/* ==========================================================================
   上海油威液压 · 液压系统定制站样式（模板化设计 / 响应式）
   ========================================================================== */
:root{
  --navy:#0A2C52; --navy2:#0E3F76; --blue:#12518F; --teal:#00AFBA; --teal2:#019AA4;
  --gold:#F5A623; --ink:#1F2C3A; --body:#33475F; --sub:#647789; --line:#E1E9F2;
  --bg:#F2F6FB; --card:#FFFFFF; --soft:#F7FBFF; --shadow:0 6px 20px rgba(10,44,82,.07);
  --radius:12px; --wrap:1200px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--body);
  font:16px/1.85 "Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none;transition:color .18s}
a:hover{color:var(--teal)}
h1,h2,h3,h4{color:var(--navy);font-weight:700;line-height:1.4}
h1{font-size:clamp(21px,2.4vw,30px);margin:0 0 14px}
h2{font-size:clamp(18px,1.9vw,22px);margin:26px 0 12px;padding-left:13px;position:relative}
h2:before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--teal),var(--blue))}
h2.inbox:before{display:none}
h3{font-size:17px;margin:16px 0 8px}
p{margin:0 0 12px}
ul,ol{margin:0 0 12px;padding-left:20px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 18px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:10px;top:10px;background:#fff;padding:8px 14px;border-radius:8px;z-index:99;box-shadow:var(--shadow)}
/* ---------- header ---------- */
.topbar{background:var(--navy);color:#BFD3E8;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:12px;height:36px}
.topbar a{color:#BFD3E8}
.topbar a:hover{color:#fff}
.topbar .tb-right{display:flex;gap:16px}
.topbar b{color:#fff}
.site-head{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;
  box-shadow:0 2px 14px rgba(10,44,82,.06)}
.head-inner{display:flex;align-items:center;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;color:var(--navy)}
.brand-mark{width:46px;height:46px;border-radius:11px;display:grid;place-items:center;color:#fff;font-weight:800;
  letter-spacing:1px;background:linear-gradient(135deg,var(--navy2),var(--teal));font-size:15px}
.brand-text{display:flex;flex-direction:column;line-height:1.3}
.brand-text strong{font-size:18px;letter-spacing:.5px}
.brand-text small{color:var(--sub);font-size:12.5px;letter-spacing:.4px}
.nav{margin-left:auto;display:flex;flex-wrap:wrap;gap:2px}
.nav a{padding:9px 12px;border-radius:8px;font-size:15px;color:var(--ink);white-space:nowrap}
.nav a:hover,.nav a.on{background:var(--soft);color:var(--blue)}
.head-tel{margin-left:10px;padding-left:16px;border-left:1px solid var(--line);text-align:right;line-height:1.3}
.head-tel a{font-size:20px;font-weight:800;color:var(--teal);letter-spacing:.5px}
.head-tel span{display:block;font-size:12px;color:var(--sub)}
.navtog,.navbtn,.mnav{display:none}
/* ---------- breadcrumb ---------- */
.crumbs{background:#fff;border-bottom:1px solid var(--line);font-size:13px;color:var(--sub)}
.crumbs .wrap{padding:10px 18px}
.crumbs a{color:var(--sub)}
.crumbs a:hover{color:var(--teal)}
.crumbs .sep{margin:0 7px;color:#C3CFDC}
/* ---------- hero (home) ---------- */
.hero{position:relative;border-radius:var(--radius);overflow:hidden;color:#fff;background:var(--navy);
  padding:0;border:0;margin:0 0 18px;box-shadow:var(--shadow)}
.hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.98;filter:brightness(1.06) saturate(1.05)}
.hero:after{content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(5,22,44,.84) 0%,rgba(8,36,68,.56) 46%,rgba(8,42,78,.16) 100%)}
.hero-inner{position:relative;z-index:2;padding:64px 18px 58px;max-width:var(--wrap);margin:0 auto}
.hero .eyebrow{display:inline-block;background:rgba(0,175,186,.22);border:1px solid rgba(0,175,186,.55);
  color:#A9ECF1;border-radius:20px;padding:4px 14px;font-size:13px;margin-bottom:14px}
.hero h1{color:#fff;font-size:clamp(24px,3.2vw,40px);margin:0 0 14px;letter-spacing:.5px}
.hero h1 em{color:#5FD8E0;font-style:normal}
.hero p{color:#E3EEFA;max-width:820px;font-size:16.5px;margin:0 0 8px;text-shadow:0 1px 10px rgba(0,0,0,.5)}
.hero h1,.pagehero h1{text-shadow:0 2px 14px rgba(0,0,0,.5)}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 22px}
.hero-tags span{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);border-radius:20px;
  padding:5px 14px;font-size:13.5px;color:#F2F8FD}
.hero-btn{display:flex;flex-wrap:wrap;gap:12px;margin:0}
.btn{display:inline-block;background:linear-gradient(135deg,var(--teal),var(--teal2));color:#fff;
  padding:13px 26px;border-radius:9px;font-weight:700;font-size:15.5px;box-shadow:0 8px 20px rgba(0,175,186,.28)}
.btn:hover{color:#fff;filter:brightness(1.06);transform:translateY(-1px)}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,.5);box-shadow:none;color:#fff}
.btn.small{padding:9px 18px;font-size:14.5px}
.statband{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin:0 0 18px}
.statband div{padding:20px 12px;text-align:center;border-right:1px solid var(--line)}
.statband div:last-child{border-right:0}
.statband b{display:block;font-size:26px;color:var(--teal);letter-spacing:1px}
.statband span{font-size:13.5px;color:var(--sub)}
/* ---------- page hero (inner pages) ---------- */
.pagehero{position:relative;overflow:hidden;color:#fff;background:var(--navy2);min-height:230px}
.pagehero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.94;filter:brightness(1.08) saturate(1.06)}
.pagehero:after{content:"";position:absolute;inset:0;
  background:linear-gradient(95deg,rgba(5,22,44,.86),rgba(8,36,68,.5) 52%,rgba(8,44,80,.14))}
.pagehero .ph-inner{position:relative;z-index:2;padding:44px 18px 40px;max-width:var(--wrap);margin:0 auto}
.pagehero h1{color:#fff;margin:0 0 10px;font-size:clamp(21px,2.6vw,32px)}
.pagehero .ph-sub{color:#E6F0FA;font-size:15.5px;margin:0 0 12px;max-width:900px;text-shadow:0 1px 8px rgba(0,0,0,.45)}
.pagehero .ph-pills{display:flex;flex-wrap:wrap;gap:8px}
.pagehero .ph-pills span{background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.24);
  border-radius:18px;padding:4px 13px;font-size:13px;color:#E4F0FA}
/* ---------- layout ---------- */
main{padding:22px 0 12px}
main .wrap{padding:0 18px}
section{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;margin:0 0 18px;box-shadow:var(--shadow)}
.lead{background:linear-gradient(180deg,#F1F8FF,#E9F3FD);border:1px solid #D3E6F8;border-left:5px solid var(--teal);
  border-radius:var(--radius);padding:17px 20px;margin:0 0 18px;box-shadow:var(--shadow)}
.lead p{margin:0;font-size:15.5px;color:#26405C}
.meta-line{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 18px}
.pill{background:var(--soft);color:var(--blue);border:1px solid #D6E7F8;border-radius:20px;padding:5px 13px;font-size:13px}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:0 0 18px}
.box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;
  box-shadow:var(--shadow)}
.pts{list-style:none;padding:0;margin:0}
.pts li{position:relative;padding:0 0 10px 26px}
.pts li:before{content:"";position:absolute;left:2px;top:.62em;width:9px;height:9px;border-radius:3px;
  background:linear-gradient(135deg,var(--teal),var(--blue))}
/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(272px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(10,44,82,.14)}
.card .thumb{position:relative;display:block;aspect-ratio:16/10;overflow:hidden;background:#E7EEF6}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.card:hover .thumb img{transform:scale(1.05)}
.card .thumb .cat{position:absolute;left:10px;top:10px;background:rgba(10,44,82,.82);color:#fff;
  border-radius:6px;padding:3px 9px;font-size:12.5px;backdrop-filter:blur(2px)}
.card .body{padding:15px 17px 17px;display:flex;flex-direction:column;gap:7px;flex:1}
.card h3{margin:0;font-size:16.5px}
.card h3 a{color:var(--navy)}
.card p{margin:0;color:var(--sub);font-size:14.4px}
.card .press{color:var(--teal2);font-weight:700;font-size:13.5px}
.card .more{color:var(--teal2);font-size:13.5px;font-weight:700;margin-top:auto}
.card.plain{padding:18px 20px;gap:8px}
.card.news .date{color:var(--sub);font-size:13px}
.exlist{list-style:none;margin:0;padding:0;columns:2;column-gap:28px}
.exlist li{margin:0 0 9px;break-inside:avoid;font-size:14.8px}
.exlist .excat{display:inline-block;background:var(--soft);color:var(--blue);border-radius:5px;
  padding:1px 8px;font-size:12.5px;margin-right:8px}
.exlist .abs{display:block;color:var(--sub);font-size:13.5px}
.exlist .qmark{display:inline-block;background:linear-gradient(135deg,var(--teal),var(--blue));color:#fff;
  border-radius:5px;width:20px;text-align:center;margin-right:8px;font-size:12px}
/* ---------- table ---------- */
.table-wrap{overflow-x:auto;margin:0 0 8px;border-radius:10px}
table{border-collapse:collapse;width:100%;min-width:440px;font-size:14.6px}
th,td{border:1px solid var(--line);padding:10px 13px;text-align:left;vertical-align:top}
thead th{background:linear-gradient(180deg,#EEF6FD,#E3EFFA);color:var(--navy);font-weight:700}
tbody th{background:#FAFCFE;width:200px;font-weight:600;color:var(--navy)}
tbody tr:nth-child(even) td{background:#FCFDFF}
/* ---------- faq ---------- */
.faq details{border:1px solid var(--line);border-radius:10px;margin:0 0 10px;background:#FCFDFF;overflow:hidden}
.faq details[open]{border-color:#CFE4F5;background:#fff}
.faq summary{cursor:pointer;padding:13px 44px 13px 15px;font-weight:700;color:var(--navy);list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary:before{content:"Q";position:absolute;left:15px;top:13px;color:var(--teal);font-weight:800}
.faq summary{padding-left:40px}
.faq summary:after{content:"+";position:absolute;right:16px;top:11px;color:var(--teal);font-size:20px;font-weight:400}
.faq details[open] summary:after{content:"–"}
.faq .ans{padding:2px 16px 14px 40px;border-top:1px dashed var(--line);color:var(--body)}
.faq .ans p{margin:10px 0 0;font-size:15px}
/* ---------- misc blocks ---------- */
.rel ul{columns:2;column-gap:28px;padding-left:18px;margin:0}
.rel li{margin:0 0 7px;break-inside:avoid}
.kwbox{background:#FBFDFF}
.kwbox .tag{display:inline-block;background:var(--soft);border:1px solid #DCE9F7;color:var(--blue);
  border-radius:14px;padding:3px 11px;margin:3px 6px 3px 0;font-size:13px}
.cta{display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;color:#fff;
  border:0;border-radius:var(--radius);padding:24px;position:relative;overflow:hidden;
  background:linear-gradient(120deg,var(--navy) 0%,var(--navy2) 52%,#0C5F72 100%)}
.cta:before{content:"";position:absolute;right:-40px;top:-60px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,175,186,.34),transparent 68%)}
.cta>div{position:relative;z-index:2}
.cta strong{font-size:18px;display:block;margin-bottom:6px}
.cta p{margin:0;color:#D5E8F6;font-size:14.6px;max-width:760px}
.cta .btn{z-index:2}
.steps{padding-left:22px}
.steps li{margin:0 0 9px}
.contact-inline{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.more-link{font-weight:700}
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.gallery img{border-radius:10px;border:1px solid var(--line);aspect-ratio:4/3;object-fit:cover}
.inline-fig{width:100%;border-radius:10px;border:1px solid var(--line);box-shadow:var(--shadow);object-fit:cover;aspect-ratio:16/10}
/* ---------- footer ---------- */
.site-foot{background:linear-gradient(180deg,#0A2C52,#08223F);color:#B9D0E6;margin-top:30px;
  padding:30px 0 16px;font-size:14.4px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:26px}
.site-foot h4{color:#fff;margin:0 0 12px;font-size:16px;position:relative;padding-left:12px}
.site-foot h4:before{content:"";position:absolute;left:0;top:.3em;bottom:.3em;width:3px;border-radius:2px;
  background:var(--teal)}
.site-foot ul{list-style:none;margin:0;padding:0}
.site-foot li{margin:0 0 7px}
.site-foot a{color:#B9D0E6}
.site-foot a:hover{color:#fff}
.foot-kw{color:#8FAFCC;font-size:13px;margin-top:10px}
.foot-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.foot-chips a{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13);border-radius:14px;
  padding:3px 11px;font-size:12.5px;color:#A9C4DC}
.foot-bottom{display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;color:#8FAFCC;font-size:13px;
  border-top:1px solid rgba(255,255,255,.12);margin-top:22px;padding-top:14px}
/* ---------- responsive ---------- */
@media(max-width:1040px){
  .nav a{padding:9px 10px;font-size:14.5px}
  .head-tel a{font-size:18px}
}
@media(max-width:900px){
  .topbar{display:none}
  .cols,.contact-inline{grid-template-columns:1fr}
  .exlist,.rel ul{columns:1}
  .head-inner{flex-wrap:wrap;gap:10px;min-height:64px;padding-top:10px;padding-bottom:10px}
  .brand-mark{width:40px;height:40px;font-size:13px}
  .brand-text strong{font-size:16.5px}
  .nav{display:none}
  .head-tel{margin-left:auto;padding-left:0;border:0}
  .head-tel a{font-size:17px}
  .navbtn{display:block;margin-left:6px;width:44px;height:40px;border:1px solid var(--line);
    border-radius:9px;padding:11px 11px;cursor:pointer}
  .navbtn span{display:block;height:2px;background:var(--navy);border-radius:2px;margin:0 0 5px}
  .navbtn span:last-child{margin-bottom:0}
  .navtog{display:none}
  .navtog:checked ~ .site-head .mnav{display:block}
  .mnav{display:none;border-top:1px solid var(--line);background:#fff;box-shadow:0 10px 18px rgba(10,44,82,.08)}
  .mnav nav{display:flex;flex-wrap:wrap;gap:7px;padding:12px 4px}
  .mnav a{background:var(--soft);border-radius:8px;padding:9px 13px;font-size:14.5px;color:var(--blue)}
  .statband{grid-template-columns:1fr 1fr}
  .statband div:nth-child(2){border-right:0}
  .statband div:nth-child(1),.statband div:nth-child(2){border-bottom:1px solid var(--line)}
  .hero-inner{padding:40px 18px 38px}
  .pagehero{min-height:180px}
  .pagehero .ph-inner{padding:30px 18px 26px}
  section{padding:16px 15px}
  .foot-grid{grid-template-columns:1fr 1fr}
  table{font-size:13.8px}
  th,td{padding:8px 10px}
  tbody th{width:130px}
  .cards{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .cards{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  h1{font-size:21px}
  .statband b{font-size:22px}
}

/* ---------- 类别页产品照片 ---------- */
.prodfigs{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:0 0 18px}
.prodfigs img{display:block;width:100%;border-radius:var(--radius);border:1px solid var(--line);
  aspect-ratio:3/2;object-fit:cover;box-shadow:var(--shadow)}
@media (max-width:720px){.prodfigs{grid-template-columns:1fr;gap:12px}}

/* ---------- 专题页 ---------- */
.topic-class{margin:0 0 6px}
.schema{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px 10px;
  margin:0 0 18px;box-shadow:var(--shadow)}
.schema svg{width:100%;height:auto;display:block}
.schema-cap{font-size:12.5px;color:#647789;margin:0 0 10px}
.topic-clsfig img{display:block;width:100%;border-radius:var(--radius);border:1px solid var(--line);
  aspect-ratio:3/2;object-fit:cover;box-shadow:var(--shadow)}
.topic-clsfig p{font-size:13px;color:#647789;margin:8px 0 0}
.topics-grid .thumb img{aspect-ratio:16/10;object-fit:cover}

/* ---------- 照片编号（替换对照用） ---------- */
.iw{position:relative;display:block}
.iw>img{width:100%}
.ino{position:absolute;left:0;right:0;bottom:0;z-index:3;display:block;text-align:center;
  background:rgba(10,44,82,.74);color:#fff;font-size:11px;line-height:17px;font-weight:500;
  letter-spacing:.4px;pointer-events:none;font-style:normal}
.card .thumb .iw{position:absolute;inset:0}
.hero .ino,.pagehero .ino{left:auto;right:12px;bottom:10px;width:auto;padding:2px 10px;
  border-radius:12px;z-index:6;line-height:16px}

/* ---------- FIT 头图（整图完整显示） ---------- */
.pagehero.fit{min-height:320px}
.pagehero .hero-blur{position:absolute;inset:-44px;background-position:center;background-size:cover;
  filter:blur(28px) brightness(.68) saturate(.9);transform:scale(1.04)}
.pagehero.fit img{object-fit:contain}
@media (max-width:720px){.pagehero.fit{min-height:220px}}

/* ---------- 首页 hero：按图片比例自适应高度（避免裁切 1920x620 主图） ---------- */
.hero{min-height:32.3vw}
@media (max-width:720px){.hero{min-height:0}}