/* ============ 设计变量 ============ */
:root{
  --ink:#0A1F33;
  --ink-2:#0E2A45;
  --primary:#14568C;
  --primary-light:#E8F1F8;
  --accent:#12A594;
  --accent-light:#E3F6F3;
  --gold:#D9A441;
  --bg:#F6F9FC;
  --card:#FFFFFF;
  --text:#243B53;
  --muted:#627D98;
  --line:#E1E9F0;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 2px 8px rgba(10,31,51,.06), 0 12px 32px rgba(10,31,51,.08);
  --shadow-hover:0 4px 12px rgba(10,31,51,.08), 0 20px 48px rgba(10,31,51,.14);
  --font:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:var(--font);color:var(--text);background:var(--card);line-height:1.7;-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
.container{max-width:1200px;margin:0 auto;padding:0 28px;}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--ink);color:rgba(255,255,255,.72);font-size:13px;padding:9px 0;}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;}
.topbar a{color:rgba(255,255,255,.72);transition:color .2s;}
.topbar a:hover{color:#fff;}
.topbar-left{display:flex;gap:22px;flex-wrap:wrap;align-items:center;}
.topbar-left .dot{width:4px;height:4px;border-radius:50%;background:var(--accent);display:inline-block;margin-right:8px;vertical-align:middle;}

/* ============ 头部导航 ============ */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color .25s, box-shadow .25s;}
.header.scrolled{border-bottom-color:var(--line);box-shadow:0 4px 24px rgba(10,31,51,.06);}
.header .container{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px;}
.logo{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.logo-mark{width:42px;height:42px;flex-shrink:0;}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-text .cn{font-size:18px;font-weight:750;color:var(--ink);letter-spacing:2px;}
.logo-text .en{font-size:9.5px;font-weight:650;color:var(--muted);letter-spacing:1.8px;text-transform:uppercase;}
.nav{display:flex;align-items:center;gap:6px;}
.nav a{padding:9px 15px;font-size:15px;font-weight:500;color:var(--text);border-radius:8px;transition:color .2s, background .2s;}
.nav a:hover{color:var(--primary);background:var(--primary-light);}
.nav-drop{position:relative;}
.nav-drop-menu{position:absolute;top:100%;left:0;min-width:172px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:8px;opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity .2s, transform .2s, visibility .2s;}
.nav-drop:hover .nav-drop-menu,.nav-drop:focus-within .nav-drop-menu{opacity:1;visibility:visible;transform:translateY(0);}
.nav-drop-menu a{display:block;padding:9px 14px;font-size:14px;}
.header-cta{display:flex;align-items:center;gap:12px;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font);font-size:15px;font-weight:600;border-radius:10px;padding:12px 26px;cursor:pointer;border:none;transition:transform .2s, box-shadow .2s, background .2s, color .2s;white-space:nowrap;}
.btn-primary{background:linear-gradient(135deg, var(--primary) 0%, #1B6BA8 100%);color:#fff;box-shadow:0 4px 14px rgba(20,86,140,.28);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(20,86,140,.36);}
.btn-accent{background:linear-gradient(135deg, var(--accent) 0%, #0FB9A5 100%);color:#fff;box-shadow:0 4px 14px rgba(18,165,148,.3);}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(18,165,148,.4);}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1.5px solid rgba(255,255,255,.35);}
.btn-ghost:hover{background:rgba(255,255,255,.2);transform:translateY(-2px);}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary);}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px);}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;}
.menu-toggle span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.25s;}

/* ============ Hero ============ */
.hero{position:relative;background:linear-gradient(155deg, var(--ink) 0%, var(--ink-2) 45%, #0F3D5C 100%);color:#fff;overflow:hidden;}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(ellipse 700px 500px at 82% 20%, rgba(18,165,148,.22), transparent 65%),
  radial-gradient(ellipse 600px 400px at 12% 85%, rgba(20,86,140,.3), transparent 65%);}
.hero-grid{position:absolute;inset:0;opacity:.5;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:56px 56px;}
.hero .container{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;padding-top:88px;padding-bottom:88px;}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:650;letter-spacing:3px;text-transform:uppercase;color:#5FE3D0;margin-bottom:22px;}
.hero-eyebrow::before{content:"";width:34px;height:2px;background:#5FE3D0;border-radius:2px;}
.hero h1{font-size:clamp(34px, 4.6vw, 54px);font-weight:800;line-height:1.22;letter-spacing:1px;margin-bottom:22px;}
.hero h1 .hl{background:linear-gradient(120deg, #4FD1C5 0%, #7DD3C0 60%, #A7E8DC 100%);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{font-size:17px;line-height:1.95;color:rgba(255,255,255,.78);max-width:540px;margin-bottom:36px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:42px;}
.hero-points{display:flex;gap:28px;flex-wrap:wrap;}
.hero-point{display:flex;align-items:center;gap:10px;font-size:14.5px;color:rgba(255,255,255,.82);}
.hero-point .ic{width:26px;height:26px;border-radius:8px;background:rgba(18,165,148,.22);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.hero-visual{position:relative;height:440px;}
.molecule-wrap{position:absolute;inset:0;}
.hero-badge{position:absolute;background:rgba(255,255,255,.08);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.14);border-radius:12px;padding:14px 18px;}
.hero-badge .t{font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:rgba(255,255,255,.55);margin-bottom:4px;}
.hero-badge .v{font-size:15px;font-weight:700;color:#fff;}
.hero-badge.b1{top:22px;right:8px;}
.hero-badge.b2{bottom:38px;left:0;}
.hero-badge.b3{bottom:150px;right:-6px;}

/* ============ 服务对象条 ============ */
.serve{background:var(--card);border-bottom:1px solid var(--line);}
.serve .container{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;padding:26px 28px;}
.serve-label{font-size:13px;font-weight:700;letter-spacing:2.5px;color:var(--muted);text-transform:uppercase;margin-right:8px;}
.serve-chip{display:inline-flex;align-items:center;gap:8px;padding:9px 18px;background:var(--bg);border:1px solid var(--line);border-radius:999px;font-size:14px;font-weight:600;color:var(--ink-2);}
.serve-chip .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);}

/* ============ 通用 Section ============ */
.section{padding:96px 0;}
.section-alt{background:var(--bg);}
.sec-head{max-width:680px;margin-bottom:56px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;font-weight:700;letter-spacing:3px;text-transform:uppercase;color:var(--accent);margin-bottom:16px;}
.sec-eyebrow::before{content:"";width:28px;height:2px;background:var(--accent);border-radius:2px;}
.sec-head.center .sec-eyebrow::before{display:none;}
.sec-head h2{font-size:clamp(26px, 3.2vw, 38px);font-weight:800;color:var(--ink);line-height:1.35;letter-spacing:.5px;margin-bottom:16px;}
.sec-head p{font-size:16px;color:var(--muted);line-height:1.9;}

/* ============ 三大产品线 ============ */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.biz-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:38px 32px;transition:transform .28s, box-shadow .28s, border-color .28s;overflow:hidden;}
.biz-card::after{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg, var(--primary), var(--accent));opacity:0;transition:opacity .28s;}
.biz-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent;}
.biz-card:hover::after{opacity:1;}
.biz-icon{width:56px;height:56px;border-radius:14px;background:var(--primary-light);display:flex;align-items:center;justify-content:center;margin-bottom:22px;}
.biz-card:nth-child(2) .biz-icon{background:var(--accent-light);}
.biz-card:nth-child(3) .biz-icon{background:#FBF3E0;}
.biz-card h3{font-size:21px;font-weight:750;color:var(--ink);margin-bottom:12px;}
.biz-card p{font-size:15px;color:var(--muted);line-height:1.9;margin-bottom:20px;}
.biz-link{display:inline-flex;align-items:center;gap:7px;font-size:14.5px;font-weight:650;color:var(--primary);transition:gap .2s;}
.biz-link:hover{gap:12px;}
/* 整卡可点：链接热区扩展到整张卡片 */
.biz-card .biz-link::after{content:"";position:absolute;inset:0;}
.biz-tag{position:absolute;top:22px;right:22px;font-size:11px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent);background:var(--accent-light);padding:5px 11px;border-radius:999px;}
.biz-note{margin-top:26px;text-align:center;font-size:13.5px;color:var(--muted);}

/* ============ 品类网格 ============ */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:28px 18px;text-align:center;transition:transform .25s, box-shadow .25s, border-color .25s;}
.cat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent;}
.cat-icon{width:52px;height:52px;margin:0 auto 16px;border-radius:13px;background:linear-gradient(145deg, var(--primary-light), #F2F8FC);display:flex;align-items:center;justify-content:center;}
.cat-card h4{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.cat-card p{font-size:12.5px;color:var(--muted);line-height:1.7;}
.cat-divider{display:flex;align-items:center;gap:16px;margin:40px 0 28px;}
.cat-divider .line{flex:1;height:1px;background:var(--line);}
.cat-divider .label{font-size:13px;font-weight:700;letter-spacing:2.5px;color:var(--muted);text-transform:uppercase;}

/* ============ 松领承诺（深色带） ============ */
.promise{position:relative;background:linear-gradient(140deg, var(--ink) 0%, #0C3A3A 55%, #0B4A44 100%);color:#fff;overflow:hidden;}
.promise::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 700px 500px at 88% 15%, rgba(18,165,148,.28), transparent 65%);}
.promise .container{position:relative;z-index:2;}
.promise .sec-eyebrow{color:#5FE3D0;}
.promise .sec-eyebrow::before{background:#5FE3D0;}
.promise .sec-head h2{color:#fff;}
.promise .sec-head p{color:rgba(255,255,255,.72);}
.promise-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.promise-item{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:30px 26px;transition:box-shadow .25s, transform .25s;}
.promise-item:hover{box-shadow:var(--shadow);transform:translateY(-4px);}
.promise-item .ic{width:48px;height:48px;border-radius:12px;background:rgba(18,165,148,.14);display:flex;align-items:center;justify-content:center;margin-bottom:18px;}
.promise-item .ic svg{stroke:var(--accent);}
.promise-item h4{font-size:17px;font-weight:750;margin-bottom:9px;color:var(--ink);}
.promise-item p{font-size:13.5px;color:var(--muted);line-height:1.85;}
.promise-item p a{color:var(--primary);text-decoration:none;}
.promise-item p a:hover{text-decoration:underline;}
.contact-head{display:flex;align-items:center;gap:13px;margin-bottom:13px;}
.contact-head .ic{width:42px;height:42px;border-radius:11px;margin-bottom:0;flex-shrink:0;}
.contact-head h4{margin-bottom:0;}
.contact-item .contact-detail{font-size:16px;line-height:1.8;color:var(--muted);}
.contact-item .contact-detail a{font-size:17.5px;font-weight:700;}

/* ============ 仪器设备 ============ */
.eq-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;}
.eq-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;transition:transform .25s, box-shadow .25s;}
.eq-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);}
.eq-photo{position:relative;height:150px;background:linear-gradient(150deg, #EAF1F7 0%, #D8E6F0 100%);display:flex;align-items:center;justify-content:center;overflow:hidden;}
.eq-photo .ph{font-size:11px;font-weight:600;color:#7A93A8;letter-spacing:1px;text-transform:uppercase;position:absolute;bottom:10px;left:0;right:0;text-align:center;}
.eq-body{padding:18px 18px 20px;}
.eq-body h4{font-size:14.5px;font-weight:700;color:var(--ink);line-height:1.5;margin-bottom:8px;min-height:44px;}
.eq-price{font-size:19px;font-weight:800;color:var(--primary);}
.eq-price .label{font-size:11.5px;font-weight:600;color:var(--muted);margin-right:5px;}

/* ============ Why Us ============ */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.why-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:36px 28px;transition:transform .25s, box-shadow .25s;}
.why-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);}
.why-num{font-size:44px;font-weight:850;line-height:1;color:var(--primary-light);margin-bottom:16px;letter-spacing:-1px;}
.why-card h3{font-size:19px;font-weight:750;color:var(--ink);margin-bottom:11px;}
.why-card p{font-size:14.5px;color:var(--muted);line-height:1.9;}

/* ============ 关于我们 ============ */
.about-grid{display:block;}
.about-text{max-width:880px;}
.about-text h2{font-size:clamp(26px,3vw,36px);font-weight:800;color:var(--ink);line-height:1.4;margin-bottom:22px;}
.about-text p{font-size:15.5px;color:var(--muted);line-height:2.05;margin-bottom:16px;}
.about-values{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:28px;}
.about-value{display:flex;gap:12px;align-items:flex-start;padding:16px;background:var(--bg);border-radius:var(--radius-sm);}
.about-value .ic{width:38px;height:38px;border-radius:10px;background:var(--accent-light);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.about-value h4{font-size:14.5px;font-weight:700;color:var(--ink);margin-bottom:3px;}
.about-value p{font-size:12.5px;color:var(--muted);line-height:1.6;margin:0;}

/* ============ CTA ============ */
.cta{position:relative;background:linear-gradient(120deg, var(--primary) 0%, #1A6FA6 55%, var(--accent) 100%);color:#fff;overflow:hidden;}
.cta::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 600px 400px at 85% 30%, rgba(255,255,255,.14), transparent 65%);}
.cta .container{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;padding:72px 28px;}
.cta h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.4;margin-bottom:12px;}
.cta p{font-size:16px;color:rgba(255,255,255,.82);line-height:1.85;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.btn-white{background:#fff;color:var(--primary);box-shadow:0 6px 20px rgba(0,0,0,.16);}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(0,0,0,.22);}

/* ============ Footer ============ */
.footer{background:var(--ink);color:rgba(255,255,255,.62);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:52px;}
.footer .logo-text .cn{color:#fff;}
.footer .logo-text .en{color:rgba(255,255,255,.45);}
.footer-about{font-size:14px;line-height:1.95;margin-top:18px;color:rgba(255,255,255,.55);}
.footer h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:20px;}
.footer-links li{margin-bottom:12px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.58);transition:color .2s, padding-left .2s;}
.footer-links a:hover{color:#fff;padding-left:5px;}
.footer-contact li{display:flex;gap:11px;align-items:flex-start;font-size:14px;line-height:1.75;margin-bottom:14px;}
.footer-contact .ic{width:32px;height:32px;border-radius:9px;background:rgba(255,255,255,.07);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.09);padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:rgba(255,255,255,.38);}
.footer-bottom a{color:inherit;text-decoration:none;}
.footer-bottom a:hover{color:#fff;}
.footer-ruo{width:100%;font-size:11.5px;color:rgba(255,255,255,.32);line-height:1.7;}
.ch-intro-sec{padding-top:0;}
.ch-intro{font-size:15.5px;line-height:2;color:var(--muted);max-width:920px;margin-bottom:26px;}
.ch-intro strong{color:var(--ink);font-weight:700;}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:26px;}
.guide-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 22px;}
.guide-card h4{font-size:15.5px;font-weight:750;color:var(--ink);margin-bottom:8px;}
.guide-card p{font-size:13px;color:var(--muted);line-height:1.7;}
.guide-card p.use{margin-top:6px;color:var(--accent);font-weight:600;}
.steps-box{background:var(--bg);border-radius:12px;padding:22px 26px;}
.steps-box h4{font-size:15.5px;font-weight:750;color:var(--ink);margin-bottom:12px;}
.steps-box ol{padding-left:20px;}
.steps-box li{font-size:14px;color:var(--muted);line-height:2;}
.steps-box li strong{color:var(--ink);}
.chain-steps{display:grid;gap:14px;max-width:820px;}
.chain-step{display:flex;gap:16px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 22px;}
.chain-step .num{width:34px;height:34px;border-radius:50%;background:rgba(18,165,148,.14);color:var(--accent);font-weight:800;font-size:15px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.chain-step h4{font-size:15.5px;font-weight:750;color:var(--ink);margin-bottom:4px;}
.chain-step p{font-size:13.5px;color:var(--muted);line-height:1.8;}
.chain-note{margin-top:22px;font-size:13px;color:var(--muted);}
.story-title{font-size:20px;font-weight:800;color:var(--ink);margin:26px 0 12px;}
.story-list{margin:0 0 16px 4px;padding-left:18px;}
.story-list li{font-size:15.5px;color:var(--muted);line-height:2;}
.story-list li strong{color:var(--ink);}
.trust-ext{border-left:3px solid var(--accent);padding-left:14px;background:var(--bg);border-radius:0 8px 8px 0;}
.tip-bar{margin-top:22px;background:rgba(18,165,148,.09);border:1px solid rgba(18,165,148,.22);border-radius:10px;padding:13px 18px;font-size:13.5px;color:var(--ink);}
.flow-title{font-size:22px;font-weight:800;color:var(--ink);margin-bottom:20px;}
.flow-steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;}
.flow-step{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 14px;}
.flow-step .num{width:26px;height:26px;border-radius:50%;background:var(--accent);color:#fff;font-weight:750;font-size:12.5px;display:flex;align-items:center;justify-content:center;margin-bottom:9px;}
.flow-step h4{font-size:14px;font-weight:750;color:var(--ink);margin-bottom:6px;}
.flow-step p{font-size:11.5px;color:var(--muted);line-height:1.75;}
.faq-list{display:grid;gap:14px;max-width:860px;}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 24px;}
.faq-item h4{font-size:15.5px;font-weight:750;color:var(--ink);margin-bottom:8px;}
.faq-item p{font-size:14px;color:var(--muted);line-height:1.9;}
.faq-item p a{color:var(--primary);}
.trust-strip{display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:center;padding:18px 24px;background:var(--bg);border-radius:12px;font-size:14.5px;font-weight:650;color:var(--ink);}
.trust-strip span{display:flex;align-items:center;gap:8px;}
.trust-strip span::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);}
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.scene-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px 20px;}
.scene-card h4{font-size:15px;font-weight:750;color:var(--ink);margin-bottom:8px;}
.scene-card p{font-size:13px;color:var(--muted);line-height:1.8;}
@media(max-width:960px){.flow-steps{grid-template-columns:repeat(2,1fr);}.scene-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:640px){.flow-steps,.scene-grid,.guide-grid{grid-template-columns:1fr;}}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .eq-grid{grid-template-columns:repeat(3,1fr);}
  .why-grid{grid-template-columns:repeat(2,1fr);}
  .promise-grid{grid-template-columns:repeat(2,1fr);}
  .hero .container{grid-template-columns:1fr;gap:40px;}
  .hero-visual{height:320px;}
  .about-grid{grid-template-columns:1fr;gap:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:768px){
  .topbar{display:none;}
  .nav{display:none;}
  .nav.open{display:flex;position:absolute;top:74px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 24px 24px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);}
  .nav.open .nav-drop{width:100%;}
  .nav.open .nav-drop-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;padding:0 0 4px 12px;display:flex;flex-wrap:wrap;}
  .menu-toggle{display:flex;}
  .header-cta .btn{display:none;}
  .biz-grid{grid-template-columns:1fr;}
  .cat-grid{grid-template-columns:repeat(2,1fr);}
  .eq-grid{grid-template-columns:repeat(2,1fr);}
  .promise-grid{grid-template-columns:1fr;}
  .why-grid{grid-template-columns:1fr;}
  .about-values{grid-template-columns:1fr;}
  .section{padding:68px 0;}
  .hero .container{padding-top:60px;padding-bottom:60px;}
  .cta .container{padding:56px 28px;}
}
@media (max-width:480px){
  .cat-grid{grid-template-columns:1fr;}
  .eq-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
}