/* ============ 基础 ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#070b16;
  --bg-soft:#0a1020;
  --panel:rgba(255,255,255,.038);
  --panel-2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);
  --text:#e9eef9;
  --text-2:#a9b6d0;
  --text-3:#74819c;
  --brand:#3b82f6;
  --brand-2:#22d3ee;
  --brand-3:#7c5cff;
  --grad:linear-gradient(100deg,#5aa9ff 0%,#22d3ee 52%,#8b6bff 100%);
  --radius:18px;
  --radius-sm:12px;
  --maxw:1200px;
  --shadow:0 24px 70px -30px rgba(0,0,0,.9);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --mono:"SF Mono",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;
}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(900px 600px at 78% -8%,rgba(59,130,246,.20),transparent 62%),
    radial-gradient(700px 520px at 8% 8%,rgba(124,92,255,.14),transparent 60%),
    radial-gradient(800px 600px at 50% 108%,rgba(34,211,238,.10),transparent 62%);
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;
  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% 70% at 50% 0%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 20%,transparent 78%);
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,textarea,select{font:inherit}
::selection{background:rgba(59,130,246,.35);color:#fff}
:focus-visible{outline:2px solid var(--brand-2);outline-offset:3px;border-radius:6px}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:110px 0;position:relative;z-index:1}
.section--tight{padding:84px 0}

/* ============ 通用元件 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;
  color:var(--brand-2);
  padding:7px 14px;border-radius:999px;
  background:rgba(34,211,238,.08);
  border:1px solid rgba(34,211,238,.22);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 10px var(--brand-2)}
h1,h2,h3,h4{line-height:1.24;letter-spacing:-.02em;font-weight:700}
.h2{font-size:clamp(28px,3.6vw,44px);margin:20px 0 16px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--text-2);font-size:clamp(15px,1.5vw,17px);max-width:660px}
.sec-head{margin-bottom:56px}
.sec-head--center{text-align:center}
.sec-head--center .lead{margin:0 auto}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 26px;border-radius:999px;font-weight:600;font-size:15px;
  transition:.28s cubic-bezier(.4,0,.2,1);white-space:nowrap;border:1px solid transparent;
}
.btn svg{width:17px;height:17px;flex:none}
.btn--primary{
  background:var(--grad);color:#04101f;
  box-shadow:0 12px 34px -12px rgba(59,130,246,.72);
}
.btn--primary:hover{transform:translateY(-3px);box-shadow:0 20px 44px -14px rgba(59,130,246,.86)}
.btn--ghost{background:var(--panel-2);border-color:var(--line-strong);color:var(--text)}
.btn--ghost:hover{background:rgba(255,255,255,.1);transform:translateY(-3px);border-color:rgba(34,211,238,.5)}
.btn--lg{padding:16px 32px;font-size:16px}

/* ============ 导航 ============ */
.header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:.35s ease;
  border-bottom:1px solid transparent;
}
.header.is-stuck{
  background:rgba(7,11,22,.82);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:14px}
.logo{display:flex;align-items:center;gap:11px;font-weight:700;font-size:18px;letter-spacing:-.01em;flex:none}
.logo__mark{
  width:38px;height:38px;flex:none;
  display:grid;place-items:center;
}
.logo__mark img{width:100%;height:100%;object-fit:contain;filter:drop-shadow(0 2px 6px rgba(90,169,255,.25))}
.logo__txt small{display:block;font-size:10px;letter-spacing:.22em;color:var(--text-3);font-weight:600;text-transform:uppercase;line-height:1}
.nav__menu{display:flex;align-items:center;gap:4px;list-style:none}
.nav__menu a{
  display:block;padding:9px 12px;border-radius:10px;font-size:14px;color:var(--text-2);
  transition:.22s;font-weight:500;white-space:nowrap;
}
.nav__menu a:hover{color:#fff;background:var(--panel-2)}
.nav__menu a.is-active{color:#fff;background:rgba(59,130,246,.16)}
.nav__cta{display:flex;align-items:center;gap:10px;flex:none}
.nav__tel{font-size:14px;color:var(--text-2);display:flex;align-items:center;gap:7px;font-weight:500}
.nav__tel:hover{color:var(--brand-2)}
.nav__tel svg{width:15px;height:15px}
.nav__login{font-size:14px;color:var(--text-2);font-weight:500;padding:8px 15px;border:1px solid var(--line-strong);border-radius:999px;white-space:nowrap;transition:.22s}
.nav__login:hover{color:#fff;border-color:rgba(59,130,246,.55);background:rgba(59,130,246,.14)}
@media (max-width:640px){.nav__login{display:none}}
.burger{display:none;width:42px;height:42px;border-radius:11px;border:1px solid var(--line-strong);background:var(--panel-2);place-items:center;flex:none}
.burger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.3s;position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
.burger span::before{top:-6px}.burger span::after{top:6px}
.burger.is-open span{background:transparent}
.burger.is-open span::before{top:0;transform:rotate(45deg)}
.burger.is-open span::after{top:0;transform:rotate(-45deg)}

.mobile-menu{
  position:fixed;top:72px;left:0;right:0;z-index:99;
  background:rgba(7,11,22,.97);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line);
  padding:12px 24px 26px;
  display:none;flex-direction:column;gap:2px;
  max-height:calc(100vh - 72px);overflow-y:auto;
}
.mobile-menu.is-open{display:flex}
.mobile-menu a{padding:14px 4px;font-size:16px;color:var(--text-2);border-bottom:1px solid rgba(255,255,255,.05)}
.mobile-menu a:last-of-type{border-bottom:none}
.mobile-menu .btn{margin-top:16px}

/* ============ Hero ============ */
.hero{padding:150px 0 100px;position:relative;z-index:1;overflow:hidden}
.hero__grid{display:grid;grid-template-columns:1.06fr .94fr;gap:64px;align-items:center}
.hero h1{font-size:clamp(32px,4.6vw,58px);margin:22px 0 24px;font-weight:800}
.hero .lead{font-size:clamp(15px,1.6vw,17.5px);max-width:560px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin:36px 0 30px}
.hero__trust{display:flex;flex-wrap:wrap;gap:10px 26px;color:var(--text-3);font-size:13.5px}
.hero__trust span{display:flex;align-items:center;gap:7px}
.hero__trust svg{width:15px;height:15px;color:var(--brand-2);flex:none}

/* 代码窗口 */
.visual{position:relative}
.visual__glow{
  position:absolute;inset:-12% -8%;z-index:0;
  background:radial-gradient(closest-side,rgba(59,130,246,.30),transparent 72%);
  filter:blur(26px);
}
.code-card{
  position:relative;z-index:2;border-radius:16px;overflow:hidden;
  background:linear-gradient(165deg,#0d1526,#080d19 62%);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow);
}
.code-card__bar{
  display:flex;align-items:center;gap:8px;padding:12px 16px;
  background:rgba(255,255,255,.035);border-bottom:1px solid var(--line);
}
.dot{width:10px;height:10px;border-radius:50%}
.dot--r{background:#ff5f57}.dot--y{background:#febc2e}.dot--g{background:#28c840}
.code-card__name{margin-left:8px;font-family:var(--mono);font-size:12px;color:var(--text-3)}
.code-card__body{padding:20px 22px 26px;font-family:var(--mono);font-size:13px;line-height:2.05;overflow:hidden}
.cl{display:flex;gap:14px;white-space:pre}
.cl i{color:#3d4a63;font-style:normal;flex:none;width:16px;text-align:right;user-select:none}
.k{color:#c792ea}.s{color:#7ee787}.f{color:#82aaff}.c{color:#546178}.n{color:#f78c6c}.t{color:#22d3ee}
.cursor{display:inline-block;width:8px;height:15px;background:var(--brand-2);vertical-align:-2px;animation:blink 1.05s step-end infinite}
@keyframes blink{50%{opacity:0}}

/* 手机mock */
.phone{
  position:absolute;right:-16px;bottom:-42px;z-index:3;width:172px;
  border-radius:30px;padding:9px;
  background:linear-gradient(160deg,#1a2438,#0b1221);
  border:1px solid var(--line-strong);
  box-shadow:0 32px 60px -22px rgba(0,0,0,.95);
}
.phone__screen{
  border-radius:22px;background:#080e1b;border:1px solid var(--line);
  overflow:hidden;
}
.phone__top{display:flex;align-items:center;justify-content:space-between;padding:12px 13px 10px;background:linear-gradient(120deg,rgba(59,130,246,.34),rgba(34,211,238,.16))}
.phone__top b{font-size:11.5px;font-weight:600;color:#fff}
.phone__top em{font-style:normal;font-size:9px;color:rgba(255,255,255,.75)}
.ph-list{padding:10px 11px 14px;display:flex;flex-direction:column;gap:8px}
.ph-item{display:flex;align-items:center;gap:8px;padding:9px;border-radius:10px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.05)}
.ph-item u{
  width:24px;height:24px;border-radius:7px;flex:none;text-decoration:none;
  background:linear-gradient(140deg,rgba(59,130,246,.6),rgba(34,211,238,.4));
  display:grid;place-items:center;font-size:11px;color:#fff;
}
.ph-item span{display:block;height:6px;border-radius:4px;background:rgba(255,255,255,.16)}
.ph-item span:first-child{width:56px;margin-bottom:5px;background:rgba(255,255,255,.34)}
.ph-item span:last-child{width:34px}
.ph-btn{margin:2px 11px 14px;height:34px;border-radius:10px;background:var(--grad);display:grid;place-items:center;font-size:12px;font-weight:700;color:#04101f}

.float-chip{
  position:absolute;z-index:4;display:flex;align-items:center;gap:9px;
  padding:9px 14px;border-radius:12px;font-size:12.5px;font-weight:600;
  background:rgba(11,18,34,.9);border:1px solid var(--line-strong);
  backdrop-filter:blur(10px);box-shadow:0 16px 34px -16px rgba(0,0,0,.9);
  animation:float 5.5s ease-in-out infinite;
}
.float-chip svg{width:15px;height:15px;color:var(--brand-2)}
.float-chip--a{top:6%;left:-30px}
.float-chip--b{bottom:26%;left:-52px;animation-delay:1.6s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}

/* ============ 数据条 ============ */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.014)}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:42px 26px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat b{display:block;font-size:clamp(30px,3.6vw,44px);font-weight:800;letter-spacing:-.03em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.15}
.stat span{font-size:13.5px;color:var(--text-2);margin-top:6px;display:block}

/* ============ 卡片网格 ============ */
.grid{display:grid;gap:20px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}

.card{
  position:relative;padding:30px 28px 32px;border-radius:var(--radius);
  background:linear-gradient(168deg,rgba(255,255,255,.055),rgba(255,255,255,.018));
  border:1px solid var(--line);
  transition:.3s cubic-bezier(.4,0,.2,1);overflow:hidden;
}
.card::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),rgba(59,130,246,.16),transparent 62%);
  opacity:0;transition:.35s;
}
.card:hover{transform:translateY(-6px);border-color:rgba(34,211,238,.34);box-shadow:0 30px 60px -34px rgba(0,0,0,.95)}
.card:hover::after{opacity:1}
.card__ico{
  width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:20px;
  background:linear-gradient(145deg,rgba(59,130,246,.22),rgba(34,211,238,.10));
  border:1px solid rgba(34,211,238,.26);color:var(--brand-2);
}
.card__ico svg{width:25px;height:25px}
.card h3{font-size:19.5px;margin-bottom:11px}
.card p{color:var(--text-2);font-size:14.5px}
.card__list{list-style:none;margin-top:18px;display:flex;flex-wrap:wrap;gap:8px}
.card__list li{
  font-size:12.5px;color:var(--text-2);padding:4px 11px;border-radius:999px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
}
.card__no{
  position:absolute;top:22px;right:24px;font-family:var(--mono);font-size:12px;
  color:var(--text-3);letter-spacing:.1em;
}

/* ============ 流程 ============ */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;position:relative}
.step{
  position:relative;padding:28px 26px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);transition:.3s;
}
.step:hover{background:var(--panel-2);border-color:rgba(34,211,238,.3);transform:translateY(-4px)}
.step__n{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  font-family:var(--mono);font-weight:700;font-size:14px;margin-bottom:16px;
  background:linear-gradient(145deg,rgba(59,130,246,.3),rgba(124,92,255,.16));
  border:1px solid rgba(59,130,246,.36);color:#cfe4ff;
}
.step h4{font-size:17px;margin-bottom:9px}
.step p{font-size:14px;color:var(--text-2)}

/* ============ 案例 ============ */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px}
.filter{
  padding:9px 20px;border-radius:999px;font-size:14px;font-weight:500;
  border:1px solid var(--line-strong);background:var(--panel);color:var(--text-2);transition:.24s;
}
.filter:hover{color:#fff;border-color:rgba(34,211,238,.4)}
.filter.is-active{background:var(--grad);color:#04101f;border-color:transparent;font-weight:700}

.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  background:linear-gradient(170deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  transition:.34s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;
}
.case:hover{transform:translateY(-7px);border-color:rgba(34,211,238,.36);box-shadow:0 34px 64px -34px rgba(0,0,0,.95)}
.case.is-hidden{display:none}
.case__thumb{
  height:186px;position:relative;display:grid;place-items:center;overflow:hidden;
  background:linear-gradient(140deg,var(--c1),var(--c2));
}
.case__thumb::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.14) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:26px 26px;
}
.case__thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 42%,rgba(7,11,22,.72));
}
.mock{
  position:relative;z-index:2;width:74%;border-radius:12px;overflow:hidden;
  background:rgba(7,11,22,.74);border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(6px);box-shadow:0 20px 40px -18px rgba(0,0,0,.85);
}
.mock__bar{display:flex;gap:5px;padding:8px 10px;border-bottom:1px solid rgba(255,255,255,.1);background:rgba(255,255,255,.07)}
.mock__bar i{width:7px;height:7px;border-radius:50%;background:rgba(255,255,255,.32)}
.mock__row{display:flex;gap:8px;padding:11px 12px}
.mock__side{width:26px;display:flex;flex-direction:column;gap:6px}
.mock__side i{height:6px;border-radius:3px;background:rgba(255,255,255,.22)}
.mock__main{flex:1;display:flex;flex-direction:column;gap:7px}
.mock__main i{height:9px;border-radius:3px;background:rgba(255,255,255,.2)}
.mock__main i:first-child{width:64%;background:rgba(255,255,255,.42)}
.mock__main i:nth-child(3){width:82%}
.mock__bars{display:flex;align-items:flex-end;gap:5px;height:34px;margin-top:2px}
.mock__bars i{flex:1;border-radius:3px 3px 0 0;background:linear-gradient(180deg,rgba(34,211,238,.85),rgba(59,130,246,.35))}

.case__body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.case__cat{font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--brand-2);text-transform:uppercase}
.case h3{font-size:18px;margin:9px 0 10px}
.case p{font-size:14px;color:var(--text-2);flex:1}
.case__tags{list-style:none;display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.case__tags li{font-size:12px;color:var(--text-2);padding:3px 10px;border-radius:6px;background:rgba(255,255,255,.05);border:1px solid var(--line)}

/* ============ 技术栈 ============ */
.stack{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.stack__col{padding:24px 22px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line);transition:.3s}
.stack__col:hover{border-color:rgba(124,92,255,.4);background:var(--panel-2)}
.stack__col h4{font-size:14px;color:var(--brand-2);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.stack__col h4 svg{width:16px;height:16px}
.stack__col ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.stack__col li{font-size:13.5px;color:var(--text-2);padding-left:14px;position:relative}
.stack__col li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:rgba(34,211,238,.65)}

/* ============ 优势 ============ */
.adv{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.adv__item{display:flex;gap:18px;padding:26px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);transition:.3s}
.adv__item:hover{background:var(--panel-2);border-color:rgba(34,211,238,.3)}
.adv__i{
  width:44px;height:44px;border-radius:12px;flex:none;display:grid;place-items:center;
  background:linear-gradient(145deg,rgba(34,211,238,.22),rgba(59,130,246,.12));
  border:1px solid rgba(34,211,238,.28);color:var(--brand-2);
}
.adv__i svg{width:21px;height:21px}
.adv__item h4{font-size:17px;margin-bottom:8px}
.adv__item p{font-size:14px;color:var(--text-2)}

/* ============ FAQ ============ */
.faq{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq__item{border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line);overflow:hidden;transition:.3s}
.faq__item.is-open{border-color:rgba(34,211,238,.34);background:var(--panel-2)}
.faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 24px;text-align:left;font-size:16px;font-weight:600;letter-spacing:-.01em;
}
.faq__ico{width:24px;height:24px;border-radius:8px;flex:none;display:grid;place-items:center;background:rgba(255,255,255,.07);border:1px solid var(--line);transition:.3s}
.faq__ico svg{width:13px;height:13px;color:var(--brand-2);transition:.3s}
.faq__item.is-open .faq__ico{background:var(--grad);border-color:transparent}
.faq__item.is-open .faq__ico svg{color:#04101f;transform:rotate(45deg)}
.faq__a{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.4,0,.2,1)}
.faq__a p{padding:0 24px 22px;color:var(--text-2);font-size:14.5px}

/* ============ 联系 ============ */
.contact{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;align-items:start}
.info{display:flex;flex-direction:column;gap:14px}
.info__item{display:flex;gap:16px;padding:22px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line);transition:.3s}
.info__item:hover{border-color:rgba(34,211,238,.32);background:var(--panel-2)}
.info__i{width:42px;height:42px;border-radius:11px;flex:none;display:grid;place-items:center;background:linear-gradient(145deg,rgba(59,130,246,.24),rgba(34,211,238,.1));border:1px solid rgba(34,211,238,.24);color:var(--brand-2)}
.info__i svg{width:19px;height:19px}
.info__item b{display:block;font-size:12.5px;color:var(--text-3);font-weight:600;margin-bottom:4px;letter-spacing:.04em}
.info__item span{font-size:15.5px;font-weight:600}
.info__item a:hover{color:var(--brand-2)}

.form{
  padding:32px;border-radius:var(--radius);
  background:linear-gradient(168deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line-strong);box-shadow:var(--shadow);
}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px;display:flex;flex-direction:column;gap:8px}
.field label{font-size:13.5px;color:var(--text-2);font-weight:500}
.field label em{color:#ff8080;font-style:normal}
.field input,.field textarea,.field select{
  width:100%;padding:13px 15px;border-radius:11px;
  background:rgba(4,8,17,.62);border:1px solid var(--line-strong);color:var(--text);
  transition:.24s;font-size:14.5px;
}
.field textarea{resize:vertical;min-height:108px}
.field input::placeholder,.field textarea::placeholder{color:#5a6780}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--brand-2);
  box-shadow:0 0 0 4px rgba(34,211,238,.13);background:rgba(4,8,17,.85);
}
.field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2374819c' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;background-size:16px;padding-right:42px}
.field select option{background:#0b1221;color:#e9eef9}
.field .err{font-size:12.5px;color:#ff8080;display:none}
.field.is-invalid input,.field.is-invalid textarea,.field.is-invalid select{border-color:#ff8080}
.field.is-invalid .err{display:block}
.form__foot{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:6px}
.form__note{font-size:12.5px;color:var(--text-3);flex:1;min-width:180px}
.form__ok{
  display:none;margin-top:18px;padding:15px 18px;border-radius:11px;font-size:14px;
  background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.34);color:#a5f0ff;
}
.form__ok.is-show{display:block}

/* ============ CTA 条 ============ */
.cta{
  border-radius:26px;padding:60px 48px;text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(135deg,rgba(59,130,246,.2),rgba(124,92,255,.13) 50%,rgba(34,211,238,.14));
  border:1px solid rgba(34,211,238,.26);
}
.cta::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:38px 38px;
  mask-image:radial-gradient(ellipse 70% 90% at 50% 50%,#000,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 70% 90% at 50% 50%,#000,transparent 78%);
}
.cta > *{position:relative;z-index:1}
.cta h2{font-size:clamp(26px,3.2vw,40px);margin-bottom:14px}
.cta p{color:var(--text-2);max-width:600px;margin:0 auto 32px}
.cta__actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ============ 页脚 ============ */
.footer{border-top:1px solid var(--line);background:rgba(4,7,14,.6);position:relative;z-index:1;margin-top:20px}
.footer__top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px;padding:64px 0 48px}
.footer__brand p{color:var(--text-2);font-size:14px;margin:18px 0 22px;max-width:320px}
.footer h4{font-size:14.5px;margin-bottom:18px;letter-spacing:.02em}
.footer ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.footer ul a,.footer ul li{font-size:14px;color:var(--text-2);transition:.22s}
.footer ul a:hover{color:var(--brand-2);padding-left:3px}
.footer__contact li{display:flex;gap:9px;align-items:flex-start}
.footer__contact svg{width:15px;height:15px;color:var(--brand-2);flex:none;margin-top:5px}
.footer__slogan{font-size:12.5px;color:var(--text-3);letter-spacing:.05em}
.footer__bottom{
  border-top:1px solid var(--line);padding:24px 0;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13.5px;color:var(--text-3);
}
.footer__legal{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.footer__legal a{color:var(--text-2);transition:.22s}
.footer__legal a:hover{color:var(--brand-2)}
.beian{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;
  background:rgba(255,255,255,.045);border:1px solid var(--line);
  font-size:13.5px;color:var(--text-2);transition:.26s;
}
.beian:hover{color:#fff;border-color:rgba(34,211,238,.45);background:rgba(34,211,238,.08)}
.beian svg{width:14px;height:14px;color:var(--brand-2);flex:none}
.beian span{white-space:nowrap}
.footer__sep{width:1px;height:14px;background:var(--line-strong)}

/* 返回顶部 */
.totop{
  position:fixed;right:24px;bottom:28px;z-index:90;
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:rgba(11,18,34,.9);border:1px solid var(--line-strong);color:var(--text-2);
  backdrop-filter:blur(10px);opacity:0;visibility:hidden;transform:translateY(14px);
  transition:.32s;
}
.totop.is-show{opacity:1;visibility:visible;transform:none}
.totop:hover{color:#fff;border-color:rgba(34,211,238,.5);background:rgba(34,211,238,.12)}
.totop svg{width:19px;height:19px}

/* ============ 动画 ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
/* 921–1150px：6 个导航项放不下，先收起顶部电话（联系方式在页脚/联系区块仍可见） */
@media (max-width:1150px){
  .nav__tel{display:none}
}
@media (max-width:1080px){
  .hero__grid{grid-template-columns:1fr;gap:60px}
  .visual{max-width:560px;margin:0 auto}
  .phone{right:0}
  .float-chip--b{left:-16px}
  .stack{grid-template-columns:repeat(3,1fr)}
  .footer__top{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:920px){
  .nav__menu,.nav__tel{display:none}
  .burger{display:grid}
  .grid--3,.cases,.flow{grid-template-columns:repeat(2,1fr)}
  .stats__grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:none}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .contact{grid-template-columns:1fr}
  .adv{grid-template-columns:1fr}
}
@media (max-width:640px){
  .section{padding:74px 0}
  .section--tight{padding:60px 0}
  .wrap{padding:0 18px}
  .hero{padding:118px 0 74px}
  .grid--3,.grid--2,.cases,.flow,.stack{grid-template-columns:1fr}
  .form{padding:24px 20px}
  .form__row{grid-template-columns:1fr}
  .cta{padding:44px 24px}
  .phone{position:relative;right:auto;bottom:auto;margin:22px auto 0;width:180px}
  .float-chip--a,.float-chip--b{display:none}
  .code-card__body{font-size:11.5px;padding:16px}
  .footer__top{grid-template-columns:1fr;gap:32px;padding:48px 0 36px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
  .totop{right:16px;bottom:18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ==================================================================
   以下为 SEO 落地页（内容页）专用样式
   ================================================================== */

/* ---------- 面包屑 ---------- */
.crumbs{padding:104px 0 0;position:relative;z-index:1;font-size:13.5px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:9px;color:var(--text-3)}
.crumbs li{display:flex;align-items:center;gap:9px}
.crumbs li+li::before{content:"/";opacity:.55}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--brand-2)}
.crumbs li[aria-current]{color:var(--text-2)}

/* ---------- 落地页页头 ---------- */
.lp-hero{padding:26px 0 58px;position:relative;z-index:1;border-bottom:1px solid var(--line)}
.lp-hero h1{font-size:clamp(26px,3.3vw,40px);font-weight:800;margin:16px 0 18px;line-height:1.3}
.lp-hero .lead{max-width:820px;font-size:clamp(15px,1.5vw,17px)}
.lp-meta{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:24px;color:var(--text-3);font-size:13.5px}
.lp-meta span{display:flex;align-items:center;gap:7px}
.lp-meta svg{width:15px;height:15px;color:var(--brand-2);flex:none}
.lp-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}

/* ---------- 两栏主体 ---------- */
.lp-body{display:grid;grid-template-columns:minmax(0,1fr) 312px;gap:56px;align-items:start;padding:60px 0 92px;position:relative;z-index:1}

/* ---------- 正文排版 ---------- */
.prose{font-size:16px;line-height:1.92;color:var(--text-2)}
.prose h2{font-size:clamp(20px,2.1vw,26px);color:var(--text);font-weight:700;line-height:1.38;margin:54px 0 0}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:17.5px;color:var(--text);font-weight:700;margin:32px 0 0}
.prose p{margin-top:16px}
.prose h2+p,.prose h3+p{margin-top:14px}
.prose strong{color:var(--text);font-weight:600}
.prose a{color:var(--brand-2);border-bottom:1px solid rgba(34,211,238,.3);transition:.2s}
.prose a:hover{border-bottom-color:var(--brand-2);color:#7fe3f5}
.prose ul,.prose ol{margin-top:16px;display:grid;gap:11px}
.prose ul>li{position:relative;padding-left:23px}
.prose ul>li::before{content:"";position:absolute;left:3px;top:12px;width:6px;height:6px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 8px rgba(34,211,238,.6)}
.prose ol{counter-reset:lpstep;list-style:none}
.prose ol>li{counter-increment:lpstep;position:relative;padding-left:33px}
.prose ol>li::before{content:counter(lpstep);position:absolute;left:0;top:4px;width:21px;height:21px;border-radius:50%;background:rgba(90,169,255,.14);border:1px solid rgba(90,169,255,.32);color:var(--brand);font-size:12.5px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:1;font-family:var(--mono)}

/* ---------- 提示块 ---------- */
.note{margin-top:26px;padding:22px 26px;border-radius:var(--radius-sm);background:rgba(90,169,255,.07);border:1px solid rgba(90,169,255,.22);color:var(--text-2);font-size:15px;line-height:1.85}
.note b{color:var(--text);display:block;margin-bottom:7px;font-size:15.5px}

/* ---------- 数据表格 ---------- */
.tbl-wrap{margin-top:24px;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--radius-sm)}
.tbl{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
.tbl th,.tbl td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.7}
.tbl th{background:rgba(255,255,255,.035);color:var(--text);font-weight:600;white-space:nowrap}
.tbl td{color:var(--text-2)}
.tbl tr:last-child td{border-bottom:none}

/* ---------- 侧栏 ---------- */
.side{position:sticky;top:96px;display:grid;gap:18px}
.side__box{padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}
.side__box h4{font-size:15.5px;color:var(--text);margin-bottom:14px;font-weight:700}
.side__box ul{list-style:none;display:grid;gap:11px}
.side__box li a{color:var(--text-2);font-size:14.5px;display:flex;gap:9px;align-items:flex-start;transition:.2s;line-height:1.6}
.side__box li a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand);flex:none;margin-top:9px;opacity:.7}
.side__box li a:hover{color:var(--brand-2)}
.side__cta{background:linear-gradient(150deg,rgba(59,130,246,.16),rgba(34,211,238,.09));border-color:rgba(34,211,238,.24)}
.side__cta p{color:var(--text-2);font-size:14px;margin-bottom:16px;line-height:1.78}
.side__cta .btn{width:100%}
.side__tel{display:block;text-align:center;margin-top:14px;font-size:18px;font-weight:700;color:var(--brand-2)}

/* ---------- 相关阅读 ---------- */
.relate{margin-top:64px;padding-top:44px;border-top:1px solid var(--line)}
.relate h3{font-size:19px;color:var(--text);margin-bottom:24px}
.relate__list{display:grid;grid-template-columns:repeat(auto-fit,minmax(226px,1fr));gap:16px}
.relate__list a{display:block;padding:20px 22px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);transition:.26s}
.relate__list a:hover{border-color:rgba(34,211,238,.4);background:var(--panel-2);transform:translateY(-3px)}
.relate__list b{display:block;color:var(--text);font-size:15px;margin-bottom:7px;font-weight:600}
.relate__list span{color:var(--text-3);font-size:13.5px;line-height:1.68}

/* ---------- 落地页响应式 ---------- */
@media (max-width:1080px){
  .lp-body{grid-template-columns:1fr;gap:48px}
  .side{position:static}
}
@media (max-width:920px){
  .lp-hero{padding:18px 0 46px}
  .prose h2{margin-top:44px}
}
@media (max-width:640px){
  .crumbs{padding-top:86px}
  .lp-body{padding:44px 0 72px;gap:40px}
  .lp-hero h1{font-size:25px}
  .note{padding:18px 20px}
  .relate__list{grid-template-columns:1fr}
}