/* ===== InsRealm — Intel-inspired homepage (dark tech theme) ===== */
:root{
  --blue:#0a84e8;        /* Intel classic blue, brightened for dark bg */
  --blue-bright:#2f9bff;
  --blue-deep:#0054ae;
  --energy:#00c7fd;      /* Intel energy blue */
  --violet:#5b4bd6;      /* Intel gradient violet */
  --violet-2:#2a2a6e;
  --ink:#eef2f7;         /* primary text on dark */
  --ink-2:#aeb9c6;       /* secondary text */
  --muted:#6c7785;
  --line:#1e2835;        /* borders */
  --line-2:#283546;
  --bg:#05080f;          /* near-black navy canvas */
  --bg-soft:#0a0f18;     /* alt sections */
  --surface:#0e1420;     /* cards */
  --surface-2:#131b29;   /* hovered / raised */
  --radius:14px;
  --radius-sm:8px;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
  --shadow-lg:0 18px 50px rgba(0,0,0,.55);
  --glow:0 0 0 1px rgba(0,199,253,.25),0 8px 40px rgba(0,132,232,.25);
  --maxw:1280px;
  --nav-h:74px;
  --font:"IntelOne Text","Segoe UI","PingFang SC","Microsoft YaHei",-apple-system,system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  /* 极淡的科技网格 */
  background-image:
    linear-gradient(rgba(255,255,255,.015) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.015) 1px,transparent 1px);
  background-size:44px 44px,44px 44px;
  background-attachment:fixed,fixed;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* ---- 自定义滚动条（深色主题下系统默认滚动条太突兀） ---- */
*{scrollbar-width:thin;scrollbar-color:rgba(120,150,210,.34) transparent}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{
  background:rgba(120,150,210,.30);
  border-radius:99px;
  border:2px solid transparent;
  background-clip:padding-box}
::-webkit-scrollbar-thumb:hover{background:rgba(0,199,253,.55);background-clip:padding-box}
::-webkit-scrollbar-corner{background:transparent}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}

/* ---- buttons ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;border-radius:999px;
  padding:13px 28px;transition:.2s ease;white-space:nowrap;border:1.5px solid transparent;
}
.btn-sm{padding:9px 20px;font-size:14px}
/* 用较深的 Intel 经典蓝：白字对比度 5.75:1，满足 WCAG AA（--blue 太亮只有 3.75:1） */
.btn-primary{background:#0068b5;color:#fff;box-shadow:0 3px 12px rgba(0,104,181,.28)}
.btn-primary:hover{background:#0575c9;box-shadow:0 5px 16px rgba(0,104,181,.38);transform:translateY(-1px)}
.btn-ghost{color:var(--energy);padding-left:6px;padding-right:6px}
.btn-ghost:hover{color:#7ee8ff}
.btn-outline{border-color:rgba(255,255,255,.45);color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.12);border-color:#fff}
.link-arrow{color:var(--energy);font-weight:600;font-size:15px;display:inline-block;transition:.2s}
.link-arrow:hover{color:#7ee8ff;transform:translateX(2px)}

/* ---- header / nav (Intel-style single bar) ---- */
.site-header{position:sticky;top:0;z-index:60;
  background:#080b16;
  border-bottom:1px solid var(--line-2)}
.nav-inner{position:relative;display:flex;align-items:center;height:var(--nav-h);gap:8px}
.brand{display:flex;align-items:center;margin-right:44px}
.brand-logo{height:24px}
.main-nav{flex:1}
.nav-list{display:flex;align-items:center;gap:8px;list-style:none}
.nav-link{
  display:inline-flex;align-items:center;
  font-size:16px;font-weight:500;color:#eef1fb;letter-spacing:.01em;
  padding:10px 18px;border-radius:8px;transition:.15s;position:relative;
}
.nav-link::after{content:"";position:absolute;left:18px;right:18px;bottom:4px;height:2px;
  background:var(--blue-bright);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:.2s}
.nav-link:hover{color:#fff}
.nav-item.open .nav-link,.nav-link:hover{}
.nav-item.open .nav-link::after,.nav-link:hover::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:6px}
.nav-util{display:inline-flex;align-items:center;gap:7px;color:#d4d9ec;font-size:14px;font-weight:500;
  padding:9px 12px;border-radius:8px;transition:.15s}
.nav-util:hover{color:#fff;background:rgba(255,255,255,.07)}
.nav-util svg{flex:none}
.icon-btn{width:40px;height:40px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;color:#d4d9ec;transition:.15s}
.icon-btn:hover{background:rgba(255,255,255,.07);color:#fff}

/* ---- mega menu ---- */
.mega-wrap{position:absolute;left:0;right:0;top:100%;background:rgba(8,12,20,.97);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-2);box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(-8px);transition:.2s ease;}
.mega-wrap.open{opacity:1;visibility:visible;transform:translateY(0)}
.mega-panel{display:none;padding:36px 0 40px}
.mega-panel.active{display:block}
.mega-grid{display:grid;grid-template-columns:1fr 1fr 1.2fr;gap:48px;align-items:start}
.mega-col-wide{grid-column:span 2}
.mega-title{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:16px}
.mega-links{list-style:none;display:flex;flex-direction:column;gap:4px}
.mega-links.two-col{display:grid;grid-template-columns:1fr 1fr;gap:4px 32px}
.mega-links a{display:flex;flex-direction:column;gap:1px;padding:9px 12px;border-radius:8px;transition:.15s;margin-left:-12px}
.mega-links a:hover{background:rgba(0,132,232,.10)}
.mega-link-title{font-size:15.5px;font-weight:600;color:var(--ink)}
.mega-links a:hover .mega-link-title{color:var(--energy)}
.mega-link-desc{font-size:13px;color:var(--muted)}
.mega-feature{background:var(--surface-2);border:1px solid var(--line-2);border-radius:var(--radius);padding:28px}
.mega-feature-eyebrow{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--energy)}
.mega-feature h4{font-size:20px;margin:8px 0 8px;line-height:1.3;color:#fff}
.mega-feature p{font-size:14px;color:var(--ink-2);margin-bottom:14px}
.mega-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);opacity:0;visibility:hidden;transition:.2s;z-index:50}
.mega-overlay.open{opacity:1;visibility:visible}

/* ---- hero（居中式，主视觉待定） ---- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:#070a16}

/* 流动极光背景 */
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.aurora{position:absolute;border-radius:50%;filter:blur(80px);will-change:transform}
.a1{width:640px;height:640px;top:-18%;left:2%;
  background:radial-gradient(circle,rgba(10,132,232,.24),transparent 66%);
  animation:drift1 26s ease-in-out infinite}
.a2{width:580px;height:580px;bottom:-26%;left:36%;
  background:radial-gradient(circle,rgba(12,110,200,.16),transparent 66%);
  animation:drift2 32s ease-in-out infinite}
@keyframes drift1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(80px,50px) scale(1.14)}}
@keyframes drift2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-90px,-40px) scale(1.1)}}

/* 缓慢平移的科技网格（边缘淡出） */
.hero-grid{position:absolute;inset:-60px;
  background-image:linear-gradient(rgba(130,170,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(130,170,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse 76% 66% at 50% 45%,#000 28%,transparent 78%);
  mask-image:radial-gradient(ellipse 76% 66% at 50% 45%,#000 28%,transparent 78%);
  animation:gridPan 30s linear infinite}
@keyframes gridPan{from{transform:translate(0,0)}to{transform:translate(56px,56px)}}

.hero-inner{position:relative;z-index:2;max-width:960px;
  display:flex;flex-direction:column;align-items:center;text-align:center;
  padding-top:128px;padding-bottom:136px}

.eyebrow-badge{display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:600;letter-spacing:.06em;color:#c3e2ff;
  padding:8px 17px;border-radius:999px;margin-bottom:28px;
  background:rgba(10,132,232,.10);border:1px solid rgba(0,199,253,.26);backdrop-filter:blur(6px)}
.eyebrow-badge i{width:7px;height:7px;border-radius:50%;background:var(--energy);
  box-shadow:0 0 10px var(--energy);animation:pulseDot 2s ease-in-out infinite}
@keyframes pulseDot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.75)}}

.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--energy);margin-bottom:16px}
.hero h1{font-size:clamp(38px,6.2vw,76px);line-height:1.05;font-weight:800;letter-spacing:-.03em;color:#fff;
  text-shadow:0 0 60px rgba(0,140,255,.26)}
.grad-text{background:linear-gradient(90deg,var(--blue-bright),var(--energy));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:clamp(16px,1.5vw,19px);color:var(--ink-2);margin:26px auto 38px;max-width:660px}
.hero-cta{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.hero-cta .btn{padding:15px 32px;font-size:16px}

/* 首屏入场动画 */
.reveal{opacity:0;transform:translateY(18px);
  animation:revealUp .75s cubic-bezier(.22,.8,.3,1) forwards;animation-delay:var(--d,0s)}
@keyframes revealUp{to{opacity:1;transform:none}}

/* 滚动渐入：初始隐藏状态由 JS 加 .reveal-ready 后才生效，
   这样 JS 失效或不支持 IntersectionObserver 时内容依然可见 */
.reveal-ready [data-reveal]{opacity:0;transform:translateY(16px)}
.reveal-ready [data-reveal].in{opacity:1;transform:none;
  transition:opacity .6s ease,transform .6s cubic-bezier(.22,.8,.3,1)}

/* ---- stats ---- */
.stats{position:relative;background:#060a12;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:56px 0;overflow:hidden}
.stats-grid{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;text-align:center}
.stat{position:relative;display:flex;flex-direction:column;gap:10px;padding:8px 16px;transition:transform .25s ease}
.stat:not(:last-child)::after{content:"";position:absolute;right:0;top:14%;bottom:14%;width:1px;
  background:var(--line-2)}
.stat:hover{transform:translateY(-4px)}
.stat-num{font-size:clamp(42px,5vw,60px);font-weight:800;line-height:1;letter-spacing:-.02em;
  color:#fff;transition:color .25s ease}
.stat:hover .stat-num{color:var(--energy)}
.stat-num small{font-size:.42em;font-weight:700;margin-left:2px;-webkit-text-fill-color:var(--energy)}
.stat-value{font-variant-numeric:tabular-nums}
.stat-label{font-size:14.5px;color:var(--ink-2)}

/* ---- sections ---- */
.section{padding:96px 0;position:relative}
.section-alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin:0 auto 52px;text-align:center}
.section-head .eyebrow{margin-bottom:14px}
.section-head h2{font-size:clamp(28px,3.4vw,42px);font-weight:800;letter-spacing:-.02em;line-height:1.13;color:#fff}
.section-head p{font-size:17px;color:var(--ink-2);margin-top:14px}

/* cards */
.cards-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
/* display:block —— 卡片可能是 <a>（整卡可点），显式声明避免行内表现 */
.card{display:block;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:32px;transition:.25s;box-shadow:var(--shadow);position:relative;overflow:hidden}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--blue)}
.card-icon{width:52px;height:52px;border-radius:12px;margin-bottom:18px;background:var(--blue);position:relative}
.card-icon::after{content:"";position:absolute;inset:13px;background:#0e1420;border-radius:6px}
.icon-sw::after{clip-path:polygon(0 0,60% 0,60% 60%,100% 60%,100% 100%,0 100%)}
.icon-doc::after{clip-path:polygon(0 0,75% 0,100% 25%,100% 100%,0 100%)}
.icon-demo::after{clip-path:polygon(25% 15%,25% 85%,85% 50%)}
.card-eyebrow{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--energy)}
.card h3{font-size:21px;margin:8px 0 10px;line-height:1.3;color:#fff;position:relative}
.card p{font-size:15px;color:var(--ink-2);margin-bottom:16px;position:relative}

/* ---- 产品分区：左侧列表 + 右侧详情 ---- */
.product-block{margin-bottom:64px}
.product-block:last-child{margin-bottom:0}
.block-head{margin-bottom:26px}
.block-tag{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;
  text-transform:uppercase;letter-spacing:.08em;color:var(--energy)}
.block-dot{width:6px;height:6px;border-radius:50%;background:var(--energy);box-shadow:0 0 8px var(--energy)}
.block-head h3{font-size:clamp(22px,2.4vw,28px);font-weight:700;color:#fff;margin-top:10px;letter-spacing:-.01em}

.tabs{display:grid;grid-template-columns:290px 1fr;gap:22px;align-items:start}
.tab-list{display:flex;flex-direction:column;gap:8px}
.tab{position:relative;display:flex;flex-direction:column;gap:3px;text-align:left;
  padding:16px 18px;border-radius:12px;border:1px solid var(--line);background:var(--surface);
  transition:.2s ease;overflow:hidden}
.tab::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--blue-bright);
  transform:scaleY(0);transform-origin:center;transition:.22s ease}
.tab:hover{border-color:var(--line-2);background:var(--surface-2)}
.tab.is-active{border-color:var(--blue);background:rgba(10,132,232,.10)}
.tab.is-active::before{transform:scaleY(1)}
.tab-name{font-size:16px;font-weight:700;color:var(--ink-2);transition:.2s}
.tab.is-active .tab-name{color:#fff}
.tab:hover .tab-name{color:#fff}
.tab-desc{font-size:13px;color:var(--muted)}
.tab.is-active .tab-desc{color:#9fc4e8}
.tab:focus-visible{outline:2px solid var(--energy);outline-offset:2px}

.tab-panels{position:relative;min-height:100%}
.tab-panel{border:1px solid var(--line);border-radius:14px;background:var(--surface);
  padding:34px 36px;box-shadow:var(--shadow);position:relative;overflow:hidden}
/* hidden 必须始终生效，优先级要压过下面的 .has-media{display:grid} */
.tab-panel[hidden]{display:none !important}
.tab-panel.is-active{animation:panelIn .3s ease}
@keyframes panelIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
/* 带实物图的面板：左文右图 */
.tab-panel.has-media{display:grid;grid-template-columns:1.18fr .82fr;gap:30px;align-items:center}
.tab-panel.has-media .panel-main{position:relative;z-index:1}
.tab-panel.has-media .feat-list{grid-template-columns:1fr;gap:10px}
.tab-panel.has-media .panel-lead{margin-bottom:22px}
.panel-media{margin:0;display:flex;justify-content:center;align-items:center}
/* 宽度限制加在内层：grid 子项若用 auto 外边距会变成收缩适应，导致 img 宽度循环依赖 */
.panel-media picture{position:relative;display:block;width:100%;max-width:280px}
.panel-media img{position:relative;display:block;width:100%;height:auto;
  filter:drop-shadow(0 22px 38px rgba(0,0,0,.62))}

.tab-panel h4{font-size:24px;font-weight:800;color:#fff;letter-spacing:-.01em;position:relative}
.panel-lead{font-size:15.5px;color:var(--ink-2);margin:12px 0 24px;max-width:620px;position:relative}
.feat-title{display:block;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;
  color:var(--muted);margin-bottom:14px;position:relative}
/* 关键指标表 */
.spec-list{margin:0 0 24px;position:relative}
.spec{display:flex;align-items:baseline;justify-content:space-between;gap:18px;
  padding:10px 2px;border-bottom:1px solid var(--line);transition:.18s}
.spec:first-child{border-top:1px solid var(--line)}
.spec:hover{background:rgba(10,132,232,.06);border-color:var(--line-2)}
.spec dt{font-size:12.5px;font-weight:700;letter-spacing:.05em;color:var(--muted);white-space:nowrap}
.spec dd{margin:0;text-align:right;font-size:17px;font-weight:700;color:#fff;
  font-variant-numeric:tabular-nums;line-height:1.35}
.spec dd em{font-style:normal;font-size:12.5px;font-weight:600;color:var(--energy);margin-left:3px}

.feat-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:11px 24px;margin-bottom:24px;position:relative}
.feat-list li{position:relative;padding-left:24px;font-size:14.5px;color:var(--ink-2)}
.feat-list li::before{content:"";position:absolute;left:0;top:7px;width:12px;height:7px;
  border-left:2px solid var(--energy);border-bottom:2px solid var(--energy);
  transform:rotate(-45deg)}

@media(max-width:900px){
  .tabs{grid-template-columns:1fr;gap:16px}
  .tab-list{flex-direction:row;overflow-x:auto;gap:10px;padding-bottom:4px;scrollbar-width:none}
  .tab-list::-webkit-scrollbar{display:none}
  .tab{flex:0 0 auto;min-width:190px;padding:13px 16px}
  .tab::before{top:auto;bottom:0;left:0;right:0;width:auto;height:3px;
    transform:scaleX(0);background:var(--blue-bright)}
  .tab.is-active::before{transform:scaleX(1)}
  .tab-panel{padding:28px 22px}
  .feat-list{grid-template-columns:1fr}
  /* 窄屏：实物图移到文字上方（限宽只能加在内层，理由同上） */
  .tab-panel.has-media{grid-template-columns:1fr;gap:22px}
  .tab-panel.has-media .panel-media{order:-1}
  .tab-panel.has-media .panel-media picture{max-width:340px}
}

/* solutions */
.solutions-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.solution-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.25s;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.solution-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--blue);opacity:0;transition:.25s}
.solution-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.solution-card:hover::before{opacity:1}
.solution-tag{display:inline-block;font-size:12px;font-weight:700;color:var(--energy);background:rgba(0,199,253,.12);border:1px solid rgba(0,199,253,.25);padding:4px 12px;border-radius:999px;margin-bottom:14px}
.solution-card h3{font-size:20px;margin-bottom:8px;color:#fff}
.solution-card p{font-size:14.5px;color:var(--ink-2);margin-bottom:14px}

/* ---- 合作伙伴 logo 墙 ---- */
.logo-wall{display:grid;grid-template-columns:repeat(auto-fit,minmax(168px,1fr));gap:14px}
.logo-item{display:flex;align-items:center;justify-content:center;
  height:98px;padding:18px 22px;border:1px solid var(--line);border-radius:12px;
  background:var(--surface);transition:.22s}
.logo-item:hover{border-color:var(--line-2);background:var(--surface-2)}
.logo-item img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;
  opacity:.62;transition:opacity .22s}
.logo-item:hover img{opacity:1}

/* ---- 登录 / 个人中心 ---- */
.acct-gate{max-width:560px;padding:26px 0 10px}
.acct-gate h1{font-size:clamp(26px,3.2vw,36px);font-weight:800;color:#fff;letter-spacing:-.02em;margin-bottom:12px}
.auth-spinner{width:34px;height:34px;margin:0 auto 22px;border-radius:50%;
  border:3px solid rgba(140,170,220,.22);border-top-color:var(--energy);
  animation:authSpin .8s linear infinite}
@keyframes authSpin{to{transform:rotate(360deg)}}
/* 顶栏显示为已登录用户名时略作区分 */
.nav-util[data-logged-in]{color:#fff}
.nav-util[data-logged-in] .nav-util-label{max-width:130px;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap}
@media(prefers-reduced-motion:reduce){.auth-spinner{animation:none}}

/* ---- 404 ---- */
.nf-hero{min-height:calc(100vh - var(--nav-h))}
.nf-wrap{position:relative;z-index:2;max-width:720px;
  display:flex;flex-direction:column;align-items:center;text-align:center;
  padding-top:118px;padding-bottom:130px}
.nf-code{font-size:clamp(88px,15vw,168px);font-weight:800;line-height:1;letter-spacing:-.05em;
  color:var(--blue-bright)}
.nf-wrap h1{font-size:clamp(24px,3.4vw,38px);font-weight:800;color:#fff;letter-spacing:-.02em;margin-top:14px}
.nf-wrap .hero-sub{margin:16px auto 32px}

/* ---- 产品详情页 ---- */
.pd-hero{position:relative;overflow:hidden;padding:34px 0 72px;
  background:#080b16;
  border-bottom:1px solid var(--line)}
.crumbs{display:flex;align-items:center;gap:9px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-bottom:34px}
.crumbs a{color:var(--ink-2);transition:.15s}
.crumbs a:hover{color:var(--energy)}
.crumbs em{font-style:normal;color:#fff;font-weight:600}
.pd-top{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.pd-copy h1{font-size:clamp(32px,4.4vw,52px);font-weight:800;letter-spacing:-.025em;color:#fff;margin:12px 0 8px;line-height:1.06}
.pd-tag{font-size:17px;color:var(--energy);font-weight:600;margin-bottom:16px}
.pd-lead{font-size:16px;color:var(--ink-2);max-width:560px;margin-bottom:28px}
.pd-cta{display:flex;gap:14px;flex-wrap:wrap}
.pd-media{margin:0;display:flex;justify-content:center;align-items:center}
.pd-media picture{position:relative;display:block;width:100%;max-width:400px}
.pd-media img{position:relative;display:block;width:100%;height:auto;
  filter:drop-shadow(0 26px 44px rgba(0,0,0,.62))}
/* 无实物图时的字母标记 */
.pd-mark{position:relative;width:200px;height:200px;border-radius:34px;display:flex;align-items:center;justify-content:center;
  background:var(--surface-2);border:1px solid var(--line-2)}
.pd-mark span{position:relative;font-size:88px;font-weight:800;letter-spacing:-.04em;
  color:var(--blue-bright)}

.pd-narrow{max-width:860px}
.pd-narrow .feat-title{margin-bottom:18px;font-size:13px}
.pd-narrow .spec-list,.pd-narrow .feat-list{margin-bottom:0}
.pd-narrow .spec dd{font-size:19px}
.pd-narrow .feat-list{grid-template-columns:1fr 1fr;gap:13px 28px}

/* 产品亮点 */
.hl-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px 30px}
.hl-list li{position:relative;padding-left:28px;font-size:15px;color:var(--ink-2);line-height:1.6}
.hl-list li::before{content:"";position:absolute;left:0;top:9px;width:13px;height:7px;
  border-left:2px solid var(--energy);border-bottom:2px solid var(--energy);transform:rotate(-45deg)}

/* 分组规格表 */
.spec-groups{display:grid;grid-template-columns:1fr 1fr;gap:12px 34px}
.spec-group{break-inside:avoid}
.spec-group h3{font-size:13px;font-weight:700;letter-spacing:.05em;color:var(--energy);
  margin:14px 0 4px;padding-bottom:8px;border-bottom:1px solid var(--line-2)}
.spec-group .spec{padding:11px 2px;align-items:flex-start}
.spec-group .spec:first-child{border-top:none}
.spec-group .spec dd{font-size:14.5px;font-weight:600;line-height:1.5}
.spec-group .spec dd em{display:inline;font-style:normal;color:var(--energy);font-weight:700;font-size:15px}
.spec-group .spec dt{padding-top:2px;max-width:52%}

.specs-pending{font-size:15px;color:var(--ink-2);padding:20px 22px;
  border:1px dashed var(--line-2);border-radius:12px;background:var(--surface)}

.pd-apps{display:flex;flex-wrap:wrap;gap:12px}
.pd-apps a{display:inline-flex;align-items:center;font-size:14.5px;color:var(--ink-2);
  padding:11px 18px;border:1px solid var(--line);border-radius:999px;background:var(--surface);transition:.18s}
.pd-apps a:hover{color:#fff;border-color:var(--blue);background:rgba(10,132,232,.10);transform:translateY(-2px)}

.rel-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.rel-card{display:flex;flex-direction:column;gap:5px;padding:22px;border:1px solid var(--line);
  border-radius:12px;background:var(--surface);transition:.22s;box-shadow:var(--shadow)}
.rel-card:hover{transform:translateY(-4px);border-color:var(--blue);box-shadow:var(--shadow-lg)}
.rel-name{font-size:17px;font-weight:700;color:#fff}
.rel-desc{font-size:13.5px;color:var(--muted);margin-bottom:8px}
.rel-card .link-arrow{font-size:14px}

@media(max-width:900px){
  .pd-top{grid-template-columns:1fr;gap:30px}
  .pd-media{order:-1}
  .pd-media picture{max-width:330px}
  .pd-mark{width:150px;height:150px;border-radius:26px}
  .pd-mark span{font-size:66px}
  .pd-narrow .feat-list,.hl-list,.spec-groups{grid-template-columns:1fr}
}

/* ---- CTA band ---- */
.cta-band{position:relative;overflow:hidden;background:#0a4a9e;color:#fff;padding:72px 0;border-top:1px solid var(--line)}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-copy h2{font-size:clamp(26px,3vw,38px);font-weight:800;letter-spacing:-.02em}
.cta-copy p{font-size:17px;color:#d6e6f7;margin-top:8px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-band .btn-primary{background:#fff;color:#0054ae;box-shadow:0 6px 24px rgba(0,0,0,.25)}
.cta-band .btn-primary:hover{background:#eaf4ff}

/* ---- footer ---- */
.site-footer{background:#02050b;color:#9aa5b2;padding:60px 0 28px;font-size:14px;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(5,1fr);gap:32px 26px;padding-bottom:40px;border-bottom:1px solid var(--line)}
.footer-logo{height:24px;margin-bottom:16px}
.footer-brand p{font-size:13.5px;color:#6c7785;line-height:1.7}
.footer-col h5{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:#e7eaee;margin-bottom:14px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#9aa5b2;font-size:14px;transition:.15s}
.footer-col a:hover{color:var(--energy)}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:12.5px;color:#5c6675}
.footer-legal a{color:#5c6675}
.footer-legal a:hover{color:#9aa5b2}

/* ---- 弹窗：试用申请 / 注册 / 技术支持 ---- */
.modal-root{position:fixed;inset:0;z-index:120;display:flex;align-items:center;justify-content:center;padding:24px}
.modal-root[hidden]{display:none}
.modal-backdrop{position:absolute;inset:0;background:rgba(2,4,10,.72);backdrop-filter:blur(6px);opacity:0;transition:.18s}
.modal-root.open .modal-backdrop{opacity:1}
.modal{position:relative;width:100%;max-width:520px;max-height:90vh;overflow-y:auto;overscroll-behavior:contain;
  background:#0e1420;
  border:1px solid var(--line-2);border-radius:18px;padding:32px 30px 32px 36px;box-shadow:var(--shadow-lg);
  opacity:0;transform:translateY(12px) scale(.98);transition:.2s ease}
/* 弹窗滚动条：更细、内缩，不顶到圆角 */
.modal{scrollbar-width:thin;scrollbar-color:rgba(120,150,210,.38) transparent}
.modal::-webkit-scrollbar{width:8px}
.modal::-webkit-scrollbar-track{background:transparent;margin:14px 0}
.modal::-webkit-scrollbar-thumb{background:rgba(120,150,210,.30);border-radius:99px;
  border:2px solid transparent;background-clip:padding-box}
.modal::-webkit-scrollbar-thumb:hover{background:rgba(0,199,253,.55);background-clip:padding-box}
.modal-root.open .modal{opacity:1;transform:none}
.modal-close{position:absolute;top:14px;right:14px;width:36px;height:36px;border-radius:8px;
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);transition:.15s}
.modal-close:hover{background:rgba(255,255,255,.08);color:#fff}
.modal-eyebrow{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--energy)}
.modal h3{font-size:23px;font-weight:800;color:#fff;margin:6px 0 6px;letter-spacing:-.01em}
.modal-desc{font-size:14.5px;color:var(--ink-2);margin-bottom:18px}

.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field label{font-size:13px;font-weight:600;color:var(--ink-2)}
.field input,.field textarea{
  width:100%;font-family:inherit;font-size:15px;color:var(--ink);
  background:rgba(255,255,255,.04);border:1px solid var(--line-2);border-radius:10px;
  padding:11px 13px;transition:.15s;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#5c6675}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);
  background:rgba(10,132,232,.08);box-shadow:0 0 0 3px rgba(10,132,232,.18)}
.field-hint{font-size:12.5px;color:var(--muted);margin:-6px 0 14px}
.form-error{font-size:13.5px;color:#ff8a8a;background:rgba(255,90,90,.10);
  border:1px solid rgba(255,90,90,.28);border-radius:8px;padding:9px 12px;margin-bottom:14px}
.form-error[hidden]{display:none}
.modal-submit{width:100%;margin-top:4px}

.modal-or{position:relative;text-align:center;margin:18px 0 14px}
.modal-or::before{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:var(--line-2)}
.modal-or span{position:relative;background:#0d1322;padding:0 14px;font-size:12.5px;color:var(--muted)}
.modal-contact{display:flex;gap:10px}
.modal-contact a{flex:1;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:13.5px;color:var(--ink-2);white-space:nowrap;
  padding:10px 12px;border:1px solid var(--line-2);border-radius:10px;transition:.15s}
.modal-contact a:hover{color:#fff;border-color:var(--blue);background:rgba(10,132,232,.08)}

.modal-done{text-align:center;padding:14px 0 6px}
.modal-done[hidden]{display:none}
.done-icon{width:64px;height:64px;margin:0 auto 18px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:#fff;background:var(--blue)}
.modal-done h3{margin-bottom:10px}
.modal-done p{font-size:14.5px;color:var(--ink-2);margin-bottom:22px}

@media(max-width:520px){
  .modal{padding:28px 18px 28px 22px}
  .field-row{grid-template-columns:1fr;gap:0}
  .modal-contact{flex-direction:column}
}

/* ---- 减弱动效偏好 ---- */
@media(prefers-reduced-motion:reduce){
  .aurora,.hero-grid,.eyebrow-badge i{animation:none}
  .reveal{opacity:1;transform:none;animation:none}
  .reveal-ready [data-reveal]{opacity:1;transform:none;transition:none}
  .stat,.stat-num{transition:none}
}

/* ---- mobile menu toggle (hidden on desktop) ---- */
.menu-toggle{display:none;flex-direction:column;gap:4px}
/* 手机端二级菜单：JS 会把它克隆进每个导航项，默认必须全局隐藏，
   否则桌面端会把这些链接直接铺在导航栏里 */
.m-sub{display:none}
.menu-toggle span{width:20px;height:2px;background:var(--ink-2);transition:.2s}

/* ===== responsive ===== */
@media(max-width:980px){
  .hero-inner{padding-top:92px;padding-bottom:104px}
  .stats-grid{grid-template-columns:repeat(3,1fr);gap:20px 12px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .mega-grid{grid-template-columns:1fr}
  .mega-feature{display:none}
}
@media(max-width:860px){
  .nav-util-label{display:none}
  .nav-util{padding:9px}
}
@media(max-width:720px){
  /* 只改左右内边距：用 padding 简写会把 .hero-inner 等元素的上下内边距一起清零 */
  .container{padding-left:20px;padding-right:20px}
  .main-nav{display:none}
  /* 登录入口在手机上必须保留：它是唯一的登录方式，藏掉等于没法登录 */
  #registerBtn{display:inline-flex}
  .menu-toggle{display:inline-flex}
  .nav-actions{gap:2px}
  .nav-util{padding:9px 7px}
  /* 手机上不用桌面版 mega 面板，改为菜单内折叠 */
  .mega-wrap,.mega-overlay{display:none !important}
  .main-nav.mobile-open{display:block;position:fixed;top:var(--nav-h);left:0;right:0;bottom:0;background:var(--bg);padding:8px 20px 32px;overflow:auto;z-index:55}
  .main-nav.mobile-open .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .main-nav.mobile-open .nav-link{width:100%;justify-content:space-between;font-size:17px;font-weight:600;
    padding:16px 2px;border-bottom:1px solid var(--line);border-radius:0}
  /* 展开指示：+ / – */
  .main-nav.mobile-open .nav-link::after{content:"+";position:static;transform:none;background:none;
    width:auto;height:auto;color:var(--muted);font-size:19px;font-weight:400;line-height:1}
  .main-nav.mobile-open .nav-item.m-open .nav-link{color:var(--energy);border-bottom-color:transparent}
  .main-nav.mobile-open .nav-item.m-open .nav-link::after{content:"–";color:var(--energy)}
  .m-sub{display:none;padding:2px 0 10px 10px;border-bottom:1px solid var(--line)}
  .main-nav.mobile-open .nav-item.m-open .m-sub{display:flex;flex-direction:column}
  .m-sub a{display:flex;flex-direction:column;gap:1px;padding:11px 10px;border-radius:8px;margin-left:-10px}
  .m-sub a:active{background:rgba(10,132,232,.12)}
  .m-sub .mega-link-title{font-size:15px;font-weight:600;color:var(--ink)}
  .m-sub .mega-link-desc{font-size:12.5px;color:var(--muted)}
  /* 抽屉里的登录入口，做成主色按钮以示区别 */
  .m-auth{margin-top:18px}
  .main-nav.mobile-open .m-auth .nav-link{justify-content:center;border-bottom:none;
    background:#0068b5;color:#fff;border-radius:999px;padding:14px 20px}
  .main-nav.mobile-open .m-auth .nav-link::after{content:none}
  .cards-grid,.solutions-grid{grid-template-columns:1fr}
  .card,.solution-card{padding:24px 22px}
  .stats-grid{grid-template-columns:1fr;gap:28px}
  /* 规格行改为「标签在上、数值在下」，窄屏左右并排会挤成两三行 */
  .spec{flex-direction:column;align-items:flex-start;gap:3px;padding:12px 2px}
  .spec dt{max-width:none;padding-top:0}
  .spec dd{text-align:left;font-size:15.5px}
  .spec-group .spec dd{font-size:15px}
  .spec-group h3{margin-top:20px}
  .pd-hero{padding-top:26px;padding-bottom:52px}
  .pd-copy h1{margin-top:8px}
  .footer-grid{gap:26px 24px;padding-bottom:32px}
  .footer-brand{grid-column:1 / -1}
  .stat:not(:last-child)::after{right:12%;left:12%;top:auto;bottom:-14px;width:auto;height:1px;
    background:var(--line-2)}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .section{padding:64px 0}
}