/* ============================================================
   星耀锦程官网 样式表
   深蓝科技感 + 青色光效 + 星耀粉点缀
   ============================================================ */

:root {
  --navy-900: #050a1c;
  --navy-800: #080f29;
  --navy-700: #0d1740;
  --navy-600: #15245a;
  --cyan: #37e0ff;
  --blue: #4d8bff;
  --pink: #e84f9b;
  --pink-soft: #f37bb6;
  --gold: #f3c56b;
  --ink: #182440;
  --ink-2: #37425a;
  --gray: #647089;
  --line: #e6ebf5;
  --bg-light: #f4f7fd;
  --white: #ffffff;

  --grad-brand: linear-gradient(120deg, #2fd6ff 0%, #4d8bff 48%, #e84f9b 100%);
  --grad-text: linear-gradient(120deg, #8ff0ff 0%, #7db4ff 45%, #ff7fc1 100%);
  --shadow-card: 0 18px 50px -22px rgba(24, 36, 64, .18);
  --shadow-card-hover: 0 30px 70px -24px rgba(55, 224, 255, .45);
  --radius: 18px;
  --header-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(232, 79, 155, .25); }

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { width: min(1200px, calc(100% - 32px)); margin: 0 auto; }
.container.narrow { width: min(860px, calc(100% - 32px)); }

/* PC 端为右侧浮动导航预留安全间距 */
@media (min-width: 769px) {
  .container { width: min(1180px, calc(100% - 136px)); }
  .container.narrow { width: min(860px, calc(100% - 136px)); }
}

/* ---------------- 加载动画 ---------------- */
#loader {
  position: fixed; inset: 0; z-index: 9999;
  background: radial-gradient(circle at 50% 42%, #0e1a44 0%, var(--navy-900) 70%);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .6s ease, visibility .6s ease;
}
#loader.hide { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-inner { text-align: center; }
.loader-logo {
  width: 96px; margin: 0 auto 18px;
  filter: drop-shadow(0 0 26px rgba(232, 79, 155, .55));
  animation: loaderPulse 1.6s ease-in-out infinite;
}
.loader-name {
  color: #fff; font-size: 20px; letter-spacing: .5em; text-indent: .5em;
  font-weight: 600; margin-bottom: 22px;
}
.loader-bar {
  width: 180px; height: 3px; margin: 0 auto;
  background: rgba(255, 255, 255, .12); border-radius: 99px; overflow: hidden;
}
.loader-bar span {
  display: block; height: 100%; width: 40%; border-radius: 99px;
  background: var(--grad-brand);
  animation: loaderBar 1.2s ease-in-out infinite;
}
@keyframes loaderPulse {
  0%, 100% { transform: scale(1); opacity: .9; }
  50% { transform: scale(1.08); opacity: 1; }
}
@keyframes loaderBar {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(380%); }
}

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  height: var(--header-h);
  transition: background .35s ease, box-shadow .35s ease, backdrop-filter .35s ease;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, .82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: 0 6px 30px -12px rgba(13, 23, 64, .25);
}
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }

.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { width: 40px; height: 40px; object-fit: contain; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 17px; color: #fff; letter-spacing: 2px; transition: color .35s; }
.brand-text em {
  font-style: normal; font-size: 9px; letter-spacing: 2.4px;
  color: rgba(255, 255, 255, .55); transition: color .35s;
}
.site-header.scrolled .brand-text strong { color: var(--ink); }
.site-header.scrolled .brand-text em { color: var(--gray); }

.main-nav { display: flex; gap: 6px; }
.nav-link {
  position: relative; padding: 8px 16px; border-radius: 99px;
  font-size: 15px; color: rgba(255, 255, 255, .85);
  transition: color .3s, background .3s;
}
.nav-link::after {
  content: ""; position: absolute; left: 50%; bottom: 2px;
  width: 0; height: 2px; border-radius: 2px;
  background: var(--grad-brand);
  transition: width .3s ease, left .3s ease;
}
.nav-link:hover { color: #fff; }
.nav-link.active { color: #fff; }
.nav-link.active::after { width: 22px; left: calc(50% - 11px); }
.site-header.scrolled .nav-link { color: var(--ink-2); }
.site-header.scrolled .nav-link:hover,
.site-header.scrolled .nav-link.active { color: var(--blue); }

.nav-toggle {
  display: none; width: 42px; height: 42px; flex-direction: column;
  align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; border-radius: 2px;
  background: #fff; transition: background .3s, transform .3s, opacity .3s;
}
.site-header.scrolled .nav-toggle span { background: var(--ink); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------------- 右侧浮动导航 ---------------- */
.float-nav {
  position: fixed; right: 18px; top: 50%; transform: translateY(-50%);
  z-index: 800; display: flex; flex-direction: column; gap: 10px;
}
.float-link {
  position: relative; width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #c9d8f5;
  background: rgba(10, 18, 46, .55);
  border: 1px solid rgba(120, 160, 255, .22);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  transition: color .25s, border-color .25s, background .25s, transform .25s, box-shadow .25s;
}
.float-link svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.float-link:hover {
  color: var(--cyan); transform: translateX(-3px);
  border-color: rgba(55, 224, 255, .6);
  box-shadow: 0 0 22px -4px rgba(55, 224, 255, .55);
}
.float-link.active {
  color: #06101f;
  background: var(--grad-brand);
  border-color: transparent;
  box-shadow: 0 6px 20px -6px rgba(77, 139, 255, .7);
}
.float-link.active:hover { transform: translateX(-3px); color: #06101f; }

/* tooltip */
.float-link::before {
  content: attr(data-tip);
  position: absolute; right: calc(100% + 12px); top: 50%; transform: translateY(-50%) translateX(6px);
  background: rgba(8, 15, 41, .92); color: #fff;
  font-size: 12px; letter-spacing: 1px; white-space: nowrap;
  padding: 5px 11px; border-radius: 8px;
  border: 1px solid rgba(120, 160, 255, .25);
  opacity: 0; pointer-events: none;
  transition: opacity .22s, transform .22s;
}
.float-link:hover::before { opacity: 1; transform: translateY(-50%) translateX(0); }

.float-top { opacity: 0; pointer-events: none; transform: translateY(8px); }
.float-nav.show-top .float-top { opacity: 1; pointer-events: auto; transform: translateY(0); }
.float-nav.show-top .float-top:hover { transform: translateY(-3px); }

.float-fab { display: none; }

/* ---------------- 通用板块 ---------------- */
.section { padding: 110px 0; position: relative; scroll-margin-top: var(--header-h); }
#hero { scroll-margin-top: 0; }

.sec-head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.sec-eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: 4px;
  font-weight: 700; color: var(--blue);
  margin-bottom: 14px;
}
.sec-eyebrow.light { color: var(--cyan); }
.sec-title {
  font-size: 38px; font-weight: 800; color: var(--ink);
  letter-spacing: 1px; position: relative; padding-bottom: 18px;
}
.sec-title::after {
  content: ""; position: absolute; left: 50%; bottom: 0;
  width: 56px; height: 3px; border-radius: 3px;
  transform: translateX(-50%);
  background: var(--grad-brand);
}
.sec-title.light { color: #fff; }
.sec-desc { margin-top: 16px; color: var(--gray); font-size: 16px; }
.sec-desc.light { color: rgba(220, 230, 255, .72); }

/* 滚动渐入 */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }
.delay-1 { transition-delay: .12s; }
.delay-2 { transition-delay: .24s; }
.delay-3 { transition-delay: .36s; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-block; padding: 14px 34px; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: 1px;
  transition: transform .25s, box-shadow .25s, background .25s, border-color .25s;
}
.btn-primary {
  color: #fff; background: var(--grad-brand);
  box-shadow: 0 12px 30px -10px rgba(77, 139, 255, .65);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 18px 38px -10px rgba(232, 79, 155, .55); }
.btn-ghost {
  color: #fff; border: 1px solid rgba(255, 255, 255, .4);
  background: rgba(255, 255, 255, .04);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-3px); }

/* ---------------- Hero ---------------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: calc(var(--header-h) + 40px) 0 90px;
  background:
    radial-gradient(1000px 600px at 78% -10%, rgba(77, 139, 255, .28), transparent 60%),
    radial-gradient(900px 700px at 12% 110%, rgba(232, 79, 155, .18), transparent 60%),
    linear-gradient(165deg, var(--navy-800) 0%, var(--navy-900) 55%, #04070f 100%);
  overflow: hidden;
}
.particles { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(120, 160, 255, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, .07) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 42%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 75% 65% at 50% 42%, #000 30%, transparent 75%);
}
.hero-glow {
  position: absolute; z-index: 0; width: 520px; height: 520px; border-radius: 50%;
  pointer-events: none; opacity: .5;
  background: radial-gradient(circle, rgba(55, 224, 255, .14) 0%, rgba(232, 79, 155, .08) 40%, transparent 68%);
  transform: translate(-50%, -50%);
  transition: opacity .4s;
}
.hero-inner { position: relative; z-index: 2; text-align: center; }

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  color: rgba(220, 232, 255, .85); font-size: 14px; letter-spacing: 2px;
  padding: 8px 20px; border-radius: 99px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(120, 160, 255, .25);
  margin-bottom: 30px;
}
.hero-eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: blink 1.8s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

.hero-title {
  font-size: clamp(38px, 6.4vw, 70px);
  font-weight: 800; color: #fff;
  line-height: 1.22; letter-spacing: 3px;
}
.hero-title .line { display: block; }
.hero-title .grad {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-sub {
  margin: 28px auto 0; max-width: 760px;
  color: rgba(220, 230, 255, .78);
  font-size: clamp(15px, 1.6vw, 18px); line-height: 2;
}
.hero-cta { margin-top: 42px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.hero-tags {
  margin-top: 34px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
}
.hero-tags span {
  font-size: 13px; color: rgba(200, 216, 250, .8);
  padding: 6px 16px; border-radius: 99px;
  border: 1px solid rgba(120, 160, 255, .22);
  background: rgba(255, 255, 255, .03);
}

.scroll-hint {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  z-index: 2;
}
.mouse {
  display: block; width: 24px; height: 38px; border-radius: 14px;
  border: 2px solid rgba(255, 255, 255, .45);
  display: flex; justify-content: center; padding-top: 7px;
}
.mouse span {
  width: 4px; height: 8px; border-radius: 4px;
  background: var(--cyan);
  animation: wheel 1.5s ease-in-out infinite;
}
@keyframes wheel { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(10px); opacity: 0; } 100% { opacity: 0; } }

/* ---------------- 关于我们 ---------------- */
.about { background: var(--bg-light); }
.about-grid {
  display: grid; grid-template-columns: 1.45fr 1fr;
  gap: 56px; align-items: start;
}
.about-text p { color: var(--ink-2); margin-bottom: 18px; font-size: 16px; }
.about-text .about-closing {
  margin-top: 22px; padding: 20px 24px;
  border-left: 3px solid var(--pink);
  background: #fff; border-radius: 0 12px 12px 0;
  box-shadow: var(--shadow-card);
}
.about-closing strong { color: var(--ink); }

.about-pillars { display: grid; gap: 16px; margin: 22px 0; }
.pillar {
  background: #fff; border-radius: var(--radius);
  padding: 24px 26px; box-shadow: var(--shadow-card);
  border: 1px solid var(--line);
  position: relative; overflow: hidden;
  transition: transform .3s, box-shadow .3s;
}
.pillar::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--grad-brand);
}
.pillar:nth-child(2)::before { background: linear-gradient(180deg, var(--pink), var(--gold)); }
.pillar:hover { transform: translateY(-4px); box-shadow: 0 24px 50px -22px rgba(24, 36, 64, .28); }
.pillar-icon {
  font-size: 18px; color: var(--pink);
  background: rgba(232, 79, 155, .08);
  width: 38px; height: 38px; border-radius: 10px;
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
}
.pillar h3 { font-size: 18px; color: var(--ink); margin-bottom: 8px; letter-spacing: 1px; }
.pillar p { font-size: 14.5px; color: var(--gray); margin: 0; }

.about-side {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  position: sticky; top: calc(var(--header-h) + 24px);
}
.stat-card {
  background: #fff; border-radius: var(--radius);
  padding: 28px 18px; text-align: center;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  transition: transform .3s, border-color .3s;
}
.stat-card:hover { transform: translateY(-5px); border-color: rgba(77, 139, 255, .4); }
.stat-num {
  font-size: 42px; font-weight: 800; line-height: 1.1;
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  display: flex; align-items: baseline; justify-content: center; gap: 3px;
  font-variant-numeric: tabular-nums;
}
.stat-num em {
  font-style: normal; font-size: 18px; font-weight: 700;
  -webkit-text-fill-color: var(--pink);
}
.stat-label { margin-top: 10px; font-size: 13px; color: var(--gray); letter-spacing: .5px; }

/* ---------------- 业务板块 ---------------- */
.business {
  background:
    radial-gradient(900px 500px at 85% 0%, rgba(77, 139, 255, .16), transparent 60%),
    radial-gradient(800px 600px at 8% 100%, rgba(232, 79, 155, .12), transparent 60%),
    linear-gradient(170deg, var(--navy-800) 0%, var(--navy-900) 100%);
}
.biz-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 26px; align-items: stretch;
}
.biz-card {
  position: relative;
  display: flex; flex-direction: column;
  padding: 36px 30px 30px;
  border-radius: 20px;
  background: linear-gradient(165deg, rgba(255, 255, 255, .075), rgba(255, 255, 255, .02));
  border: 1px solid rgba(140, 175, 255, .16);
  transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
  overflow: hidden;
}
.biz-card::after {
  content: ""; position: absolute; top: 0; left: 12%; right: 12%; height: 2px;
  background: var(--grad-brand);
  transform: scaleX(0); transform-origin: left;
  transition: transform .4s ease;
}
.biz-card:hover {
  transform: translateY(-10px);
  border-color: rgba(55, 224, 255, .5);
  box-shadow: var(--shadow-card-hover);
}
.biz-card:hover::after { transform: scaleX(1); }

.biz-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.biz-icon {
  width: 54px; height: 54px; border-radius: 14px; font-size: 26px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(140, 175, 255, .2);
}
.biz-index {
  font-size: 40px; font-weight: 800; font-style: italic;
  color: transparent;
  -webkit-text-stroke: 1px rgba(140, 175, 255, .35);
}
.biz-title { color: #fff; font-size: 21px; letter-spacing: 1px; margin-bottom: 12px; }
.biz-lead { color: rgba(214, 226, 250, .78); font-size: 14.5px; margin-bottom: 18px; }

.biz-list, .biz-steps { margin-bottom: 18px; display: grid; gap: 12px; }
.biz-list li {
  position: relative; padding-left: 18px;
  color: rgba(214, 226, 250, .7); font-size: 14px; line-height: 1.7;
}
.biz-list li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 7px; height: 7px; border-radius: 2px;
  background: var(--grad-brand);
}
.biz-list strong, .biz-steps strong { color: #dce7ff; font-weight: 600; }
.biz-steps { counter-reset: step; }
.biz-steps li {
  position: relative; padding-left: 40px;
  color: rgba(214, 226, 250, .7); font-size: 14px; line-height: 1.7;
  min-height: 28px;
}
.biz-steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 2px;
  width: 26px; height: 26px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; font-style: normal;
  color: var(--cyan);
  background: rgba(55, 224, 255, .08);
  border: 1px solid rgba(55, 224, 255, .35);
}
.biz-note {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px dashed rgba(140, 175, 255, .2);
  color: rgba(180, 200, 240, .62); font-size: 13px; line-height: 1.75;
}

/* ---------------- 行业解决方案 ---------------- */
.solutions { background: var(--bg-light); }
.sol-list { display: grid; gap: 28px; }
.sol-card {
  display: grid; grid-template-columns: 320px 1fr;
  background: #fff; border-radius: 22px; overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line);
  transition: transform .35s ease, box-shadow .35s ease;
}
.sol-card:hover { transform: translateY(-6px); box-shadow: 0 30px 70px -28px rgba(24, 36, 64, .3); }

.sol-aside {
  padding: 40px 32px; color: #fff;
  display: flex; flex-direction: column; justify-content: center;
  position: relative; overflow: hidden;
}
.sol-a { background: linear-gradient(155deg, #f263a9 0%, #d4408a 55%, #b02d70 100%); }
.sol-b { background: linear-gradient(155deg, #3f7dff 0%, #2b5fe0 55%, #1d3fa8 100%); }
.sol-c { background: linear-gradient(155deg, #e7b45a 0%, #cf9438 55%, #a8751f 100%); }
.sol-aside::after {
  content: ""; position: absolute; right: -50px; bottom: -50px;
  width: 180px; height: 180px; border-radius: 50%;
  background: rgba(255, 255, 255, .1);
}
.sol-emoji {
  font-size: 44px; width: 76px; height: 76px; border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, .18);
  margin-bottom: 20px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .25);
}
.sol-aside h3 { font-size: 22px; letter-spacing: 1px; margin-bottom: 12px; line-height: 1.4; }
.sol-aside p { font-size: 13.5px; line-height: 1.8; opacity: .9; }
.sol-tag {
  align-self: flex-start; margin-top: 20px;
  font-size: 12px; letter-spacing: 2px;
  padding: 5px 14px; border-radius: 99px;
  background: rgba(255, 255, 255, .2);
  border: 1px solid rgba(255, 255, 255, .35);
}

.sol-body { padding: 38px 40px; }
.sol-overview { color: var(--ink-2); font-size: 15px; margin-bottom: 24px; }
.sol-overview strong { color: var(--ink); }
.sol-sub {
  font-size: 14px; letter-spacing: 2px; color: var(--blue);
  margin-bottom: 16px; padding-left: 12px;
  border-left: 3px solid var(--pink);
}
.scene-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 14px; margin-bottom: 24px;
}
.scene {
  padding: 16px 18px; border-radius: 12px;
  background: var(--bg-light);
  border: 1px solid var(--line);
  transition: border-color .25s, transform .25s, background .25s;
}
.scene:hover { border-color: rgba(77, 139, 255, .4); transform: translateY(-2px); background: #fbfdff; }
.scene-mark {
  display: inline-block; font-size: 14px; font-weight: 700;
  color: var(--ink); margin-bottom: 5px;
  padding-left: 14px; position: relative;
}
.scene-mark::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 8px rgba(232, 79, 155, .6);
}
.scene p { font-size: 13px; color: var(--gray); line-height: 1.65; }

.sol-service {
  display: grid; gap: 8px;
  padding: 18px 22px; border-radius: 12px;
  background: linear-gradient(120deg, rgba(55, 224, 255, .07), rgba(232, 79, 155, .07));
  border: 1px solid rgba(77, 139, 255, .18);
  font-size: 13.5px; color: var(--ink-2); line-height: 1.75;
}
.sol-service strong { color: var(--ink); }

/* ---------------- FAQ ---------------- */
.faq {
  background:
    radial-gradient(800px 460px at 50% 0%, rgba(77, 139, 255, .14), transparent 60%),
    var(--navy-900);
}
.faq-list { display: grid; gap: 14px; }
.faq-item {
  border-radius: 14px; overflow: hidden;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(140, 175, 255, .16);
  transition: border-color .3s, background .3s;
}
.faq-item[open] {
  border-color: rgba(55, 224, 255, .45);
  background: rgba(255, 255, 255, .07);
}
.faq-item summary {
  list-style: none; cursor: pointer;
  padding: 20px 26px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  color: #eaf1ff; font-size: 16px; font-weight: 600;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon {
  position: relative; flex: none;
  width: 18px; height: 18px;
}
.faq-icon::before, .faq-icon::after {
  content: ""; position: absolute; top: 50%; left: 50%;
  width: 14px; height: 2px; border-radius: 2px;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: transform .3s;
}
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item[open] .faq-icon::after { transform: translate(-50%, -50%) rotate(0); }
.faq-answer { padding: 0 26px 22px; }
.faq-answer p { color: rgba(214, 226, 250, .72); font-size: 14.5px; line-height: 1.9; }

/* ---------------- 联系我们 ---------------- */
.contact { background: var(--bg-light); }
.contact-grid {
  display: grid; grid-template-columns: 1.3fr 1fr;
  gap: 32px; align-items: stretch;
}
.contact-info {
  background: #fff; border-radius: 22px;
  padding: 44px 48px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
}
.contact-company { font-size: 22px; color: var(--ink); letter-spacing: 1px; margin-bottom: 28px; }
.info-list { display: grid; gap: 22px; margin-bottom: 34px; }
.info-list li { display: flex; align-items: flex-start; gap: 16px; }
.info-icon {
  flex: none; width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(77, 139, 255, .09);
  color: var(--blue);
}
.info-icon svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.info-list em { font-style: normal; font-size: 13px; color: var(--gray); display: block; }
.info-list p { font-size: 16px; color: var(--ink); font-weight: 500; }
.info-list a { color: var(--blue); transition: color .2s; }
.info-list a:hover { color: var(--pink); }
.contact-btn { margin-top: 4px; }

.contact-qr { display: flex; }
.qr-card {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: linear-gradient(160deg, #fff 0%, #f7faff 100%);
  border-radius: 22px; padding: 40px 30px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  position: relative;
}
.qr-card::before {
  content: ""; position: absolute; inset: 10px;
  border-radius: 16px;
  border: 1px dashed rgba(232, 79, 155, .35);
  pointer-events: none;
}
.qr-card img {
  width: 230px; height: 230px; border-radius: 12px;
  box-shadow: 0 10px 30px -12px rgba(24, 36, 64, .25);
  margin-bottom: 20px;
}
.qr-card p { color: var(--ink); font-size: 16px; }
.qr-card .qr-sub { color: var(--gray); font-size: 13px; margin-top: 4px; }

/* ---------------- 页脚 ---------------- */
.site-footer {
  background: var(--navy-900);
  border-top: 1px solid rgba(140, 175, 255, .14);
  padding-top: 46px;
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 30px; padding-bottom: 34px;
  border-bottom: 1px solid rgba(140, 175, 255, .12);
}
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-logo { width: 46px; height: 46px; }
.footer-name { color: #fff; font-size: 16px; letter-spacing: 1px; font-weight: 600; }
.footer-meta { color: rgba(200, 216, 250, .55); font-size: 13px; margin-top: 2px; }
.footer-links { display: flex; gap: 26px; flex-wrap: wrap; }
.footer-links a { color: rgba(200, 216, 250, .65); font-size: 14px; transition: color .2s; }
.footer-links a:hover { color: var(--cyan); }
.footer-bottom {
  padding: 22px 0 26px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
  color: rgba(180, 200, 240, .5); font-size: 13px;
}
.footer-bottom a { color: rgba(180, 200, 240, .65); transition: color .2s; }
.footer-bottom a:hover { color: var(--cyan); }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .about-side { position: static; grid-template-columns: repeat(4, 1fr); }
  .biz-grid { grid-template-columns: 1fr; max-width: 640px; margin: 0 auto; }
  .biz-card { padding: 32px 28px; }
  .sol-card { grid-template-columns: 1fr; }
  .sol-aside { padding: 32px 28px; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 76px 0; }
  .sec-head { margin-bottom: 44px; }
  .sec-title { font-size: 29px; }

  /* 移动端导航 */
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: var(--header-h); right: 0;
    width: min(300px, 82vw); height: calc(100vh - var(--header-h));
    flex-direction: column; gap: 4px;
    padding: 24px 20px;
    background: rgba(255, 255, 255, .96);
    -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
    box-shadow: -10px 0 40px -12px rgba(13, 23, 64, .35);
    transform: translateX(105%);
    transition: transform .35s cubic-bezier(.22, .8, .36, 1);
  }
  .main-nav.open { transform: translateX(0); }
  .nav-link {
    color: var(--ink-2); font-size: 16px;
    padding: 13px 16px; border-radius: 12px;
  }
  .nav-link::after { display: none; }
  .nav-link.active { color: var(--blue); background: rgba(77, 139, 255, .08); }

  /* 顶部菜单遮罩 */
  .nav-mask {
    display: block; position: fixed; inset: 0; z-index: 850;
    background: rgba(4, 8, 20, .5);
    opacity: 0; pointer-events: none;
    transition: opacity .3s;
  }
  .nav-mask.show { opacity: 1; pointer-events: auto; }

  /* FAB 展开遮罩 */
  .float-mask {
    display: block; position: fixed; inset: 0; z-index: 750;
    background: rgba(4, 8, 20, .42);
    opacity: 0; pointer-events: none;
    transition: opacity .3s;
  }
  .float-mask.show { opacity: 1; pointer-events: auto; }

  /* FAB 安全区：静止阅读区域文字避开右下角 */
  .biz-note, .sol-service,
  .faq-item summary, .faq-answer { padding-right: 60px; }
  .section { padding: 84px 0; }

  /* 页底时 FAB 不压页脚文字 */
  .footer-links { padding-right: 60px; }
  .footer-bottom { padding-bottom: 92px; }

  /* 手机端“回到顶部”只在 FAB 菜单展开时出现 */
  .float-nav.show-top .float-top {
    opacity: 0; pointer-events: none;
    transform: translateY(14px) scale(.85);
  }
  .float-nav.open .float-top {
    opacity: 1; pointer-events: auto; transform: none;
  }

  /* 浮动导航收为右下角 FAB，链接向上弹出 */
  .float-nav {
    top: auto; bottom: 20px; right: 18px;
    transform: none;
    flex-direction: column; gap: 0;
    pointer-events: none; /* 容器本身不吞触摸，只放行可见子元素 */
  }
  .float-fab {
    display: flex; width: 50px; height: 50px; border-radius: 50%;
    align-items: center; justify-content: center;
    color: #fff; background: var(--grad-brand);
    box-shadow: 0 10px 28px -8px rgba(232, 79, 155, .6);
    z-index: 2; pointer-events: auto; position: relative;
    transition: transform .3s;
  }
  .float-nav.open .float-fab { transform: rotate(135deg); }
  .float-fab svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; }
  .float-link {
    position: absolute; right: 3px;
    opacity: 0; pointer-events: none;
    transform: translateY(14px) scale(.85);
    transition: opacity .25s ease, transform .25s ease;
  }
  /* 自下而上：回到顶部 → 联系 → 方案 → 业务 → 关于 → 首页 */
  .float-link:nth-child(1) { bottom: 344px; }
  .float-link:nth-child(2) { bottom: 288px; }
  .float-link:nth-child(3) { bottom: 232px; }
  .float-link:nth-child(4) { bottom: 176px; }
  .float-link:nth-child(5) { bottom: 120px; }
  .float-link:nth-child(6) { bottom: 64px; }
  .float-nav.open .float-link {
    opacity: 1; pointer-events: auto; transform: none;
  }
  .float-nav.open .float-link:nth-child(6) { transition-delay: .02s; }
  .float-nav.open .float-link:nth-child(5) { transition-delay: .05s; }
  .float-nav.open .float-link:nth-child(4) { transition-delay: .08s; }
  .float-nav.open .float-link:nth-child(3) { transition-delay: .11s; }
  .float-nav.open .float-link:nth-child(2) { transition-delay: .14s; }
  .float-nav.open .float-link:nth-child(1) { transition-delay: .17s; }
  .float-link::before { display: none; }

  .pc-br { display: none; }
  .hero { padding-bottom: 80px; }
  .hero-tags span { font-size: 12px; }

  .about-side { grid-template-columns: 1fr 1fr; }
  .stat-num { font-size: 36px; }

  .sol-body { padding: 28px 22px; }
  .scene-grid { grid-template-columns: 1fr; }
  .contact-info { padding: 32px 26px; }
  .contact-company { font-size: 19px; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { gap: 16px 22px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 6px; }
}

@media (max-width: 420px) {
  .brand-text em { display: none; }
  .hero-cta .btn { width: 100%; text-align: center; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}