/* 艾派科技官网 · 视觉系统
   取向：克制的黑白灰 + 单一品牌蓝，大留白、细分隔线、少圆角 */
:root{
  --ink:#0c0f14;
  --ink-soft:#1b2230;
  --muted:#5d6878;
  --muted-2:#98a2b3;
  --line:#e6e9ee;
  --paper:#ffffff;
  --mist:#f6f7f9;
  --accent:#1b4dff;
  --accent-dark:#0f37c8;
  --dark:#0b0e13;
  --radius:8px;
  --wrap:1180px;
  --shadow:0 1px 2px rgba(12,15,20,.04),0 12px 32px -18px rgba(12,15,20,.18);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.8;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.hero .wrap>*,.grid>*,.stats>*,.metrics>*{min-width:0}

h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.015em;line-height:1.2}
h1{font-size:clamp(30px,4.2vw,54px);letter-spacing:-.03em;font-weight:700}
h2{font-size:clamp(23px,2.7vw,36px);font-weight:650}
h3{font-size:17.5px}
p{margin:0}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line);
  transition:box-shadow .25s;
}
.site-header.scrolled{box-shadow:0 1px 16px rgba(12,15,20,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.logo{display:flex;align-items:center;gap:11px;font-weight:650;font-size:16.5px;letter-spacing:-.01em}
.logo .mark{
  width:32px;height:32px;flex:0 0 auto;border-radius:7px;background:var(--accent);
  display:grid;place-items:center;color:#fff;font-size:16px;font-weight:600;letter-spacing:0;
}
.logo small{display:block;font-size:11px;font-weight:400;color:var(--muted-2);letter-spacing:.06em;margin-top:-1px}
.nav{display:flex;align-items:center;gap:2px}
.nav a{padding:9px 14px;border-radius:6px;font-size:15px;color:var(--ink-soft);transition:.16s}
.nav a:hover{color:var(--accent);background:#f2f4f8}
.nav a.active{color:var(--ink);font-weight:600}
.header-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;width:40px;height:36px;border:1px solid var(--line);border-radius:6px;background:#fff;cursor:pointer;padding:0}
.burger span{display:block;width:16px;height:1.5px;background:var(--ink);margin:3.5px auto;border-radius:2px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--radius);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-1px)}
.btn-accent{background:#fff;color:var(--ink)}
.btn-accent:hover{background:#f0f2f6}
.btn-sm{padding:9px 18px;font-size:14.5px}

/* ---------- 首屏（动态） ---------- */
.hero{position:relative;background:var(--dark);color:#fff;overflow:hidden;padding:96px 0 0}
.hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(120% 80% at 50% 0%,#000 40%,transparent 85%);
  -webkit-mask-image:radial-gradient(120% 80% at 50% 0%,#000 40%,transparent 85%);
}
.hero-glow{
  position:absolute;width:760px;height:760px;left:var(--mx,72%);top:var(--my,8%);
  transform:translate(-50%,-50%);pointer-events:none;
  background:radial-gradient(circle,rgba(27,77,255,.30),rgba(27,77,255,0) 62%);
  transition:left .6s cubic-bezier(.2,.7,.2,1),top .6s cubic-bezier(.2,.7,.2,1);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center;padding-bottom:88px}
.hero h1{color:#fff;margin-bottom:22px}
.hero .lead{color:#9aa6b8;font-size:17px;max-width:520px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.hero .btn-primary{background:#fff;color:var(--ink)}
.hero .btn-primary:hover{background:#e9ebf0}
.hero .btn-ghost{background:transparent;border-color:rgba(255,255,255,.26);color:#fff}
.hero .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.06)}
.hero-note{margin-top:24px;font-size:13.5px;color:#7b8698;letter-spacing:.02em}
.hero-note b{color:#c8d2e0;font-weight:500}
.hero-art{position:relative}
.hero-art svg{display:block;width:100%;height:auto}
.draw{stroke-dasharray:560;stroke-dashoffset:560;animation:draw 2.4s cubic-bezier(.4,0,.2,1) forwards}
.draw.d2{animation-delay:.2s}.draw.d3{animation-delay:.4s}.draw.d4{animation-delay:.6s}
.pulse{animation:pulse 3.6s ease-in-out infinite}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes pulse{0%,100%{opacity:.25}50%{opacity:.6}}

/* 首屏底部滚动条 */
.marquee{position:relative;border-top:1px solid rgba(255,255,255,.09);background:rgba(255,255,255,.02);overflow:hidden}
.marquee-track{display:flex;width:max-content;animation:slide 34s linear infinite}
.marquee span{font-size:13px;color:#8592a6;letter-spacing:.1em;white-space:nowrap;padding:18px 0}
.marquee span:after{content:"";display:inline-block;width:1px;height:11px;background:rgba(255,255,255,.16);margin:0 34px;vertical-align:middle}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- 数字条 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}
.metric{padding:40px 30px;border-right:1px solid var(--line)}
.metric:last-child{border-right:none}
.metric b{display:block;font-size:clamp(26px,3vw,38px);font-weight:700;letter-spacing:-.03em;line-height:1.1}
.metric b em{font-style:normal;font-size:15px;font-weight:600;color:var(--muted);margin-left:5px;letter-spacing:0}
.metric span{display:block;font-size:13.5px;color:var(--muted);margin-top:10px}

/* ---------- 区块 ---------- */
section{padding:104px 0}
.alt{background:var(--mist)}
.dark{background:var(--dark);color:#fff}
.dark h2,.dark h3{color:#fff}
.dark p{color:#9aa6b8}
.sec-head{max-width:720px;margin-bottom:56px}
.sec-head .label{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;color:var(--accent);letter-spacing:.06em;margin-bottom:16px}
.sec-head .label:before{content:"";width:18px;height:1.5px;background:var(--accent);display:block}
.dark .sec-head .label{color:#7fa0ff}
.dark .sec-head .label:before{background:#7fa0ff}
.sec-head h2{margin-bottom:16px}
.sec-head p{color:var(--muted);font-size:16.5px;max-width:660px}
.dark .sec-head p{color:#98a4b6}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .label{justify-content:center}
.sec-head.center .label:before{display:none}
.sec-head.center p{margin-left:auto;margin-right:auto}

/* ---------- 左右交替大板块 ---------- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.feature+.feature{margin-top:104px}
.feature.flip .f-text{order:2}
.f-text h2{margin-bottom:18px}
.f-text>p{color:var(--muted);font-size:16.5px;margin-bottom:26px}
.f-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.f-list li{padding:14px 0;border-bottom:1px solid var(--line);display:flex;gap:16px;font-size:15.4px}
.f-list li b{flex:0 0 30px;color:var(--muted-2);font-weight:600;font-size:13.5px;letter-spacing:.04em;padding-top:3px}
.f-cta{margin-top:30px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.panel-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;border-bottom:1px solid var(--line);background:#fbfcfd}
.panel-bar i{width:8px;height:8px;border-radius:50%;background:#dfe3ea;display:block}
.panel-bar span{margin-left:10px;font-size:12.5px;color:var(--muted-2);letter-spacing:.04em}
.panel-body{padding:20px 22px}
.prow{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14.6px}
.prow:last-child{border-bottom:none}
.prow span{color:var(--muted);font-size:13.6px}
.dot-ok,.dot-idle{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;white-space:nowrap}
.dot-ok{color:#0f7a58}.dot-ok:before{content:"";width:6px;height:6px;border-radius:50%;background:#12b886}
.dot-idle{color:var(--muted-2)}.dot-idle:before{content:"";width:6px;height:6px;border-radius:50%;background:#c8cfda}

/* ---------- 行业网格 ---------- */
.ind{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.ind article{background:#fff;padding:34px 30px}
.dark .ind h3{color:var(--ink)}
.dark .ind p{color:var(--muted)}
.dark .ind ul{color:var(--ink-soft)}
.ind h3{margin-bottom:10px}
.ind p{color:var(--muted);font-size:14.8px}
.ind ul{list-style:none;margin:18px 0 0;padding:0;font-size:14px;color:var(--ink-soft)}
.ind ul li{padding-left:14px;position:relative;margin-bottom:7px}
.ind ul li:before{content:"";position:absolute;left:0;top:11px;width:5px;height:5px;background:var(--accent);border-radius:1px}

/* ---------- 时间线 ---------- */
.tl{display:grid;grid-template-columns:repeat(5,1fr);position:relative}
.tl:before{content:"";position:absolute;left:0;right:0;top:9px;height:1px;background:var(--line)}
.tl>div{padding:38px 24px 0 0;position:relative}
.tl>div:before{content:"";position:absolute;top:4px;left:0;width:11px;height:11px;border-radius:50%;background:#fff;border:2px solid var(--accent)}
.tl b{display:block;margin-bottom:8px;font-size:16px}
.tl span{font-size:14px;color:var(--muted)}

/* ---------- 价格 ---------- */
.plans{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;display:flex;flex-direction:column;transition:.2s}
.plan:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.plan.featured{border-color:var(--ink);box-shadow:var(--shadow)}
.plan .badge{align-self:flex-start;font-size:12px;font-weight:600;color:#fff;background:var(--ink);padding:4px 10px;border-radius:4px;margin-bottom:14px;letter-spacing:.04em}
.plan h3{font-size:16px;color:var(--muted);font-weight:600;letter-spacing:.02em}
.plan .amount{font-size:34px;font-weight:700;letter-spacing:-.03em;margin:10px 0 4px}
.plan .amount small{font-size:13.5px;font-weight:500;color:var(--muted);letter-spacing:0}
.plan>p{font-size:14px;color:var(--muted)}
.list{list-style:none;margin:20px 0 0;padding:0;font-size:14.6px;color:var(--ink-soft)}
.list li{padding-left:15px;position:relative;margin-bottom:9px}
.list li:before{content:"";position:absolute;left:0;top:11px;width:5px;height:5px;background:var(--accent);border-radius:1px}
.list.green li:before{background:#12b886}
.plan .btn{margin-top:24px;width:100%}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:14.8px;min-width:660px}
th,td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#fafbfc;font-size:13px;color:var(--muted);font-weight:600;letter-spacing:.05em;white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#fbfcfd}
td strong{font-weight:600}
.price-cell{white-space:nowrap;font-weight:700;color:var(--accent)}

/* ---------- 卡片（内页） ---------- */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.card h3{margin-bottom:12px}
.card p{color:var(--muted);font-size:15px}
.card .icon{width:30px;height:30px;display:grid;place-items:center;margin-bottom:18px;font-size:13px;font-weight:700;color:var(--accent);border:1px solid var(--line);border-radius:6px}
.card.accent .icon{color:#0f7a58}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.step{padding:24px 0 0;border-top:2px solid var(--ink)}
.step b{display:block;margin-bottom:8px}
.step span{font-size:14px;color:var(--muted)}

/* ---------- 提示 ---------- */
.notice{border-left:2px solid var(--accent);background:#f7f9ff;padding:18px 22px;color:#243356;font-size:15px;border-radius:0 var(--radius) var(--radius) 0}
.notice.warn{border-left-color:#c9822a;background:#fdf9f2;color:#5c4418}

/* ---------- 内页头 ---------- */
.page-hero{background:var(--dark);color:#fff;padding:72px 0 64px;position:relative;overflow:hidden}
.page-hero:before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
}
.page-hero .wrap{position:relative}
.page-hero h1{color:#fff;margin-bottom:14px}
.page-hero p{color:#95a1b4;max-width:720px;margin:0}
.breadcrumb{font-size:13.5px;color:#6f7a8d;margin-bottom:18px}
.breadcrumb a:hover{color:#fff}

/* ---------- CTA ---------- */
.cta-band{background:var(--dark);color:#fff;border-radius:var(--radius);padding:52px 56px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin-bottom:10px}
.cta-band p{margin:0;color:#98a4b6;font-size:15px}
.cta-band .btn-primary{background:#fff;color:var(--ink)}
.cta-band .btn-primary:hover{background:#e9ebf0}
.cta-band .btn-accent{background:var(--accent);color:#fff}
.cta-band .btn-accent:hover{background:var(--accent-dark)}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.info-row{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);align-items:baseline}
.info-row:last-child{border-bottom:none}
.info-row b{flex:0 0 84px;color:var(--muted);font-weight:600;font-size:13.5px;letter-spacing:.04em}
.info-row span{font-size:15.4px}
.copy{display:inline-flex;align-items:center;font-size:13px;color:var(--accent);cursor:pointer;background:none;border:none;padding:0 0 0 10px}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
details.faq-item{border-bottom:1px solid var(--line);padding:22px 0}
details.faq-item summary{list-style:none;cursor:pointer;font-size:17px;font-weight:600;display:flex;justify-content:space-between;gap:20px;align-items:center}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary:after{content:"+";color:var(--muted-2);font-weight:400;font-size:20px;line-height:1}
details.faq-item[open] summary:after{content:"−"}
details.faq-item p{margin-top:14px;color:var(--muted);font-size:15.4px;max-width:860px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#8b95a5;padding:64px 0 28px;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.08)}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.06em;margin-bottom:18px;font-weight:600}
.site-footer a{display:block;margin-bottom:11px;color:#8b95a5;transition:.16s}
.site-footer a:hover{color:#fff}
.footer-logo{color:#fff;font-weight:650;font-size:17px;margin-bottom:16px;letter-spacing:-.01em}
.footer-bottom{padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#697485}

/* ---------- 工具 ---------- */
.muted{color:var(--muted)}
.mt24{margin-top:24px}.mt32{margin-top:32px}.center{text-align:center}
.badge-line{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.tag{font-size:13px;border:1px solid var(--line);color:var(--muted);padding:5px 12px;border-radius:4px}
.tag.green{border-color:#cdeee2;color:#0f7a58}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{border-left:2px solid var(--ink);padding-left:16px}
.stat b{display:block;font-size:19px;margin-bottom:4px}
.stat span{font-size:13.5px;color:var(--muted)}

/* 动效：无脚本时默认全部可见 */
.js-fx .fx{opacity:0;transform:translateY(18px)}
.js-fx .fx.in{opacity:1;transform:none;transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
@media (prefers-reduced-motion:reduce){
  .js-fx .fx{opacity:1;transform:none}
  .draw{animation:none;stroke-dashoffset:0}
  .pulse{animation:none}
  .marquee-track{animation:none}
  html{scroll-behavior:auto}
}

@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:44px;padding-bottom:64px}
  .hero-art{order:-1;width:100%;max-width:100%;margin:0 auto}
  .feature{grid-template-columns:1fr;gap:36px}
  .feature.flip .f-text{order:0}
  .feature+.feature{margin-top:72px}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .metric{border-bottom:1px solid var(--line)}
  .metric:nth-child(2n){border-right:none}
  .ind{grid-template-columns:1fr}
  .tl{grid-template-columns:1fr}
  .tl:before{display:none}
  .tl>div{padding:22px 0 22px 26px;border-left:1px solid var(--line)}
  .tl>div:before{top:28px;left:-6px}
  .plans{grid-template-columns:repeat(2,1fr)}
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .cta-band{padding:38px 32px}
}
@media (max-width:720px){
  body{font-size:15.5px}
  .wrap{padding:0 18px}
  section{padding:64px 0}
  .sec-head{margin-bottom:36px}
  .nav{display:none;position:absolute;left:0;right:0;top:72px;background:#fff;flex-direction:column;align-items:stretch;padding:10px 18px 20px;border-bottom:1px solid var(--line);box-shadow:0 18px 30px rgba(12,15,20,.08)}
  .nav.open{display:flex}
  .nav a{padding:12px 4px;border-radius:0;border-bottom:1px solid var(--line)}
  .burger{display:block}
  .header-cta .btn{display:none}
  .g2,.g3,.g4,.plans,.steps,.metrics{grid-template-columns:1fr}
  .hero{padding-top:64px}
  .hero h1{font-size:30px}
  .metric{border-right:none;padding:22px 0}
  .card{padding:24px}
  .cta-band{padding:30px 24px}
  .footer-grid{grid-template-columns:1fr}
}