/* ===== 变量与基础（ZIZO 品牌橙红主题） ===== */
:root{
  --brand:#e8402a;
  --brand-d:#bf2f1d;
  --brand-l:#ff6a4d;
  --accent:#ff9d3c;
  --navy:#201a16;
  --ink:#23201e;
  --muted:#7a7068;
  --line:#ece7e3;
  --bg:#ffffff;
  --bg-soft:#faf6f3;
  --radius:1rem;
  --shadow:0 1.125rem 2.5rem -1.125rem rgba(80,30,15,.30);
  --shadow-sm:0 0.5rem 1.5rem -0.75rem rgba(80,30,15,.22);
  --maxw:75rem;
  --t:.3s cubic-bezier(.4,0,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:clamp(15px,calc(0.8vw + 9px),26px)}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body.lightbox-open{overflow:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 1.5rem}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:0.5rem;
  padding:0.6875rem 1.375rem;border-radius:62.4375rem;font-weight:600;font-size:0.9375rem;
  cursor:pointer;border:0.0625rem solid transparent;transition:var(--t);white-space:nowrap;
}
.btn-lg{padding:0.875rem 1.875rem;font-size:1rem}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-l));color:#fff;box-shadow:0 0.625rem 1.5rem -0.625rem rgba(232,64,42,.7)}
.btn-primary:hover{transform:translateY(-0.125rem);box-shadow:0 1rem 1.875rem -0.625rem rgba(232,64,42,.8)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.16);transform:translateY(-0.125rem)}
.btn-outline{background:#fff;color:var(--brand-d);border-color:rgba(232,64,42,.32);box-shadow:none}
.btn-outline:hover{background:var(--bg-soft);border-color:rgba(232,64,42,.5);transform:translateY(-0.125rem)}

/* ===== 导航 ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:50;transition:var(--t)}
.site-header.scrolled{background:rgba(255,255,255,.94);backdrop-filter:blur(0.75rem);box-shadow:0 0.25rem 1.25rem -0.75rem rgba(80,30,15,.4)}
.nav-inner{display:flex;align-items:center;gap:1.5rem;height:4.5rem}
.brand{display:flex;align-items:center;gap:0.875rem;color:#fff;transition:var(--t)}
.site-header.scrolled .brand{color:var(--ink)}
.brand-logo{
  height:2.5rem;width:auto;display:block;flex:none;
  background:transparent;border:0;box-shadow:none;border-radius:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:1.125rem}
.brand-text small{font-size:0.625rem;letter-spacing:0.09375rem;opacity:.7}
.main-nav{display:flex;gap:0.375rem;margin-left:auto}
.main-nav a{color:rgba(255,255,255,.92);font-weight:500;font-size:0.9375rem;padding:0.5rem 0.875rem;border-radius:0.5rem;transition:var(--t)}
.site-header.scrolled .main-nav a{color:var(--ink)}
.main-nav a:hover{color:var(--brand)}
.site-header.scrolled .main-nav a:hover{background:var(--bg-soft)}
.nav-cta{margin-left:0.25rem}
.lang-switch{
  display:inline-flex;align-items:center;gap:0.125rem;padding:0.1875rem;
  border-radius:62.4375rem;background:rgba(255,255,255,.12);border:0.0625rem solid rgba(255,255,255,.28);
  flex:none;
}
.site-header.scrolled .lang-switch{background:var(--bg-soft);border-color:var(--line)}
.lang-btn{
  min-width:2.125rem;padding:0.3125rem 0.625rem;border:0;border-radius:62.4375rem;
  background:transparent;color:rgba(255,255,255,.88);font-size:0.8125rem;font-weight:600;
  cursor:pointer;transition:var(--t);line-height:1.2;font-family:inherit;
}
.site-header.scrolled .lang-btn{color:var(--muted)}
.lang-btn.active{background:var(--brand);color:#fff;box-shadow:0 0.25rem 0.75rem -0.25rem rgba(232,64,42,.55)}
.site-header.scrolled .lang-btn.active{color:#fff}
.lang-btn:hover:not(.active){color:var(--brand-l)}
.site-header.scrolled .lang-btn:hover:not(.active){color:var(--brand)}
.nav-toggle{display:none;flex-direction:column;gap:0.3125rem;background:none;border:0;cursor:pointer;padding:0.5rem}
.nav-toggle span{width:1.625rem;height:0.125rem;background:#fff;border-radius:0.125rem;transition:var(--t)}
.site-header.scrolled .nav-toggle span{background:var(--ink)}

/* ===== Hero ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{
  position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(68.75rem 37.5rem at 82% -10%,rgba(255,157,60,.34),transparent 60%),
    radial-gradient(56.25rem 37.5rem at 0% 100%,rgba(232,64,42,.5),transparent 55%),
    linear-gradient(135deg,#1a1310 0%,#2a1410 55%,#3c1a12 100%);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 0.0625rem,transparent 0.0625rem),linear-gradient(90deg,rgba(255,255,255,.05) 0.0625rem,transparent 0.0625rem);
  background-size:3.375rem 3.375rem;mask-image:radial-gradient(circle at 50% 40%,#000,transparent 75%);
}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:2.5rem;align-items:center;padding-top:5.625rem;padding-bottom:3.75rem}
.hero-eyebrow{display:inline-block;font-size:0.875rem;letter-spacing:0.1875rem;color:var(--accent);font-weight:600;margin-bottom:1.125rem;text-transform:uppercase}
.hero-title{font-size:2.875rem;line-height:1.15;font-weight:800;letter-spacing:0.0625rem}
.hero-title .hl{color:transparent;background:linear-gradient(135deg,var(--accent),#ffd07a);-webkit-background-clip:text;background-clip:text}
.hero-sub{margin:1.375rem 0 1.875rem;font-size:1.0625rem;max-width:35rem;color:rgba(255,255,255,.85)}
.hero-actions{display:flex;gap:0.875rem;flex-wrap:wrap}
.hero-badges{display:flex;flex-wrap:wrap;gap:0.625rem 1.375rem;margin-top:2.125rem}
.hero-badges li{font-size:0.875rem;color:rgba(255,255,255,.85);padding-left:1.375rem;position:relative}
.hero-badges li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}
.hero-visual{position:relative;display:flex;justify-content:center}
.hero-visual img{max-height:32.5rem;filter:drop-shadow(0 1.875rem 3.125rem rgba(0,0,0,.5));animation:float 6s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-1rem)}}
.hero-scroll{position:absolute;bottom:1.625rem;left:50%;transform:translateX(-50%);color:rgba(255,255,255,.8);font-size:1.375rem;animation:bounce 2s infinite}
@keyframes bounce{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,0.5rem)}}

/* ===== 数据条 ===== */
.stats{background:var(--navy);color:#fff;padding:3.125rem 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem;text-align:center}
.stat{display:flex;flex-direction:column;align-items:center;position:relative}
.stat-num{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--brand-l));-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.stat-suffix{position:absolute;top:0;right:calc(50% - 3.75rem);font-size:1.5rem;color:var(--accent);font-weight:800}
.stat-label{margin-top:0.625rem;font-size:0.9375rem;color:rgba(255,255,255,.7)}

/* ===== 通用 section ===== */
.section{padding:6rem 0}
.section:nth-of-type(even){background:var(--bg-soft)}
.section-head{text-align:center;max-width:45rem;margin:0 auto 3.375rem}
.eyebrow{font-size:0.8125rem;letter-spacing:0.1875rem;color:var(--brand);font-weight:700;text-transform:uppercase;margin-bottom:0.75rem}
.section-title{font-size:2.125rem;font-weight:800;letter-spacing:0.0625rem}
.section-desc{margin-top:0.875rem;color:var(--muted);font-size:1rem}
.platform-cta{
  margin-top:1.75rem;display:flex;align-items:center;justify-content:center;gap:2rem;flex-wrap:wrap;
}
.platform-cta-web{display:flex;flex-direction:column;align-items:center;gap:0.625rem}
.platform-cta-hint{font-size:0.8125rem;color:var(--muted);margin:0}
.platform-cta-divider{
  display:flex;align-items:center;justify-content:center;align-self:stretch;
  color:var(--muted);font-size:0.8125rem;font-weight:600;
}
.platform-cta-divider::before,.platform-cta-divider::after{
  content:"";width:0.0625rem;flex:1;min-height:2.5rem;background:linear-gradient(180deg,transparent,var(--line),transparent);
}
.platform-cta-divider span{padding:0 0.875rem;white-space:nowrap}
.platform-miniapp-qr{display:flex;flex-direction:column;align-items:center;text-align:center;max-width:10rem}
.platform-miniapp-qr-box{
  width:7.5rem;height:7.5rem;border-radius:1rem;overflow:hidden;border:0.0625rem solid var(--line);
  background:#fff;padding:0.375rem;box-shadow:var(--shadow-sm);
}
.platform-miniapp-qr-box img{width:100%;height:100%;object-fit:contain;border-radius:0.625rem}
.platform-miniapp-qr-label{font-size:0.875rem;font-weight:700;margin:0.75rem 0 0.25rem;color:var(--ink)}
.platform-miniapp-qr-sub{font-size:0.75rem;color:var(--muted);margin:0;line-height:1.45}

/* ===== 产品中心 ===== */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.product-card{background:var(--bg);border:0.0625rem solid var(--line);border-radius:var(--radius);overflow:hidden;transition:var(--t);box-shadow:var(--shadow-sm)}
.product-card:hover{transform:translateY(-0.5rem);box-shadow:var(--shadow);border-color:rgba(232,64,42,.35)}
.product-media{height:13.75rem;display:flex;align-items:center;justify-content:center;padding:1.375rem;background:radial-gradient(circle at 50% 30%,#fdeee9,#fbf4f1)}
.product-media img{max-height:100%;object-fit:contain;transition:var(--t)}
.product-card:hover .product-media img{transform:scale(1.06)}
.product-body{padding:1.375rem}
.product-body h3{font-size:1.125rem;font-weight:700;margin-bottom:0.25rem}
.product-title-wrap{display:flex;align-items:baseline;flex-wrap:wrap;gap:0.25rem 0.5rem;margin-bottom:0.25rem}
.product-title-wrap h3{margin-bottom:0}
.product-manual-trigger{
  padding:0;border:0;background:none;font-size:0.75rem;font-weight:500;color:var(--brand);
  text-decoration:underline;text-underline-offset:0.125rem;cursor:pointer;font-family:inherit;line-height:1.3;
  white-space:nowrap;
}
.product-manual-trigger:hover{color:var(--brand-d)}
.product-body h3 span{display:block;font-size:0.8125rem;color:var(--brand);font-weight:600;margin-top:0.125rem}
.product-body p{color:var(--muted);font-size:0.875rem;margin:0.625rem 0 0.875rem}
.product-specs{display:flex;flex-wrap:wrap;gap:0.5rem}
.product-specs li{font-size:0.75rem;background:var(--bg-soft);color:var(--brand-d);padding:0.25rem 0.625rem;border-radius:62.4375rem;border:0.0625rem solid var(--line)}
.product-strip{margin-top:2.875rem}
.product-strip h4{font-size:0.9375rem;color:var(--muted);font-weight:600;margin-bottom:1rem;text-align:center}
.strip-track{display:grid;grid-template-columns:repeat(8,1fr);gap:0.875rem}
.strip-track figure{background:var(--bg);border:0.0625rem solid var(--line);border-radius:0.75rem;padding:0.75rem;text-align:center;transition:var(--t)}
.strip-track figure:hover{transform:translateY(-0.3125rem);box-shadow:var(--shadow-sm)}
.strip-track img{height:6rem;object-fit:contain;margin:0 auto 0.5rem}
.strip-track figcaption{font-size:0.6875rem;color:var(--muted)}

/* ===== 物联网平台 ===== */
.platform-showcase{margin-bottom:3.5rem}
.platform-layout{
  display:grid;grid-template-columns:minmax(15.5rem,20rem) 1fr;gap:0;align-items:stretch;
  background:linear-gradient(145deg,#fff 0%,var(--bg-soft) 100%);
  border:0.0625rem solid var(--line);border-radius:calc(var(--radius) + 0.25rem);
  overflow:hidden;box-shadow:var(--shadow-sm);
}
.platform-nav{
  display:flex;flex-direction:column;gap:0.375rem;padding:1.375rem 1.125rem;
  border-right:0.0625rem solid var(--line);background:rgba(255,255,255,.72);
}
.platform-nav-title{
  font-size:0.8125rem;font-weight:700;letter-spacing:0.0625rem;color:var(--brand);
  text-transform:uppercase;margin-bottom:0.625rem;padding:0 0.25rem;
}
.platform-tab{
  position:relative;display:flex;align-items:flex-start;gap:0.875rem;width:100%;padding:0.8125rem 0.875rem;
  border:0.0625rem solid transparent;border-radius:0.75rem;background:transparent;
  cursor:pointer;text-align:left;transition:var(--t);font-family:inherit;
}
.platform-tab::before{
  content:"";position:absolute;left:0;top:0.625rem;bottom:0.625rem;width:0.1875rem;border-radius:62.4375rem;
  background:var(--brand);opacity:0;transform:scaleY(0.4);transition:var(--t);
}
.platform-tab-num{
  flex:none;width:1.75rem;height:1.75rem;display:flex;align-items:center;justify-content:center;
  border-radius:0.5rem;background:var(--bg-soft);color:var(--muted);font-size:0.6875rem;font-weight:800;
  transition:var(--t);
}
.platform-tab-text{display:flex;flex-direction:column;gap:0.25rem;min-width:0}
.platform-tab-text strong{font-size:0.9375rem;color:var(--ink);line-height:1.3;transition:var(--t)}
.platform-tab-text small{font-size:0.75rem;color:var(--muted);line-height:1.45}
.platform-tab:hover{background:rgba(255,255,255,.9);border-color:var(--line);box-shadow:var(--shadow-sm)}
.platform-tab.active{
  background:#fff;border-color:rgba(232,64,42,.22);
  box-shadow:0 0.625rem 1.25rem -0.875rem rgba(232,64,42,.28);
}
.platform-tab.active::before{opacity:1;transform:scaleY(1)}
.platform-tab.active .platform-tab-num{background:linear-gradient(135deg,var(--brand),var(--brand-l));color:#fff}
.platform-tab.active .platform-tab-text strong{color:var(--brand-d)}
.platform-preview{min-width:0;padding:1.125rem 1.375rem 0.875rem;display:flex;flex-direction:column}
.platform-preview-head{display:flex;justify-content:flex-end;margin-bottom:0.5rem;min-height:1.375rem}
.platform-badge{
  display:inline-flex;align-items:center;padding:0.3125rem 0.75rem;border-radius:62.4375rem;
  font-size:0.6875rem;font-weight:700;letter-spacing:0.03125rem;
  background:linear-gradient(135deg,rgba(232,64,42,.12),rgba(255,157,60,.16));
  color:var(--brand-d);border:0.0625rem solid rgba(232,64,42,.18);
  transition:var(--t);
}
.platform-preview.is-mobile .platform-badge{
  background:linear-gradient(135deg,rgba(32,26,22,.08),rgba(32,26,22,.04));
  color:var(--ink);border-color:var(--line);
}
.platform-preview-stage{
  position:relative;min-height:calc(30.75rem + 2rem);display:flex;align-items:center;justify-content:center;
  transition:min-height .4s ease;
}
.platform-preview.is-mobile .platform-preview-stage{min-height:calc(30.75rem + 2rem)}
.platform-browser-bar{
  display:flex;align-items:center;gap:0.5rem;padding:0.375rem 0.625rem;
  background:linear-gradient(180deg,#fafafa,#ececec);border-bottom:0.0625rem solid #d6d6d6;
}
.platform-dots{display:inline-flex;gap:0.25rem;flex:none}
.platform-dots i{width:0.5rem;height:0.5rem;border-radius:50%;display:block;box-shadow:inset 0 -0.0625rem 0 rgba(0,0,0,.12)}
.platform-dots i:first-child{background:#ff5f57}
.platform-dots i:nth-child(2){background:#febc2e}
.platform-dots i:nth-child(3){background:#28c840}
.platform-url{
  flex:1;display:inline-flex;align-items:center;justify-content:center;gap:0.25rem;
  max-width:16rem;margin:0 auto;padding:0.1875rem 0.5rem;border-radius:0.3125rem;
  background:#fff;border:0.0625rem solid #d0d0d0;font-size:0.625rem;color:#666;line-height:1.2;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.platform-url-lock{width:0.5625rem;height:0.5625rem;flex:none;color:#8a8a8a}
.platform-browser-viewport{
  aspect-ratio:16/10;width:100%;height:auto;max-height:30.75rem;
  margin:0 auto;background:linear-gradient(180deg,#eef1f4,#e4e9ee);
  overflow:hidden;position:relative;line-height:0;
}
.platform-browser-viewport .platform-shot-img{
  width:100%;height:100%;display:block;
  object-fit:contain;object-position:top center;
  transition:opacity .35s ease,transform .35s ease;
}
.platform-browser-viewport .platform-shot-img.is-fading{opacity:0;transform:scale(1.01)}
.platform-shot-zoom{cursor:zoom-in;outline:none}
.platform-shot-zoom:focus-visible{box-shadow:inset 0 0 0 0.1875rem rgba(232,64,42,.35)}
.platform-browser{
  width:min(100%,49.2rem);margin:0 auto;border-radius:0.875rem;overflow:hidden;border:0.0625rem solid #d8d8d8;
  box-shadow:0 1.125rem 2.5rem -1.25rem rgba(32,26,22,.35),0 0 0 0.0625rem rgba(255,255,255,.8) inset;
  background:#fff;transition:opacity .35s ease,transform .35s ease;
}
.platform-browser[hidden]{
  display:block;opacity:0;pointer-events:none;position:absolute;left:50%;top:0;
  width:min(100%,49.2rem);transform:translateX(-50%) translateY(0.5rem) scale(0.985);
}
.platform-browser:not([hidden]){opacity:1;transform:none;position:relative}
.platform-phone{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  transition:opacity .35s ease,transform .35s ease;
}
.platform-phones{
  display:flex;align-items:flex-end;justify-content:center;gap:1.75rem;
  width:min(100%,49.2rem);margin:0 auto;
  transition:opacity .35s ease,transform .35s ease;
}
.platform-phones[hidden]{
  display:flex;opacity:0;pointer-events:none;position:absolute;left:50%;top:50%;
  width:min(100%,49.2rem);transform:translate(-50%,-50%) scale(0.96);
}
.platform-phones:not([hidden]){opacity:1;transform:none;position:relative}
.platform-preview.is-dual .platform-preview-stage{min-height:calc(34rem + 2rem)}
.platform-preview.is-dual .platform-phone-shell{width:min(100%,12.75rem)}
.platform-preview.is-dual .platform-phone-screen{max-height:24.5rem}
.platform-phone-label{
  margin:0.625rem 0 0;font-size:0.75rem;font-weight:600;color:var(--muted);text-align:center;
}
.platform-phone[hidden]{
  display:flex;opacity:0;pointer-events:none;position:absolute;left:50%;top:50%;
  width:min(100%,49.2rem);transform:translate(-50%,-50%) scale(0.96);
}
.platform-phone:not([hidden]){opacity:1;transform:none;position:relative}
.platform-phone-shell{
  width:min(100%,13rem);padding:0.4375rem;border-radius:1.75rem;
  background:linear-gradient(165deg,#3a3a3a 0%,#151515 100%);
  box-shadow:0 1rem 2rem -0.875rem rgba(0,0,0,.4),inset 0 0.0625rem 0 rgba(255,255,255,.12);
  border:0.125rem solid #444;
}
.platform-phone-notch{
  width:3.25rem;height:0.25rem;border-radius:62.4375rem;background:#0a0a0a;margin:0 auto 0.375rem;
}
.platform-phone-screen{
  border-radius:1.375rem;overflow:hidden;background:#f5f5f5;
  width:100%;aspect-ratio:9/19.5;max-height:24rem;height:auto;
  box-shadow:inset 0 0 0 0.0625rem rgba(255,255,255,.06);
}
.platform-phone-screen .platform-shot-img{
  width:100%;height:100%;display:block;
  object-fit:contain;object-position:top center;
  transition:opacity .35s ease;
}
.platform-phone-screen .platform-shot-img.is-fading{opacity:0}
.platform-phone-shadow{
  width:7.5rem;height:0.625rem;margin-top:0.625rem;border-radius:50%;
  background:radial-gradient(ellipse at center,rgba(32,26,22,.2),transparent 70%);
}
.platform-caption{
  margin:0.75rem auto 0;max-width:36rem;padding:0.5625rem 0.875rem;
  font-size:0.8125rem;color:var(--muted);line-height:1.6;text-align:center;
  background:rgba(255,255,255,.72);border-radius:0.625rem;border:0.0625rem solid var(--line);
}

/* ===== 平台截图 Lightbox ===== */
.platform-lightbox{
  position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;
  padding:1.25rem 5rem;
}
.platform-lightbox[hidden]{display:none!important}
.platform-lightbox-backdrop{
  position:absolute;inset:0;background:rgba(16,12,10,.82);backdrop-filter:blur(0.375rem);
}
.platform-lightbox-dialog{
  position:relative;width:min(100%,72rem);max-height:calc(100vh - 2.5rem);
  display:flex;align-items:center;justify-content:center;z-index:1;
}
.platform-lightbox-body{
  margin:0;width:100%;max-height:calc(100vh - 2.5rem);display:flex;flex-direction:column;
  align-items:center;gap:0.75rem;
}
.platform-lightbox-img{
  display:block;max-width:100%;max-height:calc(100vh - 8rem);width:auto;height:auto;
  object-fit:contain;border-radius:0.625rem;background:#fff;
  box-shadow:0 1.5rem 3.75rem -1rem rgba(0,0,0,.55);
  transition:opacity .25s ease;
}
.platform-lightbox-img.is-switching{opacity:0}
.platform-lightbox-title{
  color:#fff;font-size:0.9375rem;line-height:1.5;text-align:center;max-width:40rem;
  text-shadow:0 0.0625rem 0.25rem rgba(0,0,0,.35);
}
.platform-lightbox-counter{
  color:rgba(255,255,255,.72);font-size:0.75rem;letter-spacing:0.0625rem;
}
.platform-lightbox-close{
  position:fixed;top:1.125rem;right:1.125rem;z-index:102;width:2.5rem;height:2.5rem;border:0;border-radius:50%;
  background:rgba(255,255,255,.16);color:#fff;font-size:1.625rem;line-height:1;cursor:pointer;
  transition:var(--t);font-family:inherit;
}
.platform-lightbox-close:hover{background:rgba(255,255,255,.28)}
.platform-lightbox-nav{
  position:fixed;top:50%;transform:translateY(-50%);z-index:102;
  width:3rem;height:3rem;border:0;border-radius:50%;
  background:rgba(255,255,255,.16);color:#fff;font-size:2rem;line-height:1;cursor:pointer;
  transition:var(--t);font-family:inherit;display:flex;align-items:center;justify-content:center;
}
.platform-lightbox-nav:hover{background:rgba(255,255,255,.28)}
.platform-lightbox-prev{left:1.125rem}
.platform-lightbox-next{right:1.125rem}
@media(max-width:640px){
  .platform-lightbox{padding:0.75rem 3.5rem}
  .platform-lightbox-nav{width:2.5rem;height:2.5rem;font-size:1.625rem}
  .platform-lightbox-prev{left:0.5rem}
  .platform-lightbox-next{right:0.5rem}
  .platform-lightbox-close{top:0.625rem;right:0.625rem}
  .platform-lightbox-img{max-height:calc(100vh - 9rem)}
}

.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.375rem}
.feature{background:var(--bg);border:0.0625rem solid var(--line);border-radius:var(--radius);padding:1.875rem;transition:var(--t)}
.feature:hover{transform:translateY(-0.375rem);box-shadow:var(--shadow);border-color:rgba(232,64,42,.35)}
.feature-ico{width:3.5rem;height:3.5rem;display:flex;align-items:center;justify-content:center;border-radius:0.875rem;background:linear-gradient(135deg,rgba(232,64,42,.12),rgba(255,157,60,.16));margin-bottom:1rem;color:var(--brand)}
.feature-ico svg{width:1.75rem;height:1.75rem}
.feature h3{font-size:1.125rem;margin-bottom:0.5rem}
.feature p{color:var(--muted);font-size:0.875rem}

/* ===== 解决方案 ===== */
.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.375rem}
.solution-card{position:relative;padding:1.875rem;border-radius:var(--radius);color:#fff;overflow:hidden;min-height:10.625rem;display:flex;flex-direction:column;justify-content:flex-end;background:linear-gradient(135deg,var(--brand-d),var(--brand));transition:var(--t)}
.solution-card::before{content:"";position:absolute;inset:0;background:radial-gradient(31.25rem 12.5rem at 100% 0,rgba(255,157,60,.45),transparent 60%);opacity:.75}
.solution-card:nth-child(even){background:linear-gradient(135deg,#3a1a12,#c4452a)}
.solution-card>*{position:relative}
.solution-card:hover{transform:translateY(-0.375rem);box-shadow:var(--shadow)}
.solution-card h3{font-size:1.25rem;margin-bottom:0.5rem}
.solution-card p{font-size:0.875rem;color:rgba(255,255,255,.88)}

/* ===== 关于我们 ===== */
.about-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:3rem;align-items:center}
.about-copy .section-title,.about-copy .eyebrow{text-align:left}
.about-copy p{color:var(--muted);margin-top:1rem;font-size:0.96875rem}
.about-copy strong{color:var(--ink)}
.about-points{display:grid;gap:0.875rem;margin-top:1.625rem}
.about-points li{display:flex;flex-direction:column;padding-left:1.125rem;border-left:0.1875rem solid var(--brand)}
.about-points strong{font-size:1rem}
.about-points span{font-size:0.875rem;color:var(--muted)}
.about-card{background:linear-gradient(160deg,var(--navy),#4a221a);color:#fff;border-radius:var(--radius);padding:2.125rem;box-shadow:var(--shadow)}
.about-card h3{font-size:1.125rem;margin-bottom:1.125rem;color:var(--accent)}
.about-card dl div{display:flex;justify-content:space-between;gap:1rem;padding:0.75rem 0;border-bottom:0.0625rem solid rgba(255,255,255,.12);font-size:0.875rem}
.about-card dt{color:rgba(255,255,255,.65);white-space:nowrap}
.about-card dd{text-align:right;font-weight:500}

/* ===== 联系我们 ===== */
.contact-inner{display:grid;grid-template-columns:1fr 1.1fr;gap:2.5rem}
.contact-info{display:grid;gap:1.375rem;align-content:start}
.ci-item{display:flex;gap:1rem;align-items:flex-start}
.ci-ico{width:2.875rem;height:2.875rem;flex:none;display:flex;align-items:center;justify-content:center;border-radius:0.75rem;background:linear-gradient(135deg,rgba(232,64,42,.12),rgba(255,157,60,.16));color:var(--brand)}
.ci-ico svg{width:1.375rem;height:1.375rem}
.ci-item strong{font-size:0.9375rem}
.ci-item p{color:var(--muted);font-size:0.875rem}
.contact-form{background:var(--bg);border:0.0625rem solid var(--line);border-radius:var(--radius);padding:1.875rem;box-shadow:var(--shadow-sm)}
.field{margin-bottom:1rem}
.field label{display:block;font-size:0.875rem;font-weight:600;margin-bottom:0.375rem}
.field input,.field textarea{width:100%;padding:0.75rem 0.875rem;border:0.0625rem solid var(--line);border-radius:0.625rem;font-size:0.9375rem;font-family:inherit;transition:var(--t);background:var(--bg-soft)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--brand);background:#fff;box-shadow:0 0 0 0.1875rem rgba(232,64,42,.14)}
.form-tip{margin-top:0.875rem;color:#0a8a4a;font-size:0.875rem;font-weight:600}
/* 联系卡片：左侧信息可点击 + 右侧微信二维码主卡 */
.contact-info a{transition:var(--t)}
.contact-info a:hover{color:var(--brand)}
.contact-card{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:var(--bg);border:0.0625rem solid var(--line);border-radius:var(--radius);padding:2.25rem 1.875rem;box-shadow:var(--shadow-sm)}
.contact-card-title{font-size:1.25rem;font-weight:700}
.contact-card-sub{color:var(--muted);font-size:0.875rem;margin:0.5rem 0 1.375rem;max-width:18.75rem}
.qr-box{width:11.25rem;height:11.25rem;border-radius:1rem;overflow:hidden;border:0.0625rem solid var(--line);background:#fff;display:flex;align-items:center;justify-content:center}
.qr-box img{width:100%;height:100%;object-fit:contain}
.qr-ph{width:100%;height:100%;flex-direction:column;align-items:center;justify-content:center;gap:0.375rem;font-size:0.8125rem;color:var(--muted);text-align:center;padding:0.375rem;background:repeating-linear-gradient(45deg,#faf6f3,#faf6f3 0.4375rem,#f2ebe6 0.4375rem,#f2ebe6 0.875rem)}
.qr-ph small{font-size:0.625rem;opacity:.7}
.contact-card-foot{margin-top:1.25rem;font-size:0.875rem;color:var(--muted)}
.contact-card-foot a{color:var(--brand);font-weight:600}
.contact-card-foot a:hover{text-decoration:underline}

/* ===== 产品说明书弹窗 ===== */
.product-manual-modal{
  position:fixed;inset:0;z-index:110;display:flex;align-items:center;justify-content:center;padding:1.25rem;
}
.product-manual-modal[hidden]{display:none!important}
.product-manual-backdrop{
  position:absolute;inset:0;background:rgba(16,12,10,.72);backdrop-filter:blur(0.375rem);
}
.product-manual-dialog{
  position:relative;z-index:1;width:min(100%,22.5rem);padding:1.75rem 1.5rem 1.5rem;
  background:#fff;border-radius:calc(var(--radius) + 0.125rem);box-shadow:var(--shadow);text-align:center;
}
.product-manual-close{
  position:absolute;top:0.75rem;right:0.75rem;width:2rem;height:2rem;border:0;border-radius:50%;
  background:var(--bg-soft);color:var(--muted);font-size:1.375rem;line-height:1;cursor:pointer;
  transition:var(--t);font-family:inherit;
}
.product-manual-close:hover{background:var(--line);color:var(--ink)}
.product-manual-title{font-size:1.125rem;font-weight:700;margin:0 1.5rem 0.5rem 0;line-height:1.4;text-align:left}
.product-manual-sub{font-size:0.8125rem;color:var(--muted);margin:0 0 1.125rem;line-height:1.55;text-align:left}
.product-manual-qr{
  width:11.25rem;height:11.25rem;margin:0 auto 1rem;padding:0.5rem;border-radius:1rem;
  border:0.0625rem solid var(--line);background:#fff;
}
.product-manual-qr img,.product-manual-qr canvas{width:100%!important;height:100%!important;object-fit:contain;display:block}
.product-manual-link{
  display:inline-flex;align-items:center;justify-content:center;gap:0.375rem;
  font-size:0.9375rem;font-weight:600;color:var(--brand);word-break:break-all;
}
.product-manual-link:hover{text-decoration:underline;color:var(--brand-d)}

/* ===== 页脚 ===== */
.site-footer{background:var(--navy);color:rgba(255,255,255,.8)}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:1.875rem;padding:3.5rem 1.5rem 2.25rem}
.footer-logo{height:3.125rem;width:auto;margin-bottom:0.875rem;background:transparent;border:0;box-shadow:none;border-radius:0}
.footer-brand p{font-size:0.875rem;line-height:1.8}
.footer-links{display:flex;flex-direction:column;gap:0.625rem}
.footer-links a{font-size:0.875rem;transition:var(--t)}
.footer-links a:hover{color:var(--accent);padding-left:0.25rem}
.footer-contact p{font-size:0.875rem;margin-bottom:0.5rem}
.footer-bottom{border-top:0.0625rem solid rgba(255,255,255,.12)}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:0.625rem;padding-top:1.125rem;padding-bottom:1.125rem;font-size:0.8125rem;color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:var(--accent)}

/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:1.375rem;bottom:1.375rem;width:2.875rem;height:2.875rem;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.25rem;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(0.625rem);transition:var(--t);z-index:40}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--brand-d)}

/* ===== reveal 动画 ===== */
.reveal{opacity:0;transform:translateY(1.75rem);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .hero-inner{grid-template-columns:1fr;text-align:center}
  .hero-sub{margin-left:auto;margin-right:auto}
  .hero-actions,.hero-badges{justify-content:center}
  .hero-visual{order:-1}
  .hero-visual img{max-height:21.25rem}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid,.solution-grid{grid-template-columns:repeat(2,1fr)}
  .platform-layout{grid-template-columns:1fr}
  .platform-nav{
    flex-direction:row;flex-wrap:wrap;overflow-x:auto;gap:0.5rem;padding:1rem 1.125rem;
    border-right:0;border-bottom:0.0625rem solid var(--line);
    scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
  }
  .platform-nav-title{flex:0 0 100%;margin-bottom:0.125rem}
  .platform-tab{flex:0 0 auto;min-width:10.5rem;scroll-snap-align:start;padding:0.75rem 0.875rem}
  .platform-tab::before{top:0.375rem;bottom:0.375rem}
  .platform-tab-text small{display:none}
  .platform-cta{gap:1.25rem}
  .platform-cta-divider{flex-direction:column;width:100%;align-self:auto}
  .platform-cta-divider::before,.platform-cta-divider::after{width:100%;min-height:0;height:0.0625rem;flex:none;background:linear-gradient(90deg,transparent,var(--line),transparent)}
  .platform-cta-divider span{padding:0.375rem 0}
  .platform-preview{padding:1rem 1.125rem 0.75rem}
  .platform-preview-stage{min-height:0}
  .platform-preview-stage{min-height:calc(25.5rem + 2rem)}
  .platform-preview.is-mobile .platform-preview-stage{min-height:calc(25.5rem + 2rem)}
  .platform-phones{gap:1.25rem}
  .platform-preview.is-dual .platform-preview-stage{min-height:calc(28rem + 2rem)}
  .platform-preview.is-dual .platform-phone-shell{width:min(100%,11.25rem)}
  .platform-preview.is-dual .platform-phone-screen{max-height:21rem}
  .platform-phone-shell{width:min(100%,11.25rem)}
  .platform-phone-screen{max-height:20rem}
  .platform-browser{width:min(100%,40.8rem)}
  .platform-browser[hidden]{width:min(100%,40.8rem)}
  .platform-browser-viewport{width:100%;max-height:25.5rem}
  .strip-track{grid-template-columns:repeat(4,1fr)}
  .about-inner,.contact-inner{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
html[data-lang="en"] .main-nav a{font-size:0.875rem;padding:0.5rem 0.6875rem}
html[data-lang="en"] .nav-cta{font-size:0.875rem;padding:0.6875rem 1.125rem}
html[data-lang="en"] .brand-text strong{font-size:1rem}
html[data-lang="en"] .hero-title{font-size:2.625rem}
html[data-lang="en"] .section-title{font-size:2rem}
html[data-lang="en"] .about-card dl div{font-size:0.8125rem}
@media(max-width:640px){
  .brand-logo{height:2.125rem}
  .brand-text small{display:none}
  .lang-switch{order:2;margin-left:auto;margin-right:0.5rem}
  .nav-toggle{order:3}
  .main-nav{
    position:fixed;top:4.5rem;left:0;right:0;background:#fff;flex-direction:column;gap:0;
    padding:0.625rem 1.25rem 1.25rem;box-shadow:0 1.25rem 2.5rem -1.25rem rgba(0,0,0,.4);
    transform:translateY(-130%);transition:var(--t);max-height:calc(100vh - 4.5rem);overflow:auto;
  }
  .main-nav.open{transform:translateY(0)}
  .main-nav a{color:var(--ink);padding:0.875rem 0.5rem;border-bottom:0.0625rem solid var(--line)}
  .nav-cta{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:1.875rem 0.75rem}
  .product-grid{grid-template-columns:1fr}
  .feature-grid,.solution-grid{grid-template-columns:1fr}
  .platform-tab{min-width:8.75rem}
  .platform-preview-stage{min-height:0}
  .platform-preview-stage{min-height:calc(21rem + 2rem)}
  .platform-preview.is-mobile .platform-preview-stage{min-height:calc(21rem + 2rem)}
  .platform-phones{flex-direction:column;align-items:center;gap:1.5rem}
  .platform-preview.is-dual .platform-preview-stage{min-height:calc(24rem + 2rem)}
  .platform-preview.is-dual .platform-phone-shell{width:min(100%,10.25rem)}
  .platform-preview.is-dual .platform-phone-screen{max-height:18.5rem}
  .platform-phone-shell{width:min(100%,10rem)}
  .platform-phone-screen{max-height:17rem}
  .platform-browser{width:min(100%,33.6rem)}
  .platform-browser[hidden]{width:min(100%,33.6rem)}
  .platform-browser-viewport{width:100%;max-height:21rem}
  .strip-track{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr;text-align:center}
  .footer-links{align-items:center}
  .section{padding:4rem 0}
  .stat-suffix{right:calc(50% - 2.75rem)}
}