/* ============================================================
   培友办公软件官网 · 主样式
   风格：浅色科技底 + 蓝青紫渐变 + 光晕网格 + 玻璃拟态
   ============================================================ */

:root {
  /* 浅色科技底 */
  --bg: #f4f7fc;
  --bg-2: #ffffff;
  --panel: rgba(255, 255, 255, 0.86);
  --panel-2: #ffffff;
  --line: rgba(15, 23, 42, 0.10);
  --line-strong: rgba(15, 23, 42, 0.17);
  --text: #0d1626;
  --text-dim: #48586f;
  --text-faint: #7b8aa3;

  --cyan: #0891b2;
  --blue: #2563eb;
  --violet: #7c3aed;
  --green: #059669;
  --amber: #d97706;
  --grad: linear-gradient(120deg, #0891b2 0%, #2563eb 48%, #7c3aed 100%);
  --grad-soft: linear-gradient(120deg, rgba(8, 145, 178, 0.12), rgba(37, 99, 235, 0.12) 50%, rgba(124, 58, 237, 0.12));

  --radius: 16px;
  --shadow: 0 18px 44px rgba(15, 30, 60, 0.10);
  --shadow-lg: 0 30px 70px rgba(15, 30, 60, 0.16);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.container { width: min(1200px, 92vw); margin: 0 auto; }

/* ---------------- 背景光效（浅色版：网格 + 极光光斑） ---------------- */
.bg-fx { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.bg-fx::before {
  content: ""; position: absolute; inset: -20%;
  background:
    radial-gradient(620px 420px at 12% -4%, rgba(8, 145, 178, 0.20), transparent 62%),
    radial-gradient(560px 420px at 90% 4%, rgba(124, 58, 237, 0.17), transparent 64%),
    radial-gradient(680px 480px at 52% 108%, rgba(37, 99, 235, 0.16), transparent 66%);
  animation: aurora 22s ease-in-out infinite alternate;
}
@keyframes aurora {
  0%   { transform: translate3d(0,0,0) scale(1); }
  50%  { transform: translate3d(-2%,1.5%,0) scale(1.06); }
  100% { transform: translate3d(2%,-1%,0) scale(1.02); }
}
.bg-grid {
  position: absolute; inset: -10% -10% 0 -10%;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.055) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(circle at 50% 16%, #000 0%, transparent 82%);
  -webkit-mask-image: radial-gradient(circle at 50% 16%, #000 0%, transparent 82%);
  animation: gridmove 30s linear infinite;
}
@keyframes gridmove { from { transform: translateY(0); } to { transform: translateY(54px); } }

.scanline {
  position: absolute; left: 0; right: 0; height: 180px;
  background: linear-gradient(to bottom, transparent, rgba(37, 99, 235, 0.06), transparent);
  animation: scan 11s linear infinite;
}
@keyframes scan { from { top: -180px; } to { top: 100%; } }

/* ---------------- 导航（深蓝科技风） ---------------- */
header.nav {
  position: sticky; top: 0; z-index: 60;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: linear-gradient(90deg, #0a2f9e 0%, #0f47c2 55%, #0a2c86 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 6px 24px rgba(9, 40, 130, 0.35);
}
.nav-inner { display: flex; align-items: center; gap: 26px; height: 68px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: 0.02em; }
.brand .mark {
  width: 36px; height: 36px; display: grid; place-items: center;
  background: rgba(255, 255, 255, 0.14); border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 9px; color: #fff;
  font-weight: 900; font-size: 15px;
  box-shadow: 0 0 18px rgba(120, 180, 255, 0.35);
}
.brand .txt { font-size: 18px; color: #fff; }
.brand .txt small { display: block; font-size: 10px; font-weight: 500; color: rgba(255, 255, 255, 0.62); letter-spacing: 0.18em; }

.nav-links { display: flex; gap: 6px; margin-left: auto; }
.nav-links a {
  position: relative; padding: 9px 16px; border-radius: 8px; font-size: 15px;
  color: rgba(255, 255, 255, 0.82); transition: 0.2s; font-weight: 500;
}
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, 0.12); }
.nav-links a.active { color: #fff; font-weight: 700; background: none; }
.nav-links a.active::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: -14px; height: 3px;
  background: #7cc4ff; border-radius: 3px 3px 0 0;
  box-shadow: 0 0 10px rgba(124, 196, 255, 0.9);
}
.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-cta .tag { color: rgba(255, 255, 255, 0.85); border-color: rgba(255, 255, 255, 0.3); background: rgba(255, 255, 255, 0.08); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 11px; font-size: 14.5px; font-weight: 600;
  border: 1px solid var(--line-strong); background: #fff; color: var(--text);
  cursor: pointer; transition: 0.22s; white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); border-color: rgba(37, 99, 235, 0.45); box-shadow: 0 12px 26px rgba(37, 99, 235, 0.16); }
.btn-primary {
  background: var(--grad); color: #fff; border: none;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.30);
}
.btn-primary:hover { box-shadow: 0 16px 40px rgba(37, 99, 235, 0.42); }
.btn-ghost { background: rgba(255, 255, 255, 0.7); }
.btn-light { background: #fff; color: #0d47c4; border: none; box-shadow: 0 12px 30px rgba(4, 20, 70, 0.35); }
.btn-light:hover { box-shadow: 0 16px 40px rgba(4, 20, 70, 0.45); }
.btn-outline-light { background: rgba(255, 255, 255, 0.08); color: #fff; border: 1px solid rgba(255, 255, 255, 0.55); }
.btn-outline-light:hover { background: rgba(255, 255, 255, 0.18); border-color: #fff; box-shadow: 0 12px 30px rgba(4, 20, 70, 0.3); }
.btn-sm { padding: 8px 14px; font-size: 13.5px; border-radius: 9px; }

.burger { display: none; background: rgba(255,255,255,0.1); border: 1px solid rgba(255, 255, 255, 0.4); border-radius: 9px; color: #fff; padding: 7px 10px; font-size: 16px; cursor: pointer; }

/* ---------------- 通用区块 ---------------- */
main { position: relative; z-index: 2; }
section { padding: 92px 0; position: relative; }
.sec-head { max-width: 720px; margin-bottom: 48px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; letter-spacing: 0.18em; color: var(--blue);
  font-family: var(--mono); text-transform: uppercase; margin-bottom: 14px;
  background: rgba(37, 99, 235, 0.07); border: 1px solid rgba(37, 99, 235, 0.18);
  padding: 4px 12px 4px 10px; border-radius: 999px;
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--blue); }
.sec-title { font-size: clamp(26px, 3.4vw, 40px); color: var(--text); }
.sec-title em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.sec-desc { color: var(--text-dim); margin-top: 16px; font-size: 15.5px; }

.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; transition: 0.28s; position: relative; overflow: hidden;
  box-shadow: 0 6px 20px rgba(15, 30, 60, 0.05);
}
.card::after {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius); pointer-events: none;
  background: linear-gradient(115deg, transparent 40%, rgba(255,255,255,0.85) 50%, transparent 60%);
  opacity: 0; transform: translateX(-30%); transition: 0.55s;
}
.card:hover { transform: translateY(-5px); border-color: rgba(37, 99, 235, 0.35); box-shadow: var(--shadow); }
.card:hover::after { opacity: 1; transform: translateX(30%); }

.tag {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px;
  border: 1px solid var(--line-strong); color: var(--text-dim); background: #fff;
}

/* 渐显动画 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------------- Hero（深蓝科技大横幅） ---------------- */
.hero-blue {
  position: relative; overflow: hidden;
  padding: 46px 0 60px;
  background:
    radial-gradient(900px 460px at 18% 10%, rgba(56, 130, 246, 0.5), transparent 62%),
    radial-gradient(760px 420px at 85% 90%, rgba(37, 99, 235, 0.45), transparent 65%),
    linear-gradient(118deg, #0a2f9e 0%, #0d47c4 48%, #082f8f 100%);
}
.hero-blue::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 85%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 85%);
}
.circuit { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.55; }
.hero-slogan {
  position: relative; z-index: 2; text-align: center;
  color: #cfe2ff; font-size: clamp(15px, 1.8vw, 19px); letter-spacing: 0.14em;
  margin-bottom: 34px;
}
.hero-slogan b { color: #fff; }
.hero-grid2 {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 0.92fr 1.08fr; gap: 36px; align-items: center;
}
.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; display: block; filter: drop-shadow(0 34px 60px rgba(2, 12, 55, 0.55)); }
.art-float { animation: artfloat 6.5s ease-in-out infinite; }
@keyframes artfloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-13px); } }

.hero-title {
  font-size: clamp(36px, 5.4vw, 66px); color: #fff; letter-spacing: 0.01em;
  text-shadow: 0 4px 0 rgba(10, 40, 120, 0.45), 0 14px 44px rgba(2, 12, 55, 0.6);
}
.hero-sub2 {
  color: #d9e8ff; font-size: clamp(17px, 2.2vw, 26px); margin-top: 14px; letter-spacing: 0.1em;
}
.hero-desc { color: rgba(255, 255, 255, 0.78); margin-top: 18px; max-width: 540px; font-size: 15.5px; line-height: 1.9; }
.hero-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.hero-trust { display: flex; gap: 16px; margin-top: 26px; flex-wrap: wrap; }
.hero-trust span {
  display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 6px 13px; border-radius: 999px;
}
.hero-trust i { width: 6px; height: 6px; border-radius: 50%; background: #6ee7b7; box-shadow: 0 0 10px rgba(110, 231, 183, 0.9); }

/* 四个圆形能力图标 */
.orb-row {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  margin-top: 52px; max-width: 980px; margin-left: auto; margin-right: auto;
}
.orb {
  aspect-ratio: 1; border-radius: 50%; padding: 16px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  text-align: center; color: #fff;
  background: radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.04) 68%);
  border: 1px solid rgba(160, 205, 255, 0.45);
  box-shadow:
    0 0 0 12px rgba(255, 255, 255, 0.045),
    inset 0 0 34px rgba(120, 180, 255, 0.18),
    0 20px 44px rgba(3, 15, 60, 0.45);
  transition: 0.3s;
}
.orb:hover { transform: translateY(-7px); border-color: #9fd4ff; box-shadow: 0 0 0 12px rgba(255,255,255,0.07), inset 0 0 40px rgba(140,195,255,0.3), 0 26px 54px rgba(3,15,60,0.55); }
.orb .oi {
  width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center;
  font-size: 24px; background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.35); margin-bottom: 4px;
}
.orb b { font-size: 15px; font-weight: 700; }
.orb span { font-size: 12.5px; color: #cfe2ff; line-height: 1.5; }

/* ---------------- 统计条 ---------------- */
.stats {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(255,255,255,0.95), rgba(238,244,255,0.95));
}
.stats-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 34px 10px; text-align: center; border-right: 1px solid var(--line); }
.stat:last-child { border-right: none; }
.stat b { font-size: 34px; font-family: var(--mono); background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat b small { font-size: 20px; }
.stat span { display: block; color: var(--text-faint); font-size: 13.5px; margin-top: 4px; }

/* ---------------- 技术栈走马灯 ---------------- */
.techbar {
  border-bottom: 1px solid var(--line); overflow: hidden;
  background: rgba(255, 255, 255, 0.72); padding: 12px 0;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.techbar .track {
  display: flex; gap: 34px; width: max-content;
  animation: marquee 32s linear infinite;
}
.techbar:hover .track { animation-play-state: paused; }
.techbar .track span {
  font-family: var(--mono); font-size: 13px; color: var(--text-dim);
  display: inline-flex; align-items: center; gap: 9px; white-space: nowrap;
}
.techbar .track span::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--grad); box-shadow: 0 0 8px rgba(37, 99, 235, 0.5);
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------------- 能力 ---------------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cap .ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  font-size: 21px; background: linear-gradient(140deg, rgba(37,99,235,0.10), rgba(8,145,178,0.12));
  border: 1px solid rgba(37, 99, 235, 0.22); margin-bottom: 16px;
}
.cap h3 { font-size: 17px; margin-bottom: 8px; color: var(--text); }
.cap p { color: var(--text-dim); font-size: 14.5px; }

/* ---------------- 产品卡 ---------------- */
.prod {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); background: #fff; transition: 0.3s;
  box-shadow: 0 6px 20px rgba(15, 30, 60, 0.05);
}
.prod::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: 0.35s;
  background: radial-gradient(560px 220px at 20% 0%, var(--accent, #2563eb), transparent 70%);
}
.prod::after {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px;
  background: var(--accent, #2563eb); opacity: 0; transition: 0.3s;
}
.prod:hover { transform: translateY(-6px); border-color: var(--accent, #2563eb); box-shadow: var(--shadow-lg); }
.prod:hover::before { opacity: 0.07; }
.prod:hover::after { opacity: 1; }
.prod-in { position: relative; padding: 30px; display: grid; grid-template-columns: 62px 1fr; gap: 20px; }
.prod .pico {
  width: 62px; height: 62px; border-radius: 15px; display: grid; place-items: center; font-size: 28px;
  background: #fff; border: 1px solid var(--line-strong); color: var(--accent, #2563eb);
  box-shadow: 0 6px 16px rgba(15, 30, 60, 0.06);
}
.prod h3 { font-size: 22px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; color: var(--text); }
.prod .badge { font-size: 11.5px; padding: 2px 9px; border-radius: 999px; background: rgba(255,255,255,0.9); color: var(--accent, #2563eb); border: 1px solid var(--accent, #2563eb); }
.prod .sub { color: var(--accent, #2563eb); font-size: 13.5px; margin-top: 6px; font-family: var(--mono); }
.prod .sum { color: var(--text-dim); margin-top: 14px; font-size: 14.5px; }
.prod ul { margin-top: 16px; display: grid; gap: 9px; }
.prod ul li { display: flex; gap: 9px; font-size: 14px; color: var(--text-dim); }
.prod ul li::before { content: "▸"; color: var(--accent, #2563eb); }
.prod .go { margin-top: 22px; display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--accent, #2563eb); }

/* ---------------- 技术架构 ---------------- */
.tech-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
.layer {
  border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px;
  background: #fff; margin-bottom: 12px; position: relative; overflow: hidden;
  box-shadow: 0 6px 18px rgba(15, 30, 60, 0.05); transition: 0.25s;
}
.layer::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--grad);
}
.layer:hover { transform: translateX(4px); box-shadow: var(--shadow); }
.layer b { font-family: var(--mono); font-size: 13px; color: var(--blue); letter-spacing: 0.08em; }
.layer p { color: var(--text-dim); font-size: 14px; margin-top: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 9px; }
.chip {
  padding: 7px 13px; border-radius: 999px; font-size: 13px; border: 1px solid var(--line-strong);
  background: #fff; color: var(--text-dim); transition: 0.2s;
}
.chip:hover { border-color: rgba(37, 99, 235, 0.45); color: var(--blue); }
.chip.hot {
  border-color: rgba(37, 99, 235, 0.35); color: var(--blue);
  background: linear-gradient(120deg, rgba(8,145,178,0.08), rgba(37,99,235,0.08));
}

/* ---------------- 交付流程 ---------------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.step {
  position: relative; padding: 24px 18px; border: 1px solid var(--line); border-radius: 14px;
  background: #fff; box-shadow: 0 6px 18px rgba(15, 30, 60, 0.05); transition: 0.25s;
}
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.step .no {
  font-family: var(--mono); font-size: 26px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  opacity: 0.85;
}
.step h4 { font-size: 16px; margin: 8px 0 8px; color: var(--text); }
.step p { font-size: 13.5px; color: var(--text-dim); }
.step::after {
  content: ""; position: absolute; right: -8px; top: 50%; width: 8px; height: 1px; background: var(--line-strong);
}
.step:last-child::after { display: none; }

/* ---------------- FAQ ---------------- */
.faq { display: grid; gap: 12px; max-width: 900px; }
.faq details {
  border: 1px solid var(--line); border-radius: 13px; background: #fff; padding: 0 20px;
  transition: 0.25s; box-shadow: 0 6px 18px rgba(15, 30, 60, 0.04);
}
.faq details[open] { border-color: rgba(37, 99, 235, 0.4); box-shadow: var(--shadow); }
.faq summary {
  cursor: pointer; padding: 18px 0; font-weight: 600; font-size: 15.5px; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; color: var(--text);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--blue); font-size: 20px; font-family: var(--mono); }
.faq details[open] summary::after { content: "−"; }
.faq .a { padding: 0 0 18px; color: var(--text-dim); font-size: 14.5px; }

/* ---------------- CTA 留资 ---------------- */
.cta-box {
  border: 1px solid rgba(37, 99, 235, 0.22); border-radius: 22px; padding: 44px;
  background: linear-gradient(140deg, #ffffff 0%, #f2f6ff 45%, #eef4ff 100%);
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.cta-box::before {
  content: ""; position: absolute; width: 420px; height: 420px; right: -140px; top: -180px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.16), transparent 65%);
}
.form { display: grid; gap: 13px; position: relative; }
.field { display: grid; gap: 6px; }
.field label { font-size: 13px; color: var(--text-dim); font-weight: 500; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border-radius: 11px; font-size: 14.5px; font-family: inherit;
  background: #fff; border: 1px solid var(--line-strong); color: var(--text); outline: none;
  transition: 0.2s;
}
.field input::placeholder, .field textarea::placeholder { color: #9aa8bd; }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.field textarea { resize: vertical; min-height: 92px; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; }
.form-note { font-size: 12.5px; color: var(--text-faint); }
.form-msg { font-size: 13.5px; min-height: 20px; }
.form-msg.ok { color: var(--green); } .form-msg.err { color: #dc2626; }

/* ---------------- 页脚（深蓝科技风） ---------------- */
footer.foot {
  border-top: none;
  background:
    radial-gradient(700px 300px at 85% 0%, rgba(59, 130, 246, 0.25), transparent 65%),
    linear-gradient(180deg, #0c2f7e, #081d52);
  color: rgba(255, 255, 255, 0.82);
  padding: 54px 0 26px; margin-top: 20px;
}
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 30px; }
.foot h5 { font-size: 14px; margin-bottom: 14px; color: #fff; }
.foot ul li { font-size: 13.5px; color: rgba(255, 255, 255, 0.68); padding: 4px 0; }
.foot ul li a:hover { color: #7cc4ff; }
.foot .chips .chip { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.25); color: rgba(255, 255, 255, 0.85); }
.foot .chips .chip.hot { border-color: rgba(124, 196, 255, 0.55); color: #9fd4ff; }
.foot p { color: rgba(255, 255, 255, 0.6) !important; }
.foot-bottom { border-top: 1px solid rgba(255, 255, 255, 0.14); margin-top: 34px; padding-top: 20px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12.5px; color: rgba(255, 255, 255, 0.5); }

/* ---------------- 咨询悬浮按钮 ---------------- */
.chat-fab {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  width: 58px; height: 58px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--grad); color: #fff; font-size: 22px; display: grid; place-items: center;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.38); transition: 0.25s;
}
.chat-fab:hover { transform: scale(1.07); }
.chat-fab .dot {
  position: absolute; top: 4px; right: 4px; width: 13px; height: 13px; border-radius: 50%;
  background: #f43f5e; border: 2px solid #fff;
}
.chat-fab.pulse { animation: fabpulse 2.6s infinite; }
@keyframes fabpulse {
  0%,100% { box-shadow: 0 12px 30px rgba(37,99,235,0.38); }
  50% { box-shadow: 0 12px 44px rgba(37,99,235,0.62); }
}

.chat-panel {
  position: fixed; right: 22px; bottom: 92px; z-index: 91; width: 372px; max-width: calc(100vw - 32px);
  height: 520px; max-height: calc(100vh - 130px); display: none; flex-direction: column;
  border: 1px solid var(--line-strong); border-radius: 18px; overflow: hidden;
  background: #fff; box-shadow: var(--shadow-lg);
}
.chat-panel.open { display: flex; animation: pop 0.24s ease; }
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(0.97); } }
.chat-head {
  display: flex; align-items: center; gap: 12px; padding: 15px 16px; border-bottom: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(8, 145, 178, 0.12), rgba(124, 58, 237, 0.10));
}
.chat-head .av { width: 38px; height: 38px; border-radius: 11px; background: var(--grad); color: #fff; display: grid; place-items: center; font-weight: 800; }
.chat-head .t b { display: block; font-size: 14.5px; color: var(--text); }
.chat-head .t span { font-size: 12px; color: var(--text-dim); display: flex; align-items: center; gap: 6px; }
.chat-head .t span i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px rgba(5,150,105,0.6); }
.chat-head .x { margin-left: auto; background: none; border: none; color: var(--text-faint); font-size: 20px; cursor: pointer; line-height: 1; }

.chat-body { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; background: #f8fafd; }
.chat-body::-webkit-scrollbar { width: 6px; }
.chat-body::-webkit-scrollbar-thumb { background: rgba(15, 23, 42, 0.18); border-radius: 3px; }
.bubble { max-width: 82%; padding: 10px 13px; border-radius: 13px; font-size: 14px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.bubble.agent { align-self: flex-start; background: #fff; border: 1px solid var(--line); color: var(--text); border-bottom-left-radius: 4px; box-shadow: 0 4px 12px rgba(15,30,60,0.05); }
.bubble.visitor { align-self: flex-end; background: var(--grad); color: #fff; border-bottom-right-radius: 4px; box-shadow: 0 8px 20px rgba(37,99,235,0.22); }
.bubble .tm { display: block; font-size: 11px; margin-top: 4px; color: var(--text-faint); }
.bubble.visitor .tm { color: rgba(255,255,255,0.82); }
.chat-sys { align-self: center; font-size: 12px; color: var(--text-faint); background: rgba(15,23,42,0.05); padding: 4px 12px; border-radius: 999px; }

.quick { display: flex; gap: 8px; flex-wrap: wrap; padding: 10px 16px; background: #fff; }
.quick button {
  font-size: 12.5px; padding: 6px 11px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line-strong); background: #fff; color: var(--text-dim); transition: 0.2s;
}
.quick button:hover { color: var(--blue); border-color: var(--blue); background: rgba(37,99,235,0.06); }

.chat-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 0 16px 10px; background: #fff; }
.chat-meta input {
  padding: 8px 11px; font-size: 13px; border-radius: 9px; font-family: inherit;
  background: #fff; border: 1px solid var(--line-strong); color: var(--text); outline: none;
}
.chat-meta input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12); }

.chat-foot { border-top: 1px solid var(--line); padding: 12px; display: flex; gap: 9px; align-items: flex-end; background: #fff; }
.chat-foot textarea {
  flex: 1; resize: none; height: 44px; max-height: 120px; padding: 11px 13px; font-size: 14px; font-family: inherit;
  border-radius: 12px; background: #fff; border: 1px solid var(--line-strong); color: var(--text); outline: none;
}
.chat-foot textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12); }
.chat-foot button {
  height: 44px; padding: 0 18px; border-radius: 12px; border: none; cursor: pointer;
  background: var(--grad); color: #fff; font-weight: 700; font-size: 14px;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}

/* ---------------- 产品详情页 ---------------- */
.pd-hero { padding: 56px 0 34px; }
.pd-top { display: grid; grid-template-columns: 82px 1fr auto; gap: 22px; align-items: center; }
.pd-top .pico { width: 82px; height: 82px; border-radius: 20px; display: grid; place-items: center; font-size: 40px; background: #fff; border: 1px solid var(--line-strong); color: var(--accent, #2563eb); box-shadow: 0 10px 26px rgba(15,30,60,0.08); }
.pd-top h1 { font-size: clamp(28px, 4vw, 44px); color: var(--text); }
.pd-top .sub { color: var(--accent, #2563eb); font-family: var(--mono); font-size: 14px; margin-top: 8px; }
.crumb { font-size: 13px; color: var(--text-faint); margin-bottom: 22px; }
.crumb a:hover { color: var(--blue); }
.pd-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.mod { border: 1px solid var(--line); border-radius: 14px; padding: 20px; background: #fff; transition: 0.25s; box-shadow: 0 6px 18px rgba(15,30,60,0.05); }
.mod:hover { border-color: var(--accent, #2563eb); transform: translateY(-3px); box-shadow: var(--shadow); }
.mod h4 { font-size: 15.5px; display: flex; align-items: center; gap: 9px; color: var(--text); }
.mod h4::before { content: "▣"; color: var(--accent, #2563eb); font-size: 13px; }
.mod p { color: var(--text-dim); font-size: 13.8px; margin-top: 7px; }
.hl { display: grid; gap: 12px; }
.hl li { display: flex; gap: 12px; padding: 15px 18px; border: 1px solid var(--line); border-radius: 13px; background: #fff; font-size: 14.5px; color: var(--text-dim); box-shadow: 0 6px 18px rgba(15,30,60,0.04); }
.hl li::before { content: "✓"; color: var(--green); font-weight: 700; }
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
  .scene-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-links.show {
    display: flex; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column;
    background: #0a2f9e; border-bottom: 1px solid rgba(255,255,255,0.15); padding: 12px;
    box-shadow: 0 24px 44px rgba(6, 24, 80, 0.4);
  }
  .burger { display: block; margin-left: auto; }
  .nav-cta { display: none; }
  .hero-grid, .hero-grid2, .tech-wrap, .cta-box { grid-template-columns: 1fr; }
  .hero-art { max-width: 480px; margin: 0 auto; order: 2; }
  .orb-row { grid-template-columns: repeat(2, 1fr); gap: 18px; max-width: 560px; }
  .grid-3 { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: none; }
  .pd-grid { grid-template-columns: 1fr; }
  .pd-top { grid-template-columns: 64px 1fr; }
  .pd-top .pico { width: 64px; height: 64px; font-size: 30px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  section { padding: 64px 0; }
  .cta-box { padding: 28px; }
}
@media (max-width: 560px) {
  .steps { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr; }
  .prod-in { grid-template-columns: 1fr; }
  .chat-panel { right: 8px; left: 8px; width: auto; bottom: 84px; }
  .hero-badges { gap: 12px; }
}