/* ============================================================
   璇麦网络 · 全新官网  |  style.css
   深色科技 / 玻璃拟态 / 卡片式 / 强动画
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  --bg:            #06080f;
  --bg-soft:       #0a0e1a;
  --surface:       rgba(255,255,255,.038);
  --surface-2:     rgba(255,255,255,.062);
  --line:          rgba(255,255,255,.085);
  --line-strong:   rgba(255,255,255,.16);

  --text:          #e9eefb;
  --text-sub:      #98a3bd;
  --text-dim:      #6a7590;

  --brand:         #4f7dff;
  --brand-2:       #a259ff;
  --brand-3:       #22d3ee;
  --brand-4:       #ff6b9d;

  --grad-main:     linear-gradient(120deg, #4f7dff 0%, #a259ff 50%, #22d3ee 100%);
  --grad-text:     linear-gradient(100deg, #8fb0ff 0%, #c9a3ff 40%, #6ee7f9 70%, #8fb0ff 100%);
  --grad-brand:    linear-gradient(135deg, #4f7dff, #a259ff);
  --grad-brand-2:  linear-gradient(135deg, #a259ff, #ff6b9d);
  --grad-card:     linear-gradient(160deg, rgba(79,125,255,.14), rgba(162,89,255,.07) 45%, transparent 75%);

  --shadow-sm:     0 4px 20px rgba(0,0,0,.4);
  --shadow-md:     0 18px 50px -12px rgba(0,0,0,.65);
  --shadow-lg:     0 40px 90px -25px rgba(0,0,0,.8);
  --glow:          0 0 0 1px rgba(79,125,255,.35), 0 18px 60px -18px rgba(79,125,255,.55);

  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 26px;
  --r-xl: 34px;

  --ease: cubic-bezier(.22,.68,0,1);
  --ease-out: cubic-bezier(.16,1,.3,1);

  --nav-h: 76px;
  --maxw: 1240px;
}

/* ---------- Reset ---------- */
*,*::before,*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  letter-spacing: .01em;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button,input,textarea,select { font: inherit; color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4,h5 { margin: 0; font-weight: 700; line-height: 1.25; letter-spacing: -.02em; }
p { margin: 0; }
::selection { background: rgba(79,125,255,.35); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #05070d; }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg,#3a5fb0,#7a3fc0); border-radius: 20px; border: 2px solid #05070d; }
::-webkit-scrollbar-thumb:hover { background: linear-gradient(180deg,#5b85ff,#a259ff); }

/* ---------- 全局背景层 ---------- */
.bg-fx { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 75%);
}
.bg-orb {
  position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: .5;
  animation: orbFloat 22s ease-in-out infinite alternate;
}
.bg-orb.a { width: 620px; height: 620px; top: -220px; left: -160px; background: radial-gradient(circle,#2f5cff,transparent 65%); }
.bg-orb.b { width: 560px; height: 560px; top: 120px; right: -180px; background: radial-gradient(circle,#9333ea,transparent 65%); animation-delay: -7s; }
.bg-orb.c { width: 520px; height: 520px; bottom: -160px; left: 38%; background: radial-gradient(circle,#06b6d4,transparent 68%); animation-delay: -13s; }
@keyframes orbFloat {
  0%   { transform: translate3d(0,0,0) scale(1); }
  50%  { transform: translate3d(60px,-50px,0) scale(1.12); }
  100% { transform: translate3d(-40px,40px,0) scale(.95); }
}
.noise {
  position: fixed; inset: 0; z-index: 1; pointer-events: none; opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* 鼠标光晕 */
.cursor-glow {
  position: fixed; width: 480px; height: 480px; z-index: 2; pointer-events: none;
  left: 0; top: 0; margin: -240px 0 0 -240px;
  background: radial-gradient(circle, rgba(96,140,255,.14), transparent 62%);
  transform: translate3d(-1000px,-1000px,0);
  transition: opacity .4s;
}
.cursor-dot, .cursor-ring {
  position: fixed; z-index: 9998; pointer-events: none; border-radius: 50%;
  left: 0; top: 0; transform: translate3d(-100px,-100px,0);
}
.cursor-dot { width: 6px; height: 6px; margin:-3px 0 0 -3px; background: var(--brand-3); box-shadow: 0 0 12px var(--brand-3); }
.cursor-ring {
  width: 34px; height: 34px; margin:-17px 0 0 -17px;
  border: 1.5px solid rgba(120,160,255,.5);
  transition: width .25s var(--ease), height .25s var(--ease), border-color .25s, background .25s, margin .25s var(--ease), opacity .3s;
}
.cursor-ring.hot { width: 60px; height: 60px; margin:-30px 0 0 -30px; border-color: rgba(162,89,255,.85); background: rgba(162,89,255,.08); }
@media (hover:none),(max-width:900px){ .cursor-glow,.cursor-dot,.cursor-ring{ display:none; } }

/* ---------- 滚动进度 ---------- */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%; z-index: 9999;
  background: var(--grad-main); box-shadow: 0 0 18px rgba(79,125,255,.7);
  transition: width .1s linear;
}

/* ---------- 布局容器 ---------- */
.wrap { width: min(var(--maxw), calc(100% - 48px)); margin-inline: auto; position: relative; z-index: 3; }
@media (max-width:640px){ .wrap { width: calc(100% - 32px); } }
section { position: relative; z-index: 3; }
.sec { padding: 130px 0; }
.sec-sm { padding: 90px 0; }
@media (max-width:900px){ .sec { padding: 84px 0; } .sec-sm { padding: 60px 0; } }

/* ---------- 通用标题 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: .28em; text-transform: uppercase;
  color: #9db4ff; font-weight: 600; margin-bottom: 20px;
}
.eyebrow::before {
  content:""; width: 26px; height: 1px; background: linear-gradient(90deg,transparent,#6c8fff);
}
.eyebrow .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--brand-3); box-shadow: 0 0 12px var(--brand-3); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.35;transform:scale(.7)} }

.sec-title {
  font-size: clamp(30px, 4.4vw, 52px); font-weight: 800; line-height: 1.2;
  margin-bottom: 20px;
}
.sec-title .grad {
  background: var(--grad-main); -webkit-background-clip: text; background-clip: text; color: transparent;
  background-size: 200% auto; animation: gradShift 6s linear infinite;
}
@keyframes gradShift { to { background-position: 200% center; } }
.sec-desc { color: var(--text-sub); font-size: clamp(15px,1.6vw,17px); max-width: 620px; line-height: 1.85; }
.sec-head.center { text-align: center; }
.sec-head.center .sec-desc { margin-inline: auto; }
.sec-head.center .eyebrow { justify-content: center; }

/* ---------- 按钮 ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 30px; border-radius: 100px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; overflow: hidden;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), background .3s, color .3s, border-color .3s;
  white-space: nowrap; isolation: isolate;
}
.btn-primary { background: var(--grad-brand); color:#fff; box-shadow: 0 14px 40px -14px rgba(89,110,255,.85); }
.btn-primary:hover { transform: translateY(-4px); box-shadow: 0 22px 55px -14px rgba(120,110,255,.95); }
.btn-ghost { border-color: var(--line-strong); color: var(--text); background: rgba(255,255,255,.03); }
.btn-ghost:hover { transform: translateY(-4px); border-color: rgba(140,170,255,.55); background: rgba(255,255,255,.06); box-shadow: var(--shadow-md); }
.btn svg { width: 16px; height: 16px; transition: transform .4s var(--ease); }
.btn:hover svg { transform: translateX(4px); }
/* 流光 */
.btn-primary::after {
  content:""; position:absolute; inset:0; z-index:-1; opacity:0; transition: opacity .4s;
  background: radial-gradient(120px 60px at var(--mx,50%) var(--my,50%), rgba(255,255,255,.4), transparent 70%);
}
.btn-primary:hover::after { opacity: 1; }
/* 扫光 */
.btn::before {
  content:""; position:absolute; top:0; left:-120%; width:60%; height:100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.28), transparent);
  transform: skewX(-18deg); transition: left .7s var(--ease);
}
.btn:hover::before { left: 130%; }

/* 箭头链接 */
.arrow-link {
  display: inline-flex; align-items: center; gap: 8px; color: #9db4ff;
  font-size: 15px; font-weight: 600; position: relative; padding-bottom: 3px;
}
.arrow-link::after {
  content:""; position:absolute; left:0; bottom:0; height:1px; width:0; background: var(--grad-main);
  transition: width .5s var(--ease);
}
.arrow-link:hover::after { width: 100%; }
.arrow-link svg { transition: transform .45s var(--ease); }
.arrow-link:hover svg { transform: translateX(5px); }

/* ---------- 玻璃卡 ---------- */
.glass {
  position: relative; border-radius: var(--r-lg);
  background: var(--surface); border: 1px solid var(--line);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  overflow: hidden; transition: transform .55s var(--ease), border-color .45s, box-shadow .55s var(--ease);
}
.glass::before {
  content:""; position:absolute; inset:0; opacity:0; transition: opacity .5s; pointer-events:none;
  background: radial-gradient(420px circle at var(--mx,50%) var(--my,50%), rgba(90,130,255,.16), transparent 62%);
}
.glass:hover::before { opacity: 1; }
.glass:hover { border-color: rgba(140,170,255,.34); box-shadow: var(--shadow-md); }

/* ---------- 进场动画 ---------- */
[data-reveal] { opacity: 0; transform: translateY(38px); }
[data-reveal="left"]  { transform: translateX(-46px); }
[data-reveal="right"] { transform: translateX(46px); }
[data-reveal="scale"] { transform: scale(.9); }
[data-reveal="fade"]  { transform: none; }
[data-reveal].in {
  opacity: 1; transform: none;
  transition: opacity .95s var(--ease-out), transform .95s var(--ease-out);
  transition-delay: var(--d, 0ms);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity:1 !important; transform:none !important; }
  * { animation-duration: .01ms !important; }
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h); z-index: 900;
  display: flex; align-items: center;
  transition: height .4s var(--ease), background .4s, border-color .4s, backdrop-filter .4s;
  border-bottom: 1px solid transparent;
}
.nav.solid {
  height: 66px;
  background: rgba(8,11,20,.72);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border-bottom-color: var(--line);
}
.nav.hide { transform: translateY(-100%); }
.nav-inner { width: min(var(--maxw), calc(100% - 48px)); margin-inline: auto; display: flex; align-items: center; gap: 40px; }
@media (max-width:640px){ .nav-inner { width: calc(100% - 32px); } }

.logo { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 19px; letter-spacing: -.02em; flex-shrink: 0; }
.logo-mark {
  width: 40px; height: 40px; border-radius: 12px; position: relative; flex-shrink: 0;
  background: var(--grad-brand); display: grid; place-items: center;
  box-shadow: 0 8px 26px -8px rgba(89,110,255,.9);
  transition: transform .6s var(--ease), box-shadow .5s;
}
.logo:hover .logo-mark { transform: rotate(-10deg) scale(1.08); box-shadow: 0 12px 34px -8px rgba(162,89,255,1); }
.logo-mark span { font-size: 17px; font-weight: 900; color:#fff; }
.logo-mark::after {
  content:""; position:absolute; inset:-4px; border-radius: 15px; border:1px solid rgba(140,170,255,.35);
  opacity:0; transition: opacity .4s;
}
.logo:hover .logo-mark::after { opacity: 1; }
.logo-txt small { display:block; font-size: 10px; letter-spacing: .18em; color: var(--text-dim); font-weight: 500; margin-top: -2px; }

.nav-menu { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-menu a {
  position: relative; padding: 9px 16px; font-size: 15px; font-weight: 500; color: var(--text-sub);
  border-radius: 10px; transition: color .3s, background .3s;
}
.nav-menu a::after {
  content:""; position:absolute; left: 16px; right:16px; bottom: 3px; height: 2px; border-radius: 2px;
  background: var(--grad-main); transform: scaleX(0); transform-origin: left;
  transition: transform .45s var(--ease);
}
.nav-menu a:hover { color: #fff; }
.nav-menu a:hover::after, .nav-menu a.active::after { transform: scaleX(1); }
.nav-menu a.active { color: #fff; }
.nav-cta { margin-left: 14px; }

.burger {
  display: none; width: 44px; height: 44px; border-radius: 12px; margin-left: auto;
  border: 1px solid var(--line); background: var(--surface); cursor: pointer;
  position: relative; flex-shrink: 0;
}
.burger i {
  position: absolute; left: 12px; width: 20px; height: 2px; background: var(--text); border-radius: 2px;
  transition: transform .4s var(--ease), opacity .3s;
}
.burger i:nth-child(1){ top: 15px; }
.burger i:nth-child(2){ top: 21px; }
.burger i:nth-child(3){ top: 27px; }
.burger.on i:nth-child(1){ transform: translateY(6px) rotate(45deg); }
.burger.on i:nth-child(2){ opacity: 0; }
.burger.on i:nth-child(3){ transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 980px) {
  .burger { display: block; }
  .nav-menu {
    position: fixed; top: var(--nav-h); left: 0; right: 0; flex-direction: column; align-items: stretch;
    gap: 2px; padding: 18px 20px 26px; margin: 0;
    background: rgba(8,11,20,.96); backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-14px); opacity: 0; pointer-events: none;
    transition: transform .45s var(--ease), opacity .35s;
  }
  .nav-menu.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-menu a { padding: 14px 12px; font-size: 16px; border-radius: 12px; }
  .nav-menu a::after { display: none; }
  .nav-menu a:hover, .nav-menu a.active { background: rgba(255,255,255,.05); }
  .nav-cta { margin: 10px 0 0; }
  .nav-cta .btn { width: 100%; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center; padding: calc(var(--nav-h) + 40px) 0 90px; overflow: hidden;
}
#heroCanvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; opacity: .85; }
.hero-inner { position: relative; z-index: 4; text-align: center; max-width: 980px; margin-inline: auto; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 10px; padding: 8px 18px 8px 8px;
  border-radius: 100px; border: 1px solid var(--line-strong); background: rgba(255,255,255,.045);
  backdrop-filter: blur(12px); font-size: 13.5px; color: var(--text-sub); margin-bottom: 34px;
}
.hero-badge b {
  padding: 3px 11px; border-radius: 100px; background: var(--grad-brand); color:#fff;
  font-size: 11.5px; font-weight: 700; letter-spacing: .06em;
}
.hero-badge .live { width: 7px; height: 7px; border-radius: 50%; background: #34d399; box-shadow: 0 0 10px #34d399; animation: pulse 1.8s infinite; }

.hero h1 { font-size: clamp(38px, 7vw, 84px); line-height: 1.08; font-weight: 900; letter-spacing: -.035em; margin-bottom: 30px; }
.hero h1 .ln { display: block; overflow: hidden; }
.hero h1 .ln > span { display: block; transform: translateY(110%); animation: riseUp 1.1s var(--ease-out) forwards; }
.hero h1 .ln:nth-child(1) > span { animation-delay: .15s; }
.hero h1 .ln:nth-child(2) > span { animation-delay: .3s; }
@keyframes riseUp { to { transform: translateY(0); } }
.hero h1 .gr {
  background: var(--grad-text); background-size: 220% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: gradShift 7s linear infinite;
}
.hero-sub {
  font-size: clamp(16px, 2vw, 20px); color: var(--text-sub); max-width: 660px; margin: 0 auto 44px;
  line-height: 1.85; opacity: 0; animation: fadeUp 1s var(--ease-out) .6s forwards;
}
@keyframes fadeUp { from { opacity:0; transform: translateY(26px);} to { opacity:1; transform:none; } }

.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 66px; opacity: 0; animation: fadeUp 1s var(--ease-out) .78s forwards; }

/* Hero 数据条 */
.hero-stats {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 1px;
  border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden;
  background: var(--line); opacity: 0; animation: fadeUp 1s var(--ease-out) .95s forwards;
}
.hero-stats .st {
  background: rgba(10,14,26,.62); backdrop-filter: blur(14px);
  padding: 26px 16px; text-align: center; transition: background .4s;
}
.hero-stats .st:hover { background: rgba(30,40,72,.7); }
.hero-stats .num {
  font-size: clamp(26px,3.4vw,40px); font-weight: 900; letter-spacing: -.03em; line-height: 1.1;
  background: var(--grad-main); -webkit-background-clip: text; background-clip: text; color: transparent;
  font-variant-numeric: tabular-nums;
}
.hero-stats .lbl { font-size: 13px; color: var(--text-dim); margin-top: 6px; letter-spacing: .06em; }
@media (max-width:760px){ .hero-stats { grid-template-columns: repeat(2,1fr); } }

/* 滚动提示 */
.scroll-hint { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 4; text-align: center; }
.scroll-hint span { font-size: 11px; letter-spacing: .3em; color: var(--text-dim); text-transform: uppercase; }
.scroll-hint .mouse {
  width: 22px; height: 34px; border: 1.5px solid var(--line-strong); border-radius: 12px; margin: 10px auto 0; position: relative;
}
.scroll-hint .mouse::after {
  content:""; position:absolute; left: 50%; top: 7px; width: 3px; height: 7px; margin-left:-1.5px;
  background: var(--brand-3); border-radius: 3px; animation: wheel 1.8s var(--ease) infinite;
}
@keyframes wheel { 0%{opacity:0;transform:translateY(0)} 25%{opacity:1} 75%{opacity:0;transform:translateY(12px)} 100%{opacity:0} }
@media (max-width:760px){ .scroll-hint { display:none; } }

/* ============================================================
   通用网格
   ============================================================ */
.grid { display: grid; gap: 22px; }
.g-2 { grid-template-columns: repeat(2,1fr); }
.g-3 { grid-template-columns: repeat(3,1fr); }
.g-4 { grid-template-columns: repeat(4,1fr); }
@media (max-width:1000px){
  .g-4 { grid-template-columns: repeat(2,1fr); }
  .g-3 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width:680px){
  .g-4,.g-3,.g-2 { grid-template-columns: 1fr; }
}

/* ============================================================
   服务卡片
   ============================================================ */
.svc-card { padding: 34px 30px 30px; cursor: pointer; }
.svc-card .ico {
  width: 62px; height: 62px; border-radius: 18px; display: grid; place-items: center; font-size: 28px;
  background: var(--grad-card); border: 1px solid var(--line-strong); margin-bottom: 24px;
  transition: transform .6s var(--ease), box-shadow .5s, border-color .4s;
}
.svc-card:hover .ico { transform: translateY(-6px) rotate(-8deg) scale(1.06); border-color: rgba(140,170,255,.5); box-shadow: 0 14px 34px -12px rgba(79,125,255,.8); }
.svc-card h3 { font-size: 20px; margin-bottom: 12px; letter-spacing: -.01em; }
.svc-card p { color: var(--text-sub); font-size: 14.6px; line-height: 1.8; }
.svc-card .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.svc-card .tags span {
  font-size: 12px; padding: 5px 11px; border-radius: 8px; color: var(--text-dim);
  background: rgba(255,255,255,.04); border: 1px solid var(--line);
  transition: color .3s, border-color .3s, background .3s, transform .35s var(--ease);
}
.svc-card:hover .tags span { color: #b9c8ec; border-color: rgba(140,170,255,.28); }
.svc-card .tags span:hover { transform: translateY(-3px); background: rgba(79,125,255,.16); color:#fff; }
.svc-card .corner {
  position: absolute; right: 22px; top: 22px; width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center; color: var(--text-dim);
  border: 1px solid var(--line); opacity: 0; transform: translate(-6px,6px);
  transition: all .5s var(--ease);
}
.svc-card:hover .corner { opacity: 1; transform: none; color: #9db4ff; border-color: rgba(140,170,255,.4); }

/* ============================================================
   优势卡
   ============================================================ */
.adv-card { padding: 32px 28px; }
.adv-card .no {
  font-size: 46px; font-weight: 900; line-height: 1; letter-spacing: -.05em; margin-bottom: 20px;
  background: linear-gradient(180deg, rgba(255,255,255,.22), rgba(255,255,255,.02));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  transition: transform .5s var(--ease);
}
.adv-card:hover .no { transform: translateX(6px) scale(1.04); }
.adv-card .ic { font-size: 26px; margin-bottom: 14px; display: block; transition: transform .5s var(--ease); }
.adv-card:hover .ic { transform: scale(1.18) rotate(-6deg); }
.adv-card h3 { font-size: 19px; margin-bottom: 10px; }
.adv-card p { font-size: 14.5px; color: var(--text-sub); line-height: 1.8; }
.adv-card .line-b {
  position: absolute; left: 0; bottom: 0; height: 2px; width: 0; background: var(--grad-main);
  transition: width .6s var(--ease);
}
.adv-card:hover .line-b { width: 100%; }

/* ============================================================
   流程时间线
   ============================================================ */
.flow { position: relative; display: grid; grid-template-columns: repeat(6,1fr); gap: 0; }
.flow::before {
  content:""; position: absolute; left: 0; right: 0; top: 27px; height: 2px;
  background: linear-gradient(90deg, rgba(79,125,255,.7), rgba(162,89,255,.7), rgba(34,211,238,.7));
  transform: scaleX(var(--p,0)); transform-origin: left; transition: transform 1.8s var(--ease-out);
}
.flow-item { text-align: center; padding: 0 10px; position: relative; }
.flow-item .node {
  width: 56px; height: 56px; margin: 0 auto 22px; border-radius: 50%; display: grid; place-items: center;
  background: #0a0e1a; border: 2px solid var(--line-strong); font-weight: 800; font-size: 17px;
  position: relative; z-index: 2; transition: all .5s var(--ease);
}
.flow-item:hover .node { border-color: var(--brand); color: #fff; transform: scale(1.14); box-shadow: 0 0 0 8px rgba(79,125,255,.1); }
.flow-item h4 { font-size: 15.5px; margin-bottom: 8px; }
.flow-item p { font-size: 13px; color: var(--text-dim); line-height: 1.7; }
@media (max-width:1000px){
  .flow { grid-template-columns: repeat(3,1fr); row-gap: 42px; }
  .flow::before { display: none; }
}
@media (max-width:560px){ .flow { grid-template-columns: repeat(2,1fr); } }

/* ============================================================
   技术栈 marquee
   ============================================================ */
.marquee { overflow: hidden; position: relative; padding: 18px 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; gap: 16px; width: max-content; animation: slide 38s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee.reverse .marquee-track { animation-direction: reverse; animation-duration: 46s; }
@keyframes slide { to { transform: translateX(-50%); } }
.chip {
  padding: 11px 22px; border-radius: 100px; font-size: 14.5px; font-weight: 600; white-space: nowrap;
  background: var(--surface); border: 1px solid var(--line); color: var(--text-sub);
  transition: color .3s, border-color .3s, background .3s, transform .35s var(--ease);
}
.chip:hover { color:#fff; border-color: rgba(140,170,255,.5); background: rgba(79,125,255,.14); transform: translateY(-4px); }

/* ============================================================
   案例卡（翻转）
   ============================================================ */
.case-card { perspective: 1400px; height: 320px; cursor: pointer; }
.case-in {
  position: relative; width: 100%; height: 100%; transform-style: preserve-3d;
  transition: transform .85s var(--ease);
}
.case-card:hover .case-in, .case-card.flip .case-in { transform: rotateY(180deg); }
.case-face {
  position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border-radius: var(--r-lg); border: 1px solid var(--line); overflow: hidden; padding: 30px;
  display: flex; flex-direction: column; transition: border-color .45s, box-shadow .5s;
}
.case-card:hover .case-face { border-color: rgba(140,170,255,.32); box-shadow: var(--shadow-md); }
.case-front { background: var(--grad-card), rgba(10,14,26,.9); }
.case-back  { background: linear-gradient(150deg, rgba(79,125,255,.24), rgba(162,89,255,.16)), rgba(10,14,26,.96); transform: rotateY(180deg); justify-content: center; }
.case-face .cat { font-size: 12px; letter-spacing: .18em; color: #9db4ff; font-weight: 700; text-transform: uppercase; }
.case-face h3 { font-size: 22px; margin: 14px 0 12px; }
.case-face p { font-size: 14px; color: var(--text-sub); line-height: 1.8; }
.case-front .foot { margin-top: auto; display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-dim); }
.case-front .thumb {
  position: absolute; right: -40px; top: -40px; width: 170px; height: 170px; border-radius: 50%;
  background: radial-gradient(circle, rgba(79,125,255,.3), transparent 68%); filter: blur(6px);
  transition: transform .7s var(--ease);
}
.case-card:hover .thumb { transform: scale(1.3) translate(-10px,10px); }
.case-back ul { display: grid; gap: 10px; margin-bottom: 22px; }
.case-back li { font-size: 14px; color: #c3cfe8; display: flex; gap: 9px; align-items: flex-start; }
.case-back li::before { content:"▸"; color: var(--brand-3); flex-shrink: 0; }

/* 过滤器 */
.filters { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin: 34px 0 46px; }
.filter {
  padding: 9px 20px; border-radius: 100px; font-size: 14px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--line); background: var(--surface); color: var(--text-sub);
  transition: all .4s var(--ease);
}
.filter:hover { color:#fff; border-color: rgba(140,170,255,.4); transform: translateY(-2px); }
.filter.on { background: var(--grad-brand); color:#fff; border-color: transparent; box-shadow: 0 12px 30px -12px rgba(89,110,255,.9); }
.case-item.hide { display: none; }

/* ============================================================
   CTA 区块
   ============================================================ */
.cta-box {
  position: relative; border-radius: var(--r-xl); padding: 76px 40px; text-align: center; overflow: hidden;
  border: 1px solid var(--line-strong);
  background: linear-gradient(140deg, rgba(79,125,255,.18), rgba(162,89,255,.12) 45%, rgba(34,211,238,.1));
  backdrop-filter: blur(20px);
}
.cta-box::before, .cta-box::after {
  content:""; position:absolute; border-radius: 50%; filter: blur(70px); pointer-events:none;
}
.cta-box::before { width: 420px; height: 420px; left: -140px; top: -180px; background: rgba(79,125,255,.4); animation: orbFloat 16s ease-in-out infinite alternate; }
.cta-box::after  { width: 380px; height: 380px; right: -120px; bottom: -170px; background: rgba(162,89,255,.36); animation: orbFloat 20s ease-in-out infinite alternate-reverse; }
.cta-box h2 { font-size: clamp(28px,4vw,46px); font-weight: 900; margin-bottom: 18px; letter-spacing: -.03em; }
.cta-box p { color: #c3cfe8; max-width: 560px; margin: 0 auto 34px; font-size: 16.5px; }
.cta-box .btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 2; }
@media (max-width:640px){ .cta-box { padding: 52px 22px; } }

/* ============================================================
   ABOUT
   ============================================================ */
.ab-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; }
@media (max-width:960px){ .ab-grid { grid-template-columns: 1fr; gap: 40px; } }
.ab-visual { position: relative; }
.ab-card-stack { position: relative; height: 400px; }
.ab-float {
  position: absolute; border-radius: var(--r-lg); padding: 20px 24px;
  background: rgba(12,17,32,.85); border: 1px solid var(--line); backdrop-filter: blur(18px);
  box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 14px;
  animation: floatY 7s ease-in-out infinite;
}
.ab-float:nth-child(1){ top: 4%;  left: 0;  animation-delay: 0s; }
.ab-float:nth-child(2){ top: 34%; right: 2%; animation-delay: -2.3s; }
.ab-float:nth-child(3){ top: 66%; left: 6%;  animation-delay: -4.6s; }
@keyframes floatY { 0%,100%{ transform: translateY(0) rotate(-.6deg);} 50%{ transform: translateY(-16px) rotate(.8deg);} }
.ab-float .fi { width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center; font-size: 20px; background: var(--grad-card); border:1px solid var(--line-strong); flex-shrink: 0; }
.ab-float strong { display: block; font-size: 15px; }
.ab-float small { color: var(--text-dim); font-size: 12.5px; }
.ab-ring {
  position:absolute; inset: 8% 18%; border-radius: 50%;
  border: 1px dashed rgba(140,170,255,.22); animation: spin 40s linear infinite;
}
.ab-ring:nth-of-type(2){ inset: -2% 10%; animation-duration: 55s; animation-direction: reverse; border-style: solid; border-color: rgba(162,89,255,.12); }
@keyframes spin { to { transform: rotate(360deg); } }

.check-list li { display: flex; gap: 12px; align-items: flex-start; padding: 11px 0; font-size: 15.5px; color: #c3cfe8; border-bottom: 1px dashed rgba(255,255,255,.07); }
.check-list li .ck {
  width: 22px; height: 22px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center;
  background: rgba(52,211,153,.14); color: #34d399; font-size: 12px; margin-top: 3px;
  border: 1px solid rgba(52,211,153,.3);
}

/* 价值观 */
.val-card { padding: 30px 26px; text-align: left; }
.val-card .vi { font-size: 30px; margin-bottom: 16px; }
.val-card h4 { font-size: 18px; margin-bottom: 10px; }
.val-card p { font-size: 14.3px; color: var(--text-sub); line-height: 1.8; }

/* ============================================================
   CONTACT
   ============================================================ */
.ct-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: start; }
@media (max-width:960px){ .ct-grid { grid-template-columns: 1fr; } }
.info-card { display: flex; gap: 16px; padding: 22px 24px; margin-bottom: 16px; }
.info-card .ii {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0; display: grid; place-items: center; font-size: 21px;
  background: var(--grad-card); border: 1px solid var(--line-strong); transition: transform .5s var(--ease);
}
.info-card:hover .ii { transform: scale(1.1) rotate(-8deg); }
.info-card h5 { font-size: 13px; color: var(--text-dim); font-weight: 500; letter-spacing: .08em; margin-bottom: 5px; }
.info-card p, .info-card a { font-size: 15.5px; color: var(--text); font-weight: 600; line-height: 1.6; }
.info-card a:hover { color: #9db4ff; }

.step-row { display: flex; align-items: center; gap: 12px; padding: 13px 0; border-bottom: 1px dashed rgba(255,255,255,.07); }
.step-row .sn {
  width: 28px; height: 28px; border-radius: 9px; flex-shrink: 0; display: grid; place-items: center;
  font-size: 13px; font-weight: 800; background: var(--grad-brand); color:#fff;
}
.step-row span { font-size: 15px; color: #c3cfe8; }

.form-card { padding: 40px; }
@media (max-width:560px){ .form-card { padding: 26px 20px; } }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width:560px){ .f-row { grid-template-columns: 1fr; } }
.fg { margin-bottom: 18px; position: relative; }
.fg label { display: block; font-size: 13.5px; color: var(--text-sub); margin-bottom: 9px; font-weight: 500; }
.fg input, .fg select, .fg textarea {
  width: 100%; padding: 14px 16px; border-radius: 14px;
  background: rgba(255,255,255,.035); border: 1px solid var(--line); color: var(--text);
  font-size: 15px; outline: none; transition: border-color .35s, background .35s, box-shadow .35s;
}
.fg textarea { min-height: 128px; resize: vertical; line-height: 1.8; }
.fg input::placeholder, .fg textarea::placeholder { color: var(--text-dim); }
.fg input:focus, .fg select:focus, .fg textarea:focus {
  border-color: rgba(120,160,255,.7); background: rgba(79,125,255,.07);
  box-shadow: 0 0 0 4px rgba(79,125,255,.13);
}
.fg select { appearance: none; cursor: pointer; background-image: linear-gradient(45deg,transparent 50%,#98a3bd 50%),linear-gradient(135deg,#98a3bd 50%,transparent 50%); background-position: calc(100% - 20px) 22px, calc(100% - 14px) 22px; background-size: 6px 6px; background-repeat: no-repeat; }
.fg select option { background: #0d1220; color: #fff; }
.fg.invalid input, .fg.invalid select, .fg.invalid textarea { border-color: rgba(255,107,157,.75); box-shadow: 0 0 0 4px rgba(255,107,157,.12); }
.fg .err { font-size: 12.5px; color: #ff6b9d; margin-top: 7px; display: none; }
.fg.invalid .err { display: block; }
.form-submit { width: 100%; padding: 17px; font-size: 16px; margin-top: 6px; }
.form-note { font-size: 13px; color: var(--text-dim); text-align: center; margin-top: 16px; }
.form-success {
  position: absolute; inset: 0; z-index: 5; display: grid; place-items: center; text-align: center;
  background: rgba(8,11,20,.94); backdrop-filter: blur(14px); border-radius: var(--r-lg);
  opacity: 0; pointer-events: none; transition: opacity .5s; padding: 30px;
}
.form-success.on { opacity: 1; pointer-events: auto; }
.form-success .tick {
  width: 68px; height: 68px; border-radius: 50%; margin: 0 auto 20px; display: grid; place-items: center;
  background: rgba(52,211,153,.16); border: 1.5px solid rgba(52,211,153,.5); color:#34d399; font-size: 30px;
  animation: pop .6s var(--ease-out);
}
@keyframes pop { from { transform: scale(.4); opacity:0; } to { transform: scale(1); opacity:1; } }

/* ============================================================
   子页面 HERO
   ============================================================ */
.phero { position: relative; padding: calc(var(--nav-h) + 96px) 0 84px; text-align: center; overflow: hidden; }
.phero h1 { font-size: clamp(32px,5.4vw,60px); font-weight: 900; letter-spacing: -.035em; margin-bottom: 18px; }
.phero p { color: var(--text-sub); font-size: clamp(15px,1.8vw,18px); max-width: 620px; margin-inline: auto; line-height: 1.85; }
.crumb { display: flex; gap: 8px; justify-content: center; align-items: center; font-size: 13.5px; color: var(--text-dim); margin-bottom: 22px; }
.crumb a:hover { color: #9db4ff; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { position: relative; z-index: 3; border-top: 1px solid var(--line); padding: 72px 0 30px; margin-top: 40px; background: linear-gradient(180deg, transparent, rgba(6,9,18,.9)); }
.f-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 44px; margin-bottom: 54px; }
@media (max-width:900px){ .f-grid { grid-template-columns: 1fr 1fr; gap: 34px; } }
@media (max-width:560px){ .f-grid { grid-template-columns: 1fr; } }
.f-col h5 { font-size: 14px; letter-spacing: .16em; text-transform: uppercase; color: var(--text); margin-bottom: 20px; font-weight: 700; }
.f-col p { font-size: 14.5px; color: var(--text-dim); line-height: 1.9; }
.f-col ul li { margin-bottom: 11px; }
.f-col ul a { font-size: 14.5px; color: var(--text-dim); transition: color .3s, transform .35s var(--ease); display: inline-block; }
.f-col ul a:hover { color: #9db4ff; transform: translateX(5px); }
.f-brand .logo { margin-bottom: 18px; }
.f-social { display: flex; gap: 10px; margin-top: 22px; }
.f-social a {
  width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font-size: 15px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text-sub);
  transition: all .4s var(--ease);
}
.f-social a:hover { transform: translateY(-5px) rotate(-8deg); color:#fff; border-color: rgba(140,170,255,.5); background: rgba(79,125,255,.16); }
.f-bottom {
  border-top: 1px solid var(--line); padding-top: 26px; display: flex; justify-content: space-between; gap: 18px;
  flex-wrap: wrap; font-size: 13.5px; color: var(--text-dim);
}
.f-bottom a:hover { color: #9db4ff; }

/* 悬浮联系 */
.dock {
  position: fixed; right: 22px; bottom: 26px; z-index: 800; display: grid; gap: 12px;
  opacity: 0; transform: translateY(20px); pointer-events: none; transition: all .5s var(--ease);
}
.dock.show { opacity: 1; transform: none; pointer-events: auto; }
@media (max-width:640px){ .dock { right: 14px; bottom: 16px; } }
.dock a, .dock button {
  width: 50px; height: 50px; border-radius: 15px; border: 1px solid var(--line); cursor: pointer;
  background: rgba(12,17,32,.8); backdrop-filter: blur(16px); color: var(--text);
  display: grid; place-items: center; font-size: 19px;
  transition: all .45s var(--ease); position: relative;
}
.dock a:hover, .dock button:hover { transform: translateY(-5px) scale(1.07); border-color: rgba(140,170,255,.5); color:#fff; box-shadow: var(--shadow-md); }
.dock .tip {
  position: absolute; right: 62px; top: 50%; transform: translateY(-50%) translateX(8px);
  padding: 7px 13px; border-radius: 9px; font-size: 13px; white-space: nowrap;
  background: rgba(12,17,32,.96); border: 1px solid var(--line); color: var(--text);
  opacity: 0; pointer-events: none; transition: all .4s var(--ease);
}
.dock a:hover .tip, .dock button:hover .tip { opacity: 1; transform: translateY(-50%) translateX(0); }

/* 分隔线 */
.hr { height: 1px; background: linear-gradient(90deg, transparent, var(--line-strong), transparent); margin: 0; border: 0; }