/* ============================================================
   铁粉多AI 官网 · 全局设计系统
   广州云粉爱网络有限公司
   ============================================================ */

:root{
  /* 品牌色 */
  --brand:#2563eb;          /* 主蓝 */
  --brand-deep:#1e40af;     /* 深蓝 */
  --brand-ink:#0b1e4b;      /* 墨蓝(标题) */
  --accent:#f97316;         /* 活力橙 */
  --accent-soft:#fff7ed;    /* 橙浅底 */
  --cyan:#06b6d4;           /* 辅助青 */

  /* 渐变 */
  --grad-brand:linear-gradient(135deg,#2563eb 0%,#1e40af 100%);
  --grad-hero:linear-gradient(135deg,#0b1e4b 0%,#1e3a8a 55%,#2563eb 100%);
  --grad-accent:linear-gradient(135deg,#f97316 0%,#ea580c 100%);

  /* 中性色 */
  --bg:#ffffff;
  --bg-soft:#f8fafc;
  --bg-soft-2:#f1f5f9;
  --text:#0f172a;
  --text-soft:#475569;
  --text-mute:#94a3b8;
  --border:#e2e8f0;
  --border-soft:#eef2f7;

  /* 效果 */
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow:0 6px 24px rgba(15,23,42,.08);
  --shadow-lg:0 16px 48px rgba(30,64,175,.14);
  --shadow-accent:0 12px 32px rgba(249,115,22,.22);

  /* 尺寸 */
  --radius:14px;
  --radius-lg:22px;
  --radius-xl:30px;
  --container:1180px;
  --nav-h:68px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* ---------- 布局工具 ---------- */
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--soft{background:var(--bg-soft)}
.section--dark{background:var(--grad-hero);color:#fff}

/* ---- 多彩版块（淡色底）---- 由 main.js 按位置循环自动加上 ---- */
.section--yellow{background:#fefce8}
.section--green {background:#f0fdf4}
.section--purple{background:#faf5ff}
.section--orange{background:#fff7ed}
.section--pink  {background:#fff1f2}
.section--blue  {background:#f0f9ff}
@media(max-width:640px){.section{padding:64px 0}}

/* ---------- 区块头部 ---------- */
.sec-head{text-align:center;max-width:680px;margin:0 auto 56px}
.sec-head.left{text-align:left;margin-left:0}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.12em;
  color:var(--brand);text-transform:uppercase;margin-bottom:14px;
}
.sec-eyebrow::before{content:"";width:22px;height:2px;background:var(--grad-accent);border-radius:2px}
.sec-title{font-size:38px;font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--text)}
.sec-title .grad{
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.sec-sub{font-size:16px;color:var(--text-soft);margin-top:16px;line-height:1.8}
.section--dark .sec-title{color:#fff}
.section--dark .sec-sub{color:rgba(255,255,255,.72)}
.section--dark .sec-eyebrow{color:#93c5fd}
@media(max-width:640px){.sec-title{font-size:28px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:12px;font-size:15px;font-weight:600;
  transition:all .22s ease;white-space:nowrap;
}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-accent{background:var(--grad-accent);color:#fff;box-shadow:var(--shadow-accent)}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(249,115,22,.32)}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--border)}
.btn-ghost:hover{border-color:var(--brand);background:var(--bg-soft)}
.btn-ghost-light{background:rgba(255,255,255,.08);color:#fff;border:1.5px solid rgba(255,255,255,.25)}
.btn-ghost-light:hover{background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.5)}
.btn-lg{padding:16px 36px;font-size:16px;border-radius:14px}

/* ---------- 顶部导航 ---------- */
.nav{
  position:sticky;top:0;z-index:200;height:var(--nav-h);
  background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--border-soft);
  transition:box-shadow .25s;
}
.nav.scrolled{box-shadow:var(--shadow-sm)}
.nav-inner{max-width:var(--container);margin:0 auto;height:100%;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:18px;color:var(--brand-ink)}
.brand-mark{
  width:38px;height:38px;border-radius:10px;background:var(--grad-brand);
  display:grid;place-items:center;color:#fff;font-size:18px;font-weight:800;
  box-shadow:var(--shadow);flex-shrink:0;overflow:hidden;
}
.brand-mark img{width:100%;height:100%;object-fit:cover;display:block;border-radius:inherit}
.brand small{display:block;font-size:10px;font-weight:600;color:var(--text-mute);letter-spacing:.08em;margin-top:-2px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  padding:8px 15px;font-size:14.5px;font-weight:500;color:var(--text-soft);
  border-radius:9px;transition:all .2s;position:relative;
}
.nav-links a:hover{color:var(--brand);background:var(--bg-soft)}
.nav-links a.active{color:var(--brand);font-weight:600;background:#eff6ff}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-phone{display:flex;align-items:center;gap:7px;font-size:14px;font-weight:700;color:var(--brand-ink)}
.nav-phone svg{width:16px;height:16px;color:var(--accent)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;background:var(--bg-soft);place-items:center}
.nav-toggle svg{width:22px;height:22px;color:var(--brand-ink)}
/* 移动端菜单 */
.mobile-menu{
  display:none;position:fixed;top:var(--nav-h);left:0;right:0;z-index:190;
  background:#fff;border-bottom:1px solid var(--border);padding:12px 24px 20px;
  flex-direction:column;gap:4px;box-shadow:var(--shadow-lg);
}
.mobile-menu a{padding:13px 12px;font-size:16px;font-weight:500;color:var(--text);border-radius:10px}
.mobile-menu a.active{color:var(--brand);background:#eff6ff;font-weight:600}
.mobile-menu .btn{margin-top:12px}
.mobile-menu.open{display:flex}
@media(max-width:920px){
  .nav-links,.nav-phone{display:none}
  .nav-toggle{display:grid}
}

/* ---------- 通用 Hero ---------- */
.page-hero{
  background:var(--grad-hero);color:#fff;position:relative;overflow:hidden;
  padding:88px 0 100px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    radial-gradient(circle at 18% 20%,rgba(96,165,250,.25) 0,transparent 45%),
    radial-gradient(circle at 82% 75%,rgba(249,115,22,.22) 0,transparent 45%);
  pointer-events:none;
}
.page-hero-inner{max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;text-align:center}
.page-hero .tag{
  display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:99px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);
  font-size:13px;font-weight:600;margin-bottom:22px;
}
.page-hero .tag .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse 2s infinite}
.page-hero h1{font-size:46px;font-weight:800;letter-spacing:-.02em;line-height:1.18;margin-bottom:18px}
.page-hero p{font-size:18px;color:rgba(255,255,255,.78);max-width:640px;margin:0 auto;line-height:1.8}
.page-hero .crumbs{font-size:13px;color:rgba(255,255,255,.55);margin-top:22px}
.page-hero .crumbs a{color:rgba(255,255,255,.8)}
.page-hero .crumbs a:hover{color:#fff}
@media(max-width:640px){.page-hero{padding:64px 0 72px}.page-hero h1{font-size:32px}.page-hero p{font-size:16px}}

/* ---------- 首页 Hero ---------- */
.hero{
  background:var(--grad-hero);color:#fff;position:relative;overflow:hidden;
  padding:92px 0 120px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:
    radial-gradient(circle at 15% 15%,rgba(96,165,250,.28) 0,transparent 48%),
    radial-gradient(circle at 85% 80%,rgba(249,115,22,.22) 0,transparent 48%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;bottom:-1px;left:0;right:0;height:120px;
  background:linear-gradient(180deg,transparent,var(--bg));
}
.hero-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:2;
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:9px;padding:7px 16px;border-radius:99px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);
  font-size:13.5px;font-weight:600;margin-bottom:24px;
}
.hero-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:pulse 2s infinite}
.hero h1{font-size:52px;font-weight:800;letter-spacing:-.025em;line-height:1.12;margin-bottom:22px}
.hero h1 .hl{
  background:linear-gradient(120deg,#fbbf24,#f97316);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-desc{font-size:18px;color:rgba(255,255,255,.78);max-width:540px;line-height:1.85;margin-bottom:36px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-points{display:flex;gap:36px;margin-top:48px;flex-wrap:wrap}
.hero-point{display:flex;flex-direction:column}
.hero-point .num{font-size:30px;font-weight:800;letter-spacing:-.02em;color:#fff}
.hero-point .num i{font-style:normal;color:#fbbf24}
.hero-point .lbl{font-size:13px;color:rgba(255,255,255,.6);margin-top:2px}
/* Hero 右侧视觉 */
.hero-visual{position:relative}
.hero-screen{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius-lg);padding:26px;backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);box-shadow:0 30px 80px rgba(0,0,0,.35);
}
.hero-screen .bar{display:flex;align-items:center;gap:7px;margin-bottom:20px}
.hero-screen .bar i{width:10px;height:10px;border-radius:50%;display:block}
.hero-screen .bar i:nth-child(1){background:#f87171}.hero-screen .bar i:nth-child(2){background:#fbbf24}.hero-screen .bar i:nth-child(3){background:#34d399}
.hero-screen .flow{display:flex;flex-direction:column;gap:12px}
.flow-step{
  display:flex;align-items:center;gap:13px;padding:13px 15px;border-radius:12px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);
}
.flow-step .ic{
  width:38px;height:38px;border-radius:10px;flex-shrink:0;display:grid;place-items:center;
  background:var(--grad-brand);color:#fff;font-size:17px;font-weight:700;
}
.flow-step:nth-child(2) .ic{background:var(--grad-accent)}
.flow-step .t{font-size:14px;font-weight:600;color:#fff}
.flow-step .s{font-size:12px;color:rgba(255,255,255,.6)}
.hero-badge{
  position:absolute;display:flex;align-items:center;gap:10px;
  background:#fff;color:var(--text);padding:12px 18px;border-radius:14px;
  box-shadow:var(--shadow-lg);font-size:13px;font-weight:600;
}
.hero-badge .ic{width:34px;height:34px;border-radius:9px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;flex-shrink:0}
.hero-badge .ic svg{width:18px;height:18px}
.hero-badge small{display:block;font-size:11px;color:var(--text-mute);font-weight:500}
.hero-badge.b1{top:-16px;right:-10px}
.hero-badge.b2{bottom:-18px;left:-14px}
@media(max-width:900px){
  .hero{padding:64px 0 100px}
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .hero h1{font-size:38px}
  .hero-visual{max-width:480px}
}
@media(max-width:600px){.hero h1{font-size:32px}.hero-desc{font-size:16px}}

/* ---------- 卡片 ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

.feature-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px;transition:all .3s ease;position:relative;overflow:hidden;
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#bfdbfe}
.feature-card .icon{
  width:54px;height:54px;border-radius:14px;display:grid;place-items:center;
  margin-bottom:20px;color:#fff;background:var(--grad-brand);
}
.feature-card:nth-child(2) .icon{background:var(--grad-accent)}
.feature-card:nth-child(3) .icon{background:linear-gradient(135deg,#06b6d4,#0891b2)}
.feature-card:nth-child(4) .icon{background:linear-gradient(135deg,#8b5cf6,#6d28d9)}
.feature-card:nth-child(5) .icon{background:linear-gradient(135deg,#ec4899,#be185d)}
.feature-card:nth-child(6) .icon{background:linear-gradient(135deg,#10b981,#047857)}
.feature-card .icon svg{width:26px;height:26px}
.feature-card h3{font-size:19px;font-weight:700;margin-bottom:10px;color:var(--text)}
.feature-card p{font-size:14px;color:var(--text-soft);line-height:1.75}
.feature-card .feats{margin-top:16px;padding-top:16px;border-top:1px solid var(--border-soft)}
.feature-card .feats li{font-size:13px;color:var(--text-soft);padding:4px 0;padding-left:20px;position:relative}
.feature-card .feats li::before{content:"✓";position:absolute;left:0;color:var(--brand);font-weight:700}

/* ---------- 流程 / 闭环 ---------- */
.flow-loop{display:flex;align-items:stretch;gap:0;flex-wrap:wrap;justify-content:center}
.loop-step{
  flex:1;min-width:150px;text-align:center;padding:28px 18px;position:relative;
}
.loop-step .num{
  width:56px;height:56px;border-radius:50%;margin:0 auto 16px;display:grid;place-items:center;
  background:var(--grad-brand);color:#fff;font-size:22px;font-weight:800;box-shadow:var(--shadow);
}
.loop-step:nth-child(2) .num{background:linear-gradient(135deg,#06b6d4,#0891b2)}
.loop-step:nth-child(3) .num{background:linear-gradient(135deg,#8b5cf6,#6d28d9)}
.loop-step:nth-child(4) .num{background:var(--grad-accent)}
.loop-step:nth-child(5) .num{background:linear-gradient(135deg,#ec4899,#be185d)}
.loop-step:nth-child(6) .num{background:linear-gradient(135deg,#10b981,#047857)}
.loop-step h4{font-size:16px;font-weight:700;margin-bottom:6px}
.loop-step p{font-size:13px;color:var(--text-soft);line-height:1.6}
.loop-step .arrow{
  position:absolute;top:50%;right:-14px;transform:translateY(-50%);
  color:var(--text-mute);font-size:20px;z-index:2;
}
@media(max-width:900px){
  .loop-step{min-width:33%}
  .loop-step .arrow{display:none}
}

/* ---------- 数据条 ---------- */
.stats-bar{
  background:var(--grad-hero);border-radius:var(--radius-xl);
  padding:56px;display:grid;grid-template-columns:repeat(4,1fr);gap:32px;
  position:relative;overflow:hidden;
}
.stats-bar::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 50% 0,rgba(96,165,250,.2),transparent 60%);
}
.stat{text-align:center;position:relative}
.stat .num{font-size:40px;font-weight:800;color:#fff;letter-spacing:-.02em}
.stat .num i{font-style:normal;color:#fbbf24}
.stat .lbl{font-size:14px;color:rgba(255,255,255,.65);margin-top:6px}
@media(max-width:800px){.stats-bar{grid-template-columns:repeat(2,1fr);padding:40px 28px}.stat .num{font-size:32px}}

/* ---------- 行业卡片 ---------- */
.industry-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:36px;transition:all .3s;
}
.industry-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#fdba74}
.industry-card .head{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.industry-card .head .ic{
  width:50px;height:50px;border-radius:13px;display:grid;place-items:center;
  color:#fff;font-size:22px;background:var(--grad-accent);flex-shrink:0;
}
.industry-card h3{font-size:20px;font-weight:700}
.industry-card .pain{font-size:13px;color:var(--text-mute);margin-bottom:16px}
.industry-card ul li{font-size:14px;color:var(--text-soft);padding:6px 0;padding-left:22px;position:relative}
.industry-card ul li::before{content:"→";position:absolute;left:0;color:var(--accent);font-weight:700}

/* ---------- 关于页 ---------- */
.about-lead{font-size:19px;line-height:2;color:var(--text-soft);max-width:820px;margin:0 auto;text-align:center}
.timeline{position:relative;max-width:720px;margin:0 auto;padding-left:36px}
.timeline::before{content:"";position:absolute;left:10px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--brand),var(--accent));border-radius:2px}
.tl-item{position:relative;padding-bottom:40px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-33px;top:5px;width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid var(--brand);
}
.tl-item .year{font-size:14px;font-weight:800;color:var(--brand);letter-spacing:.05em}
.tl-item h4{font-size:18px;font-weight:700;margin:6px 0 6px}
.tl-item p{font-size:14px;color:var(--text-soft)}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
@media(max-width:800px){.contact-grid{grid-template-columns:1fr}}
.contact-item{
  display:flex;gap:16px;padding:22px;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);transition:all .25s;
}
.contact-item:hover{border-color:var(--brand);transform:translateX(4px)}
.contact-item .ic{
  width:48px;height:48px;border-radius:12px;background:#eff6ff;color:var(--brand);
  display:grid;place-items:center;flex-shrink:0;
}
.contact-item .ic svg{width:22px;height:22px}
.contact-item .info .lbl{font-size:12px;color:var(--text-mute);letter-spacing:.05em;text-transform:uppercase}
.contact-item .info .val{font-size:16px;font-weight:600;color:var(--text);word-break:break-all}
.contact-card{
  background:var(--grad-hero);border-radius:var(--radius-lg);padding:44px;color:#fff;
  position:relative;overflow:hidden;
}
.contact-card::before{
  content:"";position:absolute;top:-40%;right:-20%;width:300px;height:300px;
  border-radius:50%;background:rgba(249,115,22,.25);filter:blur(10px);
}
.contact-card h3{font-size:25px;font-weight:800;margin-bottom:12px;position:relative}
.contact-card p{font-size:15px;color:rgba(255,255,255,.8);margin-bottom:24px;line-height:1.8;position:relative}
.contact-card .phone{font-size:34px;font-weight:800;letter-spacing:-.02em;position:relative}
.contact-card .phone-label{font-size:13px;color:rgba(255,255,255,.65);margin-top:4px;position:relative}

/* ---------- CTA 横幅 ---------- */
.cta-band{
  background:var(--grad-hero);border-radius:var(--radius-xl);margin:0 24px;
  padding:64px 48px;text-align:center;color:#fff;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 30% 30%,rgba(96,165,250,.3),transparent 55%),
              radial-gradient(circle at 75% 70%,rgba(249,115,22,.25),transparent 55%);
}
.cta-band h2{font-size:32px;font-weight:800;letter-spacing:-.02em;margin-bottom:14px;position:relative}
.cta-band p{font-size:16px;color:rgba(255,255,255,.75);margin-bottom:28px;position:relative}
.cta-band .actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative}
@media(max-width:640px){.cta-band{padding:48px 28px;margin:0 16px}.cta-band h2{font-size:24px}}

/* ---------- 页脚 ---------- */
footer{background:#0b1e4b;color:#94a3b8;padding:60px 0 0;margin-top:80px}
.footer-main{max-width:var(--container);margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand{font-size:19px;font-weight:800;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:9px;font-size:16px}
.footer-desc{font-size:13.5px;line-height:1.8;max-width:320px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:13.5px;color:#94a3b8;padding:5px 0;transition:color .2s}
.footer-col a:hover{color:#93c5fd}
.footer-contact li{display:flex;gap:9px;font-size:13.5px;padding:5px 0;align-items:flex-start}
.footer-contact svg{width:16px;height:16px;color:var(--accent);flex-shrink:0;margin-top:3px}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.08);padding:20px 24px;
}
.footer-bottom-inner{
  max-width:var(--container);margin:0 auto;display:flex;flex-direction:column;
  align-items:center;text-align:center;gap:10px;font-size:12.5px;color:#64748b;
}
.footer-beian{display:flex;justify-content:center;gap:18px;align-items:center;flex-wrap:wrap}
.footer-beian a{color:#dc2626;font-weight:600}
.footer-beian a:hover{color:#b91c1c}
@media(max-width:900px){.footer-main{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.footer-main{grid-template-columns:1fr}}

/* ---------- 动效 ---------- */
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;right:24px;bottom:24px;z-index:150;width:44px;height:44px;
  border-radius:12px;background:var(--grad-brand);color:#fff;display:grid;place-items:center;
  box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:all .3s;cursor:pointer;
}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-3px)}
.back-top svg{width:20px;height:20px}

/* ---------- 联系我弹窗 ---------- */
.contact-modal{
  position:fixed;inset:0;z-index:300;background:rgba(2,8,23,.7);backdrop-filter:blur(6px);
  display:none;align-items:center;justify-content:center;padding:24px;animation:fadeIn .25s;
}
.contact-modal.show{display:flex}
.contact-modal-dialog{
  background:#fff;border-radius:24px;max-width:460px;width:100%;padding:36px 32px 28px;
  position:relative;box-shadow:0 25px 60px rgba(0,0,0,.25);animation:slideUp .35s cubic-bezier(.2,.7,.3,1);
  text-align:center;
}
.contact-modal-close{
  position:absolute;top:14px;right:14px;width:36px;height:36px;border-radius:50%;
  background:transparent;border:none;color:#64748b;font-size:24px;cursor:pointer;
  display:grid;place-items:center;transition:all .2s;
  /* 防止被其他 absolute 子级覆盖 + 兜底保证可点击 */
  z-index:2;pointer-events:auto;-webkit-tap-highlight-color:transparent;
  line-height:1;padding:0;font-family:inherit;
}
.contact-modal-close::before{content:'×';display:block;line-height:1}
.contact-modal-close:hover{background:#f1f5f9;color:#0f172a;transform:rotate(90deg)}
.contact-modal-title{font-size:22px;font-weight:700;color:#0f172a;margin:0 0 6px}
.contact-modal-sub{font-size:14px;color:#64748b;margin:0 0 22px}
.qr-frame{
  position:relative;width:240px;height:240px;margin:0 auto 18px;
  background:#fff;border-radius:18px;padding:14px;box-shadow:0 8px 28px rgba(37,99,235,.12);
  border:2px solid #e0e7ff;
}
.qr-frame::before{
  content:'';position:absolute;inset:-2px;border-radius:20px;
  background:var(--grad-brand);z-index:-1;opacity:.5;
}
.qr-frame img{width:100%;height:100%;display:block;border-radius:6px}
.qr-hint{display:flex;align-items:center;justify-content:center;gap:8px;font-size:13.5px;color:#475569;margin-bottom:18px}
.qr-hint svg{width:18px;height:18px;color:#10b981}
.contact-person{
  display:flex;align-items:center;gap:12px;background:#f8fafc;border-radius:14px;
  padding:12px 16px;margin:0 auto 18px;max-width:340px;
}
.contact-person .avatar{width:42px;height:42px;border-radius:50%;background:var(--grad-brand);color:#fff;display:grid;place-items:center;font-weight:700;font-size:16px;flex-shrink:0}
.contact-person .info{text-align:left;font-size:13.5px;color:#475569;line-height:1.55}
.contact-person .info b{color:#0f172a;font-weight:700;font-size:15px;display:block;margin-bottom:2px}
.contact-divider{height:1px;background:#e2e8f0;margin:18px 0}
.contact-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.contact-actions a{
  display:inline-flex;align-items:center;gap:6px;padding:10px 18px;border-radius:999px;
  font-size:13.5px;font-weight:600;transition:all .2s;text-decoration:none;
  border:1.5px solid #e2e8f0;color:#334155;background:#fff;
}
.contact-actions a:hover{background:#f1f5f9;border-color:#cbd5e1;transform:translateY(-1px)}
.contact-actions .phone-link{background:var(--grad-brand);color:#fff;border-color:transparent}
.contact-actions .phone-link:hover{box-shadow:0 6px 14px rgba(37,99,235,.35)}
.contact-actions svg{width:16px;height:16px}

/* OPC 客服主按钮 */
.kf-cta{
  display:flex;align-items:center;justify-content:center;gap:10px;
  width:100%;max-width:340px;margin:0 auto 14px;
  padding:14px 20px;border-radius:14px;
  background:linear-gradient(135deg,#10b981,#0ea5e9);
  color:#fff !important;font-size:16px;font-weight:700;
  text-decoration:none;box-shadow:0 8px 22px rgba(16,185,129,.35);
  transition:all .25s;letter-spacing:.5px;
}
.kf-cta:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(16,185,129,.45)}
.kf-cta svg{width:22px;height:22px}

/* 客服链接复制行 */
.kf-link-row{
  display:flex;align-items:center;gap:8px;
  max-width:340px;margin:0 auto 18px;
  padding:8px 10px;background:#f8fafc;border:1px solid #e2e8f0;
  border-radius:10px;
}
.kf-link-row .js-kf-link{
  flex:1;font-size:11.5px;color:#475569;
  font-family:ui-monospace,Menlo,Consolas,monospace;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  text-align:left;line-height:1.4;
}
.kf-link-row .js-copy-kf{
  flex-shrink:0;padding:5px 12px;border-radius:6px;
  background:var(--grad-brand);color:#fff;border:none;
  font-size:12px;font-weight:600;cursor:pointer;
  transition:all .2s;
}
.kf-link-row .js-copy-kf:hover{filter:brightness(1.1)}
.kf-link-row .js-copy-kf.copied{background:#10b981}

@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{opacity:0;transform:translateY(24px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
@media(max-width:520px){
  .contact-modal-dialog{padding:30px 22px 24px}
  .qr-frame{width:200px;height:200px}
}

/* ---------- 联系页二维码侧栏 ---------- */
.qr-hero-card{
  background:linear-gradient(135deg,#eff6ff,#fff);border:1.5px solid #dbeafe;
  border-radius:24px;padding:32px 28px;display:flex;flex-direction:column;align-items:center;
  text-align:center;
}
.qr-hero-card .qr-frame{width:200px;height:200px}
.qr-hero-card .qr-frame img{width:100%;height:100%}

/* contact.html 二维码主区布局 */
.qr-hero-grid{
  display:grid;grid-template-columns:1fr 1.4fr;gap:32px;align-items:stretch;
}
.qr-hero-side{display:flex;flex-direction:column;gap:14px}
.qr-hero-side .feature-card{flex:1}
@media(max-width:880px){
  .qr-hero-grid{grid-template-columns:1fr}
}

/* ---------- 行业标签墙 ---------- */
.industry-tags{
  display:flex;flex-wrap:wrap;gap:14px;justify-content:center;
}
.industry-tag{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 22px;border-radius:14px;
  background:#fff;border:1.5px solid #e2e8f0;
  font-size:15px;font-weight:600;color:#334155;
  transition:all .22s;cursor:default;
  box-shadow:0 1px 3px rgba(15,23,42,.04);
}
.industry-tag:hover{
  transform:translateY(-4px);border-color:#93c5fd;color:var(--brand);
  box-shadow:var(--shadow-md);
}
.industry-tag .emoji{font-size:19px;line-height:1}
.industry-tag small{font-size:12px;color:#94a3b8;font-weight:500}

/* 行业标签墙容器卡片 */
.industry-wall{
  background:linear-gradient(135deg,#eff6ff,#fff);
  border:1.5px solid #dbeafe;border-radius:24px;
  padding:40px 36px;text-align:center;
}
@media(max-width:600px){
  .industry-wall{padding:28px 20px}
  .industry-tag{padding:11px 16px;font-size:14px}
}