/* ==========================================================================
   鸣景行 MJX — 深色科技风设计系统
   消费类电子 MCU / PCBA 方案商营销站
   ========================================================================== */

:root {
  /* 色彩系统 */
  --bg: #0a1220;            /* 页面底色：深蓝黑 */
  --bg-2: #0d1626;          /* 次级底色 */
  --panel: #111d33;         /* 卡片面板 */
  --panel-2: #15233c;       /* 次级面板 */
  --line: rgba(88, 128, 200, .18);   /* 分割线 */
  --line-strong: rgba(96, 165, 250, .35);
  --primary: #2e9bff;       /* 电光蓝 主色 */
  --cyan: #22d3ee;          /* 青 辅助色 */
  --violet: #818cf8;        /* 紫 点缀 */
  --text: #e8eef8;          /* 主文字 */
  --text-2: #9fb0c9;        /* 次级文字 */
  --text-3: #6b7d99;        /* 弱文字 */
  --ok: #34d399;
  --warn: #fbbf24;

  /* 渐变与光效 */
  --grad-main: linear-gradient(135deg, #2e9bff 0%, #22d3ee 100%);
  --grad-text: linear-gradient(92deg, #7cc4ff 0%, #22d3ee 60%, #818cf8 100%);
  --glow: 0 0 24px rgba(46, 155, 255, .35);

  /* 几何 */
  --radius: 14px;
  --radius-s: 8px;
  --maxw: 1200px;

  --font: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}
img, svg { vertical-align: middle; }
a { color: var(--cyan); text-decoration: none; transition: color .2s; }
a:hover { color: #7dd9ef; }

::selection { background: rgba(46, 155, 255, .35); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 页面背景：电路网格氛围 ---------- */
.page-bg {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(1100px 500px at 85% -5%, rgba(46, 155, 255, .12), transparent 60%),
    radial-gradient(900px 480px at -10% 30%, rgba(34, 211, 238, .07), transparent 60%),
    radial-gradient(700px 500px at 60% 110%, rgba(129, 140, 248, .07), transparent 60%),
    var(--bg);
}
.page-bg::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(96, 165, 250, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96, 165, 250, .05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(1200px 700px at 50% 0%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(1200px 700px at 50% 0%, #000 0%, transparent 75%);
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 18, 32, .82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 28px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 17px; letter-spacing: .5px; }
.brand:hover { color: #fff; }
.brand .logo {
  width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--grad-main); color: #04121f;
  box-shadow: var(--glow);
}
.brand small { display: block; font-size: 10.5px; font-weight: 500; color: var(--text-3); letter-spacing: 1.5px; line-height: 1.2; }
.main-nav { display: flex; gap: 4px; margin-left: auto; }
.main-nav a {
  color: var(--text-2); font-size: 14.5px; font-weight: 500;
  padding: 8px 14px; border-radius: 8px; transition: all .2s;
}
.main-nav a:hover, .main-nav a.active { color: #fff; background: rgba(46, 155, 255, .12); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.lang-switch {
  font-size: 13px; color: var(--text-2); border: 1px solid var(--line-strong);
  padding: 5px 12px; border-radius: 999px; font-weight: 600; letter-spacing: .5px;
}
.lang-switch:hover { color: var(--cyan); border-color: var(--cyan); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line-strong); border-radius: 8px; color: var(--text); width: 40px; height: 40px; cursor: pointer; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 10px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: all .25s; line-height: 1.3;
}
.btn-primary { background: var(--grad-main); color: #04121f; box-shadow: var(--glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 34px rgba(46, 155, 255, .5); color: #04121f; }
.btn-ghost { border-color: var(--line-strong); color: var(--text); background: rgba(17, 29, 51, .5); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }
.btn-sm { padding: 8px 18px; font-size: 13.5px; border-radius: 8px; }
.btn-lg { padding: 15px 34px; font-size: 16.5px; }

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section-alt { background: linear-gradient(180deg, transparent 0%, rgba(13, 22, 38, .8) 18%, rgba(13, 22, 38, .8) 82%, transparent 100%); }
.sec-head { max-width: 780px; margin: 0 auto 48px; text-align: center; }
.sec-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 700; letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 14px;
}
.sec-tag::before, .sec-tag::after { content: ""; width: 22px; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan)); }
.sec-tag::after { background: linear-gradient(90deg, var(--cyan), transparent); }
.sec-title { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; line-height: 1.3; letter-spacing: .5px; }
.sec-title .hl { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.sec-desc { color: var(--text-2); margin-top: 14px; font-size: 16px; }

/* ---------- Hero（首页首屏） ---------- */
.hero { position: relative; padding: 92px 0 100px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  border: 1px solid var(--line-strong); background: rgba(17, 29, 51, .6);
  padding: 7px 16px; border-radius: 999px; font-size: 13px; color: var(--text-2); margin-bottom: 26px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 10px var(--ok); }
.hero h1 { font-size: clamp(30px, 4.4vw, 52px); font-weight: 800; line-height: 1.24; letter-spacing: .5px; margin-bottom: 22px; }
.hero h1 .hl { background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { color: var(--text-2); font-size: 17.5px; max-width: 560px; margin-bottom: 34px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 22px; }
.hero-points span { display: inline-flex; align-items: center; gap: 7px; color: var(--text-2); font-size: 13.5px; }
.hero-points .ic { color: var(--cyan); }

/* Hero 芯片插画 */
.chip-visual { position: relative; display: grid; place-items: center; min-height: 380px; }
.chip-core {
  width: 220px; height: 220px; border-radius: 26px;
  background: linear-gradient(160deg, #16263f, #0d1a2f);
  border: 1px solid var(--line-strong);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .5), inset 0 1px 0 rgba(255, 255, 255, .06), var(--glow);
  display: grid; place-items: center; position: relative; z-index: 2;
  animation: float 6s ease-in-out infinite;
}
.chip-core svg { width: 108px; height: 108px; color: var(--primary); filter: drop-shadow(0 0 14px rgba(46, 155, 255, .55)); }
.chip-core .chip-label { position: absolute; bottom: 18px; font-family: var(--mono); font-size: 11px; color: var(--text-3); letter-spacing: 3px; }
.chip-pulse {
  position: absolute; width: 220px; height: 220px; border-radius: 26px;
  border: 1px solid rgba(46, 155, 255, .4);
  animation: pulse 3.4s ease-out infinite;
}
.chip-pulse.d2 { animation-delay: 1.7s; }
.chip-trace { position: absolute; color: var(--primary); opacity: .5; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
@keyframes pulse { 0% { transform: scale(1); opacity: .55; } 100% { transform: scale(1.55); opacity: 0; } }

/* ---------- 信任数字条 ---------- */
.stats-band {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: rgba(13, 22, 38, .6);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat-item { text-align: center; padding: 34px 12px; position: relative; }
.stat-item + .stat-item::before { content: ""; position: absolute; left: 0; top: 22%; height: 56%; width: 1px; background: var(--line); }
.stat-num { font-family: var(--mono); font-size: 40px; font-weight: 700; color: transparent; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; line-height: 1.1; }
.stat-label { color: var(--text-2); font-size: 14px; margin-top: 6px; }

/* ---------- 方案卡片矩阵 ---------- */
.sol-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.sol-card {
  position: relative; border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(170deg, var(--panel), rgba(13, 22, 38, .5));
  padding: 28px 24px 24px; transition: all .3s; overflow: hidden; display: block; color: var(--text);
}
.sol-card::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; opacity: 0; transition: opacity .3s;
  background: radial-gradient(420px 180px at 50% -20%, rgba(46, 155, 255, .16), transparent 70%);
}
.sol-card:hover { transform: translateY(-6px); border-color: var(--line-strong); box-shadow: 0 18px 44px rgba(0, 0, 0, .4); color: var(--text); }
.sol-card:hover::after { opacity: 1; }
.sol-card .sol-icon {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: rgba(46, 155, 255, .1); border: 1px solid var(--line-strong); color: var(--cyan);
  margin-bottom: 18px; transition: all .3s;
}
.sol-card:hover .sol-icon { box-shadow: 0 0 22px rgba(34, 211, 238, .3); color: var(--primary); }
.sol-card h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 8px; }
.sol-card p { color: var(--text-2); font-size: 13.5px; line-height: 1.65; min-height: 66px; }
.sol-card .more { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; font-size: 13px; color: var(--cyan); font-weight: 600; }
.sol-card .cat-chip {
  position: absolute; top: 16px; right: 16px; font-size: 11px; color: var(--text-3);
  border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; letter-spacing: 1px;
}

/* ---------- 三类客户 Tabs ---------- */
.aud-tabs { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }
.aud-tab {
  display: inline-flex; align-items: center; gap: 9px; cursor: pointer;
  border: 1px solid var(--line-strong); background: rgba(17, 29, 51, .5);
  color: var(--text-2); padding: 11px 22px; border-radius: 999px;
  font-size: 15px; font-weight: 600; transition: all .25s;
}
.aud-tab .ic { color: var(--cyan); }
.aud-tab.active, .aud-tab:hover { background: rgba(46, 155, 255, .14); border-color: var(--primary); color: #fff; }
.aud-panel { display: none; animation: fadeUp .4s ease; }
.aud-panel.active { display: block; }
.aud-panel-inner {
  display: grid; grid-template-columns: .9fr 1.1fr; gap: 0;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(170deg, var(--panel), rgba(13, 22, 38, .4));
}
.aud-pain { padding: 44px 40px; background: rgba(10, 18, 32, .55); border-right: 1px solid var(--line); }
.aud-pain .who { font-size: 13px; color: var(--text-3); letter-spacing: 1px; margin-bottom: 10px; }
.aud-pain h3 { font-size: 24px; font-weight: 800; margin-bottom: 6px; }
.aud-pain .sub { color: var(--cyan); font-size: 14px; margin-bottom: 18px; }
.aud-pain .pain { color: var(--text-2); font-size: 15px; border-left: 3px solid var(--warn); padding-left: 16px; }
.aud-value { padding: 40px 40px; }
.aud-value h4 { font-size: 15px; color: var(--ok); letter-spacing: 1px; margin-bottom: 18px; font-weight: 700; }
.aud-value ul { list-style: none; display: grid; gap: 14px; }
.aud-value li { display: flex; gap: 12px; color: var(--text-2); font-size: 15px; line-height: 1.6; }
.aud-value li .ic { flex: none; width: 22px; height: 22px; margin-top: 3px; color: var(--cyan); }
.aud-value .btn { margin-top: 26px; }

/* ---------- 优势卡 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.adv-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; background: rgba(17, 29, 51, .45); transition: all .3s; }
.adv-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.adv-card .num { font-family: var(--mono); font-size: 13px; color: var(--primary); letter-spacing: 2px; margin-bottom: 16px; }
.adv-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.adv-card h3 .ic { color: var(--cyan); }
.adv-card p { color: var(--text-2); font-size: 14px; line-height: 1.7; }

/* ---------- 流程步骤 ---------- */
.flow { display: grid; grid-template-columns: repeat(7, 1fr); gap: 0; position: relative; }
.flow-step { text-align: center; padding: 0 8px; position: relative; }
.flow-step .idx {
  width: 52px; height: 52px; margin: 0 auto 16px; border-radius: 50%;
  display: grid; place-items: center; position: relative; z-index: 2;
  background: var(--panel-2); border: 1px solid var(--line-strong);
  font-family: var(--mono); font-weight: 700; color: var(--cyan); font-size: 16px;
  transition: all .3s;
}
.flow-step:hover .idx { background: var(--grad-main); color: #04121f; box-shadow: var(--glow); border-color: transparent; }
.flow-step::before { content: ""; position: absolute; top: 26px; left: calc(-50% + 26px); right: calc(50% + 26px); height: 1px; background: linear-gradient(90deg, transparent, var(--line-strong), transparent); }
.flow-step:first-child::before { display: none; }
.flow-step h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.flow-step p { font-size: 12.5px; color: var(--text-3); line-height: 1.55; }

/* ---------- 表格（规格参数 / 对比） ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(17, 29, 51, .4); }
table.spec { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 520px; }
table.spec caption { caption-side: top; text-align: left; padding: 16px 20px; font-weight: 700; font-size: 16px; color: var(--text); border-bottom: 1px solid var(--line); background: rgba(46, 155, 255, .06); }
table.spec th, table.spec td { padding: 12px 20px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
table.spec th { color: var(--text-2); font-weight: 600; white-space: nowrap; width: 200px; background: rgba(13, 22, 38, .5); }
table.spec tr:last-child td { border-bottom: none; }
table.spec td { color: var(--text); }
table.spec td .mono { font-family: var(--mono); color: var(--cyan); font-size: 13.5px; }

/* ---------- FAQ 手风琴 ---------- */
.faq-list { max-width: 860px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius-s); background: rgba(17, 29, 51, .45); overflow: hidden; transition: border-color .25s; }
.faq-item[open] { border-color: var(--line-strong); }
.faq-item summary {
  cursor: pointer; list-style: none; padding: 17px 22px;
  font-weight: 600; font-size: 15.5px; display: flex; align-items: center; gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before {
  content: "+"; flex: none; width: 24px; height: 24px; border-radius: 6px; display: grid; place-items: center;
  background: rgba(46, 155, 255, .12); color: var(--cyan); font-weight: 700; transition: all .25s;
}
.faq-item[open] summary::before { content: "−"; background: var(--grad-main); color: #04121f; }
.faq-item summary:hover { color: var(--cyan); }
.faq-item .faq-a { padding: 0 22px 18px 58px; color: var(--text-2); font-size: 14.5px; line-height: 1.75; }

/* ---------- 询盘表单 ---------- */
.inquiry-band {
  border: 1px solid var(--line-strong); border-radius: 20px; position: relative; overflow: hidden;
  background:
    radial-gradient(600px 300px at 90% 0%, rgba(46, 155, 255, .16), transparent 65%),
    radial-gradient(500px 260px at 5% 100%, rgba(129, 140, 248, .12), transparent 65%),
    linear-gradient(170deg, var(--panel), rgba(13, 22, 38, .7));
  padding: 56px;
}
.inquiry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.inquiry-band h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; margin-bottom: 14px; }
.inquiry-band .lead { color: var(--text-2); margin-bottom: 26px; }
.contact-channels { display: grid; gap: 16px; }
.channel { display: flex; gap: 14px; align-items: center; }
.channel .ch-ic { flex: none; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(46, 155, 255, .1); border: 1px solid var(--line-strong); color: var(--cyan); }
.channel .k { font-size: 12px; color: var(--text-3); letter-spacing: 1px; }
.channel .v { font-size: 15px; font-weight: 600; color: var(--text); }
.form { display: grid; gap: 14px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form label { font-size: 13px; color: var(--text-2); display: block; margin-bottom: 6px; }
.form input, .form select, .form textarea {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-s);
  background: rgba(10, 18, 32, .7); border: 1px solid var(--line);
  color: var(--text); font-size: 14.5px; font-family: inherit; transition: border-color .2s, box-shadow .2s;
}
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(46, 155, 255, .15); }
.form select { appearance: none; -webkit-appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-3) 50%), linear-gradient(135deg, var(--text-3) 50%, transparent 50%); background-position: calc(100% - 20px) 55%, calc(100% - 14px) 55%; background-size: 6px 6px; background-repeat: no-repeat; }
.form select option { background: var(--panel); }
.form .note { font-size: 12px; color: var(--text-3); }
.form-success { display: none; text-align: center; padding: 40px 20px; color: var(--ok); }

/* ---------- 面包屑 ---------- */
.breadcrumb { padding: 22px 0 0; font-size: 13px; color: var(--text-3); }
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb .sep { margin: 0 8px; opacity: .5; }

/* ---------- 页面主标题区（内页） ---------- */
.page-hero { padding: 44px 0 26px; }
.page-hero h1 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; line-height: 1.3; margin-bottom: 14px; }
.page-hero .lead { color: var(--text-2); font-size: 16.5px; max-width: 820px; }

/* ---------- 方案详情页 ---------- */
.prod-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
.prod-main { display: grid; gap: 44px; }
.prod-block h2 { font-size: 24px; font-weight: 800; margin-bottom: 20px; display: flex; align-items: center; gap: 12px; }
.prod-block h2::before { content: ""; width: 5px; height: 22px; border-radius: 3px; background: var(--grad-main); box-shadow: var(--glow); }
.prod-block p { color: var(--text-2); margin-bottom: 12px; }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.feature-item { display: flex; gap: 12px; padding: 16px 18px; border: 1px solid var(--line); border-radius: var(--radius-s); background: rgba(17, 29, 51, .4); }
.feature-item .ic { flex: none; width: 22px; height: 22px; color: var(--cyan); margin-top: 2px; }
.feature-item b { display: block; font-size: 14.5px; margin-bottom: 3px; }
.feature-item span { font-size: 13px; color: var(--text-2); line-height: 1.6; }

/* 方案侧栏 */
.prod-aside { position: sticky; top: 92px; display: grid; gap: 18px; }
.aside-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; background: linear-gradient(170deg, var(--panel), rgba(13, 22, 38, .5)); }
.aside-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.aside-card h3 .ic { color: var(--cyan); }
.aside-kv { display: grid; gap: 12px; }
.aside-kv .kv { display: flex; justify-content: space-between; gap: 12px; font-size: 13.5px; }
.aside-kv .kv .k { color: var(--text-3); }
.aside-kv .kv .v { color: var(--text); font-weight: 600; text-align: right; }
.aside-card .btn { width: 100%; margin-top: 16px; }
.aside-nav a { display: block; padding: 9px 12px; border-radius: 8px; color: var(--text-2); font-size: 13.5px; border-left: 2px solid transparent; }
.aside-nav a:hover { color: var(--cyan); background: rgba(46, 155, 255, .07); border-left-color: var(--cyan); }

/* 引用定义块（GEO 可摘录句） */
.def-quote {
  border-left: 3px solid var(--cyan); border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: linear-gradient(90deg, rgba(34, 211, 238, .08), transparent 80%);
  padding: 20px 24px; margin: 18px 0; color: var(--text); font-size: 16px; line-height: 1.8;
}
.def-quote .q-tag { display: block; font-size: 12px; color: var(--cyan); letter-spacing: 2px; margin-bottom: 8px; font-weight: 700; }

/* ---------- 案例卡 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; background: rgba(17, 29, 51, .45); transition: all .3s; }
.case-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.case-card .case-tag { display: inline-block; font-size: 12px; padding: 4px 12px; border-radius: 999px; background: rgba(46, 155, 255, .12); color: var(--cyan); border: 1px solid rgba(46, 155, 255, .25); margin-bottom: 16px; font-weight: 600; }
.case-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.case-card .prob { color: var(--text-2); font-size: 14px; margin-bottom: 14px; }
.case-card .r { display: flex; align-items: baseline; gap: 14px; margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--line); }
.case-card .r .rn { font-family: var(--mono); font-size: 26px; font-weight: 700; color: transparent; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; }
.case-card .r .rl { font-size: 12.5px; color: var(--text-3); }

/* ---------- 认证墙 ---------- */
.cert-band { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.cert-item {
  display: inline-flex; align-items: center; gap: 10px; padding: 12px 26px;
  border: 1px solid var(--line); border-radius: 999px; background: rgba(17, 29, 51, .5);
  font-family: var(--mono); font-weight: 700; font-size: 15px; color: var(--text-2); letter-spacing: 1px;
  transition: all .3s;
}
.cert-item:hover { border-color: var(--cyan); color: var(--cyan); box-shadow: 0 0 18px rgba(34, 211, 238, .18); }
.cert-item .ic { color: var(--cyan); }

/* ---------- 博客 ---------- */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.blog-card { display: block; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: rgba(17, 29, 51, .45); transition: all .3s; color: var(--text); }
.blog-card:hover { transform: translateY(-5px); border-color: var(--line-strong); color: var(--text); box-shadow: 0 16px 40px rgba(0, 0, 0, .38); }
.blog-card .bc-cover { height: 150px; display: grid; place-items: center; position: relative; background: linear-gradient(140deg, rgba(46, 155, 255, .16), rgba(13, 22, 38, .2) 60%, rgba(129, 140, 248, .12)); border-bottom: 1px solid var(--line); }
.blog-card .bc-cover .ic { width: 44px; height: 44px; color: var(--cyan); opacity: .9; }
.blog-card .bc-cover::after { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(96, 165, 250, .06) 1px, transparent 1px), linear-gradient(90deg, rgba(96, 165, 250, .06) 1px, transparent 1px); background-size: 22px 22px; }
.blog-card .bc-body { padding: 22px 22px 24px; }
.blog-card .bc-meta { display: flex; gap: 12px; font-size: 12px; color: var(--text-3); margin-bottom: 10px; }
.blog-card .bc-meta .cat { color: var(--cyan); font-weight: 600; }
.blog-card h3 { font-size: 16.5px; font-weight: 700; line-height: 1.5; margin-bottom: 8px; }
.blog-card p { font-size: 13.5px; color: var(--text-2); line-height: 1.65; }

/* 文章页 */
.article { max-width: 840px; margin: 0 auto; }
.article-meta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; font-size: 13px; color: var(--text-3); margin: 14px 0 34px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.article-meta .cat { color: var(--cyan); font-weight: 700; }
.article-body { display: grid; gap: 26px; }
.article-body h2 { font-size: 22px; font-weight: 800; margin-top: 10px; padding-left: 14px; border-left: 4px solid var(--primary); line-height: 1.4; }
.article-body h3 { font-size: 17.5px; font-weight: 700; color: var(--text); }
.article-body p { color: var(--text-2); font-size: 15.5px; line-height: 1.9; }
.article-body p b, .article-body li b { color: var(--text); }
.article-body ul, .article-body ol { padding-left: 22px; display: grid; gap: 8px; color: var(--text-2); font-size: 15px; line-height: 1.8; }
.article-body a { text-decoration: underline; text-underline-offset: 3px; }
.article-toc { border: 1px solid var(--line); border-radius: var(--radius-s); padding: 18px 22px; background: rgba(17, 29, 51, .4); margin-bottom: 30px; }
.article-toc .toc-t { font-size: 13px; font-weight: 700; color: var(--cyan); letter-spacing: 2px; margin-bottom: 10px; }
.article-toc a { display: block; color: var(--text-2); font-size: 13.5px; padding: 3.5px 0; }
.article-toc a:hover { color: var(--cyan); }
.article-related { margin-top: 54px; padding-top: 34px; border-top: 1px solid var(--line); }
.article-related h3 { font-size: 18px; font-weight: 700; margin-bottom: 18px; }

/* CTA 横幅 */
.cta-banner {
  margin-top: 54px; border-radius: var(--radius); padding: 38px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  background: radial-gradient(500px 200px at 100% 0%, rgba(46, 155, 255, .18), transparent 60%), linear-gradient(140deg, var(--panel-2), rgba(13, 22, 38, .8));
  border: 1px solid var(--line-strong);
}
.cta-banner h3 { font-size: 20px; font-weight: 800; margin-bottom: 6px; }
.cta-banner p { color: var(--text-2); font-size: 14px; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--line); background: rgba(10, 18, 32, .92); margin-top: 90px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 44px; padding: 60px 0 44px; }
.footer-brand p { color: var(--text-2); font-size: 13.5px; margin-top: 16px; line-height: 1.75; }
.footer-col h4 { font-size: 14.5px; font-weight: 700; margin-bottom: 18px; color: var(--text); letter-spacing: .5px; }
.footer-col ul { list-style: none; display: grid; gap: 10px; }
.footer-col a { color: var(--text-2); font-size: 13.5px; transition: all .2s; }
.footer-col a:hover { color: var(--cyan); padding-left: 4px; }
.footer-contact li { display: flex; gap: 10px; color: var(--text-2); font-size: 13.5px; line-height: 1.7; }
.footer-contact .ic { flex: none; width: 18px; height: 18px; color: var(--cyan); margin-top: 4px; }
.footer-bottom { border-top: 1px solid var(--line); padding: 20px 0; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--text-3); }
.footer-bottom a { color: var(--text-3); }

/* ---------- 浮动询盘 ---------- */
.float-cta { position: fixed; right: 22px; bottom: 26px; z-index: 90; display: flex; flex-direction: column; gap: 12px; }
.float-btn {
  width: 54px; height: 54px; border-radius: 50%; display: grid; place-items: center;
  border: 1px solid var(--line-strong); background: rgba(17, 29, 51, .92); color: var(--cyan);
  transition: all .25s; box-shadow: 0 8px 24px rgba(0, 0, 0, .45); backdrop-filter: blur(6px);
}
.float-btn:hover { transform: translateY(-3px); color: #fff; background: var(--grad-main); border-color: transparent; box-shadow: var(--glow); }
.float-btn.wa { color: #25d366; }
.float-btn.wa:hover { background: #25d366; color: #fff; }
.float-btn svg { width: 24px; height: 24px; }

/* ---------- 动效 ---------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } .chip-core, .chip-pulse { animation: none; } }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .sol-grid { grid-template-columns: repeat(3, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(4, 1fr); row-gap: 34px; }
  .prod-layout { grid-template-columns: 1fr; }
  .prod-aside { position: static; }
  .blog-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .chip-visual { min-height: 300px; }
  .aud-panel-inner { grid-template-columns: 1fr; }
  .aud-pain { border-right: none; border-bottom: 1px solid var(--line); }
  .inquiry-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  .nav-toggle { display: grid; place-items: center; margin-left: auto; }
  .main-nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; background: rgba(10, 18, 32, .98); border-bottom: 1px solid var(--line);
    padding: 14px 20px 20px; gap: 2px;
  }
  .main-nav.open { display: flex; }
  .header-actions .btn { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(3)::before { display: none; }
}
@media (max-width: 640px) {
  .section { padding: 56px 0; }
  .sol-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: 1fr; }
  .blog-grid, .case-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .inquiry-band { padding: 32px 22px; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero { padding: 56px 0 66px; }
}