/* ==========================================================================
   印染助剂产品册 · 上海胜友纺织科技有限公司（SHINEU）
   品牌色：深蓝 #1A386B → #264A82，强调冰蓝 #6FD0EF，浅底 #E9EEF3
   注：全站不使用绿色
   ========================================================================== */

:root{
  --navy-900:#0B2347;
  --navy-800:#14315E;
  --navy-700:#1A386B;
  --navy-600:#264A82;
  --navy-500:#2F5A97;
  --ice:#6FD0EF;
  --ice-400:#8FDCF4;
  --ice-300:#B9E7F8;
  --ice-100:#E4F5FC;
  --bg:#F5F8FC;
  --alt:#E9EEF3;
  --card:#FFFFFF;
  --line:#DCE5F0;
  --tx:#123A66;
  --tx-2:#5A6B7D;
  --tx-3:#8A9AAB;
  --r:16px;
  --r-lg:22px;
  --sh:0 1px 2px rgba(18,58,102,.04), 0 8px 24px rgba(18,58,102,.06);
  --sh-lg:0 2px 6px rgba(18,58,102,.06), 0 20px 48px rgba(18,58,102,.13);
  --wrap:1240px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  color:var(--tx);
  background:var(--bg);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:.2px;line-height:1.28}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
strong{font-weight:800}
em{font-style:normal}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 28px}

/* ============================== 按钮 ============================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:700;letter-spacing:.3px;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
  white-space:nowrap;
  -webkit-tap-highlight-color:transparent;
}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-sm{padding:9px 16px;font-size:13.5px;gap:6px}
.btn-lg{padding:16px 30px;font-size:16.5px}

.btn-ice{background:var(--ice);color:var(--navy-900);box-shadow:0 10px 26px rgba(111,208,239,.38)}
.btn-ice:hover{background:#84d8f2;box-shadow:0 14px 32px rgba(111,208,239,.5)}

.btn-outline-ice{background:transparent;color:#fff;border-color:rgba(185,231,248,.5)}
.btn-outline-ice:hover{background:rgba(111,208,239,.14);border-color:var(--ice-300)}

.btn-ghost{background:var(--navy-700);color:#fff}
.btn-ghost:hover{background:var(--navy-600)}

.btn-line{background:#fff;color:var(--navy-700);border-color:var(--line)}
.btn-line:hover{border-color:var(--ice);color:var(--navy-800)}

/* ============================== 顶栏 ============================== */
.topbar{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar-in{display:flex;align-items:center;gap:22px;height:66px}

/* 返回官网首页 */
.back-home{
  display:inline-flex;align-items:center;gap:6px;flex:0 0 auto;
  padding:7px 13px 7px 11px;border-radius:999px;
  font-size:13.5px;font-weight:700;color:var(--navy-700);
  background:var(--ice-100);border:1px solid transparent;
  transition:background .16s,color .16s,border-color .16s,transform .16s;
}
.back-home svg{width:15px;height:15px;flex:none;opacity:.85}
.back-home:hover{background:#fff;border-color:var(--navy-500);color:var(--navy-900);transform:translateX(-2px)}
.back-home:hover svg{opacity:1}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-logo{height:34px;width:auto}
.brand-sep{width:1px;height:22px;background:var(--line)}
.brand-txt{font-size:15.5px;font-weight:800;color:var(--navy-700);letter-spacing:.4px}
.brand-txt em{color:var(--navy-500);font-weight:600;margin-left:5px}

.topnav{display:flex;gap:4px;margin-left:auto}
.topnav a{
  padding:8px 14px;border-radius:999px;font-size:14.5px;color:var(--tx-2);font-weight:600;
  transition:background .16s, color .16s;
}
.topnav a:hover{background:var(--ice-100);color:var(--navy-700)}
.topact{display:flex;gap:9px;align-items:center;margin-left:8px}

/* ============================== 封面 ============================== */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--navy-900) 0%,var(--navy-700) 52%,var(--navy-600) 100%);
  color:#fff;
  padding:84px 0 96px;
}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-bg .hb{position:absolute;border-radius:50%;filter:blur(6px)}
.hb1{width:520px;height:520px;right:-120px;top:-180px;background:radial-gradient(circle,rgba(111,208,239,.34),transparent 68%)}
.hb2{width:420px;height:420px;left:-140px;bottom:-190px;background:radial-gradient(circle,rgba(111,208,239,.20),transparent 70%)}
.hb3{width:230px;height:230px;right:26%;bottom:-90px;background:radial-gradient(circle,rgba(185,231,248,.16),transparent 72%)}

.hero-in{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 306px;gap:56px;align-items:center}

.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:2.2px;font-weight:700;text-transform:uppercase;
  color:var(--ice-300);margin-bottom:20px;
}
.kicker span{width:26px;height:1px;background:rgba(185,231,248,.5)}

.hero h1{font-size:clamp(38px,4.5vw,62px);line-height:1.14;letter-spacing:.5px}
.hero h1 em{
  color:var(--ice);
  background-image:linear-gradient(transparent 66%, rgba(111,208,239,.32) 66%);
  border-radius:2px;padding:0 3px;
}
.hero-sub{margin-top:24px;max-width:640px;font-size:16.5px;line-height:1.85;color:rgba(226,240,252,.88)}
.hero-sub strong{color:#fff}
.hero-sub .hl{color:var(--ice)}

.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}

.hero-stats{display:flex;gap:34px;flex-wrap:wrap;margin-top:46px;padding-top:30px;border-top:1px solid rgba(185,231,248,.2)}
.hero-stats li{display:flex;flex-direction:column;gap:1px}
.hero-stats b{font-size:30px;font-weight:800;letter-spacing:.5px;line-height:1.1}
.hero-stats b i{font-size:14px;font-style:normal;font-weight:700;color:var(--ice);margin-left:3px}
.hero-stats span{font-size:12.5px;color:rgba(200,224,244,.7);letter-spacing:.4px}

.hero-card{
  background:rgba(255,255,255,.09);
  border:1px solid rgba(185,231,248,.28);
  border-radius:var(--r-lg);
  padding:26px 22px;
  text-align:center;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:0 22px 60px rgba(4,18,38,.35);
}
.hc-qr{background:#fff;border-radius:16px;padding:10px;margin:0 auto 16px;width:186px}
.hc-qr img{border-radius:8px}
.hc-t{font-size:15px;font-weight:800;color:#fff}
.hc-s{font-size:12px;color:rgba(200,224,244,.68);margin-top:3px}
.hc-phone{font-size:25px;font-weight:800;color:var(--ice);letter-spacing:1px;margin-top:12px;
  font-variant-numeric:tabular-nums}
.hc-mail{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:9px;font-size:12.5px;color:rgba(200,224,244,.8)}

/* ============================== 区块通用 ============================== */
.sec{padding:88px 0}
.sec-alt{background:var(--alt)}
.proof{background:var(--bg)}

.sec-head{max-width:760px;margin-bottom:48px}
.sec-kicker{
  font-size:12px;letter-spacing:2.2px;font-weight:800;text-transform:uppercase;
  color:var(--navy-500);margin-bottom:14px;
}
.sec-kicker.light{color:var(--ice)}
.sec-head h2{font-size:clamp(27px,3vw,38px);color:var(--navy-800)}
.sec-sub{margin-top:14px;font-size:16px;color:var(--tx-2);line-height:1.8}

/* ============================== 痛点 ============================== */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.pain-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:26px 24px 24px;position:relative;overflow:hidden;
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.pain-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--ice)}
.pain-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:var(--ice-300)}
.pc-ico{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  background:var(--ice-100);color:var(--navy-600);margin-bottom:16px;
}
.pain-scene{
  display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:1.2px;
  color:var(--navy-500);background:var(--ice-100);border-radius:6px;padding:3px 9px;margin-bottom:11px;
}
.pain-card h3{font-size:18px;color:var(--navy-800);margin-bottom:9px}
.pain-card p{font-size:14.2px;color:var(--tx-2);line-height:1.75}
.pain-foot{
  margin-top:34px;text-align:center;font-size:16px;font-weight:700;color:var(--navy-700);
  padding:20px;border-radius:var(--r);background:linear-gradient(90deg,rgba(111,208,239,.13),rgba(111,208,239,.03));
  border:1px dashed var(--ice-300);
}

/* ============================== 四张牌 ============================== */
.pillar-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.pillar{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px 30px 26px;position:relative;overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.pillar:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:var(--ice-300)}
.pillar::after{
  content:"";position:absolute;right:-70px;top:-70px;width:190px;height:190px;border-radius:50%;
  background:radial-gradient(circle,rgba(111,208,239,.13),transparent 68%);
}
.pl-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;position:relative}
.pl-ico{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--navy-700),var(--navy-500));color:var(--ice)}
.pl-no{font-size:34px;font-weight:800;color:var(--alt);letter-spacing:-1px}
.pillar h3{font-size:22px;color:var(--navy-800)}
.pl-sub{font-size:15px;font-weight:700;color:var(--navy-500);margin-top:5px}
.pl-lead{font-size:14.4px;color:var(--tx-2);line-height:1.8;margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
.pl-list{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.pl-list li{display:flex;gap:9px;font-size:14.2px;color:var(--tx);line-height:1.72}
.pl-list svg{flex:0 0 auto;margin-top:5px;color:var(--navy-500)}
.pl-models{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto;padding-top:18px}
.pl-models span{
  font-size:12px;font-weight:800;letter-spacing:.4px;color:var(--navy-700);
  background:var(--ice-100);border:1px solid var(--ice-300);border-radius:7px;padding:3px 10px;
  font-variant-numeric:tabular-nums;
}

/* ============================== 产品 ============================== */
.flow-block{margin-bottom:52px}
.flow-block:last-child{margin-bottom:0}
.flow-head{
  display:flex;align-items:center;gap:18px;
  background:linear-gradient(100deg,var(--navy-800),var(--navy-600));
  border-radius:var(--r) var(--r) 0 0;padding:20px 26px;color:#fff;
}
.flow-no{
  font-size:26px;font-weight:800;color:var(--ice);letter-spacing:1px;
  font-variant-numeric:tabular-nums;line-height:1;
}
.flow-txt{flex:1;min-width:0}
.flow-txt h3{font-size:20px;letter-spacing:.5px}
.flow-txt p{font-size:13px;color:rgba(200,224,244,.75);margin-top:3px}
.flow-en{font-size:11.5px;letter-spacing:2px;color:rgba(185,231,248,.6);font-weight:700}

.prod-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:0;
  border:1px solid var(--line);border-top:0;border-radius:0 0 var(--r) var(--r);
  overflow:hidden;background:var(--card);
}
.prod{
  padding:28px 28px 24px;border-right:1px solid var(--line);border-top:1px solid var(--line);
  display:flex;flex-direction:column;
}
.prod:nth-child(2n){border-right:0}
.prod:nth-child(-n+2){border-top:0}
.prod-grid:has(.prod:nth-child(1):last-child) .prod{border-top:0}
.pr-main{display:flex;flex-direction:column}
.pr-side{margin-top:auto}
/* 单数款时最后一款横跨整行，内部两栏 */
.prod-wide{
  grid-column:1 / -1;border-right:0;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:0 40px;align-items:start;
}
.prod-wide .pr-main,.prod-wide .pr-side{margin-top:0}

.pr-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.pr-head h4{font-size:19.5px;color:var(--navy-800)}
.pr-tagline{font-size:13.5px;font-weight:700;color:var(--navy-500);margin-top:5px}
.pr-model{
  flex:0 0 auto;font-size:13px;font-weight:800;letter-spacing:.5px;
  color:#fff;background:linear-gradient(140deg,var(--navy-700),var(--navy-500));
  border-radius:8px;padding:5px 12px;font-variant-numeric:tabular-nums;
}
.pr-solves{margin-top:16px;font-size:14.3px;color:var(--tx-2);line-height:1.8}

.pr-specs{display:flex;flex-wrap:wrap;gap:7px;margin-top:15px}
.pr-specs span{
  font-size:12px;font-weight:700;color:var(--navy-600);
  background:var(--ice-100);border-radius:999px;padding:4px 11px;
}

.pr-save{
  margin-top:17px;background:linear-gradient(120deg,rgba(111,208,239,.13),rgba(111,208,239,.04));
  border-left:3px solid var(--ice);border-radius:0 10px 10px 0;padding:14px 16px;
}
.pr-save-k{
  display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:1.4px;
  color:var(--navy-500);margin-bottom:6px;
}
.pr-save p{font-size:14px;line-height:1.78;color:var(--tx)}

.pr-meta{margin:18px 0 0;display:flex;flex-direction:column;gap:9px}
.pr-meta div{display:flex;gap:12px;align-items:baseline}
.pr-meta dt{flex:0 0 auto;font-size:12.5px;font-weight:700;color:var(--tx-3);letter-spacing:.5px}
.pr-meta dd{margin:0;font-size:13.3px;color:var(--tx)}
.pr-bench{color:var(--tx-2)}

.pr-faq{margin-top:18px}
.pr-faq summary{
  display:flex;align-items:center;gap:8px;width:fit-content;
  font-size:13.5px;font-weight:700;color:var(--navy-600);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 15px;
  cursor:pointer;list-style:none;transition:border-color .16s,background .16s;
}
.pr-faq summary::-webkit-details-marker{display:none}
.pr-faq summary:hover{border-color:var(--ice);background:var(--ice-100)}
.pr-faq summary::after{
  content:"";width:7px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:rotate(45deg) translateY(-2px);transition:transform .2s;margin-left:2px;
}
.pr-faq[open] summary::after{transform:rotate(-135deg) translateY(-2px)}
.pr-faq[open] summary{border-color:var(--ice);background:var(--ice-100)}
.faq-body{margin-top:14px;display:flex;flex-direction:column;gap:14px;padding-left:2px}
.qa{padding-left:14px;border-left:2px solid var(--ice-100)}
.qa-q{font-size:13.8px;font-weight:800;color:var(--navy-700);line-height:1.7}
.qa-q::before{content:"Q ";color:var(--ice);font-weight:800}
.qa-a{font-size:13.6px;color:var(--tx-2);line-height:1.8;margin-top:5px}
.qa-a::before{content:"A ";color:var(--navy-500);font-weight:800}

/* ============================== 四步 ============================== */
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s}
.step{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:28px 24px 24px;transition:transform .2s, box-shadow .2s, border-color .2s;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:var(--ice-300)}
.step::after{
  content:"";position:absolute;top:44px;right:-11px;width:22px;height:1px;
  background:repeating-linear-gradient(90deg,var(--ice-300) 0 5px,transparent 5px 9px);
}
.step:last-child::after{display:none}
.st-no{
  display:grid;place-items:center;width:42px;height:42px;border-radius:12px;
  background:linear-gradient(140deg,var(--navy-700),var(--navy-500));
  color:var(--ice);font-size:19px;font-weight:800;margin-bottom:16px;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:17.5px;color:var(--navy-800)}
.step p{margin-top:9px;font-size:14px;color:var(--tx-2);line-height:1.78}
.step-cta{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:40px}
.step-note{font-size:13.5px;color:var(--tx-3)}

/* ============================== 背书 ============================== */
.proof-in{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:start}
.proof h2{font-size:clamp(27px,3vw,38px);color:var(--navy-800);margin-bottom:26px}
.cert-list{display:flex;flex-direction:column;gap:13px}
.cert-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--tx)}
.cert-list svg{flex:0 0 auto;margin-top:4px;color:var(--navy-500)}
.region-box{
  margin-top:28px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;
  display:flex;flex-direction:column;gap:9px;
}
.region-box p{font-size:13.5px;color:var(--tx-2);line-height:1.7}
.region-box span{
  display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:1.2px;color:var(--navy-500);
  background:var(--ice-100);border-radius:6px;padding:2px 8px;margin-right:9px;
}

.proof-quote{
  background:linear-gradient(135deg,var(--navy-800),var(--navy-600));
  border-radius:var(--r-lg);padding:34px 32px;color:#fff;position:relative;overflow:hidden;
}
.proof-quote::after{
  content:"";position:absolute;right:-60px;bottom:-70px;width:190px;height:190px;border-radius:50%;
  background:radial-gradient(circle,rgba(111,208,239,.24),transparent 70%);
}
.pq-t{font-size:20px;font-weight:800;line-height:1.6;position:relative}
.pq-s{margin-top:14px;font-size:13px;color:var(--ice-300);letter-spacing:.5px;position:relative}
.proof-stats{margin-top:20px;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.proof-stats li{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 18px 16px;
}
.proof-stats b{display:block;font-size:27px;font-weight:800;color:var(--navy-700);line-height:1.15;letter-spacing:.3px}
.proof-stats b i{font-size:13px;font-style:normal;color:var(--navy-500);margin-left:3px}
.proof-stats span{display:block;font-size:14px;font-weight:700;color:var(--tx);margin-top:3px}
.proof-stats em{display:block;font-size:12.3px;font-style:normal;color:var(--tx-3);margin-top:4px;line-height:1.6}

/* ============================== 联系 ============================== */
.contact{
  background:linear-gradient(135deg,var(--navy-900) 0%,var(--navy-700) 55%,var(--navy-600) 100%);
  color:#fff;padding:84px 0;position:relative;overflow:hidden;
}
.contact::before{
  content:"";position:absolute;left:-140px;top:-160px;width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle,rgba(111,208,239,.2),transparent 70%);
}
.contact-in{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 292px;gap:56px;align-items:center}
.contact h2{font-size:clamp(26px,3vw,36px);margin-top:10px}
.ct-sub{margin-top:16px;font-size:15.5px;color:rgba(226,240,252,.82);line-height:1.85;max-width:620px}
.ct-list{margin-top:32px;display:flex;flex-direction:column;gap:18px}
.ct-list li{display:flex;gap:14px;align-items:flex-start}
.ct-list svg{flex:0 0 auto;margin-top:4px;color:var(--ice)}
.ct-list span{display:block;font-size:12px;letter-spacing:1.2px;color:rgba(185,231,248,.7);font-weight:700}
.ct-list a,.ct-list p{font-size:16.5px;font-weight:700;color:#fff;margin-top:2px;line-height:1.6}
.ct-list a:hover{color:var(--ice)}
.ct-list p{font-size:15px;font-weight:500;color:rgba(226,240,252,.9)}
.ct-addr{margin-top:30px;font-size:12.5px;color:rgba(185,231,248,.62);letter-spacing:.5px}

.ct-qr{
  background:rgba(255,255,255,.09);border:1px solid rgba(185,231,248,.28);border-radius:var(--r-lg);
  padding:24px 22px;text-align:center;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.ct-qr img:first-child{width:186px;background:#fff;border-radius:16px;padding:10px;margin:0 auto 14px}
.ct-qr p{font-size:15px;font-weight:800}
.ct-qr span{display:block;font-size:12.5px;color:rgba(200,224,244,.7);margin-top:2px}
.ct-logo{height:30px;width:auto;margin:20px auto 0;opacity:.92}

/* ============================== 页脚 ============================== */
.foot{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  padding:30px 28px 38px;border-top:1px solid var(--line);margin-top:0;
  background:var(--bg);
}
.foot img{height:28px;width:auto;opacity:.85}
.foot p{font-size:13.5px;font-weight:700;color:var(--navy-700)}
.foot-sub{font-size:12.5px;font-weight:500;color:var(--tx-3);margin-top:2px}
.foot-note{margin-left:auto;font-size:12px;color:var(--tx-3)}

/* ============================== 问答总表（仅打印） ============================== */
.qa-appendix{display:none}

/* ============================== 回到顶部 ============================== */
.totop{
  position:fixed;right:22px;bottom:24px;z-index:70;
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:var(--navy-700);display:grid;place-items:center;
  box-shadow:var(--sh-lg);transition:transform .18s, color .18s, border-color .18s;
}
.totop:hover{transform:translateY(-3px);color:var(--navy-500);border-color:var(--ice)}
.totop[hidden]{display:none}

/* ============================== 渐显 ============================== */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.in{opacity:1;transform:none;transition:opacity .5s ease, transform .5s cubic-bezier(.22,1,.36,1)}

/* ============================== 响应式 ============================== */
@media (max-width:1080px){
  .topnav{display:none}
  .hero-in{grid-template-columns:1fr;gap:40px}
  .hero-card{max-width:360px}
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .proof-in,.contact-in{grid-template-columns:1fr;gap:40px}
  .step-grid{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(2n)::after{display:none}
  .prod-grid{grid-template-columns:1fr}
  .prod{border-right:0}
  .prod:nth-child(2){border-top:1px solid var(--line)}
  .prod-wide{grid-template-columns:1fr;gap:0}
  .prod-wide .pr-side{margin-top:0}
}

@media (max-width:860px){
  .wrap{padding:0 20px}
  .topbar-in{height:62px;gap:12px}
  .brand-logo{height:30px}
  .brand-sep,.brand-txt em{display:none}
  .back-home{padding:7px 10px;gap:0}
  .back-home .bh-txt{display:none}
  .brand{gap:9px}
  .hero{padding:52px 0 64px}
  .hero-sub{font-size:15.5px}
  .hero-cta{gap:11px}
  .hero-cta .btn{flex:1 1 100%;justify-content:center}
  .hero-stats{gap:22px 26px;margin-top:34px;padding-top:24px}
  .hero-stats b{font-size:25px}
  .sec{padding:60px 0}
  .sec-head{margin-bottom:34px}
  .pain-grid{grid-template-columns:1fr;gap:14px}
  .pillar-grid{grid-template-columns:1fr;gap:16px}
  .step-grid{grid-template-columns:1fr;gap:14px}
  .step::after{display:none}
  .flow-head{padding:16px 18px;gap:13px;flex-wrap:wrap}
  .flow-en{display:none}
  .prod{padding:24px 20px 20px}
  .pr-head{flex-direction:column;gap:10px}
  .prod-grid{border-radius:0 0 var(--r) var(--r)}
  .proof-stats{grid-template-columns:1fr 1fr}
  .foot{flex-direction:column;align-items:flex-start;gap:12px}
  .foot-note{margin-left:0}
  .totop{right:16px;bottom:16px}
  .hide-xs{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
  .btn,.pain-card,.pillar,.step,.totop{transition:none}
}

/* ============================== 打印 / 存 PDF ============================== */
@page{size:A4 portrait;margin:12mm 11mm}

@media print{
  :root{--sh:none;--sh-lg:none}
  html,body{background:#fff}
  body{font-size:10.6pt;line-height:1.6;overflow:visible}

  .topbar,.totop,.hero-cta,.step-cta,.pr-faq summary::after{display:none !important}
  .print-open-hint{display:none !important}

  /* 保留深蓝与冰蓝 */
  *{-webkit-print-color-adjust:exact !important;print-color-adjust:exact !important}

  .hero{padding:26px 0 30px;border-radius:0}
  .hero-in{grid-template-columns:minmax(0,1fr) 210px;gap:26px}
  .hero-card{padding:14px}
  .hc-qr{width:118px;padding:7px;margin-bottom:9px}
  .hc-phone{font-size:17pt}
  .hero h1{font-size:26pt}
  .hero-sub{font-size:10.4pt;margin-top:12px}
  .hero-stats{margin-top:20px;padding-top:14px;gap:22px}
  .hero-stats b{font-size:16pt}

  .sec{padding:22px 0}
  .sec-head{margin-bottom:16px}
  .sec-head h2{font-size:17pt}
  .sec-sub{font-size:10.4pt;margin-top:8px}
  .sec-kicker{font-size:8pt;margin-bottom:6px;letter-spacing:1.6px}

  .wrap{max-width:100%;padding:0}
  /* 深色满幅区块内的文字要留内边距，否则贴到纸张边缘 */
  .hero-in,.contact-in{padding:0 5mm}
  .foot{padding-left:5mm;padding-right:5mm}

  /* 卡片与工序块都不跨页断裂；每个工序自成一段 */
  .pain-card,.pillar,.step,.prod,.proof-quote,.proof-stats li,.region-box{break-inside:avoid;page-break-inside:avoid}
  .flow-block{break-inside:avoid;page-break-inside:avoid}
  .flow-head{break-after:avoid;page-break-after:avoid;break-inside:avoid}
  .sec-head{break-after:avoid;page-break-after:avoid}
  /* 产品清单另起一页，避免小标题孤零零吊在页脚 */
  #products{break-before:page;page-break-before:always}
  #start{break-before:page;page-break-before:always}

  .pain-grid{grid-template-columns:repeat(3,1fr);gap:9px}
  .pain-card{padding:11px 11px 10px}
  .pc-ico{width:30px;height:30px;border-radius:9px;margin-bottom:8px}
  .pc-ico svg{width:16px;height:16px}
  .pain-card h3{font-size:11.4pt}
  .pain-card p{font-size:9.4pt;line-height:1.62}
  .pain-scene{font-size:7.4pt;padding:2px 6px;margin-bottom:6px}
  .pain-foot{margin-top:12px;padding:9px;font-size:11pt}

  .pillar-grid{grid-template-columns:1fr 1fr;gap:10px}
  .pillar{padding:13px 13px 11px}
  .pillar h3{font-size:13pt}
  .pl-sub{font-size:9.8pt}
  .pl-lead{font-size:9.2pt;margin-top:8px;padding-top:8px;line-height:1.6}
  .pl-list{gap:5px;margin-top:8px}
  .pl-list li{font-size:9.2pt;line-height:1.6}
  .pl-models span{font-size:7.6pt;padding:1px 6px}
  .pl-ico{width:32px;height:32px;border-radius:9px}
  .pl-ico svg{width:17px;height:17px}
  .pl-no{font-size:20pt}

  .flow-block{margin-bottom:11px}
  .flow-head{padding:9px 13px;border-radius:10px 10px 0 0}
  .flow-txt h3{font-size:12.5pt}
  .flow-txt p{font-size:8.6pt}
  .flow-no{font-size:14pt}
  .flow-en{font-size:7.2pt}

  .prod-grid{grid-template-columns:1fr 1fr;border-radius:0 0 10px 10px}
  .prod{padding:11px 12px 9px}
  .prod:nth-child(2){border-top:0}
  .prod:nth-child(-n+2){border-top:0}
  .prod:nth-child(2n){border-right:0}
  .prod-wide{grid-column:1 / -1;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0 14px}
  .pr-head h4{font-size:11.4pt}
  .pr-tagline{font-size:8.6pt;margin-top:2px}
  .pr-model{font-size:8.2pt;padding:2px 7px;border-radius:6px}
  .pr-solves{font-size:8.7pt;margin-top:6px;line-height:1.55}
  .pr-specs{gap:3px;margin-top:6px}
  .pr-specs span{font-size:7.2pt;padding:1.5px 6px}
  .pr-save{margin-top:7px;padding:7px 9px}
  .pr-save p{font-size:8.7pt;line-height:1.55}
  .pr-save-k{font-size:7pt;margin-bottom:2px;letter-spacing:1px}
  .pr-meta{margin-top:7px;gap:3px}
  .pr-meta dt{font-size:7.6pt}
  .pr-meta dd{font-size:8.2pt}
  .pr-faq{margin-top:7px}
  .pr-faq summary{
    font-size:8.7pt;padding:0;border:0;background:none;font-weight:800;color:var(--navy-700);
  }
  .pr-faq summary svg{width:11px;height:11px}
  .faq-body{margin-top:5px;gap:6px}
  .qa{padding-left:7px}
  .qa-q{font-size:8.6pt;line-height:1.55}
  .qa-a{font-size:8.6pt;margin-top:1px;line-height:1.55}

  /* 产品卡内不再展开问答，统一挪到册末总表，卡片压扁后每页能装两组 */
  .pr-faq{display:none !important}

  .qa-appendix{display:block;break-before:page;page-break-before:always;padding:0 0 12px}
  .qa-appendix .sec-head{margin-bottom:12px}
  .qa-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:9px 20px;align-items:start}
  .qa-prod{break-inside:avoid;page-break-inside:avoid}
  .qa-prod h3{
    font-size:10pt;color:var(--navy-800);padding-bottom:3px;
    border-bottom:1px solid var(--line);margin-bottom:6px;
  }
  .qa-prod h3 span{font-size:8pt;font-weight:700;color:var(--navy-500);margin-left:6px;letter-spacing:.5px}
  .qa-appendix .qa{padding-left:7px;margin-bottom:5px}
  .qa-appendix .qa:last-child{margin-bottom:0}

  .step-grid{grid-template-columns:repeat(4,1fr);gap:9px}
  .step{padding:12px 12px 10px}
  .step::after{display:none}
  .st-no{width:26px;height:26px;border-radius:8px;font-size:11pt;margin-bottom:8px}
  .step h3{font-size:11pt}
  .step p{font-size:9pt;margin-top:4px;line-height:1.6}

  .proof-in{grid-template-columns:1fr 1fr;gap:20px}
  .proof h2{font-size:17pt;margin-bottom:12px}
  .cert-list{gap:6px}
  .cert-list li{font-size:9.6pt}
  .region-box{margin-top:12px;padding:10px 12px;gap:5px}
  .region-box p{font-size:9pt}
  .proof-quote{padding:16px 15px}
  .pq-t{font-size:12.5pt}
  .pq-s{font-size:9pt;margin-top:8px}
  .proof-stats{margin-top:10px;gap:8px}
  .proof-stats li{padding:10px}
  .proof-stats b{font-size:15pt}
  .proof-stats span{font-size:9.6pt}
  .proof-stats em{font-size:8.4pt}

  .contact{padding:24px 0;break-before:auto}
  .contact-in{grid-template-columns:minmax(0,1fr) 200px;gap:24px}
  .contact h2{font-size:16pt}
  .ct-sub{font-size:9.6pt;margin-top:8px}
  .ct-list{margin-top:14px;gap:9px}
  .ct-list a{font-size:12pt}
  .ct-list p{font-size:9.6pt}
  .ct-list span{font-size:8pt}
  .ct-qr{padding:14px}
  .ct-qr img:first-child{width:120px;padding:7px;margin-bottom:8px}
  .ct-logo{margin-top:10px;height:22px}
  .ct-addr{margin-top:14px;font-size:8.4pt}

  .foot{padding:14px 0 0;gap:10px;border-top:1px solid var(--line)}
  .foot img{height:20px}
  .foot p{font-size:9.6pt}
  .foot-sub{font-size:8.4pt}
  .foot-note{font-size:8.4pt}
  /* 页脚内容已并入联系区与册末说明，打印时不再单占一页 */
  .foot{display:none !important}
  .qa-note{
    margin-top:10px;padding-top:8px;border-top:1px solid var(--line);
    font-size:8.4pt;color:var(--tx-3);
  }

  .reveal,.reveal.in{opacity:1 !important;transform:none !important;transition:none !important}
  a{text-decoration:none;color:inherit}
}