/* =========================================================================
   H2VM.cn 国内站设计系统 · cn.css
   白色商业软件风：白色/浅灰背景 + 品牌蓝主色 + 青蓝/紫色局部强调
   与国际站（深色科技风）明确区分；大标题、明确数字、真实产品画面优先。
   ========================================================================= */

:root{
  --blue-700:#0b2a6b;
  --blue-600:#1e5eff;
  --blue-500:#3d78ff;
  --blue-100:#e8f0ff;
  --blue-50:#f4f8ff;
  --cyan-600:#0093ad;
  --cyan-500:#00b8d4;
  --purple-600:#6a45f5;
  --purple-500:#8b6bff;
  --ink-900:#0d1b33;
  --ink-800:#1a2a47;
  --ink-700:#33415e;
  --ink-600:#4d5c78;
  --ink-500:#6b7a95;
  --ink-400:#93a1b8;
  --line:#e6ecf6;
  --line-strong:#d3dcEC;
  --bg:#ffffff;
  --bg-soft:#f7f9fd;
  --bg-tint:#eef4ff;
  --ok:#16a34a;
  --radius-xl:22px;
  --radius-lg:18px;
  --radius-md:13px;
  --radius-sm:9px;
  --shadow-xs:0 1px 2px rgba(13,27,51,.05);
  --shadow-sm:0 6px 18px rgba(13,27,51,.07);
  --shadow-md:0 16px 40px rgba(13,27,51,.10);
  --shadow-lg:0 28px 70px rgba(11,42,107,.16);
  --container:1200px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px;}
body{
  margin:0;font-family:var(--font);color:var(--ink-800);background:var(--bg);
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--blue-600);text-decoration:none;}
a:hover{color:var(--blue-700);}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.25;font-weight:800;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------------- 图标（内联 SVG，零字体依赖） ---------------- */
.ico{width:1em;height:1em;flex:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;fill:none;display:inline-block;vertical-align:-.14em;}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,var(--blue-600),var(--blue-500));color:#fff;box-shadow:0 8px 22px rgba(30,94,255,.28);}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(30,94,255,.38);}
.btn-ghost{background:#fff;color:var(--ink-800);border-color:var(--line-strong);}
.btn-ghost:hover{color:var(--blue-600);border-color:var(--blue-500);background:var(--blue-50);}
.btn-outline{background:transparent;color:var(--blue-600);border-color:rgba(30,94,255,.35);}
.btn-outline:hover{background:var(--blue-600);color:#fff;border-color:var(--blue-600);}
.btn-sm{padding:9px 18px;font-size:13.5px;}
.btn-lg{padding:16px 34px;font-size:16.5px;}
.btn-block{width:100%;}

/* ---------------- 顶部导航（白色） ---------------- */
.site-nav{
  position:sticky;top:0;z-index:120;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(13px);border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-nav.scrolled{box-shadow:0 8px 30px rgba(13,27,51,.09);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:74px;}
.brand{display:flex;align-items:center;gap:11px;flex:none;}
.brand-mark{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;flex:none;
  background:linear-gradient(135deg,var(--blue-600),var(--cyan-500));
  color:#fff;font-weight:900;font-size:19px;letter-spacing:.02em;
  box-shadow:0 6px 16px rgba(30,94,255,.32);
}
.brand-txt strong{display:block;font-size:17.5px;font-weight:800;color:var(--ink-900);line-height:1.24;letter-spacing:.01em;}
.brand-txt span{display:block;font-size:10.5px;color:var(--ink-400);letter-spacing:.22em;font-weight:600;}

.nav-menu{display:flex;align-items:center;gap:2px;}
.nav-menu>li{position:relative;}
.nav-menu>li>a{
  display:flex;align-items:center;gap:5px;padding:9px 12px;border-radius:9px;
  font-size:15px;font-weight:600;color:var(--ink-700);transition:color .18s,background .18s;
}
.nav-menu>li>a:hover,.nav-menu>li>a.active{color:var(--blue-600);background:var(--blue-50);}
.nav-menu>li>a .ico{width:14px;height:14px;stroke-width:2.4;transition:transform .2s;}
.nav-menu>li.dd-open>a .ico,.nav-menu>li:hover>a .ico{transform:rotate(180deg);}
.nav-dd{
  position:absolute;top:calc(100% + 8px);left:0;min-width:216px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-md);
  padding:8px;opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s;z-index:5;
}
.nav-menu>li:hover .nav-dd,.nav-menu>li.dd-open .nav-dd{opacity:1;visibility:visible;transform:none;}
.nav-dd a{display:flex;align-items:center;gap:9px;padding:9px 12px;border-radius:8px;font-size:14.5px;color:var(--ink-700);font-weight:500;}
.nav-dd a:hover{background:var(--blue-50);color:var(--blue-600);}
.nav-dd a .ico{width:16px;height:16px;color:var(--blue-500);}
.nav-dd .dd-h{padding:6px 12px 4px;font-size:11px;letter-spacing:.14em;color:var(--ink-400);font-weight:700;}

.nav-right{display:flex;align-items:center;gap:10px;flex:none;}
.nav-login{font-size:14.5px;font-weight:600;color:var(--ink-700);padding:9px 12px;border-radius:9px;}
.nav-login:hover{color:var(--blue-600);background:var(--blue-50);}
.nav-toggle{display:none;background:none;border:0;padding:8px;border-radius:9px;cursor:pointer;color:var(--ink-800);}
.nav-toggle .ico{width:24px;height:24px;}

.mobile-nav{
  position:fixed;inset:74px 0 0;z-index:110;background:#fff;overflow-y:auto;
  padding:14px 22px 40px;transform:translateX(100%);transition:transform .3s ease;
}
.mobile-nav.open{transform:none;}
.mobile-nav a{display:block;padding:13px 4px;font-size:16.5px;font-weight:600;color:var(--ink-800);border-bottom:1px solid var(--line);}
.mobile-nav a:hover{color:var(--blue-600);}
.mobile-nav .m-sub{padding-left:14px;}
.mobile-nav .m-sub a{font-size:15px;color:var(--ink-600);}
.mobile-nav .m-h{padding:16px 4px 6px;font-size:11.5px;letter-spacing:.16em;color:var(--ink-400);font-weight:700;}
.mobile-nav .btn{margin-top:18px;}

/* ---------------- 区块 ---------------- */
.band{padding:92px 0;}
.band-tight{padding:66px 0;}
.band-soft{background:var(--bg-soft);}
.band-tint{background:linear-gradient(180deg,var(--blue-50),#fff);}
.band-line{border-top:1px solid var(--line);}
.sec-head{max-width:820px;margin:0 auto 52px;text-align:center;}
.sec-head.left{margin-left:0;text-align:left;max-width:760px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:800;
  letter-spacing:.16em;color:var(--blue-600);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:20px;height:2px;background:currentColor;border-radius:2px;opacity:.75;}
.sec-h2{font-size:clamp(26px,3.4vw,40px);font-weight:800;}
.sec-sub{margin-top:16px;font-size:17px;color:var(--ink-500);line-height:1.75;}
.sec-note{margin-top:12px;font-size:13.5px;color:var(--ink-400);}

/* ---------------- 首屏 ---------------- */
.hero{
  position:relative;overflow:hidden;padding:74px 0 84px;
  background:
    radial-gradient(760px 420px at 88% -10%,rgba(0,184,212,.13),transparent 62%),
    radial-gradient(680px 380px at 6% 8%,rgba(30,94,255,.10),transparent 60%),
    linear-gradient(180deg,#f6faff,#fff 72%);
}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:54px;align-items:center;}
.hero h1{font-size:clamp(32px,4.6vw,56px);line-height:1.14;letter-spacing:-.02em;}
.hero h1 em{font-style:normal;color:var(--blue-600);position:relative;white-space:nowrap;}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.32em;z-index:-1;
  background:linear-gradient(90deg,rgba(30,94,255,.18),rgba(0,184,212,.18));border-radius:4px;
}
.hero-lead{margin-top:22px;font-size:18px;color:var(--ink-600);line-height:1.78;max-width:640px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px;}
.hero-tags span{
  display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);
  color:var(--ink-700);border-radius:999px;padding:7px 15px;font-size:13.5px;font-weight:600;
  box-shadow:var(--shadow-xs);
}
.hero-tags .ico{width:15px;height:15px;color:var(--blue-500);}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-punch{
  display:inline-flex;align-items:center;gap:9px;margin-top:26px;padding:11px 18px;
  background:#fff;border:1px dashed rgba(30,94,255,.35);border-radius:var(--radius-md);
  font-size:14.5px;font-weight:700;color:var(--blue-700);
}
.hero-punch .ico{width:17px;height:17px;color:var(--cyan-600);}
.hero-trust{margin-top:24px;display:flex;flex-wrap:wrap;gap:18px;font-size:13.5px;color:var(--ink-500);}
.hero-trust b{color:var(--ink-800);}

/* 真实画面框 */
.shot{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);overflow:hidden;
}
.shot-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;background:var(--bg-soft);border-bottom:1px solid var(--line);}
.shot-bar i{width:9px;height:9px;border-radius:50%;background:#dbe3f0;display:block;}
.shot-bar i:first-child{background:#ff6058;}
.shot-bar i:nth-child(2){background:#ffbd2e;}
.shot-bar i:nth-child(3){background:#28c840;}
.shot-bar span{margin-left:8px;font-size:11.5px;color:var(--ink-400);letter-spacing:.04em;}
.shot-body{background:#fff;}

/* 首屏演示流程 */
.flow{display:grid;gap:0;padding:20px 22px 22px;}
.flow-step{display:flex;gap:14px;padding:13px 0;border-bottom:1px dashed var(--line);}
.flow-step:last-child{border-bottom:0;}
.flow-num{
  width:32px;height:32px;flex:none;border-radius:10px;display:grid;place-items:center;
  background:var(--blue-100);color:var(--blue-700);font-weight:800;font-size:14px;
}
.flow-step:last-child .flow-num{background:linear-gradient(135deg,var(--blue-600),var(--cyan-500));color:#fff;}
.flow-txt b{display:block;font-size:14.5px;color:var(--ink-900);}
.flow-txt span{font-size:13px;color:var(--ink-500);}

/* ---------------- 功能矩阵 ---------------- */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.feat{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:24px 22px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.feat:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:transparent;}
.feat-ico{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:14px;
  background:var(--blue-100);color:var(--blue-600);
}
.feat-ico .ico{width:22px;height:22px;}
.feat:nth-child(4n+2) .feat-ico{background:#e6f8fb;color:var(--cyan-600);}
.feat:nth-child(4n+3) .feat-ico{background:#efeaff;color:var(--purple-600);}
.feat:nth-child(4n) .feat-ico{background:#eaf1ff;color:var(--blue-700);}
.feat h3{font-size:16.5px;margin-bottom:7px;}
.feat p{font-size:14px;color:var(--ink-600);line-height:1.68;}

/* ---------------- 场景大卡（四大营销入口） ---------------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.scene{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-xl);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .24s ease,box-shadow .24s ease;
}
.scene:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);}
.scene-media{background:var(--bg-tint);border-bottom:1px solid var(--line);padding:22px 22px 0;min-height:186px;}
.scene-media img{border-radius:var(--radius-md) var(--radius-md) 0 0;box-shadow:0 -2px 0 rgba(0,0,0,0);}
.scene-media.mock{display:grid;place-items:center;padding:26px;}
.scene-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1;}
.scene-tag{
  align-self:flex-start;font-size:12px;font-weight:800;letter-spacing:.1em;border-radius:999px;
  padding:5px 12px;background:var(--blue-100);color:var(--blue-700);margin-bottom:13px;
}
.scene:nth-child(2) .scene-tag{background:#e6f8fb;color:var(--cyan-600);}
.scene:nth-child(3) .scene-tag{background:#efeaff;color:var(--purple-600);}
.scene:nth-child(4) .scene-tag{background:#eaf1ff;color:var(--blue-700);}
.scene h3{font-size:21px;margin-bottom:10px;}
.scene .pitch{font-size:15px;color:var(--ink-700);font-weight:600;margin-bottom:9px;}
.scene p.dsc{font-size:14.5px;color:var(--ink-600);flex:1;}
.scene-foot{margin-top:20px;}
.scene-foot a{display:inline-flex;align-items:center;gap:7px;font-size:14.5px;font-weight:700;color:var(--blue-600);}
.scene-foot a .ico{width:16px;height:16px;transition:transform .2s;}
.scene-foot a:hover .ico{transform:translateX(4px);}

/* ---------------- 对话演示（真实界面感） ---------------- */
.demo-wrap{display:grid;grid-template-columns:1fr 1.02fr;gap:50px;align-items:center;}
.chat{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow-lg);
}
.chat-head{
  display:flex;align-items:center;gap:11px;padding:14px 18px;
  background:linear-gradient(135deg,var(--blue-700),var(--blue-600));color:#fff;
}
.chat-head .av{
  width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.18);
  display:grid;place-items:center;flex:none;
}
.chat-head .av .ico{width:19px;height:19px;}
.chat-head b{display:block;font-size:14.5px;font-weight:700;}
.chat-head span{display:block;font-size:11.5px;opacity:.85;}
.chat-head .live{margin-left:auto;display:inline-flex;align-items:center;gap:6px;font-size:11.5px;background:rgba(255,255,255,.16);padding:4px 11px;border-radius:999px;}
.chat-head .live i{width:7px;height:7px;border-radius:50%;background:#4ade80;display:block;}
.chat-body{padding:20px 18px;background:var(--bg-soft);display:grid;gap:13px;}
.bub{max-width:84%;padding:12px 15px;border-radius:14px;font-size:14.2px;line-height:1.66;}
.bub.in{background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px;color:var(--ink-700);}
.bub.out{
  justify-self:end;background:linear-gradient(135deg,var(--blue-600),var(--blue-500));color:#fff;
  border-bottom-right-radius:4px;box-shadow:0 6px 16px rgba(30,94,255,.22);
}
.bub b{font-weight:700;}
.lead-card{
  background:#fff;border:1px solid rgba(30,94,255,.3);border-radius:var(--radius-md);padding:15px 16px;
  font-size:13.5px;color:var(--ink-600);
}
.lead-card .lc-h{display:flex;align-items:center;gap:8px;font-weight:800;color:var(--blue-700);font-size:14px;margin-bottom:10px;}
.lead-card .lc-h .ico{width:17px;height:17px;color:var(--cyan-600);}
.lead-card ul{display:grid;gap:7px;}
.lead-card li{display:flex;gap:9px;align-items:flex-start;}
.lead-card li .ico{width:15px;height:15px;color:var(--ok);margin-top:4px;}

/* ---------------- 数据条 ---------------- */
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center;}
.stat-cell{padding:26px 16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);}
.stat-num{font-size:36px;font-weight:900;color:var(--blue-600);letter-spacing:-.02em;font-variant-numeric:tabular-nums;}
.stat-lab{margin-top:6px;font-size:13.5px;color:var(--ink-500);}

/* ---------------- 案例 ---------------- */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.case{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .24s ease,box-shadow .24s ease;
}
.case:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);}
.case-thumb{
  aspect-ratio:16/10;background:linear-gradient(135deg,#eef4ff,#e6f8fb);
  display:grid;place-items:center;border-bottom:1px solid var(--line);padding:20px;
}
.case-thumb .ph{
  width:100%;height:100%;border-radius:10px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);padding:16px;display:flex;flex-direction:column;gap:8px;
}
.case-thumb .ph i{display:block;height:9px;border-radius:5px;background:var(--line);}
.case-thumb .ph i.w60{width:60%;}
.case-thumb .ph i.w85{width:85%;}
.case-thumb .ph i.brand{height:22px;background:linear-gradient(135deg,var(--blue-600),var(--cyan-500));width:44%;}
.case-thumb .ph i.grid3{height:34px;background:var(--bg-soft);width:100%;}
.case-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1;}
.case-body .c-ind{font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--blue-600);margin-bottom:9px;}
.case-body h3{font-size:17.5px;margin-bottom:9px;}
.case-body p{font-size:14px;color:var(--ink-600);flex:1;}
.case-feats{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px;}
.case-feats span{font-size:12px;background:var(--bg-soft);border:1px solid var(--line);color:var(--ink-600);border-radius:999px;padding:4px 11px;}
.case-foot{margin-top:16px;padding-top:15px;border-top:1px solid var(--line);}
.case-foot a{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:700;}
.case-foot a .ico{width:15px;height:15px;}

/* ---------------- 价格 ---------------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.plan{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-xl);padding:32px 28px;
  display:flex;flex-direction:column;
}
.plan.hot{border-color:rgba(30,94,255,.5);box-shadow:var(--shadow-lg);position:relative;}
.plan.hot::after{
  content:"最多人选";position:absolute;top:-13px;right:26px;background:linear-gradient(135deg,var(--blue-600),var(--cyan-500));
  color:#fff;font-size:12px;font-weight:800;padding:5px 14px;border-radius:999px;letter-spacing:.06em;
}
.plan-name{font-size:20px;font-weight:800;}
.plan-for{margin-top:8px;font-size:14px;color:var(--ink-500);min-height:44px;}
.plan-price{margin-top:18px;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.plan-price b{font-size:15px;color:var(--ink-900);}
.plan-price span{display:block;font-size:13px;color:var(--ink-500);margin-top:5px;}
.plan ul{margin-top:22px;display:grid;gap:11px;flex:1;}
.plan li{display:flex;gap:10px;font-size:14.2px;color:var(--ink-700);align-items:flex-start;}
.plan li .ico{width:16px;height:16px;color:var(--blue-600);margin-top:4px;}
.plan .btn{margin-top:26px;}

/* ---------------- 渠道 / 合作方 ---------------- */
.chip-grid{display:flex;flex-wrap:wrap;gap:11px;}
.chip-grid span{
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 18px;
  font-size:14px;font-weight:600;color:var(--ink-700);box-shadow:var(--shadow-xs);
}

/* ---------------- 步骤 ---------------- */
.steps{display:grid;gap:16px;}
.step{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px 24px;}
.step-n{
  width:40px;height:40px;flex:none;border-radius:12px;display:grid;place-items:center;font-weight:900;
  background:linear-gradient(135deg,var(--blue-600),var(--cyan-500));color:#fff;font-size:16px;
}
.step h4{font-size:17px;margin-bottom:6px;}
.step p{font-size:14.3px;color:var(--ink-600);}

/* ---------------- FAQ ---------------- */
.faq{max-width:900px;margin:0 auto;}
.faq-i{border:1px solid var(--line);border-radius:var(--radius-md);background:#fff;margin-bottom:12px;overflow:hidden;}
.faq-q{
  width:100%;text-align:left;background:none;border:0;cursor:pointer;padding:19px 22px;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  font-size:16px;font-weight:700;color:var(--ink-900);
}
.faq-q .ico{width:18px;height:18px;color:var(--blue-600);transition:transform .26s;flex:none;}
.faq-i.open .faq-q .ico{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-a p{padding:0 22px 20px;font-size:14.6px;color:var(--ink-600);}

/* ---------------- CTA ---------------- */
.cta{
  border-radius:var(--radius-xl);padding:58px 48px;text-align:center;color:#fff;position:relative;overflow:hidden;
  background:linear-gradient(128deg,var(--blue-700),var(--blue-600) 52%,var(--cyan-600));
  box-shadow:var(--shadow-lg);
}
.cta h2{color:#fff;font-size:clamp(24px,3.2vw,36px);}
.cta p{margin-top:14px;font-size:16px;opacity:.94;max-width:660px;margin-left:auto;margin-right:auto;}
.cta .row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px;}
.cta .btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.5);}
.cta .btn-ghost:hover{background:#fff;color:var(--blue-700);border-color:#fff;}
.cta .btn-primary{background:#fff;color:var(--blue-700);box-shadow:0 10px 26px rgba(0,0,0,.16);}
.cta .btn-primary:hover{color:var(--blue-700);}
.cta-note{margin-top:18px;font-size:13px;opacity:.82;}

/* ---------------- 表单 ---------------- */
.form-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow-sm);}
.form-panel h3{font-size:20px;margin-bottom:7px;}
.form-panel .fp-sub{font-size:14px;color:var(--ink-500);margin-bottom:20px;}
.field{display:grid;gap:6px;margin-bottom:13px;}
.field label{font-size:13px;font-weight:600;color:var(--ink-700);}
.field input,.field textarea,.field select{
  width:100%;padding:12px 15px;border:1px solid var(--line-strong);border-radius:10px;
  font-size:15px;font-family:inherit;color:var(--ink-900);background:#fff;transition:border-color .2s,box-shadow .2s;
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:0;border-color:var(--blue-500);box-shadow:0 0 0 3px rgba(30,94,255,.13);
}
.field textarea{resize:vertical;min-height:92px;}
.form-tip{margin-top:12px;font-size:12.6px;color:var(--ink-400);line-height:1.7;}
.form-ok{
  display:none;margin-top:14px;padding:13px 16px;border-radius:10px;font-size:14px;
  background:#eafaf0;border:1px solid #b7ebc9;color:#15803d;
}
.form-ok.show{display:block;}

/* ---------------- 双列信息 ---------------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;}
.split.wide-left{grid-template-columns:1.1fr .9fr;}
.info-list{display:grid;gap:12px;margin-top:22px;}
.info-list li{display:flex;gap:11px;font-size:15px;color:var(--ink-700);align-items:flex-start;}
.info-list .ico{width:18px;height:18px;color:var(--blue-600);margin-top:4px;flex:none;}
.info-list b{color:var(--ink-900);}
.plain-list{display:grid;gap:9px;margin-top:16px;}
.plain-list li{display:flex;gap:10px;font-size:14.6px;color:var(--ink-600);align-items:flex-start;}
.plain-list .ico{width:16px;height:16px;color:var(--ok);margin-top:5px;flex:none;}

/* ---------------- 页脚 ---------------- */
.site-footer{background:#0b1736;color:#93a4c4;padding:62px 0 0;margin-top:0;}
.f-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:38px;padding-bottom:44px;}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700;letter-spacing:.04em;}
.site-footer a{color:#93a4c4;}
.site-footer a:hover{color:#fff;}
.f-about p{font-size:14px;line-height:1.85;color:#8b9dbd;margin-top:14px;}
.site-footer .brand-txt strong{color:#fff;}
.site-footer .brand-txt span{color:#7e90b3;}
.f-links{display:grid;gap:11px;font-size:14.2px;}
.f-contact{display:grid;gap:12px;font-size:14px;}
.f-contact li{display:flex;gap:10px;align-items:flex-start;}
.f-contact .ico{width:17px;height:17px;color:var(--cyan-500);margin-top:4px;flex:none;}
.f-fl{
  display:flex;flex-wrap:wrap;align-items:center;gap:9px 15px;padding:20px 0;
  border-top:1px solid rgba(255,255,255,.1);font-size:13.6px;
}
.f-fl .lbl{color:#66799b;letter-spacing:.06em;font-size:13px;}
.f-fl a{color:#7dd3fc;}
.f-fl a:hover{color:#fff;text-decoration:underline;}
.f-fl .sep{color:#334867;}
.f-bottom{
  display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;justify-content:space-between;
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 26px;font-size:13px;color:#7c8bab;
}
.f-bottom a{color:#7c8bab;}
.f-bottom a:hover{color:#fff;}

/* ---------------- 子页头图 ---------------- */
.page-hero{
  padding:60px 0 66px;border-bottom:1px solid var(--line);
  background:radial-gradient(680px 340px at 84% -30%,rgba(0,184,212,.12),transparent 60%),linear-gradient(180deg,#f6faff,#fff);
}
.page-hero h1{font-size:clamp(28px,3.9vw,44px);line-height:1.2;}
.page-hero .lead{margin-top:18px;font-size:17.5px;color:var(--ink-600);max-width:820px;}
.page-hero .crumbs{margin-top:20px;font-size:13.5px;color:var(--ink-400);display:flex;gap:8px;align-items:center;flex-wrap:wrap;}
.page-hero .crumbs a{color:var(--ink-500);}
.page-hero .crumbs a:hover{color:var(--blue-600);}
.page-hero .hero-cta{margin-top:28px;}

/* ---------------- 锚点跳转留白 ---------------- */
.anchor{display:block;position:relative;top:-96px;visibility:hidden;}
.prod-block{padding:56px 0;border-top:1px solid var(--line);}
.prod-block:first-of-type{border-top:0;}
.prod-eq{
  margin-top:18px;padding:16px 18px;border:1px dashed rgba(30,94,255,.3);border-radius:var(--radius-md);
  background:var(--blue-50);font-size:14.4px;color:var(--blue-700);font-weight:600;
}

/* ---------------- 文章 / 资源列表 ---------------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.post{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:24px;display:flex;flex-direction:column;transition:transform .22s,box-shadow .22s;}
.post:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.post .p-cat{font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--cyan-600);margin-bottom:10px;}
.post h3{font-size:16.5px;margin-bottom:8px;}
.post p{font-size:14px;color:var(--ink-600);flex:1;}
.post .p-more{margin-top:14px;font-size:13.5px;font-weight:700;color:var(--blue-600);}

/* ---------------- 滚动动效 ---------------- */
html.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .68s ease,transform .68s ease;}
html.js .reveal.in{opacity:1;transform:none;}
html.js .reveal.instant{transition:none;}
html.js .reveal.in.instant{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){html.js .reveal{opacity:1;transform:none;transition:none;}}

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .feat-grid{grid-template-columns:repeat(3,1fr);}
  .case-grid{grid-template-columns:repeat(2,1fr);}
  .nav-menu,.nav-right .nav-login{display:none;}
  .nav-toggle{display:flex;}
  .split,.demo-wrap,.hero-grid{grid-template-columns:1fr;gap:34px;}
  .stat-row{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .band{padding:66px 0;}
  .scene-grid{grid-template-columns:1fr;}
  .price-grid{grid-template-columns:1fr;}
  .post-grid{grid-template-columns:1fr 1fr;}
  .f-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:640px){
  body{font-size:15.5px;}
  .wrap{padding:0 18px;}
  .hero{padding:48px 0 60px;}
  .hero-lead{font-size:16.5px;}
  .feat-grid,.case-grid,.post-grid{grid-template-columns:1fr;}
  .stat-row{grid-template-columns:1fr 1fr;gap:14px;}
  .stat-num{font-size:28px;}
  .sec-head{margin-bottom:36px;}
  .cta{padding:40px 22px;}
  .form-panel{padding:22px;}
  .f-grid{grid-template-columns:1fr;}
  .f-bottom{justify-content:flex-start;}
}

/* 产品中心 · 四种用法卡内的能力标签：在媒体区内垂直居中，避免大面积留白 */
.scene-media .use-chips{display:flex;align-items:center;justify-content:center;min-height:142px;padding-bottom:22px;}
.scene-media .use-chips .chip-grid{justify-content:center;}