/* ============ Design Tokens（v3） ============ */
:root{
  --blue-600:#2563EB;--blue-700:#1D4ED8;--blue-500:#3B82F6;--blue-400:#60A5FA;
  --blue-100:#DBEAFE;--blue-50:#EFF6FF;--blue-200:#BFDBFE;
  --violet-500:#8B5CF6;--violet-600:#7C3AED;--indigo-400:#818CF8;
  --ink-900:#0F172A;--ink-700:#334155;--ink-600:#475569;--ink-400:#94A3B8;
  --bg-0:#FFFFFF;--bg-1:#F6F8FC;--bg-blue:#EEF4FF;--line:#E2E8F0;
  --grad-brand:linear-gradient(120deg,var(--blue-600) 0%,var(--violet-600) 100%);
  --grad-brand-soft:linear-gradient(135deg,var(--blue-400),var(--violet-500));
  --grad-border:linear-gradient(135deg,var(--blue-200),var(--indigo-400),var(--violet-500));
  --grad-text:linear-gradient(92deg,var(--blue-600) 0%,var(--violet-500) 55%,var(--blue-500) 100%);
  --grad-cta:linear-gradient(120deg,#1E3A8A 0%,#2563EB 40%,#6D28D9 80%,#8B5CF6 115%);
  --grad-card-batch:linear-gradient(150deg,#1E3A8A 0%,#2563EB 55%,#6D28D9 120%);
  --grad-card-unique:linear-gradient(150deg,#4C1D95 0%,#6D28D9 52%,#8B5CF6 120%);
  --radius-lg:16px;--radius-md:12px;--radius-sm:8px;
  --shadow-1:0 1px 2px rgba(15,23,42,.05);
  --shadow-2:0 10px 28px rgba(15,23,42,.08);
  --shadow-3:0 28px 68px rgba(37,99,235,.18);
  --ease:cubic-bezier(.22,1,.36,1);
  --nav-h:72px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Bahnschrift","Segoe UI","PingFang SC",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-cn);color:var(--ink-900);background:var(--bg-0);line-height:1.6;-webkit-font-smoothing:antialiased;text-wrap:pretty}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
section{position:relative}
section[id]{scroll-margin-top:84px}

/* ============ Scroll progress ============ */
.progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:200;background:var(--grad-brand);transform-origin:0 50%;transform:scaleX(0);box-shadow:0 1px 6px rgba(37,99,235,.4)}

/* ============ Buttons ============ */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 28px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .28s var(--ease),box-shadow .28s var(--ease),background .28s,border-color .28s,color .28s;white-space:nowrap;overflow:hidden}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:0 10px 24px rgba(37,99,235,.3)}
.btn-primary::after{content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;background:linear-gradient(105deg,transparent,rgba(255,255,255,.45),transparent);transform:skewX(-20deg);transition:left .6s var(--ease)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(37,99,235,.38)}
.btn-primary:hover::after{left:130%}
.btn-primary:active{transform:translateY(0)}
.btn-outline{border-color:#C7D8F7;color:var(--blue-700);background:#fff}
.btn-outline:hover{border-color:var(--blue-600);background:var(--blue-50);transform:translateY(-2px)}
.btn-outline-dark{border-color:var(--line);color:var(--ink-900);background:var(--bg-0)}
.btn-outline-dark:hover{border-color:var(--blue-600);color:var(--blue-600);transform:translateY(-2px)}
.btn-lg{height:54px;padding:0 36px;font-size:16px}
.btn:focus-visible{outline:2px solid var(--blue-500);outline-offset:3px}

/* ============ Nav ============ */
.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:100;background:#fff;border-bottom:1px solid transparent}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.nav-inner{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:flex;align-items:center;gap:12px;color:var(--ink-900)}
.logo-mark{width:44px;height:44px;border-radius:11px;background:var(--grad-brand);display:flex;align-items:center;justify-content:center;flex:none;box-shadow:0 4px 12px rgba(37,99,235,.35);transition:transform .3s var(--ease)}
.logo:hover .logo-mark{transform:rotate(-6deg) scale(1.06)}
.logo-text{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;line-height:1.2;height:44px}
.logo-text b{font-size:19px;font-weight:800;letter-spacing:1px;display:block}
.logo-text span{font-size:12px;letter-spacing:2px;color:var(--ink-600);margin-top:3px;display:block}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none;margin-left:auto}
.nav-links a{position:relative;display:block;padding:8px 14px;border-radius:var(--radius-sm);font-size:15px;color:var(--ink-600);font-weight:500;transition:color .2s}
.nav-links a::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;background:var(--grad-brand);transform:scaleX(0);transform-origin:0 50%;transition:transform .3s var(--ease)}
.nav-links a:hover{color:var(--blue-600)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--blue-600)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-actions .btn{height:40px;padding:0 18px;font-size:14px}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg-0);flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .3s var(--ease),opacity .3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{background:linear-gradient(180deg,#EAF2FF 0%,#F6FAFF 48%,#FFFFFF 100%);padding:calc(var(--nav-h) + 80px) 0 96px;overflow:hidden}
.aurora{position:absolute;top:-46%;left:50%;width:92vw;height:92vw;transform:translateX(-50%);background:conic-gradient(from 0deg,rgba(59,130,246,.22),rgba(139,92,246,.16),rgba(129,140,248,.2),rgba(59,130,246,.22));filter:blur(86px);border-radius:50%;animation:aurora-spin 30s linear infinite;pointer-events:none;opacity:.9;will-change:transform}
@keyframes aurora-spin{to{transform:translateX(-50%) rotate(360deg)}}
.orb{position:absolute;border-radius:50%;filter:blur(70px);pointer-events:none;will-change:transform}
.orb-1{width:520px;height:520px;top:-160px;right:-110px;background:radial-gradient(circle,rgba(59,130,246,.3) 0%,transparent 68%);animation:orb-drift 22s ease-in-out infinite alternate}
.orb-2{width:460px;height:460px;bottom:-190px;left:-130px;background:radial-gradient(circle,rgba(139,92,246,.22) 0%,transparent 66%);animation:orb-drift 26s ease-in-out infinite alternate-reverse}
@keyframes orb-drift{0%{transform:translate(0,0) scale(1)}100%{transform:translate(40px,-30px) scale(1.12)}}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(37,99,235,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.05) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(70% 60% at 50% 32%,#000 0%,transparent 78%);-webkit-mask-image:radial-gradient(70% 60% at 50% 32%,#000 0%,transparent 78%);pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:64px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;border:1px solid #C7D8F7;background:rgba(255,255,255,.8);font-size:13px;color:var(--blue-700);font-weight:500;margin-bottom:26px;box-shadow:var(--shadow-1);backdrop-filter:blur(6px)}
.hero-badge .dot{position:relative;width:7px;height:7px;border-radius:50%;background:var(--violet-500)}
.hero-badge .dot::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:1px solid rgba(139,92,246,.5);animation:pulse-ring 2.2s ease-out infinite}
@keyframes pulse-ring{0%{transform:scale(.6);opacity:1}100%{transform:scale(1.6);opacity:0}}
.hero h1{font-size:clamp(36px,5vw,62px);line-height:1.14;font-weight:800;letter-spacing:.5px;margin-bottom:24px;color:var(--ink-900)}
.hero h1 .grad{background:var(--grad-text);background-size:220% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:grad-pan 6s ease infinite}
@keyframes grad-pan{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.hero-sub{font-size:clamp(16px,1.6vw,19px);color:var(--ink-600);max-width:540px;margin-bottom:38px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:46px}
.hero-meta{display:flex;gap:34px;flex-wrap:wrap}
.hero-meta .m-item{display:flex;flex-direction:column;gap:2px}
.hero-meta .m-num{font-family:var(--font-num);font-size:24px;font-weight:700;background:var(--grad-text);background-size:200% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:grad-pan 7s ease infinite}
.hero-meta .m-label{font-size:13px;color:var(--ink-400)}

/* hero console UI */
.hero-visual{position:relative;perspective:1200px}
.hv-frame{position:relative;border-radius:calc(var(--radius-lg) + 2px);padding:1.5px;background:var(--grad-border);background-size:220% 220%;animation:grad-pan 8s ease infinite;box-shadow:var(--shadow-3);transform-style:preserve-3d;transition:transform .35s var(--ease)}
.hv-inner{position:relative;border-radius:var(--radius-lg);background:#fff;overflow:hidden}
.hv-bar{display:flex;align-items:center;gap:6px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--bg-1)}
.hv-bar i{width:9px;height:9px;border-radius:50%;background:#CBD5E1}
.hv-bar i:nth-child(1){background:#F87171}
.hv-bar i:nth-child(2){background:#FBBF24}
.hv-bar i:nth-child(3){background:#34D399}
.hv-bar .hv-url{margin-left:10px;flex:1;height:24px;border-radius:6px;background:#fff;border:1px solid var(--line);display:flex;align-items:center;padding:0 10px;font-size:12px;color:var(--ink-400);font-family:var(--font-num)}
.hv-body{padding:16px;display:flex;flex-direction:column;gap:12px}
.hv-apps{display:flex;flex-direction:column;gap:8px}
.hv-app{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg-0);transition:border-color .3s,transform .3s var(--ease)}
.hv-app:hover{border-color:#BFDBFE;transform:translateX(3px)}
.hv-app.dim{opacity:.72}
.hv-app-ic{width:30px;height:30px;border-radius:8px;background:var(--grad-brand-soft);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;flex:none}
.hv-app.dim .hv-app-ic{background:var(--bg-1);color:var(--ink-400);border:1px dashed var(--ink-400)}
.hv-app b{font-size:13.5px;display:block;line-height:1.2}
.hv-app i{font-size:11px;color:var(--ink-400);font-style:normal}
.hv-status{width:8px;height:8px;border-radius:50%;background:var(--line);margin-left:auto;flex:none}
.hv-status.on{background:#10B981;box-shadow:0 0 0 4px rgba(16,185,129,.15);animation:pulse-dot 2s ease-in-out infinite}
@keyframes pulse-dot{0%,100%{box-shadow:0 0 0 3px rgba(16,185,129,.16)}50%{box-shadow:0 0 0 6px rgba(16,185,129,.08)}}
.hv-chart-wrap{position:relative;border:1px solid var(--line);border-radius:10px;padding:10px 12px 8px;background:linear-gradient(180deg,var(--bg-1),#fff)}
.hv-chart{width:100%;height:64px;display:block}
.hv-chart .c-fill{fill:url(#cgrad);opacity:0;animation:fade-in 1.4s ease 1s forwards}
.hv-chart .c-line{fill:none;stroke:url(#cgrad2);stroke-width:2.2;stroke-linecap:round;stroke-dasharray:420;stroke-dashoffset:420;animation:draw 2s var(--ease) .5s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes fade-in{to{opacity:1}}
.hv-chart-label{font-size:11px;color:var(--ink-400);margin-top:4px}
.hv-bars{display:flex;align-items:flex-end;gap:7px;height:34px;padding:0 2px}
.hv-bars span{flex:1;border-radius:4px 4px 2px 2px;background:linear-gradient(180deg,var(--violet-500),var(--blue-600));height:var(--h);transform-origin:50% 100%;transform:scaleY(0);animation:grow .9s var(--ease) forwards;animation-delay:calc(var(--i)*.12s + .7s)}
@keyframes grow{to{transform:scaleY(1)}}
.hv-float{position:absolute;top:-18px;right:-14px;background:rgba(255,255,255,.72);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);color:var(--ink-900);border-radius:var(--radius-md);padding:12px 16px;box-shadow:var(--shadow-2);border:1px solid rgba(255,255,255,.9);font-size:13px;display:flex;align-items:center;gap:10px;font-weight:600;animation:bob 6s ease-in-out infinite}
.hv-float-2{top:auto;bottom:-16px;left:-14px;animation-delay:1.4s}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
.hv-float .qr{width:32px;height:32px;border-radius:7px;background:repeating-conic-gradient(var(--ink-900) 0% 25%,#fff 0% 50%) 0 0/6px 6px;opacity:.9}
.hv-float .ok{width:24px;height:24px;border-radius:50%;background:#10B981;color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;flex:none}

/* ============ Marquee ============ */
.marquee{overflow:hidden;background:var(--bg-0);border-bottom:1px solid var(--line);padding:20px 0;mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee-track{display:flex;width:max-content;animation:marquee 32s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes marquee{to{transform:translateX(-50%)}}
.marquee-group{display:flex;align-items:center;flex:none}
.mq-item{display:flex;align-items:center;gap:14px;padding:0 34px;font-size:15px;font-weight:600;color:var(--ink-700);white-space:nowrap}
.mq-item::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--grad-brand);flex:none}
.mq-item.grad{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ============ Section heads ============ */
.sec{padding:104px 0}
.sec#contact{padding-top:0}
.sec-head{max-width:680px;margin-bottom:60px}
.sec-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--blue-600);letter-spacing:2px;margin-bottom:14px}
.sec-tag::before{content:"";width:24px;height:2px;border-radius:2px;background:var(--grad-brand)}
.sec-head h2{font-size:clamp(26px,3vw,38px);font-weight:800;letter-spacing:.5px;margin-bottom:14px;line-height:1.25;color:var(--ink-900)}
.sec-head h2 em{font-style:normal;background:var(--grad-text);background-size:220% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:grad-pan 7s ease infinite}
.sec-head p{color:var(--ink-600);font-size:16px}
.sec.center .sec-head{margin-left:auto;margin-right:auto;text-align:center}
.sec.center .sec-tag::before{display:none}
.sec.center .sec-tag{justify-content:center}
.sec.center .sec-tag::after{content:"";width:24px;height:2px;border-radius:2px;background:var(--grad-brand)}

/* ============ Trust ============ */
.trust{border-bottom:1px solid var(--line);background:var(--bg-0)}
.trust-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:38px 0}
.trust-item{display:flex;gap:14px;align-items:flex-start;padding:12px;border-radius:var(--radius-md);transition:transform .3s var(--ease),background .3s,box-shadow .3s}
.trust-item:hover{transform:translateY(-3px);background:var(--bg-1);box-shadow:var(--shadow-1)}
.trust-item .t-ic{width:42px;height:42px;border-radius:11px;background:var(--grad-brand-soft);display:flex;align-items:center;justify-content:center;color:#fff;flex:none;box-shadow:0 6px 14px rgba(59,130,246,.25);transition:transform .3s var(--ease)}
.trust-item:hover .t-ic{transform:scale(1.08) rotate(-4deg)}
.trust-item .t-t{font-weight:600;font-size:15px;margin-bottom:2px}
.trust-item .t-d{font-size:13px;color:var(--ink-400);line-height:1.5}

/* ============ About ============ */
.about{background:var(--bg-0)}
.about-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:72px;align-items:center}
.about-points{display:flex;flex-direction:column;gap:0;margin-top:8px}
.apoint{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line);transition:padding-left .3s var(--ease)}
.apoint:last-child{border-bottom:none}
.apoint:hover{padding-left:8px}
.apoint .a-ic{width:42px;height:42px;border-radius:11px;background:var(--grad-brand-soft);display:flex;align-items:center;justify-content:center;color:#fff;flex:none;box-shadow:0 6px 14px rgba(59,130,246,.22);transition:transform .3s var(--ease)}
.apoint:hover .a-ic{transform:rotate(-6deg) scale(1.06)}
.apoint h4{font-size:16px;margin-bottom:4px;color:var(--ink-900)}
.apoint p{font-size:14px;color:var(--ink-600)}
.about-visual{position:relative}
.av-frame{position:relative;border-radius:calc(var(--radius-lg) + 2px);padding:1.5px;background:var(--grad-border);background-size:220% 220%;animation:grad-pan 9s ease infinite;box-shadow:var(--shadow-2)}
.av-inner{border-radius:var(--radius-lg);background:var(--bg-blue);padding:34px;position:relative;overflow:hidden}
.av-inner::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(37,99,235,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.07) 1px,transparent 1px);background-size:40px 40px;mask-image:radial-gradient(75% 75% at 50% 50%,#000 0%,transparent 88%);-webkit-mask-image:radial-gradient(75% 75% at 50% 50%,#000 0%,transparent 88%)}
.av-cards{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.av-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:20px;box-shadow:var(--shadow-1);transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;animation:bob 7s ease-in-out infinite}
.av-card:nth-child(2){animation-delay:1.2s}
.av-card:nth-child(3){animation-delay:2.4s}
.av-card:nth-child(4){animation-delay:3.6s}
.av-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#BFDBFE}
.av-card b{display:flex;align-items:center;gap:8px;font-size:15px;margin-bottom:6px}
.av-card span{font-size:13px;color:var(--ink-400);line-height:1.6}
.av-card .a-dot{width:8px;height:8px;border-radius:50%;background:var(--grad-brand);flex:none}

/* ============ Products ============ */
.products{position:relative;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:
  radial-gradient(46% 42% at 10% 6%,rgba(59,130,246,.13) 0%,transparent 62%),
  radial-gradient(42% 38% at 90% 94%,rgba(139,92,246,.13) 0%,transparent 62%),
  radial-gradient(rgba(37,99,235,.05) 1px,transparent 1.5px) 0 0/26px 26px,
  linear-gradient(180deg,var(--bg-1) 0%,var(--bg-blue) 52%,var(--bg-1) 100%)}
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.pcard{position:relative;border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;background:#fff;box-shadow:var(--shadow-1);transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s;display:flex;flex-direction:column;overflow:hidden}
.pcard::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad-brand);transform:scaleX(0);transform-origin:0 50%;transition:transform .45s var(--ease);z-index:1}
.pcard::after{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(320px at var(--mx,50%) var(--my,50%),rgba(59,130,246,.09),transparent 70%);opacity:0;transition:opacity .35s;pointer-events:none}
.pcard:hover{transform:translateY(-6px);box-shadow:var(--shadow-2);border-color:#C7D8F7}
.pcard:hover::before{transform:scaleX(1)}
.pcard:hover::after{opacity:1}
.pcard-head{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.pcard-ic{width:52px;height:52px;border-radius:13px;background:var(--grad-brand);display:flex;align-items:center;justify-content:center;color:#fff;font-size:22px;font-weight:800;flex:none;box-shadow:0 8px 18px rgba(37,99,235,.28);transition:transform .35s var(--ease)}
.pcard:hover .pcard-ic{transform:scale(1.08) rotate(-4deg)}
.pcard .p-name{font-size:19px;font-weight:700;color:var(--ink-900)}
.pcard .p-sub{font-size:12.5px;color:var(--ink-400)}
.pcard .p-desc{color:var(--ink-600);font-size:14.5px;margin-bottom:18px;flex:1}
.ptags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.ptag{font-size:12.5px;color:var(--blue-700);background:var(--blue-50);border:1px solid #D6E4FF;padding:4px 12px;border-radius:999px;font-weight:500;transition:background .25s,border-color .25s,color .25s}
.ptag:hover{background:#fff;border-color:var(--blue-500);color:var(--blue-600)}
.pcard .btn{align-self:flex-start}
.pcard.ghost{background:transparent;border-style:dashed;border-color:#C3CDDB;align-items:center;justify-content:center;text-align:center;padding:32px 28px;box-shadow:none}
.pcard.ghost:hover{border-color:var(--blue-500);background:rgba(255,255,255,.7)}
.pcard.ghost::before{transform:scaleX(0)}
.pcard.ghost .g-ic{width:52px;height:52px;border-radius:13px;background:#fff;border:1px dashed var(--ink-400);display:flex;align-items:center;justify-content:center;color:var(--ink-400);font-size:24px;margin-bottom:16px;transition:transform .35s var(--ease),color .3s,border-color .3s}
.pcard.ghost:hover .g-ic{transform:rotate(90deg) scale(1.06);color:var(--blue-600);border-color:var(--blue-500)}
.pcard.ghost h3{font-size:18px;margin-bottom:8px;color:var(--ink-900)}
.pcard.ghost p{color:var(--ink-400);font-size:13.5px;max-width:280px;margin-bottom:18px}

/* ============ Platform ============ */
.platform{background:var(--bg-0)}
.pfgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.pf{background:var(--bg-1);border:1px solid var(--line);border-radius:var(--radius-md);padding:28px;position:relative;overflow:hidden;transition:background .3s,border-color .3s,transform .35s var(--ease),box-shadow .35s}
.pf::after{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(340px at var(--mx,50%) var(--my,50%),rgba(59,130,246,.1),transparent 70%);opacity:0;transition:opacity .35s;pointer-events:none}
.pf:hover{background:#fff;border-color:#C7D8F7;transform:translateY(-4px);box-shadow:var(--shadow-2)}
.pf:hover::after{opacity:1}
.pf-ic{width:44px;height:44px;border-radius:11px;background:var(--grad-brand-soft);display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:16px;box-shadow:0 6px 14px rgba(59,130,246,.24);transition:transform .35s var(--ease)}
.pf:hover .pf-ic{transform:scale(1.1) rotate(-5deg)}
.pf h3{font-size:17px;margin-bottom:8px;color:var(--ink-900)}
.pf p{font-size:14px;color:var(--ink-600);line-height:1.65}

/* ============ Why ============ */
.why{background:linear-gradient(180deg,var(--bg-blue) 0%,#F3F8FF 100%);border-top:1px solid #D6E4FF;border-bottom:1px solid #D6E4FF;overflow:hidden}
.why::before{content:"";position:absolute;top:-140px;right:-100px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(139,92,246,.14) 0%,transparent 65%);filter:blur(40px);pointer-events:none}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.wcard{background:#fff;border:1px solid #D6E4FF;border-radius:var(--radius-md);padding:30px 26px;text-align:center;transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;position:relative;overflow:hidden}
.wcard::after{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(300px at var(--mx,50%) var(--my,50%),rgba(59,130,246,.08),transparent 70%);opacity:0;transition:opacity .35s;pointer-events:none}
.wcard:hover{transform:translateY(-6px);box-shadow:var(--shadow-2);border-color:#BFDBFE}
.wcard:hover::after{opacity:1}
.wcard .w-ic{position:relative;width:54px;height:54px;margin:0 auto 16px;border-radius:50%;background:var(--grad-brand);display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 10px 22px rgba(37,99,235,.3);transition:transform .35s var(--ease)}
.wcard:hover .w-ic{transform:translateY(-4px) scale(1.06)}
.wcard h3{position:relative;font-size:16.5px;margin-bottom:8px;color:var(--ink-900)}
.wcard p{position:relative;font-size:13.5px;color:var(--ink-600);line-height:1.65}

/* ============ Flow（时间轴） ============ */
.flow{background:linear-gradient(180deg,#fff 0%,#F8FAFF 55%,#fff 100%);overflow:hidden}
.flow::before{content:"";position:absolute;top:-120px;left:-120px;width:380px;height:380px;border-radius:50%;background:radial-gradient(circle,rgba(59,130,246,.1) 0%,transparent 65%);filter:blur(46px);pointer-events:none}
.flow-track{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.flow-line{position:absolute;top:20px;left:4%;right:4%;height:2px;border-radius:2px;background:var(--line);pointer-events:none}
.flow-line::after{content:"";position:absolute;top:-3px;left:0;width:110px;height:8px;border-radius:999px;background:linear-gradient(90deg,transparent,var(--blue-600),var(--violet-500),transparent);filter:blur(.4px);animation:comet 4.5s linear infinite}
@keyframes comet{0%{left:-4%;opacity:0}10%{opacity:1}85%{opacity:1}100%{left:104%;opacity:0}}
.fstep{position:relative;padding:24px 22px 22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-1);overflow:hidden;transition:transform .35s var(--ease),box-shadow .35s,border-color .35s}
.fstep::after{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(300px at var(--mx,50%) var(--my,50%),rgba(59,130,246,.08),transparent 70%);opacity:0;transition:opacity .35s;pointer-events:none}
.fstep:hover{transform:translateY(-6px);box-shadow:var(--shadow-2);border-color:#C7D8F7}
.fstep:hover::after{opacity:1}
.f-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.f-ic{width:44px;height:44px;border-radius:11px;background:var(--grad-brand);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 18px rgba(37,99,235,.26);flex:none;transition:transform .35s var(--ease)}
.fstep:hover .f-ic{transform:scale(1.08) rotate(-5deg)}
.fstep h3{font-size:17px;color:var(--ink-900)}
.fstep p{font-size:13.5px;color:var(--ink-600);line-height:1.65;margin-bottom:12px}
.f-chips{display:flex;flex-wrap:wrap;gap:6px}
.f-chips span{font-size:11.5px;color:var(--ink-400);background:var(--bg-1);border:1px solid var(--line);padding:3px 9px;border-radius:999px;transition:color .25s,border-color .25s,background .25s}
.fstep:hover .f-chips span{color:var(--blue-700);border-color:#D6E4FF;background:var(--blue-50)}
.f-num{position:absolute;top:2px;right:10px;font-family:var(--font-num);font-size:54px;font-weight:800;line-height:1;background:var(--grad-text);background-size:220% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;opacity:.18;transition:opacity .35s;animation:grad-pan 7s ease infinite;pointer-events:none}
.fstep:hover .f-num{opacity:.9}

/* ============ CTA ============ */
.cta-band{position:relative;border-radius:var(--radius-lg);padding:62px 56px;display:flex;align-items:center;justify-content:space-between;gap:40px;color:#fff;box-shadow:var(--shadow-3);overflow:hidden;background:var(--grad-cta);background-size:180% 180%;animation:grad-pan 10s ease infinite;transform-style:preserve-3d;transition:transform .35s var(--ease)}
.cta-band::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);background-size:44px 44px;pointer-events:none}
.cta-band .c-orb{position:absolute;border-radius:50%;filter:blur(50px);pointer-events:none}
.cta-band .c-orb-1{width:260px;height:260px;top:-110px;right:8%;background:radial-gradient(circle,rgba(255,255,255,.25) 0%,transparent 65%);animation:bob 9s ease-in-out infinite}
.cta-band .c-orb-2{width:220px;height:220px;bottom:-100px;left:6%;background:radial-gradient(circle,rgba(139,92,246,.3) 0%,transparent 65%);animation:bob 11s ease-in-out infinite reverse}
.cta-band h2{position:relative;font-size:clamp(24px,2.6vw,32px);font-weight:800;margin-bottom:10px;line-height:1.3}
.cta-band p{position:relative;color:rgba(255,255,255,.88);font-size:15px}
.cta-actions{position:relative;display:flex;gap:14px;flex-wrap:wrap;flex:none}
.btn-white{background:#fff;color:var(--blue-600);box-shadow:0 8px 20px rgba(15,23,42,.18)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(15,23,42,.24)}
.btn-glass{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);backdrop-filter:blur(6px)}
.btn-glass:hover{background:rgba(255,255,255,.26);border-color:#fff;transform:translateY(-2px)}

/* ============ Footer ============ */
.footer{background:var(--bg-1);border-top:1px solid var(--line);padding:64px 0 36px}
.footer-top{display:grid;grid-template-columns:1.4fr 1.7fr;gap:48px;margin-bottom:48px}
.footer-links{display:grid;grid-template-columns:1fr 1fr 2fr;gap:32px}
.f-brand p{color:var(--ink-400);font-size:14px;line-height:1.75;max-width:300px;margin-top:16px}
.f-col h4{font-size:14px;color:var(--ink-900);margin-bottom:16px;font-weight:600}
.f-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.f-col a{color:var(--ink-600);font-size:14px;transition:color .2s,padding-left .25s}
.f-col a:hover{color:var(--blue-600);padding-left:4px}
.f-contact{font-size:14px;color:var(--ink-600);line-height:2}
.footer-bottom{border-top:1px solid var(--line);padding-top:26px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--ink-400);font-size:13px}
.footer-bottom a{color:var(--ink-600)}
.footer-bottom a:hover{color:var(--blue-600)}

/* ============ Reveal ============ */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal[data-move="left"]{transform:translateX(-36px)}
.reveal[data-move="right"]{transform:translateX(36px)}
.reveal[data-move="zoom"]{transform:scale(.92)}
.reveal.in{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.08s}
.reveal[data-delay="2"]{transition-delay:.16s}
.reveal[data-delay="3"]{transition-delay:.24s}

/* ============ Tweaks ============ */
.tweaks{position:fixed;bottom:130px;right:22px;z-index:300;display:flex;flex-direction:column;align-items:flex-end;gap:10px}
.tweaks-btn{width:46px;height:46px;border-radius:50%;border:none;background:var(--grad-brand);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(37,99,235,.35);transition:transform .3s var(--ease)}
.tweaks-btn:hover{transform:rotate(90deg) scale(1.06)}
.tweaks-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-2);padding:18px 18px 14px;width:240px;display:none;animation:panel-in .35s var(--ease)}
.tweaks-panel.open{display:block}
@keyframes panel-in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.tweaks-panel h5{font-size:13px;color:var(--ink-400);font-weight:600;letter-spacing:1px;margin-bottom:12px}
.tk-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;font-size:13.5px;color:var(--ink-700)}
.switch{position:relative;width:38px;height:21px;border-radius:999px;background:#CBD5E1;transition:background .3s;border:none}
.switch::after{content:"";position:absolute;top:2px;left:2px;width:17px;height:17px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(15,23,42,.3);transition:left .3s var(--ease)}
.switch.on{background:var(--blue-600)}
.switch.on::after{left:19px}
.tk-preset{display:flex;gap:6px;flex-wrap:wrap}
.tk-preset button{flex:1 1 calc(50% - 6px);min-width:72px;height:30px;border-radius:7px;border:1px solid var(--line);background:var(--bg-1);font-size:11.5px;color:var(--ink-600);display:flex;align-items:center;justify-content:center;gap:5px;transition:all .25s}
.tk-preset button::before{content:"";width:15px;height:15px;border-radius:4px;background:var(--sw,#CBD5E1);flex:none;box-shadow:inset 0 0 0 1px rgba(15,23,42,.08)}
.tk-preset button.on{border-color:var(--blue-600);color:var(--blue-600);background:var(--blue-50);font-weight:600}
body.fx-off .reveal{opacity:1;transform:none;transition:none}
body.fx-off *{animation:none!important}
body.fx-off .progress{display:none}
/* 主色切换：只换主渐变（图标底/logo/主按钮），版式结构色不动 */
body.theme-pureblue{
  --grad-brand:linear-gradient(120deg,#1D4ED8 0%,#3B82F6 100%);
  --grad-brand-soft:linear-gradient(135deg,#3B82F6,#60A5FA);
}
body.theme-indigo{
  --grad-brand:linear-gradient(120deg,#4F46E5 0%,#7C3AED 100%);
  --grad-brand-soft:linear-gradient(135deg,#6366F1,#8B5CF6);
}
body.theme-sky{
  --grad-brand:linear-gradient(120deg,#2563EB 0%,#38BDF8 100%);
  --grad-brand-soft:linear-gradient(135deg,#3B82F6,#7DD3FC);
}
body.theme-cyanblue{
  --grad-brand:linear-gradient(120deg,#2563EB 0%,#06B6D4 100%);
  --grad-brand-soft:linear-gradient(135deg,#3B82F6,#22D3EE);
}
body.theme-navyviolet{
  --grad-brand:linear-gradient(120deg,#1E3A8A 0%,#6D28D9 100%);
  --grad-brand-soft:linear-gradient(135deg,#2563EB,#7C3AED);
}
body.theme-coral{
  --grad-brand:linear-gradient(120deg,#E11D48 0%,#F97316 100%);
  --grad-brand-soft:linear-gradient(135deg,#F43F5E,#FB923C);
}

/* ============ 悬浮按钮 ============ */
.fab-stack{position:fixed;right:20px;bottom:20px;z-index:150;display:flex;flex-direction:column;gap:12px}
.fab{width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(15,23,42,.18);border:none;cursor:pointer;transition:transform .3s var(--ease),box-shadow .3s,opacity .3s}
.fab:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(15,23,42,.24)}
.fab-service{background:var(--grad-brand);color:#fff}
.fab-top{background:#fff;color:var(--blue-600);border:1px solid var(--line);opacity:0;transform:translateY(10px);pointer-events:none}
.fab-top.show{opacity:1;transform:none;pointer-events:auto}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:56px}
  .hero-visual{max-width:560px}
  .about-inner{grid-template-columns:1fr;gap:48px}
  .pgrid{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .flow-track{grid-template-columns:repeat(2,1fr);gap:22px}
  .flow-line{display:none}
  .footer-top{grid-template-columns:1fr;gap:36px}
  .footer-links{grid-template-columns:repeat(3,1fr);gap:28px}
}
@media (max-width:768px){
  .nav-links{position:fixed;top:var(--nav-h);left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 20px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-2);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 10px;font-size:16px}
  .nav-actions .btn-login{display:none}
  .nav-toggle{display:flex}
  .hero{padding-top:calc(var(--nav-h) + 48px)}
  .trust-inner{grid-template-columns:1fr 1fr}
  .pgrid{grid-template-columns:1fr}
  .pfgrid{grid-template-columns:1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:44px 30px}
  .sec{padding:76px 0}
  .tweaks{display:none}
  .fab{width:42px;height:42px}
  .fab-stack{right:14px;bottom:18px}
  .footer{padding:48px 0 28px}
  .footer-top{margin-bottom:36px}
  .f-brand p{max-width:100%}
  .footer-links{grid-template-columns:1fr 1fr}
  .footer-links .f-col:last-child{grid-column:1/-1}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  /* iOS Safari 渲染修复：禁 3D 透视与毛玻璃，避免滚动后内容截半 */
  .nav{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none}
  .hero-badge,.hv-float,.btn-glass{backdrop-filter:none;-webkit-backdrop-filter:none}
  .hero-visual{perspective:none}
  .hv-frame,.cta-band{transform-style:flat}
}
@media (max-width:520px){
  .trust-inner{grid-template-columns:1fr;gap:18px}
  .why-grid{grid-template-columns:1fr}
  .flow-track{grid-template-columns:1fr}
  .hero-meta{gap:22px}
  .hv-float{right:-4px}
  .hv-float-2{left:-4px}
  .nav-actions .btn-primary{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}