:root{
  --bg:#04060e;
  --bg-soft:#0a1020;
  --panel:#0c1428;
  --panel-2:#121d34;
  --line:rgba(148,197,255,.16);
  --text:#f2f6ff;
  --muted:#b9c8e6;
  --gold:#ffd166;
  --gold-2:#ffe6a3;
  --blue:#61a4ff;
  --teal:#5cf0dc;
  --shadow:0 34px 100px rgba(0,0,0,.62);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;z-index:-2;background:
  radial-gradient(640px 440px at 10% -10%,rgba(97,164,255,.28),transparent 62%),
  radial-gradient(720px 480px at 92% -4%,rgba(255,209,102,.18),transparent 64%),
  radial-gradient(640px 480px at 50% 120%,rgba(92,240,220,.16),transparent 62%)}
body::after{content:"";position:fixed;inset:0;z-index:-1;opacity:.44;pointer-events:none;background-image:linear-gradient(rgba(185,200,230,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(185,200,230,.09) 1px,transparent 1px);background-size:42px 42px;mask-image:radial-gradient(circle at 50% 8%,#000 0%,transparent 74%)}
a{color:inherit;text-decoration:none}

.topbar{position:sticky;top:0;z-index:20;backdrop-filter:blur(16px);background:rgba(4,6,14,.62);border-bottom:1px solid var(--line)}
.topbar-inner{max-width:1180px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:18px 24px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:2px;font-size:18px}
.logo-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--gold),#f0a92e 55%,#7b5cff);display:grid;place-items:center;color:#120f02;font-size:15px;font-weight:900;box-shadow:0 10px 24px rgba(255,209,102,.28)}
.logo-img{width:40px;height:40px;border-radius:50%;object-fit:contain;filter:drop-shadow(0 0 14px rgba(97,164,255,.65)) drop-shadow(0 0 22px rgba(255,209,102,.35));animation:logoPulse 4.5s ease-in-out infinite}
.logo small{color:var(--muted);font-weight:500;letter-spacing:1px;margin-left:6px;font-size:12px}
.nav{display:flex;gap:24px;font-size:14px;color:var(--muted)}
.nav a{transition:.2s}
.nav a:hover{color:#fff}
.top-cta{padding:10px 20px;border-radius:999px;font-size:13px}

.header{position:relative;text-align:center;padding:118px 20px 150px;overflow:hidden}
.header::before{content:"";position:absolute;inset:-40% 0 0 0;z-index:0;background:radial-gradient(680px 380px at 50% 0%,rgba(97,164,255,.30),transparent 72%)}
.header::after{content:"";position:absolute;inset:0;z-index:0;background-image:linear-gradient(rgba(185,200,230,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(185,200,230,.12) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(circle at 50% 32%,#000,transparent 80%)}
.header>*{position:relative;z-index:2}
.brand-line{display:inline-flex;align-items:center;gap:12px;margin-bottom:24px;font-size:13px;letter-spacing:.34em;color:var(--gold-2);text-transform:uppercase}
.brand-line::before,.brand-line::after{content:"";height:1px;width:54px;background:linear-gradient(90deg,transparent,rgba(255,209,102,.8))}
.header h1{font-size:clamp(54px,10vw,108px);font-weight:900;letter-spacing:10px;line-height:.98;margin-bottom:20px;color:#fff;background:linear-gradient(115deg,#fff 28%,#dfeaff 52%,#ffd166 78%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;filter:drop-shadow(0 18px 46px rgba(97,164,255,.26))}
.header .sub{font-size:clamp(18px,3.2vw,25px);color:#d9e4ff;font-weight:350;letter-spacing:3px}
.header .tagline{margin-top:28px;display:inline-block;padding:11px 24px;border:1px solid rgba(255,209,102,.32);border-radius:999px;color:var(--gold);font-size:14px;letter-spacing:3px;background:rgba(13,21,39,.64);backdrop-filter:blur(6px);box-shadow:0 18px 44px rgba(0,0,0,.32)}
.header .cta-row{margin-top:38px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:10px;padding:16px 34px;border-radius:999px;font-size:15px;font-weight:700;letter-spacing:1px;cursor:pointer;border:none;transition:.22s}
.btn-primary{background:linear-gradient(135deg,var(--gold) 0%,#f0a92e 100%);color:#1a1400;box-shadow:0 18px 46px rgba(255,209,102,.34)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 24px 56px rgba(255,209,102,.46)}
.btn-ghost{background:rgba(255,255,255,.04);color:var(--text);border:1px solid var(--line);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(97,164,255,.55)}
.hero-metrics{margin-top:42px;display:flex;gap:44px;justify-content:center;flex-wrap:wrap;color:var(--muted)}
.hero-metrics b{display:block;font-size:30px;color:#fff;margin-bottom:4px;letter-spacing:1px}
.hero-metrics span{font-size:13px;letter-spacing:1px}
.trust{margin-top:36px;display:flex;gap:20px;justify-content:center;align-items:center;flex-wrap:wrap;font-size:14px;color:var(--muted)}
.trust-label{font-size:12px;letter-spacing:.18em;color:var(--gold);text-transform:uppercase}
.trust-item{padding:7px 16px;border:1px solid var(--line);border-radius:999px;background:rgba(13,21,39,.62);backdrop-filter:blur(6px);letter-spacing:.06em}

@media (max-width:820px){
  .trust{gap:10px}
  .trust-item{font-size:12px}
}

@keyframes logoPulse{
  0%,100%{filter:drop-shadow(0 0 12px rgba(97,164,255,.55)) drop-shadow(0 0 18px rgba(255,209,102,.28))}
  50%{filter:drop-shadow(0 0 20px rgba(97,164,255,.85)) drop-shadow(0 0 30px rgba(255,209,102,.5))}
}

@media (max-width:820px){
  .logo-img{width:34px;height:34px}
}

.hero-logo{margin:0 auto 22px;width:118px;height:118px;position:relative;z-index:2;display:grid;place-items:center}
.hero-logo::before{content:"";position:absolute;width:150px;height:150px;border-radius:50%;background:radial-gradient(circle,rgba(97,164,255,.34),rgba(255,209,102,.16) 55%,transparent 72%);filter:blur(12px);animation:logoPulse 5.5s ease-in-out infinite}
.hero-logo img{position:relative;width:118px;height:118px;object-fit:contain;filter:drop-shadow(0 0 16px rgba(97,164,255,.7)) drop-shadow(0 0 26px rgba(255,209,102,.42));animation:logoPulse 5.5s ease-in-out infinite}

.container{max-width:1120px;margin:-70px auto 46px;padding:0 24px;position:relative;z-index:3}

.card-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;background:transparent;border:none;border-radius:0;overflow:visible;box-shadow:none;backdrop-filter:none;padding-top:34px}
.card-strip::before{display:none}
.card-strip-cell{position:relative;background:linear-gradient(180deg,rgba(12,20,40,.92),rgba(10,16,32,.86));border:1px solid var(--line);border-radius:18px;padding:34px 28px;transition:.26s;overflow:hidden}
.card-strip-cell::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,209,102,.65),transparent)}
.card-strip-cell:hover{transform:translateY(-6px);border-color:rgba(255,209,102,.34);box-shadow:0 28px 64px rgba(0,0,0,.52)}
.card-strip-cell .kicker{font-size:12px;letter-spacing:.32em;color:var(--gold);margin-bottom:14px}
.card-strip-cell h3{font-size:23px;font-weight:800;margin-bottom:10px;color:#fff}
.card-strip-cell p{font-size:15px;color:var(--muted)}
.card-strip-cell .icon{position:absolute;right:22px;top:24px;font-size:28px;opacity:.9;filter:drop-shadow(0 8px 14px rgba(0,0,0,.3))}

.section{margin-bottom:28px}
.section h2{font-size:30px;font-weight:800;margin-bottom:14px;color:#fff;letter-spacing:1.4px}
.section h2 .en{display:block;font-size:12px;font-weight:400;letter-spacing:.34em;color:var(--gold);margin-bottom:10px;text-transform:uppercase}
.section .lead{color:#dce7ff;font-size:16px;margin-bottom:14px;line-height:1.75}
.section p{color:var(--muted);font-size:15px;margin-bottom:12px;line-height:1.75}
.section p strong{color:var(--text);font-weight:700}

.panel{background:linear-gradient(180deg,rgba(12,20,40,.9),rgba(8,13,26,.82));border:1px solid var(--line);border-radius:22px;padding:46px;box-shadow:var(--shadow);margin-bottom:28px;position:relative;overflow:hidden}
.panel::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(97,164,255,.7),transparent)}
.panel h2{font-size:30px;font-weight:800;margin-bottom:18px;color:#fff;letter-spacing:1px}
.panel h2 .en{display:block;font-size:12px;font-weight:400;letter-spacing:.3em;color:var(--gold);margin-bottom:8px;text-transform:uppercase}
.panel p{color:var(--muted);font-size:15px;margin-bottom:12px;line-height:1.75}
.panel p strong{color:var(--text);font-weight:700}
.panel .lead{color:#dce7ff;font-size:16px;line-height:1.75}

.cases,.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:28px}
.case-item{background:linear-gradient(180deg,rgba(12,20,40,.9),rgba(8,13,26,.82));border:1px solid var(--line);border-radius:18px;padding:28px 24px;transition:.24s;position:relative;overflow:hidden}
.case-item::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(97,164,255,.48),transparent)}
.case-item:hover{transform:translateY(-5px);border-color:rgba(97,164,255,.45);box-shadow:0 28px 64px rgba(0,0,0,.52)}
.case-item .c-tag{display:inline-block;background:linear-gradient(135deg,rgba(255,209,102,.28),rgba(255,209,102,.08));color:var(--gold-2);border:1px solid rgba(255,209,102,.4);font-size:11px;font-weight:700;letter-spacing:1px;padding:3px 11px;border-radius:999px;margin-bottom:13px}
.case-item h3{display:block;font-size:20px;color:#fff;margin-bottom:12px;font-weight:800;letter-spacing:.5px}
.case-item p{font-size:14px;color:var(--muted);line-height:1.7;margin:0 0 10px}
.case-item p:last-child{margin-bottom:0}
.case-item p b{color:#e6eeff;font-weight:700}
.case-item .c-pain b{color:var(--teal)}
.case-item .c-do b{color:var(--gold)}
.case-item .c-eff b{color:var(--blue)}

.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:34px}
.flow-step{position:relative;background:linear-gradient(180deg,rgba(12,20,40,.9),rgba(8,13,26,.82));border:1px solid var(--line);border-radius:16px;padding:26px 22px;transition:.24s}
.flow-step::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(97,164,255,.5),transparent)}
.flow-step:hover{transform:translateY(-4px);border-color:rgba(97,164,255,.45);box-shadow:0 24px 56px rgba(0,0,0,.5)}
.flow-step b{font-size:11px;letter-spacing:.28em;color:var(--gold);text-transform:uppercase}
.flow-step h4{font-size:19px;font-weight:800;margin:10px 0 8px;color:#fff;letter-spacing:.5px}
.flow-step p{font-size:14px;color:var(--muted);line-height:1.65}
.flow-step::after{content:"→";position:absolute;right:-13px;top:42%;color:var(--gold);font-size:18px;z-index:2}
.flow-step:last-child::after{content:""}

.offer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:34px}
.offer-item{background:linear-gradient(180deg,rgba(12,20,40,.9),rgba(8,13,26,.82));border:1px solid var(--line);border-radius:16px;padding:24px 20px;transition:.22s}
.offer-item:hover{transform:translateY(-4px);border-color:rgba(97,164,255,.45);box-shadow:0 22px 52px rgba(0,0,0,.5)}
.offer-item .o-tag{display:inline-block;background:linear-gradient(135deg,rgba(97,164,255,.28),rgba(97,164,255,.08));color:#cfe2ff;border:1px solid rgba(97,164,255,.4);font-size:11px;font-weight:700;letter-spacing:.5px;padding:3px 11px;border-radius:999px;margin-bottom:12px}
.offer-item h4{font-size:17px;font-weight:800;margin:0 0 8px;color:#fff}
.offer-item p{font-size:13.5px;color:var(--muted);line-height:1.65}

.chips{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:34px}
.chip{border:1px solid var(--line);background:linear-gradient(180deg,rgba(12,20,40,.9),rgba(8,13,26,.82));border-radius:999px;padding:12px 26px;font-size:15px;color:var(--text);letter-spacing:.4px}
.chip b{color:var(--gold);font-weight:700;margin-right:6px}

.about-box{display:grid;grid-template-columns:200px 1fr;gap:40px;align-items:center;background:linear-gradient(135deg,rgba(12,20,40,.9),rgba(8,13,26,.82));border:1px solid var(--line);border-radius:22px;padding:46px;box-shadow:var(--shadow);margin-top:30px;position:relative;overflow:hidden}
.about-box::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,209,102,.5),transparent)}
.about-ava{width:200px;height:200px;display:grid;place-items:center;position:relative}
.about-ava::before{content:"";position:absolute;width:200px;height:200px;border-radius:50%;background:radial-gradient(circle,rgba(97,164,255,.4),rgba(255,209,102,.2) 55%,transparent 74%);filter:blur(14px)}
.about-ava img{position:relative;width:160px;height:160px;object-fit:contain;filter:drop-shadow(0 0 14px rgba(97,164,255,.55))}
.about-text .about-role{font-size:14px;color:var(--gold);font-weight:700;letter-spacing:.5px;margin:0 0 14px}
.about-text p{color:var(--muted);font-size:15px;line-height:1.8;margin:0 0 12px}
.about-text .about-goal{color:#d9e4ff;font-weight:600;border-left:2px solid var(--gold);padding-left:14px;font-size:15px}

.tech{background:linear-gradient(180deg,transparent,rgba(97,164,255,.05),transparent)}
.shead{text-align:center;margin:0 auto 18px;max-width:760px}
.shead .en{display:block;font-size:12px;font-weight:400;letter-spacing:.34em;color:var(--gold);margin-bottom:10px;text-transform:uppercase}
.shead h2{font-size:32px;font-weight:800;margin:0 0 14px;color:#fff;letter-spacing:1.4px}
.shead p{color:var(--muted);font-size:16px;margin:0 auto;line-height:1.75}

/* 滚动淡入: .in 状态必须显式恢复不透明, 否则内容永久隐藏 */
.section,.panel,.card-strip,.flow,.cases,.offer-grid,.chips,.about-box,
.card-strip-cell,.case-item,.offer-item,.flow-step,.chip{
  opacity:1 !important;transform:none !important;
}
@media (prefers-reduced-motion:no-preference){
  html.js .section,html.js .panel,html.js .card-strip,html.js .flow,html.js .cases,html.js .offer-grid,html.js .chips,html.js .about-box{
    opacity:0 !important;transform:translateY(28px) !important;
    transition:opacity .7s ease, transform .7s ease;
  }
  html.js .card-strip-cell,html.js .case-item,html.js .offer-item,html.js .flow-step,html.js .chip{opacity:0 !important;transition:opacity .5s ease}
  html.js .section.in,html.js .panel.in,html.js .card-strip.in,html.js .flow.in,html.js .cases.in,html.js .offer-grid.in,html.js .chips.in,html.js .about-box.in{opacity:1 !important;transform:none !important}
  html.js .card-strip-cell.in,html.js .case-item.in,html.js .offer-item.in,html.js .flow-step.in,html.js .chip.in{opacity:1 !important}
}


.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:32px;align-items:start}
.contact-info{display:flex;flex-direction:column;gap:16px}
.contact-info .row{display:flex;gap:14px;align-items:flex-start}
.contact-info .dot{width:9px;height:9px;border-radius:50%;background:var(--gold);margin-top:8px;box-shadow:0 0 18px var(--gold);flex-shrink:0}
.contact-info .lbl{font-size:13px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase;margin-bottom:3px}
.contact-info .val{font-size:17px;color:var(--text);font-weight:600}

.lead-form{margin:0;display:grid;gap:14px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-row.full{grid-template-columns:1fr}
.field label{display:block;font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:6px;text-transform:uppercase}
.lead-form input,.lead-form textarea{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:12px;font-size:15px;font-family:inherit;background:rgba(4,7,15,.62);color:var(--text);transition:.18s}
.lead-form input::placeholder,.lead-form textarea::placeholder{color:#6e80a5}
.lead-form input:focus,.lead-form textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px rgba(97,164,255,.18)}
.lead-form textarea{resize:vertical}
.lead-form button{background:linear-gradient(135deg,var(--gold) 0%,#f0a92e 100%);color:#1a1400;border:none;border-radius:12px;padding:15px;font-size:16px;font-weight:800;cursor:pointer;letter-spacing:1px;transition:.22s;box-shadow:0 18px 44px rgba(255,209,102,.28)}
.lead-form button:hover{transform:translateY(-1px);box-shadow:0 22px 54px rgba(255,209,102,.4)}
.lead-form button:disabled{background:#3a455f;cursor:wait}
.form-msg{font-size:14px;margin-top:4px}
.form-msg.ok{color:var(--teal)}
.form-msg.err{color:#ff7b7b}

footer{position:relative;text-align:center;padding:54px 24px 34px;color:#7a8aad;font-size:13px;letter-spacing:.12em;background:linear-gradient(180deg,rgba(4,6,14,0),rgba(4,6,14,.78))}
footer::before{content:"";position:absolute;inset:0 0 auto 0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,209,102,.45),transparent)}
footer .brand{color:var(--gold);font-weight:700;letter-spacing:3px}

@media (max-width:820px){
  .topbar-inner{padding:14px 16px}
  .nav{display:none}
  .card-strip,.cases,.pricing,.contact-grid,.form-row{grid-template-columns:1fr}
  .flow,.offer-grid{grid-template-columns:1fr}
  .flow-step::after{content:""}
  .about-box{grid-template-columns:1fr;gap:24px;padding:30px 22px}
  .about-ava{width:140px;height:140px}
  .about-ava img{width:110px;height:110px}
  .card-strip{padding-top:24px}
  .panel{padding:30px 22px}
  .cases,.pricing{margin-top:28px}
  .header{padding:102px 16px 120px}
  .hero-metrics{gap:26px;margin-top:34px}
}

/* ==== upgrade 20261018: a11y + focus ==== */
.skip-link{position:absolute;left:-9999px;top:0;z-index:999;background:#00E6B3;color:#04060e;padding:10px 16px;border-radius:0 0 10px 0;font-weight:700;text-decoration:none}
.skip-link:focus{left:0}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid #00E6B3;outline-offset:2px;border-radius:6px}
img{max-width:100%;height:auto}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}