/* ============ Design Tokens（与官网 v3 一致） ============ */
: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;
  --green-500:#10B981;--amber-500:#F59E0B;
  --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}

/* ============ Progress / Buttons ============ */
.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)}
.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-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-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(34px,4.6vw,58px);line-height:1.14;font-weight:800;letter-spacing:.5px;margin-bottom:20px;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:36px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:42px}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px}
.htag{font-size:13px;font-weight:600;color:var(--blue-700);background:#fff;border:1px solid #C7D8F7;padding:7px 14px;border-radius:999px;box-shadow:var(--shadow-1);transition:transform .25s var(--ease),border-color .25s}
.htag:hover{transform:translateY(-2px);border-color:var(--blue-500)}
.htag b{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}

/* hero phone mock */
.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{border-radius:var(--radius-lg);background:#fff;overflow:hidden}
.hv-top{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line);background:var(--bg-1)}
.hv-top .phone-ic{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--navy-900,#0B1F3A),var(--navy-700,#16345E));color:#fff;display:flex;align-items:center;justify-content:center}
.hv-top b{font-size:15px;display:block}
.hv-top span{font-size:12px;color:var(--ink-400)}
.hv-body{padding:18px;display:flex;flex-direction:column;gap:14px}
.hv-scan{position:relative;border:1px solid var(--line);border-radius:12px;background:linear-gradient(180deg,var(--bg-1),#fff);padding:16px;overflow:hidden}
.hv-scan::after{content:"";position:absolute;left:0;right:0;top:-30%;height:26%;background:linear-gradient(180deg,transparent,rgba(37,99,235,.18),transparent);animation:scan-move 2.6s ease-in-out infinite}
@keyframes scan-move{0%,100%{top:-30%}50%{top:110%}}
.hv-scan-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.hv-qr{width:44px;height:44px;border-radius:9px;background:repeating-conic-gradient(var(--ink-900) 0% 25%,#fff 0% 50%) 0 0/7px 7px;flex:none}
.hv-scan-top b{font-size:14px;display:block}
.hv-scan-top span{font-size:11.5px;color:var(--ink-400)}
.hv-fields{display:flex;flex-direction:column;gap:7px}
.hv-field{display:flex;justify-content:space-between;align-items:center;font-size:12.5px;padding:7px 10px;background:#fff;border:1px solid var(--line);border-radius:8px}
.hv-field span{color:var(--ink-400)}
.hv-field b{font-weight:600;font-size:12.5px}
.hv-field .ok{width:16px;height:16px;border-radius:50%;background:var(--green-500);color:#fff;display:flex;align-items:center;justify-content:center;font-size:10px;flex:none}
.hv-timeline{display:flex;align-items:center;gap:0;padding:2px 2px 0}
.hv-tl{flex:1;text-align:center}
.hv-tl i{display:block;width:10px;height:10px;margin:0 auto 5px;border-radius:50%;background:var(--blue-400);box-shadow:0 0 0 3px rgba(59,130,246,.15)}
.hv-tl:last-child i{background:var(--green-500);box-shadow:0 0 0 3px rgba(16,185,129,.15)}
.hv-tl span{font-size:10.5px;color:var(--ink-400);display:block}
.hv-tl-line{flex:1;height:2px;background:var(--grad-brand);margin-bottom:14px}
.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 .ok{width:24px;height:24px;border-radius:50%;background:var(--green-500);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;flex:none}
.hv-float .warn{width:24px;height:24px;border-radius:50%;background:var(--amber-500);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;flex:none}

/* ============ Section heads ============ */
.sec{padding:104px 0}
.sec#contact{padding-top:0}
.sec-head{max-width:720px;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}

/* ============ 双模式 ============ */
.modes{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.mode-card{position:relative;border-radius:var(--radius-lg);padding:40px 36px;overflow:hidden;transition:transform .35s var(--ease),box-shadow .35s;border:1px solid transparent}
.mode-card::after{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(340px at var(--mx,50%) var(--my,50%),rgba(255,255,255,.25),transparent 70%);opacity:0;transition:opacity .35s;pointer-events:none}
.mode-card:hover::after{opacity:1}
.mode-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-3)}
.mode-card.batch{background:var(--grad-card-batch);color:#fff}
.mode-card.unique{background:var(--grad-card-unique);color:#fff}
.mode-card .m-badge{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;padding:5px 13px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);margin-bottom:20px}
.mode-card h3{font-size:26px;font-weight:800;margin-bottom:10px;letter-spacing:1px}
.mode-card .m-sub{font-size:14px;opacity:.85;margin-bottom:24px;line-height:1.7}
.mode-list{display:flex;flex-direction:column;gap:10px;margin-bottom:28px}
.mode-li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;line-height:1.6}
.mode-li .mk{width:20px;height:20px;border-radius:50%;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:11px;flex:none;margin-top:2px}
.mode-note{font-size:12.5px;opacity:.72;border-top:1px solid rgba(255,255,255,.22);padding-top:16px;line-height:1.7}

/* ============ 功能全景 ============ */
.features{background:var(--bg-0)}
.fgroup{margin-bottom:52px}
.fgroup:last-child{margin-bottom:0}
.fgroup-head{display:flex;align-items:center;gap:12px;margin-bottom:22px}
.fgroup-head .fg-ic{width:40px;height:40px;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)}
.fgroup-head h3{font-size:19px;font-weight:700;color:var(--ink-900)}
.fgroup-head p{font-size:13.5px;color:var(--ink-400)}
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.fcard{position:relative;background:var(--bg-1);border:1px solid var(--line);border-radius:var(--radius-md);padding:26px 24px;overflow:hidden;transition:transform .35s var(--ease),box-shadow .35s,border-color .35s,background .3s}
.fcard::after{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(280px at var(--mx,50%) var(--my,50%),rgba(59,130,246,.09),transparent 70%);opacity:0;transition:opacity .35s;pointer-events:none}
.fcard:hover{transform:translateY(-5px);background:#fff;border-color:#C7D8F7;box-shadow:var(--shadow-2)}
.fcard:hover::after{opacity:1}
.fcard .f-ic{width:42px;height:42px;border-radius:11px;background:#fff;border:1px solid #D6E4FF;display:flex;align-items:center;justify-content:center;color:var(--blue-600);margin-bottom:14px;box-shadow:var(--shadow-1);transition:transform .3s var(--ease)}
.fcard:hover .f-ic{transform:scale(1.08) rotate(-5deg)}
.fcard h4{font-size:15.5px;margin-bottom:7px;color:var(--ink-900)}
.fcard p{font-size:13.5px;color:var(--ink-600);line-height:1.65}
.fcard .f-badge{position:absolute;top:18px;right:18px;font-size:11px;font-weight:600;color:var(--amber-600,#D97706);background:#FFFBEB;border:1px solid #FDE68A;padding:3px 9px;border-radius:999px}

/* ============ 作业场景 ============ */
.pda{background:linear-gradient(180deg,var(--bg-blue) 0%,#F3F8FF 100%);border-top:1px solid #D6E4FF;border-bottom:1px solid #D6E4FF;overflow:hidden}
.pda::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}
.arch{display:flex;align-items:stretch;margin-bottom:64px}
.arch-node{position:relative;flex:1 1 0;min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:28px 24px;box-shadow:var(--shadow-1);text-align:center;transition:transform .35s var(--ease),box-shadow .35s,border-color .35s;z-index:1}
.arch-node:hover{transform:translateY(-5px);box-shadow:var(--shadow-2);border-color:#C7D8F7}
.arch-node .a-ic{width:52px;height:52px;margin:0 auto 14px;border-radius:14px;background:var(--grad-brand);display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 10px 22px rgba(37,99,235,.28)}
.arch-node.admin .a-ic{background:linear-gradient(135deg,#6366F1,#818CF8)}
.arch-node.pda-node .a-ic{background:var(--grad-brand)}
.arch-node.h5 .a-ic{background:linear-gradient(135deg,#6D28D9,#8B5CF6)}
.arch-node h3{font-size:17px;margin-bottom:6px;color:var(--ink-900)}
.arch-node p{font-size:13.5px;color:var(--ink-600);line-height:1.65}
.arch-link{position:relative;flex:0 0 56px;display:flex;align-items:center;justify-content:center;z-index:0}
.arch-link::before{content:"";position:absolute;left:0;right:0;height:2px;background:var(--grad-brand);opacity:.35}
.arch-link::after{content:"";width:9px;height:9px;border-radius:50%;background:var(--violet-500);position:relative;box-shadow:0 0 0 4px rgba(139,92,246,.18)}
.pda-flow{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.pflow{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px 18px;text-align:center;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s}
.pflow:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#C7D8F7}
.pflow .pf-num{font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--blue-600);background:var(--blue-50);border:1px solid #D6E4FF;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;transition:background .3s,color .3s}
.pflow:hover .pf-num{background:var(--grad-brand);color:#fff;border-color:transparent}
.pflow .pf-ic{width:40px;height:40px;margin:0 auto 12px;border-radius:11px;background:var(--bg-1);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--blue-600)}
.pflow h4{font-size:14.5px;margin-bottom:5px;color:var(--ink-900)}
.pflow p{font-size:12px;color:var(--ink-400);line-height:1.6}

/* ============ 行业 ============ */
.industries{background:var(--bg-0)}
.ind-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ind-card{display:flex;gap:16px;align-items:flex-start;background:var(--bg-1);border:1px solid var(--line);border-radius:var(--radius-md);padding:26px 24px;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s,background .3s}
.ind-card:hover{transform:translateY(-4px);background:#fff;border-color:#C7D8F7;box-shadow:var(--shadow-2)}
.ind-card .i-ic{width:44px;height:44px;border-radius:12px;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)}
.ind-card b{font-size:15.5px;display:block;margin-bottom:4px;color:var(--ink-900)}
.ind-card span{font-size:13.5px;color:var(--ink-600);line-height:1.6}

/* ============ 架构信任 ============ */
.secure{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.sec-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:28px 24px;text-align:center;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s}
.sec-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#C7D8F7}
.sec-card .s-ic{width:50px;height:50px;margin:0 auto 14px;border-radius:50%;background:var(--grad-brand);display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 8px 18px rgba(37,99,235,.26)}
.sec-card h3{font-size:15.5px;margin-bottom:6px;color:var(--ink-900)}
.sec-card p{font-size:13px;color:var(--ink-600);line-height:1.6}

/* ============ FAQ ============ */
.faq{background:var(--bg-0)}
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-md);background:#fff;overflow:hidden;transition:border-color .3s,box-shadow .3s}
.faq-item.open{border-color:#C7D8F7;box-shadow:var(--shadow-2)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 26px;background:none;border:none;font-size:15.5px;font-weight:600;color:var(--ink-900);text-align:left}
.faq-q .fq-arrow{width:28px;height:28px;border-radius:50%;background:var(--bg-1);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--blue-600);flex:none;transition:transform .3s var(--ease),background .3s,color .3s}
.faq-item.open .fq-arrow{transform:rotate(45deg);background:var(--grad-brand);color:#fff;border-color:transparent}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.faq-a-inner{padding:0 26px 22px;color:var(--ink-600);font-size:14.5px;line-height:1.8}

/* ============ 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}
body.fx-off .reveal{opacity:1;transform:none;transition:none}
body.fx-off *{animation:none!important}
body.fx-off .progress{display:none}
.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}
/* 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:520px}
  .mode-grid{grid-template-columns:1fr}
  .fgrid{grid-template-columns:repeat(2,1fr)}
  .arch{flex-direction:column}
  .arch-link{flex:0 0 40px;width:100%}
  .arch-link::before{width:2px;height:100%;left:50%;top:0}
  .arch-link::after{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}
  .pda-flow{grid-template-columns:repeat(3,1fr)}
  .ind-grid{grid-template-columns:repeat(2,1fr)}
  .sec-grid{grid-template-columns:repeat(2,1fr)}
  .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}
  .fgrid{grid-template-columns:1fr}
  .pda-flow{grid-template-columns:1fr 1fr}
  .ind-grid{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}
  .pda-flow{grid-template-columns:1fr}
  .sec-grid{grid-template-columns:1fr}
  .hero-tags{gap:7px}
  .hv-float{right:-4px}
  .hv-float-2{left:-4px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}