/* ============================================================
   数方节能 SUNFANE · 官网设计系统「Light Energy 2」
   浅色 / 全屏轮播首屏 / 横向滚动画廊
   ============================================================ */
:root{
  --white:#ffffff;
  --paper:#f7fbf9;
  --paper2:#eef5f2;
  --ink:#0c1a21;
  --ink2:#3d5665;
  --ink3:#8198a4;
  --line:#e5edf0;
  --line2:#d5e3e6;
  --em:#0f9d6e;
  --em-d:#0a7d57;
  --em-l:#19b981;
  --mint:#e9f7f1;
  --mint2:#f2faf6;
  --sky:#e8f4fb;
  --grad:linear-gradient(115deg,#0f9d6e,#0e8bbf);
  --shadow-s:0 1px 2px rgba(12,40,52,.05);
  --shadow-m:0 10px 30px -10px rgba(12,40,52,.12);
  --shadow-l:0 26px 60px -22px rgba(12,40,52,.22);
  --r-s:10px;--r-m:16px;--r-l:22px;
  --sans:"PingFang SC","Microsoft YaHei UI","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --din:"Bahnschrift","DIN Alternate","Segoe UI",var(--sans);
  --w:1240px;
  --ease:cubic-bezier(.22,.8,.28,1);
  --padl:max(36px,calc((100vw - 1240px) / 2 + 36px));
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px;overflow-x:clip}
body{
  font-family:var(--sans);background:var(--white);color:var(--ink);
  font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:clip;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}
button{font-family:inherit}

/* ---------- 全站统一滚动条（首页 / 内页 / 浮层一致） ---------- */
html{scrollbar-width:thin;scrollbar-color:#c3ded3 #f2f8f5}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#f2f8f5}
::-webkit-scrollbar-thumb{background:#c3ded3;border:2px solid #f2f8f5;border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:var(--em)}
::-webkit-scrollbar-corner{background:#f2f8f5}
::selection{background:rgba(15,157,110,.18)}
:focus-visible{outline:2px solid var(--em);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--w);margin:0 auto;padding:0 36px}
.num{font-family:var(--din);font-variant-numeric:tabular-nums}

/* ============ 预加载（深底，衬托浅色 logo） ============ */
#preloader{
  position:fixed;inset:0;z-index:9999;background:#08181e;
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:16px;
  transition:opacity .55s var(--ease),visibility .55s;
}
#preloader.done{opacity:0;visibility:hidden}
#preloader{animation:pl-auto .5s ease 2.2s forwards}
@keyframes pl-auto{to{opacity:0;visibility:hidden}}
#preloader img{height:22px;width:auto;opacity:.92}
#preloader .pl-txt{font-family:var(--din);font-size:12px;letter-spacing:.4em;color:rgba(255,255,255,.55);padding-left:.4em}
#preloader .pl-bar{width:110px;height:2px;background:rgba(255,255,255,.14);border-radius:2px;overflow:hidden}
#preloader .pl-bar i{display:block;height:100%;width:40%;background:#19b981;border-radius:2px;animation:pl-run 1s var(--ease) infinite}
@keyframes pl-run{0%{transform:translateX(-120%)}100%{transform:translateX(320%)}}

/* ============ 进度条 ============ */
#progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:1200;background:var(--grad)}

/* ============ 导航（首屏透明白字，滚动后变白底） ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1100;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .4s var(--ease),border-color .4s,box-shadow .4s;
}
.nav.scrolled{background:rgba(255,255,255,.9);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom-color:var(--line);box-shadow:0 6px 24px -18px rgba(12,40,52,.4)}
.nav-in{max-width:var(--w);margin:0 auto;padding:0 36px;height:78px;display:flex;align-items:center;gap:38px}
.brand{display:flex;align-items:center;gap:13px;flex:none}
.logo-plate{
  display:flex;align-items:center;justify-content:center;
  background:transparent;border-radius:0;padding:0;
  box-shadow:none;transition:transform .3s var(--ease);
}
.logo-plate img{height:17px;width:auto}
/* 导航 logo 双版本：首屏背景图上用浅色版(logo03)，滚出首屏后切换到深色版(logo1)，不加底色 */
.logo-plate.swap{
  display:grid;place-items:center;background:transparent;box-shadow:none;padding:0;
  transition:transform .3s var(--ease);
}
.logo-plate.swap .lg{grid-area:1/1;height:20px;width:auto;transition:opacity .4s var(--ease)}
.logo-plate.swap .lg-b{opacity:0}
.nav.scrolled .logo-plate.swap .lg-a{opacity:0}
.nav.scrolled .logo-plate.swap .lg-b{opacity:1}
.brand:hover .logo-plate{transform:translateY(-1px)}
/* 字标本身已含「SUNFANE 数方科技」，导航不再重复品牌文字；如需恢复改成 display:flex */
.brand .bt{display:none;flex-direction:column;line-height:1.15}
.brand .bt b{font-size:15px;font-weight:800;letter-spacing:.08em;color:#fff;transition:color .3s}
.brand .bt span{font-family:var(--din);font-size:9.5px;letter-spacing:.26em;color:#5ef0bd;margin-top:3px;transition:color .3s}
.nav.scrolled .brand .bt b{color:var(--ink)}
.nav.scrolled .brand .bt span{color:var(--em-d)}
.nav-links{display:flex;gap:2px;margin-left:auto}
.nav-links>li{position:relative}
.nav-links>li>a{
  display:flex;align-items:center;gap:6px;height:78px;padding:0 16px;
  font-size:15px;letter-spacing:.04em;color:rgba(255,255,255,.88);position:relative;transition:color .3s;
}
.nav.scrolled .nav-links>li>a{color:var(--ink2)}
.nav-links>li>a::after{
  content:"";position:absolute;left:16px;right:16px;bottom:23px;height:2px;border-radius:2px;
  background:var(--em-l);transform:scaleX(0);transform-origin:left;transition:transform .28s var(--ease);
}
.nav-links>li>a:hover,.nav-links>li.on>a{color:#fff}
.nav.scrolled .nav-links>li>a:hover,.nav.scrolled .nav-links>li.on>a{color:var(--ink)}
.nav-links>li>a:hover::after,.nav-links>li.on>a::after{transform:scaleX(1)}
.caret{width:8px;height:8px;fill:none;stroke:currentColor;stroke-width:2;opacity:.55;transition:transform .25s}
.nav-links>li:hover .caret{transform:rotate(180deg)}
.drop{
  position:absolute;top:calc(100% - 10px);left:50%;transform:translate(-50%,8px);
  min-width:180px;padding:10px;background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-l);opacity:0;visibility:hidden;transition:all .26s var(--ease);
}
.nav-links>li:hover .drop{opacity:1;visibility:visible;transform:translate(-50%,0)}
.drop a{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:9px;font-size:14px;color:var(--ink2);transition:all .18s}
.drop a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--em);opacity:0;transition:opacity .18s;flex:none}
.drop a:hover{background:var(--mint);color:var(--em-d)}
.drop a:hover::before{opacity:1}
.nav-tel{
  display:flex;align-items:center;gap:9px;flex:none;font-family:var(--din);font-size:16.5px;
  letter-spacing:.03em;color:#fff;padding:10px 20px;border-radius:999px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);transition:all .3s var(--ease);
}
.nav-tel svg{width:15px;height:15px;stroke:#fff;fill:none;stroke-width:2;transition:stroke .3s}
.nav.scrolled .nav-tel{color:var(--ink);background:var(--mint);border-color:#d3ece1}
.nav.scrolled .nav-tel svg{stroke:var(--em-d)}
.nav-tel:hover{background:rgba(255,255,255,.22)}
.nav.scrolled .nav-tel:hover{background:#ddf3e9;border-color:var(--em)}
.burger{display:none;margin-left:auto;width:44px;height:44px;border:1px solid rgba(255,255,255,.4);border-radius:11px;background:rgba(8,24,30,.38);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);position:relative;cursor:pointer;transition:all .3s}
.burger i{position:absolute;left:12px;right:12px;height:2px;background:#fff;border-radius:2px;transition:all .3s var(--ease)}
.nav.scrolled .burger{background:#fff;border-color:var(--line2)}
.nav.scrolled .burger i{background:var(--ink)}
.burger i:nth-child(1){top:15px}.burger i:nth-child(2){top:21px}.burger i:nth-child(3){top:27px}
.burger.open i:nth-child(1){top:21px;transform:rotate(45deg)}
.burger.open i:nth-child(2){opacity:0}
.burger.open i:nth-child(3){top:21px;transform:rotate(-45deg)}
.m-drawer{
  position:fixed;inset:0;z-index:1050;background:#fff;padding:96px 28px 40px;overflow-y:auto;
  opacity:0;visibility:hidden;transition:all .32s var(--ease);
}
.m-drawer.open{opacity:1;visibility:visible}
/* 抽屉展开时（白底），导航压白底 → 切深色字标并去掉底部分隔线 */
body.drawer-open .nav{background:transparent;border-bottom-color:transparent;box-shadow:none}
body.drawer-open .nav .logo-plate.swap .lg-a{opacity:0}
body.drawer-open .nav .logo-plate.swap .lg-b{opacity:1}
body.drawer-open .nav .burger{background:#fff;border-color:var(--line2)}
body.drawer-open .nav .burger i{background:var(--ink)}
.m-drawer a{display:block;padding:14px 2px;font-size:18px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--line)}
.m-drawer .sub a{font-size:14.5px;font-weight:400;color:var(--ink3);padding:9px 2px 9px 16px;border-bottom:0}

/* ============ HERO · 全屏轮播 ============ */
.hero{position:relative;height:100svh;min-height:620px;max-height:1120px;overflow:hidden;background:#08181e;isolation:isolate}
.hero-slides{position:absolute;inset:0;z-index:0}
.hero-slide{
  position:absolute;inset:0;opacity:0;visibility:hidden;
  background-size:cover;background-position:center bottom;
  transition:opacity 1.5s var(--ease),visibility 1.5s;
  will-change:transform,opacity;
}
.hero-slide.on{opacity:1;visibility:visible;animation:kb 8.5s linear forwards}
@keyframes kb{from{transform:scale(1.02)}to{transform:scale(1.1)}}
.hero-veil{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(90deg,rgba(5,20,26,.88) 0%,rgba(5,20,26,.68) 34%,rgba(5,20,26,.18) 66%,rgba(5,20,26,.38) 100%),
    linear-gradient(180deg,rgba(5,20,26,.52) 0%,rgba(5,20,26,0) 26%,rgba(5,20,26,.16) 62%,rgba(5,20,26,.62) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(ellipse 60% 60% at 78% 40%,#000 8%,transparent 70%);
  -webkit-mask-image:radial-gradient(ellipse 60% 60% at 78% 40%,#000 8%,transparent 70%);
}
.hero-in{
  position:relative;z-index:2;height:100%;max-width:var(--w);margin:0 auto;padding:130px 36px 150px;
  display:flex;align-items:flex-end;
}
.hero-copy{max-width:780px;will-change:transform}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:14px;margin-bottom:28px;
  font-family:var(--din);font-size:12.5px;letter-spacing:.42em;color:rgba(255,255,255,.78);
}
.hero-eyebrow::before{content:"";width:46px;height:1px;background:linear-gradient(90deg,#5ef0bd,rgba(94,240,189,0))}
.hero h1{
  font-size:clamp(42px,5.8vw,84px);font-weight:900;line-height:1.16;letter-spacing:.02em;color:#fff;
  text-shadow:0 30px 70px rgba(0,0,0,.35);margin-bottom:26px;
}
.hero h1 em{
  font-style:normal;position:relative;white-space:nowrap;
  background:linear-gradient(100deg,#7bf3cc 10%,#43d3ec 90%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lede{max-width:560px;font-size:16.5px;color:rgba(255,255,255,.82);text-shadow:0 10px 30px rgba(0,0,0,.3);margin-bottom:42px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;height:56px;padding:0 34px;
  border-radius:14px;font-size:15.5px;letter-spacing:.05em;cursor:pointer;border:0;transition:all .28s var(--ease);
}
.btn .ar{transition:transform .28s var(--ease);display:inline-block}
.btn:hover .ar{transform:translateX(6px)}
.btn-light{background:#fff;color:#07211b;font-weight:800;box-shadow:0 18px 40px -14px rgba(0,0,0,.5)}
.btn-light:hover{background:#eafff7;transform:translateY(-3px)}
.btn-line{border:1px solid rgba(255,255,255,.42);color:#fff;background:rgba(255,255,255,.06);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.btn-line:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-3px)}
.btn-p{background:var(--em);color:#fff;font-weight:700;box-shadow:0 12px 26px -10px rgba(15,157,110,.55)}
.btn-p:hover{background:var(--em-d);transform:translateY(-2px)}
.btn-g{border:1px solid var(--line2);color:var(--ink);background:#fff}
.btn-g:hover{border-color:var(--em);color:var(--em-d);transform:translateY(-2px)}

/* Hero 底部：轮播指示 + 滚动提示 */
.hero-meta{position:absolute;left:0;right:0;bottom:0;z-index:3}
.hero-meta .in{
  max-width:var(--w);margin:0 auto;padding:0 36px 34px;
  display:flex;justify-content:space-between;align-items:flex-end;gap:24px;
}
.hero-dots{display:flex;gap:26px}
.hero-dots button{
  background:none;border:0;cursor:pointer;padding:0;text-align:left;
  display:flex;flex-direction:column;gap:9px;color:rgba(255,255,255,.45);transition:color .3s;
}
.hero-dots button .num{font-size:13px;letter-spacing:.14em;line-height:1}
.hero-dots button i{display:block;height:2px;width:52px;border-radius:2px;background:rgba(255,255,255,.22);position:relative;overflow:hidden;transition:background .3s}
.hero-dots button i::after{content:"";position:absolute;inset:0;background:#fff;transform:scaleX(0);transform-origin:left}
.hero-dots button.on{color:#fff}
.hero-dots button.on i::after{transform:scaleX(1);transition:transform 6.4s linear}
.hero-scroll{display:flex;flex-direction:column;align-items:center;gap:10px;color:rgba(255,255,255,.6);transition:color .3s}
.hero-scroll span{font-size:11.5px;letter-spacing:.3em;writing-mode:vertical-rl}
.hero-scroll i{width:1px;height:44px;background:rgba(255,255,255,.28);position:relative;overflow:hidden}
.hero-scroll i::after{content:"";position:absolute;left:0;top:-40%;width:100%;height:40%;background:#5ef0bd;animation:sc 2s var(--ease) infinite}
@keyframes sc{to{top:110%}}
.hero-scroll:hover{color:#fff}

/* ============ 区块通用 ============ */
.sec{padding:104px 0}
.sec-paper{background:var(--paper)}
.sec-white{background:#fff}
.sec-head{margin-bottom:14px}
.kicker{display:inline-flex;align-items:center;gap:10px;font-family:var(--din);font-size:12.5px;letter-spacing:.28em;color:var(--em-d)}
.kicker::before{content:"";width:32px;height:1.5px;background:var(--em)}
.sec-title{font-size:clamp(28px,3.3vw,42px);font-weight:900;letter-spacing:.03em;line-height:1.26;color:var(--ink)}
.sec-sub{max-width:620px;margin:14px 0 46px;color:var(--ink2);font-size:15.5px}
.sec-top{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:44px}
.sec-top .sec-sub{margin-bottom:0}
.more-link{
  display:inline-flex;align-items:center;gap:9px;flex:none;margin-bottom:6px;
  font-size:14.5px;font-weight:700;color:var(--em-d);white-space:nowrap;
}
.more-link svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;transition:transform .26s var(--ease)}
.more-link:hover svg{transform:translateX(5px)}

/* ============ 横向滚动画廊（sticky pin） ============ */
.hstage{position:relative;--hd:0px;height:calc(100vh + var(--hd));background:#fff}
.hstage-paper{background:linear-gradient(180deg,#f7fbf9 0%,#eef7f3 100%)}
.hstage-pin{
  position:sticky;top:0;height:100vh;min-height:660px;overflow:hidden;
  display:flex;flex-direction:column;justify-content:center;gap:10px;padding:100px 0 36px;
}
.hstage-head{
  width:100%;max-width:var(--w);margin:0 auto;padding:0 36px;
  display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:26px;
}
.hstage-sub{margin-top:14px;color:var(--ink2);font-size:15px;max-width:560px}
.hstage-tools{display:flex;align-items:center;gap:22px;flex:none;padding-bottom:6px}
.hstage-idx{font-size:13px;letter-spacing:.16em;color:var(--ink3);display:flex;align-items:baseline;gap:8px}
.hstage-idx b{font-size:26px;font-weight:600;color:var(--ink);line-height:1}
.hstage-idx span{opacity:.5}
.hstage-idx i{font-style:normal}
.hstage-arrows{display:flex;gap:10px}
.hstage-arrows button{
  width:46px;height:46px;border-radius:50%;border:1px solid var(--line2);background:#fff;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  transition:all .24s var(--ease);box-shadow:var(--shadow-s);
}
.hstage-arrows button svg{width:17px;height:17px;fill:none;stroke:var(--ink);stroke-width:2;transition:stroke .2s}
.hstage-arrows button:hover:not(:disabled){border-color:var(--em);background:var(--mint);transform:translateY(-2px)}
.hstage-arrows button:hover:not(:disabled) svg{stroke:var(--em-d)}
.hstage-arrows button:disabled{opacity:.32;cursor:default}

.hstage-view{width:100%;overflow:hidden;padding:26px 0 30px}
.htrack{
  display:flex;gap:26px;align-items:stretch;
  padding-left:var(--padl);padding-right:36px;
  transform:translate3d(0,0,0);will-change:transform;perspective:1400px;
}

/* 产品卡片 */
.pcard{flex:none;width:clamp(320px,29vw,396px);height:clamp(340px,50vh,500px);position:relative;transform-style:preserve-3d}
.pcard-in{
  width:100%;height:100%;display:flex;flex-direction:column;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;
  transition:transform .4s var(--ease),box-shadow .4s,border-color .4s;
}
.pcard:hover .pcard-in{transform:translateY(-10px);box-shadow:var(--shadow-l);border-color:#bfe6d6}
.pcard-media{
  position:relative;flex:0 0 55%;overflow:hidden;
  background:radial-gradient(120% 130% at 18% 0%,#f4fbf8 0%,#e8f4ef 58%,#dcefe8 100%);
  display:flex;align-items:center;justify-content:center;
}
.pcard-media img{width:100%;height:100%;object-fit:contain;padding:24px 28px;transition:transform .6s var(--ease)}
.pcard:hover .pcard-media img{transform:scale(1.07) translateX(-4px)}
.pcard-no{
  position:absolute;top:16px;left:18px;z-index:2;font-size:12px;letter-spacing:.16em;
  color:var(--em-d);background:rgba(255,255,255,.88);border:1px solid #d9eee6;border-radius:7px;padding:3px 11px;
}
.pcard-media::after{
  content:"";position:absolute;inset:auto -30% -55% -30%;height:75%;
  background:radial-gradient(closest-side,rgba(15,157,110,.14),transparent);
  pointer-events:none;
}
.pcard-body{padding:22px 26px 24px;display:flex;flex-direction:column;flex:1;min-height:0}
.pcard-body h3{font-size:18px;font-weight:800;color:var(--ink);line-height:1.45;margin-bottom:8px}
.pcard-body p{
  font-size:13.5px;color:var(--ink2);line-height:1.7;margin-bottom:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.pcard-tags{display:flex;gap:6px;flex-wrap:wrap}
.pcard-tags span{
  font-family:var(--din);font-size:10.5px;letter-spacing:.08em;color:var(--ink3);
  border:1px solid var(--line);border-radius:5px;padding:3px 9px;background:var(--paper);
}
.pcard-go{margin-top:auto;padding-top:12px;display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:var(--em-d)}
.pcard-go svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;transition:transform .25s var(--ease)}
.pcard:hover .pcard-go svg{transform:translateX(5px)}

/* 解决方案卡片 */
.scard{flex:none;width:clamp(360px,33vw,440px);height:clamp(340px,50vh,500px);position:relative;transform-style:preserve-3d}
.scard-in{
  width:100%;height:100%;position:relative;overflow:hidden;display:flex;flex-direction:column;
  padding:36px 36px 32px;background:linear-gradient(165deg,#ffffff 0%,#f6fbf9 100%);
  border:1px solid var(--line);border-radius:var(--r-l);
  transition:transform .4s var(--ease),box-shadow .4s,border-color .4s;
}
.scard-in::after{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease)}
.scard:hover .scard-in{transform:translateY(-10px);box-shadow:var(--shadow-l);border-color:#bfe6d6}
.scard:hover .scard-in::after{transform:scaleX(1)}
.scard-ghost{
  position:absolute;right:26px;top:12px;font-size:clamp(72px,9vh,104px);font-weight:600;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px #dcebe6;pointer-events:none;transition:all .4s;
}
.scard:hover .scard-ghost{-webkit-text-stroke:1.5px #9fdcc6;transform:translateY(-4px)}
.scard-cat{
  position:relative;font-family:var(--din);font-size:11px;letter-spacing:.16em;color:var(--em-d);
  background:var(--mint);align-self:flex-start;border-radius:6px;padding:4px 13px;margin-bottom:22px;
}
.scard h3{position:relative;font-size:clamp(19px,2.2vh,24px);font-weight:800;line-height:1.4;color:var(--ink);margin-bottom:12px}
.scard p{position:relative;font-size:13.8px;color:var(--ink2);margin-bottom:16px}
.scard ul{position:relative}
.scard li{position:relative;padding:7px 0 7px 20px;font-size:13px;color:var(--ink2);border-top:1px dashed var(--line)}
.scard li::before{content:"";position:absolute;left:2px;top:15px;width:6px;height:6px;border:1.6px solid var(--em);border-radius:2px}
.scard-go{margin-top:auto;position:relative;display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:var(--em-d)}
.scard-go svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;transition:transform .25s var(--ease)}
.scard:hover .scard-go svg{transform:translateX(5px)}

/* 画廊底部 */
.hstage-foot{
  width:100%;max-width:var(--w);margin:0 auto;padding:0 36px;
  display:flex;align-items:center;gap:28px;
}
.hstage-bar{flex:1;height:2px;background:var(--line);border-radius:2px;overflow:hidden}
.hstage-paper .hstage-bar{background:rgba(12,40,52,.1)}
.hstage-bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--em),#2cc5a5);border-radius:2px}
.hstage-hint{display:flex;align-items:center;gap:11px;font-size:12px;letter-spacing:.14em;color:var(--ink3);flex:none}
.hstage-hint .mouse{
  width:19px;height:30px;border:1.6px solid var(--ink3);border-radius:10px;position:relative;display:inline-block;
}
.hstage-hint .mouse::after{
  content:"";position:absolute;left:50%;top:6px;width:3px;height:6px;border-radius:3px;background:var(--em);
  transform:translateX(-50%);animation:wh 1.6s var(--ease) infinite;
}
@keyframes wh{0%{opacity:1;transform:translate(-50%,0)}70%{opacity:0;transform:translate(-50%,9px)}100%{opacity:0}}

/* 激活卡片（JS 标记最近视口中心的卡） */
.pcard.is-act .pcard-in,.scard.is-act .scard-in{border-color:#b7e3d3;box-shadow:0 18px 44px -18px rgba(15,157,110,.28)}

/* ============ 解决方案 · 叠层卡片 ============ */
/* 五张卡片依次吸顶叠放：滚动时下一张从下方推上来盖住上一张，
   被盖住的卡片轻微后退，形成层层堆叠的纵深。 */
.solsec{
  padding:104px 0 132px;
  background:linear-gradient(180deg,#f3faf6 0%,var(--paper) 22%,var(--paper) 78%,#eef7f3 100%);
}
.soldeck{
  --solcard-h:clamp(430px,58vh,540px);
  display:flex;flex-direction:column;gap:22px;
}
.solcard{
  position:sticky;top:calc(50vh - var(--solcard-h) / 2);z-index:1;
  height:var(--solcard-h);overflow:hidden;
  display:grid;grid-template-columns:minmax(0,.94fr) minmax(0,1fr);
  gap:clamp(26px,3.4vw,54px);padding:clamp(24px,2.4vw,38px);
  border:1px solid rgba(12,26,33,.07);border-radius:26px;
  background:linear-gradient(148deg,#ecf6f1 0%,#fff 56%,#f1f8fb 100%);
  box-shadow:0 46px 90px -70px rgba(9,45,36,.55);
  transform:scale(calc(1 - .045 * var(--d,0)));transform-origin:50% 46%;
  will-change:transform;
}
.solcard:nth-child(even){background:linear-gradient(148deg,#e9f2fa 0%,#fff 56%,#eef8f1 100%)}
.solcard:nth-child(1){z-index:1}
.solcard:nth-child(2){z-index:2}
.solcard:nth-child(3){z-index:3}
.solcard:nth-child(4){z-index:4}
.solcard:nth-child(5){z-index:5}

.solcard-fig{
  position:relative;margin:0;min-height:0;border-radius:18px;overflow:hidden;
  background:linear-gradient(160deg,#eaf4ef,#dfeee8);
}
.solcard-fig img{
  width:100%;height:100%;object-fit:cover;display:block;
  transform:scale(1.02);transition:transform 1.1s var(--ease);
}
.solcard:hover .solcard-fig img{transform:scale(1.06)}
.solcard-fig::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(190deg,rgba(6,26,22,0) 48%,rgba(6,26,22,.6) 100%);
}
.solcard-fig figcaption{
  position:absolute;left:20px;bottom:18px;z-index:1;
  font-family:var(--din);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:rgba(255,255,255,.92);
}

.solcard-copy{
  display:flex;flex-direction:column;justify-content:center;min-width:0;
  padding-right:clamp(0px,1vw,14px);
}
.solcard-meta{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.sol-no{
  font-family:var(--din);font-size:12px;font-weight:600;letter-spacing:.14em;line-height:1;
  color:var(--em-d);padding:5px 11px;border:1px solid rgba(15,157,110,.28);border-radius:999px;
}
.sol-cat{
  font-family:var(--din);font-size:11.5px;letter-spacing:.12em;
  color:var(--ink3);margin:0;
}
.solcard h3{
  font-size:clamp(23px,2.5vw,34px);font-weight:900;line-height:1.3;color:var(--ink);
  letter-spacing:.01em;margin-bottom:14px;
}
.solcard p{font-size:15px;line-height:1.92;color:var(--ink2);max-width:46ch}
.sol-list{margin-top:16px;max-width:46ch}
.sol-list li{
  position:relative;padding:8px 0 8px 22px;font-size:13.4px;line-height:1.7;color:var(--ink2);
  border-top:1px dashed var(--line);
}
.sol-list li::before{
  content:"";position:absolute;left:2px;top:16px;width:6px;height:6px;
  border:1.6px solid var(--em);border-radius:2px;
}
.sol-go{
  margin-top:20px;display:inline-flex;align-items:center;gap:9px;align-self:flex-start;
  font-size:13.5px;font-weight:700;color:var(--em-d);
  padding-bottom:6px;border-bottom:1px solid rgba(15,157,110,.32);
  transition:border-color .3s,gap .3s var(--ease);
}
.sol-go svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;transition:transform .3s var(--ease)}
.sol-go:hover{gap:14px;border-color:var(--em)}
.sol-go:hover svg{transform:translateX(2px)}

@media (max-width:1024px){
  /* 小屏取消吸顶堆叠，改为常规竖排卡片 */
  .solsec{padding:84px 0 62px}
  .soldeck{gap:16px}
  .solcard{
    position:static;height:auto;transform:none!important;
    grid-template-columns:minmax(0,1fr);gap:18px;padding:18px;border-radius:22px;
  }
  .solcard-fig{aspect-ratio:16/10;height:auto}
  .solcard-copy{padding:2px 4px 8px}
}
@media (max-width:720px){
  .solcard{padding:14px;border-radius:20px}
  .solcard h3{font-size:21px}
  .solcard p{font-size:14px}
  .solcard .sol-list{margin-top:14px}
  .solcard .sol-go{margin-top:16px}
}
@media (prefers-reduced-motion:reduce){
  .solcard{transform:none}
  .solcard-fig img{transition:none}
}

/* ============ 成功案例 ============ */
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.case{
  position:relative;border-radius:var(--r-m);overflow:hidden;aspect-ratio:4/3;
  border:1px solid var(--line);background:var(--paper);box-shadow:var(--shadow-s);
  transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;
}
.case img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease),filter .5s;filter:saturate(.92)}
.case:hover{transform:translateY(-6px);box-shadow:var(--shadow-l);border-color:#cfe8dd}
.case:hover img{transform:scale(1.07);filter:saturate(1.05)}
.case .cv{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:22px 20px 20px;background:linear-gradient(180deg,rgba(6,20,26,0) 32%,rgba(6,20,26,.82) 88%)}
.case .ct{font-family:var(--din);font-size:10px;letter-spacing:.2em;color:#5ee0b4;margin-bottom:6px}
.case b{font-size:15.5px;font-weight:800;color:#fff;line-height:1.5}
.case p{font-size:12px;color:rgba(255,255,255,.82);line-height:1.7;margin-top:7px;max-height:0;opacity:0;overflow:hidden;transition:all .42s var(--ease)}
.case:hover p{max-height:96px;opacity:1}
.case .go{margin-top:10px;display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;color:#5ee0b4;opacity:0;transform:translateY(6px);transition:all .42s var(--ease) .05s}
.case:hover .go{opacity:1;transform:none}
.case .go svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:2}

/* ============ 资讯 ============ */
.news-tabs{display:flex;gap:8px;margin-bottom:30px;flex-wrap:wrap}
.news-tabs button{padding:9px 22px;border-radius:999px;border:1px solid var(--line2);background:#fff;font-size:14px;color:var(--ink2);cursor:pointer;transition:all .24s var(--ease)}
.news-tabs button:hover{border-color:var(--em);color:var(--em-d)}
.news-tabs button.on{background:var(--em);border-color:var(--em);color:#fff;font-weight:700;box-shadow:0 8px 20px -8px rgba(15,157,110,.6)}
.news-panel{display:none}
.news-panel.on{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;animation:np .45s var(--ease)}
@keyframes np{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.news-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;transition:all .3s var(--ease)}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-m);border-color:#cfe8dd}
.news-card .im{height:150px;overflow:hidden;background:var(--paper)}
.news-card .im img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.news-card:hover .im img{transform:scale(1.05)}
.news-card .tx{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-card time{font-family:var(--din);font-size:11.5px;color:var(--ink3);letter-spacing:.1em;margin-bottom:8px}
.news-card strong{font-size:15px;font-weight:700;color:var(--ink);line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}
.news-card:hover strong{color:var(--em-d)}
.news-card p{font-size:13px;color:var(--ink2);line-height:1.7;margin-top:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ============ 关于 ============ */
.about-grid{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:64px;align-items:start}
.about-body p{color:var(--ink2);margin-bottom:15px;font-size:15px}
.about-body p b{color:var(--ink)}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:30px}
.acard{padding:22px 22px;border-radius:var(--r-m);border:1px solid var(--line);background:#fff;transition:all .3s var(--ease)}
.acard:hover{transform:translateY(-4px);box-shadow:var(--shadow-m);border-color:#cfe8dd}
.acard b{display:block;font-size:15px;font-weight:800;color:var(--ink);margin-bottom:6px;padding-left:14px;position:relative}
.acard b::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:6px;height:6px;border-radius:2px;background:var(--em)}
.acard p{font-size:12.5px;color:var(--ink2);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.contact-card{border:1px solid var(--line);border-radius:var(--r-l);padding:34px 36px;background:linear-gradient(170deg,#fff,#f4faf7);box-shadow:var(--shadow-m)}
.contact-card h3{font-size:19px;font-weight:800;margin-bottom:24px;display:flex;align-items:center;gap:11px;color:var(--ink)}
.contact-card h3 svg{width:21px;height:21px;stroke:var(--em-d);fill:none;stroke-width:2}
.contact-card dl{display:grid;grid-template-columns:60px 1fr;row-gap:16px;column-gap:16px;font-size:14px}
.contact-card dt{color:var(--ink3)}
.contact-card dd{color:var(--ink)}
.contact-card .tel{font-family:var(--din);font-size:18px;font-weight:600;letter-spacing:.03em}
.contact-qr{margin-top:24px;padding-top:22px;border-top:1px dashed var(--line2);display:flex;align-items:center;gap:16px}
.contact-qr img{width:88px;height:88px;border-radius:10px;border:1px solid var(--line)}
.contact-qr span{font-size:12.5px;color:var(--ink2);line-height:1.8}

/* ============ 页脚 ============ */
.footer{background:var(--paper);border-top:1px solid var(--line);padding:64px 0 0}
.f-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr auto;gap:46px;padding-bottom:48px}
.f-brand .logo-plate{display:inline-flex;margin-bottom:16px;background:transparent;padding:0;box-shadow:none;border-radius:0}
.f-brand .logo-plate img{height:20px;width:auto}
.f-brand .bn{font-size:15px;font-weight:800;letter-spacing:.05em;color:var(--ink)}
.f-brand .be{font-family:var(--din);font-size:10px;letter-spacing:.3em;color:var(--em-d);margin-top:4px}
.f-brand p{margin-top:14px;font-size:12.5px;color:var(--ink3);max-width:290px;line-height:1.8}
.f-col h5{font-size:13px;letter-spacing:.14em;color:var(--ink);margin-bottom:16px;font-weight:800}
.f-col a{display:block;padding:5px 0;font-size:13px;color:var(--ink2);transition:all .2s}
.f-col a:hover{color:var(--em-d);padding-left:5px}
.f-qr img{width:104px;height:104px;border-radius:10px;border:1px solid var(--line2);background:#fff}
.f-qr span{display:block;margin-top:10px;font-size:11.5px;color:var(--ink3);text-align:center}
.f-bottom{border-top:1px solid var(--line);padding:22px 0;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--ink3)}
.f-bottom a{color:var(--ink3);transition:color .2s}
.f-bottom a:hover{color:var(--em-d)}
.f-links{display:flex;gap:18px;flex-wrap:wrap;align-items:center}

/* ============ 浮动 ============ */
.dock{position:fixed;right:22px;bottom:26px;z-index:1000;display:flex;flex-direction:column;gap:10px}
.dock a,.dock button{
  width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line2);cursor:pointer;box-shadow:var(--shadow-m);
  position:relative;transition:all .24s var(--ease);
}
.dock img.w{width:23px;height:23px}
.dock svg{width:21px;height:21px;stroke:var(--ink2);fill:none;stroke-width:1.9;transition:stroke .2s}
.dock a:hover,.dock button:hover{border-color:var(--em);transform:translateY(-3px)}
.dock a:hover svg,.dock button:hover svg{stroke:var(--em-d)}
.dock .pop{
  position:absolute;right:62px;top:50%;transform:translateY(-50%) translateX(8px);
  background:var(--ink);color:#fff;border-radius:11px;padding:9px 15px;white-space:nowrap;
  font-family:var(--din);font-size:14px;opacity:0;visibility:hidden;transition:all .24s var(--ease);box-shadow:var(--shadow-l);
}
.dock a:hover .pop{opacity:1;visibility:visible;transform:translateY(-50%)}
.dock .pop.wx{padding:11px;text-align:center;font-family:var(--sans);font-size:11.5px;color:#fff}
.dock .pop.wx img{width:140px;height:140px;border-radius:8px}
.dock #toTop{opacity:0;visibility:hidden;transition:all .3s}
.dock #toTop.show{opacity:1;visibility:visible}

/* 侧边栏目点（过完首屏才出现） */
.dots{position:fixed;left:24px;top:50%;transform:translateY(-50%);z-index:1000;display:flex;flex-direction:column;gap:15px;opacity:0;visibility:hidden;transition:opacity .5s,visibility .5s}
body.past-hero .dots{opacity:1;visibility:visible}
.dots a{position:relative;width:9px;height:9px;display:flex;align-items:center;justify-content:center}
.dots a i{width:6px;height:6px;border-radius:50%;background:#c8d7dd;transition:all .3s var(--ease)}
.dots a.on i{background:var(--em);box-shadow:0 0 0 4px rgba(15,157,110,.15)}
.dots a .tip{
  position:absolute;left:20px;top:50%;transform:translateY(-50%) translateX(-6px);
  font-size:11.5px;letter-spacing:.1em;color:var(--ink);white-space:nowrap;background:#fff;
  border:1px solid var(--line);border-radius:8px;padding:4px 11px;box-shadow:var(--shadow-m);
  opacity:0;visibility:hidden;transition:all .24s var(--ease);
}
.dots a:hover .tip{opacity:1;visibility:visible;transform:translateY(-50%)}

/* ============ 动画 ============ */
.rv{opacity:0;transform:translateY(30px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.rv-l{opacity:0;transform:translateX(-34px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.rv-r{opacity:0;transform:translateX(34px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.rv-s{opacity:0;transform:scale(.95);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.rv.on,.rv-l.on,.rv-r.on,.rv-s.on{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .rv,.rv-l,.rv-r,.rv-s{opacity:1;transform:none}
}
html.no-anim{scroll-behavior:auto!important}
html.no-anim #preloader{display:none}
html.no-anim .rv,html.no-anim .rv-l,html.no-anim .rv-r,html.no-anim .rv-s{opacity:1!important;transform:none!important;transition:none!important}

/* ============ 响应式 ============ */
@media (max-height:820px) and (min-width:1025px){
  .hstage-pin{padding-top:88px}
  .pcard,.scard{height:clamp(320px,54vh,440px)}
  .hero-in{padding-bottom:130px}
  .sol-list li{padding:6px 0 6px 22px}
}
@media (max-width:1200px){
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .news-panel.on{grid-template-columns:1fr 1fr}
}
@media (max-width:1024px){
  .nav-links,.nav-tel{display:none}
  .burger{display:block}
  .dots{display:none}
  .sec-top{flex-direction:column;align-items:flex-start;gap:16px}
  .about-grid{grid-template-columns:1fr;gap:44px}
  .f-grid{grid-template-columns:1fr 1fr;gap:36px}
  /* 移动端：取消 pin，改为原生横向滑动 */
  .hstage{height:auto!important}
  .hstage-pin{position:static;height:auto;min-height:0;padding:84px 0 60px}
  .hstage-head{flex-direction:column;align-items:flex-start;gap:20px}
  .hstage-view{overflow-x:auto;overscroll-behavior-x:contain;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .hstage-view::-webkit-scrollbar{display:none}
  .htrack{transform:none!important;perspective:none;padding-right:26px}
  .pcard,.scard{scroll-snap-align:start;height:auto}
  .pcard{width:78vw}
  .scard{width:82vw}
  .pcard-in,.scard-in{height:auto;min-height:380px;transform:none!important;box-shadow:none}
  .pcard-media{flex:0 0 46%}
  .hstage-foot{display:none}

}
@media (max-width:720px){
  .wrap{padding:0 22px}
  :root{--padl:22px}
  .nav-in{padding:0 22px}
  .logo-plate.swap .lg{height:17px}
  .hero{min-height:560px}
  .hero-in{padding:110px 22px 150px}
  .hero h1{font-size:clamp(32px,9.2vw,44px)}
  .hero-lede{font-size:15px}
  .hero-dots{gap:16px}
  .hero-dots button i{width:36px}
  .hero-scroll{display:none}
  .hero-meta .in{padding:0 22px 28px}
  .sec{padding:72px 0}
  .hstage-pin{padding:72px 0 48px}
  .hstage-head{padding:0 22px}
  .hstage-sub{font-size:14px}
  .hstage-tools{width:100%;justify-content:space-between}
  .hstage-idx b{font-size:22px}
  .case-grid{grid-template-columns:1fr}
  .news-panel.on{grid-template-columns:1fr}
  .about-cards{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr}
  .dock{right:14px;bottom:16px}
  .dock a[href^="mailto"],.dock a[aria-label="微信公众号"]{display:none}
  .btn{height:52px;padding:0 26px;font-size:15px}
  .scard-in{padding:28px 24px;min-height:340px}
  .scard-ghost{font-size:64px}
}