:root{
  --ink:#0e1330;
  --ink-soft:#3a4160;
  --brand:#ff3d68;
  --brand-2:#ff7a18;
  --brand-3:#1b3bff;
  --cyan:#00d1ff;
  --lime:#c8ff2e;
  --bg:#f5f6fb;
  --card:#ffffff;
  --line:#e7e9f4;
  --radius:18px;
  --shadow:0 10px 30px rgba(18,26,63,.08);
  --shadow-hover:0 18px 44px rgba(18,26,63,.16);
}
*{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","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:88px 0}
.section.alt{background:#fff}
.section-head{max-width:760px;margin:0 auto 48px;text-align:center}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--brand);text-transform:uppercase;padding:6px 14px;border-radius:999px;
  background:rgba(255,61,104,.09);margin-bottom:16px;
}
.section-head h2{font-size:34px;line-height:1.28;letter-spacing:-.02em;margin-bottom:14px}
.section-head p{color:var(--ink-soft);font-size:16px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:999px;font-size:15px;font-weight:700;
  border:none;cursor:pointer;transition:transform .22s ease,box-shadow .22s ease,background .22s ease;
  font-family:inherit;white-space:nowrap;
}
.btn:active{transform:scale(.97)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 12px 28px rgba(255,61,104,.35)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 36px rgba(255,61,104,.45)}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfd4ea}
.btn-lime{background:var(--lime);color:#10210a}
.btn-lime:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(200,255,46,.4)}

/* ===== 顶部导航 ===== */
.topbar{
  background:linear-gradient(90deg,var(--ink),#1c2450);
  color:#cfd6f5;font-size:13px;
}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:38px;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.topbar a{color:#fff;font-weight:600}
.topbar .tb-right{display:flex;gap:18px;flex-wrap:wrap}
header.site-header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line);
  transition:box-shadow .3s ease;
}
header.site-header.scrolled{box-shadow:0 8px 26px rgba(18,26,63,.08)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand .ai-page-logo{height:42px;width:auto;object-fit:contain}
.brand-txt{display:flex;flex-direction:column;line-height:1.2}
.brand-txt strong{font-size:18px;letter-spacing:-.01em}
.brand-txt span{font-size:11px;color:var(--ink-soft);letter-spacing:.08em}
.nav-links{display:flex;align-items:center;gap:0}
.nav-links a{
  display:block;padding:8px 12px;font-size:14px;font-weight:600;color:var(--ink-soft);
  border-radius:8px;transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--brand);background:rgba(255,61,104,.07)}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-cta .btn{padding:10px 20px;font-size:13px}
.burger{display:none;width:44px;height:44px;border:none;background:#fff;border-radius:12px;border:1px solid var(--line);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.burger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.burger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.active span:nth-child(2){opacity:0}
.burger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(1100px 520px at 12% -10%,rgba(27,59,255,.55),transparent 60%),
    radial-gradient(900px 520px at 88% 8%,rgba(255,61,104,.5),transparent 60%),
    linear-gradient(150deg,#0b1030 0%,#131a44 55%,#0c1330 100%);
  padding:96px 0 100px;
}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;pointer-events:none}
.hero::before{width:520px;height:520px;right:-160px;top:-200px;background:radial-gradient(circle,rgba(0,209,255,.28),transparent 65%)}
.hero::after{width:420px;height:420px;left:-140px;bottom:-200px;background:radial-gradient(circle,rgba(200,255,46,.16),transparent 65%)}
.grid-lines{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  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;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  padding:8px 16px;border-radius:999px;background:rgba(255,255,255,.09);
  border:1px solid rgba(255,255,255,.18);color:#dfe6ff;margin-bottom:22px;
}
.hero-tag i{width:8px;height:8px;border-radius:50%;background:var(--lime);box-shadow:0 0 12px var(--lime)}
.hero h1{font-size:46px;line-height:1.2;letter-spacing:-.02em;margin-bottom:20px}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--lime),#7ef0ff 55%,#ffb0c4);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p.lead{font-size:17px;color:#c3cbe8;max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero-actions .btn{padding:16px 34px;font-size:16px}
.hero-actions .btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.24)}
.hero-actions .btn-ghost:hover{background:rgba(255,255,255,.16)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:640px}
.hstat{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:14px;padding:16px 14px;text-align:left;
  transition:transform .25s ease,background .25s ease;
}
.hstat:hover{transform:translateY(-4px);background:rgba(255,255,255,.1)}
.hstat strong{display:block;font-size:24px;letter-spacing:-.02em;color:#fff}
.hstat span{font-size:12px;color:#a9b4dd}
.hero-panel{
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.15);
  border-radius:22px;padding:26px;backdrop-filter:blur(8px);
  box-shadow:0 30px 60px rgba(0,0,0,.28);
}
.hero-panel h3{font-size:16px;margin-bottom:16px;color:#fff;font-weight:700;letter-spacing:.02em}
.chip-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.chip{
  font-size:12px;padding:6px 12px;border-radius:999px;font-weight:600;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);color:#dbe2ff;
  transition:transform .2s ease,background .2s ease;
}
.chip:hover{transform:translateY(-2px);background:rgba(255,61,104,.35);border-color:rgba(255,61,104,.5)}
.mini-flow{display:flex;flex-direction:column;gap:10px}
.mini-flow li{display:flex;align-items:center;gap:12px;font-size:13.5px;color:#cdd5f2}
.dot-num{
  width:26px;height:26px;flex-shrink:0;border-radius:8px;display:grid;place-items:center;
  font-size:12px;font-weight:800;color:#0b1030;background:linear-gradient(135deg,var(--lime),#8cf7d0);
}
.pulse{animation:pulse 3.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.6}50%{opacity:1}}

/* ===== 通用卡片 ===== */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:#d8dcf0}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 数据指标 ===== */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.metric{
  border-radius:var(--radius);padding:30px 24px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow);position:relative;overflow:hidden;
  transition:transform .28s ease,box-shadow .28s ease;
}
.metric:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.metric::after{content:"";position:absolute;right:-40px;top:-40px;width:110px;height:110px;border-radius:50%;background:linear-gradient(135deg,rgba(255,61,104,.14),rgba(27,59,255,.12))}
.metric b{display:block;font-size:36px;letter-spacing:-.03em;background:linear-gradient(120deg,var(--brand),var(--brand-3));-webkit-background-clip:text;background-clip:text;color:transparent}
.metric span{font-size:14px;color:var(--ink-soft);font-weight:600}

/* ===== 服务能力 ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.svc-card{position:relative;overflow:hidden}
.svc-icon{
  width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(135deg,rgba(255,61,104,.14),rgba(255,122,24,.12));color:var(--brand);
}
.svc-icon svg{width:26px;height:26px}
.svc-card h3{font-size:18px;margin-bottom:10px}
.svc-card p{font-size:14.5px;color:var(--ink-soft)}
.svc-tag{display:inline-block;margin-top:16px;font-size:12px;font-weight:700;color:var(--brand-3);background:rgba(27,59,255,.08);padding:5px 12px;border-radius:999px}

/* ===== 场景标签云 ===== */
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.tag-cloud a{
  padding:10px 20px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:14px;font-weight:600;color:var(--ink-soft);
  transition:all .24s ease;
}
.tag-cloud a:nth-child(3n+1):hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-3px)}
.tag-cloud a:nth-child(3n+2):hover{background:var(--brand-3);color:#fff;border-color:var(--brand-3);transform:translateY(-3px)}
.tag-cloud a:nth-child(3n):hover{background:var(--ink);color:#fff;border-color:var(--ink);transform:translateY(-3px)}

/* ===== 关于我们 / 平台介绍 ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.about-media{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.about-media .media-box{border-radius:16px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .3s ease}
.about-media .media-box:hover{transform:translateY(-5px)}
.about-media .media-box.wide{grid-column:span 2}
.about-list{display:grid;gap:14px;margin-top:24px}
.about-list li{display:flex;gap:12px;font-size:15px;color:var(--ink-soft)}
.about-list .tick{flex-shrink:0;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:rgba(200,255,46,.35);color:#1a2e04;font-size:12px;font-weight:900;margin-top:3px}

/* ===== 流程步骤 ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;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 .28s ease,box-shadow .28s ease;
}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  font-size:40px;font-weight:900;line-height:1;
  background:linear-gradient(135deg,var(--brand),var(--brand-3));
  -webkit-background-clip:text;background-clip:text;color:transparent;display:block;margin-bottom:14px;
}
.step h4{font-size:16px;margin-bottom:8px}
.step p{font-size:13.5px;color:var(--ink-soft)}

/* ===== 时间线 ===== */
.timeline{position:relative;max-width:900px;margin:0 auto;padding-left:0}
.timeline::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(var(--brand),var(--brand-3),var(--lime));transform:translateX(-50%)}
.tl-item{position:relative;width:50%;padding:0 40px 36px 0}
.tl-item:nth-child(even){margin-left:50%;padding:0 0 36px 40px}
.tl-item .tl-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px 22px;box-shadow:var(--shadow);transition:transform .28s ease,box-shadow .28s ease}
.tl-item .tl-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.tl-item .tl-card b{display:block;font-size:15px;margin-bottom:6px}
.tl-item .tl-card span{font-size:13.5px;color:var(--ink-soft)}
.tl-item::after{content:"";position:absolute;top:18px;right:-7px;width:14px;height:14px;border-radius:50%;background:var(--brand);border:3px solid #fff;box-shadow:0 0 0 3px rgba(255,61,104,.2)}
.tl-item:nth-child(even)::after{right:auto;left:-7px;background:var(--brand-3);box-shadow:0 0 0 3px rgba(27,59,255,.18)}

/* ===== 对比评测 ===== */
.rating-hero{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;margin-bottom:40px}
.rating-card{
  background:linear-gradient(150deg,#0e1330,#1c2450 70%,#25113a);color:#fff;border-radius:22px;
  padding:36px;box-shadow:0 24px 50px rgba(18,26,63,.28);position:relative;overflow:hidden;
}
.rating-card::after{content:"";position:absolute;right:-60px;bottom:-60px;width:200px;height:200px;border-radius:50%;background:radial-gradient(circle,rgba(255,61,104,.4),transparent 70%)}
.rating-card .score{font-size:66px;font-weight:900;line-height:1;letter-spacing:-.04em;background:linear-gradient(120deg,var(--lime),#7ef0ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.rating-card .score small{font-size:20px;color:#a9b4dd;-webkit-text-fill-color:#a9b4dd}
.stars{font-size:24px;letter-spacing:4px;color:#ffd23f;margin:12px 0 8px}
.rating-card p{color:#c3cbe8;font-size:14px;position:relative;z-index:2}
.rating-points{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rating-points li{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;
  box-shadow:var(--shadow);transition:transform .26s ease,box-shadow .26s ease;
}
.rating-points li:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.rating-points b{display:block;font-size:14.5px;margin-bottom:4px}
.rating-points span{font-size:13px;color:var(--ink-soft)}
.table-wrap{overflow-x:auto;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;min-width:680px;font-size:14.5px}
thead th{background:linear-gradient(120deg,#0e1330,#1c2450);color:#fff;font-weight:700;padding:16px 18px;text-align:left;white-space:nowrap}
tbody td{padding:15px 18px;border-top:1px solid var(--line);color:var(--ink-soft);vertical-align:top}
tbody tr:nth-child(even){background:#fafbff}
tbody td:first-child{font-weight:700;color:var(--ink)}
td .hl{color:var(--brand);font-weight:700}

/* ===== 案例中心 ===== */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.case-card{border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.case-card img{width:100%;height:230px;object-fit:cover}
.case-body{padding:22px 24px}
.case-body h4{font-size:17px;margin-bottom:8px}
.case-body p{font-size:14px;color:var(--ink-soft)}
.case-meta{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.case-meta span{font-size:12px;font-weight:700;color:var(--brand-3);background:rgba(27,59,255,.08);padding:4px 10px;border-radius:999px}

/* ===== 评论 ===== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{border-radius:var(--radius);background:#fff;border:1px solid var(--line);padding:26px;box-shadow:var(--shadow);transition:transform .28s ease,box-shadow .28s ease;position:relative}
.review:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.review .quote{font-size:34px;line-height:1;color:rgba(255,61,104,.25);font-weight:900;margin-bottom:6px}
.review p{font-size:14.5px;color:var(--ink-soft);margin-bottom:18px}
.review-user{display:flex;align-items:center;gap:12px}
.avatar{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-weight:800;color:#fff;font-size:15px;flex-shrink:0}
.review-user b{display:block;font-size:14.5px}
.review-user span{font-size:12.5px;color:#8b93b3}
.rv-stars{color:#ffb400;font-size:13px;letter-spacing:2px;margin-bottom:10px}

/* ===== 服务网络 ===== */
.network-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.net-card{border-radius:16px;background:#fff;border:1px solid var(--line);padding:24px;box-shadow:var(--shadow);transition:transform .28s ease,box-shadow .28s ease}
.net-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.net-card b{display:block;font-size:16px;margin-bottom:6px}
.net-card span{font-size:13px;color:var(--ink-soft)}

/* ===== 价格参考 ===== */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.price-card{border-radius:var(--radius);background:#fff;border:1.5px solid var(--line);padding:32px 28px;box-shadow:var(--shadow);transition:transform .28s ease,box-shadow .28s ease;position:relative;display:flex;flex-direction:column}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.price-card.featured{border-color:var(--brand);box-shadow:0 18px 40px rgba(255,61,104,.18)}
.price-card .badge{position:absolute;top:-13px;right:24px;font-size:12px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));padding:5px 14px;border-radius:999px}
.price-card h4{font-size:17px;margin-bottom:6px}
.price-card .amt{font-size:34px;font-weight:900;letter-spacing:-.02em;margin:12px 0 6px}
.price-card .amt small{font-size:14px;font-weight:600;color:var(--ink-soft)}
.price-card ul{display:grid;gap:10px;margin:18px 0 24px;flex:1}
.price-card ul li{font-size:13.5px;color:var(--ink-soft);padding-left:20px;position:relative}
.price-card ul li::before{content:"✓";position:absolute;left:0;color:var(--brand);font-weight:900}

/* ===== FAQ ===== */
.faq-wrap{max-width:900px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden;transition:box-shadow .25s ease}
.faq-item:hover{box-shadow:var(--shadow-hover)}
.faq-q{
  width:100%;text-align:left;background:none;border:none;cursor:pointer;padding:20px 24px;
  font-size:15.5px;font-weight:700;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:16px;
  font-family:inherit;transition:color .2s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-q .plus{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:rgba(255,61,104,.1);color:var(--brand);display:grid;place-items:center;font-size:18px;font-weight:700;transition:transform .3s ease,background .3s ease}
.faq-item.open .faq-q .plus{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .38s ease}
.faq-a p{padding:0 24px 22px;font-size:14.5px;color:var(--ink-soft)}

/* ===== 文章 ===== */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.article-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow);transition:transform .28s ease,box-shadow .28s ease;display:flex;flex-direction:column}
.article-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.article-card .cat{font-size:12px;font-weight:800;color:var(--brand);letter-spacing:.06em;margin-bottom:10px}
.article-card h4{font-size:16px;line-height:1.5;margin-bottom:10px}
.article-card p{font-size:13.5px;color:var(--ink-soft);flex:1}
.article-card .more{margin-top:16px;font-size:13.5px;font-weight:700;color:var(--brand-3)}

/* ===== 表单 ===== */
.form-section{background:linear-gradient(150deg,#0e1330,#141c44 60%,#1a1240);color:#fff}
.form-section .eyebrow{color:var(--lime);background:rgba(200,255,46,.12)}
.form-section .section-head h2{color:#fff}
.form-section .section-head p{color:#b6bfe0}
.form-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;align-items:start}
.contact-box{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:32px}
.contact-box h3{font-size:18px;margin-bottom:18px}
.contact-list{display:grid;gap:16px}
.contact-list li{display:flex;gap:12px;font-size:14px;color:#c6cdee;align-items:flex-start}
.contact-list .ci{width:34px;height:34px;border-radius:10px;background:rgba(255,61,104,.22);display:grid;place-items:center;flex-shrink:0;color:#ffb0c4}
.contact-list a{color:#fff;font-weight:600;word-break:break-all}
.qr-box{margin-top:22px;display:flex;align-items:center;gap:16px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:16px}
.qr-box img{width:100px;height:100px;object-fit:contain;border-radius:10px;background:#fff;padding:4px}
.qr-box span{font-size:13px;color:#c6cdee}
form.demand-form{background:#fff;border-radius:20px;padding:32px;box-shadow:0 24px 50px rgba(0,0,0,.24);display:grid;gap:16px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
form.demand-form label{display:block;font-size:13px;font-weight:700;color:var(--ink);margin-bottom:6px}
form.demand-form input,form.demand-form select,form.demand-form textarea{
  width:100%;padding:12px 14px;border-radius:10px;border:1.5px solid var(--line);
  font-family:inherit;font-size:14px;color:var(--ink);background:#fafbff;transition:border-color .2s ease,box-shadow .2s ease;
}
form.demand-form input:focus,form.demand-form select:focus,form.demand-form textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,61,104,.12);background:#fff;
}
form.demand-form textarea{min-height:110px;resize:vertical}
form.demand-form .btn{width:100%;padding:15px;font-size:15px}

/* ===== 页脚 ===== */
footer.site-footer{background:#0a0e25;color:#a9b4dd;padding:64px 0 0;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand .ai-page-logo{height:40px;margin-bottom:16px;filter:brightness(0) invert(1)}
.foot-brand p{font-size:13.5px;line-height:1.8;color:#8a94bd;max-width:300px}
.foot-col h5{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.foot-col ul{display:grid;gap:10px}
.foot-col a{color:#8a94bd;transition:color .2s ease}
.foot-col a:hover{color:var(--lime)}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 16px}
.foot-bottom{padding:24px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#7a84ad}
.foot-bottom a{color:#a9b4dd}

/* ===== 浮动客服 ===== */
.float-kefu{position:fixed;right:22px;bottom:100px;z-index:120}
.fk-btn{
  width:58px;height:58px;border-radius:50%;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;
  box-shadow:0 12px 28px rgba(255,61,104,.42);display:grid;place-items:center;
  transition:transform .24s ease;font-family:inherit;
}
.fk-btn:hover{transform:scale(1.08)}
.fk-btn svg{width:26px;height:26px}
.fk-panel{
  position:absolute;right:0;bottom:72px;width:230px;background:#fff;border-radius:16px;
  box-shadow:0 20px 44px rgba(18,26,63,.22);padding:18px;text-align:center;
  opacity:0;visibility:hidden;transform:translateY(12px);transition:.28s ease;
}
.fk-panel.show{opacity:1;visibility:visible;transform:none}
.fk-panel img{width:150px;height:150px;object-fit:contain;margin:0 auto 10px;background:#fff}
.fk-panel p{font-size:13px;color:var(--ink-soft);margin-bottom:8px}
.fk-panel a{font-size:13px;color:var(--brand);font-weight:700}
.back-top{
  position:fixed;right:22px;bottom:30px;z-index:120;width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;
  box-shadow:var(--shadow);display:grid;place-items:center;opacity:0;visibility:hidden;
  transition:.28s ease;font-family:inherit;
}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}

/* ===== 响应式 ===== */
@media (max-width:1080px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .hero h1{font-size:38px}
  .nav-links{display:none}
  .burger{display:flex}
  .nav-links.mobile-open{
    display:flex;flex-direction:column;position:absolute;left:0;right:0;top:100%;
    background:#fff;padding:14px 20px 22px;border-bottom:1px solid var(--line);
    box-shadow:0 18px 34px rgba(18,26,63,.12);gap:2px;
  }
  .nav-links.mobile-open a{padding:12px 10px;border-radius:8px}
  .metrics,.grid-3,.steps,.network-grid,.price-grid,.review-grid,.article-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid,.form-grid,.rating-hero{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .case-grid{grid-template-columns:1fr}
  .tl-item,.tl-item:nth-child(even){width:100%;margin-left:0;padding:0 0 30px 32px}
  .timeline::before{left:8px}
  .tl-item::after,.tl-item:nth-child(even)::after{left:1px;right:auto}
}
@media (max-width:720px){
  .section{padding:64px 0}
  .hero{padding:64px 0 72px}
  .hero h1{font-size:30px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .section-head h2{font-size:26px}
  .metrics,.grid-3,.steps,.network-grid,.price-grid,.review-grid,.article-grid,.form-row{grid-template-columns:1fr}
  .rating-points{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .topbar .container{justify-content:center;text-align:center}
  .topbar .tb-right{justify-content:center}
  .brand-txt span{display:none}
  .hero-actions .btn{width:100%}
  form.demand-form,.contact-box{padding:24px}
  .rating-card{padding:28px}
  .rating-card .score{font-size:52px}
  .about-media{grid-template-columns:1fr}
  .about-media .media-box.wide{grid-column:span 1}
  .float-kefu{right:14px;bottom:88px}
  .back-top{right:14px;bottom:24px}
}