:root{
  --ink:#17233b;
  --muted:#60708b;
  --line:#e7ebf4;
  --paper:#f7f9fc;
  --white:#fff;
  --blue:#2459ff;
  --cyan:#16c6d4;
  --pink:#ff4d91;
  --yellow:#ffc63d;
  --orange:#ff7855;
  --green:#18a879;
  --shadow:0 18px 50px rgba(27,49,98,.10);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}
.navbar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.ai-page-logo{width:138px}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{padding:8px 10px;color:#46536d;font-size:13px;white-space:nowrap}
.nav-links a:hover{color:var(--blue)}
.nav-cta,.primary-btn{display:inline-flex;align-items:center;justify-content:center;border:0;background:var(--blue);color:#fff;border-radius:9px;padding:12px 20px;font-weight:700;cursor:pointer;box-shadow:0 8px 18px rgba(36,89,255,.23);transition:.25s}
.nav-cta:hover,.primary-btn:hover{transform:translateY(-2px);background:#173ed0}
.menu-toggle{display:none;background:none;border:0;font-size:25px;color:var(--ink)}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#172b68 0%,#2459ff 52%,#13bdc7 100%);color:#fff;padding:88px 0 72px}
.hero:before,.hero:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.24);transform:rotate(28deg);pointer-events:none}
.hero:before{width:420px;height:420px;right:-160px;top:-170px;border-radius:44px}
.hero:after{width:300px;height:300px;left:-150px;bottom:-210px;border-radius:50%}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center;position:relative;z-index:1}
.eyebrow{display:inline-block;color:#15336f;background:#ffe06b;border-radius:4px;padding:5px 12px;font-size:13px;font-weight:700;margin-bottom:18px}
h1{font-size:clamp(38px,5vw,68px);line-height:1.1;margin:0 0 22px;letter-spacing:0}
.hero p{font-size:18px;color:#eaf3ff;max-width:650px;margin:0 0 30px}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap}
.hero .primary-btn{background:#fff;color:#1745d2}
.ghost-btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,.55);color:#fff;border-radius:9px;padding:11px 20px;font-weight:700}
.hero-panel{border:1px solid rgba(255,255,255,.3);background:rgba(13,27,75,.28);padding:24px;border-radius:20px;box-shadow:0 24px 60px rgba(7,18,70,.25)}
.panel-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,.2);padding-bottom:14px;margin-bottom:17px}
.panel-head strong{font-size:18px}
.live{font-size:12px;background:#b6ffe5;color:#075c43;padding:4px 9px;border-radius:20px}
.mini-row{display:flex;justify-content:space-between;gap:14px;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.14);font-size:14px}
.mini-row:last-child{border-bottom:0}
.mini-row b{color:#fff36d}
section{padding:86px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:34px}
.section-head h2{font-size:34px;line-height:1.2;margin:0 0 10px}
.section-head p{max-width:650px;color:var(--muted);margin:0}
.kicker{color:var(--pink);font-size:13px;font-weight:800;letter-spacing:1px}
.metrics{background:#fff;border-bottom:1px solid var(--line);padding:24px 0}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.metric{padding:18px 20px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0}
.metric strong{display:block;font-size:29px;color:var(--blue)}
.metric span{color:var(--muted);font-size:14px}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.about-copy p{color:var(--muted)}
.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:25px}
.feature-list div{background:#fff;border-left:4px solid var(--cyan);padding:15px 17px;box-shadow:0 7px 24px rgba(35,54,92,.06)}
.feature-list b{display:block;margin-bottom:3px}
.feature-list span{font-size:13px;color:var(--muted)}
.color-block{background:#17233b;color:#fff;padding:32px;border-radius:22px;position:relative;overflow:hidden}
.color-block:after{content:"";position:absolute;width:180px;height:180px;background:var(--pink);right:-70px;top:-70px;border-radius:50%;opacity:.8}
.color-block h3{position:relative;z-index:1;font-size:26px;margin:0 0 14px}
.color-block p{position:relative;z-index:1;color:#d6e1f4}
.tag-cloud{display:flex;gap:9px;flex-wrap:wrap;position:relative;z-index:1}
.tag-cloud span{border:1px solid rgba(255,255,255,.3);padding:6px 11px;border-radius:5px;font-size:13px}
.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.service-card{background:#fff;padding:22px;border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:12px;transition:.25s}
.service-card:nth-child(4n+2){border-top-color:var(--pink)}
.service-card:nth-child(4n+3){border-top-color:var(--yellow)}
.service-card:nth-child(4n+4){border-top-color:var(--cyan)}
.service-card:hover,.review:hover,.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.service-card h3{font-size:18px;margin:0 0 8px}
.service-card p{font-size:14px;color:var(--muted);margin:0}
.workflow{background:#fff}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0}
.step{padding:20px 18px;border-top:3px solid var(--cyan);position:relative}
.step:not(:last-child):after{content:"→";position:absolute;right:-9px;top:32px;color:var(--pink);font-size:24px;z-index:1}
.step-number{color:var(--pink);font-weight:800;font-size:13px}
.step h3{font-size:17px;margin:8px 0}
.step p{margin:0;color:var(--muted);font-size:13px}
.split-section{display:grid;grid-template-columns:.9fr 1.1fr;gap:44px;align-items:start}
.solution-list{display:grid;gap:12px}
.solution-item{display:flex;gap:14px;align-items:flex-start;background:#fff;padding:16px;border:1px solid var(--line)}
.solution-item i{font-style:normal;background:#e8f7ff;color:#087aa8;padding:3px 8px;font-weight:bold}
.solution-item h3{margin:0;font-size:17px}
.solution-item p{margin:3px 0 0;color:var(--muted);font-size:14px}
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px}
.compare-table{width:100%;border-collapse:collapse;min-width:690px}
.compare-table th,.compare-table td{padding:16px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
.compare-table th{background:#eef3ff;color:#173baf}
.compare-table tr:last-child td{border-bottom:0}
.compare-table td:first-child{font-weight:700;color:#263552}
.score-box{background:linear-gradient(135deg,#ff4d91,#ff7855);color:#fff;border-radius:18px;padding:28px;text-align:center}
.score-box strong{font-size:54px;line-height:1}
.stars{color:#ffe36c;font-size:24px;letter-spacing:2px}
.case-grid,.review-grid,.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case-card,.review{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.25s}
.media-box{background:#eaf0ff;padding:10px}
.media-box img{width:100%;aspect-ratio:16/8;object-fit:cover;border-radius:8px}
.case-card div:last-child,.review-body{padding:20px}
.case-card h3,.review h3{font-size:18px;margin:0 0 8px}
.case-card p,.review p{color:var(--muted);font-size:14px;margin:0}
.review-grid{grid-template-columns:repeat(3,1fr)}
.review{padding:21px}
.review p{margin:12px 0}
.review small{color:#7b8799}
.review .stars{font-size:17px}
.network{background:#17233b;color:#fff}
.network .section-head p{color:#c4d1e9}
.network-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.network-box{border:1px solid rgba(255,255,255,.2);padding:24px;border-radius:14px;background:rgba(255,255,255,.05)}
.network-box h3{margin:0 0 12px;color:#fff}
.network-box p{color:#c4d1e9;margin:0}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.price-card{background:#fff;padding:24px;border:1px solid var(--line);border-radius:12px}
.price-card.featured{border:2px solid var(--pink);position:relative}
.price-card h3{margin:0 0 8px}
.price-card strong{font-size:28px;color:var(--blue)}
.price-card p{color:var(--muted);font-size:14px}
.price-card ul{padding-left:18px;color:var(--muted);font-size:14px}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:17px 19px;font-weight:700;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";float:right;color:var(--pink);font-size:21px;line-height:1}
.faq-item[open] summary:after{content:"−"}
.faq-item p{margin:0;padding:0 19px 17px;color:var(--muted);font-size:14px}
.article-card{background:#fff;border-bottom:3px solid var(--cyan);padding:21px;border-radius:10px}
.article-card h3{font-size:17px;margin:0 0 8px}
.article-card p{font-size:14px;color:var(--muted);margin:0 0 15px}
.article-card a{color:var(--blue);font-weight:700;font-size:13px}
.form-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:35px;align-items:start}
.contact-panel{background:#17233b;color:#fff;border-radius:18px;padding:29px}
.contact-panel h3{font-size:25px;margin-top:0}
.contact-panel p{color:#c6d5ee}
.contact-line{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.15);font-size:14px}
.qr{width:135px;margin-top:18px;background:#fff;padding:7px;border-radius:8px}
.form-card{background:#fff;padding:28px;border:1px solid var(--line);border-radius:16px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}
.field{display:grid;gap:7px}
.field.full{grid-column:1/-1}
label{font-size:14px;font-weight:700}
input,select,textarea{width:100%;border:1px solid #d9e0ec;border-radius:7px;padding:12px 13px;font:inherit;color:var(--ink);background:#fbfcfe}
textarea{min-height:130px;resize:vertical}
.form-note{font-size:12px;color:var(--muted);margin:13px 0 0}
.footer{background:#101a2f;color:#d7e0ef;padding:45px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:35px}
.footer h3{color:#fff;margin:0 0 12px;font-size:17px}
.footer p{font-size:13px;color:#aebbd0;margin:5px 0}
.footer-links{display:flex;flex-wrap:wrap;gap:7px 16px}
.footer-links a{font-size:13px;color:#d7e0ef}
.footer-links a:hover{color:#69e2ea}
.copyright{border-top:1px solid rgba(255,255,255,.13);margin-top:28px;padding-top:18px;color:#94a4bd;font-size:12px}
.float-tools{position:fixed;right:20px;bottom:22px;z-index:15;display:grid;gap:8px}
.float-tools a,.float-tools button{border:0;background:#fff;color:var(--blue);box-shadow:0 8px 25px rgba(27,49,98,.18);width:46px;height:46px;border-radius:50%;display:grid;place-items:center;font-size:18px;cursor:pointer}
.reveal{opacity:0;transform:translateY(18px);transition:.7s ease}
.reveal.visible{opacity:1;transform:none}
@media(max-width:1050px){
 .nav-links a{padding:8px 6px;font-size:12px}
 .service-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:780px){
 .container{width:min(100% - 28px,620px)}
 .menu-toggle{display:block}
 .nav-cta{display:none}
 .nav-links{display:none;position:absolute;left:14px;right:14px;top:68px;padding:10px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:10px;flex-direction:column;align-items:stretch}
 .nav-links.open{display:flex}
 .nav-links a{padding:10px 12px;border-bottom:1px solid #f0f2f6}
 .hero{padding:67px 0 56px}
 .hero-grid,.about-grid,.split-section,.form-layout,.network-grid{grid-template-columns:1fr;gap:28px}
 h1{font-size:43px}
 .metrics-grid{grid-template-columns:1fr 1fr}
 .metric{border-right:0;border-bottom:1px solid var(--line)}
 section{padding:62px 0}
 .section-head{display:block}
 .section-head h2{font-size:29px}
 .service-grid{grid-template-columns:1fr 1fr}
 .steps{grid-template-columns:1fr;gap:8px}
 .step{border-top:0;border-left:3px solid var(--cyan);padding:14px 18px}
 .step:not(:last-child):after{content:"↓";right:auto;left:18px;top:auto;bottom:-18px}
 .case-grid,.review-grid,.article-grid,.price-grid,.faq-list{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr;gap:22px}
 .feature-list{grid-template-columns:1fr}
 .form-grid{grid-template-columns:1fr}
 .field.full{grid-column:auto}
}
@media(prefers-reduced-motion:reduce){
 *{scroll-behavior:auto!important;animation:none!important;transition:none!important}
}