/* =============================================================
   Visualeader (Shenzhen Zhongshengtai) — Homepage Stylesheet
   Brand color from official logo: #00A0E0
   Positioning: One-Stop LED Display Solutions
   Markets: Korea · Russia · Europe · Middle East
   V2.0 — accent orange removed, brand blue is the only accent
   ============================================================= */

/* ---------- 1. Design Tokens (FROZEN — do not change values) ---------- */
:root{
  --brand:#00A0E0; --brand-600:#008FCA; --brand-700:#0079AB;
  --brand-300:#5CC4EF; --brand-100:#D6EEFB; --brand-soft:#EEF8FE;

  --ink-900:#0A1622; --ink-800:#10202F; --ink-700:#1C2F42;
  --ink-500:#4A5B6D; --ink-400:#6B7A8A; --ink-300:#9AA7B4;
  --line:#E4E9EF; --line-soft:#EEF1F5;
  --paper:#FFFFFF; --paper-2:#F6F9FC; --paper-3:#EEF3F8;

  --font-sans:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;

  --container:1240px; --gap:24px;
  --radius:14px; --radius-sm:10px; --radius-lg:22px;
  --shadow-sm:0 2px 10px rgba(10,22,34,.06);
  --shadow:0 10px 30px rgba(10,22,34,.10);
  --shadow-lg:0 24px 60px rgba(10,22,34,.16);
  --shadow-brand:0 14px 34px rgba(0,160,224,.28);
  --t:.28s cubic-bezier(.2,.7,.3,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-sans);color:var(--ink-800);background:var(--paper);
  line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{font-weight:800;line-height:1.14;color:var(--ink-900);margin:0;letter-spacing:-.015em}
p{margin:0}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,select,textarea{font-family:inherit;font-size:15px}

/* ---------- 3. Layout helpers ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:64px 0}
.section--paper2{background:var(--paper-2)}
.section--ink{background:var(--ink-900);color:#C6D0DA}
.section--ink h2,.section--ink h3{color:#fff}

.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:800;
  letter-spacing:.16em;text-transform:uppercase;color:var(--brand-700)}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--brand);border-radius:2px}
.section--ink .eyebrow{color:var(--brand-300)}

.section-head{max-width:780px;margin-bottom:56px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(29px,3.5vw,44px);margin:15px 0 18px}
.section-head p{color:var(--ink-500);font-size:17.5px;line-height:1.7}
.section--ink .section-head p{color:var(--ink-300)}

/* TBD placeholder — 客户定稿会用，醒目待确认项 */
.tbd{display:inline-block;padding:2px 10px;border-radius:6px;background:#FFF4CC;
  border:1px dashed #E0A800;color:#8A6D00;font-size:.9em;font-weight:700;font-style:normal;
  letter-spacing:0;line-height:1.5;max-width:100%;overflow-wrap:anywhere}
/* 大号数字位里的占位符固定小字号，否则会撑破窄栅格 */
.trust-num .tbd,.fstat-num .tbd{font-size:13px;padding:2px 8px}
.trust-item,.fstat{min-width:0}

/* ---------- 4. Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 28px;border-radius:999px;font-weight:700;font-size:15px;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
  white-space:nowrap;border:1.5px solid transparent}
.btn svg{width:17px;height:17px;flex:none}
.btn--brand{background:var(--brand);color:#fff;box-shadow:var(--shadow-brand)}
.btn--brand:hover{background:var(--brand-600);transform:translateY(-2px);box-shadow:0 18px 40px rgba(0,160,224,.36)}
.btn--ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.3)}
.btn--ghost:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.55)}
.btn--line{background:#fff;color:var(--ink-900);border-color:var(--line)}
.btn--line:hover{border-color:var(--brand);color:var(--brand-700);transform:translateY(-2px)}
.btn--lg{padding:17px 34px;font-size:16px}

.link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:15px;
  color:var(--brand-700);transition:gap var(--t)}
.link-arrow:hover{gap:13px}

/* ---------- 5. Top bar ---------- */
.topbar{background:var(--ink-900);color:var(--ink-300);font-size:13px}
.topbar .container{display:flex;align-items:center;justify-content:space-between;height:42px;gap:20px}
.topbar a{color:var(--ink-300);transition:color var(--t)}
.topbar a:hover{color:#fff}
.topbar-left{display:flex;gap:24px;align-items:center;min-width:0}
.topbar-left span{display:inline-flex;align-items:center;gap:7px;white-space:nowrap}
.topbar-left svg{width:14px;height:14px;color:var(--brand-300);flex:none}
.topbar-right{display:flex;gap:18px;align-items:center}
.topbar-lang{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:#fff}
.topbar-lang svg{width:14px;height:14px}

/* ---------- 6. Header ---------- */
.header{position:sticky;top:0;z-index:900;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--line);
  transition:box-shadow var(--t)}
.header.is-scrolled{box-shadow:0 6px 24px rgba(10,22,34,.09)}
.header .container{display:flex;align-items:center;height:78px;gap:24px}
.logo{display:flex;align-items:center;flex:none;margin-right:auto}
.logo img{height:38px;width:auto}
/* 导航靠右：与右侧 CTA 一同贴在右上角 */
.nav{display:flex;align-items:center;gap:30px;margin-left:0}
.nav a{font-size:15.5px;font-weight:650;color:var(--ink-700);position:relative;padding:6px 0;
  transition:color var(--t)}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;
  background:var(--brand);border-radius:2px;transition:width var(--t)}
.nav a:hover{color:var(--brand-700)}
.nav a:hover::after{width:100%}
.header-cta{display:flex;align-items:center;gap:14px;flex:none}
.burger{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--ink-800)}
.burger svg{width:22px;height:22px}

/* 默认 display:none —— 关闭时完全脱离布局，避免 translateX(100%) 撑出横向滚动条。
   打开时由 JS 先加 .is-mounted 使其 display:block，再下一帧加 .is-open 触发滑入动画。 */
.mobile-nav{display:none;position:fixed;inset:0 0 0 auto;width:min(88vw,360px);z-index:1000;
  background:#fff;box-shadow:-20px 0 60px rgba(10,22,34,.22);padding:24px;
  transform:translateX(100%);transition:transform .32s cubic-bezier(.2,.7,.3,1);overflow-y:auto}
.mobile-nav.is-mounted{display:block}
.mobile-nav.is-open{transform:translateX(0)}
.mobile-nav .m-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px}
.mobile-nav .m-head img{height:34px}
.mobile-nav a.m-link{display:block;padding:15px 0;border-bottom:1px solid var(--line-soft);
  font-size:17px;font-weight:700;color:var(--ink-800)}
.mobile-nav .btn{width:100%;margin-top:24px}
.nav-backdrop{display:none;position:fixed;inset:0;background:rgba(10,22,34,.5);z-index:999}
.nav-backdrop.is-open{display:block}

/* ---------- 7. Hero carousel ---------- */
.hero{position:relative;background:var(--ink-900);overflow:hidden}
.hero-track{position:relative;min-height:660px}
.hero-slide{position:absolute;inset:0;opacity:0;visibility:hidden;
  transition:opacity .8s ease,visibility .8s;display:flex;align-items:center}
.hero-slide.is-active{opacity:1;visibility:visible}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center right}
.hero-slide::after{content:"";position:absolute;inset:0}
/* 深底屏：左侧压暗，白字 */
.hero-slide--dark::after{background:linear-gradient(100deg,rgba(6,16,26,.9) 0%,rgba(6,16,26,.75) 34%,rgba(6,16,26,.25) 58%,rgba(6,16,26,.05) 78%)}
/* 浅底屏（newbanner）：左侧提亮，深字 */
.hero-slide--light::after{background:linear-gradient(100deg,rgba(248,250,252,.96) 0%,rgba(248,250,252,.88) 32%,rgba(248,250,252,.45) 54%,rgba(248,250,252,0) 72%)}

.hero-inner{position:relative;z-index:2;width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.hero-copy{max-width:610px;padding:70px 0}
.hero-copy .eyebrow{margin-bottom:20px}
.hero-title,.hero h1{font-size:clamp(36px,5.1vw,62px);line-height:1.06;margin:0 0 22px;letter-spacing:-.028em}
.hero-sub{font-size:clamp(16.5px,1.55vw,19px);line-height:1.62;margin-bottom:36px;max-width:540px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

.hero-slide--dark .hero-title,.hero-slide--dark h1{color:#fff}
.hero-slide--dark .hero-sub{color:#C6D0DA}
.hero-slide--dark .eyebrow{color:var(--brand-300)}
.hero-slide--light .hero-title,.hero-slide--light h1{color:var(--ink-900)}
.hero-slide--light .hero-sub{color:var(--ink-500)}
.hero-slide--light .eyebrow{color:var(--brand-700)}

.hero-dots{position:absolute;left:50%;transform:translateX(-50%);bottom:30px;z-index:5;
  display:flex;gap:11px}
.hero-dots button{width:34px;height:4px;border-radius:99px;background:rgba(140,160,180,.45);
  transition:background var(--t),width var(--t)}
.hero-dots button.is-active{background:var(--brand);width:52px}

/* ---------- 8. Trust bar ---------- */
.trustbar{background:var(--brand);color:#fff}
.trustbar .container{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding-top:20px;padding-bottom:20px}
.trust-item{text-align:center;position:relative}
.trust-item+.trust-item::before{content:"";position:absolute;left:0;top:4px;bottom:4px;
  width:1px;background:rgba(255,255,255,.26)}
.trust-num{font-size:clamp(22px,2.4vw,30px);font-weight:800;line-height:1.15;letter-spacing:-.02em}
.trust-label{font-size:12px;letter-spacing:.06em;text-transform:uppercase;
  color:rgba(255,255,255,.86);margin-top:3px;font-weight:600}

/* ---------- 9. Featured products (2 big cards) ---------- */
.featured-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.fcard{border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:#fff;display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.fcard:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--brand-100)}
.fcard-media{background:var(--paper-3);aspect-ratio:4/3;overflow:hidden}
.fcard-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.fcard:hover .fcard-media img{transform:scale(1.045)}
.fcard-body{padding:34px 32px 32px;display:flex;flex-direction:column;flex:1}
.fcard-body h3{font-size:26px;margin-bottom:10px}
.fcard-pitch{font-size:14px;font-weight:700;color:var(--brand-700);letter-spacing:.03em;
  margin-bottom:20px;padding-bottom:20px;border-bottom:1px solid var(--line-soft)}
.fcard-list{display:grid;gap:11px;margin-bottom:24px}
.fcard-list li{display:flex;gap:11px;font-size:15px;color:var(--ink-500);line-height:1.55}
.fcard-list svg{width:17px;height:17px;color:var(--brand);flex:none;margin-top:3px}
.fcard-spec{font-size:13.5px;color:var(--ink-400);background:var(--paper-2);
  border-radius:var(--radius-sm);padding:12px 15px;margin-bottom:24px;line-height:1.55}
.fcard-foot{margin-top:auto}

/* ---------- 10. Capability (7 steps) ---------- */
.steps{display:grid;grid-template-columns:repeat(7,1fr);gap:12px;position:relative}
/* 连接线只画在图标圆心高度，且用 z-index 压在图标下方 */
.steps::before{content:"";position:absolute;top:32px;left:7%;right:7%;height:2px;z-index:0;
  background:linear-gradient(90deg,var(--brand-100),var(--brand),var(--brand-100));border-radius:2px}
.step{text-align:center;position:relative;z-index:2;display:flex;flex-direction:column;align-items:center}
.step-ico{width:64px;height:64px;margin:0 auto 14px;border-radius:50%;background:#fff;
  border:2px solid var(--brand-100);display:flex;align-items:center;justify-content:center;
  color:var(--brand-700);flex:none;position:relative;
  box-shadow:0 0 0 6px var(--paper-2);
  transition:transform var(--t),border-color var(--t),background var(--t),color var(--t)}
.step-ico svg{width:26px;height:26px;display:block}
/* 步骤序号小角标 */
.step-no{position:absolute;top:-4px;right:-4px;width:22px;height:22px;border-radius:50%;
  background:var(--brand);color:#fff;font-size:11.5px;font-weight:800;
  display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px rgba(0,160,224,.4)}
.step:hover .step-ico{transform:translateY(-4px);border-color:var(--brand);
  background:var(--brand);color:#fff}
.step h4{font-size:15px;margin-bottom:6px;line-height:1.3;min-height:2.6em;
  display:flex;align-items:center;justify-content:center}
.step p{font-size:13px;color:var(--ink-400);line-height:1.5}

/* ---------- 11. Scenarios ---------- */
.scen-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scen{border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;
  background:#fff;transition:transform var(--t),box-shadow var(--t),border-color var(--t);
  position:relative;overflow:hidden}
.scen::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand);
  transform:scaleY(0);transform-origin:top;transition:transform var(--t)}
.scen:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand-100)}
.scen:hover::before{transform:scaleY(1)}
.scen-ico{width:52px;height:52px;border-radius:13px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;color:var(--brand-700);margin-bottom:20px}
.scen-ico svg{width:24px;height:24px}
.scen h3{font-size:19px;margin-bottom:10px}
.scen p{font-size:14.8px;color:var(--ink-500);line-height:1.6}

/* ---------- 12. Product matrix ---------- */
.pm-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.pm{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.pm:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand-100)}
.pm-series{display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.1em;
  color:var(--brand-700);background:var(--brand-soft);padding:5px 10px;border-radius:6px;margin-bottom:15px}
.pm h3{font-size:17.5px;margin-bottom:9px}
.pm p{font-size:14px;color:var(--ink-400);line-height:1.58}

/* ---------- 13. About ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:start}
.about-copy p{font-size:16.5px;color:var(--ink-500);line-height:1.78;margin-bottom:20px}
.about-copy strong{color:var(--ink-800);font-weight:700}
.adv-grid{display:grid;gap:18px}
.adv{border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:var(--radius-sm);
  padding:22px 24px;background:#fff;transition:box-shadow var(--t),transform var(--t)}
.adv:hover{box-shadow:var(--shadow-sm);transform:translateX(3px)}
.adv h4{font-size:16.5px;margin-bottom:8px}
.adv p{font-size:14.6px;color:var(--ink-500);line-height:1.62}

/* ---------- 14. Factory (dark) ---------- */
.fact-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:52px}
.fstat{background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius);padding:26px 24px;transition:background var(--t),border-color var(--t)}
.fstat:hover{background:rgba(0,160,224,.1);border-color:rgba(0,160,224,.4)}
.fstat-num{font-size:27px;font-weight:800;color:#fff;line-height:1.2;margin-bottom:8px}
.fstat-label{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-300);font-weight:600}
.fact-gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.fgal{border-radius:var(--radius);overflow:hidden;position:relative;aspect-ratio:4/3;background:var(--ink-800)}
.fgal img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease;opacity:.88}
.fgal:hover img{transform:scale(1.06);opacity:1}
.fgal figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 18px 15px;
  background:linear-gradient(transparent,rgba(6,16,26,.88));color:#fff;font-size:14px;font-weight:700}

/* ---------- 15. Certifications ---------- */
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cert{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:20px;
  text-align:center;transition:transform var(--t),box-shadow var(--t)}
.cert:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.cert-img{aspect-ratio:3/4;background:var(--paper-2);border-radius:var(--radius-sm);
  overflow:hidden;margin-bottom:16px;display:flex;align-items:center;justify-content:center}
.cert-img img{width:100%;height:100%;object-fit:contain}
.cert-ph{aspect-ratio:3/4;border:1.5px dashed var(--line);border-radius:var(--radius-sm);
  margin-bottom:16px;display:flex;align-items:center;justify-content:center;
  background:repeating-linear-gradient(45deg,#fafcfe,#fafcfe 10px,#f2f6fa 10px,#f2f6fa 20px)}
.cert h4{font-size:15.5px}
.cert p{font-size:13px;color:var(--ink-400);margin-top:5px}

/* ---------- 16. Projects ---------- */
.proj-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.proj{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:transform var(--t),box-shadow var(--t)}
.proj:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.proj-media{aspect-ratio:4/3;overflow:hidden;background:var(--paper-3)}
.proj-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.proj:hover .proj-media img{transform:scale(1.06)}
.proj-ph{aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;
  background:repeating-linear-gradient(45deg,#fafcfe,#fafcfe 10px,#f2f6fa 10px,#f2f6fa 20px)}
.proj-body{padding:22px 22px 24px}
.proj-meta{display:flex;gap:8px;align-items:center;font-size:12px;font-weight:700;
  letter-spacing:.07em;text-transform:uppercase;color:var(--brand-700);margin-bottom:11px}
.proj-meta span:nth-child(2){color:var(--ink-300)}
.proj h3{font-size:17px;margin-bottom:9px;line-height:1.32}
.proj p{font-size:14.2px;color:var(--ink-500);line-height:1.58}

/* ---------- 17. Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:64px;align-items:start}
.contact-info h2{margin-bottom:18px}
.contact-info>p{color:var(--ink-300);font-size:17px;line-height:1.7;margin-bottom:34px}
.ci-list{display:grid;gap:20px;margin-bottom:32px}
.ci{display:flex;gap:15px;align-items:flex-start}
.ci-ico{width:44px;height:44px;border-radius:11px;background:rgba(0,160,224,.14);
  display:flex;align-items:center;justify-content:center;color:var(--brand-300);flex:none}
.ci-ico svg{width:20px;height:20px}
.ci-label{font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-400);
  font-weight:700;margin-bottom:4px}
.ci-value{color:#fff;font-size:16px;font-weight:650}
.ci-value a:hover{color:var(--brand-300)}

.form-card{background:#fff;border-radius:var(--radius-lg);padding:38px;box-shadow:var(--shadow-lg)}
.form-card h3{font-size:21px;margin-bottom:6px}
.form-card .fc-sub{font-size:14.5px;color:var(--ink-400);margin-bottom:26px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.field{display:flex;flex-direction:column}
.field label{font-size:13px;font-weight:700;color:var(--ink-700);margin-bottom:7px}
.field label i{color:var(--brand);font-style:normal}
.field input,.field select,.field textarea{padding:12px 14px;border:1.5px solid var(--line);
  border-radius:var(--radius-sm);color:var(--ink-800);background:#fff;transition:border-color var(--t),box-shadow var(--t)}
.field textarea{resize:vertical;min-height:96px}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(0,160,224,.14)}
.form-card .btn{width:100%;margin-top:8px}
.form-note{font-size:12.5px;color:var(--ink-400);text-align:center;margin-top:14px;line-height:1.5}

/* ---------- 18. Footer ---------- */
.footer{background:#06101A;color:var(--ink-300);padding:64px 0 0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:48px}
.foot-brand img{height:36px;margin-bottom:20px}
.foot-brand p{font-size:14.5px;line-height:1.7;color:var(--ink-400);margin-bottom:22px;max-width:300px}
.foot-social{display:flex;gap:11px}
.foot-social a{width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.07);
  display:flex;align-items:center;justify-content:center;color:var(--ink-300);transition:background var(--t),color var(--t)}
.foot-social a:hover{background:var(--brand);color:#fff}
.foot-social svg{width:17px;height:17px}
.foot-col h4{font-size:14px;color:#fff;letter-spacing:.09em;text-transform:uppercase;margin-bottom:20px}
.foot-col li{margin-bottom:11px}
.foot-col a{font-size:14.5px;color:var(--ink-400);transition:color var(--t)}
.foot-col a:hover{color:var(--brand-300)}
.foot-qr{display:flex;gap:14px;margin-top:6px}
.foot-qr figure{margin:0;text-align:center}
.foot-qr img{width:84px;height:84px;border-radius:8px;background:#fff;padding:5px}
.foot-qr figcaption{font-size:11.5px;color:var(--ink-400);margin-top:7px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;display:flex;
  justify-content:space-between;align-items:center;gap:20px;font-size:13.5px;color:var(--ink-400);flex-wrap:wrap}
.foot-bottom a:hover{color:var(--brand-300)}

/* ---------- 19. Floating actions ---------- */
.float-actions{position:fixed;right:18px;bottom:24px;z-index:800;display:flex;flex-direction:column;gap:10px}
.fab{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  color:#fff;box-shadow:var(--shadow);transition:transform var(--t),box-shadow var(--t)}
.fab:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.fab svg{width:23px;height:23px}
.fab--wa{background:#25D366}
.fab--mail{background:var(--brand)}
.fab--top{background:var(--ink-800);opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t),transform var(--t)}
.fab--top.is-show{opacity:1;visibility:visible}

/* ---------- 20. Reveal on scroll ---------- */
[data-reveal]{opacity:0;transform:translateY(24px);
  transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 21. Responsive ---------- */
@media (max-width:1240px){
  .steps{grid-template-columns:repeat(4,1fr);gap:26px 14px}
  .steps::before{display:none}
}
@media (max-width:1080px){
  .nav{display:none}
  .burger{display:flex}
  .header-cta .btn{display:none}
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:44px}
  .pm-grid,.cert-grid,.proj-grid,.fact-gallery,.fact-stats{grid-template-columns:repeat(2,1fr)}
  .scen-grid{grid-template-columns:repeat(2,1fr)}
  .hero-track{min-height:560px}
}
@media (max-width:860px){
  .section{padding:70px 0}
  .section-head{margin-bottom:40px}
  .featured-grid{grid-template-columns:1fr;gap:24px}
  .topbar-left span:not(:first-child){display:none}
  .foot-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:768px){
  .trustbar .container{grid-template-columns:repeat(2,1fr);gap:28px 14px}
  .trust-item+.trust-item::before{display:none}
  .steps{grid-template-columns:repeat(2,1fr)}
  .hero-track{min-height:520px}
  .hero-copy{padding:56px 0}
  /* 窄屏下图片被裁到中部亮区，横向遮罩失效 —— 改为整屏纵向遮罩保证文案可读 */
  .hero-bg{object-position:center}
  .hero-slide--light::after{background:linear-gradient(180deg,rgba(246,249,252,.97) 0%,rgba(246,249,252,.93) 52%,rgba(246,249,252,.80) 100%)}
  .hero-slide--dark::after{background:linear-gradient(180deg,rgba(6,16,26,.93) 0%,rgba(6,16,26,.86) 52%,rgba(6,16,26,.72) 100%)}
  .form-row{grid-template-columns:1fr}
  .fact-stats{gap:14px}
  .form-card{padding:28px 22px}
}
@media (max-width:560px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  /* 紧凑型卡片在小屏保持双列，避免页面被拉得过长 */
  .pm-grid,.cert-grid,.fact-gallery{grid-template-columns:repeat(2,1fr);gap:12px}
  .pm{padding:20px 16px}
  .pm h3{font-size:15.5px}
  .pm p{font-size:12.8px}
  .cert{padding:13px}
  .cert h4{font-size:13.5px}
  .cert p{font-size:11.5px}
  /* 图文卡片仍单列，保证可读性 */
  .scen-grid,.proj-grid{grid-template-columns:1fr}
  .scen{padding:26px 22px}
  .foot-grid{grid-template-columns:1fr;gap:32px}
  .topbar-left span{display:none}
  .topbar-left span:first-child{display:inline-flex}
  .hero-track{min-height:480px}
  .hero-actions .btn{flex:1;min-width:0}
  .fact-stats{grid-template-columns:1fr 1fr}
  .foot-bottom{flex-direction:column;text-align:center;gap:10px}
  .float-actions{right:12px;bottom:14px}
  .fab{width:44px;height:44px}
}

/* =============================================================
   V3 新增组件：mega menu / 方案板块 / 视频 / Why Choose / 资讯
   ============================================================= */

/* ---------- 22. Mega menu（产品二级导航）---------- */
/* nav-item 撑满 header 高度；has-mega 用 static 定位，
   让 .mega 以 sticky 的 .header 为基准铺满整行 */
.nav-item{position:relative;display:flex;align-items:center;align-self:stretch}
.nav-item.has-mega{position:static}
.nav-item>a{display:inline-flex;align-items:center;gap:6px}
.nav-item>a svg.chev{width:13px;height:13px;transition:transform var(--t)}
.has-mega:hover>a svg.chev{transform:rotate(180deg)}
.mega{position:absolute;top:100%;left:0;right:0;
  z-index:880;background:#fff;
  border-top:1px solid var(--line);box-shadow:0 22px 50px rgba(10,22,34,.14);
  opacity:0;visibility:hidden;transform:translateY(-8px);pointer-events:none;
  transition:opacity .22s ease,transform .22s ease,visibility .22s;padding:32px 0 34px}
.has-mega:hover .mega{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}
.mega-inner{display:grid;grid-template-columns:1fr 292px;gap:40px;
  width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.mega-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px 22px}
.mega-link{display:flex;gap:13px;align-items:center;padding:10px;border-radius:var(--radius-sm);
  transition:background var(--t)}
.mega-link:hover{background:var(--brand-soft)}
.mega-thumb{width:62px;height:48px;border-radius:8px;overflow:hidden;background:var(--paper-3);flex:none}
.mega-thumb img{width:100%;height:100%;object-fit:cover}
.mega-link h4{font-size:14.5px;margin-bottom:3px;line-height:1.3}
.mega-link p{font-size:12.2px;color:var(--ink-400);line-height:1.4}
.mega-side{background:var(--ink-900);border-radius:var(--radius);padding:26px 24px;color:#C6D0DA}
.mega-side h4{color:#fff;font-size:17px;margin-bottom:9px}
.mega-side p{font-size:13.5px;line-height:1.6;color:var(--ink-300);margin-bottom:18px}
.mega-side .btn{width:100%}

/* ---------- 23. 方案板块（关键词 H2 + 3 图文卡）---------- */
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.sol{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.sol:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--brand-100)}
.sol-media{aspect-ratio:4/3;overflow:hidden;background:var(--paper-3);position:relative}
.sol-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.sol:hover .sol-media img{transform:scale(1.06)}
.sol-tag{position:absolute;left:14px;top:14px;background:rgba(10,22,34,.78);color:#fff;
  font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  padding:5px 11px;border-radius:99px;backdrop-filter:blur(6px)}
.sol-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.sol-body h3{font-size:19px;margin-bottom:10px;line-height:1.3}
.sol-body p{font-size:14.6px;color:var(--ink-500);line-height:1.62;margin-bottom:16px}
.sol-body .link-arrow{margin-top:auto;font-size:14px}
.section--ink .sol{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.1)}
.section--ink .sol-body h3{color:#fff}
.section--ink .sol-body p{color:var(--ink-300)}

/* ---------- 24. 产品矩阵加图 ---------- */
.pm{padding:0;overflow:hidden;display:flex;flex-direction:column}
.pm-media{aspect-ratio:16/11;background:var(--paper-3);overflow:hidden}
.pm-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.pm:hover .pm-media img{transform:scale(1.06)}
.pm-body{padding:20px 20px 22px}
.pm-body .pm-series{margin-bottom:11px}

/* ---------- 25. 视频门面 + 公司简介 ---------- */
.mfr-grid{display:grid;grid-template-columns:1fr 1.08fr;gap:56px;align-items:center}
.mfr-copy p{font-size:16px;color:var(--ink-500);line-height:1.8;margin-bottom:17px}
.mfr-copy strong{color:var(--ink-800);font-weight:700}
.video-facade{position:relative;border-radius:var(--radius-lg);overflow:hidden;
  aspect-ratio:16/9;background:var(--ink-900);display:block;box-shadow:var(--shadow-lg)}
.video-facade img{width:100%;height:100%;object-fit:cover;opacity:.82;transition:transform .6s ease,opacity var(--t)}
.video-facade:hover img{transform:scale(1.04);opacity:.95}
.video-facade::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,16,26,.15),rgba(6,16,26,.55))}
.video-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;
  width:76px;height:76px;border-radius:50%;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;box-shadow:0 12px 34px rgba(0,160,224,.5);
  transition:transform var(--t),background var(--t)}
.video-facade:hover .video-play{transform:translate(-50%,-50%) scale(1.09);background:var(--brand-600)}
.video-play svg{width:26px;height:26px;margin-left:4px}
.video-label{position:absolute;left:22px;bottom:20px;z-index:2;color:#fff}
.video-label strong{display:block;font-size:16.5px;font-weight:800;margin-bottom:3px}
.video-label span{font-size:13px;color:rgba(255,255,255,.8)}

/* ---------- 26. Why Choose（6 条编号）---------- */
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.why{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 28px 30px;transition:box-shadow var(--t),transform var(--t),border-color var(--t)}
.why:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:var(--brand-100)}
.why-head{display:flex;align-items:center;gap:14px;margin-bottom:14px;
  padding-bottom:14px;border-bottom:1px solid var(--line-soft)}
.why-no{width:38px;height:38px;border-radius:10px;background:var(--brand-soft);color:var(--brand-700);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;flex:none}
.why-head h3{font-size:18px;line-height:1.3}
.why p{font-size:14.8px;color:var(--ink-500);line-height:1.68}

/* ---------- 27. Knowledge Hub ---------- */
.ins-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.ins{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t)}
.ins:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.ins-media{aspect-ratio:16/9;overflow:hidden;background:var(--paper-3)}
.ins-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.ins:hover .ins-media img{transform:scale(1.06)}
.ins-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.ins-cat{font-size:11.5px;font-weight:800;letter-spacing:.09em;text-transform:uppercase;
  color:var(--brand-700);margin-bottom:10px}
.ins-body h3{font-size:17px;line-height:1.38;margin-bottom:10px}
.ins-body p{font-size:14px;color:var(--ink-500);line-height:1.6;margin-bottom:16px}
.ins-body .link-arrow{margin-top:auto;font-size:14px}

/* ---------- 28. V3 响应式 ---------- */
@media (max-width:1080px){
  .mega{display:none}
  .mfr-grid{grid-template-columns:1fr;gap:36px}
  .sol-grid,.ins-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  .why-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .sol-grid,.ins-grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  .pm-body{padding:14px 14px 16px}
  .why{padding:22px 20px 24px}
  .video-play{width:60px;height:60px}
  .video-play svg{width:21px;height:21px}
}