/* ============================================================
   即刻智能 · 产品详情页共享样式（products/product.css）
   暗色科技风，与官网主站一致；品牌色 #0071E3 / #4DA3FF
   ============================================================ */
:root {
  --bg: #050508;
  --bg2: #0a0a14;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-hi: rgba(255, 255, 255, 0.07);
  --line: rgba(255, 255, 255, 0.1);
  --orange: #FF6B00;
  --blue: #0071E3;
  --blue2: #4DA3FF;
  --txt: #e8ecf4;
  --dim: rgba(255, 255, 255, 0.6);
  --dim2: rgba(255, 255, 255, 0.45);
  --grad: linear-gradient(90deg, #4DA3FF, #0071E3);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--txt);
  line-height: 1.7;
  font-size: 15px;
}
img { max-width: 100%; }
a { color: var(--blue2); text-decoration: none; }
:focus-visible { outline: 2px solid var(--blue2); outline-offset: 2px; border-radius: 4px; }
.skip {
  position: fixed; top: -60px; left: 16px; z-index: 999;
  padding: 10px 18px; border-radius: 8px; background: var(--blue);
  color: #fff; font-weight: 600; transition: top .2s;
}
.skip:focus-visible { top: 12px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}

.ph-wrap { max-width: 1200px; margin: 0 auto; padding: 0 5vw; }

/* ---------- 与首页一致的导航（fixed，滚动变玻璃拟态） ---------- */
.jk-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: transparent; transition: background .5s, box-shadow .5s; }
.jk-nav.scrolled { background: rgba(5, 5, 8, 0.9); backdrop-filter: blur(24px); box-shadow: 0 4px 30px rgba(0, 113, 227, 0.15); }
.jk-nav-line {
  position: absolute; bottom: 0; left: 0; right: 0; height: 1px; opacity: 0;
  background: linear-gradient(90deg, transparent, #0071E3, transparent);
  box-shadow: none; transition: opacity .5s, box-shadow .5s;
}
.jk-nav.scrolled .jk-nav-line { opacity: 1; box-shadow: 0 0 20px rgba(0, 113, 227, 0.5); }
.jk-nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; padding: 0 5vw; max-width: 1600px; margin: 0 auto; transition: height .5s;
}
.jk-nav.scrolled .jk-nav-inner { height: 56px; }
.jk-logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.jk-logo img { height: 32px; width: auto; }
.jk-menu { display: none; align-items: center; gap: 32px; list-style: none; margin: 0; padding: 0; }
.jk-link {
  position: relative; font-size: 0.85rem; font-weight: 500; letter-spacing: .025em;
  color: rgba(255, 255, 255, 0.6); min-height: 44px; display: inline-flex; align-items: center;
  transition: color .3s;
}
.jk-link:hover, .jk-link:focus-visible { color: #0071E3; }
.jk-uline {
  position: absolute; bottom: -4px; left: 50%; transform: translateX(-50%);
  height: 2px; width: 0; background: #0071E3; border-radius: 999px; transition: width .3s;
}
.jk-link:hover .jk-uline, .jk-link:focus-visible .jk-uline { width: 100%; }
.jk-right { display: flex; align-items: center; gap: 12px; }
.jk-cta {
  display: inline-flex; align-items: center; gap: 8px; min-height: 40px;
  padding: 10px 24px; border-radius: 999px; font-size: 0.85rem; font-weight: 600; color: #fff;
  background: linear-gradient(135deg, #0071E3 0%, #0066CC 100%);
  box-shadow: 0 4px 20px rgba(0, 113, 227, 0.3); transition: box-shadow .3s, transform .3s;
}
.jk-cta:hover { box-shadow: 0 6px 26px rgba(0, 113, 227, 0.45); transform: translateY(-1px); }
.jk-burger { display: inline-flex; flex-direction: column; gap: 6px; padding: 10px 8px; background: none; border: 0; cursor: pointer; min-width: 44px; align-items: center; }
.jk-burger span { width: 20px; height: 2px; background: #fff; transition: transform .3s, opacity .3s; }
.jk-burger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.jk-burger.open span:nth-child(2) { opacity: 0; }
.jk-burger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.jk-mobile {
  position: absolute; top: 100%; left: 0; right: 0; max-height: 0; opacity: 0; overflow: hidden;
  background: rgba(5, 5, 8, 0.95); backdrop-filter: blur(20px); transition: max-height .3s, opacity .3s;
}
.jk-mobile.open { max-height: 420px; opacity: 1; }
.jk-mobile-in { display: flex; flex-direction: column; gap: 12px; padding: 20px 24px 24px; }
.jk-mobile-in a {
  color: rgba(255, 255, 255, 0.7); font-size: 14px; font-weight: 500;
  padding: 8px 0; min-height: 40px; display: flex; align-items: center; transition: color .3s;
}
.jk-mobile-in a:hover { color: #0071E3; }
.jk-mobile-cta {
  margin-top: 8px; justify-content: center; border-radius: 999px; color: #fff !important; font-weight: 600;
  background: linear-gradient(135deg, #0071E3, #0066CC); padding: 12px 0 !important;
}
@media (min-width: 1024px) {
  .jk-menu { display: flex; }
  .jk-burger, .jk-mobile { display: none; }
}
@media (max-width: 1023.5px) {
  .jk-cta { display: none; }
}

/* ---------- Hero ---------- */
.ph-hero {
  background:
    radial-gradient(800px 400px at 20% 0%, rgba(0, 113, 227, .12), transparent 60%),
    radial-gradient(600px 300px at 80% 20%, rgba(77, 163, 255, .08), transparent 60%),
    var(--bg);
  padding: 150px 0 64px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.ph-hero::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(0, 113, 227, .6), transparent);
}
.crumb { font-size: 12px; color: var(--dim2); margin-bottom: 22px; display: flex; gap: 8px; flex-wrap: wrap; }
.crumb a { color: var(--dim2); }
.crumb a:hover { color: var(--blue2); }
.crumb b { color: var(--dim); font-weight: 500; }
.ph-tag {
  display: inline-block; font-size: 12px; letter-spacing: 2px; color: var(--blue2);
  border: 1px solid rgba(0, 113, 227, .35); border-radius: 999px; padding: 4px 14px;
  background: rgba(0, 113, 227, .08); margin-bottom: 18px;
}
.ph-hero h1 {
  font-size: clamp(24px, 4.6vw, 42px); font-weight: 800; line-height: 1.25;
  letter-spacing: -0.5px; max-width: 860px;
  background: linear-gradient(90deg, #ffffff, #bcd8ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.ph-sub { margin-top: 18px; max-width: 760px; color: var(--dim); font-size: 15px; }
.ph-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.ph-actions.center { justify-content: center; }
.btn {
  min-height: 46px; display: inline-flex; align-items: center; gap: 8px;
  border-radius: 999px; padding: 12px 26px; font-size: 14px; font-weight: 600;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn:active { transform: scale(.96); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 4px 24px rgba(0, 113, 227, .4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(0, 113, 227, .5); }
.btn-ghost { color: #fff; border: 1px solid rgba(255, 255, 255, .35); background: rgba(255, 255, 255, .06); }
.btn-ghost:hover { background: rgba(255, 255, 255, .14); }
.ph-stats { display: flex; gap: 0; margin-top: 48px; flex-wrap: wrap; row-gap: 22px; }
.stat { padding: 4px 42px; border-left: 1px solid var(--line); }
.stat:first-child { padding-left: 0; border-left: 0; }
.stat b { font-size: 32px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; display: block; line-height: 1.2; }
.stat span { font-size: 12px; color: var(--dim2); letter-spacing: .5px; }
@media (max-width: 640px) { .stat { padding: 4px 26px; } .stat b { font-size: 26px; } }

/* ---------- Sections ---------- */
.ph-intro { padding: 72px 0 12px; }
.ph-intro h2 { font-size: 22px; margin-bottom: 16px; color: #fff; }
.ph-intro p { color: var(--dim); max-width: 900px; line-height: 1.9; }
.ph-sec { padding: 84px 0; }
.ph-alt { background: var(--bg2); }
.ph-sec h2 {
  font-size: clamp(21px, 3vw, 30px); font-weight: 800; color: #fff; letter-spacing: -.5px;
}
.ph-sec h2::after {
  content: ''; display: block; width: 46px; height: 3px; border-radius: 3px;
  background: var(--grad); margin-top: 14px;
}
.sec-sub { color: var(--dim2); font-size: 14px; margin: 14px 0 42px; }
.grid { display: grid; gap: 18px; }
.g4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.g3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.g2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 18px;
  padding: 30px 28px; transition: transform .25s, border-color .25s, box-shadow .25s, background .25s;
}
.card:hover {
  transform: translateY(-4px); border-color: rgba(0, 113, 227, .4);
  background: var(--panel-hi, rgba(255, 255, 255, .07));
  box-shadow: 0 18px 44px rgba(0, 0, 0, .45);
}
.card h3 { position: relative; font-size: 16px; color: #fff; margin-bottom: 12px; padding-bottom: 10px; font-weight: 700; }
.card h3::after {
  content: ''; position: absolute; left: 0; bottom: 0; width: 26px; height: 2px;
  border-radius: 2px; background: var(--grad); opacity: .8;
}
.card p { font-size: 13.5px; color: var(--dim); line-height: 1.85; }
.card ul { margin: 8px 0 0; padding-left: 2px; list-style: none; display: grid; gap: 8px; }
.card ul li {
  position: relative; padding-left: 18px; font-size: 13.5px; color: var(--dim); line-height: 1.7;
}
.card ul li::before {
  content: ''; position: absolute; left: 0; top: 9px; width: 6px; height: 6px;
  border-radius: 2px; background: var(--grad); transform: rotate(45deg);
}
/* 痛点卡：主页同款橙色点缀；功能卡/场景卡：品牌蓝 */
.pain { border-top: 2px solid rgba(255, 107, 0, .65); }
.pain h3::after { background: linear-gradient(90deg, #FF6B00, #ff9a4d); }
.feat { border-top: 2px solid rgba(0, 113, 227, .6); }
.scene { border-top: 2px solid rgba(77, 163, 255, .4); }
/* ---------- 实施路径：分步时间轴 ---------- */
.ph-path-sec { position: relative; }
.path {
  list-style: none; margin: 0; padding: 0; counter-reset: step;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
  position: relative;
}
/* 横向连接线：贯穿 4 个节点圆心 */
.path::before {
  content: ''; position: absolute; top: 27px; left: calc(12.5% - 40px); right: calc(12.5% - 40px);
  height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, rgba(0, 113, 227, .15), rgba(77, 163, 255, .75) 50%, rgba(0, 113, 227, .15));
  box-shadow: 0 0 12px rgba(77, 163, 255, .35);
}
.path-step { position: relative; display: flex; flex-direction: column; align-items: center; text-align: center; }
.path-num {
  position: relative; z-index: 1;
  width: 56px; height: 56px; border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  font-style: normal; font-weight: 800; font-size: 18px; letter-spacing: 1px;
  color: #fff; background: linear-gradient(135deg, #0a0a14, #10182b);
  border: 1px solid rgba(77, 163, 255, .55);
  box-shadow: 0 0 0 6px var(--bg), 0 8px 24px rgba(0, 113, 227, .35);
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.path-num::after {
  content: ''; position: absolute; inset: -1px; border-radius: inherit; padding: 1px;
  background: linear-gradient(135deg, #4DA3FF, rgba(77, 163, 255, 0) 55%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
/* 节点间的行进箭头 */
.path-step:not(:last-child) .path-num::before {
  content: ''; position: absolute; top: 50%; right: -26px; margin-top: -5px;
  border: solid rgba(77, 163, 255, .8); border-width: 2px 2px 0 0;
  width: 9px; height: 9px; transform: rotate(45deg);
}
.path-step:hover .path-num {
  transform: translateY(-3px); border-color: rgba(77, 163, 255, .9);
  box-shadow: 0 0 0 6px var(--bg), 0 10px 30px rgba(0, 113, 227, .5);
}
.path-card {
  margin-top: 20px; width: 100%; flex: 1;
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 22px 18px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.path-step:hover .path-card {
  transform: translateY(-4px); border-color: rgba(0, 113, 227, .4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .4);
}
.path-card h3 { font-size: 15px; color: #fff; font-weight: 700; margin-bottom: 10px; }
.path-card p { font-size: 13px; color: var(--dim); line-height: 1.8; text-align: left; }
/* 阶段序号与卡片标题的呼应色 */
.path-card h3::before { content: 'STEP ' counter(step); counter-increment: step; display: block; font-size: 10px; letter-spacing: 2px; color: var(--blue2); margin-bottom: 6px; font-weight: 600; opacity: .85; }
@media (max-width: 960px) {
  .path { grid-template-columns: repeat(2, 1fr); gap: 26px 18px; }
  .path::before { display: none; }
  .path-step:not(:last-child) .path-num::before { display: none; }
}
@media (max-width: 560px) {
  .path { grid-template-columns: 1fr; gap: 0; }
  /* 纵向轨道 */
  .path::before {
    display: block; left: 27px; right: auto; top: 30px; bottom: 30px; width: 2px; height: auto;
    background: linear-gradient(180deg, rgba(0, 113, 227, .15), rgba(77, 163, 255, .75) 50%, rgba(0, 113, 227, .15));
  }
  .path-step { flex-direction: row; align-items: flex-start; gap: 18px; text-align: left; padding-bottom: 26px; }
  .path-step:last-child { padding-bottom: 0; }
  .path-num { width: 48px; height: 48px; flex-shrink: 0; font-size: 16px; box-shadow: 0 0 0 6px var(--bg), 0 8px 24px rgba(0, 113, 227, .35); }
  .path-step:not(:last-child) .path-num::before {
    display: block; right: auto; top: auto; bottom: -18px; left: 50%; margin-left: -5px;
    transform: rotate(135deg);
  }
  .path-card { margin-top: 0; }
  .path-card p { text-align: left; }
}

/* ---------- Values band ---------- */
.ph-values {
  background: linear-gradient(90deg, rgba(0, 113, 227, .16), rgba(77, 163, 255, .08));
  border-block: 1px solid var(--line); padding: 52px 0; position: relative;
}
.ph-values::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(600px 200px at 50% 0%, rgba(77, 163, 255, .08), transparent 70%);
}
.vals { display: flex; justify-content: space-around; gap: 24px; flex-wrap: wrap; position: relative; }
.val { text-align: center; }
.val b { font-size: clamp(26px, 4vw, 40px); font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; display: block; }
.val span { font-size: 13px; color: var(--dim); }
@media (max-width: 768px) { .ph-sec, .ph-cta-band { padding-top: 56px; padding-bottom: 56px; } }

/* ---------- FAQ ---------- */
.faq-wrap { max-width: 860px; }
.faq { border: 1px solid var(--line); border-radius: 14px; background: var(--panel); margin-bottom: 12px; overflow: hidden; transition: border-color .25s, background .25s; }
.faq[open] { border-color: rgba(0, 113, 227, .4); background: rgba(0, 113, 227, .05); }
.faq summary {
  cursor: pointer; list-style: none; padding: 18px 22px; color: #fff; font-size: 15px; font-weight: 600;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 52px;
}
.faq summary::after { content: '+'; color: var(--blue2); font-size: 18px; flex-shrink: 0; transition: transform .2s; }
.faq[open] summary::after { transform: rotate(45deg); }
.faq p { padding: 0 22px 20px; color: var(--dim); font-size: 13.5px; line-height: 1.85; }

/* ---------- Related ---------- */
.rel-card { display: block; }
.rel-tag { font-size: 11px; color: var(--blue2); letter-spacing: 1px; }
.rel-card h3 { margin-top: 8px; transition: color .25s; }
.rel-card:hover h3 { color: var(--blue2); }
.rel-more { display: inline-block; margin-top: 12px; font-size: 13px; color: var(--blue2); transition: transform .25s; }
.rel-card:hover .rel-more { transform: translateX(4px); }

/* ---------- CTA band ---------- */
.ph-cta-band {
  text-align: center; padding: 72px 0;
  background:
    radial-gradient(600px 300px at 50% 0%, rgba(0, 113, 227, .14), transparent 60%),
    var(--bg2);
  border-top: 1px solid var(--line);
}
.ph-cta-band h2 { font-size: clamp(22px, 3.4vw, 34px); color: #fff; font-weight: 800; }
.ph-cta-band p { color: var(--dim); margin: 14px auto 6px; max-width: 640px; }
.ph-cta-band .ph-actions { justify-content: center; }

/* ---------- Footer ---------- */
.ph-footer { border-top: 1px solid var(--line); background: #030306; padding: 52px 0 0; }
.foot { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 36px; }
.foot h3 { font-size: 14px; color: #fff; margin-bottom: 14px; }
.foot p { font-size: 12px; color: var(--dim2); margin-bottom: 8px; }
.geo-line { line-height: 1.9; }
.foot-links { display: grid; gap: 2px; }
.foot-links a {
  color: var(--dim2); font-size: 12px; padding: 8px 0; min-height: 36px;
  display: flex; align-items: center;
}
.foot-links a:hover { color: var(--blue2); }
.ph-copy { border-top: 1px solid var(--line); margin-top: 40px; padding: 18px 5vw; text-align: center; font-size: 12px; color: var(--dim2); }
.ph-copy a { color: var(--dim); }
@media (max-width: 860px) { .foot { grid-template-columns: 1fr; } }

/* ---------- Back to top ---------- */
.btop {
  position: fixed; right: 18px; bottom: 24px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line); background: rgba(16, 24, 40, .8); color: var(--blue2);
  font-size: 20px; cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: all .25s;
}
.btop.is-show { opacity: 1; visibility: visible; transform: none; }
.btop:hover { background: var(--blue); color: #fff; }