/* ===== Fonts ===== */
@font-face{font-family:'AlibabaPuHuiTi';src:url('https://cdn.jsdelivr.net/npm/c1-alibaba-puhui-ti/fonts/AlibabaPuHuiTi-3-35-Thin.woff2') format('woff2');font-weight:300;font-display:swap}
@font-face{font-family:'AlibabaPuHuiTi';src:url('https://cdn.jsdelivr.net/npm/c1-alibaba-puhui-ti/fonts/AlibabaPuHuiTi-3-55-Regular.woff2') format('woff2');font-weight:400;font-display:swap}
/* Medium weight not available in the c1-alibaba-puhui-ti package */
/* @font-face{font-family:'AlibabaPuHuiTi';src:url('https://cdn.jsdelivr.net/npm/c1-alibaba-puhui-ti/fonts/AlibabaPuHuiTi-3-65-Medium.woff2') format('woff2');font-weight:500;font-display:swap} */
@font-face{font-family:'AlibabaPuHuiTi';src:url('https://cdn.jsdelivr.net/npm/c1-alibaba-puhui-ti/fonts/AlibabaPuHuiTi-3-85-Bold.woff2') format('woff2');font-weight:700;font-display:swap}

/* ===== Reset & Base ===== */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:'AlibabaPuHuiTi','PingFang SC','Hiragino Sans GB','Microsoft YaHei UI',sans-serif;background:var(--bg-body);color:var(--text);line-height:1.7;font-size:19px;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 32px}

/* ===== Animations ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(36px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes pulseGlow{0%,100%{box-shadow:0 0 20px rgba(255,255,255,.05)}50%{box-shadow:0 0 40px rgba(255,255,255,.08)}}
@keyframes countUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes shimmer{0%{background-position:-200% center}100%{background-position:200% center}}
@keyframes slideIn{from{opacity:0;transform:translateX(-30px)}to{opacity:1;transform:translateX(0)}}
@keyframes scaleIn{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}

.anim-fade-up{opacity:0;transform:translateY(36px);transition:all .7s cubic-bezier(.22,1,.36,1)}
.anim-fade-up.visible{opacity:1;transform:translateY(0)}
.anim-scale{opacity:0;transform:scale(.92);transition:all .7s cubic-bezier(.22,1,.36,1)}
.anim-scale.visible{opacity:1;transform:scale(1)}
.anim-slide{opacity:0;transform:translateX(-30px);transition:all .7s cubic-bezier(.22,1,.36,1)}
.anim-slide.visible{opacity:1;transform:translateX(0)}

/* ===== Design System ===== */
:root{
  --brand:#1E293B;
  --brand-2:#0F172A;
  --accent:#6B7280;
  --accent-dark:#4B5563;
  --accent-light:#D1D5DB;
  --accent-subtle:rgba(107,114,128,.07);
  --accent-border:rgba(107,114,128,.14);
  --bg-warm:#F7F3EE;
  --bg-cool:#F8FAFC;
  --bg-body:#fff;
  --bg-section-2:#EDEFF2;
  --bg-white:#fff;
  --btn-text:#fff;
  --heading-text:var(--brand);
  --border:#E2E8F0;
  --border-subtle:rgba(0,0,0,.06);
  --text:#1a1a2e;
  --text-secondary:#475569;
  --text-muted:#94A3B8;
  --glass-bg:rgba(255,255,255,.04);
  --glass-border:rgba(255,255,255,.08);
  --shadow-sm:0 1px 2px rgba(0,0,0,.04),0 1px 4px rgba(0,0,0,.02);
  --shadow-md:0 4px 16px rgba(0,0,0,.05),0 1px 4px rgba(0,0,0,.03);
  --shadow-lg:0 12px 40px rgba(0,0,0,.07),0 2px 8px rgba(0,0,0,.03);
  --shadow-xl:0 24px 64px rgba(0,0,0,.09),0 4px 12px rgba(0,0,0,.04);
  --radius:12px;
  --radius-lg:16px;
  --radius-xl:20px;
}

/* ===== 主题色（默认黑白灰，可切换红/蓝/绿/橙背景） ===== */
html[data-theme="red"]{
  --brand:#B91C1C; --brand-2:#7F1D1D;
  --accent:#DC2626; --accent-dark:#B91C1C; --accent-light:#FCA5A5;
  --accent-subtle:rgba(220,38,38,.08); --accent-border:rgba(220,38,38,.18);
  --bg-body:#FEF2F2; --bg-cool:#FDE8E8; --bg-section-2:#FBD5D5;
  --text:#3B1717; --text-secondary:#7C3D3D; --text-muted:#A88282;
}
html[data-theme="blue"]{
  --brand:#40A0FF; --brand-2:#1E6FD9;
  --accent:#6BB8FF; --accent-dark:#40A0FF; --accent-light:#A8D4FF;
  --accent-subtle:rgba(64,160,255,.08); --accent-border:rgba(64,160,255,.18);
  --bg-body:#FFFFFF; --bg-cool:#F5F9FF; --bg-section-2:#EAF3FF;
  --bg-white:#FFFFFF;
  --text:#0F172A; --text-secondary:#475569; --text-muted:#94A3B8;
  --btn-text:#0B2A4A;
  --heading-text:#0B2A4A;
  --border:#E2E8F0; --border-subtle:rgba(0,0,0,.05);
  --footer-bg:#0D47A1;
  --nav-bg-scrolled:rgba(255,255,255,.96); --nav-bg-mobile:rgba(255,255,255,.98);
  --glass-bg:rgba(255,255,255,.04); --glass-border:rgba(255,255,255,.08);
}
/* 蓝色主题专属：主体浅色，hero/视频/页脚保持深色 */
html[data-theme="blue"] .hero{background:linear-gradient(165deg,#070A10 0%,#0B101A 45%,#0F1522 100%)}
html[data-theme="blue"] .vbanner{background:linear-gradient(165deg,#070A10 0%,#0B101A 60%,#0D1118 100%)}
html[data-theme="blue"] footer{background:var(--footer-bg);border-top:1px solid rgba(255,255,255,.06)}
/* 页脚文字提亮（深蓝底可读性） */
html[data-theme="blue"] footer .ft-links a,
html[data-theme="blue"] footer .ft-meta,
html[data-theme="blue"] footer .ft-tag,
html[data-theme="blue"] footer .fts-h,
html[data-theme="blue"] footer .fts-b a{color:rgba(255,255,255,.88)}
html[data-theme="blue"] footer .ft-links a:hover,
html[data-theme="blue"] footer .fts-b a:hover{color:#fff}
html[data-theme="blue"] footer .ft-icp{color:rgba(255,255,255,.7)}
html[data-theme="blue"] .cf-cb:hover{background:var(--accent-subtle)}
/* 留白 */
html[data-theme="blue"] section{padding:140px 0}
html[data-theme="blue"] .sec-header{margin-bottom:84px}
html[data-theme="blue"] .prod-grid,.sf-grid,.adv-grid,.dl-grid{gap:32px}
html[data-theme="blue"] .scene-grid{gap:36px}
html[data-theme="blue"] .prod-card{padding:48px 40px}
html[data-theme="blue"] .scene-card{padding:60px 48px}
html[data-theme="blue"] .sf-card{padding:52px 40px}
html[data-theme="blue"] .adv-card{padding:46px 38px}
html[data-theme="blue"] .chall-card{padding:44px 34px}
html[data-theme="blue"] .contact-box{padding:56px 52px}
@media(max-width:768px){html[data-theme="blue"] section{padding:80px 0}}
/* 蓝色光晕 hover */
html[data-theme="blue"] .prod-card:hover,
html[data-theme="blue"] .scene-card:hover,
html[data-theme="blue"] .sf-card:hover,
html[data-theme="blue"] .adv-card:hover,
html[data-theme="blue"] .chall-card:hover,
html[data-theme="blue"] .dl-card:hover,
html[data-theme="blue"] .case-card:hover,
html[data-theme="blue"] .cb-card:hover,
html[data-theme="blue"] .cb-mini:hover,
html[data-theme="blue"] .cb-flow .f-node:hover,
html[data-theme="blue"] .cb-dir .d-item:hover,
html[data-theme="blue"] .cust-block:hover,
html[data-theme="blue"] .about .about-card:hover{box-shadow:0 14px 44px rgba(64,160,255,.12)}
html[data-theme="green"]{
  --brand:#047857; --brand-2:#064E3B;
  --accent:#059669; --accent-dark:#047857; --accent-light:#6EE7B7;
  --accent-subtle:rgba(5,150,105,.08); --accent-border:rgba(5,150,105,.18);
  --bg-body:#ECFDF5; --bg-cool:#D1FAE5; --bg-section-2:#A7F3D0;
  --text:#0F2E22; --text-secondary:#31634F; --text-muted:#7FA393;
}
html[data-theme="orange"]{
  --brand:#C2410C; --brand-2:#7C2D12;
  --accent:#EA580C; --accent-dark:#C2410C; --accent-light:#FDBA74;
  --accent-subtle:rgba(234,88,12,.08); --accent-border:rgba(234,88,12,.18);
  --bg-body:#FFF7ED; --bg-cool:#FFEDD5; --bg-section-2:#FED7AA;
  --text:#3B2210; --text-secondary:#7C5530; --text-muted:#A88F75;
}
html[data-theme="purple"]{
  --brand:#8B5CF6; --brand-2:#6D28D9;
  --accent:#A78BFA; --accent-dark:#8B5CF6; --accent-light:#C4B5FD;
  --accent-subtle:rgba(167,139,250,.08); --accent-border:rgba(167,139,250,.18);
  --bg-body:#F5F3FF; --bg-cool:#EDE9FE; --bg-section-2:#DDD6FE;
  --text:#2E1065; --text-secondary:#6D5BA8; --text-muted:#9B8AC0;
}
html[data-theme="yellow"]{
  --brand:#EAB308; --brand-2:#A16207;
  --accent:#FACC15; --accent-dark:#EAB308; --accent-light:#FDE047;
  --accent-subtle:rgba(250,204,21,.08); --accent-border:rgba(250,204,21,.18);
  --bg-body:#FEFCE8; --bg-cool:#FEF9C3; --bg-section-2:#FEF08A;
  --text:#422006; --text-secondary:#854D0E; --text-muted:#A79C4E;
  --btn-text:#713F12;
  --heading-text:#713F12;
}

/* ===== Nav Base ===== */
nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:all .4s cubic-bezier(.22,1,.36,1);padding:0;background:rgba(15,23,42,.45);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent}
nav.scrolled{background:var(--nav-bg-scrolled, rgba(255,255,255,.96));backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);box-shadow:0 1px 0 var(--border)}
.nav-inner{display:flex;align-items:center;height:72px;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-logo .icon{width:36px;height:36px;border-radius:8px;overflow:hidden;flex-shrink:0;line-height:0}
.nav-logo .icon svg{display:block;width:100%;height:100%}
.nav-logo .name{font-size:20px;font-weight:700;color:#fff;transition:color .35s}
nav.scrolled .nav-logo .name{color:var(--heading-text)}

/* ===== Mega Menu ===== */
.mega-nav{position:relative}
.mega-nav>a{display:flex;align-items:center;gap:4px}
.mega-nav>a .arrow{font-size:10px;transition:transform .25s;display:inline-block}
.mega-nav:hover>a .arrow{transform:rotate(180deg)}
.mega-drop{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:0 16px 48px rgba(0,0,0,.12);padding:24px;opacity:0;visibility:hidden;transition:all .25s cubic-bezier(.22,1,.36,1);z-index:200;margin-top:8px;min-width:600px}
.mega-nav:hover .mega-drop{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.mega-drop::before{content:'';position:absolute;top:-8px;left:50%;transform:translateX(-50%);width:16px;height:8px;background:var(--bg-white);clip-path:polygon(50% 0,100% 100%,0 100%);border-top:1px solid var(--border)}
.mega-grid{display:grid;gap:4px}
.mega-grid.cols-2{grid-template-columns:1fr 1fr}
.mega-grid.cols-3{grid-template-columns:1fr 1fr 1fr}
.mega-grid.cols-1{grid-template-columns:1fr}
.mega-section{margin-bottom:8px}
.mega-section:last-child{margin-bottom:0}
.mega-section .sec-title{font-size:13px;font-weight:600;color:var(--text-muted);letter-spacing:1.5px;text-transform:uppercase;padding:8px 12px 6px;border-bottom:1px solid var(--border);margin-bottom:4px}
.mega-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:8px;text-decoration:none;color:inherit;transition:all .15s}
.mega-item:hover{background:var(--bg-cool)}
.mega-item .mi-ic{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--btn-text);flex-shrink:0;box-shadow:0 2px 8px rgba(30,41,59,.1)}
.mega-item .mi-info{flex:1;min-width:0}
.mega-item .mi-t{font-size:15px;font-weight:600;color:var(--heading-text);display:block;margin-bottom:2px}
.mega-item .mi-d{font-size:13px;color:var(--text-secondary);display:block;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mega-divider{width:1px;background:var(--border);margin:0 4px}

/* Nav Desktop */
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links>a{padding:8px 14px;border-radius:8px;color:rgba(255,255,255,.75);font-size:15px;font-weight:500;transition:all .25s;position:relative;letter-spacing:.2px}
nav.scrolled .nav-links>a{color:var(--text-secondary)}
.nav-links>a:hover{background:rgba(255,255,255,.08);color:#fff}
nav.scrolled .nav-links>a:hover{background:var(--bg-cool);color:var(--heading-text)}
.nav-links>a::after{content:'';position:absolute;bottom:4px;left:50%;transform:translateX(-50%) scaleX(0);width:calc(100% - 28px);height:2px;background:var(--brand);border-radius:2px;transition:transform .25s}
nav.scrolled .nav-links>a::after{background:var(--accent)}
.nav-links>a:hover::after{transform:translateX(-50%) scaleX(1)}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-tel{display:flex;align-items:center;gap:6px;color:var(--accent-light);font-size:16px;font-weight:600;white-space:nowrap;transition:color .35s;letter-spacing:.3px}
nav.scrolled .nav-tel{color:var(--heading-text)}
.nav-tel:hover{color:#fff}
nav.scrolled .nav-tel:hover{color:var(--heading-text)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 26px;border-radius:10px;font-size:15px;font-weight:600;transition:all .3s cubic-bezier(.22,1,.36,1);cursor:pointer;border:none;white-space:nowrap;letter-spacing:.2px}

/* Mobile Toggle */
.mobile-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;z-index:1001}
.mobile-toggle span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}
nav.scrolled .mobile-toggle span{background:var(--brand)}
.btn-primary{background:var(--brand);color:var(--btn-text)}
.btn-primary:hover{background:var(--brand-2);transform:translateY(-2px);box-shadow:0 8px 24px rgba(30,41,59,.3)}
.btn-gold{background:var(--accent);color:var(--btn-text)}
.btn-gold:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(107,114,128,.2)}
.btn-outline{background:transparent;color:var(--heading-text);border:1.5px solid var(--border)}
.btn-outline:hover{border-color:var(--accent);color:var(--heading-text);background:var(--accent-subtle);transform:translateY(-2px)}

/* Nav Login */
.nav-login{display:inline-flex;align-items:center;gap:6px;padding:9px 22px;border-radius:10px;font-size:15px;font-weight:600;color:rgba(255,255,255,.85);border:1.5px solid rgba(255,255,255,.22);transition:all .3s;white-space:nowrap;letter-spacing:.2px}
.nav-login:hover{color:#fff;border-color:rgba(255,255,255,.45);background:rgba(255,255,255,.08);transform:translateY(-1px)}
nav.scrolled .nav-login{color:var(--heading-text);border-color:var(--border)}
nav.scrolled .nav-login:hover{color:var(--heading-text);border-color:var(--accent);background:var(--accent-subtle)}
.only-mobile{display:none}

/* ===== Hero ===== */
.hero{position:relative;padding:140px 0 80px;background:linear-gradient(165deg,#0a0a0f 0%,#111118 35%,#1a1420 65%,#0a0a0f 100%);overflow:hidden;min-height:100vh;display:flex;align-items:center}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 75% 55% at 25% 45%,rgba(255,255,255,.035) 0%,transparent 65%),radial-gradient(ellipse 45% 45% at 75% 55%,rgba(255,255,255,.02) 0%,transparent 55%),radial-gradient(circle 12% at 50% 30%,rgba(255,255,255,.015) 0%,transparent 100%);pointer-events:none}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.018) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.018) 1px,transparent 1px);background-size:56px 56px;pointer-events:none;mask-image:radial-gradient(ellipse 80% 70% at 50% 45%,#000 20%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 45%,#000 20%,transparent 70%)}
.hero .wrap{position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 20px 6px 8px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:100px;font-size:13px;color:rgba(255,255,255,.5);margin-bottom:28px;animation:fadeUp .8s ease both;backdrop-filter:blur(4px);letter-spacing:.3px}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.35);animation:pulseGlow 2s ease-in-out infinite}
.hero h1{font-size:clamp(38px,5vw,64px);font-weight:700;color:#fff;line-height:1.1;letter-spacing:-1.5px;max-width:820px;animation:fadeUp .8s .1s ease both}
.hero h1 .highlight{background:linear-gradient(135deg,#ffffff 0%,rgba(255,255,255,.85) 40%,rgba(255,255,255,.6) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:clamp(17px,1.3vw,20px);color:rgba(255,255,255,.55);max-width:560px;margin-top:22px;line-height:1.8;animation:fadeUp .8s .2s ease both}
.hero-actions{display:flex;gap:14px;margin-top:36px;flex-wrap:wrap;animation:fadeUp .8s .3s ease both}
.hero-actions .btn-primary{background:var(--brand);color:var(--btn-text);padding:14px 36px;font-size:16px;border-radius:12px}
.hero-actions .btn-primary:hover{background:var(--brand-2);box-shadow:0 8px 32px rgba(0,0,0,.4);transform:translateY(-2px)}
.hero-actions .btn-outline{border-color:rgba(255,255,255,.15);color:rgba(255,255,255,.7);padding:14px 36px;font-size:16px;border-radius:12px}
.hero-actions .btn-outline:hover{border-color:rgba(255,255,255,.35);color:#fff;background:rgba(255,255,255,.06);transform:translateY(-2px)}

/* Hero Metrics Strip */
.hero-metrics{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;margin-top:52px;padding:32px 0;border-top:1px solid rgba(255,255,255,.06);animation:fadeUp .8s .4s ease both}
.hm-item{text-align:center}
.hm-num{font-size:clamp(28px,2.8vw,40px);font-weight:700;color:#fff;line-height:1;letter-spacing:-.5px}
.hm-num .suf{font-size:15px;color:rgba(255,255,255,.4);font-weight:400;margin-left:2px}
.hm-label{font-size:13px;color:rgba(255,255,255,.45);margin-top:8px;font-weight:400;letter-spacing:.3px}
.hm-glow{display:inline-block;background:linear-gradient(135deg,#fff 0%,rgba(255,255,255,.7) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* ===== Hero Bottom CTA Bar ===== */
.hero-cta-bar{position:relative;z-index:2;margin-top:56px;padding:28px 36px;background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius-xl);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px;animation:fadeUp .8s .5s ease both}
.hero-cta-bar .left{display:flex;align-items:center;gap:16px}
.hero-cta-bar .av{width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.05);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.hero-cta-bar .txt{font-size:15px;color:rgba(255,255,255,.65)}
.hero-cta-bar .txt strong{color:#fff;font-weight:600}
.hero-cta-bar .btn{background:var(--accent);color:var(--btn-text);padding:12px 32px;font-size:15px;border-radius:10px}
.hero-cta-bar .btn:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(107,114,128,.18)}

/* ===== Hero 视频轮播 ===== */
.hero-slides{position:relative;width:100%;z-index:2;min-height:78vh;padding:56px 0 60px}
.hero-slide{position:absolute;inset:0;display:flex;align-items:flex-start;justify-content:center;padding-top:56px;box-sizing:border-box;opacity:0;visibility:hidden;transform:translateY(16px);transition:opacity .7s ease,transform .7s ease,visibility .7s;pointer-events:none}
.hero-slide.active{opacity:1;visibility:visible;transform:none;pointer-events:auto}
.hero-slide .wrap{width:100%}
/* 视频页 */
.hero-video-wrap{text-align:center}
.hero-video{position:relative;margin:34px auto 0;max-width:880px;border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.14);box-shadow:0 30px 90px rgba(0,0,0,.55);background:#000}
/* 自定义播放器：视频元素不入 DOM（canvas 渲染），彻底避免 Edge 注入翻译/增强按钮 */
.vp{position:relative;width:100%;background:#000}
.vp-canvas{width:100%;display:block;aspect-ratio:16/9;background:#000;cursor:pointer}
/* 视频未播放时的品牌封面 */
.vp-poster{position:absolute;inset:0;z-index:1;cursor:pointer;overflow:hidden;background:#0B101A}
.vp-poster .vpp-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.85) brightness(.72);transform:scale(1.02)}
.vp-poster .vpp-shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,10,16,.2) 0%,rgba(7,10,16,.05) 45%,rgba(7,10,16,.55) 78%,rgba(7,10,16,.88) 100%)}
.vp-poster .vpp-tag{position:absolute;top:16px;right:16px;padding:5px 14px;border-radius:100px;background:rgba(7,10,16,.55);border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.85);font-size:12px;letter-spacing:2px;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.vp-poster .vpp-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:76px;height:76px;border-radius:50%;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.38);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;font-size:26px;color:#fff;padding-left:5px;box-sizing:border-box;transition:all .3s cubic-bezier(.22,1,.36,1);box-shadow:0 12px 40px rgba(0,0,0,.35)}
.vp-poster:hover .vpp-play{background:#40A0FF;border-color:#40A0FF;transform:translate(-50%,-50%) scale(1.08);box-shadow:0 16px 48px rgba(64,160,255,.4)}
.vp-poster .vpp-brand{position:absolute;left:22px;bottom:18px;display:flex;align-items:center;gap:10px}
.vp-poster .vpp-brand i{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,#40A0FF,#1E6FD9);color:#fff;font-style:normal;font-weight:700;font-size:13px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(30,111,217,.4)}
.vp-poster .vpp-brand b{font-size:15px;font-weight:600;color:#fff}
.vp-poster .vpp-brand span{display:block;font-size:12px;color:rgba(255,255,255,.7);font-weight:400;letter-spacing:.5px}
.vp.playing .vp-poster{display:none}
.vp:fullscreen .vp-canvas{width:100%;height:100%;aspect-ratio:auto;object-fit:contain}
.vp:-webkit-full-screen .vp-canvas{width:100%;height:100%;aspect-ratio:auto;object-fit:contain}
.vp-controls{position:absolute;left:0;right:0;bottom:0;display:flex;align-items:center;gap:12px;padding:12px 16px;background:linear-gradient(180deg,transparent,rgba(0,0,0,.78));opacity:0;transition:opacity .3s;z-index:2;box-sizing:border-box}
.vp:hover .vp-controls,.vp-controls.show{opacity:1}
.vp-btn{background:none;border:none;color:#fff;font-size:14px;cursor:pointer;padding:4px;line-height:1;opacity:.9;font-family:inherit;flex-shrink:0}
.vp-btn:hover{opacity:1}
.vp-progress{flex:1;height:4px;background:rgba(255,255,255,.25);border-radius:2px;cursor:pointer;position:relative;min-width:60px}
.vp-bar{position:absolute;left:0;top:0;bottom:0;width:0;background:#fff;border-radius:2px}
.vp-time{font-size:12px;color:rgba(255,255,255,.85);white-space:nowrap;font-variant-numeric:tabular-nums;flex-shrink:0}
.hero-video-tip{margin-top:16px;font-size:12.5px;color:rgba(255,255,255,.35);letter-spacing:.5px}
/* 产品页标签列表 */
.hero-prod-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px;max-width:660px}
.hero-prod-list span{padding:7px 18px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:100px;font-size:14px;color:rgba(255,255,255,.75);letter-spacing:.3px}
/* 轮播控件 */
.hero-nav{display:flex;align-items:center;justify-content:center;gap:18px;margin-top:34px;position:relative;z-index:5}
.hero-nav-btn{width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);color:#fff;font-size:22px;cursor:pointer;transition:all .25s;display:flex;align-items:center;justify-content:center;line-height:1}
.hero-nav-btn:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.32)}
.hero-dots{display:flex;gap:8px;align-items:center}
.hero-dot{width:8px;height:8px;border-radius:100px;background:rgba(255,255,255,.25);cursor:pointer;transition:all .35s}
.hero-dot.active{width:26px;background:#fff}
.hero-cta-wrap{margin-top:44px;position:relative;z-index:2}
.hero-cta-wrap .hero-cta-bar{margin-top:0;animation:none}

/* ===== 视频管理面板 ===== */
.video-admin{position:fixed;inset:0;z-index:9999;display:none;align-items:center;justify-content:center}
.video-admin.show{display:flex}
.va-overlay{position:absolute;inset:0;background:rgba(0,0,0,.65)}
.va-panel{position:relative;background:var(--bg-white);border-radius:18px;padding:36px;width:480px;max-width:92vw;box-shadow:0 40px 120px rgba(0,0,0,.5);z-index:2;box-sizing:border-box}
.va-panel h3{font-size:20px;font-weight:700;margin:0 0 6px;color:var(--text)}
.va-panel .va-desc{font-size:13px;color:var(--text-muted);margin-bottom:22px}
.va-panel label{display:block;font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:4px}
.va-panel input{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:8px;font-size:14px;margin-bottom:16px;box-sizing:border-box;outline:none;transition:border .2s;background:var(--bg-white);color:var(--text)}
.va-panel input:focus{border-color:var(--heading-text)}
.va-panel .va-btns{display:flex;gap:10px;margin-top:4px}
.va-panel .va-btns button{padding:10px 20px;border-radius:8px;border:none;cursor:pointer;font-size:14px;font-weight:600;transition:all .2s}
#vaSave{background:var(--brand);color:var(--btn-text);flex:1}
#vaSave:hover{background:var(--brand-2)}
#vaReset{background:#f1f5f9;color:var(--text-secondary)}
#vaReset:hover{background:#e2e8f0}
#vaClose{background:transparent;color:var(--text-muted);padding:10px 12px!important}
#vaClose:hover{color:var(--text-secondary)}

/* ===== Section Common ===== */
section{padding:110px 0}
.sec-header{text-align:center;margin-bottom:64px}
.sec-tag{display:inline-flex;align-items:center;gap:6px;padding:4px 14px;background:var(--bg-cool);border:1px solid var(--border);border-radius:100px;font-size:14px;color:var(--text-secondary);font-weight:500;letter-spacing:.8px;text-transform:uppercase;margin-bottom:16px}
.sec-tag.dark{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.08);color:rgba(255,255,255,.5)}
.sec-title{font-size:clamp(30px,3.4vw,42px);font-weight:700;color:var(--heading-text);letter-spacing:-.8px;line-height:1.15}
.sec-title.light{color:#fff}
.sec-desc{font-size:17px;color:var(--text-secondary);max-width:600px;margin:16px auto 0;line-height:1.8}
.sec-desc.light{color:rgba(255,255,255,.5)}

/* ===== About / 企业介绍 ===== */
.about{padding:110px 0;background:var(--bg-body);position:relative;overflow:hidden}
.about p{color:var(--text-secondary);font-size:16px;line-height:1.9;margin-bottom:20px}
.about .lead{font-size:18px;color:var(--text);font-weight:500;margin-bottom:28px}
.about .about-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:48px}
.about .about-card{background:var(--bg-cool);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px 28px;transition:all .3s cubic-bezier(.22,1,.36,1)}
.about .about-card:hover{box-shadow:var(--shadow-md);border-color:var(--accent-light);transform:translateY(-2px)}
.about .about-card .ac-icon{display:flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:14px;background:var(--bg-white);border:1px solid var(--border);box-shadow:0 4px 12px rgba(0,0,0,.04);margin-bottom:18px;transition:all .3s}
.about .about-card .ac-icon svg{width:28px;height:28px;display:block}
.about .about-card:hover .ac-icon{box-shadow:0 10px 24px rgba(0,0,0,.1);transform:translateY(-2px)}
.about .about-card .ac-title{font-size:20px;font-weight:700;color:var(--heading-text);margin-bottom:14px;letter-spacing:2px}
.about .about-card .ac-title .ac-sub{font-size:14px;font-weight:400;color:var(--text-muted);display:block;margin-top:2px;letter-spacing:0}
.about .about-card ul{list-style:none;padding:0;margin:0}
.about .about-card ul li{position:relative;padding:6px 0 6px 20px;font-size:15px;color:var(--text-secondary);line-height:1.6;border-bottom:1px solid var(--border-subtle)}
.about .about-card ul li:last-child{border-bottom:none}
.about .about-card ul li::before{content:'';position:absolute;left:0;top:14px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.about .about-belief{border-left:4px solid var(--brand);background:var(--bg-cool);border-radius:0 var(--radius) var(--radius) 0;padding:28px 32px;margin-top:40px}
.about .about-belief p{font-size:16px;color:var(--text-secondary);margin-bottom:8px;line-height:1.9}
.about .about-belief p:last-child{margin-bottom:0}
.about .about-belief .belief-strong{font-size:18px;color:var(--heading-text);font-weight:600}
@media(max-width:768px){
  .about .about-grid{grid-template-columns:1fr}
  .about .about-belief{padding:20px 24px}
}

/* ===== Culture / 营匠之道 ===== */
.culture{margin-top:56px;background:var(--bg-cool);border:1px solid var(--border);border-radius:var(--radius-xl);padding:56px 44px}
.culture-head{text-align:center;margin-bottom:48px}
.culture-head .ch-tag{font-size:13px;letter-spacing:8px;color:var(--text-muted);font-weight:600;text-transform:uppercase}
.culture-head h3{font-size:clamp(22px,2.4vw,30px);font-weight:800;color:var(--heading-text);margin-top:12px;letter-spacing:1px}
.culture-block{margin-bottom:52px}
.culture-block:last-child{margin-bottom:0}
.cb-title{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.cb-title .cb-n{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:var(--btn-text);font-size:15px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 4px 12px rgba(30,41,59,.15)}
.cb-title .cb-t{font-size:22px;font-weight:700;color:var(--heading-text)}
.cb-title .cb-e{font-size:12px;color:var(--text-muted);letter-spacing:2px;font-weight:400;text-transform:uppercase;margin-left:2px}
.about .cb-lead{font-size:17px;color:var(--text);font-weight:500;line-height:1.9;margin-bottom:16px}
.cb-mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:16px}
.cb-mini{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;text-align:center;transition:all .3s}
.cb-mini:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.cb-mini .m-ic{font-size:22px;display:block;margin-bottom:8px}
.cb-mini .m-ic svg{width:22px;height:22px;display:inline-block;vertical-align:middle;color:var(--heading-text)}
.cb-mini .m-t{font-size:16px;font-weight:600;color:var(--heading-text);margin-bottom:6px;display:block}
.cb-mini p{font-size:13.5px;color:var(--text-secondary);line-height:1.7;margin:0}
.cb-grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cb-grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cb-card{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);padding:24px 22px;transition:all .3s}
.cb-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.cb-card .c-ic{font-size:24px;display:block;margin-bottom:12px}
.cb-card .c-ic svg{width:24px;height:24px;display:block;color:var(--heading-text)}
.cb-card .c-t{font-size:17px;font-weight:700;color:var(--heading-text);margin-bottom:10px;display:block}
.cb-card .c-strong{display:block;font-size:15px;font-weight:600;color:var(--text);margin-bottom:8px;line-height:1.7}
.cb-card p{font-size:14px;color:var(--text-secondary);line-height:1.8;margin:0}
.cb-flow{display:flex;align-items:stretch;gap:0;margin-top:20px;flex-wrap:wrap}
.cb-flow .f-node{flex:1;min-width:132px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);padding:20px 14px;text-align:center;position:relative;transition:all .3s}
.cb-flow .f-node:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.cb-flow .f-node .f-ic{font-size:26px;display:block;margin-bottom:8px}
.cb-flow .f-node .f-ic svg{width:26px;height:26px;display:inline-block;vertical-align:middle;color:var(--heading-text)}
.cb-flow .f-node .f-t{font-size:15px;font-weight:700;color:var(--heading-text);display:block;margin-bottom:4px}
.cb-flow .f-node p{font-size:12.5px;color:var(--text-muted);line-height:1.6;margin:0}
.cb-flow .f-arrow{flex-shrink:0;display:flex;align-items:center;padding:0 6px;color:var(--heading-text);font-size:15px;font-weight:700}
.cb-dir{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cb-dir .d-item{display:flex;align-items:center;gap:14px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;transition:all .3s}
.cb-dir .d-item:hover{box-shadow:var(--shadow-md)}
.cb-dir .d-from{font-size:14px;color:var(--text-secondary);flex:1}
.cb-dir .d-from b{display:block;font-size:17px;color:var(--text);margin-top:4px}
.cb-dir .d-arrow{font-size:20px;color:var(--heading-text);font-weight:800;flex-shrink:0}
.cb-dir .d-to{font-size:14px;color:var(--text-secondary);flex:1}
.cb-dir .d-to b{display:block;font-size:17px;color:var(--heading-text);margin-top:4px}
@media(max-width:1024px){
  .about .about-grid{grid-template-columns:repeat(2,1fr)}
  .cb-grid4{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .culture{padding:36px 20px}
  .cb-mini-grid,.cb-grid3,.cb-grid4,.cb-dir{grid-template-columns:1fr}
  .cb-flow{flex-direction:column;align-items:stretch}
  .cb-flow .f-arrow{transform:rotate(90deg);justify-content:center;padding:4px 0}
}

/* ===== Challenges ===== */
.challenges{background:var(--bg-cool);padding:90px 0}
.chall-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.chall-card{border:1px solid var(--border);border-radius:var(--radius-xl);padding:36px 28px;background:var(--bg-white);transition:all .4s cubic-bezier(.22,1,.36,1);text-align:center}
.chall-card:hover{box-shadow:var(--shadow-lg);border-color:var(--accent-border);transform:translateY(-4px);background:var(--bg-white)}
.chall-icon{width:56px;height:56px;border-radius:14px;background:var(--accent-subtle);border:1px solid var(--accent-border);display:flex;align-items:center;justify-content:center;margin:0 auto 18px;font-size:26px;transition:all .3s}
.chall-card:hover .chall-icon{background:var(--brand);border-color:var(--brand);color:var(--btn-text);transform:scale(1.05)}
.chall-card h3{font-size:17px;font-weight:700;color:var(--heading-text);margin-bottom:8px}
.chall-card p{font-size:15px;color:var(--text-secondary);line-height:1.7}

/* ===== Solution Overview ===== */
.solution-flow{background:var(--bg-body);padding:110px 0}
.sf-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.sf-card{position:relative;padding:44px 34px;border:1px solid var(--border);border-radius:var(--radius-xl);transition:all .4s cubic-bezier(.22,1,.36,1);background:var(--bg-white)}
.sf-card:hover{box-shadow:var(--shadow-lg);border-color:var(--accent-border);transform:translateY(-4px)}
.sf-card .num{position:absolute;top:20px;right:24px;font-size:48px;font-weight:700;color:rgba(107,114,128,.05);line-height:1;font-style:italic}
.sf-card .ic{width:52px;height:52px;border-radius:14px;background:var(--bg-cool);display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:24px;box-shadow:0 4px 12px rgba(30,41,59,.08)}
.sf-card .ic.ic-blue{background:#DBEAFE}
.sf-card .ic.ic-cyan{background:#CFFAFE}
.sf-card .ic.ic-green{background:#D1FAE5}
.sf-card .ic.ic-amber{background:#FEF3C7}
.sf-card .ic.ic-violet{background:#EDE9FE}
.sf-card .ic.ic-rose{background:#FFE4E6}
.sf-card h3{font-size:19px;font-weight:700;color:var(--heading-text);margin-bottom:10px}
.sf-card p{font-size:15px;color:var(--text-secondary);line-height:1.8}
.sf-card .tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:18px}
.sf-card .tags span{padding:4px 12px;background:var(--bg-cool);border:1px solid var(--border);border-radius:6px;font-size:12px;color:var(--text-secondary);font-weight:500}

/* ===== 解决方案图标动画 ===== */
.sf-card .ic svg{width:26px;height:26px;display:block;overflow:visible}
.sf-card .ic svg *{vector-effect:non-scaling-stroke}
/* 01 卡车：车身浮动 + 车轮转动 */
@keyframes sf-truck{0%,100%{transform:translateY(0)}50%{transform:translateY(-1.2px)}}
.sf-truck-body{animation:sf-truck 2.4s ease-in-out infinite}
@keyframes sf-spin{to{transform:rotate(360deg)}}
.sf-wheel{transform-box:fill-box;transform-origin:center;animation:sf-spin 2.4s linear infinite}
.sf-wheel.w2{animation-duration:2.4s}
/* 02 文档：对勾循环描画 */
@keyframes sf-check{0%,15%{stroke-dashoffset:11}55%,85%{stroke-dashoffset:0}100%{stroke-dashoffset:11}}
.sf-doc-check{stroke-dasharray:11;stroke-dashoffset:11;animation:sf-check 3s ease-in-out infinite}
/* 03 箱子：轻微浮动 */
@keyframes sf-box{0%,100%{transform:translateY(0)}50%{transform:translateY(-1.5px)}}
.sf-box-body{animation:sf-box 2.6s ease-in-out infinite}
/* 04 柱状图：逐根生长 */
@keyframes sf-bar{0%,8%{transform:scaleY(.1)}35%,70%{transform:scaleY(1)}92%,100%{transform:scaleY(.1)}}
.sf-bar{transform-box:fill-box;transform-origin:bottom center;animation:sf-bar 2.8s ease-in-out infinite}
.sf-bar.b2{animation-delay:.18s}
.sf-bar.b3{animation-delay:.36s}
/* 05 手机：消息依次弹出 */
@keyframes sf-msg{0%,10%{opacity:0;transform:translateY(2px) scale(.7)}30%,60%{opacity:1;transform:translateY(0) scale(1)}85%,100%{opacity:0;transform:translateY(-1px) scale(.85)}}
.sf-msg{transform-box:fill-box;transform-origin:center;animation:sf-msg 3.2s ease-in-out infinite}
.sf-msg.m2{animation-delay:1s}
/* 06 折线：循环描画 + 端点脉冲 */
@keyframes sf-draw{0%,12%{stroke-dashoffset:24}55%,85%{stroke-dashoffset:0}100%{stroke-dashoffset:24}}
.sf-line{stroke-dasharray:24;stroke-dashoffset:24;animation:sf-draw 3s ease-in-out infinite}
@keyframes sf-dot{0%,12%{opacity:0}55%,85%{opacity:1}100%{opacity:0}}
.sf-dot{animation:sf-dot 3s ease-in-out infinite}
@media (prefers-reduced-motion: reduce){
  .sf-card .ic svg *{animation:none!important}
}

/* ===== Products ===== */
.products{background:linear-gradient(180deg,var(--bg-cool) 0%,var(--bg-body) 100%);padding:110px 0}
.prod-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.prod-card{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-xl);padding:36px 32px;transition:all .4s cubic-bezier(.22,1,.36,1);display:block;text-decoration:none;color:inherit}
.prod-card:hover{box-shadow:var(--shadow-lg);border-color:var(--accent-border);transform:translateY(-4px)}
.prod-card.core{border:2px solid var(--accent-border);background:linear-gradient(135deg,var(--bg-white) 0%,var(--accent-subtle) 100%);position:relative}
.prod-card.core .core-badge{position:absolute;top:-1px;right:24px;padding:3px 14px;background:var(--accent);color:var(--btn-text);font-size:11px;font-weight:600;border-radius:0 0 8px 8px;letter-spacing:1px}
.prod-card .order{font-size:12px;color:var(--text-muted);font-weight:600;letter-spacing:2px;margin-bottom:4px}
.prod-card .pc-top{display:flex;align-items:flex-start;gap:16px;margin-bottom:20px}
.prod-card .pc-ic{width:48px;height:48px;border-radius:14px;background:var(--bg-cool);display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--heading-text);flex-shrink:0;box-shadow:0 4px 12px rgba(0,0,0,.04);animation:pc-float 3s ease-in-out infinite}
/* Staggered float delays for each card */
.prod-card:nth-child(1) .pc-ic{animation-delay:0s}
.prod-card:nth-child(2) .pc-ic{animation-delay:.15s}
.prod-card:nth-child(3) .pc-ic{animation-delay:.3s}
.prod-card:nth-child(4) .pc-ic{animation-delay:.45s}
.prod-card:nth-child(5) .pc-ic{animation-delay:.6s}
.prod-card:nth-child(6) .pc-ic{animation-delay:.75s}
.prod-card:nth-child(7) .pc-ic{animation-delay:.9s}
/* Hover: invert to dark gradient */
.prod-card:hover .pc-ic{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:var(--btn-text);box-shadow:0 8px 24px rgba(30,41,59,.18);animation-duration:1.2s}

@keyframes pc-float{
  0%,100%{transform:translateY(0);box-shadow:0 4px 12px rgba(0,0,0,.04)}
  50%{transform:translateY(-5px);box-shadow:0 8px 24px rgba(0,0,0,.08)}
}
.prod-card .pc-info{flex:1}
.prod-card h3{font-size:19px;font-weight:700;color:var(--heading-text);margin-bottom:4px}
.prod-card .brief{font-size:14px;color:var(--text-secondary);line-height:1.6;margin:0}
.prod-card .pc-feats{display:flex;flex-direction:column;gap:10px}
.prod-card .pf-item{display:flex;align-items:flex-start;gap:10px;padding:10px 14px;background:var(--bg-cool);border:1px solid var(--border);border-radius:8px;transition:all .25s}
.prod-card:hover .pf-item{border-color:var(--accent-border);background:var(--accent-subtle)}
.prod-card .pf-item .pi{font-size:16px;width:22px;height:22px;border-radius:6px;background:var(--accent-subtle);display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}
.prod-card .pf-item .pd{flex:1}
.prod-card .pf-item .pd strong{font-size:14px;color:var(--heading-text);display:block;margin-bottom:2px;font-weight:600}
.prod-card .pf-item .pd span{font-size:13px;color:var(--text-secondary);line-height:1.5;display:block}
.prod-card .pc-more{display:flex;align-items:center;gap:6px;margin-top:14px;font-size:13px;color:var(--heading-text);font-weight:600;transition:all .3s}
.prod-card:hover .pc-more{color:var(--heading-text);gap:10px}
.prod-card .pc-more .ar{transition:transform .3s}
.prod-card:hover .pc-more .ar{transform:translateX(6px)}

/* 产品能力标签 */
.prod-card .pc-tags{display:flex;flex-wrap:wrap;gap:8px;margin:-4px 0 18px}
.prod-card .pc-tag{font-size:12px;padding:3px 12px;border-radius:100px;background:var(--accent-subtle);border:1px solid var(--accent-border);color:var(--heading-text);font-weight:500;transition:all .25s}
.prod-card:hover .pc-tag{border-color:var(--accent);color:var(--heading-text)}
/* 产品卡片截图 */
.prod-card .pc-img{width:100%;margin-bottom:18px;border-radius:10px;overflow:hidden;border:1px solid var(--border);line-height:0}
.prod-card .pc-img img{width:100%;display:block;aspect-ratio:16/9;object-fit:cover;transition:transform .5s}
.prod-card:hover .pc-img img{transform:scale(1.04)}
/* 宽版卡片（末位产品占满整行） */
.prod-card.wide{grid-column:span 2}
.prod-card.wide .pc-feats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}

/* ===== 营匠APP 展示 ===== */
.app-showcase{background:var(--bg-body);padding:110px 0}
.app-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:8px}
.app-item{text-align:center}
.phone{width:236px;max-width:100%;margin:0 auto;border-radius:30px;border:7px solid #1A1F2E;background:#fff;box-shadow:0 24px 64px rgba(15,23,42,.16);overflow:hidden;transition:all .4s cubic-bezier(.22,1,.36,1);position:relative}
.phone-bar{height:26px;background:#1A1F2E;display:flex;align-items:center;justify-content:center;position:relative}
.phone-bar::after{content:'';width:76px;height:14px;border-radius:100px;background:#0B0F16}
.phone img{display:block;width:100%;aspect-ratio:9/19.3;object-fit:cover;object-position:top;transition:transform .5s}
.app-item:hover .phone{transform:translateY(-10px);box-shadow:0 36px 88px rgba(64,160,255,.22)}
.app-item:hover .phone img{transform:scale(1.03)}
.app-item h3{font-size:17px;font-weight:700;color:var(--heading-text);margin:20px 0 6px}
.app-item p{font-size:13px;color:var(--text-secondary);line-height:1.7;margin:0 auto;max-width:230px}
@media(max-width:1024px){
  .app-grid{grid-template-columns:repeat(2,1fr);gap:36px}
}
@media(max-width:560px){
  .app-grid{grid-template-columns:1fr}
  .phone{width:220px}
}

/* ===== 小程序展示 ===== */
.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:8px}
@media(max-width:1024px){
  .mini-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:560px){
  .mini-grid{grid-template-columns:1fr}
}

/* ===== 营匠ERP 卡片内 APP 展示区（高级排版） ===== */
.prod-card.core.erp-app{grid-column:span 2;overflow:hidden}
.erp-layout{display:grid;grid-template-columns:1.12fr .88fr;gap:40px;align-items:center}
.erp-app-show{position:relative;border-radius:18px;min-height:440px;background:linear-gradient(160deg,#0B101A 0%,#111C30 55%,#16263F 100%);overflow:hidden;display:flex;align-items:center;justify-content:center}
.erp-app-show::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 65% 55% at 72% 26%,rgba(64,160,255,.16) 0%,transparent 62%)}
.erp-app-show::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:30px 30px}
.erp-tag{position:absolute;top:14px;left:14px;z-index:4;padding:5px 12px;border-radius:100px;background:rgba(64,160,255,.16);border:1px solid rgba(64,160,255,.35);color:#8CC4FF;font-size:12px;letter-spacing:1px}
.erp-phone{position:absolute;border:5px solid #232B3E;border-radius:20px;background:#fff;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.45)}
.erp-phone .pb{height:22px;background:#232B3E}
.erp-phone img{display:block;width:100%;aspect-ratio:9/19.2;object-fit:cover;object-position:top}
.erp-phone.p-main{width:200px;z-index:3;animation:erpFloatM 5.5s ease-in-out infinite}
.erp-phone.p-s1{width:148px;left:5%;z-index:2;opacity:.95;animation:erpFloatL 5.5s 1.4s ease-in-out infinite;filter:saturate(.92)}
.erp-phone.p-s2{width:148px;right:5%;z-index:2;opacity:.95;animation:erpFloatR 5.5s .7s ease-in-out infinite;filter:saturate(.92)}
.erp-phone.p-s3{width:148px;bottom:8%;left:50%;transform:translateX(-50%);z-index:1;opacity:.78;animation:erpFloatB 5.5s 2.1s ease-in-out infinite;filter:saturate(.85)}
@keyframes erpFloatM{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes erpFloatL{0%,100%{transform:translateY(2px) rotate(-5deg)}50%{transform:translateY(-8px) rotate(-5deg)}}
@keyframes erpFloatR{0%,100%{transform:translateY(4px) rotate(5deg)}50%{transform:translateY(-6px) rotate(5deg)}}
@keyframes erpFloatB{0%,100%{transform:translateX(-50%) translateY(0);opacity:.78}50%{transform:translateX(-50%) translateY(-6px);opacity:.88}}
.erp-app-show:hover .erp-phone.p-main{animation-duration:2.8s}
.erp-app-show:hover .erp-phone.p-s3{animation-duration:2.8s}
.premium-show:hover .erp-phone.p-main{animation-duration:2.8s}
.premium-show:hover .erp-phone.p-s3{animation-duration:2.8s}
@media(max-width:1100px){
  .erp-layout{grid-template-columns:1fr}
  .erp-app-show{min-height:400px;order:-1}
}
@media(max-width:560px){
  .erp-phone.p-main{width:170px}
  .erp-phone.p-s1,.erp-phone.p-s2{width:120px}
}

/* ===== 营匠收银 & 营匠大屏 卡片高级展示 ===== */
.prod-card.premium{grid-column:span 2;overflow:hidden}
.premium-layout{display:grid;grid-template-columns:1.12fr .88fr;gap:40px;align-items:center}
.premium-show{position:relative;border-radius:18px;min-height:380px;background:linear-gradient(160deg,#0B101A 0%,#111C30 55%,#16263F 100%);overflow:hidden;display:flex;align-items:center;justify-content:center}
.premium-show::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 65% 55% at 72% 26%,rgba(64,160,255,.16) 0%,transparent 62%)}
.premium-show::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:30px 30px}
.premium-tag{position:absolute;top:14px;left:14px;z-index:4;padding:5px 12px;border-radius:100px;background:rgba(64,160,255,.16);border:1px solid rgba(64,160,255,.35);color:#8CC4FF;font-size:12px;letter-spacing:1px}
.premium-img{width:82%;border-radius:10px;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.45);border:1px solid rgba(255,255,255,.08);z-index:3;animation:premiumFloat 5.5s ease-in-out infinite}
.premium-img img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}
.premium-show:hover .premium-img{animation-duration:2.8s}
.premium-show:hover .erp-phone.p-main{animation-duration:2.8s}
@keyframes premiumFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@media(max-width:1100px){
  .premium-layout{grid-template-columns:1fr}
  .premium-show{min-height:320px;order:-1}
}

/* 匠行 桌面截图叠放 */
.js-main{width:72%;margin-left:-15%;border-radius:10px;overflow:hidden;box-shadow:0 20px 50px rgba(0,0,0,.45);border:1px solid rgba(255,255,255,.08);z-index:3;animation:premiumFloat 5.5s ease-in-out infinite}
.js-main img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;object-position:top}
.js-sub{position:absolute;right:3%;bottom:12%;width:44%;z-index:4;border-radius:8px;overflow:hidden;box-shadow:0 16px 40px rgba(0,0,0,.55);border:1px solid rgba(255,255,255,.12);animation:premiumFloat 5.5s 1.3s ease-in-out infinite}
.js-sub img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;object-position:top}
.premium-show:hover .js-main{animation-duration:2.8s}
.premium-show:hover .js-sub{animation-duration:2.8s}
@media(max-width:560px){
  .js-main{width:94%;margin-left:0}
  .js-sub{display:none}
}

/* ===== 单立方 · 非标单据引擎 ===== */
.danlifang{background:var(--bg-cool);padding:110px 0;position:relative;overflow:hidden}
.danlifang .wrap{position:relative;z-index:2}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.dl-card{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 24px;transition:all .3s}
.dl-card:hover{box-shadow:var(--shadow-md);border-color:var(--accent-border);transform:translateY(-3px)}
.dl-card .dl-ic{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--btn-text);margin-bottom:14px}
.dl-card h4{font-size:17px;font-weight:700;color:var(--heading-text);margin-bottom:8px}
.dl-card p{font-size:14px;color:var(--text-secondary);line-height:1.8;margin:0}
.dl-card .dl-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px;padding-top:12px;border-top:1px solid var(--border)}
.dl-card .dl-tag{font-size:12px;color:var(--heading-text);background:var(--accent-subtle);border:1px solid var(--accent-border);border-radius:6px;padding:2px 10px}
@media(max-width:768px){
  .dl-grid{grid-template-columns:1fr}
}

/* ===== Scenarios ===== */
.scenarios{background:var(--bg-cool);padding:110px 0;position:relative;overflow:hidden}
.scenarios::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 80% 50% at 50% 0%,rgba(107,114,128,.025) 0%,transparent 70%);pointer-events:none}
.scenarios .wrap{position:relative;z-index:2}
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.scene-card{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-xl);padding:48px 40px;transition:all .4s cubic-bezier(.22,1,.36,1);box-shadow:var(--shadow-sm)}
.scene-card:hover{border-color:var(--accent-border);box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.scene-card .badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:100px;font-size:14px;font-weight:600;margin-bottom:18px}
.scene-card .badge.green{background:var(--accent-subtle);border:1px solid var(--accent-border);color:var(--heading-text)}
.scene-card .badge.blue{background:#eef2ff;border:1px solid #e0e7ff;color:#4f46e5}
.scene-card h3{font-size:22px;font-weight:700;color:var(--heading-text);margin-bottom:10px;letter-spacing:-.3px}
.scene-card .desc{font-size:15px;color:var(--text-secondary);line-height:1.8;margin-bottom:28px}
.scene-flow{display:flex;align-items:center;flex-wrap:wrap;gap:4px}
.scene-flow .step{padding:8px 20px;border-radius:8px;background:var(--bg-cool);border:1px solid var(--border);font-size:14px;color:var(--text-secondary);font-weight:500}
.scene-flow .step.ac{background:var(--accent-subtle);border-color:var(--accent-border);color:var(--heading-text)}
.scene-flow .arr{color:var(--border);font-size:16px;padding:0 4px}

/* ===== Customers ===== */
.customers{
  background:linear-gradient(180deg,var(--bg-cool) 0%,#fff 50%);
  padding:120px 0;
  position:relative
}
.cust-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}

/* Card - borderless, shadow-only */
.cust-block{
  background:var(--bg-white);
  border-radius:20px;
  padding:40px 40px 44px;
  transition:all .45s cubic-bezier(.22,1,.36,1);
  box-shadow:0 4px 24px rgba(0,0,0,.04),0 1px 4px rgba(0,0,0,.02);
  position:relative;
  overflow:hidden
}
.cust-block::before{
  content:'';
  position:absolute;
  top:0;left:32px;right:32px;
  height:4px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  border-radius:0 0 4px 4px;
  opacity:.5
}
.cust-block:hover{
  box-shadow:0 24px 80px rgba(0,0,0,.07),0 8px 24px rgba(0,0,0,.04);
  transform:translateY(-5px)
}
.cust-block:hover::before{opacity:.8}

/* Header */
.cust-head{
  display:flex;
  align-items:center;
  gap:16px;
  margin-bottom:28px;
  padding-bottom:24px;
  border-bottom:1px solid var(--border-subtle)
}
.cust-head .ic{
  width:48px;height:48px;
  border-radius:16px;
  background:linear-gradient(135deg,#1E293B,#334155);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;
  color:#fff;
  flex-shrink:0;
  box-shadow:0 8px 24px rgba(30,41,59,.18)
}
.cust-head h3{
  font-size:20px;
  font-weight:700;
  color:#0F172A;
  letter-spacing:-.3px
}

/* Item list - clean divider style */
.cust-types{display:flex;flex-direction:column;gap:0}
.cust-type{
  padding:18px 0;
  border-bottom:1px solid var(--border-subtle);
  transition:all .2s
}
.cust-type:last-child{border-bottom:none}
.cust-type:hover{padding-left:4px}

/* Badge as title with dot prefix */
.cust-type .badge{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  font-weight:600;
  color:var(--text);
  margin-bottom:6px;
  background:none;
  border:none;
  padding:0;
  border-radius:0;
  letter-spacing:0
}
.cust-type .badge::before{
  content:'';
  display:inline-block;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--brand);
  opacity:.35;
  flex-shrink:0
}

/* Description */
.cust-type p{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.7;
  margin:0;
  padding-left:18px
}

/* ===== Advantages ===== */
.advantages{background:var(--bg-cool);padding:110px 0}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.adv-card{border:1px solid var(--border);border-radius:var(--radius-xl);padding:38px 32px;background:var(--bg-white);transition:all .4s cubic-bezier(.22,1,.36,1)}
.adv-card:hover{box-shadow:var(--shadow-lg);border-color:var(--accent-border);transform:translateY(-4px)}
.adv-card .ic{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:24px;color:var(--btn-text);box-shadow:0 4px 12px rgba(30,41,59,.12)}
.adv-card h4{font-size:18px;font-weight:700;color:var(--heading-text);margin-bottom:8px}
.adv-card p{font-size:15px;color:var(--text-secondary);line-height:1.8}
.adv-card .detail{margin-top:16px;padding-top:14px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted);line-height:1.7}

/* ===== Biz-Fin ===== */
.bizfin{background:var(--bg-cool);padding:110px 0;position:relative;overflow:hidden}
.bizfin::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 60% 50% at 50% 50%,rgba(107,114,128,.02) 0%,transparent 70%);pointer-events:none}
.bizfin .wrap{position:relative;z-index:2}
.bf-flow-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-xl);padding:48px 40px;margin-bottom:32px;box-shadow:var(--shadow-sm)}
.bf-flow-card .subtitle{text-align:center;font-size:14px;color:var(--text-muted);letter-spacing:3px;text-transform:uppercase;margin-bottom:36px;font-weight:600}
.bf-flow{display:flex;align-items:flex-start;justify-content:center;flex-wrap:wrap}
.bf-node{flex:1;text-align:center;padding:0 8px;min-width:80px}
.bf-node .box{width:48px;height:48px;border-radius:14px;background:var(--accent-subtle);border:1px solid var(--accent-border);display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:18px;color:var(--accent-dark);font-weight:700;transition:all .3s}
.bf-flow-card:hover .bf-node .box{background:var(--brand);border-color:var(--brand);color:var(--btn-text)}
.bf-node h5{font-size:14px;font-weight:600;color:var(--brand);margin-bottom:4px}
.bf-node p{font-size:13px;color:var(--text-secondary);line-height:1.5}
.bf-arrow{display:flex;align-items:center;padding-top:14px;color:var(--border);font-size:20px;font-weight:300}
.bf-features{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.bf-feat{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;transition:all .35s}
.bf-feat:hover{border-color:var(--accent-border);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.bf-feat h5{font-size:15px;font-weight:600;color:var(--brand);margin-bottom:6px}
.bf-feat p{font-size:14px;color:var(--text-secondary);line-height:1.7}

/* ===== Service ===== */
.service{background:var(--bg-cool);padding:110px 0;position:relative}
.serv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.serv-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-xl);padding:40px 32px;text-align:center;transition:all .4s cubic-bezier(.22,1,.36,1);box-shadow:var(--shadow-sm)}
.serv-card:hover{border-color:var(--accent-border);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.serv-card .ic{width:56px;height:56px;border-radius:16px;background:var(--accent-subtle);border:1px solid var(--accent-border);display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:26px;transition:all .3s}
.serv-card:hover .ic{background:var(--brand);border-color:var(--brand);color:var(--btn-text);transform:scale(1.05)}
.serv-card h4{font-size:18px;font-weight:700;color:var(--brand);margin-bottom:8px}
.serv-card p{font-size:15px;color:var(--text-secondary);line-height:1.8;margin-bottom:16px}
.serv-card .tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}
.serv-card .tags span{padding:4px 14px;background:var(--bg-cool);border:1px solid var(--border);border-radius:6px;font-size:12px;color:var(--text-secondary)}

/* ===== 活动视频（默认隐藏，有重要活动时启用） ===== */
.vbanner{background:linear-gradient(165deg,#0a0a0f 0%,#111118 55%,#1a1420 100%);padding:110px 0;position:relative;overflow:hidden}
.vbanner::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 70% 55% at 50% 40%,rgba(255,255,255,.03) 0%,transparent 65%);pointer-events:none}
.vbanner .wrap{position:relative;z-index:2}
.vb-player{max-width:960px;margin:48px auto 0;border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.14);box-shadow:0 30px 90px rgba(0,0,0,.55);background:#000}
.vb-player .vp video{width:100%;display:block;aspect-ratio:16/9;object-fit:cover;background:#000}
@media(max-width:768px){
  .vbanner{padding:80px 0}
  .vb-player{margin-top:32px}
}

/* ===== Cases ===== */
.cases{background:var(--bg-body);padding:110px 0}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{background:var(--bg-cool);border:1px solid var(--border);border-radius:var(--radius-xl);overflow:hidden;transition:all .4s cubic-bezier(.22,1,.36,1);display:block;text-decoration:none;color:inherit}
.case-card:hover{box-shadow:var(--shadow-lg);border-color:var(--accent-border);transform:translateY(-4px)}
.case-top{padding:28px 28px 0;display:flex;align-items:center;gap:14px;margin-bottom:12px}
.case-av{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--btn-text);font-weight:700;flex-shrink:0}
.case-info h4{font-size:18px;font-weight:700;color:var(--brand);margin-bottom:2px}
.case-info .ct{font-size:15px;color:var(--text-muted)}
.case-body{padding:0 28px 28px}
.case-body .quote{font-size:16px;color:var(--text-secondary);line-height:1.8;margin-bottom:14px;padding-left:14px;border-left:3px solid var(--accent)}
.case-body .results{display:flex;gap:16px;flex-wrap:wrap}
.case-body .results span{font-size:14px;color:var(--text-secondary)}
.case-body .results strong{color:var(--brand);font-size:15px}

/* ===== Customer Brands ===== */
.brands{background:var(--bg-section-2);padding:60px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.brands-scroll{overflow:hidden;position:relative}
.brands-track{display:flex;gap:40px;animation:scrollBrands 30s linear infinite;width:max-content}
.brands-track:hover{animation-play-state:paused}
.brands-item{flex-shrink:0;display:flex;align-items:center;justify-content:center;height:48px;padding:0 10px;opacity:.85;transition:opacity .3s;font-size:15px;color:var(--text-secondary);font-weight:500;white-space:nowrap}
.brands-item:hover{opacity:1}
@keyframes scrollBrands{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* ===== Contact Form ===== */
.contact{background:var(--bg-cool);padding:110px 0}
.contact-box{max-width:680px;margin:0 auto;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-xl);padding:48px 44px;box-shadow:var(--shadow-md)}
.cf-row{display:flex;gap:16px;margin-bottom:20px}
.cf-1{flex:1}
.cf-2{flex:1}
.cf-box label{display:block;font-size:15px;font-weight:600;color:var(--brand);margin-bottom:6px}
.cf-box input[type="text"],.cf-box input[type="tel"]{width:100%;padding:13px 16px;border:1.5px solid var(--border);border-radius:10px;font-size:15px;color:var(--text);background:var(--bg-white);outline:none;transition:border-color .25s,box-shadow .25s;box-sizing:border-box}
.cf-box input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(107,114,128,.07)}
.cf-box input::placeholder{color:var(--text-muted)}
.cf-box textarea{width:100%;padding:13px 16px;border:1.5px solid var(--border);border-radius:10px;font-size:15px;color:var(--text);background:var(--bg-white);outline:none;transition:border-color .25s,box-shadow .25s;box-sizing:border-box;resize:vertical;min-height:100px;font-family:inherit}
.cf-box textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(107,114,128,.07)}
.cf-box textarea::placeholder{color:var(--text-muted)}
.cf-cg{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.cf-cb{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--text-secondary);cursor:pointer;padding:7px 16px;border:1.5px solid var(--border);border-radius:8px;background:var(--bg-white);transition:all .2s;user-select:none}
.cf-cb:hover{border-color:var(--accent);background:rgba(107,114,128,.03)}
.cf-cb input{width:16px;height:16px;accent-color:var(--accent);margin:0}

/* ===== Footer ===== */
footer{background:var(--footer-bg, var(--brand-2));padding:72px 0 0;color:rgba(255,255,255,.65)}
.ft-main{padding-bottom:24px}
.ft-intro{text-align:center;margin-bottom:32px}
.ft-brand{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:14px}
.ft-logo{width:36px;height:36px;border-radius:8px;overflow:hidden;flex-shrink:0;line-height:0}
.ft-logo svg{display:block;width:100%;height:100%}
.ft-name{font-size:18px;font-weight:600;color:rgba(255,255,255,.85)}
.ft-tag{font-size:14px;color:rgba(255,255,255,.65);margin-left:4px}
.ft-meta{font-size:14px;color:rgba(255,255,255,.65);margin-bottom:24px;line-height:1.8}
.ft-links-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:left;max-width:800px;margin:0 auto 32px}
.ft-links{display:flex;flex-direction:column;gap:8px}
.ft-links strong{font-size:14px;color:rgba(255,255,255,.85);font-weight:600;letter-spacing:1px;margin-bottom:4px}
.ft-links a{font-size:14px;color:rgba(255,255,255,.6);text-decoration:none;transition:color .3s}
.ft-links a:hover{color:rgba(255,255,255,.8)}
.ft-divider{height:1px;background:rgba(255,255,255,.05);margin:0 0 28px}
.ft-stores{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;margin-bottom:24px}
.fts-g{display:flex;flex-direction:column;gap:8px;align-items:center;min-width:140px}
.fts-h{font-size:14px;color:rgba(255,255,255,.6);font-weight:600;letter-spacing:1px;white-space:nowrap}
.fts-b{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.fts-b a{display:inline-flex;align-items:center;gap:4px;padding:6px 16px;border:1px solid rgba(255,255,255,.12);border-radius:8px;color:rgba(255,255,255,.6);font-size:13px;text-decoration:none;transition:all .25s}
.fts-b a:hover{border-color:rgba(255,255,255,.25);color:rgba(255,255,255,.8);background:rgba(255,255,255,.04)}
.fts-n{font-size:13px;color:rgba(255,255,255,.5);padding:4px 0}
.ft-bottom{display:flex;justify-content:space-between;align-items:center;padding:20px 0;border-top:1px solid rgba(255,255,255,.05);font-size:13px;color:rgba(255,255,255,.6);flex-wrap:wrap;gap:8px}
.ft-icp{color:rgba(255,255,255,.5)}

/* ===== Floating Sidebar ===== */
.f-side{position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:99;display:flex;flex-direction:column;background:var(--bg-white);border:1px solid var(--border);border-radius:12px 0 0 12px;overflow:hidden;box-shadow:var(--shadow-lg);cursor:grab;user-select:none;touch-action:none}
.f-side.dragging{cursor:grabbing;box-shadow:var(--shadow-xl);transition:none}
.f-side .drag-handle{display:flex;justify-content:center;align-items:center;gap:3px;padding:6px 0 2px;cursor:grab;border-bottom:1px solid var(--border);background:var(--bg-cool);flex-shrink:0}
.f-side .drag-handle span{display:block;width:4px;height:4px;border-radius:50%;background:var(--text-muted);transition:background .2s}
.f-side:hover .drag-handle span{background:var(--accent)}
.f-side a{display:flex;align-items:center;gap:8px;padding:12px 18px;text-decoration:none;color:var(--text-secondary);font-size:13px;font-weight:500;transition:all .2s;border-bottom:1px solid var(--border)}
.f-side a:last-child{border-bottom:none}
.f-side a:hover{background:var(--bg-cool);color:var(--brand)}
.f-side .si{width:18px;text-align:center;font-size:15px}

/* ===== Mobile Toggle Active ===== */
.mobile-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.mobile-toggle.active span:nth-child(2){opacity:0}
.mobile-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Language Switch ===== */
.lang-switch{display:flex;align-items:center;gap:2px;margin-right:12px;font-size:12px;font-weight:600;user-select:none;flex-shrink:0}
.lang-opt{cursor:pointer;padding:3px 7px;border-radius:4px;color:rgba(255,255,255,.5);transition:all .2s;letter-spacing:.5px}
nav.scrolled .lang-opt{color:var(--text-muted)}
.lang-opt.active{color:#fff;background:rgba(255,255,255,.1)}
nav.scrolled .lang-opt.active{color:var(--brand);background:var(--accent-subtle)}
.lang-opt:hover{color:#fff}
nav.scrolled .lang-opt:hover{color:var(--brand)}
.lang-splt{color:rgba(255,255,255,.2);font-size:10px}

/* ===== 主题切换 ===== */
.theme-switch{position:relative;display:flex;align-items:center}
.theme-btn{width:32px;height:32px;border-radius:8px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;flex-shrink:0}
.theme-btn:hover{background:rgba(255,255,255,.16);transform:translateY(-1px)}
nav.scrolled .theme-btn{background:var(--bg-cool);border-color:var(--border);color:var(--brand)}
nav.scrolled .theme-btn:hover{background:var(--accent-subtle)}
.theme-menu{position:absolute;top:calc(100% + 12px);right:0;background:var(--bg-white);border:1px solid var(--border);border-radius:12px;box-shadow:0 16px 48px rgba(0,0,0,.14);padding:10px;display:none;flex-direction:column;gap:8px;z-index:300}
.theme-menu.show{display:flex}
.theme-menu::before{content:'';position:absolute;top:-6px;right:10px;width:12px;height:12px;background:var(--bg-white);border-left:1px solid var(--border);border-top:1px solid var(--border);transform:rotate(45deg)}
.theme-opt{width:30px;height:30px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .2s}
.theme-opt i{width:24px;height:24px;border-radius:50%;display:block;box-shadow:0 0 0 1px rgba(0,0,0,.08)}
.theme-opt:hover{transform:scale(1.15)}
.theme-opt.active{outline:2px solid var(--brand);outline-offset:2px}
nav.scrolled .lang-splt{color:var(--border)}
@media(max-width:768px){
  .lang-switch{margin-right:6px}
  .lang-opt{padding:2px 5px;font-size:11px}
  .theme-btn{width:30px;height:30px}
}


/* ===== Responsive Styles ===== */

@media(max-width:1024px){
  .nav-login{display:none}
  .only-mobile{display:inline-flex}
  .hero-metrics{grid-template-columns:repeat(3,1fr)}
  .chall-grid{grid-template-columns:repeat(2,1fr)}
  .sf-grid{grid-template-columns:repeat(2,1fr)}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .bf-features{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .cust-grid{grid-template-columns:repeat(2,1fr)}
  .serv-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
  .nav-links.open{display:flex;position:fixed;top:72px;left:0;right:0;background:var(--nav-bg-mobile, rgba(255,255,255,.98));backdrop-filter:blur(16px);flex-direction:column;padding:20px 32px 32px;gap:8px;border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);overflow-y:auto;max-height:calc(100vh - 72px)}
  .nav-links.open a,.nav-links.open .mega-nav>a{font-size:17px;padding:8px 0;color:var(--text-secondary);display:block}
  .nav-links.open a:hover,.nav-links.open .mega-nav>a:hover{color:var(--brand)}
  .nav-links.open .mega-nav{width:100%}
  .nav-links.open .mega-nav>a .arrow{display:none}
  .nav-links.open .mega-drop{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;padding:0 0 0 12px;margin:0;min-width:auto;background:transparent}
  .nav-links.open .mega-drop::before{display:none}
  .nav-links.open .mega-grid{grid-template-columns:1fr!important;gap:2px}
  .nav-links.open .mega-item{padding:6px 8px;border-radius:6px}
  .nav-links.open .mega-item .mi-ic{width:32px;height:32px;font-size:15px}
  .nav-links.open .mega-item .mi-t{font-size:14px}
  .nav-links.open .mega-item .mi-d{font-size:12px;white-space:normal}
  .nav-links.open .mega-section .sec-title{font-size:12px;padding:4px 8px 4px 0;border:none;color:var(--text-muted)}
  .mobile-toggle{display:flex}
  .nav-cta .btn{display:none}
}
@media(max-width:768px){
  .wrap{padding:0 20px}
  section{padding:80px 0}
  .hero{padding:100px 0 60px;min-height:auto}
  .hero h1{font-size:34px}
  .hero-metrics{grid-template-columns:repeat(3,1fr);gap:12px;padding:20px 0}
  .hm-num{font-size:24px}
  .hm-label{font-size:12px}
  .hero-slides{min-height:auto;padding:100px 0 40px}
  .hero-slide{position:relative;inset:auto;display:none;padding-top:0;transform:none;opacity:1;visibility:visible;pointer-events:auto}
  .hero-slide.active{display:flex}
  .hero-nav{margin-top:24px}
  .hero-video{margin-top:22px}
  .hero-cta-wrap{margin-top:28px}
  .hero-cta-bar{flex-direction:column;text-align:center;padding:20px}
  .hero-cta-bar .left{flex-direction:column;text-align:center}
  .chall-grid{grid-template-columns:1fr}
  .sf-grid{grid-template-columns:1fr}
  .prod-grid{grid-template-columns:1fr}
  .prod-card.wide{grid-column:span 1}
  .prod-card.wide .pc-feats{grid-template-columns:1fr}
  .prod-card .pf-item{padding:8px 12px}
  .prod-card .pf-item .pd span{font-size:12px}
  .scene-grid{grid-template-columns:1fr}
  .adv-grid{grid-template-columns:1fr}
  .bf-features{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .cust-grid{grid-template-columns:1fr}
  .serv-grid{grid-template-columns:1fr}
  .bf-flow{flex-direction:column;align-items:center}
  .bf-arrow{transform:rotate(90deg);padding:2px 0}
  .cf-row{flex-direction:column}
  .ft-links-wrap{grid-template-columns:repeat(2,1fr)}
  .f-side{display:none}
}
@media(max-width:480px){
  .hero-metrics{grid-template-columns:repeat(2,1fr)}
  .trust-g{grid-template-columns:repeat(2,1fr)}
  .hero-badge{font-size:12px;padding:4px 12px 4px 6px}
}