/* ==========================================================================
   SkySec UI — 基于 shadcn/ui 设计令牌（HSL 语义变量），主色替换为科技蓝
   ========================================================================== */
:root{
  --background:0 0% 100%;
  --foreground:224 50% 8%;
  --card:0 0% 100%;
  --card-foreground:224 50% 8%;
  --popover:0 0% 100%;
  --muted:220 40% 97%;
  --muted-foreground:220 12% 40%;
  --secondary:220 45% 96%;
  --secondary-foreground:224 50% 12%;
  --accent:219 100% 96%;
  --accent-foreground:221 100% 40%;
  --border:220 24% 91%;
  --input:220 20% 86%;
  --primary:220 100% 54%;          /* #1664FF 科技蓝 */
  --primary-hover:221 100% 47%;
  --primary-foreground:0 0% 100%;
  --cyan:192 100% 50%;
  --ring:220 100% 54%;
  --destructive:4 74% 57%;
  --success:152 56% 40%;
  --warning:32 90% 50%;
  --navy:226 78% 5%;               /* 深色叙事区 */
  --navy-2:225 60% 9%;
  --radius:.75rem;
  --radius-sm:.5rem; --radius-lg:1rem; --radius-xl:1.5rem;
  --shadow-xs:0 1px 2px hsl(224 50% 8% / .05);
  --shadow-sm:0 1px 2px hsl(224 50% 8% / .05),0 4px 12px hsl(224 50% 8% / .04);
  --shadow-md:0 2px 4px hsl(224 50% 8% / .04),0 12px 32px -8px hsl(224 60% 20% / .12);
  --shadow-lg:0 24px 64px -24px hsl(222 80% 30% / .28);
  --ease-out:cubic-bezier(.22,1,.36,1);
  --ease-in-out:cubic-bezier(.65,0,.35,1);
  --font-sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro SC","PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --font-num:"SF Pro Display",-apple-system,"Inter","Helvetica Neue",Arial,sans-serif;
  --font-mono:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
  --container:1200px;
  --header-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 24px)}
body{margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.6;color:hsl(var(--foreground));background:hsl(var(--background));-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;overflow-x:hidden}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:hsl(var(--primary)/.18)}
:focus-visible{outline:2px solid hsl(var(--ring));outline-offset:2px;border-radius:6px}
.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:fixed;left:16px;top:-48px;z-index:200;background:hsl(var(--primary));color:#fff;padding:8px 14px;border-radius:8px;transition:top .2s}
.skip:focus{top:12px}

/* ---------- layout ---------- */
.container{width:100%;max-width:calc(var(--container) + 64px);margin:0 auto;padding:0 32px}
.container-wide{max-width:1440px}
.container-narrow{max-width:calc(800px + 64px)}
.section{padding:120px 0;position:relative}
.section-sm{padding:80px 0}
.section-muted{background:hsl(var(--muted))}
.stack-8>*+*{margin-top:8px}.stack-16>*+*{margin-top:16px}.stack-24>*+*{margin-top:24px}
.grid{display:grid;gap:24px}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr))}.g-3{grid-template-columns:repeat(3,minmax(0,1fr))}.g-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.row{display:flex;align-items:center;gap:12px}.wrap{flex-wrap:wrap}.between{justify-content:space-between}
.center{text-align:center}.mx-auto{margin-left:auto;margin-right:auto}

/* ---------- typography ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:hsl(var(--primary));letter-spacing:.02em}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:currentColor;box-shadow:0 0 0 4px hsl(var(--primary)/.15)}
.display{font-size:clamp(44px,6.4vw,88px);line-height:1.04;font-weight:700;letter-spacing:-.035em}
.h1{font-size:clamp(36px,4.6vw,64px);line-height:1.08;font-weight:700;letter-spacing:-.03em}
.h2{font-size:clamp(30px,3.6vw,48px);line-height:1.14;font-weight:700;letter-spacing:-.025em}
.h3{font-size:22px;line-height:1.35;font-weight:600;letter-spacing:-.01em}
.h4{font-size:18px;line-height:1.4;font-weight:600}
.lead{font-size:clamp(17px,1.5vw,21px);line-height:1.6;color:hsl(var(--muted-foreground));font-weight:400}
.muted{color:hsl(var(--muted-foreground))}
.small{font-size:14px}.xs{font-size:13px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:-.03em}
.grad-text{background:linear-gradient(100deg,hsl(var(--primary)) 0%,hsl(205 100% 50%) 55%,hsl(var(--cyan)) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.section-head{max-width:760px;margin-bottom:56px}
.section-head.center{margin-left:auto;margin-right:auto}
.section-head .h2{margin-top:12px}
.section-head .lead{margin-top:16px}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:48px}
.section-head-row .section-head{margin-bottom:0}

/* ---------- icon ---------- */
.ico{width:1em;height:1em;flex:none;stroke:currentColor;fill:none}
.ico-box{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:22px;color:hsl(var(--primary));background:hsl(var(--accent));box-shadow:inset 0 0 0 1px hsl(var(--primary)/.12)}
.ico-box.sm{width:36px;height:36px;font-size:18px;border-radius:10px}
.ico-box.lg{width:56px;height:56px;font-size:26px;border-radius:14px}
/* 图标块：提高优先级，避免被 .xxx span{display:block} 之类的通用规则覆盖；图标统一占盒子 50% */
.ico-box.ico-box{display:grid;place-items:center;flex:none;line-height:0;padding:0}
.ico-box>.ico,.ico-box>svg{width:50%;height:50%;display:block}
.ico-box.solid{color:#fff;background:linear-gradient(160deg,hsl(212 100% 62%),hsl(var(--primary)) 55%,hsl(224 100% 42%));box-shadow:inset 0 1px 0 hsl(0 0% 100%/.35),0 8px 20px -8px hsl(var(--primary)/.7)}

/* ---------- button (shadcn: default / secondary / outline / ghost / link) ---------- */
.btn{--h:40px;display:inline-flex;align-items:center;justify-content:center;gap:8px;height:var(--h);padding:0 18px;border-radius:var(--radius-sm);border:1px solid transparent;font-size:15px;font-weight:500;line-height:1;white-space:nowrap;transition:background .2s,color .2s,border-color .2s,box-shadow .2s,transform .2s var(--ease-out);user-select:none;position:relative}
.btn:active{transform:scale(.97)}
.btn .ico{font-size:16px;transition:transform .25s var(--ease-out)}
.btn:hover .ico-arrow{transform:translateX(3px)}
.btn-sm{--h:34px;padding:0 12px;font-size:14px}
.btn-lg{--h:48px;padding:0 24px;font-size:16px;border-radius:10px}
.btn-xl{--h:56px;padding:0 30px;font-size:17px;border-radius:12px}
.btn-primary{background:hsl(var(--primary));color:hsl(var(--primary-foreground));box-shadow:inset 0 1px 0 hsl(0 0% 100%/.18),0 1px 2px hsl(var(--primary)/.4),0 8px 24px -10px hsl(var(--primary)/.8)}
.btn-primary:hover{background:hsl(var(--primary-hover))}
.btn-secondary{background:hsl(var(--secondary));color:hsl(var(--secondary-foreground))}
.btn-secondary:hover{background:hsl(220 40% 92%)}
.btn-outline{background:hsl(var(--background));border-color:hsl(var(--input));color:hsl(var(--foreground))}
.btn-outline:hover{background:hsl(var(--muted));border-color:hsl(220 20% 80%)}
.btn-ghost{background:transparent;color:hsl(var(--foreground))}
.btn-ghost:hover{background:hsl(var(--muted))}
.btn-link{background:none;padding:0;height:auto;color:hsl(var(--primary));font-weight:500}
.btn-link:hover{text-decoration:underline;text-underline-offset:4px}
.btn-white{background:#fff;color:hsl(var(--foreground))}
.btn-white:hover{background:hsl(0 0% 100%/.9)}
.btn-glass{background:hsl(0 0% 100%/.08);color:#fff;border-color:hsl(0 0% 100%/.18);backdrop-filter:blur(12px)}
.btn-glass:hover{background:hsl(0 0% 100%/.14)}
.btn-icon{width:var(--h);padding:0}
.btn[disabled]{opacity:.6;pointer-events:none}

/* ---------- badge ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:999px;font-size:12.5px;font-weight:500;line-height:1;white-space:nowrap;border:1px solid transparent}
.badge-default{background:hsl(var(--primary));color:#fff}
.badge-secondary{background:hsl(var(--secondary));color:hsl(var(--secondary-foreground))}
.badge-outline{border-color:hsl(var(--border));color:hsl(var(--muted-foreground));background:hsl(var(--background))}
.badge-blue{background:hsl(var(--accent));color:hsl(var(--accent-foreground))}
.badge-dark{background:hsl(0 0% 100%/.08);color:hsl(0 0% 100%/.85);border-color:hsl(0 0% 100%/.14)}
.badge-pill{height:32px;padding:0 14px;font-size:13.5px}

/* ---------- card ---------- */
.card{background:hsl(var(--card));border:1px solid hsl(var(--border));border-radius:var(--radius-lg);box-shadow:var(--shadow-xs);position:relative;transition:border-color .25s,box-shadow .35s var(--ease-out),transform .35s var(--ease-out)}
.card-pad{padding:28px}
.card-hover:hover{border-color:hsl(var(--primary)/.35);box-shadow:var(--shadow-md);transform:translateY(-3px)}
.card-title{font-size:18px;font-weight:600;line-height:1.4}
.card-desc{font-size:14.5px;color:hsl(var(--muted-foreground));line-height:1.65}
.card .arrow{position:absolute;right:24px;top:24px;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;color:hsl(var(--muted-foreground));transition:all .3s var(--ease-out)}
.card-hover:hover .arrow{background:hsl(var(--primary));color:#fff;transform:rotate(-45deg)}

/* ---------- separator ---------- */
.sep{height:1px;background:hsl(var(--border));border:0;margin:0}

/* ---------- tabs (shadcn style with sliding indicator) ---------- */
.tabs-list{position:relative;display:inline-flex;align-items:center;gap:4px;padding:4px;border-radius:12px;background:hsl(var(--muted));border:1px solid hsl(var(--border))}
.tabs-trigger{position:relative;z-index:1;height:38px;padding:0 16px;border:0;background:none;border-radius:9px;font-size:14.5px;font-weight:500;color:hsl(var(--muted-foreground));white-space:nowrap;transition:color .25s}
.tabs-trigger:hover{color:hsl(var(--foreground))}
.tabs-trigger[aria-selected=true]{color:hsl(var(--foreground))}
.tabs-ind{position:absolute;z-index:0;top:4px;bottom:4px;left:0;border-radius:9px;background:hsl(var(--background));box-shadow:0 1px 2px hsl(224 50% 8%/.08),0 0 0 1px hsl(var(--border));transition:transform .45s var(--ease-out),width .45s var(--ease-out)}
.tabs-line{display:flex;gap:32px;border-bottom:1px solid hsl(var(--border));position:relative;overflow-x:auto;scrollbar-width:none}
.tabs-line::-webkit-scrollbar{display:none}
.tabs-line .tabs-trigger{padding:0;height:52px;border-radius:0;font-size:16px}
.tabs-line .tabs-trigger[aria-selected=true]{color:hsl(var(--primary))}
.tabs-line .tabs-ind{top:auto;bottom:-1px;height:2px;border-radius:2px;background:hsl(var(--primary));box-shadow:none}
.tab-panel{animation:panelIn .5s var(--ease-out)}
.tab-panel[hidden]{display:none}
@keyframes panelIn{from{opacity:0;transform:translateY(8px);filter:blur(4px)}to{opacity:1;transform:none;filter:none}}

/* ---------- form ---------- */
.field{display:grid;gap:8px}
.label{font-size:14px;font-weight:500}
.label .req{color:hsl(var(--destructive));margin-left:2px}
.input,.textarea{width:100%;height:44px;padding:0 14px;border-radius:var(--radius-sm);border:1px solid hsl(var(--input));background:hsl(var(--background));font:inherit;font-size:15px;color:inherit;transition:border-color .2s,box-shadow .2s}
.textarea{height:112px;padding:12px 14px;resize:none;line-height:1.6}
.input::placeholder,.textarea::placeholder{color:hsl(220 10% 62%)}
.input:focus,.textarea:focus{outline:none;border-color:hsl(var(--ring));box-shadow:0 0 0 3px hsl(var(--ring)/.18)}
.field.invalid .input,.field.invalid .textarea{border-color:hsl(var(--destructive));box-shadow:0 0 0 3px hsl(var(--destructive)/.12)}
.field-msg{font-size:13px;color:hsl(var(--destructive));min-height:0}
.field-count{position:absolute;right:12px;bottom:10px;font-size:12px;color:hsl(var(--muted-foreground))}
.checkbox{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:hsl(var(--muted-foreground))}
.checkbox input{width:16px;height:16px;margin-top:3px;accent-color:hsl(var(--primary))}

/* ---------- dialog ---------- */
.dialog{position:fixed;inset:0;z-index:120;display:grid;place-items:center;padding:24px;visibility:hidden}
.dialog.open{visibility:visible}
.dialog-overlay{position:absolute;inset:0;background:hsl(226 60% 4%/.55);backdrop-filter:blur(6px);opacity:0;transition:opacity .3s}
.dialog.open .dialog-overlay{opacity:1}
.dialog-content{position:relative;width:100%;max-width:920px;max-height:calc(100vh - 48px);overflow:auto;background:hsl(var(--background));border-radius:20px;box-shadow:0 40px 120px -20px hsl(226 80% 10%/.5),0 0 0 1px hsl(var(--border));opacity:0;transform:translateY(16px) scale(.97);transition:opacity .3s,transform .45s var(--ease-out);display:grid;grid-template-columns:340px 1fr}
.dialog.open .dialog-content{opacity:1;transform:none}
.dialog-close{position:absolute;right:14px;top:14px;z-index:3}
.dialog-aside{position:relative;overflow:hidden;padding:40px 32px;color:#fff;background:radial-gradient(120% 70% at 0% 0%,hsl(205 100% 55%/.55),transparent 60%),linear-gradient(165deg,hsl(222 100% 46%),hsl(226 80% 12%));display:flex;flex-direction:column}
.dialog-aside::after{content:"";position:absolute;inset:0;background-image:linear-gradient(hsl(0 0% 100%/.06) 1px,transparent 1px),linear-gradient(90deg,hsl(0 0% 100%/.06) 1px,transparent 1px);background-size:28px 28px;mask-image:linear-gradient(180deg,#000,transparent 80%)}
.dialog-aside>*{position:relative;z-index:1}
.dialog-aside h3{font-size:26px;line-height:1.3;font-weight:700;margin-top:20px}
.dialog-aside p{font-size:14.5px;opacity:.78;margin-top:10px}
.dialog-aside ul{margin-top:28px;display:grid;gap:14px;font-size:14.5px}
.dialog-aside li{display:flex;gap:10px;align-items:center}
.dialog-aside li .ico{color:hsl(var(--cyan))}
.dialog-aside .d-hot{margin-top:auto;padding-top:28px;border-top:1px solid hsl(0 0% 100%/.14)}
.dialog-aside .d-hot b{display:block;font-family:var(--font-num);font-size:26px;letter-spacing:-.01em;margin-top:4px}
.dialog-main{padding:40px 40px 32px}
.dialog-main h2{font-size:24px;font-weight:700;letter-spacing:-.01em}
.dialog-main .sub{font-size:14.5px;color:hsl(var(--muted-foreground));margin-top:6px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:28px}
.form-grid .full{grid-column:1/-1}
.form-foot{margin-top:22px;display:grid;gap:14px}
.form-note{font-size:13px;color:hsl(var(--muted-foreground));line-height:1.6}
.form-success{display:none;text-align:center;padding:48px 8px}
.dialog.done .form-body{display:none}.dialog.done .form-success{display:block}
.success-ring{width:84px;height:84px;margin:0 auto 24px;border-radius:50%;display:grid;place-items:center;background:hsl(var(--success)/.1);color:hsl(var(--success));font-size:40px}
.success-ring .ico{stroke-dasharray:30;stroke-dashoffset:30}
.dialog.done .success-ring .ico{animation:draw .7s .2s var(--ease-out) forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.spinner{width:16px;height:16px;border-radius:50%;border:2px solid hsl(0 0% 100%/.4);border-top-color:#fff;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- toast (sonner style) ---------- */
.toaster{position:fixed;z-index:140;bottom:24px;left:50%;transform:translateX(-50%);display:grid;gap:8px;pointer-events:none}
.toast{pointer-events:auto;display:flex;gap:10px;align-items:center;min-width:320px;padding:14px 16px;border-radius:12px;background:hsl(var(--background));border:1px solid hsl(var(--border));box-shadow:var(--shadow-lg);font-size:14.5px;animation:toastIn .45s var(--ease-out)}
.toast .ico{font-size:18px;color:hsl(var(--success))}
.toast.out{animation:toastOut .3s ease forwards}
@keyframes toastIn{from{opacity:0;transform:translateY(16px) scale(.96)}}
@keyframes toastOut{to{opacity:0;transform:translateY(8px) scale(.97)}}

/* ---------- command palette (⌘K) ---------- */
.cmdk{position:fixed;inset:0;z-index:130;display:flex;justify-content:center;align-items:flex-start;padding:12vh 24px 24px;visibility:hidden}
.cmdk.open{visibility:visible}
.cmdk .dialog-overlay{background:hsl(226 60% 4%/.4)}
.cmdk.open .dialog-overlay{opacity:1}
.cmdk-panel{position:relative;width:100%;max-width:640px;background:hsl(var(--background));border-radius:16px;box-shadow:0 30px 100px -20px hsl(226 80% 10%/.45),0 0 0 1px hsl(var(--border));overflow:hidden;opacity:0;transform:scale(.97);transition:opacity .2s,transform .3s var(--ease-out)}
.cmdk.open .cmdk-panel{opacity:1;transform:none}
.cmdk-input{display:flex;align-items:center;gap:12px;padding:0 18px;height:58px;border-bottom:1px solid hsl(var(--border));font-size:20px;color:hsl(var(--muted-foreground))}
.cmdk-input input{flex:1;border:0;outline:0;font:inherit;font-size:16px;color:hsl(var(--foreground));background:none}
.cmdk-list{max-height:min(420px,56vh);overflow:auto;padding:8px}
.cmdk-group{font-size:12px;font-weight:600;color:hsl(var(--muted-foreground));padding:10px 10px 6px}
.cmdk-item{display:flex;align-items:center;gap:12px;padding:10px;border-radius:10px;font-size:14.5px;cursor:pointer}
.cmdk-item .ico{font-size:18px;color:hsl(var(--muted-foreground))}
.cmdk-item small{margin-left:auto;font-size:12.5px;color:hsl(var(--muted-foreground))}
.cmdk-item[aria-selected=true]{background:hsl(var(--accent));color:hsl(var(--accent-foreground))}
.cmdk-item[aria-selected=true] .ico{color:hsl(var(--primary))}
.cmdk-empty{padding:40px;text-align:center;color:hsl(var(--muted-foreground));font-size:14.5px}
.cmdk-foot{display:flex;gap:16px;padding:10px 16px;border-top:1px solid hsl(var(--border));font-size:12.5px;color:hsl(var(--muted-foreground))}
.kbd{display:inline-grid;place-items:center;min-width:22px;height:22px;padding:0 6px;border-radius:6px;border:1px solid hsl(var(--border));background:hsl(var(--muted));font-family:var(--font-mono);font-size:11.5px;color:hsl(var(--muted-foreground))}

/* ---------- accordion ---------- */
.accordion{border-top:1px solid hsl(var(--border))}
.acc-item{border-bottom:1px solid hsl(var(--border))}
.acc-trigger{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:24px 0;border:0;background:none;text-align:left;font-size:18px;font-weight:600}
.acc-trigger .ico{font-size:20px;color:hsl(var(--muted-foreground));transition:transform .35s var(--ease-out)}
.acc-item.open .acc-trigger .ico{transform:rotate(45deg);color:hsl(var(--primary))}
.acc-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .45s var(--ease-out)}
.acc-item.open .acc-body{grid-template-rows:1fr}
.acc-body>div{overflow:hidden}
.acc-body p{padding:0 48px 24px 0;color:hsl(var(--muted-foreground));font-size:15.5px;line-height:1.75}

/* ---------- reveal motion ---------- */
[data-reveal]{opacity:0;transform:translateY(24px);filter:blur(6px);transition:opacity .9s var(--ease-out),transform 1s var(--ease-out),filter .9s var(--ease-out);transition-delay:var(--d,0ms)}
[data-reveal].in{opacity:1;transform:none;filter:none}
[data-reveal=scale]{transform:scale(.96)}
[data-reveal=fade]{transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  [data-reveal]{opacity:1;transform:none;filter:none}
}

.dialog-aside>.badge{align-self:flex-start}
.dialog-aside .d-hot{font-size:13.5px;color:hsl(0 0% 100%/.7)}
.dialog-aside .d-hot b{color:#fff}

/* typography: 防孤字 + 平衡换行 */
/* n-b：末尾两字不断行（防孤字）；n-p：副标题短语不断行；n-w：flex 容器里的文字包裹 */
n-b,n-p{white-space:nowrap}
n-w{display:inline}
p,li,dd,figcaption{text-wrap:pretty}
h1,h2,h3,h4,.lead{text-wrap:balance}
/* 行内图标对齐 */
.btn-link{display:inline-flex;align-items:center;gap:4px}
.btn-link .ico{font-size:1em}