/* ============================================================
   SPV 伺服夹管阀 · 产品官网
   设计调性：工业装备感 + 精密科技感
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root{
  --graphite:      #2B2F36;
  --graphite-900:  #1A1D22;
  --graphite-700:  #3C424B;
  --blue:          #1A5FB4;
  --blue-deep:     #123E7C;
  --blue-pale:     #DCE6F1;
  --teal:          #00A9A5;
  --teal-soft:     #E6F6F5;
  --orange:        #F5821F;

  --ink:           #2B2F36;
  --ink-2:         #5A6472;
  --ink-3:         #8A95A3;
  --line:          #E3E7EC;
  --line-dark:     rgba(255,255,255,.12);
  --paper:         #FFFFFF;
  --paper-2:       #F5F6F7;
  --paper-3:       #FAFBFC;

  --radius:        10px;
  --radius-lg:     16px;
  --shadow-sm:     0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.08);
  --shadow-md:     0 4px 12px rgba(16,24,40,.07), 0 2px 4px rgba(16,24,40,.04);
  --shadow-lg:     0 18px 40px rgba(16,24,40,.12);
  --shadow-blue:   0 12px 28px rgba(26,95,180,.22);

  --maxw:          1200px;
  --nav-h:         68px;

  --font: "HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC",
          "Microsoft YaHei","Segoe UI",-apple-system,BlinkMacSystemFont,Helvetica,Arial,sans-serif;
  --mono: "JetBrains Mono","SF Mono",Consolas,"Courier New",monospace;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth; scroll-padding-top:calc(var(--nav-h) + 12px); -webkit-text-size-adjust:100%;}
body{
  margin:0; font-family:var(--font); color:var(--ink); background:var(--paper);
  line-height:1.7; font-size:16px; letter-spacing:.2px;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
img,svg{display:block; max-width:100%;}
a{color:inherit; text-decoration:none;}
button{font:inherit; color:inherit; border:0; background:none; cursor:pointer;}
table{border-collapse:collapse; width:100%;}
h1,h2,h3,h4{margin:0; font-weight:700; line-height:1.25; letter-spacing:-.2px;}
p{margin:0;}
ul{margin:0; padding:0; list-style:none;}

/* ---------- Layout ---------- */
.wrap{width:100%; max-width:var(--maxw); margin:0 auto; padding:0 28px;}
.section{padding:96px 0;}
.section--alt{background:var(--paper-2);}
.section--dark{background:var(--graphite-900); color:#fff;}

/* ---------- Section header ---------- */
.sec-head{max-width:760px; margin-bottom:52px;}
.sec-head--center{margin-left:auto; margin-right:auto; text-align:center;}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:12px; font-weight:700; letter-spacing:1.6px; text-transform:uppercase;
  color:var(--blue); margin-bottom:14px;
}
.eyebrow::before{content:""; width:22px; height:2px; background:var(--teal); border-radius:2px;}
.section--dark .eyebrow{color:var(--teal);}
.sec-title{font-size:clamp(26px,3.4vw,38px); color:var(--ink);}
.section--dark .sec-title{color:#fff;}
.sec-sub{margin-top:14px; font-size:17px; color:var(--ink-2);}
.section--dark .sec-sub{color:rgba(255,255,255,.66);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  height:48px; padding:0 26px; border-radius:var(--radius);
  font-size:15px; font-weight:600; white-space:nowrap;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.btn svg{width:17px; height:17px;}
.btn--primary{background:var(--blue); color:#fff; box-shadow:var(--shadow-blue);}
.btn--primary:hover{background:var(--blue-deep); transform:translateY(-2px);}
.btn--ghost{background:rgba(255,255,255,.06); color:#fff; border:1px solid rgba(255,255,255,.28);}
.btn--ghost:hover{background:rgba(255,255,255,.13); border-color:rgba(255,255,255,.5); transform:translateY(-2px);}
.btn--outline{background:#fff; color:var(--ink); border:1px solid var(--line);}
.btn--outline:hover{border-color:var(--blue); color:var(--blue); transform:translateY(-2px);}
.btn--teal{background:var(--teal); color:#fff;}
.btn--teal:hover{background:#008f8c; transform:translateY(-2px);}

/* ============================================================
   Nav
   ============================================================ */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:100; height:var(--nav-h);
  display:flex; align-items:center;
  background:rgba(26,29,34,0); border-bottom:1px solid transparent;
  transition:background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
}
.nav.is-solid{
  background:rgba(26,29,34,.92); backdrop-filter:blur(14px);
  border-bottom-color:var(--line-dark);
}
.nav__inner{display:flex; align-items:center; gap:28px; width:100%; max-width:var(--maxw); margin:0 auto; padding:0 28px;}
.nav__logo{display:flex; align-items:center; flex-shrink:0;}
.nav__logo img{height:40px; width:auto;}
.nav__menu{display:flex; align-items:center; gap:26px; margin-left:auto;}
.nav__menu a{
  font-size:14.5px; color:rgba(255,255,255,.78); position:relative; padding:6px 0;
  transition:color .18s ease;
}
.nav__menu a::after{
  content:""; position:absolute; left:0; bottom:0; height:2px; width:0;
  background:var(--teal); border-radius:2px; transition:width .22s ease;
}
.nav__menu a:hover{color:#fff;}
.nav__menu a:hover::after{width:100%;}

/* 官方商城：常驻菜单项，外链；样式与「获取选型方案」按钮（teal 实心）保持一致 */
.nav__shop{
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  height:38px; padding:0 24px; border-radius:var(--radius);
  background:var(--teal); color:#fff !important; font-weight:700; font-size:14px;
  transition:background .18s ease, transform .18s ease;
}
.nav__shop::after{display:none;}          /* 不走普通菜单项的下划线动效 */
.nav__shop svg{width:13px; height:13px; stroke:#fff; opacity:.9;}
.nav__shop:hover{background:#008f8c; transform:translateY(-2px);}
.nav__cta{height:38px; padding:0 18px; font-size:14px;}
.nav__burger{display:none; margin-left:auto; width:40px; height:40px; align-items:center; justify-content:center;}
.nav__burger i{display:block; width:22px; height:2px; background:#fff; position:relative;}
.nav__burger i::before,.nav__burger i::after{
  content:""; position:absolute; left:0; width:22px; height:2px; background:#fff;
}
.nav__burger i::before{top:-7px;} .nav__burger i::after{top:7px;}

/* ============================================================
   Hero
   ============================================================ */
.hero{
  position:relative; min-height:100vh; display:flex; flex-direction:column;
  justify-content:center;
  background:
    radial-gradient(1100px 620px at 78% 22%, rgba(0,169,165,.20), transparent 62%),
    linear-gradient(155deg, #1A1D22 0%, #20252C 46%, #182B45 100%);
  overflow:hidden; color:#fff;
}
.hero__grid{
  position:absolute; inset:0;
  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:56px 56px;
  mask-image:radial-gradient(circle at 70% 40%, #000 20%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 70% 40%, #000 20%, transparent 78%);
}
.hero__glow{
  position:absolute; width:520px; height:520px; right:-90px; top:-90px; border-radius:50%;
  background:radial-gradient(circle, rgba(0,169,165,.30), transparent 66%); filter:blur(28px);
}
.hero__inner{
  position:relative; z-index:2; flex:1 0 auto;
  width:100%; max-width:var(--maxw); margin:0 auto;
  padding:118px 28px 68px; display:grid; grid-template-columns:1.02fr 1fr; gap:56px; align-items:center;
}
.hero__badge{
  display:inline-flex; align-items:center; gap:9px; height:32px; padding:0 14px;
  border:1px solid rgba(0,169,165,.45); border-radius:100px; background:rgba(0,169,165,.10);
  font-size:12.5px; font-weight:600; letter-spacing:.6px; color:#7FE3E0; margin-bottom:24px;
}
.hero__badge b{width:6px; height:6px; border-radius:50%; background:var(--teal); box-shadow:0 0 0 4px rgba(0,169,165,.22);}
.hero h1{font-size:clamp(34px,4.8vw,58px); line-height:1.12; letter-spacing:-1px;}
.hero h1 em{font-style:normal; color:var(--teal);}
.hero h1 small{
  display:block; margin-top:12px; font-size:clamp(13px,1.4vw,16px); font-weight:600;
  letter-spacing:3.4px; color:rgba(255,255,255,.5); text-transform:uppercase;
}
.hero__lede{margin-top:24px; max-width:560px; font-size:16.5px; color:rgba(255,255,255,.74);}
.hero__lede strong{color:#fff; font-weight:600;}
.hero__actions{margin-top:34px; display:flex; gap:14px; flex-wrap:wrap;}
.hero__stats{
  margin-top:52px; display:grid; grid-template-columns:repeat(3,1fr); gap:18px;
  padding-top:28px; border-top:1px solid var(--line-dark); max-width:560px;
}
.stat__v{font-size:26px; font-weight:700; color:#fff; letter-spacing:-.5px;}
.stat__v span{font-size:14px; font-weight:600; color:var(--teal); margin-left:3px;}
.stat__k{font-size:12.5px; color:rgba(255,255,255,.55); margin-top:2px;}

.hero__visual{position:relative; display:flex; align-items:center; justify-content:center;}
.hero__ring{
  position:absolute; width:min(560px,46vw); aspect-ratio:1; border-radius:50%;
  border:1px dashed rgba(255,255,255,.16);
}
.hero__ring--2{width:min(720px,58vw); border-style:solid; border-color:rgba(255,255,255,.07);}
.hero__shot{
  position:relative; width:118%; max-width:none; filter:drop-shadow(0 30px 60px rgba(0,0,0,.55));
  animation:float 7s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0);}50%{transform:translateY(-14px);}}
.hero__tag{
  position:absolute; z-index:3; display:flex; align-items:center; gap:8px;
  padding:9px 14px; border-radius:100px; font-size:12.5px; font-weight:600;
  background:rgba(255,255,255,.09); border:1px solid rgba(255,255,255,.20);
  backdrop-filter:blur(10px); color:#fff; white-space:nowrap;
}
.hero__tag i{width:7px; height:7px; border-radius:50%; background:var(--teal);}
.hero__tag--a{top:-6%; left:4%;}
.hero__tag--b{bottom:-4%; left:14%;}
.hero__tag--c{top:48%; right:-6%;}

/* marquee strip */
.strip{border-top:1px solid var(--line-dark); background:rgba(0,0,0,.28); position:relative; z-index:2;}
.strip__inner{
  max-width:var(--maxw); margin:0 auto; padding:0 28px; height:76px;
  display:grid; grid-template-columns:repeat(4,1fr); align-items:center; gap:16px;
  color:rgba(255,255,255,.82); font-size:14px; font-weight:600;
}
.strip__inner>div{display:flex; align-items:center; gap:10px; white-space:nowrap;}
.strip__inner svg{width:22px; height:22px; color:var(--teal); flex-shrink:0;}

/* ============================================================
   Feature grid (9 cards)
   ============================================================ */
.cards{display:grid; grid-template-columns:repeat(3,1fr); gap:22px;}
.card{
  position:relative; padding:30px 28px 32px; background:#fff;
  border:1px solid var(--line); border-radius:var(--radius-lg);
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card:hover{transform:translateY(-5px); box-shadow:var(--shadow-lg); border-color:#CBD5E1;}
.card__ico{
  width:50px; height:50px; border-radius:12px; display:grid; place-items:center;
  background:var(--blue-pale); color:var(--blue); margin-bottom:20px;
}
.card__ico svg{width:26px; height:26px;}
.card--hl .card__ico{background:var(--teal-soft); color:var(--teal);}
.card--hl{border-color:rgba(0,169,165,.35); background:linear-gradient(180deg,#FCFFFE,#fff);}
.card__no{
  position:absolute; top:22px; right:24px; font-family:var(--mono);
  font-size:12px; color:var(--ink-3); letter-spacing:1px;
}
.card h3{font-size:18.5px; margin-bottom:10px;}
.card p{font-size:14.5px; color:var(--ink-2);}
.card__gain{
  margin-top:16px; padding-top:14px; border-top:1px dashed var(--line);
  font-size:13.5px; color:var(--blue); font-weight:600; display:flex; gap:8px;
}
.card__gain svg{width:15px; height:15px; flex-shrink:0; margin-top:4px;}

/* ============================================================
   Compatibility
   ============================================================ */
.compat{
  display:grid; grid-template-columns:1fr 1.05fr; gap:52px; align-items:center;
  padding:44px; background:#fff; border:1px solid var(--line); border-radius:20px;
  box-shadow:var(--shadow-md);
}
.rings{position:relative; display:grid; place-items:center; min-height:400px;}
.rings svg{width:100%; max-width:400px; height:auto;}
.rings__note{position:absolute; bottom:4px; font-size:12px; color:var(--ink-3);}

.compat__pick{display:flex; flex-wrap:wrap; gap:9px; margin-bottom:26px;}
.pick{
  padding:9px 15px; border:1px solid var(--line); border-radius:100px; background:#fff;
  font-size:13.5px; font-weight:600; font-family:var(--mono); color:var(--ink-2);
  transition:all .18s ease;
}
.pick:hover{border-color:var(--blue); color:var(--blue);}
.pick.is-on{background:var(--blue); border-color:var(--blue); color:#fff;}

.compat__lede{font-size:26px; font-weight:700; line-height:1.34; margin-bottom:8px;}
.compat__lede em{font-style:normal; color:var(--blue);}
.compat__desc{font-size:15px; color:var(--ink-2); margin-bottom:26px;}

.tubes{display:flex; flex-wrap:wrap; gap:12px;}
.tube{
  position:relative; width:86px; padding:16px 0 12px; text-align:center;
  border:1.5px solid var(--line); border-radius:14px; background:var(--paper-3);
  transition:all .28s ease;
}
.tube__d{
  width:46px; height:46px; margin:0 auto 9px; border-radius:50%;
  border:2.5px solid var(--ink-3); background:#fff;
  display:grid; place-items:center; font-size:12px; font-weight:700; color:var(--ink-3);
  transition:all .28s ease;
}
.tube__t{font-size:13.5px; font-weight:700; color:var(--ink-3); font-family:var(--mono);}
.tube__s{font-size:11px; color:var(--ink-3); margin-top:2px;}
.tube.is-on{
  background:var(--teal-soft); border-color:var(--teal); transform:translateY(-4px);
  box-shadow:0 10px 20px rgba(0,169,165,.16);
}
.tube.is-on .tube__d{border-color:var(--teal); color:var(--teal); background:#fff;}
.tube.is-on .tube__t{color:var(--teal);}
.tube.is-on::after{
  content:"✓"; position:absolute; top:-9px; right:-7px; width:21px; height:21px; border-radius:50%;
  background:var(--teal); color:#fff; font-size:12px; display:grid; place-items:center;
  box-shadow:0 2px 6px rgba(0,169,165,.4);
}
.compat__foot{
  margin-top:26px; padding-top:20px; border-top:1px solid var(--line);
  display:grid; grid-template-columns:repeat(3,1fr); gap:16px;
}
.compat__foot b{display:block; font-size:20px; color:var(--blue);}
.compat__foot span{font-size:12.5px; color:var(--ink-2);}

/* ============================================================
   Principle (介质只接触软管)
   ============================================================ */
.principle{display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center;}
.principle__fig{
  padding:36px; background:var(--paper-2); border:1px solid var(--line); border-radius:18px;
}
.principle__fig svg{width:100%; height:auto;}
.fig-photos{
  display:grid; grid-template-columns:1fr 1fr; gap:14px;
  margin-top:22px; padding-top:22px; border-top:1px solid var(--line);
}
.fig-photos figure{margin:0;}
.fig-photos img{
  width:100%; background:#fff; border:1px solid var(--line);
  border-radius:10px; padding:12px;
}
.fig-photos figcaption{font-size:12px; color:var(--ink-3); text-align:center; margin-top:8px;}
.principle__list li{
  display:flex; gap:14px; padding:16px 0; border-bottom:1px solid var(--line);
}
.principle__list li:last-child{border-bottom:0;}
.principle__list b{
  flex-shrink:0; width:26px; height:26px; border-radius:50%; background:var(--teal); color:#fff;
  display:grid; place-items:center; font-size:13px; margin-top:2px;
}
.principle__list h4{font-size:16px; margin-bottom:3px;}
.principle__list p{font-size:14px; color:var(--ink-2);}

/* ============================================================
   Drawings
   ============================================================ */
.dwg{display:grid; grid-template-columns:250px 1fr; gap:28px; align-items:start;}
.dwg__list{display:flex; flex-direction:column; gap:8px;}
.dwg__tab{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  padding:13px 16px; border:1px solid var(--line); border-radius:var(--radius);
  background:#fff; font-family:var(--mono); font-size:13.5px; font-weight:600; color:var(--ink-2);
  transition:all .18s ease; text-align:left;
}
.dwg__tab small{font-family:var(--font); font-size:12px; font-weight:500; color:var(--ink-3);}
.dwg__tab:hover{border-color:var(--blue); color:var(--blue);}
.dwg__tab.is-on{background:var(--graphite); border-color:var(--graphite); color:#fff;}
.dwg__tab.is-on small{color:rgba(255,255,255,.6);}
.dwg__stage{
  background:#fff; border:1px solid var(--line); border-radius:var(--radius-lg);
  padding:26px 26px 22px; box-shadow:var(--shadow-sm);
}
.dwg__bar{
  display:flex; align-items:baseline; justify-content:space-between; gap:16px;
  padding-bottom:16px; margin-bottom:18px; border-bottom:1px solid var(--line); flex-wrap:wrap;
}
.dwg__bar h3{font-family:var(--mono); font-size:19px;}
.dwg__bar p{font-size:13.5px; color:var(--ink-2);}
.dwg__canvas{
  background:var(--paper-2); border:1px solid var(--line); border-radius:var(--radius);
  padding:22px; display:grid; place-items:center; min-height:280px;
}
.dwg__canvas img{width:100%; height:auto;}
.dwg__spec{
  margin-top:18px; display:grid; grid-template-columns:repeat(4,1fr); gap:12px;
}
.dwg__spec div{padding:12px 14px; background:var(--paper-3); border:1px solid var(--line); border-radius:var(--radius);}
.dwg__spec span{display:block; font-size:11.5px; color:var(--ink-3); margin-bottom:3px;}
.dwg__spec b{font-size:15px; color:var(--ink);}

/* ============================================================
   Spec table
   ============================================================ */
.spec__scroll{overflow-x:auto; border:1px solid var(--line); border-radius:var(--radius-lg); background:#fff; box-shadow:var(--shadow-sm);}
table.spec{min-width:940px; font-size:14.5px;}
table.spec thead th{
  background:var(--graphite); color:#fff; font-weight:600; font-size:13px;
  padding:15px 16px; text-align:left; white-space:nowrap; letter-spacing:.4px;
}
table.spec thead tr:first-child th{border-top-left-radius:var(--radius-lg);}
table.spec thead tr:first-child th:last-child{border-top-right-radius:var(--radius-lg);}
table.spec tbody td{padding:14px 16px; border-top:1px solid var(--line); white-space:nowrap;}
table.spec tbody tr:hover{background:var(--blue-pale);}
table.spec td.mono{font-family:var(--mono); font-weight:600; font-size:13.5px;}
table.spec td.num{font-family:var(--mono);}
.naming{
  margin-top:26px; padding:22px 26px; background:var(--paper-3);
  border:1px dashed var(--line); border-radius:var(--radius);
}
.naming h4{font-size:15px; margin-bottom:10px;}
.naming code{
  display:inline-block; font-family:var(--mono); font-size:15px; background:#fff;
  border:1px solid var(--line); border-radius:6px; padding:3px 10px; color:var(--blue);
}
.naming p{font-size:13.5px; color:var(--ink-2); margin-top:10px;}

.spec__grid{margin-top:42px; display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--radius-lg); overflow:hidden;}
.spec__grid div{background:#fff; padding:18px 22px;}
.spec__grid span{display:block; font-size:12.5px; color:var(--ink-3); margin-bottom:4px;}
.spec__grid b{font-size:15.5px; font-weight:600;}

/* ============================================================
   Applications
   ============================================================ */
.apps{display:grid; grid-template-columns:repeat(5,1fr); gap:18px;}
.app{
  position:relative; padding:28px 24px 26px; border-radius:var(--radius-lg);
  background:linear-gradient(165deg,#22262D,#2B2F36); color:#fff; overflow:hidden;
  transition:transform .22s ease, box-shadow .22s ease;
}
.app:hover{transform:translateY(-6px); box-shadow:var(--shadow-lg);}
.app::after{
  content:""; position:absolute; right:-40px; bottom:-40px; width:130px; height:130px; border-radius:50%;
  background:radial-gradient(circle, rgba(0,169,165,.28), transparent 68%);
}
.app__ico{width:44px; height:44px; border-radius:11px; display:grid; place-items:center; background:rgba(255,255,255,.09); margin-bottom:18px;}
.app__ico svg{width:23px; height:23px; color:var(--teal);}
.app h3{font-size:17px; margin-bottom:9px;}
.app__pain{font-size:13px; color:rgba(255,255,255,.5); margin-bottom:12px;}
.app__fix{font-size:13.5px; color:#7FE3E0; font-weight:600; position:relative; z-index:2;}

/* ============================================================
   FAQ
   ============================================================ */
.faq{max-width:900px; margin:0 auto;}
.qa{border:1px solid var(--line); border-radius:var(--radius); background:#fff; margin-bottom:12px; overflow:hidden; transition:border-color .2s ease, box-shadow .2s ease;}
.qa.is-open{border-color:var(--blue); box-shadow:var(--shadow-md);}
.qa__q{
  width:100%; display:flex; align-items:center; gap:16px; padding:19px 22px;
  font-size:15.5px; font-weight:600; text-align:left;
}
.qa__q span{flex:1;}
.qa__q i{
  flex-shrink:0; width:24px; height:24px; border-radius:50%; background:var(--blue-pale); color:var(--blue);
  display:grid; place-items:center; font-style:normal; font-size:15px; transition:transform .25s ease;
}
.qa.is-open .qa__q i{transform:rotate(45deg); background:var(--blue); color:#fff;}
.qa__a{max-height:0; overflow:hidden; transition:max-height .32s ease;}
.qa__a div{padding:0 22px 20px 22px; font-size:14.5px; color:var(--ink-2);}

/* ============================================================
   CTA
   ============================================================ */
.cta{
  position:relative; overflow:hidden;
  background:linear-gradient(120deg, var(--blue-deep), var(--blue) 62%, #0F8E8B);
  border-radius:22px; padding:60px 56px; color:#fff;
}
.cta::before{
  content:""; position:absolute; right:-120px; top:-120px; width:420px; height:420px; border-radius:50%;
  background:radial-gradient(circle, rgba(255,255,255,.16), transparent 66%);
}
.cta__grid{position:relative; display:grid; grid-template-columns:1.2fr 1fr; gap:44px; align-items:center;}
.cta h2{font-size:clamp(24px,3vw,34px);}
.cta p{margin-top:14px; color:rgba(255,255,255,.82); font-size:16px;}
.cta__acts{margin-top:28px; display:flex; gap:14px; flex-wrap:wrap;}
.cta__info{display:grid; gap:12px;}
.cta__info a,.cta__info div{
  display:flex; align-items:center; gap:11px; font-size:14.5px; color:rgba(255,255,255,.88);
}
.cta__info svg{width:17px; height:17px; color:rgba(255,255,255,.6); flex-shrink:0;}
.cta__info a:hover{color:#fff; text-decoration:underline;}

/* 小程序码卡片（白底，置于蓝色渐变 CTA 上最醒目） */
.cta__info .cta__qr{
  display:flex; align-items:center; gap:16px; margin-top:10px;
  padding:14px 20px 14px 14px; background:#fff; border-radius:14px;
  box-shadow:0 12px 28px rgba(6,26,56,.26);
}
.cta__info .cta__qr img{width:100px; height:100px; flex-shrink:0; border-radius:8px;}
.cta__info .cta__qr-txt{display:flex; flex-direction:column; align-items:flex-start; gap:4px;}
.cta__info .cta__qr-txt b{font-size:14.5px; font-weight:700; color:var(--blue-deep); line-height:1.3;}
.cta__info .cta__qr-txt span{font-size:12.5px; color:var(--ink-2); line-height:1.35;}
.cta__info .cta__qr-txt .cta__qr-hint{font-size:11.5px; color:var(--ink-3);}

/* ============================================================
   Footer
   ============================================================ */
.footer{background:var(--graphite-900); color:rgba(255,255,255,.6); padding:56px 0 34px; font-size:14px;}
.footer__grid{display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px; padding-bottom:34px; border-bottom:1px solid var(--line-dark);}
.footer__logo img{height:38px; width:auto; margin-bottom:18px;}
.footer h4{color:#fff; font-size:14.5px; margin-bottom:16px; letter-spacing:.5px;}
.footer li{padding:5px 0;}
.footer a:hover{color:#fff;}
.footer__bot{padding-top:24px; display:flex; justify-content:space-between; gap:18px; flex-wrap:wrap; font-size:13px; color:rgba(255,255,255,.42);}

/* ---------- Reveal ---------- */
.reveal{opacity:0; transform:translateY(22px); transition:opacity .6s ease, transform .6s ease;}
.reveal.is-in{opacity:1; transform:none;}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:1080px){
  /* 菜单变 8 项，压缩导航给菜单腾空间 */
  .nav__inner{gap:18px;}
  .nav__menu{gap:15px;}
  .nav__menu a{font-size:13.5px;}
  .nav__logo img{height:32px;}
  .nav__shop{padding:0 18px; font-size:13px;}
  .nav__cta{display:none;}
  .cards{grid-template-columns:repeat(2,1fr);}
  .apps{grid-template-columns:repeat(3,1fr);}
  .hero__inner{grid-template-columns:1fr; gap:40px; padding-top:110px;}
  .hero{min-height:auto;}
  .hero__visual{order:-1;}
  .hero__shot{width:100%; max-width:560px; margin:0 auto;}
  .hero__ring{display:none;}
  .compat{grid-template-columns:1fr; gap:32px; padding:32px;}
  .principle{grid-template-columns:1fr; gap:32px;}
  .dwg{grid-template-columns:1fr;}
  .dwg__list{flex-direction:row; flex-wrap:wrap;}
  .spec__grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .nav__menu{display:none;}
  .nav__burger{display:flex;}
  .nav__cta{display:none;}
  .nav__shop{align-self:flex-start;}   /* 展开菜单为纵向排列，商城项不拉满 */
  .strip__inner{grid-template-columns:repeat(2,1fr); height:auto; padding:18px 28px; gap:14px;}
  .apps{grid-template-columns:repeat(2,1fr);}
  .cta{padding:40px 28px;}
  .cta__grid{grid-template-columns:1fr; gap:30px;}
  .footer__grid{grid-template-columns:1fr; gap:28px;}
  .dwg__spec{grid-template-columns:repeat(2,1fr);}
  .section{padding:68px 0;}
}
@media (max-width:620px){
  .cta__info .cta__qr{padding:12px 16px 12px 12px; gap:13px;}
  .cta__info .cta__qr img{width:88px; height:88px;}
  .cards{grid-template-columns:1fr;}
  .apps{grid-template-columns:1fr;}
  .hero__stats{grid-template-columns:1fr; gap:14px;}
  .hero__tag{display:none;}
  .spec__grid{grid-template-columns:1fr;}
  .compat__foot{grid-template-columns:1fr;}
  .tube{width:74px;}
  .compat{padding:22px;}
  .principle__fig{padding:20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important; transition:none !important; scroll-behavior:auto !important;}
  .reveal{opacity:1; transform:none;}
}