/* ============================================================
   爱曼智云计算 · AIMANZHI CLOUD
   Global stylesheet — minimal / premium / AI-tech visual system
   ============================================================ */
:root{
  --ink:#0b1020; --ink-2:#151d33; --muted:#5f6a80; --faint:#8b95a9;
  --line:#e9edf6; --bg:#fff; --bg-soft:#f6f8fd; --bg-soft2:#eef3ff;
  --blue:#2e6bff; --violet:#7c5cff; --cyan:#00d4ff;
  --grad:linear-gradient(118deg,#2e6bff 0%,#7c5cff 52%,#00d4ff 100%);
  --grad-soft:linear-gradient(135deg,rgba(46,107,255,.10),rgba(124,92,255,.10) 55%,rgba(0,212,255,.10));
  --night:#070b1c;
  --r:20px; --r-sm:12px;
  --shadow:0 16px 46px rgba(16,32,72,.07);
  --shadow-h:0 26px 64px rgba(24,46,110,.14);
  --maxw:1280px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden;overflow-x:clip}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
svg{width:20px;height:20px;flex:none}
::selection{background:rgba(124,92,255,.22);color:var(--ink)}
.container{width:min(var(--maxw),calc(100% - 48px));margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 26px;border-radius:11px;font-size:16px;font-weight:600;letter-spacing:.2px;border:1px solid transparent;cursor:pointer;transition:.28s cubic-bezier(.2,.7,.3,1);white-space:nowrap}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 30px rgba(75,92,255,.28)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(75,92,255,.42)}
.btn-ghost{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.24);color:#fff;backdrop-filter:blur(8px)}
.btn-ghost:hover{background:rgba(255,255,255,.14);transform:translateY(-3px)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-3px);box-shadow:var(--shadow)}
.btn-lg{padding:16px 32px;font-size:17px;border-radius:12px}
.btn-sm{padding:9px 18px;font-size:16px;border-radius:9px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:200;background:rgba(255,255,255,.86);backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);border-bottom:1px solid rgba(233,237,246,.9);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:0 8px 28px rgba(16,32,72,.07)}
.nav{height:84px;display:flex;align-items:center;gap:26px}
.brand{display:inline-flex;align-items:center;gap:11px;flex:none}
.brand img{width:40px;height:40px;filter:drop-shadow(0 5px 12px rgba(80,90,255,.22));transition:transform .4s}
.brand:hover img{transform:rotate(-8deg) scale(1.06)}
.brand-txt strong{display:block;font-size:19px;font-weight:800;letter-spacing:.4px;line-height:1.25}
.brand-txt small{display:block;font-size:16px;letter-spacing:.4px;color:var(--faint);font-weight:600;line-height:1.4}
.menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.menu>li{position:relative;flex:none}
.menu>li>a,.menu .drop>a{display:inline-flex;align-items:center;gap:5px;padding:9px 10px;font-size:16px;font-weight:500;color:#333e57;border-radius:9px;transition:.22s;white-space:nowrap}
.menu>li>a:hover,.menu .drop>a:hover,.menu>li.active>a{color:var(--blue);background:var(--bg-soft2)}
.menu .caret{width:12px;height:12px;opacity:.6;transition:transform .25s}
.menu>li:hover .caret{transform:rotate(180deg)}
.dropdown{position:absolute;top:calc(100% + 12px);left:0;min-width:190px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-h);padding:8px;opacity:0;visibility:hidden;transform:translateY(-8px);transition:.24s}
.menu>li:hover .dropdown,.menu>li:focus-within .dropdown{opacity:1;visibility:visible;transform:none}
.dropdown::before{content:"";position:absolute;top:-14px;left:0;right:0;height:14px}
.dropdown a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:9px;font-size:16px;color:#3b465e;transition:.2s}
.dropdown a:hover{background:var(--bg-soft2);color:var(--blue);padding-left:16px}
.dropdown a i{width:6px;height:6px;border-radius:50%;background:var(--grad);flex:none}
.nav-cta{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:10px;color:#fff;background:var(--grad);font-size:16px;font-weight:600;box-shadow:0 8px 20px rgba(75,92,255,.24);transition:.25s;flex:none;white-space:nowrap}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(75,92,255,.36)}
.nav-cta svg{width:15px;height:15px}
.engine-link svg,.article-more svg{width:15px;height:15px}
.nav-tel{display:none}
.hamburger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:11px;background:#fff;align-items:center;justify-content:center;cursor:pointer;flex:none}
.hamburger span{display:block;width:19px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:.3s}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:19px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.hamburger span::before{top:-6px}.hamburger span::after{top:6px}
.hamburger.open span{background:transparent}
.hamburger.open span::before{top:0;transform:rotate(45deg)}
.hamburger.open span::after{top:0;transform:rotate(-45deg)}

/* ---------- section basics ---------- */
.section{padding:100px 0;position:relative}
.section.soft{background:var(--bg-soft)}
.section.tint{background:linear-gradient(180deg,#fff 0%,var(--bg-soft2) 100%)}
.section-head{max-width:860px;margin:0 auto 54px;text-align:center}
.section-head.left{text-align:left;margin-left:0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:99px;background:var(--grad-soft);border:1px solid rgba(110,100,255,.14);color:var(--blue);font-size:16px;font-weight:700;letter-spacing:1.4px;margin-bottom:20px}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--grad);box-shadow:0 0 0 4px rgba(110,100,255,.12)}
.h2{font-size:clamp(32px,3.6vw,46px);line-height:1.26;font-weight:800;letter-spacing:-.7px}
.h3{font-size:22px;font-weight:700;line-height:1.45;letter-spacing:-.2px}
.lead{color:var(--muted);font-size:17px;margin-top:16px;line-height:1.85}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.subtle{color:var(--muted)}
.center{text-align:center}
.mt-s{margin-top:18px}.mt-m{margin-top:30px}.mt-l{margin-top:46px}

/* ---------- page hero (inner pages) ---------- */
.page-hero{position:relative;overflow:hidden;padding:76px 0 70px;background:radial-gradient(1000px 420px at 82% -10%,rgba(124,92,255,.12),transparent 62%),radial-gradient(760px 380px at 8% 110%,rgba(0,212,255,.10),transparent 60%),linear-gradient(180deg,#f8faff,#fff)}
.page-hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(46,107,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(46,107,255,.045) 1px,transparent 1px);background-size:44px 44px;mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 90%);pointer-events:none}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{font-size:clamp(32px,4.2vw,54px);font-weight:800;letter-spacing:-1px;line-height:1.22;margin-top:16px}
.page-hero p{color:var(--muted);font-size:16px;max-width:660px;margin-top:16px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:16px;color:var(--faint)}
.crumb a:hover{color:var(--blue)}
.crumb span{opacity:.5}

/* ---------- home hero ---------- */
.hero{position:relative;min-height:660px;display:flex;align-items:center;overflow:hidden;background:var(--night) url("../img/hero-ai.webp") center center/cover no-repeat;color:#fff}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,9,24,.97) 0%,rgba(6,10,28,.90) 34%,rgba(6,10,28,.48) 62%,rgba(6,10,28,.05) 88%),linear-gradient(0deg,rgba(5,9,24,.75),transparent 42%)}
.hero::after{content:"";position:absolute;top:-30%;left:-10%;width:60%;height:160%;background:radial-gradient(circle,rgba(70,80,255,.14),transparent 65%);pointer-events:none}
.hero .container{position:relative;z-index:3;padding-top:78px;padding-bottom:78px}
.hero-body{max-width:720px}
.hero-badge{display:inline-flex;align-items:center;gap:9px;padding:7px 16px 7px 8px;border:1px solid rgba(140,170,255,.24);border-radius:99px;background:rgba(255,255,255,.05);font-size:16px;letter-spacing:.6px;color:#cfdbff;backdrop-filter:blur(8px)}
.hero-badge b{display:inline-block;padding:3px 9px;border-radius:99px;background:var(--grad);color:#fff;font-size:16px;font-weight:700;white-space:nowrap}
.hero h1{font-size:clamp(38px,5.4vw,66px);font-weight:800;line-height:1.18;letter-spacing:-1.6px;margin-top:26px}
.hero h1 .grad-text{filter:drop-shadow(0 4px 22px rgba(90,120,255,.35))}
.hero h1 .h1-city{display:block;font-size:24px;font-style:normal;font-weight:700;letter-spacing:1px;line-height:1.2;margin-bottom:2px;color:#9ce8ff;white-space:nowrap}
.hero h1 .grad-text{white-space:nowrap}
.hero-sub{margin-top:22px;font-size:18px;line-height:1.9;color:#b9c5e2;max-width:660px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.hero-tags span{font-size:16px;color:#9aabcf;border:1px solid rgba(150,175,255,.16);border-radius:7px;padding:7px 13px;background:rgba(255,255,255,.03)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:62px;padding-top:28px;border-top:1px solid rgba(255,255,255,.11)}
.hero-stats div{padding-left:22px;border-left:1px solid rgba(255,255,255,.12)}
.hero-stats div:first-child{padding-left:0;border-left:0}
.hero-stats b{display:block;font-size:29px;font-weight:800;line-height:1.2;letter-spacing:-.5px;background:linear-gradient(120deg,#fff,#9fc4ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats small{display:block;font-size:16px;color:#93a3c6;margin-top:4px}
.scroll-hint{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);z-index:4;width:22px;height:36px;border:1.5px solid rgba(255,255,255,.3);border-radius:14px;display:grid;justify-items:center;padding-top:7px;opacity:.65}
.scroll-hint::after{content:"";width:3px;height:7px;border-radius:3px;background:#fff;animation:scrolldot 1.8s infinite}
@keyframes scrolldot{0%{transform:translateY(0);opacity:1}70%{transform:translateY(10px);opacity:0}100%{opacity:0}}

/* ---------- logo / trust strip ---------- */
.trust{padding:30px 0;background:#fff;border-bottom:1px solid var(--line)}
.trust-in{display:flex;align-items:center;gap:34px;flex-wrap:wrap;justify-content:center}
.trust-label{font-size:16px;color:var(--faint);letter-spacing:1px;flex:none}
.chip{display:inline-flex;align-items:center;gap:7px;padding:8px 16px;border:1px solid var(--line);border-radius:9px;background:var(--bg-soft);font-size:16px;font-weight:600;color:#48546d;transition:.25s}
.chip:hover{border-color:rgba(46,107,255,.35);color:var(--blue);transform:translateY(-2px);background:#fff}
.chip i{width:7px;height:7px;border-radius:50%;background:var(--grad)}

/* ---------- cards ---------- */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px;box-shadow:var(--shadow);overflow:hidden;transition:.35s cubic-bezier(.2,.7,.3,1)}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:.4s}
.card:hover{transform:translateY(-7px);box-shadow:var(--shadow-h);border-color:rgba(110,120,255,.2)}
.card:hover::before{transform:scaleX(1)}
.card h3{margin-top:20px}
.card p{color:var(--muted);font-size:16px;margin-top:10px;line-height:1.85}
.icon-box{width:52px;height:52px;border-radius:14px;background:var(--grad-soft);display:grid;place-items:center;color:var(--blue);border:1px solid rgba(110,100,255,.10)}
.icon-box svg{width:25px;height:25px}
.card-num{position:absolute;right:22px;top:16px;font-size:46px;font-weight:800;color:rgba(46,107,255,.055);line-height:1}
.mini-list{margin-top:16px;display:grid;gap:9px}
.mini-list li{display:flex;align-items:flex-start;gap:9px;font-size:16px;color:#4a5670;line-height:1.6}
.mini-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--grad);margin-top:8px;flex:none}

/* ---------- dual engine ---------- */
.engine{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.engine-card{position:relative;border-radius:24px;overflow:hidden;min-height:430px;display:flex;flex-direction:column;justify-content:flex-end;padding:38px;color:#fff;isolation:isolate;transition:.4s}
.engine-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-h)}
.engine-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;transition:transform .8s}
.engine-card:hover img{transform:scale(1.07)}
.engine-card::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(5,9,24,.95) 0%,rgba(5,9,24,.62) 48%,rgba(5,9,24,.08) 100%);z-index:-1}
.engine-tag{position:absolute;top:24px;left:38px;padding:8px 16px;border-radius:99px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.24);backdrop-filter:blur(10px);font-size:16px;letter-spacing:1.4px;font-weight:700}
.engine-card h3{font-size:26px;font-weight:800;letter-spacing:-.4px}
.engine-card p{color:#c4d0ea;font-size:16px;margin-top:12px;line-height:1.85}
.engine-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.engine-points span{font-size:16px;padding:7px 13px;border-radius:7px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.14)}
.engine-link{display:inline-flex;align-items:center;gap:8px;margin-top:24px;font-size:16px;font-weight:600;color:#8fc4ff;transition:.25s}
.engine-link:hover{gap:14px;color:#fff}

/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.split.reverse .split-visual{order:2}
.split-visual{position:relative}
.split-visual img{border-radius:22px;box-shadow:var(--shadow-h);width:100%;object-fit:cover;aspect-ratio:4/3}
.split-visual::before{content:"";position:absolute;inset:-18px 22px 22px -18px;border-radius:26px;background:var(--grad-soft);z-index:-1}
.float-card{position:absolute;right:-22px;bottom:28px;background:#fff;border:1px solid var(--line);border-radius:15px;padding:16px 20px;box-shadow:var(--shadow-h);display:flex;align-items:center;gap:12px;min-width:190px}
.float-card .icon-box{width:40px;height:40px;border-radius:11px}
.float-card .icon-box svg{width:20px;height:20px}
.float-card b{display:block;font-size:17px;line-height:1.3}
.float-card small{color:var(--muted);font-size:16px}
.check-list{display:grid;gap:15px;margin-top:28px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:16px;color:#3d4962;line-height:1.7}
.check-list .tick{width:22px;height:22px;border-radius:50%;background:var(--grad-soft);color:var(--blue);display:grid;place-items:center;flex:none;margin-top:2px}
.check-list .tick svg{width:13px;height:13px}
/* AI广告短剧服务介绍板块 */
.ai-intro-card{display:flex;flex-direction:column}
.ai-intro-card .icon-box{width:48px;height:48px;border-radius:13px}
.ai-intro-card .icon-box svg{width:23px;height:23px}
.ai-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:22px}
.ai-tags span{font-size:16px;padding:6px 12px;border-radius:8px;background:var(--grad-soft);color:var(--blue);font-weight:600}

/* ---------- counters ---------- */
.counters{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.counter{padding:30px 16px;border-radius:var(--r);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.counter b{display:block;font-size:clamp(30px,4vw,46px);font-weight:800;line-height:1.15;letter-spacing:-1px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.counter small{display:block;color:var(--muted);font-size:16px;margin-top:8px}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.steps::before{content:"";position:absolute;top:34px;left:11%;right:11%;height:2px;background:linear-gradient(90deg,rgba(46,107,255,.18),rgba(124,92,255,.35),rgba(0,212,255,.2));z-index:0}
.step{position:relative;z-index:1;text-align:center;padding:0 8px}
.step .dot{width:68px;height:68px;margin:0 auto 22px;border-radius:50%;display:grid;place-items:center;background:#fff;border:1px solid var(--line);box-shadow:0 10px 26px rgba(30,50,110,.1);font-size:20px;font-weight:800;color:var(--blue);transition:.35s}
.step:hover .dot{background:var(--grad);color:#fff;transform:translateY(-5px) scale(1.05);box-shadow:0 16px 32px rgba(75,92,255,.3)}
.step h4{font-size:16px;font-weight:700}
.step p{font-size:16px;color:var(--muted);margin-top:8px;line-height:1.7}

/* ---------- industries / tags ---------- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.tag-cloud a,.tag-cloud span{padding:11px 22px;border-radius:11px;border:1px solid var(--line);background:#fff;font-size:16px;font-weight:600;color:#47536c;transition:.25s}
.tag-cloud a:hover{background:var(--grad);color:#fff;border-color:transparent;transform:translateY(-3px);box-shadow:0 12px 26px rgba(75,92,255,.25)}
.industry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.industry{display:flex;align-items:center;gap:13px;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:#fff;transition:.28s}
.industry:hover{border-color:rgba(46,107,255,.4);transform:translateY(-4px);box-shadow:var(--shadow)}
.industry .icon-box{width:42px;height:42px;border-radius:11px}
.industry .icon-box svg{width:20px;height:20px}
.industry b{font-size:16px;display:block}
.industry small{font-size:16px;color:var(--faint)}

/* ---------- reviews ---------- */
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px;box-shadow:var(--shadow);transition:.35s;display:flex;flex-direction:column}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h)}
.stars{color:#ffb020;font-size:16px;letter-spacing:2px}
.review-card blockquote{margin:16px 0 22px;font-size:16px;line-height:1.9;color:#3f4b63;flex:1}
.reviewer{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);padding-top:18px}
.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:16px;background:var(--grad);flex:none}
.reviewer b{display:block;font-size:16px}
.reviewer small{display:block;color:var(--faint);font-size:16px}

/* ---------- pricing ---------- */
.price-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:34px 30px;box-shadow:var(--shadow);transition:.35s;display:flex;flex-direction:column}
.price-card:hover{transform:translateY(-7px);box-shadow:var(--shadow-h)}
.price-card.hot{border:1.5px solid transparent;background:linear-gradient(#fff,#fff) padding-box,var(--grad) border-box;box-shadow:0 20px 50px rgba(75,92,255,.16)}
.price-ribbon{position:absolute;top:-16px;left:50%;transform:translateX(-50%);padding:7px 18px;border-radius:99px;background:var(--grad);color:#fff;font-size:16px;font-weight:700;letter-spacing:.5px;white-space:nowrap}
.price-card h3{font-size:19px}
.price{font-size:40px;font-weight:800;letter-spacing:-1px;margin:14px 0 4px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.price small{font-size:16px;font-weight:500;color:var(--faint);-webkit-text-fill-color:var(--faint)}
.price .price-from{font-size:16px;font-weight:600;font-style:normal;color:var(--faint);-webkit-text-fill-color:var(--faint);margin-left:8px;letter-spacing:1px}
.price-card .mini-list{margin-top:22px;flex:1}
.contact-note{display:block;font-size:16px;color:var(--faint);margin-top:6px}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;margin-inline:auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.28s}
.faq-item[open]{border-color:rgba(46,107,255,.3);box-shadow:var(--shadow)}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 24px;display:flex;align-items:center;gap:14px;font-size:16px;font-weight:650;color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-q{flex:none;width:30px;height:30px;border-radius:8px;background:var(--grad-soft);color:var(--blue);display:grid;place-items:center;font-size:16px;font-weight:800}
.faq-item summary::after{content:"+";margin-left:auto;font-size:22px;font-weight:300;color:var(--blue);transition:.3s;line-height:1}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 24px 22px 64px;color:var(--muted);font-size:16px;line-height:1.9}

/* ---------- article cards ---------- */
.article-card{display:block;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);transition:.35s;height:100%}
.article-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h)}
.article-thumb{height:170px;background:var(--grad);position:relative;overflow:hidden;display:grid;place-items:center;color:#fff}
.article-thumb::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.24) 1px,transparent 1px);background-size:20px 20px;opacity:.55}
.article-thumb span{position:relative;z-index:2;font-size:38px;font-weight:800;letter-spacing:-2px;opacity:.9}
.article-thumb.b2{background:linear-gradient(120deg,#0a2a6b,#2e6bff)}
.article-thumb.b3{background:linear-gradient(120deg,#3b1d80,#00a2d4)}
.article-thumb.b4{background:linear-gradient(120deg,#062b3a,#7c5cff)}
.article-thumb.b5{background:linear-gradient(120deg,#2e6bff,#00d4ff)}
.article-thumb.b6{background:linear-gradient(120deg,#4b2b8f,#2e6bff)}
.article-body{padding:24px}
.article-meta{font-size:16px;color:var(--faint);display:flex;gap:12px;align-items:center}
.article-body h3{font-size:17px;line-height:1.5;margin-top:10px}
.article-body p{font-size:16px;color:var(--muted);margin-top:10px;line-height:1.8}
.article-more{display:inline-flex;align-items:center;gap:6px;color:var(--blue);font-size:16px;font-weight:600;margin-top:16px}

/* ---------- article content ---------- */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:52px;align-items:start}
.prose{font-size:17px;line-height:2;color:#3c4760}
.prose h2{font-size:26px;font-weight:800;color:var(--ink);margin:42px 0 16px;padding-left:15px;border-left:4px solid var(--blue)}
.prose h3{font-size:19px;font-weight:700;color:var(--ink);margin:30px 0 12px}
.prose p{margin-bottom:18px}
.prose ul{margin:0 0 20px;padding-left:0;display:grid;gap:10px}
.prose ul li{position:relative;padding-left:22px}
.prose ul li::before{content:"";position:absolute;left:2px;top:13px;width:7px;height:7px;border-radius:50%;background:var(--grad)}
.prose .note{background:var(--bg-soft2);border-left:3px solid var(--blue);padding:18px 22px;border-radius:0 12px 12px 0;margin:24px 0;color:#3a4763}
.side-box{background:var(--bg-soft);border:1px solid var(--line);border-radius:18px;padding:26px;position:sticky;top:100px}
.side-box h4{font-size:16px;font-weight:700;margin-bottom:16px}
.side-box a{display:block;padding:10px 0;border-bottom:1px dashed var(--line);font-size:16px;color:#4a5670;transition:.2s}
.side-box a:hover{color:var(--blue);padding-left:6px}
.side-box a:last-child{border-bottom:0}
.side-cta{margin-top:22px;padding:22px;border-radius:14px;background:var(--grad);color:#fff;text-align:center}
.side-cta b{display:block;font-size:16px}
.side-cta small{display:block;opacity:.85;font-size:16px;margin:6px 0 14px}

/* ---------- areas ---------- */
.area-province{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;transition:.3s}
.area-province:hover{border-color:rgba(46,107,255,.35);box-shadow:var(--shadow)}
.area-province h3{font-size:16px;font-weight:700;display:flex;align-items:center;gap:10px;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:14px}
.area-province h3 i{width:8px;height:8px;border-radius:50%;background:var(--grad)}
.city-links{display:flex;flex-wrap:wrap;gap:8px}
.city-links a{font-size:16px;color:#52607c;padding:7px 12px;border-radius:7px;background:var(--bg-soft);transition:.22s}
.city-links a:hover{background:var(--grad);color:#fff;transform:translateY(-2px)}
.area-hero-card{border-radius:22px;background:linear-gradient(125deg,#081127,#152a63 60%,#3b2a8c);color:#fff;padding:46px;position:relative;overflow:hidden}
.area-hero-card::after{content:"";position:absolute;right:-80px;top:-80px;width:340px;height:340px;border-radius:50%;border:1px solid rgba(140,180,255,.22);box-shadow:0 0 0 50px rgba(140,180,255,.05),0 0 0 110px rgba(140,180,255,.035)}
.area-hero-card h2{font-size:30px;font-weight:800;position:relative;z-index:2}
.area-hero-card p{color:#b9c8ea;margin-top:14px;max-width:560px;position:relative;z-index:2}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.contact-card{display:flex;gap:18px;padding:26px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow);transition:.3s}
.contact-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-h)}
.contact-card .icon-box{width:48px;height:48px}
.contact-card small{display:block;color:var(--faint);font-size:16px;letter-spacing:1px}
.contact-card b{display:block;font-size:18px;margin-top:5px;word-break:break-all}
.contact-card a:hover{color:var(--blue)}
.form-box{background:#fff;border:1px solid var(--line);border-radius:22px;padding:36px;box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field label{display:block;font-size:16px;font-weight:600;color:#48546d;margin-bottom:7px}
.field input,.field textarea,.field select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--bg-soft);font-size:16px;outline:none;transition:.25s;color:var(--ink)}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(46,107,255,.09)}
.field{margin-bottom:16px}
.field textarea{resize:vertical;min-height:110px}
.form-note{font-size:16px;color:var(--faint);margin-top:12px}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(115deg,#070d24,#111f4d 55%,#2a1e68);color:#fff;padding:88px 0;text-align:center}
.cta-band::before{content:"";position:absolute;left:50%;top:50%;width:800px;height:800px;transform:translate(-50%,-50%);background:radial-gradient(circle,rgba(80,110,255,.25),transparent 62%);pointer-events:none}
.cta-band::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(circle,#000,transparent 75%);pointer-events:none}
.cta-band .container{position:relative;z-index:2}
.cta-band h2{font-size:clamp(30px,3.8vw,46px);font-weight:800;letter-spacing:-.8px;line-height:1.3}
.cta-band p{color:#b6c4e6;margin-top:16px;font-size:16px}
.cta-band .hero-actions{justify-content:center;margin-top:30px}
.cta-tel{display:inline-flex;align-items:center;gap:10px;margin-top:22px;color:#a9bce6;font-size:16px}
.cta-tel b{color:#fff;font-size:19px;letter-spacing:.5px}

/* ---------- footer ---------- */
.site-footer{background:#060a18;color:#94a2c0;padding:72px 0 0;font-size:16px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.25fr;gap:44px;padding-bottom:52px}
.footer-brand .brand-txt strong{color:#fff}
.footer-brand p{color:#7f8dab;margin-top:20px;line-height:1.9;max-width:330px;font-size:16px}
.site-footer h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:20px;letter-spacing:.5px}
.site-footer li{margin-bottom:11px}
.site-footer li a{color:#8b99b8;transition:.22s;font-size:16px}
.site-footer li a:hover{color:#7fb0ff;padding-left:4px}
.footer-contact p{display:flex;gap:11px;margin-bottom:14px;line-height:1.7;color:#8b99b8}
.footer-contact svg{width:16px;height:16px;margin-top:5px;color:#6d8dff}
.footer-contact b{color:#dce6ff;font-weight:600}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#64718e;font-size:16px}
.footer-bottom a:hover{color:#9db9ff}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.footer-tags span{font-size:16px;padding:6px 12px;border:1px solid rgba(255,255,255,.1);border-radius:6px;color:#7786a6}

/* ---------- floating tools ---------- */
.float-tools{position:fixed;right:20px;bottom:26px;z-index:150;display:grid;gap:10px}
.float-tools a,.float-tools button{width:46px;height:46px;border-radius:13px;border:1px solid var(--line);background:#fff;box-shadow:0 8px 24px rgba(20,35,80,.14);display:grid;place-items:center;cursor:pointer;transition:.28s;color:var(--blue)}
.float-tools a:hover,.float-tools button:hover{background:var(--grad);color:#fff;transform:translateY(-3px)}
.float-tools svg{width:20px;height:20px}
#toTop{opacity:0;visibility:hidden}
#toTop.show{opacity:1;visibility:visible}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .75s cubic-bezier(.2,.7,.3,1),transform .75s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
.reveal.instant,.reveal.instant.in{opacity:1;transform:none;transition:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}

/* ---------- responsive ---------- */
@media(max-width:1280px){
  .nav{gap:14px}
  .menu>li>a,.menu .drop>a{padding:8px 7px;font-size:16px}
  .nav-cta{display:none}
  .nav-tel{display:inline-flex;align-items:center;gap:7px;font-size:16px;font-weight:700;color:var(--blue);white-space:nowrap}
  .nav-tel svg{width:15px;height:15px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-grid>div:last-child{grid-column:1/-1}
}
@media(max-width:1200px){
  .nav-tel{display:none}
  .menu>li>a,.menu .drop>a{padding:8px 6px}
}
@media(max-width:1100px){
  .hamburger{display:flex;margin-left:auto}
  .nav-tel{display:none}
  .menu{position:fixed;top:84px;left:0;right:0;bottom:0;background:#fff;display:block;overflow-y:auto;padding:18px 24px 90px;transform:translateX(26px);opacity:0;visibility:hidden;pointer-events:none;transition:transform .35s cubic-bezier(.2,.7,.3,1),opacity .28s,visibility .28s;box-shadow:-10px 0 40px rgba(10,20,50,.1)}
  .menu.open{transform:none;opacity:1;visibility:visible;pointer-events:auto}
  .menu>li{border-bottom:1px solid var(--line)}
  .menu>li>a,.menu .drop>a{display:flex;justify-content:space-between;width:100%;padding:15px 4px;font-size:16px;font-weight:600}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 12px 12px;background:transparent;display:grid;grid-template-columns:1fr 1fr;gap:4px}
  .dropdown::before{display:none}
  .dropdown a{font-size:16px;padding:9px 12px;background:var(--bg-soft)}
  .dropdown a:hover{padding-left:12px}
  .menu .caret{transform:rotate(180deg)}
  .section{padding:72px 0}
  .g3,.g4,.industry-grid,.counters,.steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .engine,.split,.article-layout,.contact-grid{grid-template-columns:1fr;gap:34px}
  .split.reverse .split-visual{order:0}
  .split-visual{max-width:600px}
  .article-layout{display:block}
  .side-box{position:static;margin-top:38px}
  .hero{min-height:600px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:20px 0}
  .hero-stats div:nth-child(3){padding-left:0;border-left:0}
  .float-card{right:0}
}
@media(max-width:640px){
  .container{width:calc(100% - 32px)}
  .section{padding:58px 0}
  .section-head{margin-bottom:36px}
  .h2{font-size:30px}
  .lead{font-size:17px}
  .g2,.g3,.g4,.industry-grid,.counters,.steps,.form-row{grid-template-columns:1fr}
  .counters{gap:14px}
  .ai-tags{padding-top:16px}
  .hero{min-height:auto;padding:30px 0 42px;background-position:68% center}
  .hero .container{width:calc(100% - 32px);padding-top:30px;padding-bottom:30px}
  .hero-body{width:100%;max-width:100%}
  .hero h1{font-size:32px;letter-spacing:-1px;max-width:100%;overflow-wrap:anywhere}
  .hero h1 .h1-city{font-size:16px;margin-bottom:0}
  .hero-sub{font-size:16.5px;max-width:100%;overflow-wrap:anywhere;word-break:break-word}
  .hero::before{background:linear-gradient(90deg,rgba(5,9,24,.95),rgba(5,9,24,.74)),linear-gradient(0deg,rgba(5,9,24,.62),transparent 52%)}
  .hero-actions,.hero-tags,.hero-stats{max-width:100%}
  .hero-actions .btn{width:100%}
  .hero-tags span{max-width:100%}
  .hero-stats{margin-top:36px}
  .hero-stats b{font-size:24px}
  .scroll-hint{display:none}
  .page-hero{padding:52px 0 46px}
  .card,.price-card,.review-card{padding:24px}
  .engine-card{min-height:360px;padding:28px}
  .engine-tag{left:28px;top:22px}
  .engine-card h3{font-size:22px}
  .split-visual::before{display:none}
  .float-card{position:static;margin-top:14px}
  .faq-item .faq-a{padding:0 20px 20px 20px}
  .faq-item summary{padding:17px 18px;font-size:16px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-grid>div:first-child{grid-column:1/-1}
  .area-hero-card{padding:30px 24px}
  .area-hero-card h2{font-size:24px}
  .cta-band{padding:64px 0}
  .float-tools{right:12px;bottom:12px;display:block}
  .float-tools a:first-child,.float-tools #toTop{display:none}
  .float-tools a,.float-tools button{width:44px;height:44px;border-radius:50%;opacity:.94}
  .form-box{padding:24px}
  .trust-in{gap:10px}
  .chip{padding:6px 11px;font-size:16px}
}
/* ---------- 对比板块：GEO代运营优势 VS 传统推广劣势 ---------- */
.cmp{background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.cmp-head,.cmp-row{display:grid;grid-template-columns:1fr 1fr}
.cmp-head{position:relative;background:#f8fafd;border-bottom:1px solid var(--line)}
.cmp-head>div{padding:17px 28px;font-size:16px;font-weight:800;letter-spacing:.5px}
.cmp-h-new{background:linear-gradient(118deg,rgba(46,107,255,.13),rgba(124,92,255,.13));color:var(--blue)}
.cmp-h-old{color:var(--faint);padding-left:42px}
.cmp-vs{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;width:48px;height:48px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:0 6px 18px rgba(16,32,72,.13);display:grid;place-items:center;font-size:16px;font-weight:900;letter-spacing:.6px;color:var(--violet)}
.cmp-row{border-bottom:1px solid var(--line)}
.cmp-row:last-child{border-bottom:0}
.cmp-topic{grid-column:1/-1;display:flex;align-items:center;gap:10px;padding:11px 24px;background:#fcfdff;border-bottom:1px solid var(--line);font-size:16px;font-weight:700;color:#4b5872;letter-spacing:.3px}
.cmp-ico{border-radius:8px;background:var(--grad-soft);color:var(--blue);display:grid;place-items:center;flex:none;width:26px;height:26px}
.cmp-ico svg{width:15px;height:15px}
.cmp-new,.cmp-old{padding:18px 28px;font-size:16px;line-height:1.7;display:flex;align-items:center;gap:11px}
.cmp-new{color:var(--ink);font-weight:600;background:linear-gradient(100deg,rgba(46,107,255,.06),rgba(0,212,255,.05));border-right:1px solid rgba(46,107,255,.14)}
.cmp-old{color:var(--muted);background:#fbfcfe}
.cmp-new i,.cmp-old i{width:20px;height:20px;border-radius:50%;font-size:16px;font-style:normal;display:grid;place-items:center;flex:none}
.cmp-new i{background:var(--grad);color:#fff}
.cmp-old i{background:#e8ecf5;color:#93a0b8}
.cmp-punch{margin-top:22px;padding:22px 26px;border-radius:var(--r-sm);background:var(--night);color:#fff;display:flex;align-items:center;gap:20px;position:relative;overflow:hidden}
.cmp-punch::after{content:"";position:absolute;right:-40px;top:-70px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(124,92,255,.45),transparent 70%);pointer-events:none}
.cmp-punch span{flex:none;padding:5px 13px;border-radius:99px;background:rgba(255,255,255,.12);font-size:16px;font-weight:700;letter-spacing:1px}
.cmp-punch p{font-size:16px;line-height:1.8;position:relative;z-index:1}
.cmp-punch b{color:#9ce8ff;font-weight:800}
.cmp-worry{display:flex;gap:16px;align-items:flex-start;padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);box-shadow:var(--shadow)}
.cmp-worry .icon-box{width:44px;height:44px;border-radius:12px;flex:none}
.cmp-worry .icon-box svg{width:22px;height:22px}
.cmp-worry b{display:block;font-size:16px;margin-bottom:5px}
.cmp-worry p{font-size:16px;color:var(--muted);line-height:1.7}
@media(max-width:860px){
  .cmp-head{display:none}
  .cmp-row{display:block;padding:4px 0}
  .cmp-topic{padding:14px 18px 8px;background:none;border:0;font-size:16px}
  .cmp-new,.cmp-old{margin:0 14px;border:0;border-radius:9px;padding:12px 14px;display:block;font-size:16px}
  .cmp-new::before,.cmp-old::before{content:attr(data-label);display:block;margin-bottom:4px;font-size:16px;font-weight:800;letter-spacing:.6px;color:var(--blue)}
  .cmp-old::before{color:var(--faint)}
  .cmp-new i,.cmp-old i{display:none}
  .cmp-punch{flex-direction:column;align-items:flex-start;gap:12px;padding:22px}
  .cmp-punch p{font-size:16px}
}
@media(max-width:640px){
  .cmp-topic{padding-left:16px;padding-right:16px}
  .cmp-new,.cmp-old{margin:0 12px}
  .cmp-worry{padding:20px}
  .cmp-punch p{font-size:16px}
}
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}.reveal{opacity:1;transform:none}}