
}
.nav-links a{
  display:block;
  font-size:14px;
  font-weight:600;
  color:var(--ink-soft);
  padding:8px 12px;
  border-radius:10px;
  transition:color .18s,background .18s;
  white-space:nowrap;
}
.nav-links a:hover{color:var(--brand);background:rgba(108,92,231,.08)}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:14px;
  font-weight:700;
  border-radius:var(--radius-sm);
  padding:11px 22px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s,box-shadow .18s,background .18s,color .18s;
  white-space:nowrap;
}
.btn:active{transform:scale(.96)}
.btn-primary{
  background:linear-gradient(112deg,var(--brand),var(--brand-5));
  color:#fff;
  box-shadow:0 8px 22px rgba(108,92,231,.32);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(108,92,231,.42)}
.btn-ghost{
  background:rgba(255,255,255,.9);
  color:var(--brand);
  border-color:rgba(108,92,231,.28);
}
.btn-ghost:hover{background:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-teal{
  background:linear-gradient(112deg,var(--brand-2),#3dd6c4);
  color:#fff;
  box-shadow:0 8px 22px rgba(0,184,169,.30);
}
.btn-teal:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,184,169,.40)}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  border-radius:10px;
  background:#fff;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle span{
  display:block;width:20px;height:2px;border-radius:2px;
  background:var(--ink);
  transition:transform .22s,opacity .22s;
}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:70px 0 64px;
  overflow:hidden;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:48px;
  align-items:center;
}
.hero-copy .eyebrow{margin-bottom:20px}
.hero-copy h1{margin-bottom:20px}
.hero-copy h1 .hl{
  background:linear-gradient(112deg,var(--brand),var(--brand-2) 55%,var(--brand-5));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  font-size:16px;
  color:var(--ink-soft);
  max-width:560px;
  margin-bottom:28px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-tags{
  display:flex;flex-wrap:wrap;gap:10px;
}
.hero-tags span{
  font-size:13px;font-weight:600;color:var(--ink-soft);
  background:rgba(255,255,255,.85);
  border:1px solid var(--line);
  border-radius:999px;
  padding:6px 14px;
  transition:transform .18s,border-color .18s;
}
.hero-tags span:hover{transform:translateY(-2px);border-color:rgba(108,92,231,.4)}
.hero-visual{
  position:relative;
  display:grid;
  gap:16px;
  grid-template-columns:1fr 1fr;
}
.hv-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px 18px;
  box-shadow:var(--shadow);
  animation:floatY 6s ease-in-out infinite;
}
.hv-card:nth-child(2){animation-delay:-2s}
.hv-card:nth-child(3){animation-delay:-4s;grid-column:span 2}
.hv-card:nth-child(3){display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:center}
.hv-icon{
  width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;
}
.hv-card h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:2px}
.hv-card p{font-size:12px;color:var(--ink-mute);line-height:1.5}
.hv-1 .hv-icon{background:rgba(108,92,231,.14);color:var(--brand)}
.hv-2 .hv-icon{background:rgba(0,184,169,.14);color:var(--brand-2)}
.hv-3 .hv-icon{background:rgba(255,107,107,.14);color:var(--brand-3)}
.hv-3 .hv-icon{width:46px;height:46px;font-size:20px}
.hv-3 h4{font-size:15px}
.hv-3 p{font-size:13px}
@keyframes floatY{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-8px)}
}

/* ============ 数据指标 ============ */
.metrics{
  padding:0 0 64px;
}
.metrics-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:var(--gap);
}
.metric{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px 22px;
  text-align:center;
  box-shadow:var(--shadow);
  transition:transform .2s,box-shadow .2s;
}
.metric:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.metric .num{
  font-size:clamp(26px,3.6vw,36px);
  font-weight:800;
  letter-spacing:-.02em;
  background:linear-gradient(112deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  line-height:1.2;
}
.metric .lbl{font-size:13px;color:var(--ink-mute);margin-top:6px;font-weight:600}

/* ============ 关于我们 ============ */
.about-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:start;
}
.about-text h2{margin-bottom:18px}
.about-text p{margin-bottom:14px;font-size:15px}
.about-list{display:grid;gap:14px;margin-top:20px}
.about-item{
  display:flex;gap:14px;align-items:flex-start;
  background:rgba(255,255,255,.75);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:16px 18px;
  transition:transform .18s,border-color .18s;
}
.about-item:hover{transform:translateX(4px);border-color:rgba(108,92,231,.35)}
.about-item .dot{
  flex-shrink:0;width:10px;height:10px;border-radius:50%;
  background:var(--brand-2);margin-top:7px;
  box-shadow:0 0 0 4px rgba(0,184,169,.16);
}
.about-item strong{display:block;font-size:15px;margin-bottom:2px}
.about-item span{font-size:13px;color:var(--ink-mute)}
.about-visual{
  display:grid;gap:16px;grid-template-columns:1fr 1fr;
}
.about-visual img{
  border-radius:var(--radius);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  width:100%;
  transition:transform .25s;
}
.about-visual img:hover{transform:scale(1.03)}
.about-visual .wide{grid-column:span 2}

/* ============ 服务能力 ============ */
.services-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:var(--gap);
}
.svc-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px 24px;
  box-shadow:var(--shadow);
  transition:transform .22s,box-shadow .22s,border-color .22s;
  position:relative;
  overflow:hidden;
}
.svc-card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  opacity:0;
  transition:opacity .22s;
}
.svc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(108,92,231,.3)}
.svc-card:hover::before{opacity:1}
.svc-icon{
  width:48px;height:48px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:22px;margin-bottom:16px;
}
.svc-card:nth-child(1) .svc-icon{background:rgba(108,92,231,.13);color:var(--brand)}
.svc-card:nth-child(2) .svc-icon{background:rgba(0,184,169,.13);color:var(--brand-2)}
.svc-card:nth-child(3) .svc-icon{background:rgba(255,107,107,.13);color:var(--brand-3)}
.svc-card:nth-child(4) .svc-icon{background:rgba(84,160,255,.13);color:var(--brand-5)}
.svc-card:nth-child(5) .svc-icon{background:rgba(254,202,87,.18);color:#b8860b}
.svc-card:nth-child(6) .svc-icon{background:rgba(108,92,231,.10);color:var(--brand)}
.svc-card h3{margin-bottom:8px}
.svc-card p{font-size:14px;color:var(--ink-mute);line-height:1.65}

/* ============ 场景标签云 ============ */
.scene-tags{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:center;
}
.scene-tags span{
  font-size:14px;font-weight:600;
  color:var(--ink-soft);
  background:#fff;
  border:1px solid var(--line);
  border-radius:999px;
  padding:9px 18px;
  box-shadow:0 2px 10px rgba(108,92,231,.06);
  transition:transform .18s,color .18s,border-color .18s,box-shadow .18s;
  cursor:default;
}
.scene-tags span:hover{
  transform:translateY(-3px);
  color:var(--brand);
  border-color:rgba(108,92,231,.4);
  box-shadow:0 8px 20px rgba(108,92,231,.16);
}

/* ============ 模型合作 ============ */
.models-strip{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:center;
}
.models-strip span{
  font-size:13px;font-weight:700;color:var(--ink-soft);
  background:rgba(255,255,255,.8);
  border:1px solid var(--line);
  border-radius:8px;
  padding:8px 14px;
  transition:background .18s,color .18s;
}
.models-strip span:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

/* ============ 流程步骤 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:var(--gap);
  counter-reset:step;
}
.step{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px 22px;
  box-shadow:var(--shadow);
  transition:transform .2s;
}
.step:hover{transform:translateY(-5px)}
.step-num{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;color:#fff;
  background:linear-gradient(112deg,var(--brand),var(--brand-5));
  margin-bottom:16px;
  box-shadow:0 6px 16px rgba(108,92,231,.30);
}
.step:nth-child(2) .step-num{background:linear-gradient(112deg,var(--brand-2),#3dd6c4);box-shadow:0 6px 16px rgba(0,184,169,.30)}
.step:nth-child(3) .step-num{background:linear-gradient(112deg,var(--brand-3),#ff9a76);box-shadow:0 6px 16px rgba(255,107,107,.30)}
.step:nth-child(4) .step-num{background:linear-gradient(112deg,var(--brand-5),#7cc0ff);box-shadow:0 6px 16px rgba(84,160,255,.30)}
.step h3{font-size:16px;margin-bottom:8px}
.step p{font-size:13px;color:var(--ink-mute)}

/* ============ 案例中心 ============ */
.case-grid{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:var(--gap);
  align-items:stretch;
}
.case-main{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:box-shadow .22s,transform .22s;
  display:flex;flex-direction:column;
}
.case-main:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.case-main .case-img{overflow:hidden}
.case-main .case-img img{width:100%;transition:transform .4s}
.case-main:hover .case-img img{transform:scale(1.04)}
.case-body{padding:24px}
.case-body .tag{
  display:inline-block;font-size:12px;font-weight:700;
  color:var(--brand);background:rgba(108,92,231,.10);
  border-radius:6px;padding:4px 10px;margin-bottom:10px;
}
.case-body h3{margin-bottom:8px}
.case-body p{font-size:14px;color:var(--ink-mute)}
.case-side{display:grid;gap:var(--gap)}
.case-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  display:grid;grid-template-columns:150px 1fr;overflow:hidden;
  box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;
}
.case-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.case-item img{width:100%;height:100%;object-fit:cover}
.case-item .case-item-body{padding:18px 20px;display:flex;flex-direction:column;justify-content:center}
.case-item h4{font-size:15px;font-weight:700;margin-bottom:4px}
.case-item p{font-size:13px;color:var(--ink-mute)}

/* ============ 对比评测 ============ */
.compare-wrap{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-lg);
  overflow:hidden;
}
.compare-top{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:20px;padding:28px 30px;
  background:linear-gradient(112deg,rgba(108,92,231,.08),rgba(0,184,169,.08));
  border-bottom:1px solid var(--line);
}
.score-box{display:flex;align-items:center;gap:16px}
.score-num{
  font-size:44px;font-weight:800;line-height:1;
  background:linear-gradient(112deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.score-meta .stars{color:#f5a623;font-size:18px;letter-spacing:2px}
.score-meta .lbl{font-size:13px;color:var(--ink-mute);font-weight:600}
.compare-top .rec{
  font-size:14px;font-weight:700;color:var(--brand-2);
  background:rgba(0,184,169,.12);border:1px solid rgba(0,184,169,.3);
  border-radius:999px;padding:8px 18px;
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;min-width:640px}
th,td{
  padding:15px 18px;text-align:left;font-size:14px;
  border-bottom:1px solid var(--line);
}
th{
  background:rgba(108,92,231,.06);
  font-weight:700;color:var(--ink);
  white-space:nowrap;
}
td:first-child{font-weight:600;color:var(--ink)}
td.hl-cell{color:var(--brand);font-weight:600}
tbody tr{transition:background .16s}
tbody tr:hover{background:rgba(108,92,231,.04)}

/* ============ 评论 ============ */
.review-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:var(--gap);
}
.review{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow);
  transition:transform .2s,box-shadow .2s;
  display:flex;flex-direction:column;
}
.review:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.review-stars{color:#f5a623;font-size:15px;letter-spacing:1px;margin-bottom:12px}
.review p{font-size:14px;color:var(--ink-soft);flex:1;line-height:1.7}
.review-user{
  display:flex;align-items:center;gap:12px;margin-top:18px;
  padding-top:16px;border-top:1px solid var(--line);
}
.avatar{
  width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;color:#fff;flex-shrink:0;
}
.review:nth-child(1) .avatar{background:linear-gradient(135deg,#6c5ce7,#54a0ff)}
.review:nth-child(2) .avatar{background:linear-gradient(135deg,#00b8a9,#3dd6c4)}
.review:nth-child(3) .avatar{background:linear-gradient(135deg,#ff6b6b,#ff9a76)}
.review:nth-child(4) .avatar{background:linear-gradient(135deg,#54a0ff,#7cc0ff)}
.review:nth-child(5) .avatar{background:linear-gradient(135deg,#feca57,#ff9f43)}
.review:nth-child(6) .avatar{background:linear-gradient(135deg,#6c5ce7,#00b8a9)}
.review-user strong{display:block;font-size:14px}
.review-user span{font-size:12px;color:var(--ink-mute)}

/* ============ 文章 & 资讯 ============ */
.article-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap);
}
.article{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
  transition:transform .2s,box-shadow .2s,border-color .2s;
  display:flex;flex-direction:column;
}
.article:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:rgba(108,92,231,.3)}
.article .a-date{font-size:12px;font-weight:700;color:var(--brand-2);margin-bottom:10px}
.article h3{font-size:16px;margin-bottom:8px}
.article p{font-size:13px;color:var(--ink-mute);flex:1}
.article .a-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:700;color:var(--brand);margin-top:14px;
}
.article .a-link::after{content:"→";transition:transform .18s}
.article:hover .a-link::after{transform:translateX(4px)}

/* ============ 表单 ============ */
.contact-grid{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;align-items:start;
}
.contact-info{display:grid;gap:14px}
.info-item{
  display:flex;gap:14px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 18px;box-shadow:var(--shadow);
  transition:transform .18s;
}
.info-item:hover{transform:translateX(4px)}
.info-icon{
  width:40px;height:40px;border-radius:10px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(108,92,231,.10);color:var(--brand);font-size:17px;font-weight:800;
}
.info-item .lbl{font-size:12px;color:var(--ink-mute);font-weight:600}
.info-item .val{font-size:14px;font-weight:700;color:var(--ink);word-break:break-all}
.qr-box{
  display:flex;align-items:center;gap:16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 18px;box-shadow:var(--shadow);
}
.qr-box img{width:84px;height:84px;object-fit:contain;border-radius:10px;border:1px solid var(--line)}
.qr-box .qr-txt strong{display:block;font-size:14px;margin-bottom:4px}
.qr-box .qr-txt span{font-size:12px;color:var(--ink-mute)}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow-lg);
}
.form-card h3{margin-bottom:6px}
.form-card .form-sub{font-size:13px;color:var(--ink-mute);margin-bottom:22px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:var(--ink)}
.field input,.field select,.field textarea{
  width:100%;font-family:inherit;font-size:14px;color:var(--ink);
  background:#faf9ff;border:1px solid var(--line);border-radius:10px;
  padding:12px 14px;transition:border-color .18s,box-shadow .18s;
  outline:none;
}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px rgba(108,92,231,.14);background:#fff;
}
.field textarea{resize:vertical;min-height:104px}
.form-btn{width:100%;padding:14px;font-size:15px;margin-top:4px}

/* ============ FAQ ============ */
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:12px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  overflow:hidden;box-shadow:0 2px 12px rgba(108,92,231,.05);
  transition:box-shadow .18s,border-color .18s;
}
.faq-item.open{border-color:rgba(108,92,231,.35);box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:none;border:none;cursor:pointer;
  font-family:inherit;font-size:15px;font-weight:700;color:var(--ink);text-align:left;
}
.faq-q .icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(108,92,231,.10);color:var(--brand);
  font-size:16px;font-weight:700;transition:transform .22s,background .22s,color .22s;
}
.faq-item.open .faq-q .icon{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease,padding .3s ease;
  padding:0 22px;
}
.faq-item.open .faq-a{max-height:320px;padding:0 22px 20px}
.faq-a p{font-size:14px;color:var(--ink-mute);line-height:1.75}

/* ============ 友情链接 ============ */
.friend-links{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:center;
}
.friend-links a{
  font-size:13px;font-weight:600;color:var(--ink-soft);
  background:#fff;border:1px solid var(--line);border-radius:8px;
  padding:8px 16px;transition:color .18s,border-color .18s,transform .18s;
}
.friend-links a:hover{color:var(--brand);border-color:rgba(108,92,231,.4);transform:translateY(-2px)}

/* ============ Footer ============ */
.site-footer{
  background:#1a2332;
  color:#c9d2e3;
  padding:52px 0 24px;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;
  padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.10);
}
.footer-brand .brand-name{font-size:20px;margin-bottom:12px;display:inline-block}
.footer-brand p{color:#94a3b8;font-size:13px;line-height:1.8;margin-bottom:16px}
.footer-brand .btn{padding:9px 20px;font-size:13px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:#94a3b8;font-size:13px;transition:color .18s}
.footer-col a:hover{color:#fff}
.footer-col p{color:#94a3b8;font-size:13px;line-height:1.9}
.footer-bottom{
  padding-top:22px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px;
}
.footer-bottom p{color:#7b8aa0;font-size:12px}
.footer-bottom-links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom-links a{color:#94a3b8;font-size:12px}
.footer-bottom-links a:hover{color:#fff}
.footer-friend{
  display:flex;flex-wrap:wrap;gap:8px 18px;
  padding-bottom:22px;margin-bottom:22px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-friend a{color:#94a3b8;font-size:12px;transition:color .18s}
.footer-friend a:hover{color:#fff}

/* ============ 浮动客服 ============ */
.float-kf{
  position:fixed;right:20px;bottom:24px;z-index:90;
  display:flex;flex-direction:column;gap:10px;
}
.float-btn{
  width:50px;height:50px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);
  box-shadow:0 6px 22px rgba(26,35,50,.16);
  cursor:pointer;font-size:20px;color:var(--brand);
  transition:transform .2s,box-shadow .2s;
}
.float-btn:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 10px 28px rgba(26,35,50,.24)}
.float-btn.kf{background:linear-gradient(135deg,var(--brand),var(--brand-5));color:#fff;border:none}
.kf-pop{
  position:absolute;right:62px;bottom:0;
  width:220px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:16px;
  box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s,transform .22s,visibility .22s;
  text-align:center;
}
.kf-pop.show{opacity:1;visibility:visible;transform:translateY(0)}
.kf-pop img{width:150px;height:150px;object-fit:contain;margin:0 auto 10px;border-radius:8px;border:1px solid var(--line)}
.kf-pop p{font-size:12px;color:var(--ink-mute);line-height:1.6}
.kf-pop strong{display:block;font-size:13px;color:var(--ink);margin-bottom:6px}
#backTop{
  position:fixed;right:20px;bottom:140px;z-index:90;
  width:50px;height:50px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);
  box-shadow:0 6px 22px rgba(26,35,50,.16);
  cursor:pointer;color:var(--brand);font-size:18px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s,transform .24s,visibility .24s;
}
#backTop.show{opacity:1;visibility:visible;transform:translateY(0)}
#backTop:hover{transform:translateY(-3px)}

/* ============ 滚动渐入 ============ */
.reveal{
  opacity:0;transform:translateY(24px);
  transition:opacity .6s ease,transform .6s ease;
}
.reveal.in{opacity:1;transform:translateY(0)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{max-width:520px}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .article-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
  .nav-links.open{
    display:flex;flex-direction:column;align-items:flex-start;
    position:absolute;top:100%;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    padding:12px 20px 18px;gap:0;
    box-shadow:0 12px 30px rgba(26,35,50,.10);
  }
  .nav-links.open a{padding:11px 0;width:100%;font-size:15px}
  .nav-toggle{display:flex}
  .nav-wrap{position:relative}
}
@media (max-width:720px){
  section{padding:52px 0}
  .hero{padding:48px 0 40px}
  .metrics-grid{grid-template-columns:1fr 1fr;gap:14px}
  .metric{padding:20px 14px}
  .services-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .article-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .case-item{grid-template-columns:1fr}
  .case-item img{height:160px}
  .footer-grid{grid-template-columns:1fr}
  .hero-visual{grid-template-columns:1fr}
  .hv-card:nth-child(3){grid-column:span 1}
  .compare-top{padding:22px}
  .score-num{font-size:36px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:420px){
  .metrics-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}