*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#ff3d68;
  --primary-dark:#e6224e;
  --accent:#7b2ff7;
  --accent2:#00d4ff;
  --ink:#14172b;
  --ink-2:#3a3f5c;
  --ink-3:#6b7089;
  --bg:#fff8f9;
  --bg-2:#fff;
  --line:#f0dde2;
  --card:#ffffff;
  --radius:18px;
  --shadow:0 10px 30px rgba(230,34,78,.08);
  --shadow-hover:0 18px 44px rgba(230,34,78,.16);
}
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:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
h1,h2,h3,h4{line-height:1.3;font-weight:800;color:var(--ink)}
h2{font-size:clamp(1.5rem,3vw,2.2rem)}
h3{font-size:1.15rem}
.section{padding:72px 0}
.section-head{text-align:center;max-width:760px;margin:0 auto 42px}
.eyebrow{
  display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.14em;
  color:var(--primary-dark);text-transform:uppercase;margin-bottom:12px;
  padding:6px 14px;border-radius:99px;background:rgba(255,61,104,.09);
}
.section-head p{color:var(--ink-3);margin-top:14px;font-size:1rem}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,248,249,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:70px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.ai-page-logo{max-width:100%;height:38px;width:auto}
.brand-name{font-weight:900;font-size:1.15rem;letter-spacing:.02em;color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap}
.nav-links a{
  display:block;padding:10px 13px;font-size:.92rem;font-weight:600;color:var(--ink-2);
  border-radius:10px;transition:color .2s ease,background .2s ease;position:relative;
}
.nav-links a:hover{color:var(--primary-dark);background:rgba(255,61,104,.08)}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:99px;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff!important;
  font-weight:700;font-size:.9rem;box-shadow:0 8px 20px rgba(230,34,78,.28);
  transition:transform .2s ease,box-shadow .2s ease;white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(230,34,78,.36)}
.menu-toggle{
  display:none;background:none;border:1px solid var(--line);border-radius:10px;
  padding:8px 11px;cursor:pointer;color:var(--ink);
}
.menu-toggle svg{display:block;width:22px;height:22px}
.mobile-menu{display:none;width:100%;padding:8px 0 16px;border-top:1px dashed var(--line)}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:11px 8px;font-weight:600;font-size:.95rem;color:var(--ink-2);border-radius:8px}
.mobile-menu a:hover{background:rgba(255,61,104,.08);color:var(--primary-dark)}
.mobile-menu .nav-cta{margin-top:6px;justify-content:center}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(1100px 500px at 12% -10%,rgba(255,61,104,.18),transparent 60%),
    radial-gradient(900px 460px at 92% 0%,rgba(123,47,247,.16),transparent 62%),
    linear-gradient(180deg,#fff3f5 0%,#fff8f9 60%,#fff8f9 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(230,34,78,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(230,34,78,.055) 1px,transparent 1px);
  background-size:54px 54px;
  mask-image:radial-gradient(circle at 50% 30%,#000,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000,transparent 78%);
}
.hero-inner{position:relative;z-index:2;padding:76px 0 84px;text-align:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:99px;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);
  font-size:.82rem;font-weight:700;color:var(--primary-dark);margin-bottom:24px;
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--primary);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}
.hero h1{
  font-size:clamp(1.9rem,5vw,3.3rem);
  letter-spacing:-.01em;
  max-width:900px;margin:0 auto 20px;
}
.hero h1 .hl{
  background:linear-gradient(120deg,var(--primary),var(--accent));
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:var(--primary);
}
.hero-sub{max-width:720px;margin:0 auto 30px;color:var(--ink-2);font-size:clamp(1rem,1.6vw,1.12rem)}
.hero-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-bottom:38px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:99px;font-weight:700;font-size:1rem;cursor:pointer;
  border:none;transition:transform .22s ease,box-shadow .22s ease,background .22s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 12px 28px rgba(230,34,78,.32)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 36px rgba(230,34,78,.4)}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line);box-shadow:var(--shadow)}
.btn-ghost:hover{transform:translateY(-3px);border-color:var(--primary);color:var(--primary-dark)}
.btn:active{transform:scale(.97)}
.hero-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
  max-width:880px;margin:0 auto;
}
.metric{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 12px;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease;
}
.metric:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.metric b{display:block;font-size:clamp(1.3rem,2.6vw,1.75rem);font-weight:900;color:var(--primary-dark);line-height:1.2}
.metric span{font-size:.8rem;color:var(--ink-3);font-weight:600}

/* ===== 关于我们 ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:stretch}
.about-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:34px;box-shadow:var(--shadow);
}
.about-card h3{margin-bottom:14px;font-size:1.3rem}
.about-card p{color:var(--ink-2);margin-bottom:14px;font-size:.98rem}
.about-card p:last-child{margin-bottom:0}
.about-list{display:grid;gap:12px;margin-top:6px}
.about-list li{
  display:flex;gap:12px;align-items:flex-start;font-size:.95rem;color:var(--ink-2);
  padding:12px 14px;border-radius:12px;background:var(--bg);border:1px solid var(--line);
}
.about-list .tick{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:900;
}

/* ===== 服务能力 ===== */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.svc-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);position:relative;overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.svc-card::after{
  content:"";position:absolute;left:0;top:0;height:4px;width:0;
  background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .35s ease;
}
.svc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(255,61,104,.35)}
.svc-card:hover::after{width:100%}
.svc-ico{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(255,61,104,.14),rgba(123,47,247,.14));
  color:var(--primary-dark);margin-bottom:16px;
}
.svc-ico svg{width:24px;height:24px}
.svc-card h3{margin-bottom:8px;font-size:1.05rem}
.svc-card p{font-size:.9rem;color:var(--ink-3)}

/* ===== 一站式制作 / 标签云 ===== */
.tags-wrap{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:1000px;margin:0 auto}
.tag{
  display:inline-flex;align-items:center;padding:10px 18px;border-radius:99px;
  background:#fff;border:1px solid var(--line);font-size:.88rem;font-weight:600;
  color:var(--ink-2);box-shadow:0 4px 12px rgba(230,34,78,.05);
  transition:transform .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.tag:hover{transform:translateY(-3px);color:var(--primary-dark);border-color:var(--primary);box-shadow:0 8px 18px rgba(230,34,78,.16)}

/* ===== 行业方案 ===== */
.solution-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.solution-card{
  display:flex;gap:18px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);
  transition:transform .25s ease,box-shadow .25s ease;
}
.solution-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.sol-num{
  flex-shrink:0;width:44px;height:44px;border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:900;font-size:1rem;
}
.solution-card h3{font-size:1.05rem;margin-bottom:6px}
.solution-card p{font-size:.9rem;color:var(--ink-3)}

/* ===== 服务网络 / 时间线 ===== */
.timeline{position:relative;max-width:820px;margin:0 auto;padding-left:28px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--primary),var(--accent))}
.tl-item{position:relative;padding:0 0 26px 20px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-24px;top:6px;width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--primary);box-shadow:0 0 0 4px rgba(255,61,104,.14);
}
.tl-item h4{font-size:1rem;margin-bottom:4px}
.tl-item p{font-size:.9rem;color:var(--ink-3)}

/* ===== 案例中心 ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease;
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.case-media{aspect-ratio:4/3;background:var(--bg);overflow:hidden}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.case-card:hover .case-media img{transform:scale(1.05)}
.case-body{padding:18px 20px 22px}
.case-body h3{font-size:1rem;margin-bottom:6px}
.case-body p{font-size:.86rem;color:var(--ink-3)}

/* ===== 对比评测 ===== */
.compare-wrap{
  background:linear-gradient(180deg,#fff,#fff5f7);
  border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow);
}
.rating-box{
  display:flex;flex-wrap:wrap;align-items:center;gap:26px;justify-content:center;
  margin-bottom:30px;text-align:center;
}
.score-ring{
  width:130px;height:130px;border-radius:50%;flex-shrink:0;
  background:conic-gradient(var(--primary) 0 354.6deg,rgba(255,61,104,.15) 354.6deg 360deg);
  display:flex;align-items:center;justify-content:center;position:relative;
}
.score-ring::before{content:"";position:absolute;inset:12px;border-radius:50%;background:#fff}
.score-ring span{position:relative;font-size:2rem;font-weight:900;color:var(--primary-dark)}
.rating-meta h3{font-size:1.35rem;margin-bottom:6px}
.stars{color:#ffb400;font-size:1.3rem;letter-spacing:2px;margin-bottom:6px}
.rating-meta p{color:var(--ink-3);font-size:.92rem}
.table-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
table{width:100%;border-collapse:collapse;min-width:620px}
th,td{padding:14px 16px;text-align:left;font-size:.92rem;border-bottom:1px solid var(--line)}
thead th{background:linear-gradient(135deg,rgba(255,61,104,.1),rgba(123,47,247,.1));font-weight:800;color:var(--ink)}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(255,61,104,.04)}
td.us{color:var(--primary-dark);font-weight:700}
.badge-best{display:inline-block;padding:2px 10px;border-radius:99px;background:var(--primary);color:#fff;font-size:.74rem;font-weight:800;margin-left:6px}

/* ===== 用户评论 ===== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.review-quote{color:var(--ink-2);font-size:.93rem;flex:1}
.review-user{display:flex;align-items:center;gap:12px;border-top:1px dashed var(--line);padding-top:14px}
.avatar{
  width:42px;height:42px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem;
}
.review-user b{display:block;font-size:.92rem}
.review-user span{font-size:.78rem;color:var(--ink-3)}

/* ===== 价格 / Token 比价 ===== */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.price-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.price-card.featured{border:2px solid var(--primary);position:relative}
.price-card.featured .ribbon{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;
  font-size:.74rem;font-weight:800;padding:4px 14px;border-radius:99px;white-space:nowrap;
}
.price-card h3{font-size:1.1rem}
.price{font-size:1.8rem;font-weight:900;color:var(--primary-dark);line-height:1.2}
.price small{font-size:.82rem;color:var(--ink-3);font-weight:600}
.price-card ul{display:grid;gap:8px;font-size:.88rem;color:var(--ink-2)}
.price-card li::before{content:"◆";color:var(--primary);font-size:.7rem;margin-right:8px}

/* ===== 需求匹配 / 表单 ===== */
.form-wrap{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:26px;align-items:stretch;
}
.form-info{
  background:linear-gradient(150deg,#fff,#fff2f5);
  border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);
}
.form-info h3{font-size:1.3rem;margin-bottom:14px}
.form-info p{color:var(--ink-2);font-size:.94rem;margin-bottom:18px}
.contact-list{display:grid;gap:12px}
.contact-list li{display:flex;gap:10px;font-size:.9rem;color:var(--ink-2);align-items:flex-start}
.contact-list .k{color:var(--ink-3);flex-shrink:0;min-width:74px;font-weight:600}
.contact-list a{color:var(--primary-dark);font-weight:700;word-break:break-all}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:.85rem;font-weight:700;color:var(--ink-2)}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:11px;
  font-size:.92rem;font-family:inherit;color:var(--ink);background:var(--bg);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(255,61,104,.14);
}
.field textarea{resize:vertical;min-height:100px}
.form-card .btn{width:100%;margin-top:4px}
.qr-box{display:flex;gap:16px;align-items:center;margin-top:18px;flex-wrap:wrap}
.qr-box img{width:110px;height:110px;object-fit:cover;border-radius:12px;border:1px solid var(--line);background:#fff}
.qr-box div{font-size:.85rem;color:var(--ink-3)}
.qr-box div b{display:block;color:var(--ink);font-size:.92rem;margin-bottom:4px}

/* ===== 文章列表 ===== */
.article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.article-card{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(255,61,104,.35)}
.article-card h3{font-size:1rem;margin-bottom:8px;color:var(--ink)}
.article-card p{font-size:.86rem;color:var(--ink-3)}
.article-card .more{display:inline-block;margin-top:12px;font-size:.84rem;font-weight:700;color:var(--primary-dark)}

/* ===== FAQ ===== */
.faq-list{max-width:880px;margin:0 auto;display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 4px 14px rgba(230,34,78,.05);transition:box-shadow .25s ease}
.faq-item:hover{box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:18px 22px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:.98rem;font-weight:700;color:var(--ink);font-family:inherit;
}
.faq-q .plus{flex-shrink:0;width:24px;height:24px;border-radius:50%;background:rgba(255,61,104,.1);color:var(--primary-dark);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:1rem;transition:transform .3s ease,background .3s ease}
.faq-item.open .faq-q .plus{transform:rotate(45deg);background:var(--primary);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 22px 18px;color:var(--ink-3);font-size:.9rem}

/* ===== 帮助中心 / 百科 ===== */
.kb-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.kb-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease;
}
.kb-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.kb-card h3{font-size:1rem;margin-bottom:8px}
.kb-card p{font-size:.88rem;color:var(--ink-3)}

/* ===== 联系我们 ===== */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);text-align:center;
}
.contact-card h3{font-size:1rem;margin-bottom:8px}
.contact-card p{font-size:.9rem;color:var(--ink-3);word-break:break-all}
.contact-card a{color:var(--primary-dark);font-weight:700}

/* ===== 加盟代理 ===== */
.join-wrap{
  background:linear-gradient(140deg,#fff5f7,#f7f1ff 55%,#eefaff);
  border:1px solid var(--line);border-radius:22px;padding:44px 34px;text-align:center;
  box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.join-wrap::before{
  content:"";position:absolute;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,61,104,.16),transparent 70%);
  top:-120px;right:-80px;pointer-events:none;
}
.join-wrap h2{margin-bottom:14px;position:relative}
.join-wrap p{max-width:700px;margin:0 auto 24px;color:var(--ink-2);position:relative}
.join-points{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:26px;position:relative}
.join-points span{
  background:#fff;border:1px solid var(--line);border-radius:99px;padding:8px 18px;
  font-size:.86rem;font-weight:600;color:var(--ink-2);box-shadow:0 4px 12px rgba(230,34,78,.06);
}
.join-wrap .btn{position:relative}

/* ===== 浮动客服 ===== */
.float-kf{
  position:fixed;right:20px;bottom:88px;z-index:90;
  display:flex;flex-direction:column;gap:12px;align-items:center;
}
.kf-btn{
  width:52px;height:52px;border-radius:50%;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;
  display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(230,34,78,.34);
  transition:transform .22s ease,box-shadow .22s ease;
}
.kf-btn:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 14px 30px rgba(230,34,78,.44)}
.kf-btn svg{width:24px;height:24px}
.kf-panel{
  position:fixed;right:20px;bottom:152px;z-index:91;width:246px;
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;
  box-shadow:0 20px 50px rgba(230,34,78,.2);display:none;
}
.kf-panel.open{display:block;animation:fadeUp .25s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.kf-panel h4{font-size:.95rem;margin-bottom:4px}
.kf-panel p{font-size:.8rem;color:var(--ink-3);margin-bottom:12px}
.kf-panel img{width:100%;border-radius:10px;border:1px solid var(--line)}
.kf-panel .kf-line{display:flex;justify-content:space-between;font-size:.82rem;margin-top:10px;color:var(--ink-2)}
.kf-panel .kf-line a{color:var(--primary-dark);font-weight:700}
.back-top{
  position:fixed;left:20px;bottom:24px;z-index:90;width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transition:opacity .25s ease,transform .25s ease,visibility .25s;
}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-3px);color:var(--primary-dark)}

/* ===== 页脚 ===== */
.site-footer{background:#171a2e;color:#c9cde0;padding:52px 0 0;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:30px;padding-bottom:34px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .ai-page-logo{height:34px;filter:brightness(0) invert(1)}
.footer-brand b{color:#fff;font-size:1.05rem}
.site-footer p{font-size:.86rem;color:#a3a9c2;line-height:1.75}
.footer-col h4{font-size:.92rem;color:#fff;margin-bottom:14px;font-weight:800}
.footer-col ul{display:grid;gap:9px}
.footer-col a,.footer-col span{font-size:.86rem;color:#a3a9c2;transition:color .2s ease}
.footer-col a:hover{color:#ff8ba4}
.footer-links{display:flex;flex-wrap:wrap;gap:10px 18px}
.footer-links a{font-size:.82rem;color:#a3a9c2}
.footer-links a:hover{color:#ff8ba4}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:18px 0;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  font-size:.8rem;color:#8d94b0;
}
.footer-bottom a{color:#c9cde0}
.footer-bottom a:hover{color:#ff8ba4}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .svc-grid,.case-grid,.review-grid,.price-grid,.kb-grid,.contact-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:860px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .menu-toggle{display:inline-flex}
  .about-grid,.form-wrap,.solution-grid{grid-template-columns:1fr}
  .hero-inner{padding:56px 0 64px}
  .hero-metrics{grid-template-columns:repeat(2,1fr)}
  .article-grid{grid-template-columns:1fr}
  .section{padding:56px 0}
}
@media (max-width:600px){
  .svc-grid,.case-grid,.review-grid,.price-grid,.kb-grid,.contact-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .container{padding:0 16px}
  .about-card,.form-info,.form-card,.compare-wrap{padding:24px}
  .join-wrap{padding:32px 20px}
  .hero-actions .btn{width:100%}
  .float-kf{right:14px;bottom:76px}
  .kf-panel{right:14px;width:calc(100% - 28px);max-width:280px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
}