/* ===========================================================
   可见智能 · 官方网站  |  蓝白商务风 · 全新版式 v3
   主色 #0068E0  |  品牌蓝主色块 + 白色内容区
   设计语言：稳重可信、强对比、大留白、精致卡片
   =========================================================== */

:root{
  --brand:#0068E0;
  --brand-600:#0057C8;
  --brand-700:#0A4DA8;
  --brand-800:#003F8F;
  --brand-50:#EEF5FE;
  --brand-100:#DCEBFD;
  --brand-200:#C2DBFA;
  --ink:#0E1B2C;
  --body:#3A4757;
  --muted:#64748B;
  --line:#E3EAF3;
  --bg:#ffffff;
  --bg-soft:#F6F9FC;
  --bg-deep:#081A33;
  --radius:16px;
  --radius-sm:10px;
  --maxw:1180px;
  --shadow:0 4px 20px rgba(10,77,168,.06);
  --shadow-lg:0 20px 50px rgba(10,77,168,.16);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans CN",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  color:var(--body);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4,h5{color:var(--ink);line-height:1.28;font-weight:800;letter-spacing:.2px;text-wrap:balance}
p{margin:0 0 1em;text-wrap:pretty}
ul,ol{margin:0 0 1em;padding-left:1.25em}
li{margin:.35em 0;text-wrap:pretty}
.container{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.muted{color:var(--muted)}
.center{text-align:center}
.blue{color:var(--brand)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;justify-content:center;
  padding:.82em 1.7em;border-radius:10px;font-weight:700;font-size:15px;
  border:1.5px solid transparent;cursor:pointer;transition:all .22s;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(0,104,224,.28)}
.btn-primary:hover{background:var(--brand-600);color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,104,224,.34)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand-200)}
.btn-ghost:hover{background:var(--brand-50);color:var(--brand-700);border-color:var(--brand)}
.btn-light{background:#fff;color:var(--brand)}
.btn-light:hover{background:var(--brand-50);transform:translateY(-2px)}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:108px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:19px;padding:10px 0}
.brand .logo-mark{height:84px;width:auto;flex:0 0 auto;display:block}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1px}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-links a{
  color:var(--ink);font-weight:600;font-size:15px;padding:.5em .9em;border-radius:8px;position:relative;
}
.nav-links a:hover{color:var(--brand);background:var(--brand-50)}
.nav-links a.active{color:var(--brand);font-weight:700}
.nav-links a.active::after{content:"";position:absolute;left:.9em;right:.9em;bottom:.15em;height:2px;background:var(--brand);border-radius:2px}
.nav-cta{margin-left:8px}
.nav-links a.btn{background:var(--brand);color:#fff;padding:.55em 1.15em}
.nav-links a.btn:hover{background:var(--brand-600);color:#fff}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}

/* ---------- Hero（首页首屏：蓝白商务 + 强口号） ---------- */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(160deg,var(--brand-800) 0%,var(--brand-700) 48%,var(--brand) 100%);
  color:#fff;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse 700px 480px at 88% -10%,rgba(255,255,255,.14),transparent 60%),
    radial-gradient(ellipse 520px 400px at 6% 110%,rgba(255,255,255,.08),transparent 55%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.13) 1px,transparent 1.7px);
  background-size:34px 34px;
  -webkit-mask-image:linear-gradient(135deg,rgba(0,0,0,.6) 0%,transparent 55%);
  mask-image:linear-gradient(135deg,rgba(0,0,0,.6) 0%,transparent 55%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;padding:104px 0 96px;max-width:860px}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5em;font-size:13px;font-weight:700;color:#fff;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);
  padding:.42em 1.1em;border-radius:999px;margin-bottom:24px;letter-spacing:1px;backdrop-filter:blur(4px);
}
.hero h1{font-size:clamp(34px,5.4vw,56px);margin-bottom:22px;letter-spacing:.5px;font-weight:800;color:#fff;line-height:1.24}
.hero h1 .hl{color:#A8CFFF}
.hero p.lead{font-size:clamp(16px,2.2vw,19px);color:rgba(255,255,255,.88);max-width:640px;margin-bottom:32px;line-height:1.9}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.hero-actions .btn-primary{background:#fff;color:var(--brand-700);box-shadow:0 8px 24px rgba(0,0,0,.18)}
.hero-actions .btn-primary:hover{background:var(--brand-50)}
.hero-actions .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.hero-actions .btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;border-color:#fff}
.hero-stats{display:flex;gap:44px;flex-wrap:wrap;padding-top:28px;border-top:1px solid rgba(255,255,255,.22)}
.hero-stats .stat strong{display:block;font-size:30px;color:#fff;font-weight:800;letter-spacing:-.5px;line-height:1.1}
.hero-stats .stat span{font-size:13px;color:rgba(255,255,255,.72)}

/* 内页页头（非首页）：蓝底紧凑版 */
.hero-inner.compact{padding:72px 0 64px;max-width:780px}
.hero-inner.compact h1{font-size:clamp(28px,4.2vw,44px);margin-bottom:16px}
.hero-inner.compact .eyebrow{margin-bottom:18px}
.hero-inner.compact p.lead{font-size:17px;margin-bottom:0}

@media (max-width:980px){
  .hero-inner{padding:72px 0 68px;max-width:100%}
}
@media (max-width:760px){
  .hero-inner{padding:56px 0 52px}
  .hero-stats{gap:22px 30px}
  .hero-stats .stat strong{font-size:26px}
}

/* ---------- Section ---------- */
section{padding:84px 0}
.section-head{max-width:760px;margin:0 auto 52px;text-align:center}
.section-head .tag,.section-head .kicker{display:inline-block;font-size:16px;font-weight:700;color:var(--brand);letter-spacing:2px;margin-bottom:12px;text-align:center}
.section-head h2{font-size:clamp(26px,3.8vw,40px);margin-bottom:16px}
.section-head p{color:var(--muted);font-size:17px;line-height:1.85}
.bg-soft{background:var(--bg-soft)}

/* ---------- 宽度节奏协调：消除「上宽下窄」断层 ---------- */
/* 统一各内容板块的视觉宽度基准，让过渡自然、有节奏 */
.section-head{max-width:720px;margin:0 auto 48px}
/* AI 板块：与 hero 同宽（去掉负 margin + max-width），用 section padding 自然衔接 */
.ai-core-section{padding-top:64px;margin-top:0}
.ai-core-section .container{position:relative;z-index:3}
/* FAQ 列表：不再硬压 820px，改用与 section-head 一致的舒适阅读宽 */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-wrap .faq-item{text-align:left}

/* ---------- AI 核心板块（首页 · 与全站协调版） ---------- */
.ai-panel{
  position:relative;
  background:linear-gradient(150deg,#1E5FC4 0%,var(--brand) 55%,#2D7AE0 100%);
  border-radius:20px;padding:32px 36px 30px;overflow:hidden;color:#fff;
  box-shadow:0 18px 40px -18px rgba(0,64,184,.32);
  width:100%;
}
.ai-panel::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1.7px);
  background-size:30px 30px;
  -webkit-mask-image:linear-gradient(120deg,rgba(0,0,0,.6) 0%,transparent 62%);
  mask-image:linear-gradient(120deg,rgba(0,0,0,.6) 0%,transparent 62%);
  pointer-events:none;
}
.ai-panel::after{
  content:"";position:absolute;right:-80px;top:-80px;width:360px;height:360px;
  background:radial-gradient(circle,rgba(255,255,255,.18),transparent 70%);
  border-radius:50%;pointer-events:none;
}
.ai-panel > *{position:relative;z-index:2}
.ai-panel .ai-head{max-width:680px;margin-bottom:22px}
.ai-panel .ai-head .tag{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;
  color:#fff;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);
  padding:.4em 1.1em;border-radius:999px;margin-bottom:14px;
}
.ai-panel .ai-head h2{color:#fff;font-size:clamp(24px,3.4vw,36px);margin-bottom:12px;letter-spacing:.5px}
.ai-panel .ai-head p{color:rgba(255,255,255,.92);font-size:16px;line-height:1.85;margin:0}
.ai-duo{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:14px;align-items:start}
.ai-duo .duo-card{
  background:#fff;border:0;border-radius:14px;padding:18px 22px 16px;
  box-shadow:0 8px 22px -10px rgba(0,40,120,.22);
  display:flex;flex-direction:column;align-items:center;text-align:center;
}
.ai-duo .duo-card .duo-head{
  display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:4px;
}
.ai-duo .duo-card .ic{
  width:38px;height:38px;border-radius:10px;
  background:var(--brand-50);
  display:flex;align-items:center;justify-content:center;color:var(--brand);flex-shrink:0;
}
.ai-duo .duo-card .num{color:var(--brand);font-size:22px;font-weight:800;letter-spacing:.5px}
.ai-duo .duo-card h3{color:#0A1726;font-size:18px;margin-bottom:2px;font-weight:700;text-align:center}
.ai-duo .duo-card p{color:var(--body);font-size:14px;line-height:1.65;margin:0;text-align:center}
/* 4 步流程图 */
.ai-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;align-items:start}
.ai-flow .flow-node{
  background:#fff;border:0;border-radius:12px;padding:14px 14px 16px;text-align:center;
  box-shadow:0 6px 18px -10px rgba(0,40,120,.2);
  position:relative;display:flex;flex-direction:column;justify-content:flex-start;align-items:center;
}
.ai-flow .flow-node .step-n{
  display:block;width:max-content;max-width:80%;font-size:10.5px;font-weight:800;letter-spacing:1.5px;
  color:var(--brand);background:var(--brand-50);
  padding:.25em .85em;border-radius:999px;margin:0 auto 5px;
}
.ai-flow .flow-node .t{font-size:15px;font-weight:700;color:#0A1726;margin-bottom:2px}
.ai-flow .flow-node .d{font-size:12.5px;color:var(--body);line-height:1.5}
.ai-flow .flow-arrow{
  position:absolute;right:-10px;top:50%;transform:translateY(-50%);
  color:var(--brand);font-size:16px;font-weight:700;z-index:3;
}
.ai-panel .ai-foot{text-align:center;margin-top:22px}
.ai-panel .ai-foot .btn-primary{background:#fff;color:var(--brand)}
.ai-panel .ai-foot .btn-primary:hover{background:var(--brand-50)}

/* ---------- Grid & Cards ---------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;transition:all .25s;height:100%;
}
.card:hover{box-shadow:var(--shadow-lg);border-color:var(--brand-200);transform:translateY(-4px)}
.card .ic{
  width:52px;height:52px;border-radius:14px;background:var(--brand-50);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;color:var(--brand);
}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px;margin:0;line-height:1.8}
.card .num{font-size:13px;font-weight:700;color:var(--brand);letter-spacing:1px;margin-bottom:10px;display:block}

/* ---------- Model badges（8 大模型） ---------- */
.model-logo{
  width:80px;height:80px;border-radius:18px;margin:0 auto 14px;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:21px;letter-spacing:.2px;
  box-shadow:0 10px 22px rgba(20,40,90,.14);
}
.model-logo.wide{font-size:14px;letter-spacing:-.2px;padding:0 6px;font-weight:700}

/* ---------- Process steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:step}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px 28px}
.step::before{
  counter-increment:step;content:counter(step);position:absolute;top:-16px;left:28px;
  width:40px;height:40px;border-radius:12px;background:var(--brand);color:#fff;font-weight:800;font-size:16px;
  display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(0,104,224,.3);
}
.step h3{font-size:18px;margin:16px 0 10px}
.step p{color:var(--muted);font-size:14.5px;margin:0;line-height:1.8}
.step .sub{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);font-size:13.5px;color:var(--body)}

/* ---------- Pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 30px;
  display:flex;flex-direction:column;transition:all .25s;
}
.price-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.price-card.featured{border:2px solid var(--brand);box-shadow:var(--shadow-lg);position:relative}
.price-card .badge{
  position:absolute;top:-14px;left:50%;transform:translateX(-50%);
  background:var(--brand);color:#fff;font-size:12px;font-weight:700;padding:.4em 1.2em;border-radius:999px;
}
.price-card h3{font-size:21px;margin-bottom:4px}
.price-card .sub{color:var(--muted);font-size:13.5px;margin-bottom:20px}
.price-card .amount{font-size:36px;font-weight:800;color:var(--brand-700);line-height:1}
.price-card .amount small{font-size:14px;color:var(--muted);font-weight:500}
.price-card ul{list-style:none;padding:0;margin:22px 0;flex:1}
.price-card li{padding:9px 0 9px 26px;position:relative;font-size:14.5px;border-bottom:1px solid var(--bg-soft)}
.price-card li::before{content:"";position:absolute;left:2px;top:15px;width:14px;height:8px;border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);transform:rotate(-45deg)}
.price-card li.off{color:#aab4c0}
.price-card li.off::before{border-color:#cdd6e0}
.price-note{margin-top:24px;font-size:13px;color:var(--muted);text-align:center}

/* ---------- Comparison table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
table.cmp{width:100%;border-collapse:collapse;min-width:640px}
table.cmp th,table.cmp td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--bg-soft);font-size:14.5px}
table.cmp thead th{background:var(--brand);color:#fff;font-weight:700;white-space:nowrap}
table.cmp tbody tr:hover{background:var(--bg-soft)}
table.cmp td:first-child{font-weight:600;color:var(--ink)}

/* ---------- FAQ 手风琴（首页等默认折叠） ---------- */
.faq-item{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:14px;background:#fff;overflow:hidden;scroll-margin-top:96px;transition:box-shadow .2s,border-color .2s}
.faq-q{width:100%;text-align:left;background:none;border:0;padding:20px 24px;font-size:16px;font-weight:700;color:var(--ink);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:14px}
.faq-q:hover{background:var(--brand-50)}
.faq-q .faq-q-text{line-height:1.55}
.faq-q .plus{color:var(--brand);font-size:24px;font-weight:400;line-height:1;transition:transform .25s;flex:0 0 auto}
.faq-item.open{border-color:var(--brand);box-shadow:0 10px 28px rgba(0,104,224,.08)}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-a div{padding:2px 24px 24px;color:var(--body);font-size:15px;line-height:1.9}
.faq-a p{margin:0 0 1em}
.faq-a p:last-child{margin-bottom:0}

/* ---------- FAQ 平铺模式（faq.html 专用：问题下方直接展示答案） ---------- */
.faq-flat .faq-q{cursor:default}
.faq-flat .faq-q:hover{background:none}
.faq-flat .faq-a{max-height:none;overflow:visible;padding:0 24px 24px}

/* FAQ page */
.faq-layout{display:grid;grid-template-columns:270px 1fr;gap:40px;align-items:start}
.faq-index{position:sticky;top:96px}
.faq-index-inner{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px}
.faq-index-title{font-weight:800;color:var(--ink);margin:0 0 14px;font-size:14px;letter-spacing:.5px}
.faq-index ol{list-style:none;margin:0;padding:0;counter-reset:q}
.faq-index li{counter-increment:q;margin:0}
.faq-index li a{display:flex;align-items:flex-start;gap:10px;padding:10px 12px;border-radius:10px;color:var(--body);font-size:14px;line-height:1.5;border-left:3px solid transparent;transition:.18s}
.faq-index li a:hover{background:#fff;color:var(--brand);border-left-color:var(--brand)}
.faq-index li a.active{background:#fff;color:var(--brand-700);border-left-color:var(--brand);font-weight:700}
.faq-index li a::before{content:counter(q);flex:0 0 auto;width:24px;height:24px;line-height:24px;text-align:center;background:var(--brand);color:#fff;border-radius:50%;font-size:12px;margin-top:0}
@media (max-width:860px){.faq-layout{grid-template-columns:1fr;gap:22px}.faq-index{position:static}}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:13.5px;color:var(--muted);padding:20px 0 0}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{margin:0 8px;color:var(--line)}

/* ---------- 内页 hero（蓝底）里的面包屑 ---------- */
.hero .breadcrumb{color:rgba(255,255,255,.72);padding:0 0 16px}
.hero .breadcrumb a{color:rgba(255,255,255,.72)}
.hero .breadcrumb a:hover{color:#fff}
.hero .breadcrumb span{color:rgba(255,255,255,.4)}

/* ---------- 时间线（关于我们发展历程） ---------- */
.timeline{position:relative;max-width:860px;margin:0 auto;padding-left:32px}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:var(--brand-200)}
.tl-item{position:relative;padding:0 0 34px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-32px;top:5px;width:20px;height:20px;border-radius:50%;background:#fff;border:4px solid var(--brand);box-shadow:0 0 0 4px var(--brand-50)}
.tl-item .yr{display:inline-block;font-size:13px;font-weight:800;color:#fff;background:var(--brand);padding:.3em .9em;border-radius:999px;margin-bottom:10px;letter-spacing:.5px}
.tl-item h3{font-size:19px;margin-bottom:8px}
.tl-item p{color:var(--muted);font-size:15px;margin:0;line-height:1.85}

/* ---------- 服务详情行（services） ---------- */
.svc-list{display:grid;gap:20px}
.svc-item{display:flex;gap:22px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:all .25s}
.svc-item:hover{box-shadow:var(--shadow-lg);border-color:var(--brand-200);transform:translateY(-3px)}
.svc-item .ic{flex:0 0 auto;width:56px;height:56px;border-radius:14px;background:var(--brand-50);display:flex;align-items:center;justify-content:center;color:var(--brand)}
.svc-item h3{font-size:20px;margin-bottom:8px}
.svc-item p{color:var(--muted);font-size:15px;line-height:1.85;margin:0}
.svc-item .svc-tags{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px}
.svc-item .svc-tags span{font-size:12.5px;color:var(--brand-700);background:var(--brand-50);border:1px solid var(--brand-100);padding:.28em .8em;border-radius:999px}
@media(max-width:760px){.svc-item{flex-direction:column;gap:16px}}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(120deg,var(--brand-800),var(--brand));color:#fff;border-radius:22px;padding:52px 48px;display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.12) 1px,transparent 1.7px);background-size:30px 30px;-webkit-mask-image:linear-gradient(120deg,rgba(0,0,0,.7),transparent 55%);mask-image:linear-gradient(120deg,rgba(0,0,0,.7),transparent 55%)}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:8px}
.cta-band p{color:rgba(255,255,255,.85);margin:0}
.cta-band .btn-light{background:#fff;color:var(--brand);box-shadow:0 8px 20px rgba(0,0,0,.18)}

/* ---------- Article / Insights ---------- */
.article-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:all .25s}
.article-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.article-card .thumb{height:160px;background:linear-gradient(135deg,var(--brand),var(--brand-700));position:relative;display:flex;align-items:center;justify-content:center}
.article-card .thumb svg{width:64px;height:64px;opacity:.9}
.article-card .body{padding:24px;flex:1;display:flex;flex-direction:column}
.article-card .meta{font-size:12.5px;color:var(--brand);font-weight:700;margin-bottom:10px;letter-spacing:.5px}
.article-card h3{font-size:18px;margin-bottom:10px}
.article-card p{color:var(--muted);font-size:14.5px;flex:1;line-height:1.8}
.article-card .more{margin-top:16px;font-weight:700;font-size:14px}

/* ---------- Stat band ---------- */
.stat-band{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-band .s{border:1px solid var(--line);border-radius:var(--radius);padding:28px 16px;background:#fff}
.stat-band .s strong{display:block;font-size:32px;color:var(--brand);font-weight:800}
.stat-band .s span{font-size:13.5px;color:var(--muted)}

/* ---------- Value list ---------- */
.value-list{display:grid;gap:16px}
.value{border-left:3px solid var(--brand);background:var(--brand-50);padding:18px 22px;border-radius:0 10px 10px 0}
.value h4{font-size:16px;margin-bottom:4px}
.value p{margin:0;color:var(--body);font-size:15px}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-deep);color:#7E93AC;padding:60px 0 28px}
.site-footer .logo-mark{height:180px;width:auto;margin-bottom:18px;filter:drop-shadow(0 2px 6px rgba(0,0,0,.25))}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.5px}
.site-footer a{color:#B9C7D9;font-size:14px}
.site-footer a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;align-items:flex-start}
.foot-grid .desc{font-size:14px;color:#8DA0B8;margin-top:14px;max-width:300px}
.foot-col ul{list-style:none;padding:0;margin:0}
.foot-col li{margin:0 0 10px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:42px;padding-top:22px;font-size:13px;color:#7E93AC;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.foot-beian{margin-top:14px;text-align:center;font-size:12px;color:#7E93AC;letter-spacing:.3px}
.foot-beian a{color:#7E93AC;margin:0 6px;text-decoration:none;transition:color .15s ease}
.foot-beian a:hover{color:#fff;text-decoration:underline}
.foot-beian .sep{color:#3F4D60;margin:0 4px}
.foot-beian svg{width:14px;height:14px;vertical-align:-2px;margin-right:3px}
.foot-contact{font-size:14px;line-height:2}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
  .ai-duo{grid-template-columns:1fr}
  .ai-flow{grid-template-columns:repeat(2,1fr)}
  .ai-flow .flow-arrow{display:none}
  .ai-panel{padding:36px 28px 30px}
  .ai-core-section{padding-top:48px}
}
@media(max-width:760px){
  .nav{height:88px}
  .nav-links{
    position:absolute;top:88px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;padding:8px 16px 16px;display:none;box-shadow:var(--shadow);
  }
  .nav-links.show{display:flex}
  .nav-links a{padding:.85em .5em;border-radius:0;border-bottom:1px solid var(--bg-soft)}
  .nav-links a.active::after{display:none}
  .nav-cta{margin:12px 0 4px}
  .nav-toggle{display:block}
  .brand .logo-mark{height:64px}
  .site-footer .logo-mark{height:150px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .cta-band{padding:36px 26px}
  section{padding:58px 0}
  .stat-band{grid-template-columns:1fr 1fr}
  .ai-panel{padding:30px 20px 26px;border-radius:18px}
  .ai-flow{grid-template-columns:1fr}
  .ai-core-section{padding-top:40px}
}