/* =========================================
   畅时科技 CANSE — 企业数字化基建与云服务
   主色调：腾讯云蓝  |  响应式 / 微信兼容
   ========================================= */

:root{
  --blue-700:#003CAB;
  --blue-600:#0052D9;   /* 主色 */
  --blue-500:#2B6FF2;
  --blue-400:#5B8DEF;
  --blue-100:#E8F0FE;
  --blue-50:#F4F8FF;

  --ink-900:#0F1B33;
  --ink-700:#2B3954;
  --ink-500:#5A6B86;
  --ink-300:#9AA7BD;

  --line:#E6ECF5;
  --bg:#FFFFFF;
  --bg-soft:#F6F9FF;

  --radius:14px;
  --radius-lg:22px;
  --shadow-sm:0 2px 10px rgba(15,27,51,.06);
  --shadow:0 12px 34px rgba(0,82,217,.12);
  --shadow-lg:0 24px 60px rgba(0,82,217,.18);

  --maxw:1180px;
  --header-h:80px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header-h) + 14px)}
body{
  font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink-700);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

/* 无障碍：跳转链接 + 键盘焦点可见 + 动效降级 */
.skip-link{position:absolute;left:-9999px;top:0;z-index:100;background:var(--blue-600);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;font-size:14px;font-weight:600}
.skip-link:focus{left:0}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,.nav-toggle:focus-visible,.captcha-canvas:focus-visible{outline:2px solid var(--blue-600);outline-offset:2px}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;
  transition:.25s var(--ease);cursor:pointer;border:1.5px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--blue-600);color:#fff;box-shadow:0 10px 24px rgba(0,82,217,.28)}
.btn-primary:hover{background:var(--blue-700);transform:translateY(-2px);box-shadow:0 16px 34px rgba(0,82,217,.34)}
.btn-ghost{background:#fff;color:var(--blue-600);border-color:var(--blue-100)}
.btn-ghost:hover{border-color:var(--blue-500);background:var(--blue-50);transform:translateY(-2px)}
.btn-line{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-line:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ---------- 页头 ---------- */
.header{
  position:sticky;top:0;z-index:50;height:var(--header-h);
  background:rgba(255,255,255,.86);-webkit-backdrop-filter:saturate(180%) blur(14px);backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;color:var(--ink-900);font-size:18px}
.brand img{height:52px;width:auto}
.nav-links{display:flex;align-items:center;gap:18px}
.nav-links a{
  padding:10px 18px;border-radius:10px;font-size:15px;color:var(--ink-700);font-weight:500;transition:.2s;
}
.nav-links a:hover{color:var(--blue-600);background:var(--blue-50)}
.nav-links a.active{color:var(--blue-600);background:var(--blue-100)}
.nav-links a.btn-primary{color:#fff}
.nav-links a.btn-primary:hover{color:#fff;background:var(--blue-700);box-shadow:0 16px 34px rgba(0,82,217,.34);transform:translateY(-2px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2.5px;background:var(--ink-900);border-radius:2px;transition:.3s var(--ease)}

/* ---------- 区块通用 ---------- */
.section{padding:88px 0;scroll-margin-top:calc(var(--header-h) + 14px)}
.section-head{max-width:680px;margin:0 auto 52px;text-align:center}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:1px;
  color:var(--blue-600);background:var(--blue-100);padding:5px 14px;border-radius:999px;margin-bottom:16px;
}
.section-head h2{font-size:34px;color:var(--ink-900);letter-spacing:-.5px;line-height:1.3}
.section-head p{margin-top:14px;color:var(--ink-500);font-size:16px}
.bg-soft{background:var(--bg-soft)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    linear-gradient(135deg, rgba(0,60,171,.82) 0%, rgba(0,82,217,.72) 55%, rgba(43,111,242,.80) 100%),
    #003CAB url(../img/hero-bg.jpg) center/cover no-repeat;
  color:#fff;
}
/* 关于我们页横幅：仰视筒仓 */
.hero-about{
  background:
    linear-gradient(135deg, rgba(0,60,171,.78) 0%, rgba(0,82,217,.68) 55%, rgba(43,111,242,.76) 100%),
    #003CAB url(../img/about-hero-bg.jpg?v=3) center/cover no-repeat;
}
/* 主营业务页横幅：科技 AI 机器人 */
.hero-services{
  background:
    linear-gradient(135deg, rgba(0,60,171,.82) 0%, rgba(0,82,217,.72) 55%, rgba(43,111,242,.80) 100%),
    #003CAB url(../img/services-hero-bg.jpg) center/cover no-repeat;
}
/* 联系我们页横幅：合作握手拼图 */
.hero-contact{
  background:
    linear-gradient(135deg, rgba(0,60,171,.82) 0%, rgba(0,82,217,.72) 55%, rgba(43,111,242,.80) 100%),
    #003CAB url(../img/contact-hero-bg.jpg) center/cover no-repeat;
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px) 0 0/26px 26px,
    linear-gradient(100deg, rgba(6,16,40,.82) 0%, rgba(6,16,40,.52) 46%, rgba(6,16,40,.12) 78%, rgba(6,16,40,0) 100%);
}
.hero-inner{position:relative;z-index:2;padding:72px 0 80px;max-width:760px}
.hero .tag{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  padding:7px 16px;border-radius:999px;margin-bottom:24px;
}
.hero .tag .dot{width:8px;height:8px;border-radius:50%;background:#7CF2B0;box-shadow:0 0 0 4px rgba(124,242,176,.25)}
.hero h1{font-size:48px;line-height:1.2;letter-spacing:-1px;font-weight:800}
.hero h1 .hl{color:#9FC4FF}
.hero p.lead{margin-top:22px;font-size:18px;color:rgba(255,255,255,.9);max-width:620px}
.hero-cta{margin-top:36px;display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{position:relative;z-index:2;display:flex;gap:48px;flex-wrap:wrap;padding:32px 0 56px;border-top:1px solid rgba(255,255,255,.14)}
.hero-stats .item .n{font-size:30px;font-weight:800}
.hero-stats .item .t{font-size:14px;color:rgba(255,255,255,.8)}

/* ===== 首页横幅动态效果 ===== */
/* 背景双光晕缓慢漂浮 */
.hero::before{
  content:"";position:absolute;inset:-15% -10%;z-index:0;pointer-events:none;
  background:
    radial-gradient(540px 540px at 72% 28%, rgba(124,242,176,.20), transparent 60%),
    radial-gradient(460px 460px at 18% 82%, rgba(159,196,255,.18), transparent 60%);
  animation:heroOrbs 18s ease-in-out infinite alternate;
}
@keyframes heroOrbs{
  0%{transform:translate3d(-3%,2%,0) scale(1)}
  100%{transform:translate3d(4%,-3%,0) scale(1.1)}
}
/* 内容错峰入场 */
.hero-inner>*{animation:fadeUp .7s cubic-bezier(.2,.7,.2,1) both}
.hero-inner .tag{animation-delay:.05s}
.hero-inner h1{animation-delay:.16s}
.hero-inner p.lead{animation-delay:.28s}
.hero-cta{animation-delay:.4s}
.hero-stats{animation:fadeUp .7s .52s cubic-bezier(.2,.7,.2,1) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
/* 状态点呼吸脉冲 */
.hero .tag .dot{animation:dotPulse 2.6s ease-in-out infinite}
@keyframes dotPulse{
  0%,100%{box-shadow:0 0 0 4px rgba(124,242,176,.25)}
  50%{box-shadow:0 0 0 8px rgba(124,242,176,.10)}
}
/* 尊重无障碍：减少动态偏好时关闭动画 */
@media (prefers-reduced-motion: reduce){
  .hero::before,.hero .tag .dot{animation:none}
  .hero-inner>*,.hero-stats{animation:none;opacity:1;transform:none}
}

/* ---------- 卡片网格 ---------- */
.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)}
.grid-5{grid-template-columns:repeat(5,1fr)}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;
  transition:.28s var(--ease);position:relative;overflow:hidden;
}

.card .ico{
  width:56px;height:56px;border-radius:14px;display:grid;place-items:center;
  background:var(--blue-100);color:var(--blue-600);margin-bottom:18px;
}
.card h3{font-size:20px;color:var(--ink-900);margin-bottom:10px}
.card p{color:var(--ink-500);font-size:15px}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;color:var(--blue-600);font-weight:600;font-size:14px}
.card .more svg{transition:transform .25s var(--ease)}

/* service detail block */
.svc{padding:64px 0;border-bottom:1px solid var(--line)}
.svc:last-child{border-bottom:none}
.svc .row{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.svc.alt .row{direction:rtl}
.svc.alt .row>*{direction:ltr}
.svc .visual{
  border-radius:var(--radius-lg);min-height:260px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,var(--blue-600),var(--blue-500));position:relative;overflow:hidden;
}
.svc .visual::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.22) 1px,transparent 1px);background-size:22px 22px;opacity:.6}
.svc .visual .v-ico{position:relative;z-index:2}
.svc h3{font-size:26px;color:var(--ink-900);margin-bottom:8px}
.svc .sub{color:var(--blue-600);font-weight:600;margin-bottom:16px}
.svc p{color:var(--ink-500);margin-bottom:18px}
.svc ul.chk li{display:flex;gap:10px;align-items:flex-start;margin-bottom:10px;color:var(--ink-700)}
.svc ul.chk li svg{flex:none;margin-top:4px;color:var(--blue-600)}

/* ---------- 优势 ---------- */
.feature{display:flex;gap:16px;align-items:flex-start;padding:24px;border-radius:var(--radius);transition:.25s}
/* hover 位移见文末 UI 增强层 @media(hover:hover) */
.feature .fi{flex:none;width:48px;height:48px;border-radius:12px;background:var(--blue-100);color:var(--blue-600);display:grid;place-items:center}
.feature h4{font-size:18px;color:var(--ink-900);margin-bottom:4px}
.feature p{font-size:14px;color:var(--ink-500)}

/* ---------- 关于我们 ---------- */
.about-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.about-copy p{color:var(--ink-500);margin-bottom:16px}
.about-copy .lead{font-size:18px;color:var(--ink-900);font-weight:600;line-height:1.6}
.about-side{background:linear-gradient(150deg,#003CAB,#2B6FF2);color:#fff;border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow)}
.about-side h4{font-size:15px;opacity:.85;font-weight:600;margin-bottom:18px;letter-spacing:.5px}
.about-side .stat{display:flex;justify-content:space-between;align-items:baseline;padding:14px 0;border-top:1px solid rgba(255,255,255,.18)}
.about-side .stat:first-of-type{border-top:none}
.about-side .stat .v{font-size:26px;font-weight:800}
.about-side .stat .k{font-size:14px;opacity:.85}

/* ---------- 联系我们 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:stretch}
.contact-info{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-sm)}
.contact-info .info-item{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.contact-info .info-item:last-child{border-bottom:none}
.contact-info .info-item .ic{flex:none;width:46px;height:46px;border-radius:12px;background:var(--blue-100);color:var(--blue-600);display:grid;place-items:center}
.contact-info .info-item .t{font-size:13px;color:var(--ink-300);letter-spacing:.5px}
.contact-info .info-item .v{font-size:17px;color:var(--blue-600);font-weight:400;word-break:break-all}
.contact-info .info-item .v a{color:var(--blue-600)}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-sm)}
.form h3{font-size:20px;color:var(--ink-900);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--ink-700);margin-bottom:7px;font-weight:500}
.field input,.field textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;
  font-family:inherit;color:var(--ink-900);background:var(--bg-soft);transition:.2s;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue-500);background:#fff;box-shadow:0 0 0 4px var(--blue-100)}
.field textarea{resize:vertical;min-height:110px}
.form .note{font-size:13px;color:var(--ink-300);margin-top:12px;text-align:center}

/* 验证码 */
.captcha-row{display:flex;align-items:center;gap:10px}
.captcha-field .captcha-row input{flex:1;min-width:0}
.captcha-canvas{
  height:44px;width:120px;border:1.5px solid var(--line);border-radius:10px;
  background:#f3f6fc;cursor:pointer;flex:none;display:block;
}
.captcha-canvas:focus{outline:none;border-color:var(--blue-500);box-shadow:0 0 0 4px var(--blue-100)}
.captcha-refresh{
  flex:none;width:44px;height:44px;border:1.5px solid var(--line);border-radius:10px;
  background:#fff;color:var(--blue-600);font-size:20px;line-height:1;cursor:pointer;
  transition:.2s;display:inline-flex;align-items:center;justify-content:center;
}
.captcha-refresh:hover{background:var(--blue-50);border-color:var(--blue-500)}
.captcha-refresh:active{transform:rotate(90deg)}
.captcha-error{display:none;margin-top:8px;font-size:13px;color:#e5484d;font-weight:500}
.captcha-error.show{display:block}


/* ---------- 页脚 CTA ---------- */
.cta-band{
  background:linear-gradient(135deg,#003CAB,#2B6FF2);color:#fff;text-align:center;
  border-radius:var(--radius-lg);padding:56px 32px;position:relative;overflow:hidden;
}
.cta-band::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1px);background-size:24px 24px;opacity:.5}
.cta-band>*{position:relative;z-index:2}
.cta-band h2{font-size:30px;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.9);margin-bottom:26px;font-size:17px}

/* ---------- 页脚 ---------- */
.footer{background:var(--ink-900);color:#C7D2E6;padding:56px 0 28px}
.footer .top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer .brand{color:#fff;margin-bottom:14px}
.footer .brand img{filter:brightness(0) invert(1);height:44px}
.footer p.d{font-size:14px;color:#9AA7BD;max-width:340px}
.footer h5{color:#fff;font-size:15px;margin-bottom:16px}
.footer ul li{margin-bottom:10px}
.footer ul li a{color:#C7D2E6;font-size:14px;transition:.2s}
.footer ul li a:hover{color:#fff}
.footer .bottom{display:flex;flex-direction:column;align-items:center;gap:8px;padding-top:22px;font-size:13px;color:#8794AC;text-align:center}
.footer .beian{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:18px;margin-top:2px}
.footer .beian a{color:#8794AC;display:inline-flex;align-items:center;gap:5px;transition:.2s}
.footer .beian a:hover{color:#fff}
.footer .beian-ico{width:14px;height:14px;fill:#8794AC;transition:.2s}
.footer .beian a:hover .beian-ico{fill:#fff}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-5{grid-template-columns:repeat(3,1fr)}
  .about-wrap{grid-template-columns:1fr;gap:30px}
  .svc .row{grid-template-columns:1fr;gap:26px}
  .svc.alt .row{direction:ltr}
  .contact-grid{grid-template-columns:1fr;gap:28px}
  .footer .top{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  :root{--header-h:72px}
  .section{padding:64px 0}
  .hero-inner{padding:64px 0 72px}
  .hero h1{font-size:32px}
  .hero p.lead{font-size:16px}
  .section-head h2{font-size:26px}
  .brand img{height:48px}
  .nav-links{
    position:fixed;top:var(--header-h);left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;
    gap:0;padding:10px 18px 22px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-sm);
    transform:translateY(-130%);transition:transform .32s var(--ease);max-height:calc(100vh - var(--header-h));overflow:auto;
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:14px 12px;border-radius:10px;font-size:16px}
  .nav-links .btn{margin:8px 12px 0;justify-content:center}
  .nav-toggle{display:flex}
  .nav-toggle.active span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
  .nav-toggle.active span:nth-child(2){opacity:0}
  .nav-toggle.active span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
  .grid-2,.grid-3,.grid-4,.grid-5{grid-template-columns:1fr}
  .hero-stats{gap:24px}
  .footer .top{grid-template-columns:1fr;gap:26px}
  .cta-band h2{font-size:24px}
}

/* =========================================================
   UI 优化增强层（2026-09-11 全站统一升级）
   ========================================================= */

/* 文本选区品牌色 */
::selection{background:var(--blue-100);color:var(--blue-700)}

/* 标题与正文换行优化（现代浏览器生效，旧浏览器自动忽略） */
h1,h2,h3,h4{text-wrap:balance}
.section-head p,.card p,.feature p,.about-copy p{text-wrap:pretty}

/* 按钮：去除移动端点击高亮，增加点击下压反馈 */
.btn{will-change:transform;-webkit-tap-highlight-color:transparent}
.btn:active{transform:translateY(0) scale(.97);transition-duration:.08s}
.btn-primary:active,.btn-ghost:active,.btn-line:active{transform:translateY(0) scale(.97)}

/* 仅在支持悬停的设备启用悬停位移，避免移动端点击后样式“粘住” */
@media (hover:hover){
  .card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--blue-100)}
  .card:hover .more svg{transform:translateX(4px)}
  .feature:hover{background:var(--blue-50)}
  .nav-links a:hover{color:var(--blue-600);background:var(--blue-50)}
  .btn-primary:hover{background:var(--blue-700);transform:translateY(-2px);box-shadow:0 16px 34px rgba(0,82,217,.34)}
  .btn-ghost:hover{border-color:var(--blue-500);background:var(--blue-50);transform:translateY(-2px)}
  .btn-line:hover{background:rgba(255,255,255,.12);border-color:#fff}
  .nav-links a.btn-primary:hover{color:#fff;background:var(--blue-700);box-shadow:0 16px 34px rgba(0,82,217,.34);transform:translateY(-2px)}
  .footer ul li a:hover{color:#fff}
  .footer .beian a:hover{color:#fff}
  .footer .beian a:hover .beian-ico{fill:#fff}
  .captcha-refresh:hover{background:var(--blue-50);border-color:var(--blue-500)}
}

/* 滚动入场（由 main.js 触发 .is-visible；无 JS / 减弱动效时元素默认可见） */
.reveal{opacity:0;transform:translateY(22px)}
.reveal.is-visible{opacity:1;transform:none;transition:opacity .6s var(--ease),transform .6s var(--ease)}

/* 移动端细节收紧 */
@media (max-width:760px){
  .about-side{padding:30px}
  .contact-info,.form{padding:24px}
  .section-head{margin-bottom:38px}
  .hero-stats .n{font-size:26px}
}
@media (max-width:480px){
  .hero h1{font-size:27px}
  .section{padding:54px 0}
  .hero-stats{gap:18px}
  .cta-band{padding:40px 22px}
  .cta-band h2{font-size:21px}
}