:root{
  --black:#0b0b0c;
  --black2:#151518;
  --paper:#f4f1ec;
  --white:#ffffff;
  --ink:#151515;
  --text:#3f4146;
  --muted:#737780;
  --line:#d9d5ce;
  --hot:#f24b2a;
  --hot2:#ff6f3c;
  --sand:#e9e1d5;
  --lime:#c7ef2f;
  --max:1280px;
  --shadow:0 18px 50px rgba(0,0,0,.09);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--text);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.75}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.container{width:min(var(--max),calc(100% - 44px));margin:auto}
.kicker{font-size:12px;font-weight:900;letter-spacing:.18em;text-transform:uppercase;color:var(--hot)}
.section{padding:76px 0}
.section-white{background:#fff}
.section-black{background:var(--black);color:#fff}
.section-head{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:end;margin-bottom:30px}
.section-head h2{font-size:36px;line-height:1.15;margin:7px 0 0;color:var(--ink);letter-spacing:-.03em}
.section-head p{max-width:760px;color:var(--muted);margin:10px 0 0}
.section-black .section-head h2{color:#fff}
.section-black .section-head p{color:#a7a9ae}
.more{font-weight:900;color:var(--hot);font-size:13px}

.top-strip{background:var(--hot);color:#fff;font-size:12px}
.top-strip .container{display:flex;justify-content:space-between;padding:7px 0;gap:20px}
.header{background:var(--black);color:#fff;border-bottom:1px solid #262629;position:sticky;top:0;z-index:50}
.header-row{height:82px;display:flex;align-items:center;gap:36px}
.brand{display:flex;align-items:center;gap:12px;font-size:23px;font-weight:900}
.brand-mark{width:42px;height:42px;background:var(--hot);clip-path:polygon(0 0,100% 0,74% 100%,0 100%);position:relative}
.brand-mark:after{content:"";position:absolute;left:14px;top:11px;border-left:15px solid #fff;border-top:10px solid transparent;border-bottom:10px solid transparent}
.nav{margin-left:auto;display:flex;gap:4px}
.nav a{padding:30px 16px;font-size:13px;font-weight:800;color:#d8d8dc;border-left:1px solid #222226}
.nav a:last-child{border-right:1px solid #222226}
.nav a:hover,.nav a.active{background:var(--hot);color:#fff}
.menu-btn{display:none;margin-left:auto;background:none;color:#fff;border:1px solid #555;padding:8px 11px}

.hero{background:var(--black);color:#fff;padding:62px 0 74px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:46px;align-items:center}
.hero h1{font-size:64px;line-height:1.02;margin:14px 0 18px;letter-spacing:-.05em}
.hero h1 .accent{color:var(--hot)}
.hero p{font-size:18px;color:#b8bbc2;max-width:720px}
.hero-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 21px;font-size:13px;font-weight:900}
.btn-hot{background:var(--hot);color:#fff}
.btn-dark{border:1px solid #65656b;color:#fff}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px}
.hero-tags span{border:1px solid #36363a;color:#c9c9cf;padding:6px 10px;font-size:12px}
.hero-media{display:grid;grid-template-columns:1.25fr .75fr;grid-template-rows:230px 230px;gap:12px}
.hero-media .big{grid-row:1/3}
.hero-media img{width:100%;height:100%;object-fit:cover;filter:saturate(.88) contrast(1.03)}
.hero-media .frame{position:relative;overflow:hidden}
.hero-media .frame:after{content:"";position:absolute;inset:0;border:1px solid rgba(255,255,255,.12)}
.hero-media .label{position:absolute;left:0;bottom:0;background:var(--hot);padding:7px 10px;font-size:11px;font-weight:900;z-index:2}

.stat-band{background:#fff;border-bottom:1px solid var(--line)}
.stats{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:23px 25px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat strong{display:block;font-size:20px;color:var(--ink)}
.stat span{font-size:12px;color:var(--muted)}

.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-media{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.about-media img{width:100%;height:260px;object-fit:cover}
.about-media img:first-child{grid-column:1/3;height:320px}
.about-copy h2{font-size:40px;line-height:1.16;color:var(--ink);margin:9px 0 18px}
.about-copy p{margin:0 0 15px}
.about-points{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--ink);margin-top:23px}
.about-point{padding:16px 16px 16px 0;border-bottom:1px solid var(--line);font-size:13px;font-weight:800;color:#3f4146}
.about-point:nth-child(even){padding-left:16px;border-left:1px solid var(--line)}
.about-point:before{content:"→";color:var(--hot);margin-right:7px}

.adv-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--black)}
.adv-card{background:#fff;padding:30px;min-height:260px}
.adv-card .num{font-size:48px;line-height:1;color:var(--hot);font-weight:900}
.adv-card h3{font-size:21px;margin:20px 0 10px;color:var(--ink)}
.adv-card p{font-size:14px;color:var(--muted);margin:0}

.services-grid{display:grid;grid-template-columns:1.3fr .7fr .7fr;gap:16px}
.service-card{background:var(--black2);color:#fff;padding:28px;min-height:260px;position:relative;overflow:hidden}
.service-card.feature{grid-row:span 2;min-height:536px;background:var(--hot)}
.service-card .index{font-size:44px;font-weight:900;color:rgba(255,255,255,.2)}
.service-card h3{font-size:23px;margin:14px 0 9px}
.service-card.feature h3{font-size:31px}
.service-card p{font-size:14px;color:#bfc1c6}
.service-card.feature p{color:#fff5f1}
.service-card ul{padding-left:18px;color:#c7c8cc;font-size:13px}
.service-card.feature ul{color:#fff}
.service-card:after{content:"";position:absolute;width:140px;height:140px;border:1px solid rgba(255,255,255,.12);right:-42px;bottom:-42px;transform:rotate(20deg)}

.cap-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:52px;align-items:start}
.cap-title h2{font-size:40px;line-height:1.15;color:#fff;margin:9px 0 17px}
.cap-title p{color:#aeb1b8}
.cap-stack{display:grid;gap:1px;background:#2a2a2e}
.cap-item{background:#141417;padding:22px;display:grid;grid-template-columns:48px 1fr;gap:15px}
.cap-code{width:48px;height:48px;background:var(--hot);display:grid;place-items:center;font-weight:900}
.cap-item h3{margin:0 0 5px;font-size:18px}
.cap-item p{margin:0;color:#a9abb1;font-size:13px}

.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review{background:#fff;border-top:5px solid var(--hot);padding:26px;box-shadow:var(--shadow)}
.review .tag{font-size:11px;font-weight:900;color:var(--hot);letter-spacing:.12em}
.review h3{font-size:20px;color:var(--ink);margin:13px 0 9px}
.review p{font-size:14px;color:var(--muted);margin:0}
.review-foot{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-size:12px;color:#8b8f96}

.faq-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:50px}
.faq-intro h2{font-size:40px;line-height:1.15;color:var(--ink);margin:9px 0 13px}
.faq-intro p{color:var(--muted)}
.faq-list{display:grid;gap:8px}
details{background:#fff;border:1px solid var(--line);padding:0 18px}
summary{cursor:pointer;list-style:none;padding:17px 0;font-weight:900;color:var(--ink)}
summary::-webkit-details-marker{display:none}
details p{font-size:14px;color:var(--muted);margin:0 0 17px}

.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.news-card{background:#fff;border:1px solid var(--line)}
.news-card img{width:100%;height:220px;object-fit:cover}
.news-body{padding:18px}
.badge{display:inline-flex;background:var(--black);color:#fff;padding:4px 8px;font-size:11px;font-weight:900}
.news-card h3{font-size:18px;line-height:1.46;color:var(--ink);margin:10px 0 8px}
.news-card p{font-size:13px;color:var(--muted);margin:0}
.news-meta{font-size:12px;color:#8d9096;margin-top:12px}

.platform-panel{display:grid;grid-template-columns:1fr 1fr;background:var(--hot);color:#fff}
.platform-copy{padding:42px}
.platform-copy h2{font-size:38px;line-height:1.15;margin:8px 0 13px}
.platform-copy p{color:#fff1eb}
.platform-links{display:grid;grid-template-columns:1fr 1fr;background:#111114}
.platform-link{padding:24px;color:#fff;border-right:1px solid #2a2a2d;border-bottom:1px solid #2a2a2d}
.platform-link:nth-child(even){border-right:0}
.platform-link strong{display:block;font-size:17px}
.platform-link span{display:block;font-size:12px;color:#a9abb0;margin-top:6px}

.page-hero{background:var(--black);color:#fff;padding:58px 0}
.breadcrumb{font-size:12px;color:#9a9ca2;margin-bottom:14px}
.page-hero h1{font-size:46px;line-height:1.18;margin:0 0 13px}
.page-hero p{max-width:900px;color:#b6b8be;font-size:17px}

.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px}
.content-box{background:#fff;padding:36px;border:1px solid var(--line)}
.content-box h2{font-size:28px;color:var(--ink);margin:34px 0 11px}
.content-box h2:first-child{margin-top:0}
.content-box h3{font-size:19px;color:var(--ink)}
.content-box p,.content-box li{color:#52555d}
.content-box .lead{font-size:18px;line-height:1.9}
.side-box{background:var(--black);color:#fff;padding:24px;height:max-content;position:sticky;top:105px}
.side-box h2{font-size:19px;margin:0 0 10px}
.side-box p,.side-box li{font-size:13px;color:#b8bac0}
.side-box ul{padding-left:18px}

.app-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.phone{width:300px;height:560px;margin:auto;background:#fff;border:12px solid var(--black);border-radius:36px;overflow:hidden;box-shadow:var(--shadow)}
.phone-head{height:160px;background:var(--hot);color:#fff;padding:34px 22px}
.phone-head strong{font-size:25px}
.phone-body{padding:22px}
.phone-row{height:72px;background:#eeeae4;margin-bottom:12px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.step{background:#fff;border-top:4px solid var(--hot);padding:22px}
.step .num{font-size:30px;font-weight:900;color:var(--hot)}
.step h3{font-size:17px;color:var(--ink);margin:7px 0}
.step p{font-size:13px;color:var(--muted);margin:0}

.service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.service-detail{background:#fff;border:1px solid var(--line);padding:28px}
.service-detail .icon{font-size:40px;font-weight:900;color:var(--hot)}
.service-detail h2{font-size:23px;color:var(--ink);margin:12px 0 8px}
.service-detail p,.service-detail li{color:#575b63}

.policy-note{background:#fff0e9;border-left:4px solid var(--hot);padding:16px 18px}

/* 新闻中心：桌面端4列 */
.news-index-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.news-index-card{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column}
.news-index-card img{width:100%;height:170px;object-fit:cover}
.news-index-body{padding:16px;display:flex;flex-direction:column;flex:1}
.news-index-card h2{font-size:16px;line-height:1.48;color:var(--ink);margin:9px 0 7px}
.news-index-card p{font-size:12px;color:var(--muted);margin:0}
.news-index-card time{font-size:11px;color:#92959b;margin-top:auto;padding-top:12px}

/* 文章详情 */
.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:28px;align-items:start;padding-bottom:70px}
.article-head-pro{padding:46px 0 22px}
.article-category{display:inline-flex;background:var(--hot);color:#fff;padding:5px 9px;font-size:11px;font-weight:900}
.article-head-pro h1{font-size:43px;line-height:1.25;color:var(--ink);margin:12px 0 14px}
.article-info{display:flex;gap:13px;flex-wrap:wrap;color:#898d95;font-size:12px}
.article-cover{width:100%;height:500px;object-fit:cover}
.article-lead{background:#fff;border-left:5px solid var(--hot);padding:20px 22px;font-size:17px;margin:18px 0}
.article-keypoints{background:var(--black);color:#fff;padding:22px;margin-bottom:18px}
.article-keypoints h2{font-size:19px;margin:0 0 10px}
.article-keypoints ul{margin:0;padding-left:18px;color:#c5c7cc}
.article-content{background:#fff;padding:36px;border:1px solid var(--line)}
.article-content h2{font-size:27px;color:var(--ink);margin:34px 0 10px}
.article-content h2:first-child{margin-top:0}
.article-content p,.article-content li{font-size:17px;color:#4b4f57}
.article-content blockquote{margin:25px 0;padding:18px;background:#f2efe9;border-left:4px solid var(--hot)}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0}
.article-tag{background:#fff;border:1px solid var(--line);padding:6px 10px;font-size:12px}
.article-nav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0}
.article-nav a{background:#fff;border:1px solid var(--line);padding:17px;min-height:94px}
.article-nav small{display:block;color:#999da5;margin-bottom:5px}
.article-nav strong{display:block;color:var(--ink);line-height:1.5}
.article-nav .next{text-align:right}
.article-side{position:sticky;top:104px}
.article-side-card{background:#fff;border:1px solid var(--line);padding:18px;margin-bottom:12px}
.article-side-card h3{font-size:16px;color:var(--ink);margin:0 0 10px}
.article-side-card a{display:block;padding:8px 0;border-bottom:1px solid #ece8e2;font-size:12px;color:#51545b}
.article-side-card a:last-child{border-bottom:0}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.related-card{background:#fff;border:1px solid var(--line)}
.related-card img{width:100%;height:140px;object-fit:cover}
.related-card .inner{padding:13px}
.related-card .cat{font-size:10px;color:var(--hot);font-weight:900}
.related-card h3{font-size:14px;line-height:1.45;color:var(--ink);margin:6px 0}
.related-card time{font-size:10px;color:#92959a}
.article-footer-info{background:var(--black);color:#fff;padding:21px;margin-top:24px}
.article-footer-info p{font-size:13px;color:#b5b7bd}
.article-back{color:var(--hot2);font-weight:900;font-size:12px}

.footer{background:#09090a;color:#b2b4ba;padding:48px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.45fr repeat(3,1fr);gap:32px}
.footer-title{color:#fff;font-weight:900;margin-bottom:10px}
.footer p,.footer a{font-size:13px}
.footer a{display:block;margin:7px 0}
.footer-bottom{border-top:1px solid #242427;margin-top:28px;padding-top:17px;font-size:12px;color:#777a81}

@media(max-width:1020px){
 .hero-grid,.about-grid,.cap-grid,.faq-grid,.content-layout,.app-grid,.article-shell{grid-template-columns:1fr}
 .services-grid{grid-template-columns:1fr 1fr}.service-card.feature{grid-row:auto;grid-column:1/3;min-height:320px}
 .adv-strip,.review-grid,.news-grid{grid-template-columns:1fr 1fr}
 .steps{grid-template-columns:1fr 1fr}.news-index-grid{grid-template-columns:repeat(2,1fr)}
 .nav{display:none;position:absolute;left:0;right:0;top:82px;background:var(--black);flex-direction:column;gap:0}.nav.open{display:flex}.nav a{padding:14px 20px;border:0;border-bottom:1px solid #242427}
 .menu-btn{display:block}.side-box,.article-side{position:static}
}
@media(max-width:650px){
 .container{width:min(var(--max),calc(100% - 28px))}
 .top-strip{display:none}.section{padding:54px 0}.hero{padding:46px 0 60px}.hero h1{font-size:39px}
 .hero-media{grid-template-columns:1fr 1fr;grid-template-rows:200px 150px}.hero-media .big{grid-column:1/3;grid-row:auto}
 .stats,.adv-strip,.review-grid,.news-grid,.steps,.service-list,.news-index-grid{grid-template-columns:1fr}
 .stat{border-right:0;border-bottom:1px solid var(--line)}.stat:last-child{border-bottom:0}
 .about-points{grid-template-columns:1fr}.about-point:nth-child(even){padding-left:0;border-left:0}
 .services-grid{grid-template-columns:1fr}.service-card.feature{grid-column:auto}
 .platform-panel{grid-template-columns:1fr}.platform-links{grid-template-columns:1fr}
 .page-hero h1,.article-head-pro h1{font-size:31px}.article-cover{height:270px}
 .article-content{padding:23px}.article-nav{grid-template-columns:1fr}.article-nav .next{text-align:left}.related-grid{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr 1fr}
}