/* ============================================================
   荣信微安官网设计系统  v1.0
   深空科技蓝 × 公共卫生绿
   ============================================================ */

*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}

:root{
  /* —— 品牌主色：深度科技蓝 —— */
  --navy-950:#040b18;
  --navy-900:#071426;
  --navy-850:#0a1c33;
  --navy-800:#0d2540;
  --navy-700:#12365c;
  --navy-600:#1b4c7e;

  /* —— 品牌辅色：公共卫生青绿 —— */
  --teal-400:#2dd4bf;
  --teal-500:#14b8a6;
  --teal-600:#0d9488;
  --teal-700:#0f766e;

  /* —— 强调色 —— */
  --cyan-400:#22d3ee;
  --cyan-500:#06b6d4;
  --violet-400:#818cf8;
  --amber-400:#fbbf24;
  --rose-400:#fb7185;

  /* —— 语义色 —— */
  --ink:#0b1a2b;
  --ink-2:#1f3550;
  --ink-3:#47617f;
  --ink-4:#7b91a9;
  --line:#e2e9f1;
  --line-soft:#eef3f8;
  --paper:#ffffff;
  --paper-2:#f6f9fc;
  --paper-3:#eef4f9;

  /* —— 渐变 —— */
  --grad-brand:linear-gradient(135deg,#0d9488 0%,#0ea5e9 55%,#4f46e5 100%);
  --grad-hero:linear-gradient(165deg,#040b18 0%,#071b2f 38%,#0a2a3f 68%,#06231f 100%);
  --grad-text:linear-gradient(100deg,#2dd4bf 0%,#22d3ee 45%,#818cf8 100%);
  --grad-band:linear-gradient(135deg,#071426 0%,#0b2b3d 50%,#0a2f2a 100%);

  /* —— 阴影 / 光晕 —— */
  --sh-xs:0 1px 2px rgba(11,26,43,.06);
  --sh-sm:0 2px 8px rgba(11,26,43,.06),0 1px 2px rgba(11,26,43,.04);
  --sh-md:0 8px 28px rgba(11,26,43,.08),0 2px 6px rgba(11,26,43,.04);
  --sh-lg:0 20px 56px rgba(11,26,43,.11),0 4px 12px rgba(11,26,43,.05);
  --sh-xl:0 34px 88px rgba(11,26,43,.16);
  --glow-teal:0 0 0 1px rgba(45,212,191,.22),0 12px 44px rgba(20,184,166,.22);
  --ring:0 0 0 3px rgba(20,184,166,.38);

  /* —— 圆角 —— */
  --r-xs:6px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:28px;
  --r-full:999px;

  /* —— 节奏 —— */
  --container:1200px;
  --container-wide:1340px;
  --gutter:clamp(20px,4vw,40px);
  --sec-y:clamp(72px,9vw,132px);

  /* —— 字体 —— */
  --font-sans:"Inter","SF Pro Text",-apple-system,BlinkMacSystemFont,"Segoe UI Variable","Segoe UI",system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei UI","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-mono:"SF Mono","JetBrains Mono","Cascadia Mono",Consolas,"Liberation Mono",monospace;

  /* —— 动效 —— */
  --ease-out:cubic-bezier(.22,1,.36,1);
  --ease-in-out:cubic-bezier(.65,0,.35,1);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);

  --nav-h:70px;
}

html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--nav-h) + 20px);
  -webkit-text-size-adjust:100%;
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}

body{
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.75;              /* 中文正文行高：汉字占满字身框，行高是唯一留白 */
  font-size:16px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  font-feature-settings:"kern" 1,"liga" 1,"tnum" 1;
  font-synthesis:none;           /* 禁止伪粗体 —— 对中文是强制项 */
  font-optical-sizing:auto;
  text-wrap:pretty;
}

img,svg,video{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
ul,ol{list-style:none}
table{border-collapse:collapse;width:100%}

::selection{background:rgba(20,184,166,.22);color:var(--navy-900)}

/* 焦点可见性（无障碍） */
:focus-visible{outline:2px solid var(--teal-500);outline-offset:3px;border-radius:4px}

/* ============================================================
   排版
   中文排版要点：
   · letter-spacing 归零 —— 汉字没有可供消耗的侧边距，负字距会切变字格
     （30 字行上 -0.02em/16px 累计漂移约 9.6px），并使密笔画粘连、全角标点偏斜。
     字距收紧只用于纯拉丁文本（.latin-tight）。
   · 行高按中文修正：display 1.10 / h1 1.14 / h2 1.22 / h3 1.32 / h4 1.42
   · 段落间距用 margin 而非首行缩进；正文测度控制在每行 30–40 个汉字。
   · 中文不使用 font-style: italic（机械倾斜会扭曲笔画）。
   ============================================================ */
h1,h2,h3,h4,h5{line-height:1.22;font-weight:800;letter-spacing:0;color:var(--ink);text-wrap:balance}
h1{font-size:clamp(32px,4.6vw,58px);line-height:1.14}
h2{font-size:clamp(26px,3.2vw,42px);line-height:1.22}
h3{font-size:clamp(19px,1.7vw,25px);line-height:1.32}
h4{font-size:clamp(16px,1.25vw,19px);font-weight:700;line-height:1.42}
h5{font-size:15px;font-weight:700;line-height:1.42}

/* 纯拉丁文本可使用负字距（如英文副标题、代码片段） */
.latin-tight{letter-spacing:-.02em}

.lead{font-size:clamp(16px,1.35vw,19px);color:var(--ink-3);line-height:1.8}
.muted{color:var(--ink-3)}
.small{font-size:13.5px;line-height:1.65}
.tiny{font-size:12.5px;line-height:1.65}
.strong{font-weight:700;color:var(--ink)}
.center{text-align:center}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}

.grad-text{
  background:var(--grad-text);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* Windows 高对比模式：渐变会被强制移除，而 -webkit-text-fill-color:transparent 仍在，
   会导致标题彻底不可见。必须显式回退为纯色。 */
@media (forced-colors:active){
  .grad-text{
    background:none!important;
    -webkit-text-fill-color:CanvasText!important;
    color:CanvasText!important;
  }
  .hero h1 .grad-text,.section--dark .grad-text{color:CanvasText!important;-webkit-text-fill-color:CanvasText!important}
  .stat__n,.hero__metric-num{
    background:none!important;-webkit-text-fill-color:CanvasText!important;color:CanvasText!important;
  }
  .pcard__ver,.lightbox,.marquee__item{border:1px solid CanvasText}
}
/* 降低透明度偏好：去掉毛玻璃，改为不透明底，保证可读性 */
@media (prefers-reduced-transparency:reduce){
  .nav.is-stuck{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none}
  .hero__float,.hero__tag,.btn--ghost{backdrop-filter:none;-webkit-backdrop-filter:none}
  .hero__float{background:rgba(9,26,43,.96)}
  .btn--ghost{background:rgba(255,255,255,.12)}
}

/* ============================================================
   布局容器
   ============================================================ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding-inline:var(--gutter)}
.container-wide{width:100%;max-width:var(--container-wide);margin:0 auto;padding-inline:var(--gutter)}
.section{padding-block:var(--sec-y);position:relative}
.section--tight{padding-block:clamp(52px,6vw,80px)}
.section--paper2{background:var(--paper-2)}
.section--paper3{background:var(--paper-3)}
.section--dark{background:var(--navy-900);color:#e8f1f8}
.section--dark h2,.section--dark h3,.section--dark h4{color:#fff}

.sec-head{max-width:760px;margin:0 auto clamp(40px,4.6vw,68px);text-align:center}
.sec-head--left{margin-inline:0;text-align:left}
.sec-head h2{margin-bottom:16px}
.sec-head p{font-size:clamp(15px,1.25vw,17.5px);color:var(--ink-3);line-height:1.85}
.section--dark .sec-head p{color:rgba(214,232,244,.76)}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--teal-700);background:rgba(20,184,166,.09);
  border:1px solid rgba(20,184,166,.2);
  padding:6px 14px;border-radius:var(--r-full);margin-bottom:18px;
}
.section--dark .eyebrow{color:var(--teal-400);background:rgba(45,212,191,.1);border-color:rgba(45,212,191,.22)}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}

/* ============================================================
   按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:var(--r-full);
  font-size:15px;font-weight:650;letter-spacing:.01em;white-space:nowrap;
  transition:transform .28s var(--ease-out),box-shadow .28s var(--ease-out),background .28s,border-color .28s,color .28s;
  position:relative;isolation:isolate;
}
.btn svg{flex:none}
.btn--primary{
  background:var(--grad-brand);color:#fff;
  box-shadow:0 8px 24px rgba(13,148,136,.3);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(13,148,136,.4)}
.btn--ghost{
  background:rgba(255,255,255,.06);color:#fff;
  border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.btn--ghost:hover{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.36);transform:translateY(-2px)}
.btn--outline{
  background:#fff;color:var(--ink);border:1px solid var(--line);
  box-shadow:var(--sh-xs);
}
.btn--outline:hover{border-color:var(--teal-500);color:var(--teal-700);transform:translateY(-2px);box-shadow:var(--sh-md)}
.btn--lg{padding:16px 34px;font-size:16.5px}
.btn--sm{padding:9px 18px;font-size:13.5px}
.btn--block{width:100%}

/* 文本链接带箭头 */
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:650;
  color:var(--teal-700);transition:gap .25s var(--ease-out),color .2s;
}
.link-arrow:hover{gap:11px;color:var(--teal-600)}
.link-arrow::after{content:'→';font-size:15px;line-height:1}

/* ============================================================
   顶部导航
   ============================================================ */
.nav{
  position:fixed;inset:0 0 auto;z-index:1000;
  transition:background .4s var(--ease-out),box-shadow .4s,backdrop-filter .4s,border-color .4s;
  border-bottom:1px solid transparent;
}
.nav__inner{
  height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.nav--top{background:transparent}
.nav--top .nav__brand-name,.nav--top .nav__links a{color:rgba(255,255,255,.92)}
.nav--top .nav__links a:hover{color:#fff}
.nav--top .nav__toggle span{background:#fff}
.nav.is-stuck{
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  box-shadow:0 1px 0 rgba(11,26,43,.07),0 8px 28px rgba(11,26,43,.06);
  border-bottom-color:rgba(11,26,43,.05);
}

.nav__brand{display:flex;align-items:center;gap:11px;flex:none}

/* 官方圆形标识 */
.nav__logo-mark{
  width:38px;height:38px;flex:none;object-fit:contain;
  filter:drop-shadow(0 3px 10px rgba(0,0,0,.28));
  transition:filter .3s var(--ease-out);
}
.nav.is-stuck .nav__logo-mark{filter:none}

.nav__brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.nav__brand-name{
  font-size:17px;font-weight:800;letter-spacing:.2px;transition:color .3s;
  white-space:nowrap;
}
/* 公司全称：默认深色（用于白底页头）；
   当页头透明覆盖在深色英雄区之上时（.nav--top），与品牌名一并改为白色。
   两种状态分别显式取色，避免在任一背景上不可见。 */
.nav__brand-full{
  font-size:10.5px;font-weight:600;letter-spacing:.02em;
  margin-top:2px;white-space:nowrap;transition:color .3s;
  color:var(--ink-4);
}
.nav--top .nav__brand-full{color:rgba(214,235,247,.84)}
@media (max-width:520px){ .nav__brand-full{display:none} }
.nav__brand-sub{font-size:10.5px;font-weight:600;letter-spacing:.13em;color:var(--teal-600);text-transform:uppercase}
.nav--top .nav__brand-sub{color:var(--teal-400)}

.nav__links{display:flex;align-items:center;gap:4px}
.nav__links > li{position:relative}
.nav__links a{
  display:block;padding:9px 14px;border-radius:var(--r-sm);
  font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:color .22s,background .22s;
}
.nav--top .nav__links a:hover{background:rgba(255,255,255,.1)}
.nav.is-stuck .nav__links a:hover{color:var(--teal-700);background:rgba(20,184,166,.08)}
.nav__links a[aria-current="page"]{color:var(--teal-600)}
.nav--top .nav__links a[aria-current="page"]{color:#fff}
.nav__links a[aria-current="page"]::after{
  content:'';position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  background:var(--teal-400);border-radius:2px;
}
.nav__links a{position:relative}

/* 下拉子菜单 */
.nav__drop{
  position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(-8px);
  min-width:290px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-xl);padding:10px;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .26s var(--ease-out),transform .26s var(--ease-out),visibility .26s;
}
.nav__drop::before{content:'';position:absolute;top:-10px;left:0;right:0;height:10px}
.nav__item:hover .nav__drop,.nav__item:focus-within .nav__drop{
  opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0);
}
.nav__drop a{
  display:flex;gap:11px;align-items:flex-start;padding:10px 12px;border-radius:var(--r-sm);
  color:var(--ink-2)!important;
}
.nav__drop a:hover{background:var(--paper-2);color:var(--teal-700)!important}
.nav__drop a[aria-current="page"]::after{display:none}
.nav__drop-ico{
  width:32px;height:32px;border-radius:9px;flex:none;display:grid;place-items:center;
  background:rgba(20,184,166,.1);color:var(--teal-700);font-size:15px;
}
.nav__drop-t{font-size:14px;font-weight:650;line-height:1.35}
.nav__drop-d{font-size:11.5px;color:var(--ink-4);font-weight:500;line-height:1.4;margin-top:1px}

.nav__cta{display:flex;align-items:center;gap:10px;flex:none}
.nav__phone{
  display:flex;align-items:center;gap:7px;font-size:14px;font-weight:700;
  color:var(--ink-2);padding:8px 12px;border-radius:var(--r-full);
  transition:color .2s,background .2s;
}
.nav--top .nav__phone{color:rgba(255,255,255,.92)}
.nav__phone:hover{color:var(--teal-600)}
.nav--top .nav__phone:hover{color:#fff;background:rgba(255,255,255,.1)}

.nav__toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-sm);place-items:center;
  flex-direction:column;gap:5px;
}
.nav__toggle span{width:20px;height:2px;border-radius:2px;background:var(--ink);transition:transform .3s var(--ease-out),opacity .2s}
.nav.is-stuck .nav__toggle span{background:var(--ink)}
.nav.is-open .nav__toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav.is-open .nav__toggle span:nth-child(2){opacity:0}
.nav.is-open .nav__toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media (max-width:1080px){
  .nav__links{
    position:fixed;inset:var(--nav-h) 0 auto;flex-direction:column;align-items:stretch;gap:2px;
    background:#fff;padding:16px var(--gutter) 28px;
    box-shadow:0 24px 48px rgba(11,26,43,.14);
    max-height:calc(100vh - var(--nav-h));overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-14px);
    transition:opacity .3s var(--ease-out),transform .3s var(--ease-out),visibility .3s;
    border-bottom:1px solid var(--line);
  }
  .nav__links a{color:var(--ink-2)!important;padding:13px 14px;font-size:15.5px}
  .nav__links a[aria-current="page"]{background:rgba(20,184,166,.08);color:var(--teal-700)!important}
  .nav__links a[aria-current="page"]::after{display:none}
  .nav.is-open .nav__links{opacity:1;visibility:visible;transform:translateY(0)}
  .nav__drop{
    position:static;transform:none;opacity:1;visibility:visible;pointer-events:auto;
    box-shadow:none;border:none;padding:0 0 6px 12px;min-width:0;background:transparent;
  }
  .nav__drop a{padding:9px 12px}
  .nav__toggle{display:flex}
  .nav__phone{display:none}
  .nav.is-open,.nav--top.is-open{background:#fff}
  .nav--top.is-open .nav__brand-name{color:var(--ink)}
  .nav--top.is-open .nav__brand-sub{color:var(--teal-600)}
}

/* ============================================================
   英雄区（暗色）
   ============================================================ */
.hero{
  position:relative;overflow:hidden;
  background:var(--grad-hero);
  color:#eaf4fb;
  padding-top:calc(var(--nav-h) + clamp(56px,7vw,104px));
  padding-bottom:clamp(64px,7vw,110px);
  isolation:isolate;
}
.hero__glow{position:absolute;inset:0;pointer-events:none;z-index:-1}
.hero__glow::before{
  content:'';position:absolute;top:-32%;right:-14%;width:min(1000px,88vw);aspect-ratio:1;
  background:radial-gradient(circle,rgba(20,184,166,.3) 0%,rgba(20,184,166,.07) 42%,transparent 70%);
  border-radius:50%;animation:drift 24s ease-in-out infinite alternate;
}
.hero__glow::after{
  content:'';position:absolute;bottom:-40%;left:-16%;width:min(880px,76vw);aspect-ratio:1;
  background:radial-gradient(circle,rgba(99,102,241,.26) 0%,rgba(14,165,233,.08) 45%,transparent 72%);
  border-radius:50%;animation:drift 30s ease-in-out infinite alternate-reverse;
}
@keyframes drift{from{transform:translate3d(0,0,0) scale(1)}to{transform:translate3d(-5%,5%,0) scale(1.13)}}

/* 细网格纹理 */
.hero__grid{
  position:absolute;inset:0;z-index:-1;opacity:.5;
  background-image:linear-gradient(rgba(122,180,214,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(122,180,214,.055) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 80% 62% at 50% 34%,#000 12%,transparent 76%);
  -webkit-mask-image:radial-gradient(ellipse 80% 62% at 50% 34%,#000 12%,transparent 76%);
}

.hero__inner{position:relative;display:grid;grid-template-columns:1.06fr .94fr;gap:clamp(32px,4.4vw,68px);align-items:center}
.hero--center .hero__inner{grid-template-columns:1fr;text-align:center}
.hero--center .hero__copy{margin-inline:auto;max-width:900px}
.hero--center .hero__actions,.hero--center .hero__metrics{justify-content:center}

.hero__badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 16px 7px 10px;border-radius:var(--r-full);
  background:rgba(45,212,191,.1);border:1px solid rgba(45,212,191,.26);
  font-size:13px;font-weight:650;color:#9df0e2;letter-spacing:.02em;margin-bottom:26px;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.hero__badge .pulse{width:7px;height:7px;border-radius:50%;background:#2dd4bf;box-shadow:0 0 0 0 rgba(45,212,191,.6);animation:pulse 2.6s infinite}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(45,212,191,.55)}
  70%{box-shadow:0 0 0 9px rgba(45,212,191,0)}
  100%{box-shadow:0 0 0 0 rgba(45,212,191,0)}
}

.hero h1{color:#fff;margin-bottom:22px;text-wrap:balance}
.hero h1 .grad-text{
  background:linear-gradient(100deg,#2dd4bf 0%,#22d3ee 40%,#a5b4fc 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero__sub{
  font-size:clamp(15.5px,1.35vw,18.5px);color:rgba(206,228,241,.8);
  line-height:1.88;max-width:640px;margin-bottom:34px;
}
.hero--center .hero__sub{margin-inline:auto}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:40px}

.hero__tags{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:38px}
.hero__tag{
  padding:6px 14px;border-radius:var(--r-full);
  background:rgba(255,255,255,.055);border:1px solid rgba(160,205,232,.16);
  font-size:12.5px;font-weight:600;color:rgba(214,235,247,.86);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  transition:border-color .25s,background .25s,transform .25s var(--ease-out);
}
.hero__tag:hover{border-color:rgba(45,212,191,.45);background:rgba(45,212,191,.1);transform:translateY(-2px)}

/* 英雄区数据条 */
.hero__metrics{
  display:flex;flex-wrap:wrap;gap:clamp(22px,3.4vw,54px);
  padding-top:30px;border-top:1px solid rgba(160,205,232,.15);
}
.hero__metric-num{
  font-size:clamp(26px,2.7vw,36px);font-weight:800;line-height:1;
  background:linear-gradient(100deg,#2dd4bf,#22d3ee);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  font-variant-numeric:tabular-nums;letter-spacing:0;
}
.hero__metric-label{font-size:13px;color:rgba(190,216,232,.72);font-weight:550;margin-top:7px}

/* 英雄区视觉：产品界面浮层 */
.hero__visual{position:relative}
.hero__shot{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid rgba(150,200,230,.2);
  box-shadow:0 40px 100px rgba(0,0,0,.5),0 0 0 1px rgba(255,255,255,.04) inset;
  background:var(--navy-850);
}
.hero__shot img{width:100%;aspect-ratio:16/9;object-fit:cover;object-position:top left}
.hero__shot::after{
  content:'';position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:linear-gradient(200deg,rgba(45,212,191,.09) 0%,transparent 42%);
}
.hero__float{
  position:absolute;display:flex;align-items:center;gap:11px;
  background:rgba(9,26,43,.82);border:1px solid rgba(150,200,230,.22);
  border-radius:var(--r-md);padding:12px 16px;
  backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%);
  box-shadow:0 18px 44px rgba(0,0,0,.44);
  animation:floaty 6s ease-in-out infinite;
}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}
.hero__float--a{top:9%;left:-30px}
.hero__float--b{bottom:11%;right:-26px;animation-delay:-3s}
.hero__float-ico{
  width:38px;height:38px;border-radius:10px;flex:none;display:grid;place-items:center;font-size:18px;
  background:rgba(45,212,191,.14);color:#5eead4;
}
.hero__float-k{font-size:10.5px;color:rgba(180,210,228,.66);font-weight:650;letter-spacing:.06em;text-transform:uppercase}
.hero__float-v{font-size:14.5px;font-weight:750;color:#fff;margin-top:1px}

@media (max-width:980px){
  .hero__inner{grid-template-columns:1fr;gap:44px}
  .hero__visual{order:2}
  .hero__float--a{left:8px;top:6%}
  .hero__float--b{right:8px;bottom:6%}
  .hero__metrics{gap:26px 40px}
}
@media (max-width:560px){
  .hero__float{padding:9px 12px;transform:scale(.9)}
  .hero__float--a{left:-6px}
  .hero__float--b{right:-6px}
}

/* 页头（内页） */
.pagehead{
  position:relative;overflow:hidden;
  background:var(--grad-hero);color:#fff;
  padding-top:calc(var(--nav-h) + clamp(48px,5.4vw,80px));
  padding-bottom:clamp(48px,5.4vw,78px);
}
.pagehead__glow{position:absolute;inset:0;z-index:0;pointer-events:none}
.pagehead__glow::before{
  content:'';position:absolute;top:-46%;right:-10%;width:min(760px,72vw);aspect-ratio:1;
  background:radial-gradient(circle,rgba(20,184,166,.26) 0%,transparent 68%);border-radius:50%;
}
.pagehead__glow::after{
  content:'';position:absolute;bottom:-56%;left:-12%;width:min(680px,64vw);aspect-ratio:1;
  background:radial-gradient(circle,rgba(99,102,241,.2) 0%,transparent 70%);border-radius:50%;
}
.pagehead .container{position:relative;z-index:1}
.pagehead h1{color:#fff;margin-bottom:16px;text-wrap:balance;max-width:900px}
.pagehead p{font-size:clamp(15px,1.3vw,17.5px);color:rgba(206,228,241,.78);max-width:780px;line-height:1.85}
.pagehead__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}

/* 面包屑 */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;margin-bottom:20px;color:rgba(190,216,232,.66)}
.crumbs a{color:rgba(206,228,241,.8);transition:color .2s}
.crumbs a:hover{color:#5eead4}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:'/';color:rgba(190,216,232,.4)}

/* ============================================================
   卡片 / 网格
   ============================================================ */
.grid{display:grid;gap:clamp(16px,1.9vw,26px)}
.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--auto-260{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.grid--auto-300{grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
@media (max-width:1000px){.grid--4{grid-template-columns:repeat(2,1fr)}.grid--3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:680px){.grid--2,.grid--3,.grid--4{grid-template-columns:1fr}}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(22px,2.3vw,32px);
  transition:transform .34s var(--ease-out),box-shadow .34s var(--ease-out),border-color .34s;
  position:relative;
}
.card--hover:hover{transform:translateY(-5px);box-shadow:var(--sh-lg);border-color:rgba(20,184,166,.32)}
.card--soft{background:var(--paper-2);border-color:var(--line-soft)}
.card--flush{padding:0;overflow:hidden}

.card__ico{
  width:52px;height:52px;border-radius:15px;display:grid;place-items:center;
  font-size:24px;margin-bottom:20px;flex:none;
  background:linear-gradient(140deg,rgba(20,184,166,.13),rgba(14,165,233,.1));
  border:1px solid rgba(20,184,166,.18);color:var(--teal-700);
}
.card__ico--violet{background:linear-gradient(140deg,rgba(99,102,241,.13),rgba(139,92,246,.09));border-color:rgba(99,102,241,.18);color:#4f46e5}
.card__ico--cyan{background:linear-gradient(140deg,rgba(6,182,212,.13),rgba(14,165,233,.09));border-color:rgba(6,182,212,.18);color:#0e7490}
.card__ico--amber{background:linear-gradient(140deg,rgba(251,191,36,.15),rgba(245,158,11,.09));border-color:rgba(251,191,36,.22);color:#b45309}
.card h3{margin-bottom:11px}
.card > p{color:var(--ink-3);font-size:14.8px;line-height:1.82}

/* 产品卡片 */
.pcard{
  display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;position:relative;
  transition:transform .34s var(--ease-out),box-shadow .34s var(--ease-out),border-color .34s;
}
.pcard:hover{transform:translateY(-6px);box-shadow:var(--sh-lg);border-color:rgba(20,184,166,.34)}
.pcard__shot{
  position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--paper-3);
  border-bottom:1px solid var(--line-soft);
}
.pcard__shot img{
  width:100%;height:100%;object-fit:cover;object-position:top center;
  transition:transform .6s var(--ease-out);
}
.pcard:hover .pcard__shot img{transform:scale(1.045)}
.pcard__ver{
  position:absolute;top:12px;right:12px;
  padding:4px 10px;border-radius:var(--r-full);
  background:rgba(4,11,24,.72);color:#9df0e2;
  font-size:11px;font-weight:700;letter-spacing:.04em;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border:1px solid rgba(45,212,191,.28);
}
.pcard__body{padding:clamp(19px,2vw,26px);display:flex;flex-direction:column;flex:1;gap:11px}
.pcard__cat{font-size:11.5px;font-weight:750;letter-spacing:.09em;text-transform:uppercase;color:var(--teal-600)}
.pcard__body h3{font-size:clamp(17px,1.4vw,20px);line-height:1.32}
.pcard__desc{font-size:14px;color:var(--ink-3);line-height:1.78;flex:1}
.pcard__tags{display:flex;flex-wrap:wrap;gap:6px}
.pcard__foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px solid var(--line-soft);margin-top:2px;
}

/* 标签药丸 */
.pill{
  display:inline-flex;align-items:center;gap:5px;
  padding:4px 11px;border-radius:var(--r-full);
  background:rgba(20,184,166,.075);border:1px solid rgba(20,184,166,.17);
  font-size:11.5px;font-weight:650;color:var(--teal-700);white-space:nowrap;
}
.pill--ink{background:var(--paper-2);border-color:var(--line);color:var(--ink-3)}
.pill--violet{background:rgba(99,102,241,.075);border-color:rgba(99,102,241,.18);color:#4f46e5}
.pill--cyan{background:rgba(6,182,212,.075);border-color:rgba(6,182,212,.18);color:#0e7490}
.pill--amber{background:rgba(251,191,36,.1);border-color:rgba(251,191,36,.24);color:#b45309}
.pill--rose{background:rgba(251,113,133,.09);border-color:rgba(251,113,133,.2);color:#be123c}
.pill--dark{background:rgba(255,255,255,.08);border-color:rgba(160,205,232,.2);color:rgba(214,235,247,.9)}
.pill--lg{padding:6px 14px;font-size:12.5px}

/* ============================================================
   Bento 网格
   ============================================================ */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:clamp(14px,1.6vw,22px)}
.bento__cell{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(22px,2.4vw,34px);position:relative;overflow:hidden;
  transition:transform .34s var(--ease-out),box-shadow .34s var(--ease-out),border-color .34s;
}
.bento__cell:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:rgba(20,184,166,.3)}
.bento__cell h3{margin-bottom:10px}
.bento__cell > p{color:var(--ink-3);font-size:14.6px;line-height:1.8}
.bento__cell--3{grid-column:span 3}
.bento__cell--2{grid-column:span 2}
.bento__cell--4{grid-column:span 4}
.bento__cell--6{grid-column:span 6}
.bento__cell--dark{background:var(--navy-900);border-color:rgba(160,205,232,.14);color:#dceaf4}
.bento__cell--dark h3{color:#fff}
.bento__cell--dark > p{color:rgba(206,228,241,.75)}
.bento__cell--grad{
  background:linear-gradient(140deg,#062e2a 0%,#08303f 52%,#0a1f3a 100%);
  border-color:rgba(45,212,191,.24);color:#dceaf4;
}
.bento__cell--grad h3{color:#fff}
.bento__cell--grad > p{color:rgba(206,228,241,.8)}
@media (max-width:900px){
  .bento{grid-template-columns:repeat(2,1fr)}
  .bento__cell--3,.bento__cell--2,.bento__cell--4,.bento__cell--6{grid-column:span 2}
}
@media (max-width:600px){
  .bento{grid-template-columns:1fr}
  .bento__cell--3,.bento__cell--2,.bento__cell--4,.bento__cell--6{grid-column:span 1}
}

/* ============================================================
   特性列表 / 清单
   ============================================================ */
.flist{display:grid;gap:11px}
.flist li{display:flex;gap:11px;align-items:flex-start;font-size:14.8px;color:var(--ink-2);line-height:1.72}
.flist li::before{
  content:'';flex:none;width:19px;height:19px;margin-top:5px;border-radius:6px;
  background:rgba(20,184,166,.12) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230f766e' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/12px no-repeat;
}
.flist--lg li{font-size:15.6px}
.flist--dark li{color:rgba(214,235,247,.88)}
.flist--dark li::before{
  background-color:rgba(45,212,191,.16);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235eead4' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
}

/* 痛点列表 */
.plist{display:grid;gap:12px}
.plist li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 16px;border-radius:var(--r-md);
  background:var(--paper-2);border:1px solid var(--line-soft);
  font-size:14.5px;color:var(--ink-2);line-height:1.74;
}
.plist li::before{
  content:'';flex:none;width:20px;height:20px;margin-top:4px;border-radius:6px;
  background:rgba(251,113,133,.13) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23be123c' stroke-width='3' stroke-linecap='round'%3E%3Cline x1='18' y1='6' x2='6' y2='18'/%3E%3Cline x1='6' y1='6' x2='18' y2='18'/%3E%3C/svg%3E") center/11px no-repeat;
}

/* 编号步骤 */
.steps{display:grid;gap:clamp(16px,1.9vw,24px);grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.step{position:relative;padding-top:34px}
.step__n{
  position:absolute;top:0;left:0;
  width:30px;height:30px;border-radius:9px;
  display:grid;place-items:center;
  background:var(--grad-brand);color:#fff;
  font-size:13.5px;font-weight:800;
  box-shadow:0 5px 16px rgba(13,148,136,.3);
}
.step h4{margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-3);line-height:1.78}
.steps--dark .step p{color:rgba(206,228,241,.74)}
.steps--dark .step h4{color:#fff}

/* ============================================================
   架构图 / 分层
   ============================================================ */
.layers{display:grid;gap:12px}
.layer{
  display:grid;grid-template-columns:200px 1fr;gap:22px;align-items:center;
  padding:20px 26px;border-radius:var(--r-md);
  background:#fff;border:1px solid var(--line);
  transition:border-color .3s,box-shadow .3s,transform .3s var(--ease-out);
}
.layer:hover{border-color:rgba(20,184,166,.34);box-shadow:var(--sh-md);transform:translateX(3px)}
.layer__k{font-size:15px;font-weight:750;color:var(--navy-800);display:flex;align-items:center;gap:10px}
.layer__k .dot{width:9px;height:9px;border-radius:3px;background:var(--grad-brand);flex:none}
.layer__v{font-size:14px;color:var(--ink-3);line-height:1.7}
@media (max-width:700px){.layer{grid-template-columns:1fr;gap:8px;padding:18px 20px}}

/* ============================================================
   规格表
   ============================================================ */
.spec{border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:#fff}
.spec__row{display:grid;grid-template-columns:220px 1fr;gap:0;border-bottom:1px solid var(--line-soft)}
.spec__row:last-child{border-bottom:none}
.spec__k{
  padding:14px 22px;background:var(--paper-2);
  font-size:13.5px;font-weight:700;color:var(--ink-2);
  border-right:1px solid var(--line-soft);
}
.spec__v{padding:14px 22px;font-size:14px;color:var(--ink-3);line-height:1.7}
@media (max-width:640px){
  .spec__row{grid-template-columns:1fr}
  .spec__k{border-right:none;border-bottom:1px solid var(--line-soft);padding-bottom:8px}
  .spec__v{padding-top:10px}
}

/* ============================================================
   数据统计
   ============================================================ */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:clamp(18px,2.4vw,34px)}
.stat{text-align:center;padding:8px}
.stat__n{
  font-size:clamp(30px,3.4vw,46px);font-weight:800;line-height:1;letter-spacing:0;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(120deg,#0d9488,#0ea5e9);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.stat__l{font-size:14px;color:var(--ink-3);margin-top:11px;font-weight:600}
.section--dark .stat__n{background:linear-gradient(120deg,#2dd4bf,#22d3ee);-webkit-background-clip:text;background-clip:text}
.section--dark .stat__l{color:rgba(206,228,241,.74)}

/* 统计带（暗色） */
.band{background:var(--grad-band);color:#fff;position:relative;overflow:hidden;padding-block:clamp(52px,6vw,82px)}
.band::before{
  content:'';position:absolute;top:-60%;left:50%;transform:translateX(-50%);
  width:min(1100px,100vw);aspect-ratio:2/1;
  background:radial-gradient(ellipse,rgba(20,184,166,.16) 0%,transparent 68%);pointer-events:none;
}
.band .container{position:relative;z-index:1}

/* ============================================================
   客户 / 信任条
   WCAG 2.2.2（Level A）：自动移动的内容必须提供真正的暂停控件，
   仅"悬停暂停"不满足要求，因此这里提供可聚焦的暂停按钮。
   ============================================================ */
.marquee-wrap{position:relative}
.marquee{overflow:hidden;position:relative;mask-image:linear-gradient(90deg,transparent,#000 9%,#000 91%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 9%,#000 91%,transparent)}
.marquee__track{display:flex;gap:14px;width:max-content;animation:slide 42s linear infinite}
.marquee:hover .marquee__track{animation-play-state:paused}
.marquee.is-paused .marquee__track{animation-play-state:paused}
.marquee__item{
  flex:none;padding:13px 24px;border-radius:var(--r-md);
  background:#fff;border:1px solid var(--line);
  font-size:14px;font-weight:650;color:var(--ink-2);white-space:nowrap;
  display:flex;align-items:center;gap:9px;
}
.marquee__item .dot{width:7px;height:7px;border-radius:50%;background:var(--teal-500);flex:none}
.marquee__toggle{
  position:absolute;right:0;top:-46px;
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 15px;border-radius:var(--r-full);
  background:#fff;border:1px solid var(--line);
  font-size:12.5px;font-weight:650;color:var(--ink-3);
  transition:border-color .25s,color .25s,background .25s;
}
.marquee__toggle:hover{border-color:var(--teal-500);color:var(--teal-700)}
.marquee__toggle svg{width:13px;height:13px;flex:none}
@media (prefers-reduced-motion:reduce){
  .marquee__track{animation:none}
}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ============================================================
   截图画廊
   ============================================================ */
.gallery{display:grid;gap:clamp(16px,1.9vw,26px)}
.gallery--2{grid-template-columns:repeat(2,1fr)}
@media (max-width:820px){.gallery--2{grid-template-columns:1fr}}
.shot{
  border-radius:var(--r-lg);overflow:hidden;background:#fff;
  border:1px solid var(--line);transition:transform .34s var(--ease-out),box-shadow .34s var(--ease-out),border-color .34s;
}
.shot:hover{transform:translateY(-5px);box-shadow:var(--sh-lg);border-color:rgba(20,184,166,.3)}
.shot__img{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--paper-3);cursor:zoom-in}
.shot__img img{width:100%;height:100%;object-fit:cover;object-position:top left;transition:transform .6s var(--ease-out)}
.shot:hover .shot__img img{transform:scale(1.035)}
.shot__cap{padding:16px 20px;border-top:1px solid var(--line-soft)}
.shot__cap h4{font-size:15px;margin-bottom:4px}
.shot__cap p{font-size:13px;color:var(--ink-3);line-height:1.65}

/* ============================================================
   功能模块图文块（产品详情页）
   ============================================================ */
.mod-shot{position:relative;overflow:hidden;background:var(--paper-3);min-height:200px}
.mod-shot .shot__img{aspect-ratio:16/10;cursor:zoom-in}
.mod-shot img{width:100%;height:100%;object-fit:cover;object-position:top left;transition:transform .6s var(--ease-out)}
.card:hover .mod-shot img{transform:scale(1.03)}
.mod-body{padding:clamp(22px,2.6vw,38px);display:flex;flex-direction:column;justify-content:center}
.mod-body h3{font-size:clamp(18px,1.6vw,23px)}
@media (max-width:820px){
  .mod-shot{order:1!important}
  .mod-body{order:2!important;padding:20px}
}

/* 灯箱 */
.lightbox{
  position:fixed;inset:0;z-index:2000;display:grid;place-items:center;padding:24px;
  background:rgba(4,11,24,.9);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease-out),visibility .3s;
}
.lightbox.is-open{opacity:1;visibility:visible}
.lightbox img{max-width:min(1400px,96vw);max-height:88vh;width:auto;border-radius:var(--r-md);box-shadow:0 40px 100px rgba(0,0,0,.6)}
.lightbox__x{
  position:absolute;top:22px;right:24px;width:44px;height:44px;border-radius:50%;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#fff;
  display:grid;place-items:center;font-size:20px;transition:background .25s,transform .25s;
}
.lightbox__x:hover{background:rgba(255,255,255,.2);transform:rotate(90deg)}

/* ============================================================
   标签页
   ============================================================ */
.tabs{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:clamp(28px,3.2vw,44px)}
.tab{
  padding:9px 20px;border-radius:var(--r-full);
  background:#fff;border:1px solid var(--line);
  font-size:14px;font-weight:650;color:var(--ink-3);
  transition:all .26s var(--ease-out);
}
.tab:hover{border-color:var(--teal-500);color:var(--teal-700);transform:translateY(-2px)}
.tab.is-active{background:var(--grad-brand);border-color:transparent;color:#fff;box-shadow:0 7px 20px rgba(13,148,136,.28)}

/* ============================================================
   FAQ 手风琴
   ============================================================ */
.faq{display:grid;gap:12px;max-width:920px;margin:0 auto}
.faq__item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:border-color .3s,box-shadow .3s;
}
.faq__item[open]{border-color:rgba(20,184,166,.34);box-shadow:var(--sh-sm)}
.faq__q{
  display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:18px 24px;cursor:pointer;list-style:none;
  font-size:15.5px;font-weight:700;color:var(--ink);line-height:1.6;
  transition:color .22s;
}
.faq__q::-webkit-details-marker{display:none}
.faq__q:hover{color:var(--teal-700)}
.faq__q::after{
  content:'';flex:none;width:22px;height:22px;margin-top:2px;border-radius:7px;
  background:var(--paper-2) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230f766e' stroke-width='3' stroke-linecap='round'%3E%3Cline x1='12' y1='5' x2='12' y2='19'/%3E%3Cline x1='5' y1='12' x2='19' y2='12'/%3E%3C/svg%3E") center/12px no-repeat;
  transition:transform .3s var(--ease-out),background-color .3s;
}
.faq__item[open] .faq__q::after{
  transform:rotate(45deg);background-color:rgba(20,184,166,.12);
}
.faq__a{padding:0 24px 22px;font-size:14.6px;color:var(--ink-3);line-height:1.85;max-width:820px}
.faq__a p+p{margin-top:12px}
.faq__a ul{margin-top:10px;display:grid;gap:8px}
.faq__a ul li{display:flex;gap:10px;font-size:14.2px}
.faq__a ul li::before{content:'—';color:var(--teal-600);flex:none}
.faq--dark .faq__item{background:rgba(255,255,255,.045);border-color:rgba(160,205,232,.16)}
.faq--dark .faq__item[open]{border-color:rgba(45,212,191,.36)}
.faq--dark .faq__q{color:#fff}
.faq--dark .faq__q:hover{color:#5eead4}
.faq--dark .faq__a{color:rgba(206,228,241,.78)}
.faq--dark .faq__q::after{background-color:rgba(255,255,255,.08);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235eead4' stroke-width='3' stroke-linecap='round'%3E%3Cline x1='12' y1='5' x2='12' y2='19'/%3E%3Cline x1='5' y1='12' x2='19' y2='12'/%3E%3C/svg%3E")}

/* ============================================================
   CTA 区块
   ============================================================ */
.cta{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#062e2a 0%,#08303f 48%,#0a1f3a 100%);
  border-radius:var(--r-xl);
  padding:clamp(38px,4.8vw,68px) clamp(26px,4vw,60px);
}
.cta::before{
  content:'';position:absolute;top:-70%;right:-14%;width:min(680px,72vw);aspect-ratio:1;
  background:radial-gradient(circle,rgba(45,212,191,.28) 0%,transparent 66%);border-radius:50%;
}
.cta::after{
  content:'';position:absolute;inset:0;
  background-image:linear-gradient(rgba(122,180,214,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(122,180,214,.05) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(ellipse 70% 90% at 78% 40%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse 70% 90% at 78% 40%,#000,transparent 72%);
}
.cta > *{position:relative;z-index:1}
.cta h2{color:#fff;margin-bottom:16px;text-wrap:balance}
.cta p{color:rgba(206,228,241,.8);font-size:clamp(15px,1.3vw,17px);line-height:1.85;max-width:660px}
.cta__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

/* 联系信息卡（暗色） */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:22px;margin-top:36px}
.contact-item{
  padding:20px 22px;border-radius:var(--r-md);
  background:rgba(255,255,255,.055);border:1px solid rgba(160,205,232,.16);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.contact-item__k{font-size:11.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#5eead4;margin-bottom:9px}
.contact-item__v{font-size:16px;font-weight:700;color:#fff;line-height:1.5;word-break:break-word}
.contact-item__v a{transition:color .22s}
.contact-item__v a:hover{color:#5eead4}

/* ============================================================
   页脚
   ============================================================ */
.foot{background:var(--navy-950);color:rgba(190,216,232,.72);padding-top:clamp(52px,6vw,80px);font-size:14px}
.foot__top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:clamp(26px,3.4vw,52px);padding-bottom:44px;border-bottom:1px solid rgba(160,205,232,.11)}
.foot__brand{display:flex;align-items:center;gap:13px;margin-bottom:18px}
.foot__logo{
  width:auto;height:74px;flex:none;object-fit:contain;
}
.foot__brand-name{font-size:17px;font-weight:800;color:#fff}
.foot__brand-sub{font-size:10.5px;font-weight:600;letter-spacing:.13em;color:var(--teal-400);text-transform:uppercase}
.foot__about{font-size:13.6px;line-height:1.85;color:rgba(180,208,226,.68);max-width:340px}
.foot__contact{margin-top:18px;display:grid;gap:9px;font-size:13.6px}
.foot__addr{line-height:1.7}
.foot__addr br{content:'';display:block}
.foot__contact a{color:#5eead4;font-weight:700;transition:opacity .2s}
.foot__contact a:hover{opacity:.8}
.foot__cta{display:inline-block;margin-top:2px}
.foot__col h5{font-size:13px;font-weight:750;color:#fff;letter-spacing:.06em;text-transform:uppercase;margin-bottom:17px}
.foot__col ul{display:grid;gap:10px}
.foot__col a{font-size:13.6px;color:rgba(180,208,226,.7);transition:color .22s,padding-left .22s}
.foot__col a:hover{color:#5eead4;padding-left:3px}
.foot__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding-block:24px;font-size:12.8px;color:rgba(160,190,212,.6);
}
.foot__legal{display:flex;flex-wrap:wrap;gap:18px;align-items:center}
.foot__legal a{transition:color .2s}
.foot__legal a:hover{color:#5eead4}
/* 备案号：置于页脚底栏，样式略突出，便于查看与点击核验 */
.foot__icp{
  color:rgba(180,208,226,.82)!important;
  font-weight:600;
  padding:2px 9px;
  border:1px solid rgba(160,205,232,.2);
  border-radius:var(--r-full);
  transition:color .2s,border-color .2s,background .2s;
}
.foot__icp:hover{
  color:#5eead4!important;
  border-color:rgba(45,212,191,.45);
  background:rgba(45,212,191,.08);
}
@media (max-width:900px){.foot__top{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.foot__top{grid-template-columns:1fr;gap:30px}.foot__about{max-width:none}}

/* ============================================================
   滚动出现动画
   渐进增强策略：默认内容完全可见（无 JS / 爬虫 / 打印均正常），
   仅当 JS 成功执行并加上 html.js 后，才启用"先隐藏再出现"的效果。
   ============================================================ */
.reveal{opacity:1;transform:none}
html.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .72s var(--ease-out),transform .72s var(--ease-out)}
html.js .reveal.is-in{opacity:1;transform:none}
html.js .reveal[data-delay="1"]{transition-delay:.075s}
html.js .reveal[data-delay="2"]{transition-delay:.15s}
html.js .reveal[data-delay="3"]{transition-delay:.225s}
html.js .reveal[data-delay="4"]{transition-delay:.3s}
html.js .reveal[data-delay="5"]{transition-delay:.375s}
html.js .reveal[data-delay="6"]{transition-delay:.45s}
@media (prefers-reduced-motion:reduce){
  html.js .reveal{opacity:1;transform:none;transition:none}
}
@media print{
  html.js .reveal{opacity:1!important;transform:none!important}
}

/* 回到顶部 */
.totop{
  position:fixed;right:22px;bottom:22px;z-index:900;
  width:46px;height:46px;border-radius:50%;
  background:rgba(7,20,38,.86);color:#fff;border:1px solid rgba(160,205,232,.22);
  display:grid;place-items:center;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  box-shadow:var(--sh-lg);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s var(--ease-out),transform .3s var(--ease-out),visibility .3s,background .25s;
}
.totop.is-on{opacity:1;visibility:visible;transform:none}
.totop:hover{background:var(--teal-600)}

/* 阅读进度条 */
.progress{position:fixed;top:0;left:0;height:2px;z-index:1100;background:var(--grad-brand);width:0;transition:width .1s linear}

/* ============================================================
   工具类
   ============================================================ */
.stack{display:grid;gap:clamp(14px,1.6vw,22px)}
.stack--sm{gap:10px}
.stack--lg{gap:clamp(24px,3vw,44px)}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.row--between{justify-content:space-between}
.row--center{justify-content:center}
.mt-0{margin-top:0}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:34px}.mt-5{margin-top:48px}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:34px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:12px;top:-60px;z-index:1200;background:#fff;color:var(--ink);padding:11px 20px;border-radius:var(--r-sm);font-weight:700;box-shadow:var(--sh-lg);transition:top .25s}
.skip:focus{top:12px}
.aspect-16-9{aspect-ratio:16/9}
.aspect-4-3{aspect-ratio:4/3}
.radius-lg{border-radius:var(--r-lg)}
.bordered{border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:#fff}
.shadow-md{box-shadow:var(--sh-md)}
.shadow-lg{box-shadow:var(--sh-lg)}
.divider{height:1px;background:var(--line);border:none;margin-block:clamp(28px,3.4vw,48px)}
@media print{.nav,.totop,.progress,.foot__bottom{display:none}}