/* ============================================================
   闪店互联官网 v2 · 设计系统
   目标：深色高级感 + 产品可视化，摆脱模板味
   ============================================================ */
:root{
  --ink:#0b1220;
  --ink-2:#16233a;
  --ink-3:#37465f;
  --muted:#56657d;          /* 正文辅助色：白底 5.6:1，比原来的 4.33 更实 */
  --line:#e8eef7;
  --line-dark:rgba(255,255,255,.10);
  --bg:#ffffff;
  --canvas:#fafbfe;          /* A 方向：页面画布极淡灰，卡片纯白 */
  --bg-soft:#f6f9fd;
  --brand:#2f6bff;
  --brand-2:#1b46c9;
  --brand-glow:rgba(47,107,255,.32);
  --brand-soft:rgba(47,107,255,.08);
  /* 统一深色（首屏 / 深色区块 / 页脚同一色系，避免三种深浅各异的黑） */
  --bg-dark:#0a1220;
  --bg-dark-2:#0e1b33;
  --mint:#12b886;        /* 仅用于「成功/正常」这类状态色 */
  --amber:#f0a020;
  --r-lg:20px;
  --r-md:14px;
  --r-sm:10px;
  --shadow-sm:0 2px 8px rgba(10,24,48,.06);
  --shadow-md:0 12px 32px rgba(10,24,48,.10);
  --shadow-lg:0 30px 80px rgba(6,18,40,.28);
  --max:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--canvas);color:var(--ink);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;line-height:1.2;font-weight:700}
p{margin:0}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
.mono{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

/* ---------------- 顶栏 ---------------- */
.header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.78);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.header.scrolled{border-bottom-color:var(--line);background:rgba(255,255,255,.92)}
.nav{display:flex;align-items:center;gap:40px;height:72px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;font-size:17px;letter-spacing:-.02em}
.logo img{height:28px;width:auto}
.nav-menu{display:flex;gap:30px;margin-left:auto;align-items:center}
.nav-menu a{font-size:15px;color:var(--ink-3);font-weight:500;padding:6px 0;position:relative}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--brand);
  transition:right .25s var(--ease);
}
.nav-menu a:hover{color:var(--ink)}
.nav-menu a:hover::after,.nav-menu a.active::after{right:0}
.nav-menu a.active{color:var(--brand)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:-.01em;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease);
  white-space:nowrap;
}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 20px var(--brand-glow)}
.btn-primary:hover{background:var(--brand-2);transform:translateY(-1px);box-shadow:0 10px 26px var(--brand-glow)}
.btn-ghost{border:1px solid var(--line);color:var(--ink-2);background:#fff}
.btn-ghost:hover{border-color:#c9d6ea;transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn-nav{height:38px;padding:0 16px;font-size:14px}

/* ---------------- 首屏（深色） ---------------- */
.hero{
  position:relative;overflow:hidden;color:#eaf0ff;
  background:
    radial-gradient(900px 520px at 78% -8%,rgba(47,107,255,.30),transparent 62%),
    radial-gradient(760px 520px at 4% 108%,rgba(91,140,255,.14),transparent 62%),
    linear-gradient(165deg,var(--bg-dark) 0%,#0c1527 46%,var(--bg-dark-2) 100%);
  padding:96px 0 110px;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  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(ellipse 70% 60% at 50% 30%,#000 35%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 35%,transparent 78%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:64px;align-items:center}
.badge{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;border-radius:999px;
  background:rgba(47,107,255,.14);border:1px solid rgba(47,107,255,.32);
  color:#9dc0ff;font-size:12.5px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;
}
.badge i{width:6px;height:6px;border-radius:50%;background:#7aa8ff;box-shadow:0 0 0 4px rgba(122,168,255,.18)}
.hero h1{
  font-size:clamp(42px,5vw,68px);line-height:1.08;margin:24px 0 22px;letter-spacing:-.04em;color:#fff;font-weight:800;
}
.hero h1 .grad{
  background:linear-gradient(100deg,#7aa8ff 0%,#4f8dff 40%,#12d8a0 110%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .lead{font-size:17.5px;line-height:1.78;color:#b7c7e2;max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.btn-hero{padding:0 26px;height:48px;font-size:15.5px}
.btn-glass{
  background:rgba(255,255,255,.06);color:#eaf0ff;border:1px solid rgba(255,255,255,.16);
  backdrop-filter:blur(6px);
}
.btn-glass:hover{background:rgba(255,255,255,.12);transform:translateY(-1px)}
.hero-meta{display:flex;gap:34px;margin-top:40px;flex-wrap:wrap}
.hero-meta div b{display:block;font-size:24px;color:#fff;letter-spacing:-.02em}
.hero-meta div span{font-size:12.5px;color:#9db0cf;letter-spacing:.02em}

/* 首屏产品面板 */
.shot{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.10),rgba(255,255,255,.03));
  border:1px solid rgba(255,255,255,.14);
  box-shadow:var(--shadow-lg);
  backdrop-filter:blur(8px);
}
.shot-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.10)}
.shot-bar i{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.22)}
.shot-bar .t{margin-left:10px;font-size:12px;color:#8ea3c6;letter-spacing:.04em}
.shot-body{padding:18px}
.kpi-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}
.kpi{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.09);
  border-radius:var(--r-sm);padding:12px 14px;
}
.kpi span{display:block;font-size:11.5px;color:#8ea3c6;margin-bottom:4px}
.kpi b{font-size:20px;color:#fff;letter-spacing:-.02em}
.kpi b.up{color:var(--mint)}
.mini-table{border:1px solid rgba(255,255,255,.09);border-radius:var(--r-sm);overflow:hidden}
.mini-row{display:grid;grid-template-columns:1.5fr .8fr .9fr;gap:8px;padding:9px 12px;font-size:12.5px;color:#c6d4ec;border-bottom:1px solid rgba(255,255,255,.06)}
.mini-row:last-child{border-bottom:none}
.mini-row.head{background:rgba(255,255,255,.05);color:#8ea3c6;font-size:11.5px;letter-spacing:.04em}
.pill{display:inline-flex;align-items:center;gap:5px;height:20px;padding:0 8px;border-radius:999px;font-size:11px;font-weight:600}
.pill.ok{background:rgba(18,184,134,.16);color:#5ff0c4}
.pill.run{background:rgba(47,107,255,.16);color:#9dc0ff}
.pill.warn{background:rgba(255,176,32,.14);color:#ffd08a}

/* ---------------- 通用区块 ---------------- */
.section{padding:104px 0}
/* A 方向：不再用分割线，画布灰 + 白卡片本身就分层 */
/* 2026-10-29：中间区域不再交替色块（用户反馈「划一下一个色块，太污染眼睛」）
   .soft / .stats-band 统一为白底，靠留白与卡片边界区分层级 */
.section.soft{background:transparent}
.section.dark{background:linear-gradient(180deg,var(--bg-dark),var(--bg-dark-2));color:#e6eefc}
.sec-head{max-width:720px;margin:0 auto 56px;text-align:center}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);margin-bottom:14px;
}
.section.dark .eyebrow{color:#7aa8ff}
.sec-head h2{font-size:clamp(30px,3vw,42px);letter-spacing:-.035em;font-weight:800;line-height:1.15}
.sec-head p{margin-top:16px;color:var(--muted);font-size:17px;line-height:1.75}
.section.dark .sec-head p{color:#93a7c8}

/* ---------------- 客户 / 平台条 ---------------- */
.logos{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.logos span{
  display:inline-flex;align-items:center;height:44px;padding:0 20px;border-radius:999px;
  border:1px solid #e2e8f3;background:#fff;box-shadow:0 1px 3px rgba(10,24,48,.04);color:var(--ink-3);font-size:14px;font-weight:600;
  box-shadow:var(--shadow-sm);
}
.logos span em{font-style:normal;color:var(--muted);font-weight:500;margin-left:6px;font-size:12.5px}

/* ---------------- 特性网格 ---------------- */
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.feature{
  position:relative;padding:30px;border:1px solid #e2e8f3;border-radius:var(--r-lg);background:#fff;
  box-shadow:0 2px 6px rgba(10,24,48,.05);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.feature:hover{transform:translateY(-4px);box-shadow:0 16px 38px rgba(10,24,48,.12);border-color:#cfdcf2}
.feature .ic{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,rgba(47,107,255,.13),rgba(91,140,255,.07));
  border:1px solid rgba(47,107,255,.16);margin-bottom:18px;
}
.feature .ic svg{width:22px;height:22px;stroke:var(--brand);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.feature h3{font-size:19px;margin-bottom:10px;letter-spacing:-.01em;font-weight:700}
.feature p{font-size:15px;color:var(--muted);line-height:1.75}
.feature ul{margin:14px 0 0;padding-left:18px;color:var(--ink-3);font-size:14.2px}
.feature li{margin:5px 0}

/* ---------------- 产品展示（分栏 + 面板） ---------------- */
.showcase{display:grid;grid-template-columns:.92fr 1.08fr;gap:56px;align-items:center}
.showcase.rev{grid-template-columns:1.08fr .92fr}
.showcase h2{font-size:clamp(27px,2.6vw,36px);margin-bottom:16px;letter-spacing:-.035em;font-weight:800}
.showcase p{color:var(--muted);font-size:15.8px;line-height:1.75}
.tick{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:12px}
.tick li{display:flex;gap:10px;font-size:15px;color:var(--ink-2)}
.tick svg{flex:none;width:18px;height:18px;margin-top:3px;stroke:var(--brand);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}

/* 亮色产品面板 */
.panel{
  border-radius:18px;background:#fff;border:1px solid #e2e8f3;
  box-shadow:0 18px 44px rgba(10,24,48,.13);overflow:hidden;
}
.panel-top{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);background:#fbfdff}
.panel-top i{width:9px;height:9px;border-radius:50%;background:#dde6f3}
.panel-top .u{margin-left:auto;font-size:11.5px;color:var(--muted)}
.panel-body{padding:18px}
.p-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.p-head b{font-size:14px}
.chip{font-size:11.5px;color:var(--brand);background:rgba(47,107,255,.10);padding:4px 10px;border-radius:999px;font-weight:600}
.tbl{border:1px solid var(--line);border-radius:12px;overflow:hidden}
.tr{display:grid;grid-template-columns:1.6fr .7fr .7fr .8fr;gap:8px;padding:10px 12px;font-size:12.8px;border-bottom:1px solid var(--line);color:var(--ink-2);align-items:center}
.tr:last-child{border-bottom:none}
.tr.head{background:#f7faff;color:var(--muted);font-size:11.5px;letter-spacing:.04em}
.bar{height:6px;border-radius:99px;background:#eef3fb;overflow:hidden}
.bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),#7aa8ff)}

/* ---------------- 数据条 ---------------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.stats div{padding:28px 14px;border-radius:var(--r-md);background:#fff;border:1px solid #e2e8f3;box-shadow:0 2px 6px rgba(10,24,48,.05)}
.stats b{display:block;font-size:clamp(26px,3vw,38px);letter-spacing:-.03em;color:var(--ink)}
.stats span{font-size:13px;color:var(--muted)}
.section.dark .stats div{background:rgba(255,255,255,.04);border-color:var(--line-dark)}
.section .stats div{background:#fff;border:1px solid var(--line);box-shadow:none}
.section.dark .stats b{color:#fff}
.section.dark .stats span{color:#93a7c8}

/* 浅色数据带（原来是深色块，三段黑看着割裂，2026-10-29 改浅） */
.section.stats-band{background:transparent}
.stats-band .stats div{background:#fff;border:1px solid var(--line);box-shadow:none}
.stats-band .stats b{color:var(--ink)}
.stats-band .stats span{color:var(--muted)}
.stats-band .stats b em{color:var(--brand);font-style:normal}

/* ---------------- 对比表 ---------------- */
.compare{overflow-x:auto;border:1px solid #e2e8f3;border-radius:18px;background:#fff;box-shadow:0 2px 8px rgba(10,24,48,.05)}
table{width:100%;border-collapse:collapse;min-width:680px;font-size:14.6px}
th,td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:#f7faff;font-size:13px;color:var(--muted);font-weight:700;letter-spacing:.03em}
tbody tr:last-child td{border-bottom:none}
td.bad{color:#b4453f}
td.good{color:#0d8f66;font-weight:600}
td.good::before{content:"✓ ";font-weight:700}

/* ---------------- 流程 ---------------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:s}
.step{position:relative;padding:28px 24px;border-radius:var(--r-md);background:#fff;border:1px solid #e2e8f3;box-shadow:0 2px 6px rgba(10,24,48,.05)}
.step::before{
  counter-increment:s;content:counter(s,decimal-leading-zero);
  font-size:12px;font-weight:800;letter-spacing:.14em;color:#7aa8ff;display:block;margin-bottom:12px;
}
.step h4{font-size:16.5px;color:var(--ink);margin-bottom:8px}
.step p{font-size:14.2px;color:var(--muted);line-height:1.75}

/* 深色区块内的流程（备用，不禁用） */
.section.dark .step{background:rgba(255,255,255,.04);border-color:var(--line-dark);box-shadow:none}
.section.dark .step h4{color:#fff}
.section.dark .step p{color:#93a7c8}
.section.dark .step::before{color:#7aa8ff}

/* 浅色流程（原深色 .step，现支持 light 变体） */
.steps.light .step{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.steps.light .step::before{color:var(--brand)}
.steps.light .step h4{color:var(--ink)}
.steps.light .step p{color:var(--muted)}

/* ---------------- FAQ ---------------- */
.faq{max-width:840px;margin:0 auto;display:grid;gap:12px}
details{border:1px solid #e2e8f3;border-radius:var(--r-md);background:#fff;padding:20px 22px;box-shadow:0 1px 3px rgba(10,24,48,.04);transition:box-shadow .2s var(--ease)}
details[open]{box-shadow:var(--shadow-sm)}
summary{cursor:pointer;font-weight:600;font-size:15.5px;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--brand);font-size:20px;line-height:1;font-weight:400}
details[open] summary::after{content:"–"}
details p{margin-top:12px;color:var(--muted);font-size:14.8px;line-height:1.75}

/* ---------------- CTA ---------------- */
.cta{
  position:relative;overflow:hidden;border-radius:24px;padding:64px 48px;text-align:center;color:#fff;
  background:
    radial-gradient(620px 320px at 82% 0%,rgba(255,255,255,.18),transparent 62%),
    linear-gradient(120deg,#1b3fa6,var(--brand) 58%,#5b8cff);
  box-shadow:0 30px 70px rgba(47,107,255,.28);
}
.cta h2{font-size:clamp(26px,2.8vw,34px);letter-spacing:-.03em}
.cta p{margin:14px 0 28px;color:rgba(255,255,255,.86);font-size:16px}
.cta .btn-primary{background:#fff;color:var(--brand-2);box-shadow:0 10px 26px rgba(0,0,0,.16)}
.cta .btn-primary:hover{background:#f2f6ff}
.cta .btn-glass{border-color:rgba(255,255,255,.34)}

/* ---------------- 页脚 ---------------- */
.footer{background:var(--bg-dark);color:#8ea3c6;padding:64px 0 30px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer .logo{color:#fff}
.footer .brand-desc{margin-top:14px;font-size:13.8px;line-height:1.8;color:#7f93b5}
.foot-col h4{color:#dfe9fb;font-size:13.5px;letter-spacing:.04em;margin-bottom:14px}
.foot-col a,.foot-col span{display:block;color:#8ea3c6;font-size:13.8px;margin:8px 0}
.foot-col a:hover{color:#fff}
.foot-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12.8px;color:#6f83a4;
}
.foot-bottom a{color:#8ea3c6}

/* ---------------- 内页头 ---------------- */
.page-hero{position:relative;overflow:hidden;color:#eaf0ff;padding:72px 0 64px;
  background:radial-gradient(700px 400px at 82% -20%,rgba(47,107,255,.28),transparent 62%),linear-gradient(160deg,var(--bg-dark),var(--bg-dark-2))}
.page-hero h1{font-size:clamp(30px,3.4vw,44px);letter-spacing:-.035em;color:#fff}
.page-hero p{margin-top:16px;color:#a9bad8;font-size:16.5px;max-width:680px}
.crumb{margin-top:18px;font-size:13px;color:#6f83a4}
.crumb a{color:#8ea3c6}

/* ---------------- 动效 ---------------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------------- 响应式 ---------------- */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .showcase,.showcase.rev{grid-template-columns:1fr;gap:32px}
  .g3{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav-menu{gap:20px}
}
@media (max-width:720px){
  .nav{height:62px;gap:16px}
  .nav-menu{display:none}
  .hero{padding:64px 0 72px}
  .hero .lead{font-size:16px}
  .section{padding:64px 0}
  .g3,.g2{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .cta{padding:40px 24px;border-radius:18px}
  .foot-grid{grid-template-columns:1fr}
  .hero-meta{gap:22px}
  .tr{grid-template-columns:1.4fr .8fr .8fr}
  .tr:nth-child(4){display:none}
}


/* ---------------- 联系我们（2026-10-29 重排） ---------------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.12fr; gap: 28px; align-items: start; }
.contact-card {
  border: 1px solid #e2e8f3; border-radius: 18px; background: #fff;
  box-shadow: 0 18px 44px rgba(10,24,48,.10); overflow: hidden;
}
.contact-card .cc-head {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 22px; border-bottom: 1px solid var(--line); background: #fbfdff;
  font-size: 14px; font-weight: 700; color: var(--ink-2);
}
.contact-card .cc-head::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--brand); box-shadow: 0 0 0 4px rgba(47,107,255,.14);
}
.contact-card .kv { padding: 6px 22px 18px; }
.kv-row {
  display: grid; grid-template-columns: 84px 1fr; gap: 16px; align-items: start;
  padding: 15px 0; border-bottom: 1px dashed var(--line);
}
.kv-row:last-child { border-bottom: none; }
.kv-row .k { font-size: 13.5px; color: var(--muted); }
.kv-row .v { font-size: 15px; color: var(--ink); font-weight: 600; line-height: 1.6; word-break: break-word; }
.kv-row .v small { display: block; font-weight: 400; font-size: 13px; color: var(--muted); margin-top: 4px; }
@media (max-width: 960px) {
  .contact-grid { grid-template-columns: 1fr; }
}