/* ===== 基础变量与重置 ===== */
:root{
  --blue:#3383FF; --blue-deep:#1A6DFF; --blue-dark:#0B4FD8;
  --purple:#667EEA; --purple-deep:#764BA2;
  --teal:#14B8A6; --amber:#F59E0B;
  --bg:#FFFFFF; --bg-alt:#F5F8FF; --bg-blue:#EEF4FF;
  --text:#1F2937; --text-sub:#6B7280; --border:#E5EDFF;
  --shadow:0 10px 40px rgba(51,131,255,.10);
  --radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Inter","PingFang SC","Microsoft YaHei",-apple-system,sans-serif;color:var(--text);background:var(--bg);line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:88px 0}
.sec-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;border-radius:999px;background:var(--bg-blue);color:var(--blue);font-size:13px;font-weight:600;letter-spacing:1px;text-transform:uppercase}
.sec-title{font-size:34px;font-weight:800;margin:16px 0 8px;letter-spacing:-.5px}
.sec-title .grad{background:linear-gradient(135deg,var(--blue),var(--purple));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.sec-sub{color:var(--text-sub);font-size:16px;max-width:680px}
.sec-head{text-align:center;margin-bottom:52px}
.sec-head .sec-sub{margin:0 auto}
.sec-head-left{text-align:left;margin-bottom:48px}
.sec-head-left .sec-sub{margin-left:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 32px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:all .3s ease;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-deep));color:#fff;box-shadow:0 8px 24px rgba(51,131,255,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(51,131,255,.45)}
.btn-ghost{background:#fff;color:var(--blue);border:1.5px solid var(--border)}
.btn-ghost:hover{border-color:var(--blue);background:var(--bg-blue)}
.btn-sm{padding:10px 22px;font-size:14px}
.nav-menu .btn-primary{color:#fff}
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.page-hero{padding:160px 0 80px;background:linear-gradient(180deg,#EAF2FF 0%,#F5F8FF 60%,#FFFFFF 100%);position:relative;overflow:hidden;text-align:center}
.page-hero h1{font-size:42px;font-weight:900;margin-bottom:16px;letter-spacing:-.8px}
.page-hero p{color:var(--text-sub);font-size:17px;max-width:700px;margin:0 auto}
.page-hero .glow{position:absolute;width:500px;height:500px;border-radius:50%;filter:blur(110px);opacity:.45;pointer-events:none}
.page-hero .glow-a{top:-180px;left:-120px;background:radial-gradient(circle,var(--blue)55,transparent 70%)}
.page-hero .glow-b{bottom:-200px;right:-100px;background:radial-gradient(circle,var(--purple)55,transparent 70%)}
.page-hero .container{position:relative;z-index:3}
.page-hero .glow{z-index:1}
/* 头部文字渐变过渡色 + 光晕阴影（颜色由页面内联 --gh1/--gp/--gh1s/--gps 变量注入，每页不同；渐变文字须用 filter:drop-shadow，text-shadow 会被透明文字盖住） */
.page-hero-grad h1{background:var(--gh1,linear-gradient(120deg,#1557E8 0%,#3383FF 45%,#8B5CF6 100%));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;filter:var(--gh1s,drop-shadow(0 3px 10px rgba(51,131,255,.45)) drop-shadow(0 8px 26px rgba(139,92,246,.30)))}
.page-hero-grad p{background:var(--gp,linear-gradient(120deg,#334155 0%,#1557E8 60%,#3383FF 100%));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;filter:var(--gps,drop-shadow(0 2px 6px rgba(51,131,255,.30)))}
.breadcrumb{font-size:13px;color:var(--text-sub);margin-bottom:18px}
.breadcrumb a{color:var(--blue)}
.breadcrumb span{margin:0 8px;color:#CBD5E1}

/* ===== 导航 ===== */
header{position:fixed;top:0;left:0;right:0;z-index:100;transition:all .3s ease}
header.scrolled{background:rgba(255,255,255,.9);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 4px 24px rgba(31,41,55,.06)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.3px}
.logo img{height:42px;width:auto;object-fit:contain}
.nav-menu{display:flex;align-items:center;gap:32px;list-style:none}
.nav-menu a{font-size:15px;color:var(--text);position:relative;transition:color .2s}
.nav-menu a:hover,.nav-menu a.active{color:var(--blue)}
.nav-menu a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:linear-gradient(90deg,var(--blue),var(--purple));transition:width .3s;border-radius:2px}
.nav-menu a:hover::after,.nav-menu a.active::after{width:100%}
.nav-phone a{display:flex;align-items:center;gap:6px;font-weight:700;color:var(--blue);white-space:nowrap}
.nav-phone a .ic{flex:none}
.nav-phone a:hover{color:var(--purple)}
.nav-phone a::after{display:none}
.has-submenu{position:relative}
.submenu{position:absolute;top:140%;left:50%;transform:translateX(-50%) translateY(10px);background:#fff;border:1px solid var(--border);border-radius:14px;padding:10px;box-shadow:0 16px 40px rgba(31,41,55,.1);min-width:180px;opacity:0;visibility:hidden;transition:all .3s ease}
.has-submenu:hover .submenu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.submenu a{display:block;padding:10px 14px;border-radius:10px;font-size:14px;transition:background .25s}
.submenu a:hover{background:var(--bg-blue);color:var(--blue)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px;z-index:101}
.hamburger span{width:24px;height:2.5px;background:var(--text);border-radius:2px;transition:all .3s}
.hamburger.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{position:relative;padding:170px 0 110px;background:linear-gradient(180deg,#EAF2FF 0%,#F5F8FF 60%,#FFFFFF 100%);overflow:hidden}
#fxCanvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.hero-glow{position:absolute;width:560px;height:560px;border-radius:50%;filter:blur(100px);opacity:.5;pointer-events:none}
.glow-a{top:-160px;right:-80px;background:radial-gradient(circle,#3383FF66,transparent 70%)}
.glow-b{bottom:-180px;left:-100px;background:radial-gradient(circle,#667EEA55,transparent 70%)}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:999px;background:#fff;border:1px solid var(--border);color:var(--blue);font-size:13px;font-weight:600;box-shadow:0 4px 16px rgba(51,131,255,.12)}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(20,184,166,.2);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px rgba(20,184,166,.25)}50%{box-shadow:0 0 0 7px rgba(20,184,166,.08)}}
.hero h1{font-size:50px;font-weight:900;line-height:1.25;margin:22px 0 20px;letter-spacing:-1px;background:linear-gradient(120deg,#0EA5E9 0%,#2563EB 45%,#7C3AED 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;filter:drop-shadow(0 3px 10px rgba(37,99,235,.35)) drop-shadow(0 10px 28px rgba(124,58,237,.22))}
.hero h1 .grad{background:linear-gradient(135deg,var(--blue) 0%,var(--purple) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{color:var(--text-sub);font-size:17px;max-width:520px;margin-bottom:36px;background:linear-gradient(120deg,#475569 0%,#2563EB 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;filter:drop-shadow(0 1px 6px rgba(37,99,235,.25))}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-trust{display:flex;gap:32px;margin-top:44px;flex-wrap:wrap}
.trust-mini{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-sub)}
.trust-mini i{width:34px;height:34px;border-radius:9px;background:#fff;border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-style:normal;font-size:16px}
.ai-visual{position:relative;background:#fff;border-radius:24px;border:1px solid var(--border);box-shadow:var(--shadow);padding:28px}
.av-head{display:flex;align-items:center;gap:12px;padding-bottom:20px;border-bottom:1px solid #F0F4FF}
.av-avatar{width:46px;height:46px;border-radius:13px;background:linear-gradient(135deg,var(--blue),var(--purple));display:flex;align-items:center;justify-content:center;color:#fff;font-size:22px}
.av-name{font-weight:700;font-size:15px}
.av-status{font-size:12px;color:var(--teal);font-weight:600}
.av-body{padding:22px 0 6px;display:flex;flex-direction:column;gap:14px}
.chat-bubble{max-width:86%;padding:13px 16px;border-radius:16px;font-size:14px;line-height:1.6;animation:bubbleIn .6s ease backwards}
.chat-bubble.user{align-self:flex-start;background:#F0F6FF;border-top-left-radius:4px;color:var(--text)}
.chat-bubble.ai{align-self:flex-end;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;border-top-right-radius:4px;box-shadow:0 8px 20px rgba(51,131,255,.25)}
.chat-bubble.ai b{font-weight:700}
.av-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:6px}
.av-mini{border:1px solid #F0F4FF;background:var(--bg-alt);border-radius:12px;padding:13px;font-size:13px}
.av-mini b{display:block;font-size:15px;margin-bottom:2px;color:var(--blue)}
.av-mini span{color:var(--text-sub);font-size:12px}
@keyframes bubbleIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.float-slow{animation:floatY 5s ease-in-out infinite}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* ===== 统计条 ===== */
.stats{background:var(--bg-alt);padding:56px 0;border-top:1px solid #F0F4FF;border-bottom:1px solid #F0F4FF}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat-item .num{font-size:46px;font-weight:900;background:linear-gradient(135deg,var(--blue),var(--purple));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-family:"Inter","Space Grotesk",sans-serif}
.stat-item .unit{font-size:22px;font-weight:700;color:var(--blue);margin-left:2px}
.stat-item .label{color:var(--text-sub);font-size:14px;margin-top:6px}

/* ===== 客户墙 ===== */
.logos{padding:56px 0}
.logos .sec-sub{margin:0 auto;text-align:center;font-size:14px;color:var(--text-sub);margin-bottom:36px;max-width:720px}
.logo-row{display:flex;justify-content:center;align-items:center;gap:48px;flex-wrap:wrap}
.logo-item{height:116px;width:auto;object-fit:contain;filter:none;opacity:1;transition:all .35s}
.logo-item:hover{transform:scale(1.08)}

/* ===== 核心业务 ===== */
.services{background:#fff}
.svc-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.svc-card{border-radius:var(--radius);padding:34px 26px;color:#fff;position:relative;overflow:hidden;min-height:316px;display:flex;flex-direction:column;transition:transform .35s ease,box-shadow .35s ease;cursor:pointer}
.svc-card:hover{transform:translateY(-8px);box-shadow:0 20px 44px rgba(31,41,55,.18)}
.svc-card .ico{width:60px;height:60px;border-radius:16px;background:rgba(255,255,255,.2);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;margin-bottom:22px}
.svc-card .ico svg{width:32px;height:32px}
.svc-card h3{font-size:20px;font-weight:700;margin-bottom:12px}
.svc-card p{font-size:14px;opacity:.92;line-height:1.8;flex:1}
.svc-card .tag{display:inline-block;margin-top:16px;font-size:12.5px;font-weight:600;background:rgba(255,255,255,.22);padding:6px 14px;border-radius:999px;align-self:flex-start}
.svc-card::after{content:"";position:absolute;top:-40%;right:-30%;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.35),transparent 70%);opacity:0;transition:opacity .4s}
.svc-card:hover::after{opacity:1}
.svc-1{background:linear-gradient(135deg,#3383FF,#1A6DFF)}
.svc-2{background:linear-gradient(135deg,#667EEA,#764BA2)}
.svc-3{background:linear-gradient(135deg,#14B8A6,#0D9488)}
.svc-4{background:linear-gradient(135deg,#7C9EB2,#5A7E94)}
.svc-5{background:linear-gradient(135deg,#F59E0B,#D97706)}

/* ===== AI 服务矩阵 ===== */
.ai-section{background:linear-gradient(180deg,#F5F8FF 0%,#F0F4FF 100%);position:relative;overflow:hidden}
.ai-section .sec-title .grad{background:linear-gradient(135deg,#667EEA,#764BA2);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.ai-glow{position:absolute;width:420px;height:420px;border-radius:50%;filter:blur(90px);opacity:.35;pointer-events:none}
.ai-glow-a{top:-100px;left:10%;background:radial-gradient(circle,#667EEA55,transparent 70%)}
.ai-glow-b{bottom:-120px;right:8%;background:radial-gradient(circle,#3383FF44,transparent 70%)}
.ai-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ai-card{background:#fff;border-radius:var(--radius);border:1px solid var(--border);padding:30px 26px;position:relative;overflow:hidden;transition:transform .35s ease,box-shadow .35s ease,border-color .35s}
.ai-card:hover{transform:translateY(-8px);box-shadow:0 20px 44px rgba(102,126,234,.16);border-color:#C7D2FE}
.ai-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--blue),var(--purple))}
.ai-badge{position:absolute;top:22px;right:22px;font-size:11px;font-weight:700;letter-spacing:1px;color:var(--purple);background:rgba(102,126,234,.1);padding:4px 10px;border-radius:999px}
.ai-ico{width:54px;height:54px;border-radius:15px;display:flex;align-items:center;justify-content:center;font-size:25px;color:#fff;margin-bottom:18px;box-shadow:0 8px 20px rgba(102,126,234,.25)}
.ai-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.ai-card p{font-size:14px;color:var(--text-sub);line-height:1.75;margin-bottom:16px}
.ai-meta{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-sub);font-weight:600}
.ai-meta .line{width:16px;height:2px;background:linear-gradient(90deg,var(--blue),var(--purple));border-radius:2px}

/* ===== 技术栈 ===== */
.stack{background:#fff}
.stack-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stack-card{border-radius:var(--radius);border:1px solid var(--border);padding:44px 32px;background:var(--bg-alt);transition:all .3s;min-height:360px;display:flex;flex-direction:column}
.stack-card:hover{border-color:var(--blue);transform:translateY(-4px);box-shadow:0 12px 32px rgba(51,131,255,.12)}
.stack-card h3{font-size:19px;font-weight:700;margin-bottom:24px;display:flex;align-items:center;gap:10px}
.stack-card h3 i{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-style:normal}
.stack-tags{display:flex;flex-wrap:wrap;gap:10px}
.stack-tags span{font-size:14.5px;background:#fff;border:1px solid var(--border);border-radius:9px;padding:8px 14px;color:var(--text-sub);transition:all .25s}
.stack-tags span:hover{background:var(--bg-blue);color:var(--blue);border-color:#BFD4FF}

/* ===== 案例 ===== */
.cases{background:linear-gradient(180deg,#FFFFFF 0%,#F5F8FF 100%)}
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.case-card{background:#fff;border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;transition:transform .35s ease,box-shadow .35s ease;display:flex;flex-direction:column}
.case-card:hover{transform:translateY(-8px);box-shadow:0 20px 44px rgba(51,131,235,.14)}
.case-banner{height:150px;position:relative;display:flex;align-items:flex-end;padding:0;overflow:hidden}
.case-banner img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.case-card:hover .case-banner img{transform:scale(1.05)}
.case-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(31,41,55,.75) 100%)}
.case-banner .ind{position:absolute;bottom:14px;left:16px;z-index:2;font-size:12px;font-weight:600;color:#fff;background:rgba(255,255,255,.25);backdrop-filter:blur(4px);padding:4px 12px;border-radius:999px}
.case-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.case-body h3{font-size:17px;font-weight:700;margin-bottom:8px}
.case-body .desc{font-size:13.5px;color:var(--text-sub);line-height:1.7;margin-bottom:14px;flex:1}
.case-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.case-tags span{font-size:11.5px;padding:3px 10px;border-radius:999px;font-weight:600}
.ct-ai{background:rgba(102,126,234,.1);color:var(--purple)}
.ct-sys{background:rgba(51,131,255,.1);color:var(--blue)}
.case-stats{display:flex;gap:20px;border-top:1px solid #F0F4FF;padding-top:14px}
.cs b{font-size:18px;font-weight:800;color:var(--blue)}
.cs span{font-size:12px;color:var(--text-sub);display:block}
.case-more{display:inline-block;margin-top:14px;font-size:13px;font-weight:700;color:var(--blue);transition:all .25s ease}
.case-more:hover{color:var(--blue-deep,#1A6DFF);transform:translateX(3px)}

/* ===== 流程 ===== */
.flow{background:#fff}
.flow-steps{display:grid;grid-template-columns:repeat(7,1fr);gap:14px;position:relative}
.flow-step{text-align:center;position:relative;padding:0 4px}
.flow-step::after{content:"";position:absolute;top:26px;left:calc(50% + 34px);width:calc(100% - 68px);height:2px;background:linear-gradient(90deg,#DCE7FF,#BFD4FF)}
.flow-step:last-child::after{display:none}
.fs-num{width:52px;height:52px;margin:0 auto 14px;border-radius:16px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;font-size:19px;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(51,131,255,.28);position:relative;z-index:2}
.flow-step h4{font-size:14px;font-weight:700;margin-bottom:6px}
.flow-step p{font-size:12px;color:var(--text-sub);line-height:1.6}

/* ===== 转化区 ===== */
.contact{background:linear-gradient(135deg,#EEF4FF 0%,#F5F0FF 100%);position:relative;overflow:hidden}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.contact-left h2{font-size:34px;font-weight:800;margin:14px 0 14px;letter-spacing:-.5px}
.contact-left p{color:var(--text-sub);font-size:15.5px;margin-bottom:34px}
.c-method{display:flex;align-items:center;gap:16px;padding:16px 0;border-bottom:1px solid #E0E9FF}
.c-method .m-ico{width:48px;height:48px;border-radius:13px;background:#fff;box-shadow:0 6px 16px rgba(51,131,255,.12);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.c-method b{display:block;font-size:15px}
.c-method a{color:var(--blue);font-weight:600;font-size:14px}
.c-method span{font-size:13.5px;color:var(--text-sub)}
.contact-form{background:#fff;border-radius:24px;padding:36px;box-shadow:var(--shadow);border:1px solid var(--border)}
.contact-split{display:flex;gap:36px;align-items:flex-start;flex-wrap:wrap;margin-top:8px}
.contact-methods{flex:1;min-width:240px}
.contact-illustration{flex:1;min-width:240px;align-self:stretch}
.contact-illustration img{width:100%;height:100%;min-height:280px;object-fit:cover;border-radius:16px;box-shadow:var(--shadow);display:block}
.contact-illustration .ci-cap{font-size:13.5px;color:var(--text-sub);margin-top:14px;line-height:1.7}
.cf-title{font-size:20px;font-weight:800;margin-bottom:6px}
.cf-sub{font-size:13px;color:var(--text-sub);margin-bottom:24px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.form-group label{display:block;font-size:13px;font-weight:600;margin-bottom:7px;color:#374151}
.form-group input,.form-group textarea{width:100%;padding:12px 15px;border:1.5px solid var(--border);border-radius:10px;font-size:14px;font-family:inherit;transition:border-color .25s;background:#FAFCFF;color:var(--text)}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(51,131,255,.1)}
.form-group textarea{resize:vertical;min-height:96px}
.form-btn{width:100%;padding:14px;font-size:15px;margin-top:8px}
.form-note{text-align:center;font-size:12px;color:var(--text-sub);margin-top:12px}

/* ===== 页脚 ===== */
footer{background:#0F1B33;color:#A9B8D4;padding:56px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;margin-bottom:40px}
.foot-brand .logo{color:#fff;margin-bottom:16px;display:inline-flex}
.foot-brand .logo img{height:42px;width:auto;background:#fff;border-radius:10px;padding:8px 14px;box-shadow:0 4px 16px rgba(0,0,0,.35)}
.foot-brand p{font-size:14px;line-height:1.8;color:#8496B8;max-width:340px}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:18px}
.foot-col ul{list-style:none}
.foot-col li{margin-bottom:11px;font-size:14px}
.foot-col a:hover{color:#fff}
.foot-bottom{border-top:1px solid #1E2C4D;padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:13px;color:#6478A0;flex-wrap:wrap;gap:10px}
.foot-bottom a{margin-left:16px}

/* ===== 悬浮咨询 ===== */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:90;display:flex;flex-direction:column;gap:12px}
.float-btn{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff;box-shadow:0 10px 28px rgba(51,131,255,.4);transition:transform .3s;cursor:pointer;border:none}
.float-btn:hover{transform:scale(1.1)}
.fb-tel{background:linear-gradient(135deg,var(--blue),var(--blue-deep))}
.fb-wx{background:linear-gradient(135deg,#14B8A6,#0D9488)}

/* ===== 悬浮弹窗（电话 / 微信二维码） ===== */
.float-modal{position:fixed;inset:0;background:rgba(15,23,42,.55);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:200;padding:20px;opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
.float-modal.show{opacity:1;visibility:visible}
.modal-box{background:#fff;border-radius:20px;padding:34px 30px;text-align:center;max-width:300px;width:100%;box-shadow:0 24px 60px rgba(15,23,42,.28);transform:translateY(16px) scale(.96);transition:transform .3s;position:relative;display:none}
.float-modal.show .modal-box{transform:none}
.modal-box.modal-tel{display:block}
.modal-box .modal-close{position:absolute;top:12px;right:12px;width:30px;height:30px;border:none;background:#f1f5f9;border-radius:50%;font-size:14px;cursor:pointer;color:#64748b;line-height:1;transition:background .2s}
.modal-box .modal-close:hover{background:#e2e8f0;color:#334155}
.modal-box .modal-ico{width:56px;height:56px;border-radius:50%;margin:0 auto 14px;display:flex;align-items:center;justify-content:center}
.modal-tel .modal-ico{background:rgba(51,131,255,.12);color:var(--blue)}
.modal-wx .modal-ico{background:rgba(20,184,166,.12);color:#0D9488}
.modal-box h3{font-size:18px;font-weight:800;margin:0 0 6px}
.modal-phone{display:block;font-size:26px;font-weight:800;color:var(--blue);letter-spacing:1px;margin:4px 0 18px;text-decoration:none}
.modal-box img{width:176px;height:176px;border-radius:12px;margin:10px auto 14px;display:block;object-fit:cover}
.modal-box p{font-size:13px;color:var(--text-sub);margin:0}
.modal-box .btn{margin-top:2px}


/* ===== SVG 图标（Lucide 风格，替换原 emoji） ===== */
.ic{display:inline-block;vertical-align:middle;flex-shrink:0}
.trust-mini i svg{width:18px;height:18px;color:var(--blue)}
.av-avatar svg{width:24px;height:24px}
.ai-ico svg{width:28px;height:28px}
.ai-detail-card .icon svg{width:36px;height:36px}
.stack-card h3 i svg{width:16px;height:16px}
.c-method .m-ico svg{width:22px;height:22px;color:var(--blue)}
.value-card .ico svg{width:38px;height:38px;color:var(--blue)}
.float-btn svg{width:24px;height:24px}
.service-hero .visual svg{width:64px;height:64px;color:var(--blue)}

/* ===== 业务页通用内容 ===== */
.service-page{background:#fff;padding-top:40px}
.service-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;margin-bottom:64px}
.service-hero h2.service-hero-title{font-size:38px;font-weight:900;line-height:1.25;margin-bottom:18px}
.service-hero h2.service-hero-title .grad{background:linear-gradient(135deg,var(--blue),var(--purple));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.service-hero p{color:var(--text-sub);font-size:16px;margin-bottom:28px}
.service-hero .visual{min-height:280px;border-radius:24px;background:linear-gradient(135deg,#EAF2FF,#F5F0FF);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;padding:40px;text-align:center}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:64px}
.feature-card{background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:all .3s}
.feature-card:hover{border-color:var(--blue);transform:translateY(-5px)}
.feature-card .num{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:16px}
.feature-card h3{font-size:17px;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-sub);line-height:1.7}
.tech-tags{background:#fff;padding:28px;border-radius:var(--radius);border:1px solid var(--border);margin-bottom:64px}
.tech-tags h3{margin-bottom:18px;font-size:18px}
.tech-tags .tags{display:flex;flex-wrap:wrap;gap:10px}
.tech-tags .tags span{background:var(--bg-blue);color:var(--blue);font-size:13px;font-weight:600;padding:7px 14px;border-radius:999px}

/* ===== AI 页 ===== */
.ai-hero-visual{background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;border-radius:24px;padding:34px;box-shadow:0 16px 40px rgba(51,131,255,.35)}
.ai-hero-visual h3{font-size:22px;margin-bottom:16px}
.ai-hero-visual ul{list-style:none;font-size:14px;line-height:2.2}
.ai-detail-card{display:grid;grid-template-columns:80px 1fr;gap:24px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:32px;margin-bottom:20px;transition:all .3s}
.ai-detail-card:hover{border-color:var(--purple);box-shadow:0 12px 32px rgba(102,126,234,.12)}
.ai-detail-card .icon{width:80px;height:80px;border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:34px;color:#fff;box-shadow:0 10px 24px rgba(102,126,234,.25)}
.ai-detail-card h3{font-size:20px;margin-bottom:10px}
.ai-detail-card p{font-size:14px;color:var(--text-sub);margin-bottom:12px;line-height:1.75}
.ai-detail-card ul{font-size:13.5px;color:var(--text-sub);padding-left:18px;line-height:1.9}
.ai-detail-card .meta{display:inline-block;margin-top:12px;font-size:12px;font-weight:700;color:var(--purple);background:rgba(102,126,234,.1);padding:5px 12px;border-radius:999px}

/* ===== 案例列表 ===== */
.case-filter{display:flex;justify-content:center;gap:10px;margin-bottom:36px;flex-wrap:wrap}
.case-filter button{padding:8px 18px;border-radius:999px;border:1px solid var(--border);background:#fff;font-size:14px;cursor:pointer;transition:all .25s}
.case-filter button.active,.case-filter button:hover{background:var(--blue);color:#fff;border-color:var(--blue)}
.case-list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-list-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:0;overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.case-list-card:hover{border-color:var(--blue);transform:translateY(-5px);box-shadow:0 12px 32px rgba(51,131,255,.12)}
.case-list-card .case-banner{height:170px;flex-shrink:0}
.case-list-card:hover .case-banner img{transform:scale(1.05)}
.case-list-card .case-card-body{padding:20px 22px 22px;flex:1;display:flex;flex-direction:column}
.case-list-card .plat{font-size:12px;color:var(--text-sub);margin-bottom:10px}
.case-list-card h3{font-size:17px;margin-bottom:10px}
.case-list-card p{font-size:13.5px;color:var(--text-sub);line-height:1.7;margin-bottom:14px;flex:1}
.case-list-card .tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.case-list-card .tags span{font-size:11px;background:var(--bg-blue);color:var(--blue);padding:3px 10px;border-radius:999px}
.case-list-card .link{font-size:13px;font-weight:700;color:var(--blue)}

/* ===== 案例详情 ===== */
.case-detail-hero{border-radius:24px;overflow:hidden;margin-bottom:40px;box-shadow:var(--shadow)}
.case-detail-hero img{width:100%;height:320px;object-fit:cover}
.case-detail-body{display:grid;grid-template-columns:2fr 1fr;gap:40px}
.case-detail-body h2{font-size:28px;margin-bottom:16px}
.case-detail-body p{font-size:15px;color:var(--text-sub);line-height:1.9;margin-bottom:18px}
.case-detail-body ul{padding-left:20px;color:var(--text-sub);line-height:2}
.case-side{background:var(--bg-alt);border-radius:var(--radius);padding:28px;border:1px solid var(--border)}
.case-side h4{margin-bottom:18px;font-size:16px}
.case-side .row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid #E0E9FF;font-size:14px}
.case-side .row:last-child{border-bottom:none}
.case-side .row span{color:var(--text-sub)}

/* ===== 关于我们 ===== */
.about-intro{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:stretch;margin-bottom:64px}
.about-intro .visual{position:relative;border-radius:24px;overflow:hidden;min-height:360px;background:#f0f4f8}
.about-intro .visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.about-intro h2{font-size:34px;line-height:1.3;margin-bottom:18px}
.about-intro p{color:var(--text-sub);line-height:1.9;margin-bottom:16px}
.about-values{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:64px}
.value-card{text-align:center;padding:32px 24px;background:var(--bg-alt);border-radius:var(--radius);border:1px solid var(--border)}
.value-card .ico{font-size:36px;margin-bottom:16px}
.value-card h3{font-size:18px;margin-bottom:10px}
.value-card p{font-size:13.5px;color:var(--text-sub)}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .hero h1{font-size:40px}
  .ai-grid{grid-template-columns:repeat(2,1fr)}
  .stack-grid{grid-template-columns:repeat(2,1fr)}
  .svc-grid{grid-template-columns:repeat(3,1fr)}
  .case-grid,.case-list-grid{grid-template-columns:repeat(2,1fr)}
  .flow-steps{grid-template-columns:repeat(4,1fr);gap:28px 14px}
  .flow-step:nth-child(4)::after{display:none}
  .contact-grid{grid-template-columns:1fr;gap:40px}
  .about-intro,.case-detail-body,.service-hero{grid-template-columns:1fr}
  .about-values{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  section{padding:64px 0}
  .page-hero{padding:130px 0 60px}
  .page-hero h1{font-size:30px}
  .nav-menu{position:fixed;top:0;right:-100%;width:280px;height:100vh;background:#fff;flex-direction:column;justify-content:flex-start;align-items:flex-start;padding:90px 32px 32px;gap:18px;box-shadow:-8px 0 32px rgba(31,41,55,.1);transition:right .35s ease;z-index:100;overflow-y:auto}
  .nav-menu.open{right:0}
  .has-submenu .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;background:transparent;padding:8px 0 0 16px;display:none}
  .has-submenu.open .submenu{display:block}
  .hamburger{display:flex}
  .hero{padding:130px 0 70px}
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .hero h1{font-size:34px}
  .ai-visual{max-width:420px;margin:0 auto}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .svc-grid{grid-template-columns:1fr 1fr}
  .ai-grid{grid-template-columns:1fr}
  .stack-grid{grid-template-columns:1fr 1fr}
  .case-list-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .flow-steps{grid-template-columns:repeat(2,1fr)}
  .flow-step:nth-child(even)::after{display:none}
  .flow-step:nth-child(4)::after{display:none}
  .form-row{grid-template:1fr;grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:32px}
  .sec-title{font-size:27px}
  .about-values{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .ai-detail-card{grid-template-columns:1fr;gap:18px}
}
@media (max-width:480px){
  .svc-grid{grid-template-columns:1fr}
  .stack-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .stats-grid .num{font-size:36px}
  .logo-row{gap:28px}
  .logo-item{height:80px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}