/* ============================================================
   中系科技 SysCenter Technologies — 企业官网共享样式
   ============================================================ */
:root{
  --bg:#FFFFFF;
  --bg-soft:#F4F6F9;
  --card:#FFFFFF;
  --ink:#15191F;
  --ink-2:#4A5260;
  --ink-3:#8B93A1;
  --line:#E4E8EF;
  --line-strong:#C9D1DD;
  --brand:#122F5C;          /* Logo 海军蓝 */
  --brand-2:#1B3F78;
  --accent:#1A5FD6;          /* 行动蓝 */
  --accent-soft:rgba(26,95,214,.08);
  --brand-soft:rgba(14,42,82,.05);
  --grid-line:rgba(14,42,82,.055);
  --shadow:0 12px 36px rgba(14,42,82,.10);
  --header-bg:rgba(255,255,255,.88);
  --menu-bg:rgba(255,255,255,.98);
  --radius:10px;
  --maxw:1200px;
  --ok:#0E8345;
}
html[data-theme="dark"]{
  --bg:#0A0F1A;
  --bg-soft:#0E1523;
  --card:#121A2B;
  --ink:#EDF1F8;
  --ink-2:rgba(230,238,250,.68);
  --ink-3:rgba(230,238,250,.42);
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.24);
  --brand:#DCE6F5;
  --brand-2:#B9CCEC;
  --accent:#5B95F5;
  --accent-soft:rgba(91,149,245,.13);
  --brand-soft:rgba(220,230,245,.06);
  --grid-line:rgba(220,230,245,.05);
  --shadow:0 14px 40px rgba(0,0,0,.5);
  --header-bg:rgba(10,15,26,.85);
  --menu-bg:rgba(10,15,26,.98);
}
*{margin:0;padding:0;box-sizing:border-box}
html{overflow-x:hidden}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.78;
  -webkit-font-smoothing:antialiased;
  transition:background-color .35s,color .35s;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:rgba(26,95,214,.2)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* ===== 滚动渐现 ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.07s}.reveal.d2{transition-delay:.14s}
.reveal.d3{transition-delay:.21s}.reveal.d4{transition-delay:.28s}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ===== 品牌标 ===== */
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--brand)}
.brand .mark{width:36px;height:36px;flex-shrink:0;object-fit:contain}
.brand img.mark{filter:brightness(0) invert(1)}
.brand .word{line-height:1.15}
.brand .word b{font-size:16.5px;font-weight:700;letter-spacing:.4px;color:#fff;display:block;white-space:nowrap}
.brand .word i{font-style:normal;color:var(--ink-3);font-weight:500;font-size:10px;letter-spacing:1.6px;display:block;margin-top:1px}

/* ===== 导航 ===== */
header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(13,32,61,.88);backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background-color .35s;
}
header.scrolled{background:rgba(10,25,48,.96)}
html[data-theme="dark"] header{background:rgba(13,21,37,.9)}
html[data-theme="dark"] header.scrolled{background:rgba(9,14,25,.96)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.nav .links{display:flex;gap:26px;list-style:none}
.nav .links a{font-size:14px;color:rgba(255,255,255,.72);letter-spacing:.3px;transition:color .2s;position:relative;white-space:nowrap;padding:4px 0}
.nav .links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:-4px;height:2px;
  background:#5B95F5;transition:right .25s;
}
.nav .links a:hover{color:#fff}
.nav .links a:hover::after{right:0}
.nav .links a.active{color:#fff;font-weight:600}
.nav .links a.active::after{right:0}
.nav .right{display:flex;align-items:center;gap:12px}
.nav .cta{
  font-size:13.5px;font-weight:600;letter-spacing:.3px;padding:9px 20px;border-radius:6px;
  background:var(--accent);color:#fff;transition:.25s;white-space:nowrap;
}
.nav .cta:hover{filter:brightness(1.12)}

/* 主题切换 */
.theme-toggle{
  width:38px;height:38px;border-radius:8px;border:1px solid rgba(255,255,255,.28);
  background:transparent;color:rgba(255,255,255,.85);cursor:pointer;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  transition:border-color .25s,color .25s;
}
.theme-toggle:hover{border-color:rgba(255,255,255,.55);color:#fff}
.theme-toggle .icon-sun{display:none}
html[data-theme="dark"] .theme-toggle .icon-sun{display:block}
html[data-theme="dark"] .theme-toggle .icon-moon{display:none}

/* 汉堡按钮 */
.burger{
  display:none;width:40px;height:40px;border:none;background:none;cursor:pointer;
  flex-direction:column;justify-content:center;align-items:center;gap:6px;flex-shrink:0;
}
.burger span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:.35s cubic-bezier(.16,1,.3,1)}
body.menu-open .burger span:nth-child(1){transform:translateY(8px) rotate(45deg)}
body.menu-open .burger span:nth-child(2){opacity:0;transform:scaleX(0)}
body.menu-open .burger span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
body.menu-open header{z-index:130;background:#0B1B34;backdrop-filter:none;border-color:transparent}
html[data-theme="dark"] body.menu-open header{background:#0D1525}

/* 移动端全屏菜单 */
.mobile-menu{
  position:fixed;inset:0;z-index:120;background:var(--menu-bg);backdrop-filter:blur(24px);
  display:flex;flex-direction:column;padding:86px 34px 34px;overflow-y:auto;
  opacity:0;visibility:hidden;transition:opacity .35s,visibility .35s;
}
body.menu-open .mobile-menu{opacity:1;visibility:visible}
.mobile-menu a.mlink{
  font-size:21px;font-weight:700;padding:13px 0;color:var(--ink);
  display:flex;align-items:baseline;gap:14px;border-bottom:1px solid var(--line);
  opacity:0;transform:translateY(20px);transition:opacity .45s,transform .45s;
}
.mobile-menu a.mlink:first-child{margin-top:auto}
body.menu-open .mobile-menu a.mlink{opacity:1;transform:none}
body.menu-open .mobile-menu a.mlink:nth-child(2){transition-delay:.04s}
body.menu-open .mobile-menu a.mlink:nth-child(3){transition-delay:.08s}
body.menu-open .mobile-menu a.mlink:nth-child(4){transition-delay:.12s}
body.menu-open .mobile-menu a.mlink:nth-child(5){transition-delay:.16s}
body.menu-open .mobile-menu a.mlink:nth-child(6){transition-delay:.20s}
body.menu-open .mobile-menu a.mlink:nth-child(7){transition-delay:.24s}
body.menu-open .mobile-menu a.mlink:nth-child(8){transition-delay:.28s}
body.menu-open .mobile-menu a.mlink:nth-child(9){transition-delay:.32s}
.mobile-menu a.mlink small{font-size:11px;letter-spacing:2.5px;color:var(--ink-3);font-weight:400;text-transform:uppercase}
.mobile-menu .m-contact{margin-top:30px;margin-bottom:auto;display:flex;flex-direction:column;gap:8px;opacity:0;transform:translateY(20px);transition:opacity .45s .34s,transform .45s .34s}
body.menu-open .mobile-menu .m-contact{opacity:1;transform:none}
.mobile-menu .m-contact a{color:var(--ink-2);font-size:14.5px}
.mobile-menu .m-contact a b{color:var(--ink)}
@media (max-height:760px){
  .mobile-menu{padding-top:80px}
  .mobile-menu a.mlink{font-size:17px;padding:10px 0;gap:11px}
  .mobile-menu a.mlink small{font-size:10px;letter-spacing:2px}
  .mobile-menu .m-contact{margin-top:20px;gap:6px}
  .mobile-menu .m-contact a{font-size:13.5px}
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 30px;border-radius:6px;font-size:15.5px;font-weight:600;letter-spacing:.3px;
  transition:transform .22s,box-shadow .22s,background-color .22s,color .22s,border-color .22s;cursor:pointer;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(26,95,214,.3);filter:brightness(1.08)}
.btn-line{border:1.5px solid var(--brand);color:var(--brand)}
html[data-theme="dark"] .btn-line{border-color:var(--line-strong);color:var(--ink)}
.btn-line:hover{transform:translateY(-2px);background:var(--brand);color:#fff;border-color:var(--brand)}
html[data-theme="dark"] .btn-line:hover{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.arrow-link{
  display:inline-flex;align-items:center;gap:7px;color:var(--accent);font-size:14px;font-weight:600;
  transition:gap .25s;
}
.arrow-link:hover{gap:11px}

/* ===== 首页 Hero ===== */
.hero{
  position:relative;padding:178px 0 110px;overflow:hidden;
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    radial-gradient(820px 460px at 86% -10%, var(--accent-soft), transparent 65%),
    var(--bg);
  background-size:54px 54px,54px 54px,auto,auto;
}
.hero .hexa{
  position:absolute;right:-110px;top:50%;transform:translateY(-50%);
  width:560px;height:560px;opacity:.06;pointer-events:none;object-fit:contain;
}
html[data-theme="dark"] .hero img.hexa{filter:brightness(0) invert(1);opacity:.05}
.hero .kicker-line{
  display:inline-flex;align-items:center;gap:10px;font-size:12.5px;letter-spacing:3px;
  color:var(--accent);font-weight:700;text-transform:uppercase;margin-bottom:24px;
}
.hero .kicker-line::before{content:"";width:34px;height:2px;background:var(--accent)}
.hero h1{font-size:clamp(34px,4.6vw,58px);line-height:1.28;font-weight:800;letter-spacing:1px;color:var(--ink);max-width:840px}
.hero p.sub{font-size:clamp(15.5px,1.5vw,18px);color:var(--ink-2);max-width:680px;margin:26px 0 42px}
.hero .btns{display:flex;gap:16px;flex-wrap:wrap}
.hero .trustline{
  display:flex;gap:clamp(26px,4vw,60px);flex-wrap:wrap;margin-top:clamp(48px,7vh,84px);
  padding-top:30px;border-top:1px solid var(--line);
}
.hero .trustline div{font-size:13.5px;color:var(--ink-3)}
.hero .trustline b{display:block;font-size:16.5px;color:var(--ink);font-weight:700;margin-bottom:2px}

/* ===== 子页面 Hero ===== */
.page-hero{
  padding:152px 0 64px;
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    var(--bg-soft);
  background-size:54px 54px,54px 54px,auto;
  border-bottom:1px solid var(--line);
  transition:background-color .35s;
}
.page-hero .crumb{font-size:13px;color:var(--ink-3);margin-bottom:14px}
.page-hero .crumb a:hover{color:var(--accent)}
.page-hero h1{font-size:clamp(28px,3.6vw,44px);font-weight:800;letter-spacing:.5px;line-height:1.3}
.page-hero p{color:var(--ink-2);font-size:16px;max-width:760px;margin-top:14px}

/* ===== 图片容器 ===== */
.media{
  border-radius:var(--radius);border:1px solid var(--line);overflow:hidden;
  background:var(--bg-soft);margin:0;
}
.media img{width:100%;height:100%;object-fit:cover;display:block}
.media.r32{aspect-ratio:3/2}
.media.r43{aspect-ratio:4/3}
.media.r219{aspect-ratio:21/9}
html[data-theme="dark"] .media img{filter:brightness(.88)}
.hero .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero .hero-grid h1{font-size:clamp(32px,3.4vw,46px)}
.sol-block .side .media{margin-top:22px}
.banner-media{margin-top:clamp(36px,5vh,56px)}
@media (max-width:1020px){
  .hero .hero-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .hero .hero-grid .media{display:none}
}

/* ===== Section 通用 ===== */
section{padding:clamp(64px,9vh,104px) 0}
section.alt{background:var(--bg-soft);transition:background-color .35s}
.sec-head{max-width:760px;margin-bottom:clamp(36px,5vh,56px)}
.sec-head .kicker{font-size:12px;font-weight:700;letter-spacing:4px;text-transform:uppercase;color:var(--accent)}
.sec-head h2{font-size:clamp(25px,3vw,38px);font-weight:800;line-height:1.34;margin:10px 0 12px;letter-spacing:.5px}
.sec-head p{color:var(--ink-2);font-size:15.5px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ===== 卡片 ===== */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  transition:transform .28s,border-color .28s,box-shadow .28s,background-color .35s;
  position:relative;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;border-radius:var(--radius) var(--radius) 0 0;
  background:var(--accent);opacity:0;transition:opacity .28s;
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.card:hover::before{opacity:1}
.card.flat::before{display:none}
.card.flat:hover{transform:none;box-shadow:none;border-color:var(--line)}

/* 能力 / 通用卡片网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cap{padding:32px 28px;display:flex;flex-direction:column}
.cap .icon{
  width:48px;height:48px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;background:var(--accent-soft);color:var(--accent);
}
.cap h3{font-size:17.5px;margin-bottom:8px;font-weight:700}
.cap p{color:var(--ink-2);font-size:14px;flex:1}
.cap .arrow-link{margin-top:16px}

/* 价值主张 */
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.value{background:var(--card);padding:30px 28px;transition:background-color .35s}
.value h3{font-size:16.5px;font-weight:700;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.value h3::before{content:"";width:8px;height:8px;background:var(--accent);flex-shrink:0;transform:rotate(45deg)}
.value p{font-size:13.5px;color:var(--ink-2)}

/* ===== 解决方案详情区块 ===== */
.sol-block{display:grid;grid-template-columns:340px 1fr;gap:56px;align-items:start}
.sol-block .side{position:sticky;top:104px}
.sol-block .side .num{font-size:13px;font-weight:700;letter-spacing:2px;color:var(--accent);font-family:ui-monospace,Menlo,monospace}
.sol-block .side h2{font-size:clamp(22px,2.4vw,30px);font-weight:800;line-height:1.36;margin:8px 0 12px}
.sol-block .side p{color:var(--ink-2);font-size:14.5px}
.checklist{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:12px 24px}
.checklist li{
  padding:13px 16px 13px 42px;font-size:14.5px;color:var(--ink);
  background:var(--card) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="%231A5FD6" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"/></svg>') no-repeat 16px center;
  border:1px solid var(--line);border-radius:8px;transition:background-color .35s,border-color .25s;
}
.checklist li:hover{border-color:var(--line-strong)}
.focus-quote{
  margin-top:24px;padding:22px 26px;border-left:3px solid var(--accent);
  background:var(--accent-soft);border-radius:0 8px 8px 0;
  font-size:15px;color:var(--ink);line-height:1.8;
}

/* ===== 行业卡片 ===== */
.industry{padding:34px 30px}
.industry .tagrow{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.industry h3{font-size:19px;font-weight:700;margin-bottom:8px}
.industry p{font-size:14px;color:var(--ink-2)}
.tag{
  font-size:12.5px;padding:5px 12px;border-radius:999px;border:1px solid var(--line);
  color:var(--ink-2);background:var(--bg-soft);transition:background-color .35s;
}

/* ===== 服务矩阵 ===== */
.matrix{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.matrix .col{padding:26px 22px}
.matrix .col h3{font-size:16px;font-weight:700;margin-bottom:14px;padding-bottom:12px;border-bottom:2px solid var(--accent)}
.matrix .col ul{list-style:none}
.matrix .col li{font-size:13.5px;color:var(--ink-2);padding:7px 0;border-bottom:1px dashed var(--line)}
.matrix .col li:last-child{border-bottom:none}

/* ===== 服务流程 ===== */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.flow .step{padding:24px 22px}
.flow .step .n{
  font-size:13px;font-weight:700;color:var(--accent);font-family:ui-monospace,Menlo,monospace;
  display:inline-block;padding:3px 10px;border:1px solid var(--accent);border-radius:6px;margin-bottom:12px;
}
.flow .step h3{font-size:16px;font-weight:700;margin-bottom:5px}
.flow .step p{font-size:13px;color:var(--ink-2)}

/* ===== 技术能力标签 ===== */
.tech-layer{padding:30px 28px;margin-bottom:18px}
.tech-layer h3{font-size:17.5px;font-weight:700;margin-bottom:6px}
.tech-layer p{font-size:13.5px;color:var(--ink-2);margin-bottom:16px}
.tech-tags{display:flex;gap:10px;flex-wrap:wrap}
.tech-tags span{
  font-size:13.5px;padding:8px 16px;border-radius:8px;border:1px solid var(--line);
  background:var(--bg-soft);color:var(--ink);font-weight:500;transition:border-color .25s,background-color .35s;
}
.tech-tags span:hover{border-color:var(--accent)}

/* ===== 案例 ===== */
.case{padding:38px 34px;margin-bottom:24px}
.case .case-head{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:8px}
.case h3{font-size:20px;font-weight:800;line-height:1.45}
.case .case-tags{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-start}
.case .body{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 34px;margin-top:18px}
.case .seg h4{
  font-size:13px;font-weight:700;letter-spacing:2px;color:var(--accent);
  text-transform:uppercase;margin-bottom:6px;
}
.case .seg{padding:14px 0;border-top:1px solid var(--line)}
.case .seg p,.case .seg li{font-size:14px;color:var(--ink-2)}
.case .seg ul{list-style:none}
.case .seg li{padding:2px 0 2px 16px;position:relative}
.case .seg li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;background:var(--accent);transform:rotate(45deg)}

/* ===== 洞察 ===== */
.insight-group{margin-bottom:46px}
.insight-group h3{font-size:19px;font-weight:800;margin-bottom:18px;display:flex;align-items:center;gap:12px}
.insight-group h3::before{content:"";width:5px;height:20px;background:var(--accent);border-radius:2px}
.post{padding:26px 26px}
.post .cat{font-size:12px;font-weight:700;letter-spacing:2px;color:var(--accent);text-transform:uppercase}
.post h4{font-size:16.5px;font-weight:700;line-height:1.5;margin:8px 0}
.post p{font-size:13.5px;color:var(--ink-2)}

/* ===== 关于 ===== */
.principles{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.principle{padding:26px 22px;text-align:center}
.principle h3{font-size:15.5px;font-weight:700;margin-bottom:6px}
.principle p{font-size:12.5px;color:var(--ink-2)}

/* ===== CTA 横幅 ===== */
.cta-band{
  background:linear-gradient(120deg,#0E2A52 0%,#143A6E 55%,#1A5FD6 130%);
  border-radius:18px;padding:clamp(40px,5vw,64px);color:#fff;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:48px 48px;
}
.cta-band .inner{position:relative;display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(22px,2.8vw,34px);font-weight:800;line-height:1.4}
.cta-band p{color:rgba(255,255,255,.75);font-size:15px;margin-top:8px;max-width:560px}
.cta-band .btn-primary{background:#fff;color:#0E2A52}
.cta-band .btn-primary:hover{box-shadow:0 10px 26px rgba(0,0,0,.3)}

/* ===== 联系页 ===== */
.contact-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:36px;align-items:start}
.form-card{padding:38px 36px}
.form-card .frow{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
.form-card .frow.full{grid-template-columns:1fr}
.form-card label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px;color:var(--ink)}
.form-card label em{color:var(--accent);font-style:normal}
.form-card input,.form-card select,.form-card textarea{
  width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:8px;
  font-size:14.5px;font-family:inherit;color:var(--ink);background:var(--bg);
  transition:border-color .2s,background-color .35s;
}
.form-card input:focus,.form-card select:focus,.form-card textarea:focus{outline:none;border-color:var(--accent)}
.form-card textarea{resize:vertical;min-height:110px}
.form-note{font-size:12.5px;color:var(--ink-3);margin-top:14px}
.info-card{padding:32px 30px}
.info-card h3{font-size:17px;font-weight:700;margin-bottom:16px}
.info-item{display:flex;gap:14px;padding:13px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.info-item:last-child{border-bottom:none}
.info-item .ic{
  width:38px;height:38px;border-radius:9px;background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.info-item small{display:block;font-size:12px;color:var(--ink-3)}
.info-item b{font-size:15px}

/* ===== 页脚 ===== */
footer{background:#0E2342;transition:background-color .35s}
html[data-theme="dark"] footer{background:#0D1424}
.foot-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr .9fr;gap:40px;
  padding:56px 28px 40px;max-width:var(--maxw);margin:0 auto;
}
.foot-grid .f-brand p{font-size:13.5px;color:rgba(255,255,255,.58);margin:14px 0 16px;max-width:300px}
.foot-grid h4{font-size:14px;font-weight:700;margin-bottom:14px;color:#fff}
.foot-grid ul{list-style:none}
.foot-grid li{margin-bottom:9px}
.foot-grid li a{font-size:13.5px;color:rgba(255,255,255,.62);transition:color .2s}
.foot-grid li a:hover{color:#fff}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12)}
.foot-bottom .wrap{
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  padding-top:20px;padding-bottom:20px;font-size:12.5px;color:rgba(255,255,255,.45);
}

/* ===== 响应式 ===== */
@media (max-width:1060px){
  .nav .links{display:none}
  .burger{display:flex}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .values{grid-template-columns:repeat(2,1fr)}
  .matrix{grid-template-columns:repeat(3,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .principles{grid-template-columns:repeat(3,1fr)}
  .sol-block{grid-template-columns:1fr;gap:26px}
  .sol-block .side{position:static}
  .contact-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .wrap{padding:0 22px}
  .nav .cta{display:none}
  .hero{padding:138px 0 70px}
  .page-hero{padding:128px 0 48px}
  .grid-2,.grid-3,.grid-4,.values,.flow{grid-template-columns:1fr}
  .matrix{grid-template-columns:1fr 1fr}
  .checklist{grid-template-columns:1fr}
  .case .body{grid-template-columns:1fr}
  .principles{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr;gap:28px;padding-top:40px}
  .hero .hexa{display:none}
}