/* ============================================================
   盛景数科官网 · 设计系统 main.css
   蓝白科技美学 × 编辑级排版 × 克制动效（对标并超越 Fable）
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root{
  /* 盛景蓝色阶 */
  --blue-900:#0A3A8C; --blue-800:#0D47A1; --blue-700:#0F52BA; --blue-600:#1565C0;
  --blue-500:#1976D2; --blue-400:#3498EB; --blue-300:#64B5F6; --blue-200:#90CAF9;
  --blue-100:#BBDEFB; --blue-50:#E3F2FD; --blue-25:#F0F7FF;
  /* 冷灰体系 */
  --white:#FFFFFF; --gray-50:#F7FAFC; --gray-100:#EDF2F7; --gray-200:#E2E8F0;
  --gray-300:#CBD5E0; --gray-400:#A0AEC0; --gray-500:#718096; --gray-600:#4A5568;
  --gray-700:#2D3748; --ink:#1A202C;
  /* 功能色 */
  --green:#38A169; --orange:#ED8936; --red:#E53E3E; --info:#3182CE;
  /* 渐变 */
  --grad-main:linear-gradient(135deg,#0F52BA 0%,#3498EB 100%);
  --grad-soft:linear-gradient(135deg,rgba(15,82,186,.05) 0%,rgba(52,152,235,.08) 100%);
  --grad-deep:linear-gradient(135deg,#0A3A8C 0%,#0F52BA 60%,#1565C0 100%);
  /* 阴影（蓝色调柔和阴影） */
  --sh-1:0 4px 12px rgba(15,82,186,.08);
  --sh-2:0 8px 24px rgba(15,82,186,.12);
  --sh-3:0 16px 48px rgba(15,82,186,.16);
  --sh-card-hover:0 12px 24px rgba(15,82,186,.10);
  /* 发际线 */
  --hair:rgba(45,55,72,.14); --hair-blue:rgba(15,82,186,.16);
  /* 字体 */
  --sans:"Inter","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,sans-serif;
  --serif:"Songti SC","STSong","Noto Serif SC","SimSun",serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  /* 动效 */
  --ease:cubic-bezier(.25,.1,.25,1);
  --ease-out:cubic-bezier(.23,1,.32,1);
  --t-fast:200ms; --t-mid:300ms; --t-slow:500ms;
  /* 布局 */
  --maxw:1280px; --readw:720px; --navh:72px; --gutter:40px;
}
@media (max-width:1199px){:root{--gutter:24px}}
@media (max-width:767px){:root{--gutter:16px;--navh:60px}}

/* ---------- Reset & Base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);font-size:16px;line-height:1.7;color:var(--gray-600);
  background:var(--white);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color var(--t-fast) var(--ease)}
ul,ol{list-style:none}
em{font-style:normal}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,select,textarea{font-family:inherit;font-size:16px;color:var(--gray-700)}
::selection{background:rgba(15,82,186,.14)}
h1,h2,h3,h4,h5{color:var(--gray-700);letter-spacing:-.02em;font-weight:600}
strong{color:var(--gray-700);font-weight:600}
:focus-visible{outline:2px solid var(--blue-500);outline-offset:2px;border-radius:2px}

/* ---------- 布局工具 ---------- */
.container{max-width:var(--maxw);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
.container-wide{max-width:1440px;margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
.read{max-width:var(--readw)}
.section{padding-top:120px;padding-bottom:120px}
.section-sm{padding-top:80px;padding-bottom:80px}
@media (max-width:1199px){.section{padding-top:88px;padding-bottom:88px}.section-sm{padding-top:64px;padding-bottom:64px}}
@media (max-width:767px){.section{padding-top:64px;padding-bottom:64px}.section-sm{padding-top:48px;padding-bottom:48px}}
.bg-soft{background:var(--gray-50)}
.bg-blue-soft{background:var(--blue-25)}
.bg-grad-soft{background:var(--grad-soft)}
.bg-grad-deep{background:var(--grad-deep);color:#fff}

/* ---------- 编辑级排版系统 ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;
  letter-spacing:.12em;text-transform:uppercase;color:var(--blue-700);margin-bottom:20px}
.eyebrow::before{content:"";width:24px;height:1.5px;background:var(--blue-400);display:inline-block}
.eyebrow.centered{justify-content:center}
.sec-number{font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--gray-400);
  text-transform:uppercase;display:block;margin-bottom:14px}
.sec-number b{color:var(--blue-600);font-weight:500}
.display{font-size:56px;line-height:1.12;font-weight:700;color:var(--ink);letter-spacing:-.025em}
.h1{font-size:48px;line-height:1.2;font-weight:700;color:var(--ink)}
.h2{font-size:36px;line-height:1.28;font-weight:600;color:var(--gray-700)}
.h3{font-size:28px;line-height:1.35;font-weight:600}
.h4{font-size:22px;line-height:1.4;font-weight:600}
.h5{font-size:18px;line-height:1.5;font-weight:600}
.lead{font-size:20px;line-height:1.75;color:var(--gray-600);font-weight:400}
.body-l{font-size:18px;line-height:1.75}
.body-s{font-size:14px;line-height:1.65;color:var(--gray-500)}
.caption{font-size:12px;line-height:1.55;color:var(--gray-400)}
.accent-blue{color:var(--blue-700)}
.accent-serif{font-family:var(--serif);font-weight:600}
@media (max-width:767px){
  .display{font-size:34px}.h1{font-size:30px}.h2{font-size:26px}.h3{font-size:22px}
  .lead{font-size:17px}
}
.center{text-align:center}
.center .read{margin-left:auto;margin-right:auto}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}
.mt-40{margin-top:40px}.mt-48{margin-top:48px}.mt-64{margin-top:64px}

/* ---------- 发际线分隔体系（替代卡片嵌套） ---------- */
.hr{height:1px;background:var(--hair);border:none}
.col-dividers{display:grid}
@media(min-width:768px){
  .col-dividers.cols-2{grid-template-columns:1fr 1fr}
  .col-dividers.cols-3{grid-template-columns:1fr 1fr 1fr}
  .col-dividers.cols-4{grid-template-columns:repeat(4,1fr)}
  .col-dividers>.cell{position:relative;padding:40px 36px}
  .col-dividers>.cell:not(:first-child)::before{content:"";position:absolute;left:0;top:40px;bottom:40px;
    width:1px;background:var(--hair)}
  .col-dividers>.cell:first-child{padding-left:0}
  .col-dividers>.cell:last-child{padding-right:0}
}
@media(max-width:767px){
  .col-dividers{grid-template-columns:1fr}
  .col-dividers>.cell{padding:32px 0;border-top:1px solid var(--hair)}
  .col-dividers>.cell:first-child{border-top:none;padding-top:0}
}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:48px;
  padding:0 28px;border-radius:8px;font-size:16px;font-weight:600;letter-spacing:.01em;
  transition:all var(--t-fast) var(--ease);white-space:nowrap;position:relative}
.btn:active{transform:scale(.97);transition-duration:100ms}
.btn svg{width:16px;height:16px;transition:transform var(--t-fast) var(--ease)}
.btn-primary{background:var(--grad-main);color:#fff;box-shadow:none}
.btn-primary:hover{box-shadow:0 4px 12px rgba(15,82,186,.24);transform:translateY(-1px);filter:brightness(1.05)}
.btn-secondary{background:#fff;color:var(--blue-700);border:1px solid var(--blue-700)}
.btn-secondary:hover{background:var(--blue-50)}
.btn-white{background:#fff;color:var(--blue-800)}
.btn-white:hover{box-shadow:0 4px 16px rgba(0,0,0,.14);transform:translateY(-1px)}
.btn-outline-w{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.55)}
.btn-outline-w:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-text{background:none;color:var(--blue-700);height:auto;padding:4px 0;font-weight:600}
.btn-text svg{transform:translateX(0)}
.btn-text:hover{color:var(--blue-800)}
.btn-text:hover svg{transform:translateX(3px)}
.btn-disabled{background:var(--gray-100);color:var(--gray-400);cursor:not-allowed}
.btn-disabled:hover{transform:none;box-shadow:none;filter:none}
.btn-lg{height:54px;padding:0 36px;font-size:17px}
.btn-block{width:100%}

/* ---------- 标签 ---------- */
.tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em}
.tag-blue{background:var(--blue-50);color:var(--blue-700)}
.tag-green{background:rgba(56,161,105,.1);color:var(--green)}
.tag-orange{background:rgba(237,137,54,.1);color:var(--orange)}
.tag-gray{background:var(--gray-100);color:var(--gray-500)}
.tag-outline{background:transparent;border:1px solid var(--blue-200);color:var(--blue-600)}

/* ---------- 卡片 ---------- */
.card{background:#fff;border:1px solid var(--gray-200);border-radius:12px;padding:32px;
  transition:transform var(--t-mid) var(--ease),box-shadow var(--t-mid) var(--ease),
    border-color var(--t-mid) var(--ease),background var(--t-mid) var(--ease)}
.card-hover:hover{transform:translateY(-4px);box-shadow:var(--sh-card-hover);
  border-color:var(--blue-200);background:linear-gradient(135deg,#fff 0%,var(--blue-25) 100%)}
.card-hover:active{transform:translateY(-2px)}
.card-flat{padding:0;overflow:hidden}
.card-media{width:100%;aspect-ratio:3/2;object-fit:cover;border-bottom:1px solid var(--gray-100)}

/* ---------- 图标 ---------- */
.ic{width:1em;height:1em;display:inline-block;vertical-align:-.12em;stroke:currentColor;
  fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ic-box{width:48px;height:48px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  color:var(--blue-700);background:var(--blue-50);margin-bottom:20px}
.ic-box svg{width:24px;height:24px}

/* ---------- 浏览器外壳截图 ---------- */
.shot{border-radius:12px;overflow:hidden;box-shadow:var(--sh-2);background:#fff;
  border:1px solid var(--gray-200)}
.shot-bar{height:36px;background:var(--gray-50);border-bottom:1px solid var(--gray-100);
  display:flex;align-items:center;padding:0 14px;gap:6px}
.shot-bar i{width:10px;height:10px;border-radius:50%;background:var(--gray-300);display:block}
.shot-bar i:nth-child(1){background:#F56565}.shot-bar i:nth-child(2){background:#ECC94B}
.shot-bar i:nth-child(3){background:#48BB78}
.shot-bar .url{flex:1;margin-left:10px;height:22px;background:#fff;border:1px solid var(--gray-200);
  border-radius:6px;font-size:11px;color:var(--gray-400);display:flex;align-items:center;padding:0 10px;
  font-family:var(--mono);letter-spacing:.02em}
.shot img{width:100%;display:block}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;height:var(--navh);z-index:9999;
  transition:background var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease)}
.nav-inner{max-width:var(--maxw);margin:0 auto;height:100%;padding:0 var(--gutter);
  display:flex;align-items:center;gap:28px}
.nav.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);
  box-shadow:0 2px 12px rgba(15,82,186,.08)}
.nav-logo{display:flex;align-items:center;flex-shrink:0}
.nav-logo img{height:34px;width:auto}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:8px;flex:1}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--gray-700);
  padding:8px 13px;border-radius:6px;transition:color var(--t-fast) var(--ease)}
.nav-link:hover{color:var(--blue-700)}
.nav-link.active{color:var(--blue-700);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:13px;right:13px;bottom:2px;
  height:2px;background:var(--blue-700);border-radius:2px}
.nav-cta{flex-shrink:0;display:flex;align-items:center;gap:12px}
.nav-cta .btn{height:40px;padding:0 20px;font-size:14.5px}
/* 下拉面板 */
.has-drop{position:relative}
.drop-panel{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(-8px) scale(.98);
  width:660px;background:#fff;border-radius:12px;box-shadow:var(--sh-2);border:1px solid var(--gray-100);
  padding:24px;opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity var(--t-fast) var(--ease),transform var(--t-fast) var(--ease),visibility var(--t-fast)}
.has-drop.open .drop-panel,.has-drop:hover .drop-panel{opacity:1;visibility:visible;pointer-events:auto;
  transform:translateX(-50%) translateY(0) scale(1)}
.drop-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 16px}
.drop-item{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;border-radius:8px;
  transition:background var(--t-fast) var(--ease)}
.drop-item:hover{background:var(--blue-25)}
.drop-item .di-ic{width:34px;height:34px;border-radius:8px;background:var(--blue-50);color:var(--blue-700);
  display:flex;align-items:center;justify-content:center;flex-shrink:0}
.drop-item .di-ic svg{width:17px;height:17px}
.drop-item b{display:block;font-size:14px;color:var(--gray-700);font-weight:600}
.drop-item span{font-size:12px;color:var(--gray-500);line-height:1.5;display:block}
.drop-foot{margin-top:14px;padding-top:14px;border-top:1px solid var(--hair);
  display:flex;justify-content:flex-end}
/* 移动端 */
.nav-burger{display:none;width:44px;height:44px;align-items:center;justify-content:center;color:var(--gray-700)}
.nav-burger svg{width:24px;height:24px}
.m-menu{position:fixed;inset:0;z-index:9998;background:#fff;padding:100px 32px 40px;
  transform:translateX(100%);transition:transform var(--t-mid) var(--ease);overflow-y:auto}
.m-menu.open{transform:translateX(0)}
.m-menu a{display:block;font-size:20px;font-weight:600;color:var(--gray-700);padding:16px 0;
  border-bottom:1px solid var(--hair)}
.m-menu a.active{color:var(--blue-700)}
@media(max-width:1100px){.nav-links{display:none}.nav-burger{display:flex}}
@media(max-width:1100px){.nav-cta .btn{display:none}}

/* ---------- 动效：滚动渐入 ---------- */
.reveal{opacity:0;transform:translateY(32px);transition:opacity var(--t-slow) var(--ease),
  transform var(--t-slow) var(--ease);will-change:transform,opacity}
.reveal.in{opacity:1;transform:translateY(0)}
.reveal-img{opacity:0;transform:translateY(24px) scale(.98);
  transition:opacity 600ms var(--ease),transform 600ms var(--ease);will-change:transform,opacity}
.reveal-img.in{opacity:1;transform:translateY(0) scale(1)}
[data-stagger]>*{opacity:0;transform:translateY(32px);
  transition:opacity var(--t-slow) var(--ease),transform var(--t-slow) var(--ease)}
[data-stagger].in>*{opacity:1;transform:translateY(0)}
[data-stagger].in>*:nth-child(1){transition-delay:0ms}[data-stagger].in>*:nth-child(2){transition-delay:80ms}
[data-stagger].in>*:nth-child(3){transition-delay:160ms}[data-stagger].in>*:nth-child(4){transition-delay:240ms}
[data-stagger].in>*:nth-child(5){transition-delay:320ms}[data-stagger].in>*:nth-child(6){transition-delay:400ms}
[data-stagger].in>*:nth-child(7){transition-delay:480ms}[data-stagger].in>*:nth-child(8){transition-delay:560ms}

/* 页面入场 */
@keyframes pageIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.page-enter{animation:pageIn 400ms var(--ease) both}
.page-fade-out{opacity:0;transition:opacity 150ms var(--ease)}

/* 视差（≤10px，几乎察觉不到） */
.parallax{will-change:transform}

/* Hero 呼吸浮动 */
@keyframes breathe{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.breathe{animation:breathe 6s var(--ease) infinite}

/* 时间线绘制 */
.tl-line{stroke-dasharray:1;stroke-dashoffset:1;transition:stroke-dashoffset 1200ms var(--ease)}
.tl-line.in{stroke-dashoffset:0}

/* 数字滚动 */
.stat-num{font-variant-numeric:tabular-nums;font-family:var(--sans);font-weight:700;letter-spacing:-.03em}

/* ---------- 表单 ---------- */
.field{margin-bottom:20px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--gray-700);margin-bottom:8px}
.input,.select,.textarea{width:100%;height:46px;border:1px solid var(--gray-200);border-radius:8px;
  padding:0 16px;background:#fff;transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease)}
.textarea{min-height:120px;padding:12px 16px;resize:vertical}
.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--blue-700);
  box-shadow:0 0 0 3px rgba(15,82,186,.1)}
.input::placeholder,.textarea::placeholder{color:var(--gray-300)}
.form-ok{display:none;padding:20px;border-radius:8px;background:rgba(56,161,105,.08);
  color:var(--green);font-weight:600;text-align:center}
.form-ok.show{display:block}

/* ---------- Tabs ---------- */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--hair);flex-wrap:wrap}
.tab{font-size:16px;font-weight:500;color:var(--gray-500);padding:12px 18px;position:relative;
  transition:color var(--t-fast) var(--ease)}
.tab::after{content:"";position:absolute;left:18px;right:18px;bottom:-1px;height:2px;
  background:var(--blue-700);transform:scaleX(0);transform-origin:left;transition:transform 250ms var(--ease)}
.tab:hover{color:var(--blue-700)}
.tab.active{color:var(--blue-700);font-weight:600}
.tab.active::after{transform:scaleX(1)}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:tabIn 250ms var(--ease)}
@keyframes tabIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* ---------- Accordion ---------- */
.acc{border-top:1px solid var(--hair)}
.acc-item{border-bottom:1px solid var(--hair)}
.acc-head{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--gray-700);text-align:left;
  transition:color var(--t-fast) var(--ease)}
.acc-head:hover{color:var(--blue-700)}
.acc-head .acc-ic{flex-shrink:0;width:20px;height:20px;color:var(--gray-400);transition:transform var(--t-mid) var(--ease)}
.acc-item.open .acc-ic{transform:rotate(45deg);color:var(--blue-700)}
.acc-body{max-height:0;overflow:hidden;transition:max-height var(--t-mid) var(--ease)}
.acc-body-in{padding:0 4px 24px;color:var(--gray-600);font-size:15.5px;line-height:1.75}

/* ---------- CTA 区块（全站签名式深蓝收尾） ---------- */
.cta-band{background:var(--grad-deep);border-radius:0;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;right:-120px;top:-120px;width:480px;height:480px;
  border:1px solid rgba(255,255,255,.09);border-radius:50%}
.cta-band::after{content:"";position:absolute;right:60px;bottom:-200px;width:420px;height:420px;
  border:1px solid rgba(255,255,255,.07);border-radius:50%}
.cta-band .container{position:relative;z-index:2;display:flex;align-items:center;
  justify-content:space-between;gap:48px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:36px;letter-spacing:-.02em}
.cta-band p{color:rgba(255,255,255,.78);font-size:17px;margin-top:12px;max-width:560px}
@media(max-width:900px){.cta-band .container{flex-direction:column;align-items:flex-start}}

/* ---------- 页脚 ---------- */
.footer{background:var(--gray-50);border-top:1px solid var(--hair);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px}
.footer h6{font-size:14px;font-weight:600;color:var(--gray-700);margin-bottom:18px;letter-spacing:.02em}
.footer-brand img{height:36px;margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--gray-500);line-height:1.8;max-width:300px}
.footer-list li{margin-bottom:12px}
.footer-list a{font-size:14.5px;color:var(--gray-500);transition:color var(--t-fast) var(--ease)}
.footer-list a:hover{color:var(--blue-700)}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--gray-500);margin-bottom:14px;align-items:flex-start}
.footer-contact .ic{color:var(--blue-500);flex-shrink:0;margin-top:4px}
.footer-bottom{margin-top:56px;border-top:1px solid var(--gray-200);padding:24px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--gray-400)}
.footer-bottom a{color:var(--gray-400)}
.footer-bottom a:hover{color:var(--blue-700)}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:36px}}
@media(max-width:560px){.footer-grid{grid-template-columns:1fr}}

/* ---------- 面包屑 ---------- */
.crumbs{font-size:14px;color:var(--gray-400);display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.crumbs a{color:var(--gray-500)}
.crumbs a:hover{color:var(--blue-700)}
.crumbs .sep{color:var(--gray-300)}
.crumbs .cur{color:var(--gray-700);font-weight:500}

/* ---------- 搜索覆盖层 ---------- */
.search-ov{position:fixed;inset:0;z-index:10000;background:rgba(255,255,255,.97);backdrop-filter:blur(8px);
  opacity:0;visibility:hidden;transition:opacity var(--t-fast) var(--ease),visibility var(--t-fast)}
.search-ov.open{opacity:1;visibility:visible}
.search-box{max-width:720px;margin:14vh auto 0;padding:0 24px}
.search-input{width:100%;height:64px;font-size:22px;border:none;border-bottom:2px solid var(--blue-700);
  background:transparent;padding:0 8px;color:var(--gray-700)}
.search-input:focus{outline:none}
.search-hint{font-size:13px;color:var(--gray-400);margin-top:12px}
.search-close{position:absolute;top:24px;right:32px;width:44px;height:44px;color:var(--gray-500)}

/* ---------- 外链确认弹窗 ---------- */
.modal-ov{position:fixed;inset:0;z-index:10001;background:rgba(26,32,44,.4);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;
  transition:opacity var(--t-fast) var(--ease),visibility var(--t-fast)}
.modal-ov.open{opacity:1;visibility:visible}
.modal{background:#fff;border-radius:12px;box-shadow:var(--sh-3);padding:36px;max-width:440px;width:calc(100% - 48px);
  transform:scale(.97);transition:transform var(--t-fast) var(--ease)}
.modal-ov.open .modal{transform:scale(1)}
.modal h4{font-size:19px;margin-bottom:10px}
.modal p{font-size:15px;color:var(--gray-500);margin-bottom:24px}
.modal-acts{display:flex;gap:12px;justify-content:flex-end}

/* ---------- 悬浮咨询按钮 ---------- */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:9000;width:52px;height:52px;border-radius:50%;
  background:var(--grad-main);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity var(--t-mid) var(--ease),transform var(--t-mid) var(--ease)}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{transform:translateY(-2px);box-shadow:var(--sh-3)}
.float-cta svg{width:22px;height:22px}

/* ---------- 打印/降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal-img,[data-stagger]>*{opacity:1!important;transform:none!important}
  html{scroll-behavior:auto}
}

/* ---------- 通用工具 ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.grid-2-tight{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
/* 不对称分栏（打破网格，赋予呼吸感） */
.split-57{display:grid;grid-template-columns:5fr 7fr;gap:72px;align-items:center}
.split-75{display:grid;grid-template-columns:7fr 5fr;gap:72px;align-items:center}
.split-46{display:grid;grid-template-columns:4fr 6fr;gap:72px;align-items:center}
.split-64{display:grid;grid-template-columns:6fr 4fr;gap:72px;align-items:center}
.offset-up{margin-top:-48px}
@media(max-width:900px){
  .grid-2,.grid-2-tight,.split-57,.split-75,.split-46,.split-64{grid-template-columns:1fr;gap:40px}
  .grid-3{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .offset-up{margin-top:0}
  .m-reverse>*:first-child{order:2}
}
@media(max-width:560px){.grid-4{grid-template-columns:1fr}}
.hide-m{display:block}
@media(max-width:767px){.hide-m{display:none}}
.only-m{display:none}
@media(max-width:767px){.only-m{display:block}}

/* ---------- 搜索结果项（main.js 注入） ---------- */
.search-hit{display:flex;flex-direction:column;gap:4px;padding:16px 20px;border-radius:12px;
  text-decoration:none;transition:background 200ms var(--ease)}
.search-hit:hover{background:rgba(15,82,186,.06)}
.search-hit span{font-size:17px;font-weight:600;color:var(--gray-900,#1a2333)}
.search-hit em{font-style:normal;font-size:13px;color:var(--gray-500,#8a94a6)}

/* ---------- 外链确认弹窗内部元素 ---------- */
.modal-url{display:block;margin:12px 0 4px;padding:10px 14px;border-radius:8px;
  background:var(--blue-50,#E3F2FD);color:var(--blue-900,#0A3A8C);
  font-family:var(--mono,monospace);font-size:13px;word-break:break-all}
.modal-confirm{margin-right:10px}

/* ---------- 深色 Hero 页面的常白导航（.nav-solid） ---------- */
.nav.nav-solid{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);
  box-shadow:0 2px 12px rgba(15,82,186,.08)}