/* ===========================================================
   AI 企业软件定制开发 · 独立站样式 v2
   容器 1400px ｜ 大标题 70/60/50 ｜ 正文 16px 起步
   =========================================================== */

:root{
  --brand:#1d4ed8;
  --brand-2:#3b82f6;
  --brand-deep:#0e2a6b;
  --navy:#0a1836;
  --ink:#0f172a;
  --ink-2:#334155;
  --muted:#64748b;
  --line:#e6ecf7;
  --soft:#f5f8ff;
  --soft-2:#eef4ff;
  --white:#fff;

  --fs-h1:70px;
  --fs-h2:60px;
  --fs-h3:50px;
  --fs-h4:26px;
  --fs-h5:20px;
  --fs-lead:20px;
  --fs-body:18px;
  --fs-text:16px;
  --fs-nav:17px;

  --radius:18px;
  --radius-sm:12px;
  --shadow-sm:0 2px 10px rgba(16,42,94,.06);
  --shadow:0 10px 30px rgba(16,42,94,.08);
  --shadow-lg:0 24px 60px rgba(13,38,86,.14);
  --maxw:1400px;
  --gutter:40px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--white);
  font-size:var(--fs-body);line-height:1.8;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
h1,h2,h3,h4,h5{line-height:1.2;font-weight:700;letter-spacing:-.02em}
h1{font-size:var(--fs-h1)}
h2{font-size:var(--fs-h2)}
h3{font-size:var(--fs-h3)}
h4{font-size:var(--fs-h4);letter-spacing:-.01em;line-height:1.35}
h5{font-size:var(--fs-h5);letter-spacing:0;line-height:1.4}
p{font-size:var(--fs-body)}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.section{padding:120px 0}
.grad{
  background:linear-gradient(100deg,#1d4ed8 0%,#3b82f6 50%,#0ea5e9 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ---------- 通用组件 ---------- */
.eyebrow{
  display:inline-block;font-size:var(--fs-text);font-weight:600;letter-spacing:.06em;
  color:var(--brand);margin-bottom:20px;
}
.eyebrow.light{color:#8ab4ff}
.sec-head{max-width:1000px;margin-bottom:64px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head h2{margin-bottom:22px;text-wrap:balance}
.sec-sub{font-size:var(--fs-lead);color:var(--muted);line-height:1.75}
.sec-head.center .sec-sub{max-width:760px;margin:0 auto}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:60px;padding:0 38px;border-radius:14px;
  font-size:var(--fs-body);font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:.25s;white-space:nowrap;
}
.btn-primary{background:linear-gradient(100deg,#1d4ed8,#3b82f6);color:#fff;box-shadow:0 12px 28px rgba(29,78,216,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 38px rgba(29,78,216,.34)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--brand-deep);box-shadow:0 12px 28px rgba(0,0,0,.18)}
.btn-white:hover{transform:translateY(-2px)}
.btn.sm{height:52px;padding:0 28px;font-size:var(--fs-text)}

.chip{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--soft-2);color:var(--brand-deep);
  border:1px solid #d9e6ff;border-radius:999px;
  padding:9px 20px;font-size:var(--fs-text);font-weight:600;margin-bottom:26px;
}
.chip .dot{width:8px;height:8px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 4px rgba(59,130,246,.18)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:200;
  background:rgba(255,255,255,.9);backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid transparent;transition:.25s;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 4px 20px rgba(16,42,94,.06)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:88px;gap:24px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{
  width:44px;height:44px;border-radius:13px;color:#fff;
  background:linear-gradient(135deg,#1d4ed8,#38bdf8);
  display:grid;place-items:center;box-shadow:0 6px 16px rgba(29,78,216,.3);
}
.logo-mark svg{width:25px;height:25px}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:19px;letter-spacing:.01em}
.logo-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.06em}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-links>a{
  font-size:var(--fs-nav);color:var(--ink-2);padding:10px 14px;border-radius:10px;
  white-space:nowrap;transition:.2s;font-weight:500;
}
.nav-links>a:hover{color:var(--brand);background:var(--soft-2)}
.nav-cta{
  margin-left:14px;height:46px;padding:0 24px;border-radius:12px;
  background:linear-gradient(100deg,#1d4ed8,#3b82f6);color:#fff !important;
  font-weight:600;display:inline-flex;align-items:center;
  box-shadow:0 6px 16px rgba(29,78,216,.26);
}
.nav-cta:hover{filter:brightness(1.08)}
.hamburger{
  display:none;width:48px;height:48px;border:1px solid var(--line);border-radius:12px;
  background:#fff;cursor:pointer;padding:13px 11px;flex-direction:column;justify-content:space-between;
}
.hamburger span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.hamburger.on span:nth-child(1){transform:translateY(9px) rotate(45deg)}
.hamburger.on span:nth-child(2){opacity:0}
.hamburger.on span:nth-child(3){transform:translateY(-9px) rotate(-45deg)}

/* ---------- HERO ---------- */
.hero{position:relative;padding:88px 0 96px;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(60% 55% at 78% 18%,rgba(59,130,246,.16),transparent 65%),
    radial-gradient(50% 45% at 12% 8%,rgba(14,165,233,.12),transparent 60%),
    linear-gradient(180deg,#f7faff 0%,#ffffff 60%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(29,78,216,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(29,78,216,.05) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(70% 60% at 60% 30%,#000,transparent 75%);
  -webkit-mask-image:radial-gradient(70% 60% at 60% 30%,#000,transparent 75%);
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.04fr 1fr;gap:64px;align-items:center}
.hero-copy h1{line-height:1.1;margin-bottom:26px}
.hero-sub{font-size:var(--fs-lead);color:var(--ink-2);max-width:620px;margin-bottom:36px;line-height:1.75}
.hero-sub b{color:var(--brand-deep)}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:32px}
.hero-tags{display:flex;flex-wrap:wrap;gap:12px}
.hero-tags li{
  font-size:var(--fs-text);color:var(--ink-2);background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:8px 18px;box-shadow:var(--shadow-sm);
}

.hero-visual{position:relative}
.hero-img-wrap{
  border-radius:26px;overflow:hidden;background:#fff;
  box-shadow:var(--shadow-lg);border:1px solid #e8eefb;
}
.hero-img-wrap img{width:100%;height:auto}
.float-card{
  position:absolute;display:flex;align-items:center;gap:12px;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:12px 18px;box-shadow:var(--shadow);animation:float 5s ease-in-out infinite;
}
.float-card strong{display:block;font-size:var(--fs-text)}
.float-card em{font-style:normal;font-size:14px;color:var(--muted)}
.fc-icon{
  width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  background:var(--soft-2);color:var(--brand);font-size:12px;font-weight:700;
}
.fc-icon.ai{background:linear-gradient(135deg,#1d4ed8,#38bdf8);color:#fff}
.fc-1{top:8%;left:-44px}
.fc-2{bottom:16%;left:-36px;animation-delay:1.1s}
.fc-3{top:44%;right:-36px;animation-delay:2.2s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

.trust-strip{
  position:relative;z-index:1;
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:72px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;
}
.trust-strip li{padding:28px 32px;border-right:1px solid var(--line)}
.trust-strip li:last-child{border-right:0}
.trust-strip b{display:block;font-size:var(--fs-text);margin-bottom:6px}
.trust-strip span{font-size:16px;color:var(--muted);line-height:1.6}

/* ---------- 客户痛点 ---------- */
.pain{padding-top:110px}
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.pain-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 32px;box-shadow:var(--shadow-sm);transition:.25s;position:relative;overflow:hidden;
}
.pain-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cddcf8}
.pnum{
  display:inline-grid;place-items:center;width:40px;height:40px;border-radius:12px;
  background:var(--soft-2);color:var(--brand);font-size:var(--fs-text);font-weight:700;margin-bottom:18px;
}
.pain-card h4{margin-bottom:12px}
.pain-card p{font-size:16px;color:var(--muted);line-height:1.75}
.pain-card.featured{
  background:linear-gradient(150deg,#ffffff 0%,#eff5ff 100%);
  border:2px solid #bcd2fb;box-shadow:0 20px 46px rgba(29,78,216,.14);
}
.pain-card.featured::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:5px;
  background:linear-gradient(90deg,#1d4ed8,#38bdf8);
}
.pbadge{
  display:inline-block;background:#1d4ed8;color:#fff;font-size:15px;font-weight:600;
  padding:6px 14px;border-radius:999px;margin-left:10px;vertical-align:3px;
}
.p-thumb{margin-top:22px;border-radius:12px;overflow:hidden;border:1px solid #dbe6fb;background:#fff}
.p-thumb img{width:100%;height:150px;object-fit:cover;object-position:top}
.p-thumb span{display:block;font-size:15px;color:var(--muted);padding:12px 16px;background:#fbfdff}

.statement{position:relative;margin:72px 0;padding:96px 0;overflow:hidden}
.statement-bg{position:absolute;inset:0;background:url("../images/pain-points.webp") center/cover no-repeat}
.statement-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,21,48,.94),rgba(14,42,107,.86))}
.statement-inner{position:relative;z-index:1;text-align:center;color:#fff;max-width:1040px;margin:0 auto}
.st-tag{
  display:inline-block;font-size:var(--fs-text);font-weight:600;letter-spacing:.1em;
  border:1px solid rgba(255,255,255,.35);color:#cfe0ff;border-radius:999px;
  padding:9px 20px;margin-bottom:30px;
}
.statement-inner h3{line-height:1.4;margin-bottom:26px}
.statement-inner p{font-size:var(--fs-lead);color:#c9d8f5;max-width:820px;margin:0 auto;line-height:1.75}

.pain-cta{
  margin-top:56px;background:linear-gradient(120deg,#eef4ff,#f7faff);
  border:1px solid #dbe6fb;border-radius:var(--radius);
  padding:42px 46px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.pain-cta p{font-size:var(--fs-lead);font-weight:600;color:var(--brand-deep);max-width:780px;line-height:1.7}

/* ---------- 标准软件 VS 定制软件（无图版，靠结构做强弱） ---------- */
.vs-sec{background:var(--soft)}
.vs-wrap{
  display:grid;grid-template-columns:0.9fr auto 1.18fr;
  gap:28px;align-items:stretch;position:relative;
}
.vs-card{
  background:#fff;border-radius:22px;overflow:visible;position:relative;
  border:1px solid var(--line);transition:.3s;
  display:flex;flex-direction:column;
}
/* 弱化的一侧 */
.vs-card.old{border-color:#e2e8f0;background:#fbfcfe;box-shadow:0 2px 10px rgba(16,42,94,.04)}
.vs-card.old .vs-head{padding:24px 30px;border-bottom:1px solid #eef2f8;background:#f8fafc;border-radius:22px 22px 0 0}
.vs-card.old .vs-label{color:#94a3b8;font-size:22px}
.vs-card.old .vs-list li b{color:#8c97a8;font-weight:600}
.vs-card.old .vs-list li span{color:#a8b4c4}
.vs-card.old .vs-list li::before{background:#eef2f7;color:#a8b4c4}

/* 强调的一侧 */
.vs-card.new{
  transform:translateY(-18px);
  border:2px solid #1d4ed8;
  background:linear-gradient(180deg,#ffffff 0%,#eff5ff 100%);
  box-shadow:0 34px 74px rgba(29,78,216,.20);
  z-index:2;
}
.vs-card.new .vs-head{padding:28px 34px;border-bottom:1px solid #dbe6fb;background:linear-gradient(100deg,#1d4ed8,#3b82f6);border-radius:20px 20px 0 0}
.vs-card.new .vs-label{color:#fff;font-size:32px}
.vs-card.new .vs-list li b{color:var(--ink)}
.vs-card.new .vs-list li span{color:#475569}
.vs-card.new .vs-list li::before{
  background:linear-gradient(135deg,#1d4ed8,#3b82f6);color:#fff;
  box-shadow:0 4px 12px rgba(29,78,216,.28);
}

.vs-head{display:flex;align-items:center;justify-content:space-between;gap:14px}
.vs-label{font-size:22px;font-weight:700}
.vs-flag{font-size:var(--fs-text);font-weight:600;border-radius:999px;padding:7px 16px;white-space:nowrap}
.vs-flag.bad{background:#eef2f7;color:#94a3b8}
.vs-flag.good{background:rgba(255,255,255,.2);color:#fff;border:1px solid rgba(255,255,255,.5)}

.vs-ribbon{
  position:absolute;top:-18px;right:34px;z-index:3;
  background:linear-gradient(100deg,#1d4ed8,#38bdf8);color:#fff;
  font-size:var(--fs-text);font-weight:700;letter-spacing:.04em;
  padding:9px 22px;border-radius:999px;
  box-shadow:0 10px 24px rgba(29,78,216,.35);
}

.vs-list{flex:1;padding:30px 32px 24px}
.vs-card.new .vs-list{padding:32px 34px 26px}
.vs-list li{position:relative;padding-left:46px;margin-bottom:26px}
.vs-list li:last-child{margin-bottom:0}
.vs-list li b{display:block;font-size:18px;font-weight:700;line-height:1.5;margin-bottom:4px;letter-spacing:-.01em}
.vs-list li span{display:block;font-size:16px;line-height:1.7}
.vs-list li::before{
  content:"✕";position:absolute;left:0;top:2px;
  width:30px;height:30px;border-radius:50%;
  display:grid;place-items:center;font-size:16px;font-weight:700;color:#fff;
}
.vs-list.good li::before{content:"✓"}

.vs-result{
  margin:0 32px 32px;padding:20px 24px;border-radius:14px;
  font-size:var(--fs-text);font-weight:600;text-align:center;
}
.vs-result.good{
  background:linear-gradient(100deg,#1d4ed8,#3b82f6);color:#fff;
  box-shadow:0 12px 26px rgba(29,78,216,.24);
}
.vs-result.bad{background:#f1f5f9;color:#94a3b8}
.vs-card.new .vs-result{margin:0 34px 34px}

.vs-badge{align-self:center;z-index:3}
.vs-badge span{
  display:grid;place-items:center;width:68px;height:68px;border-radius:50%;
  background:#fff;border:2px solid #d9e6ff;
  font-weight:800;font-size:20px;color:var(--brand);
  box-shadow:0 14px 30px rgba(16,42,94,.14);
}

.vs-note{text-align:center;margin-top:44px;font-size:var(--fs-lead);color:var(--muted)}
.vs-note b{color:var(--brand);font-size:22px}

/* ---------- 服务 ---------- */
.services-banner{
  border-radius:26px;overflow:hidden;border:1px solid #e8eefb;
  box-shadow:var(--shadow);margin-bottom:56px;background:#fff;
}
.services-banner img{width:100%;height:380px;object-fit:cover}
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.svc-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:38px 34px;transition:.25s;box-shadow:var(--shadow-sm);
}
.svc-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#cddcf8}
.svc-card.accent{background:linear-gradient(160deg,#ffffff,#f2f7ff);border-color:#c8dbfd}
.svc-icon{
  width:56px;height:56px;border-radius:15px;display:grid;place-items:center;
  background:var(--soft-2);color:var(--brand);margin-bottom:22px;
}
.svc-card.accent .svc-icon{background:linear-gradient(135deg,#1d4ed8,#38bdf8);color:#fff}
.svc-icon svg{width:28px;height:28px}
.svc-card h4{margin-bottom:12px}
.svc-card p{font-size:16px;color:var(--muted);margin-bottom:20px;line-height:1.75}
.svc-tags{display:flex;flex-wrap:wrap;gap:10px}
.svc-tags span{font-size:15px;color:var(--ink-2);background:var(--soft);border:1px solid var(--line);border-radius:9px;padding:6px 13px}

/* ---------- AI ---------- */
.ai-sec{background:linear-gradient(180deg,#ffffff,#f6f9ff)}
.ai-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:64px;align-items:center}
.ai-copy h2{margin-bottom:20px}
.ai-visual{border-radius:26px;overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid #e8eefb}
.ai-visual img{width:100%;height:auto}
.ai-list{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:32px 0 38px}
.ai-list li{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 22px;box-shadow:var(--shadow-sm)}
.ai-list strong{display:block;font-size:var(--fs-text);margin-bottom:6px}
.ai-list span{font-size:15px;color:var(--muted);line-height:1.6}

.ai-flow{margin-top:76px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:44px 40px;box-shadow:var(--shadow-sm)}
.ai-flow h4{text-align:center;margin-bottom:34px}
.flow{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.flow li{
  flex:1;min-width:150px;position:relative;text-align:center;
  font-size:var(--fs-text);color:var(--ink-2);
  background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:22px 12px 18px;
}
.flow li::after{
  content:"";position:absolute;right:-11px;top:50%;transform:translateY(-50%);
  width:0;height:0;border-left:9px solid #c3d5f7;border-top:7px solid transparent;border-bottom:7px solid transparent;
}
.flow li:last-child::after{display:none}
.fnum{
  display:grid;place-items:center;width:32px;height:32px;border-radius:50%;
  background:var(--brand);color:#fff;font-size:var(--fs-text);font-weight:700;margin:0 auto 12px;
}

/* ---------- 行业 ---------- */
.industries{padding-bottom:120px}
.ind-banner{position:relative;height:420px;overflow:hidden;margin-bottom:64px}
.ind-banner img{width:100%;height:100%;object-fit:cover}
.ind-banner-overlay{
  position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;color:#fff;padding:0 40px;
  background:linear-gradient(180deg,rgba(8,21,48,.62),rgba(8,21,48,.8));
}
.ind-banner-overlay h2{margin-top:6px}
.ind-banner-overlay h2 span{color:#8ab4ff}
.ind-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.ind-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:.25s;display:block;
}
.ind-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#cddcf8}
.ind-card img{width:100%;height:230px;object-fit:cover}
.ind-body{padding:26px 28px 30px}
.ind-body h4{margin-bottom:8px}
.ind-body p{font-size:16px;color:var(--muted)}
.ind-note{text-align:center;margin-top:48px;font-size:var(--fs-lead);color:var(--ink-2)}
.ind-note b{color:var(--brand)}

/* ---------- 案例 ---------- */
.cases{background:var(--soft)}
.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.case-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:.25s;
}
.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.case-img{position:relative;height:260px;overflow:hidden}
.case-img img{width:100%;height:100%;object-fit:cover}
.case-tag{
  position:absolute;left:22px;top:20px;background:rgba(10,24,54,.86);color:#fff;
  font-size:var(--fs-text);font-weight:600;padding:7px 16px;border-radius:999px;backdrop-filter:blur(4px);
}
.case-body{padding:34px 34px 36px}
.case-body h4{margin-bottom:22px}
.case-body dl{display:grid;gap:16px}
.case-body dl>div{display:grid;grid-template-columns:60px 1fr;gap:18px;align-items:start}
.case-body dt{
  font-size:var(--fs-text);font-weight:700;color:var(--brand);background:var(--soft-2);
  border-radius:8px;text-align:center;padding:3px 0;
}
.case-body dd{font-size:16px;color:var(--ink-2);line-height:1.7}

/* ---------- 流程 ---------- */
.process-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;position:relative}
.process-grid li{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 22px;
  box-shadow:var(--shadow-sm);text-align:center;position:relative;
}
.process-grid li::after{
  content:"";position:absolute;right:-13px;top:52px;width:14px;height:14px;
  border-top:2px solid #cfddf9;border-right:2px solid #cfddf9;transform:rotate(45deg);
}
.process-grid li:last-child::after{display:none}
.step{
  display:grid;place-items:center;width:54px;height:54px;margin:0 auto 18px;border-radius:50%;
  background:linear-gradient(135deg,#1d4ed8,#38bdf8);color:#fff;font-size:var(--fs-text);font-weight:700;
  box-shadow:0 8px 18px rgba(29,78,216,.22);
}
.process-grid h4{margin-bottom:10px}
.process-grid p{font-size:16px;color:var(--muted);line-height:1.65}

/* ---------- 为什么选择我们 ---------- */
.why-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:64px;align-items:center}
.why-visual{border-radius:26px;overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid #e8eefb}
.why-visual img{width:100%;height:auto}
.why-copy h2{margin-bottom:22px}
.why-list{margin-top:32px;display:grid;gap:18px}
.why-list li{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 24px;box-shadow:var(--shadow-sm)}
.why-list strong{display:block;font-size:var(--fs-text);margin-bottom:4px}
.why-list span{font-size:16px;color:var(--muted);line-height:1.65}

/* ---------- FAQ ---------- */
.faq{background:var(--soft)}
.faq-list{max-width:1020px;margin:0 auto;display:grid;gap:16px}
.faq details{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  box-shadow:var(--shadow-sm);overflow:hidden;transition:.25s;
}
.faq details[open]{border-color:#c8dbfd;box-shadow:var(--shadow)}
.faq summary{
  list-style:none;cursor:pointer;padding:26px 76px 26px 30px;position:relative;
  font-size:var(--fs-body);font-weight:600;color:var(--ink);line-height:1.5;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary i{position:absolute;right:30px;top:50%;margin-top:-9px;width:18px;height:18px}
.faq summary i::before,.faq summary i::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:.25s}
.faq summary i::before{left:0;top:8px;width:18px;height:2.5px}
.faq summary i::after{left:8px;top:0;width:2.5px;height:18px}
.faq details[open] summary i::after{transform:rotate(90deg);opacity:0}
.faq-body{padding:0 30px 28px;font-size:16px;color:var(--muted);line-height:1.8}
.faq-tags{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 20px}
.faq-tags span{font-size:15px;color:var(--ink-2);background:var(--soft);border:1px solid var(--line);border-radius:9px;padding:6px 13px}
.faq-cta{font-weight:600;color:var(--brand-deep);margin-bottom:18px;font-size:16px}

/* ---------- 最终 CTA ---------- */
.final-cta{position:relative;overflow:hidden;padding:130px 0}
.cta-bg{position:absolute;inset:0;background:url("../images/cta-banner.webp") center/cover no-repeat}
.cta-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(7,18,42,.88),rgba(15,50,116,.74))}
.cta-inner{position:relative;z-index:1;text-align:center;color:#fff}
.cta-inner h2{margin-bottom:24px}
.cta-inner p{font-size:var(--fs-lead);color:#c9d8f5;margin-bottom:40px}
.cta-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:34px}
.cta-tags li{font-size:var(--fs-text);color:#dbe7fb;border:1px solid rgba(255,255,255,.24);border-radius:999px;padding:8px 20px}

/* ---------- Footer ---------- */
.site-footer{background:#08122c;color:#c3d0e8;padding:82px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:48px;padding-bottom:52px}
.f-brand .logo{color:#fff;margin-bottom:20px}
.f-brand .logo-text em{display:none}
.f-slogan{font-size:var(--fs-text);font-weight:600;color:#fff;margin-bottom:12px}
.f-desc{font-size:16px;max-width:400px;color:#93a4c4;line-height:1.75}
.f-col h5{color:#fff;margin-bottom:20px}
.f-col a{display:block;font-size:16px;color:#93a4c4;margin-bottom:13px;transition:.2s}
.f-col a:hover{color:#8ab4ff}
.f-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.1);padding-top:26px;font-size:16px;color:#7d8fb0;
}
.f-links{display:flex;gap:26px}
.f-links a:hover{color:#8ab4ff}

/* ---------- 动画 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .float-card{animation:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1500px){
  :root{--gutter:32px}
}

@media (max-width:1280px){
  :root{
    --fs-h1:56px;--fs-h2:48px;--fs-h3:40px;--fs-h4:24px;
    --fs-lead:19px;--fs-nav:16px;
  }
  .vs-card.new{transform:translateY(-24px)}
  .vs-card.new .vs-label{font-size:26px}
}

@media (max-width:1180px){
  .nav-links{
    display:none;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:12px 32px 24px;
    box-shadow:0 16px 34px rgba(16,42,94,.1);max-height:calc(100vh - 88px);overflow-y:auto;
  }
  .nav-links.open{display:flex}
  .nav-links>a{padding:16px 4px;border-bottom:1px solid #f1f5fb;font-size:17px}
  .nav-cta{margin:18px 0 0;justify-content:center;height:54px}
  .hamburger{display:flex}
  .process-grid{grid-template-columns:repeat(3,1fr)}
  .process-grid li::after{display:none}
}

@media (max-width:980px){
  :root{
    --fs-h1:44px;--fs-h2:38px;--fs-h3:32px;--fs-h4:22px;--fs-h5:19px;
    --fs-lead:18px;--fs-body:17px;
  }
  .section{padding:80px 0}
  .pc{display:none}
  .hero{padding:60px 0 72px}
  .hero-grid,.ai-grid,.why-grid{grid-template-columns:1fr;gap:48px}
  .hero-visual{order:-1}
  .fc-1,.fc-2{left:8px}
  .fc-3{right:8px}
  .trust-strip{grid-template-columns:repeat(2,1fr);margin-top:48px}
  .trust-strip li:nth-child(2){border-right:0}
  .trust-strip li:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .pain-grid,.svc-grid,.ind-grid{grid-template-columns:repeat(2,1fr)}
  .vs-wrap{grid-template-columns:1fr;gap:32px}
  .vs-card.new{transform:none}
  .vs-badge{display:none}
  .case-grid{grid-template-columns:1fr}
  .industries{padding-bottom:80px}
  .ind-banner{height:340px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .flow li::after{display:none}
  .flow li{min-width:46%}
}

@media (max-width:680px){
  :root{
    --fs-h1:34px;--fs-h2:29px;--fs-h3:26px;--fs-h4:21px;
    --fs-lead:17px;--fs-body:16px;--gutter:18px;
  }
  .section{padding:64px 0}
  .sec-head{margin-bottom:44px}
  .trust-strip{grid-template-columns:1fr}
  .trust-strip li{border-right:0;border-bottom:1px solid var(--line)}
  .trust-strip li:last-child{border-bottom:0}
  .pain-grid,.svc-grid,.ind-grid,.process-grid{grid-template-columns:1fr}
  .ai-list{grid-template-columns:1fr}
  .flow li{min-width:100%;flex:none}
  .statement{padding:56px 0;margin:48px 0}
  .pain-cta{padding:30px 24px}
  .pain-cta .btn,.hero-actions .btn{width:100%}
  .services-banner img{height:220px}
  .ind-banner{height:300px}
  .vs-list{padding:24px 22px 18px}
  .vs-card.new .vs-list{padding:26px 24px 20px}
  .vs-list li{padding-left:40px;margin-bottom:22px}
  .vs-result{margin:0 22px 24px}
  .vs-card.new .vs-result{margin:0 24px 24px}
  .vs-card.new .vs-label{font-size:26px}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .faq summary{padding:22px 60px 22px 22px}
  .faq-body{padding:0 22px 24px}
  .final-cta{padding:80px 0}
}