/* ============================================================
   长沙兵推科技有限公司 - 增强主题层 theme.css
   在第一版 style.css 之上：丰富配色 + 工业字体 + 多页面组件 + 科技母题
   ============================================================ */

/* ---------- 本地自托管字体（SIL OFL 开源许可，可商用，无版权纠纷） ----------
   · Oswald（标题/英文标签）与 JetBrains Mono（数据/等宽标签）均为可变字体，
     仅含拉丁子集，本地加载，零外网请求，避免 Google Fonts 在国内访问慢/阻塞渲染。
   · 中文正文使用系统字体栈（PingFang SC / Microsoft YaHei），即时显示无需下载。
   · unicode-range 与 Google Fonts 的 latin 子集一致；中文字符自动回退到系统字体。
   --------------------------------------------------------------------------- */
@font-face{
  font-family:'Oswald';font-style:normal;font-weight:400;
  font-display:swap;src:url(../assets/fonts/Oswald-Var.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'Oswald';font-style:normal;font-weight:500;
  font-display:swap;src:url(../assets/fonts/Oswald-Var.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'Oswald';font-style:normal;font-weight:600;
  font-display:swap;src:url(../assets/fonts/Oswald-Var.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'Oswald';font-style:normal;font-weight:700;
  font-display:swap;src:url(../assets/fonts/Oswald-Var.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'JetBrains Mono';font-style:normal;font-weight:500;
  font-display:swap;src:url(../assets/fonts/JetBrainsMono-Var.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'JetBrains Mono';font-style:normal;font-weight:700;
  font-display:swap;src:url(../assets/fonts/JetBrainsMono-Var.woff2) format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

/* ---------- 配色覆盖（更丰富） ---------- */
:root{
  --navy:#0E2A47;
  --navy-2:#14365E;
  --navy-900:#0A1626;
  --steel:#1B2A3A;
  --blue:#1E6FD9;
  --blue-light:#3B8BFF;
  --cyan:#38BDF8;
  --amber:#F5A524;
  --red:#D64545;
  --red-2:#B5302F;
  --ink:#0F1B2D;
  --ink-soft:#475569;
  --muted:#8A9BB0;
  --line:#E2E8F0;
  --bg:#FFFFFF;
  --bg-alt:#F4F7FB;
  --bg-soft:#EAF1FA;
  --radius:14px;
  --shadow:0 12px 34px rgba(10,22,38,.09);
  --shadow-lg:0 22px 56px rgba(10,22,38,.16);
  --header-h:76px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:'Oswald','Noto Sans SC',sans-serif;
  --font-body:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
}

body{font-family:var(--font-body);color:var(--ink)}
html.site-grayscale{filter:grayscale(1)}
.container{max-width:1240px}

/* 等宽/工业字体工具类 */
.mono{font-family:var(--font-mono);letter-spacing:.5px}
.display{font-family:var(--font-display);letter-spacing:1px}

/* ---------- 按钮增强 ---------- */
.btn{font-family:var(--font-body);border-radius:4px;letter-spacing:1px}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-light));box-shadow:0 8px 22px rgba(30,111,217,.32)}
.btn-ghost{border-radius:4px}

/* 角标箭头按钮 */
.btn-arrow::after{content:"›";margin-left:8px;font-family:var(--font-display);font-weight:700}

/* ============================================================
   顶部导航：Mega-menu
   ============================================================ */
.site-header{height:var(--header-h)}
.brand-logo{height:46px;filter:brightness(0) invert(1)}
.site-header.scrolled .brand-logo{height:42px;filter:none}
.site-header.scrolled{background:rgba(255,255,255,.97);box-shadow:0 2px 18px rgba(10,22,38,.08)}

.nav-menu{gap:2px}
.nav-link{
  font-family:var(--font-body);font-weight:600;font-size:15px;
  padding:10px 16px;text-transform:none;letter-spacing:.5px;
}
.nav-link .nav-en{display:block;font-family:var(--font-display);font-size:10px;font-weight:500;letter-spacing:1.5px;opacity:.6;margin-top:-2px}

/* 下拉分组 */
.nav-group{position:relative}
.nav-trigger{
  display:inline-flex;align-items:center;gap:5px;padding:10px 16px;font-size:15px;font-weight:600;
  color:#fff;background:none;border:none;cursor:pointer;font-family:var(--font-body);
  border-radius:8px;transition:color .25s var(--ease);
}
.site-header.scrolled .nav-trigger{color:var(--ink)}
.nav-trigger:hover{color:var(--blue-light)}
.nav-trigger svg{transition:transform .25s var(--ease)}
.nav-group:hover .nav-trigger svg{transform:rotate(180deg)}

.dropdown{
  position:absolute;top:calc(100% + 8px);left:0;min-width:260px;
  background:#fff;border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--shadow-lg);padding:10px;display:flex;flex-direction:column;gap:2px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s;
  z-index:1001;
}
.nav-group:hover .dropdown,.nav-group:focus-within .dropdown{opacity:1;visibility:visible;transform:none}
.dropdown-item{
  display:flex;align-items:center;gap:14px;padding:12px 14px;border-radius:6px;
  color:var(--ink);font-weight:600;font-size:14px;transition:background .2s,color .2s;
}
.dropdown-item:hover{background:var(--bg-soft);color:var(--blue)}
.di-num{font-family:var(--font-mono);font-size:11px;font-weight:700;color:var(--blue);min-width:34px}
.di-body{display:flex;flex-direction:column}
.di-body strong{font-size:14px}
.di-body span{font-size:12px;color:var(--muted);font-weight:400}

.nav-toggle span{background:#fff}
.site-header.scrolled .nav-toggle span{background:var(--ink)}

/* ============================================================
   首页 Hero 增强
   ============================================================ */
.hero{
  background:
    radial-gradient(1100px 560px at 78% -8%,rgba(56,189,248,.20) 0%,transparent 58%),
    radial-gradient(900px 520px at 2% 108%,rgba(20,54,94,.7) 0%,transparent 55%),
    linear-gradient(155deg,#0A1626 0%,#0E2A47 55%,#07111F 100%);
}
.hero-overlay{
  opacity:.5;
  background-image:linear-gradient(rgba(120,170,255,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,170,255,.07) 1px,transparent 1px);
  background-size:46px 46px;
}
/* 雷达扫描装饰 */
.hero-radar{position:absolute;right:-120px;top:50%;transform:translateY(-50%);width:620px;height:620px;z-index:1;pointer-events:none;opacity:.5}
.hero-radar .ring{fill:none;stroke:rgba(56,189,248,.25);stroke-width:1}
.hero-radar .ring.b{stroke:rgba(56,189,248,.14)}
.hero-radar .sweep{fill:url(#sweepGrad);transform-origin:50% 50%;animation:radarSweep 7s linear infinite}
@keyframes radarSweep{to{transform:rotate(360deg)}}
.hero-radar .cross{stroke:rgba(56,189,248,.18);stroke-width:1}
@media (prefers-reduced-motion:reduce){.hero-radar .sweep{animation:none}}

.hero-eyebrow{
  font-family:var(--font-display);font-size:13px;letter-spacing:4px;font-weight:600;
  color:var(--cyan);border-color:rgba(56,189,248,.4);background:rgba(56,189,248,.08);
}
.hero-eyebrow::before{content:"";display:inline-block;width:24px;height:1px;background:var(--cyan);vertical-align:middle;margin-right:10px}
.hero-title{font-family:var(--font-display);font-weight:700;letter-spacing:1px}
.hero-desc{max-width:680px}

/* Hero 数据条增强 */
.hero-stats{border-top:1px solid rgba(255,255,255,.12)}
.stat-num{font-family:var(--font-display);font-weight:700}
.stat-num .u{color:var(--cyan);font-size:.6em;vertical-align:super}

/* ============================================================
   编号板块标题（母题）
   ============================================================ */
.section{padding:96px 0}
.section-head{margin-bottom:56px;position:relative}
.section-tag{
  font-family:var(--font-display);font-size:12px;letter-spacing:3px;font-weight:600;
  color:var(--blue);background:var(--bg-soft);
}
.section-tag .num{color:var(--red);font-family:var(--font-mono);margin-right:6px}
.section-title{font-family:var(--font-display);font-weight:700;letter-spacing:1px}
/* 标题左侧装饰条 */
.section-head.center .section-title::after{
  content:"";display:block;width:54px;height:3px;margin:18px auto 0;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
}
.section-head.left{text-align:left}
.section-head.left .section-title::after{
  content:"";display:block;width:54px;height:3px;margin:16px 0 0;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
}

/* ============================================================
   科技母题：角标括号 / 等宽标签 / 网格块
   ============================================================ */
/* 卡片角标 */
.bracket{position:relative}
.bracket::before,.bracket::after{
  content:"";position:absolute;width:14px;height:14px;border:2px solid var(--cyan);pointer-events:none;
  opacity:0;transition:opacity .3s var(--ease);
}
.bracket::before{top:10px;left:10px;border-right:none;border-bottom:none}
.bracket::after{bottom:10px;right:10px;border-left:none;border-top:none}
.bracket:hover::before,.bracket:hover::after{opacity:1}

/* 等宽状态标签 */
.tag-mono{
  display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:1px;color:var(--blue);background:var(--bg-soft);padding:4px 10px;border-radius:4px;
  text-transform:uppercase;
}
.tag-mono.amber{color:#B07300;background:rgba(245,165,36,.14)}
.tag-mono.red{color:var(--red);background:rgba(214,69,69,.12)}
.tag-mono.cyan{color:#0E7490;background:rgba(56,189,248,.14)}
.tag-mono .blip{width:6px;height:6px;border-radius:50%;background:currentColor;box-shadow:0 0 0 3px currentColor;opacity:.25}

/* 深色网格块（背景装饰） */
.grid-block{
  background:linear-gradient(160deg,var(--navy-900),var(--navy));border-radius:var(--radius);
  position:relative;overflow:hidden;color:#fff;
}
.grid-block::before{
  content:"";position:absolute;inset:0;opacity:.4;pointer-events:none;
  background-image:linear-gradient(rgba(120,170,255,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,170,255,.07) 1px,transparent 1px);
  background-size:28px 28px;
}
.grid-block>*{position:relative;z-index:1}

/* ============================================================
   内页：页面 Hero + 面包屑
   ============================================================ */
.page-hero{
  position:relative;padding:calc(var(--header-h) + 64px) 0 84px;color:#fff;overflow:hidden;
  background:
    radial-gradient(1000px 520px at 82% -10%,rgba(56,189,248,.18) 0%,transparent 58%),
    radial-gradient(800px 460px at 0% 110%,rgba(20,54,94,.65) 0%,transparent 55%),
    linear-gradient(160deg,#0A1626 0%,#0E2A47 60%,#07111F 100%);
}
.page-hero::before{
  content:"";position:absolute;inset:0;opacity:.42;pointer-events:none;
  background-image:linear-gradient(rgba(120,170,255,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,170,255,.07) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 80%);
}
.page-hero-inner{position:relative;z-index:2;max-width:880px}
.breadcrumb{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.5px;color:rgba(255,255,255,.5);margin-bottom:20px}
.breadcrumb a{color:rgba(255,255,255,.85)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb span{opacity:.5}
.page-hero-tag{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-display);font-size:12px;letter-spacing:3px;font-weight:600;
  color:var(--cyan);border:1px solid rgba(56,189,248,.4);border-radius:3px;padding:5px 14px;margin-bottom:20px;background:rgba(56,189,248,.08);
}
.page-hero-tag .n{color:var(--red);font-family:var(--font-mono)}
.page-hero h1{font-family:var(--font-display);font-size:clamp(30px,4.6vw,50px);font-weight:700;line-height:1.18;letter-spacing:1px;margin-bottom:18px}
.page-hero p{font-size:clamp(15px,1.6vw,18px);color:rgba(255,255,255,.78);max-width:720px;line-height:1.85}

/* ============================================================
   业务页组件
   ============================================================ */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cap-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;
  box-shadow:var(--shadow);transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.cap-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.cap-card .cc-ico{width:52px;height:52px;border-radius:10px;display:grid;place-items:center;margin-bottom:16px;color:var(--blue);background:var(--bg-soft)}
.cap-card:hover .cc-ico{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff}
.cap-card h4{font-size:17px;color:var(--navy-900);margin-bottom:8px}
.cap-card p{font-size:14px;color:var(--ink-soft);line-height:1.7}
.cap-card .cc-tag{margin-top:14px}

/* 双栏：文 + 深色可视化块 — 使用 flex 布局以支持 rev 交换 */
.split-row{display:flex;gap:52px;align-items:center}
.split-row.rev{flex-direction:row-reverse}
.split-row .split-text{flex:1.05}
.split-row .split-vis{flex:0.95}
.split-text h2{font-family:var(--font-display);font-size:clamp(24px,3vw,34px);font-weight:700;color:var(--navy-900);line-height:1.25;margin-bottom:16px}
.split-text p{color:var(--ink-soft);line-height:1.85;margin-bottom:16px}
.split-vis{min-height:340px;padding:34px;display:flex;flex-direction:column;justify-content:center}

/* 特性列表 */
.feat-list{display:flex;flex-direction:column;gap:14px}
.feat-item{display:flex;align-items:flex-start;gap:16px;padding:16px 20px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);transition:transform .25s var(--ease)}
.feat-item:hover{transform:translateX(4px)}
.feat-no{width:30px;height:30px;border-radius:6px;flex:none;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-family:var(--font-mono);font-weight:700;font-size:13px;display:grid;place-items:center}
.feat-item h4{font-size:16px;color:var(--navy-900);margin-bottom:3px}
.feat-item p{font-size:13.5px;color:var(--ink-soft);line-height:1.65;margin:0}

/* 架构流程图 */
.arch-flow{display:flex;align-items:stretch;justify-content:center;gap:10px;flex-wrap:wrap;padding:34px 26px}
.arch-node{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:10px;padding:18px 18px;text-align:center;color:#fff;min-width:118px;flex:1 1 118px}
.arch-node .an-ico{color:var(--cyan);margin-bottom:8px;display:grid;place-items:center}
.arch-node h4{font-size:14px;font-weight:700}
.arch-node p{font-size:11.5px;color:rgba(255,255,255,.55);margin-top:3px}
.arch-arrow{color:var(--cyan);font-family:var(--font-display);font-size:22px;align-self:center}

/* 步骤条 */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 18px;text-align:center;position:relative;box-shadow:var(--shadow);transition:transform .25s var(--ease)}
.step:hover{transform:translateY(-4px)}
.step::after{content:"›";position:absolute;right:-12px;top:50%;transform:translateY(-50%);font-family:var(--font-display);font-size:22px;color:var(--blue)}
.step:last-child::after{display:none}
.step-no{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;font-family:var(--font-mono);font-weight:700;font-size:14px;margin-bottom:12px}
.step h4{font-size:15px;color:var(--navy-900);margin-bottom:5px}
.step p{font-size:12.5px;color:var(--ink-soft);line-height:1.6}

/* 数据块（深色） */
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.kpi{background:var(--navy-900);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:26px 22px;text-align:center}
.kpi-n{font-family:var(--font-display);font-size:clamp(30px,3.6vw,46px);font-weight:700;line-height:1;background:linear-gradient(135deg,#fff,var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.kpi-n .u{font-size:.5em;vertical-align:super;color:var(--cyan);-webkit-text-fill-color:var(--cyan)}
.kpi-l{font-size:14px;color:rgba(255,255,255,.6);margin-top:10px}

/* 用例卡 */
.uc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.uc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.uc-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.uc-head{height:128px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--navy),var(--blue));position:relative;overflow:hidden}
.uc-head::after{content:"";position:absolute;inset:0;opacity:.16;background-image:linear-gradient(rgba(255,255,255,.4) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.4) 1px,transparent 1px);background-size:22px 22px}
.uc-body{padding:22px 24px 26px}
.uc-body h3{font-size:18px;color:var(--navy-900);margin-bottom:8px}
.uc-body p{font-size:14px;color:var(--ink-soft);line-height:1.75}

/* 全幅 CTA */
.cta-band{position:relative;background:linear-gradient(135deg,var(--navy-900),var(--navy));color:#fff;padding:84px 0;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;opacity:.4;background-image:linear-gradient(rgba(120,170,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.07) 1px,transparent 1px);background-size:48px 48px}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.cta-text h2{font-family:var(--font-display);font-size:clamp(24px,3vw,34px);font-weight:700;margin-bottom:10px}
.cta-text p{color:rgba(255,255,255,.7);max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 引用块 */
.quote{background:var(--bg-alt);border-left:3px solid var(--cyan);border-radius:0 10px 10px 0;padding:20px 26px;color:var(--ink-soft);line-height:1.8}

.quote strong{color:var(--navy-900)}

/* 列表 */
.check-list{display:flex;flex-direction:column;gap:11px}
.check-list li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:var(--ink-soft);line-height:1.7}
.check-list li::before{content:"";flex:none;width:18px;height:18px;margin-top:4px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231E6FD9' stroke-width='3'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/contain no-repeat}

/* ---------- 第一版组件增强 ---------- */
.biz-card,.product-card,.news-card{position:relative}
.biz-card::before,.product-card::before{background:linear-gradient(90deg,var(--blue),var(--cyan))}

/* 产品封面增强（等高线感） */
.product-cover{background:linear-gradient(135deg,var(--navy-900),var(--blue));position:relative}
.product-cover::after{opacity:.2}
.product-cover .pc-label{position:absolute;left:16px;top:14px;font-family:var(--font-mono);font-size:11px;color:var(--cyan);letter-spacing:1px;z-index:2}

/* ============================================================
   新闻页 / 联系页
   ============================================================ */
.news-page-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

.contact-form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
.form-group{display:flex;flex-direction:column;gap:7px;margin-bottom:18px}
.form-group label{font-size:13px;font-weight:700;color:var(--navy-900);font-family:var(--font-display);letter-spacing:.5px}
.form-group input,.form-group textarea,.form-group select{padding:12px 14px;border:1px solid var(--line);border-radius:6px;font-size:15px;font-family:var(--font-body);color:var(--ink);background:#fff;transition:border-color .2s,box-shadow .2s}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(30,111,217,.12)}
.form-group textarea{min-height:120px;resize:vertical}
.form-row .form-group{margin-bottom:0}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:992px){
  :root{--header-h:66px}
  .section{padding:72px 0}
  .split-row{flex-direction:column;gap:34px}
  .split-row.rev{flex-direction:column}
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .uc-grid{grid-template-columns:repeat(2,1fr)}
  .kpi-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(3,1fr)}
  .step:nth-child(3)::after{display:none}
  .news-page-grid{grid-template-columns:repeat(2,1fr)}
  .hero-radar{display:none}
}

@media (max-width:768px){
  :root{--header-h:62px}
  body{font-size:15px}
  /* 移动端导航：抽屉 + 折叠分组 */
  .nav-toggle{display:flex}
  .nav-menu{
    position:fixed;top:var(--header-h);left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(255,255,255,.98);backdrop-filter:blur(12px);padding:8px 16px 24px;
    box-shadow:0 16px 30px rgba(10,22,38,.12);transform:translateY(-130%);opacity:0;visibility:hidden;
    transition:transform .35s var(--ease),opacity .35s,visibility .35s;max-height:calc(100vh - var(--header-h));overflow-y:auto;
  }
  .nav-menu.open{transform:none;opacity:1;visibility:visible}
  .nav-link,.nav-trigger{color:var(--ink);padding:14px 16px;font-size:16px;border-radius:0;border-bottom:1px solid var(--line);width:100%;justify-content:space-between}
  .nav-link:hover,.nav-link.active{background:var(--bg-soft);color:var(--blue)}
  .nav-group{position:static}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;background:var(--bg-soft);min-width:auto;padding:4px 8px;margin:0 8px 8px;display:none}
  .nav-group.open .dropdown{display:flex}
  .nav-trigger svg{transition:transform .25s}
  .nav-group.open .nav-trigger svg{transform:rotate(180deg)}
  .brand-logo{height:34px;filter:brightness(0) invert(1)}

  .cap-grid{grid-template-columns:1fr;gap:16px}
  .uc-grid{grid-template-columns:1fr;gap:18px}
  .kpi-grid{grid-template-columns:1fr;gap:12px}
  .steps{grid-template-columns:1fr;gap:12px}
  .step::after{display:none}
  .arch-flow{flex-direction:column;gap:8px}
  .arch-arrow{transform:rotate(90deg);align-self:center}
  .news-page-grid{grid-template-columns:1fr;gap:18px}
  .form-row{grid-template-columns:1fr}
  .contact-form-card{padding:24px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .page-hero{padding:calc(var(--header-h) + 40px) 0 60px}
  .section{padding:56px 0}
}

@media (max-width:380px){
  .uc-grid,.kpi-grid,.news-page-grid{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ============================================================
   技术文章 / 资源下载 / 详情页（数据驱动）
   ============================================================ */

/* 分类筛选标签条 */
.filter-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:40px}
.filter-tab{
  font-family:var(--font-body);font-size:14px;font-weight:600;color:var(--ink-soft);
  background:#fff;border:1px solid var(--line);padding:8px 18px;border-radius:30px;cursor:pointer;
  transition:color .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease);
}
.filter-tab:hover{border-color:var(--blue);color:var(--blue)}
.filter-tab.active{background:linear-gradient(135deg,var(--blue),var(--blue-light));color:#fff;border-color:transparent;box-shadow:0 6px 16px rgba(30,111,217,.3)}

/* 技术文章列表卡 */
.tech-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tech-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.tech-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.tech-card-link{display:flex;flex-direction:column;height:100%;color:inherit}
.tech-cover{height:150px;position:relative;display:grid;place-items:center;color:#fff;overflow:hidden}
.tech-cover::after{content:"";position:absolute;inset:0;opacity:.16;background-image:linear-gradient(rgba(255,255,255,.4) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.4) 1px,transparent 1px);background-size:22px 22px}
.tech-cover .tc-date{position:relative;z-index:2;text-align:center}
.tech-cover .tc-date .d{font-family:var(--font-display);font-size:30px;font-weight:700;line-height:1}
.tech-cover .tc-date .m{font-size:12px;opacity:.85;margin-top:4px}
.tech-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.tech-meta{margin-bottom:10px}
.tech-card h3{font-size:17px;color:var(--navy-900);font-weight:700;line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tc-desc{font-size:14px;color:var(--ink-soft);line-height:1.7;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tech-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:14px;flex-wrap:wrap}
.tech-author{font-size:12.5px;color:var(--muted)}
.tech-tags{display:flex;gap:6px;flex-wrap:wrap}
.tech-tag{font-size:11px;font-weight:600;color:var(--blue);background:var(--bg-soft);padding:2px 8px;border-radius:4px}

/* 资源下载卡 */
.resource-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.resource-card{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow);transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.resource-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.rc-ico{flex:none;width:52px;height:52px;border-radius:10px;display:grid;place-items:center;color:var(--blue);background:var(--bg-soft);transition:all .3s var(--ease)}
.resource-card:hover .rc-ico{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff}
.rc-ico svg{width:26px;height:26px}
.rc-body{display:flex;flex-direction:column;flex:1;min-width:0}
.rc-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:6px}
.rc-top h3{font-size:16px;color:var(--navy-900);font-weight:700;line-height:1.4}
.rc-type{flex:none;font-family:var(--font-mono);font-size:11px;font-weight:700;color:var(--cyan);background:rgba(56,189,248,.14);padding:3px 8px;border-radius:4px;letter-spacing:.5px}
.rc-desc{font-size:13.5px;color:var(--ink-soft);line-height:1.65;flex:1}
.rc-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;flex-wrap:wrap}
.rc-meta{font-size:12.5px;color:var(--muted)}
.btn-download{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:30px;font-size:13px;font-weight:600;transition:all .25s var(--ease)}
.btn-download.available{background:linear-gradient(135deg,var(--blue),var(--blue-light));color:#fff;box-shadow:0 6px 16px rgba(30,111,217,.3)}
.btn-download.available:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(30,111,217,.4)}
.btn-download.disabled{background:var(--bg-soft);color:var(--ink-soft);cursor:not-allowed}

/* 内容发现：新闻 / 技术文章 / 资源下载 */
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.content-explorer{--explorer-border:#dbe4f0;background:linear-gradient(180deg,#fff 0,#fbfdff 100%);border:1px solid var(--explorer-border);border-radius:18px;padding:24px;box-shadow:0 14px 42px rgba(10,22,38,.07)}
.content-toolbar{display:grid;grid-template-columns:minmax(280px,1fr) auto auto;gap:12px;align-items:stretch;margin-bottom:20px}
.content-search{position:relative;display:flex;align-items:center;min-width:0}
.content-search-icon{position:absolute;left:16px;color:var(--muted);font-size:22px;line-height:1;transform:rotate(-20deg);pointer-events:none}
.content-search input{width:100%;height:48px;border:1px solid var(--explorer-border);border-radius:11px;background:#f8fafc;padding:0 18px 0 46px;color:var(--navy-900);font:inherit;outline:none;transition:border-color .2s,box-shadow .2s,background .2s}
.content-search input:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(30,111,217,.11)}
.content-search input::placeholder{color:#8a99ab}
.content-sort{display:flex;align-items:center;gap:9px;height:48px;border:1px solid var(--explorer-border);border-radius:11px;background:#fff;padding:0 12px 0 15px;color:var(--muted);font-size:13px}
.content-sort select{border:0;background:transparent;color:var(--navy-900);font:600 14px/1 var(--font-sans);outline:none;cursor:pointer}
.content-reset{height:48px;padding:0 18px;border:1px solid var(--explorer-border);border-radius:11px;background:#fff;color:var(--blue);font:600 14px/1 var(--font-sans);cursor:pointer;transition:.2s}
.content-reset:hover{border-color:var(--blue);background:var(--bg-soft)}
.content-filter-group{display:grid;grid-template-columns:56px 1fr;gap:12px;align-items:start;padding:13px 0;border-top:1px solid #edf1f6}
.content-filter-label{padding-top:8px;color:var(--muted);font-size:13px;font-weight:600}
.content-filter-group .filter-tabs{justify-content:flex-start;gap:8px;margin:0}
.content-filter-group .filter-tab{display:inline-flex;align-items:center;gap:7px;padding:7px 13px;font-size:13px;background:#fff}
.content-filter-group .filter-tab.active{background:linear-gradient(135deg,var(--blue),var(--blue-light));color:#fff;border-color:transparent}
.content-filter-group .filter-tab span{min-width:18px;padding:1px 5px;border-radius:10px;background:#edf2f8;color:var(--muted);font:600 10px/1.4 var(--font-mono)}
.content-filter-group .filter-tab.active span{background:rgba(255,255,255,.2);color:#fff}
.active-filters{display:flex;flex-wrap:wrap;gap:8px;padding:12px 0 2px}
.active-filter{display:inline-flex;align-items:center;gap:7px;border:1px solid rgba(30,111,217,.22);border-radius:20px;background:var(--bg-soft);padding:6px 11px;color:var(--blue);font:600 12px/1 var(--font-sans);cursor:pointer}
.active-filter span{font-size:15px;line-height:1}
.content-result-bar{display:flex;justify-content:space-between;gap:16px;align-items:center;margin:18px 0 10px;padding-top:16px;border-top:1px solid #edf1f6;color:var(--muted);font-size:12.5px}
.content-result-bar>span:first-child{color:var(--navy-900);font-weight:600}
.content-explorer .tech-grid{display:block}
.content-article-list{border-top:1px solid var(--explorer-border)}
.content-article-item{display:grid;grid-template-columns:108px minmax(0,1fr) 38px;gap:22px;align-items:start;padding:24px 6px;border-bottom:1px solid var(--explorer-border);transition:background .2s,padding .2s}
.content-article-item:hover{background:#f7faff;padding-left:14px;padding-right:14px}
.content-article-date{padding-top:5px;color:var(--muted);font:500 12px/1.5 var(--font-mono)}
.content-article-meta{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:12px;margin-bottom:7px}
.content-article-meta span:first-child{color:var(--blue);font-weight:700}
.content-article-main h2{margin:0;font-size:19px;line-height:1.5}
.content-article-main h2 a{color:var(--navy-900);transition:color .2s}
.content-article-main h2 a:hover{color:var(--blue)}
.content-article-main p{margin-top:8px;color:var(--ink-soft);font-size:13.5px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.content-article-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:11px}
.content-article-tags span{padding:3px 8px;border-radius:4px;background:#f0f4f9;color:var(--muted);font-size:11px}
.content-article-arrow{display:grid;place-items:center;width:34px;height:34px;margin-top:9px;border:1px solid var(--explorer-border);border-radius:50%;color:var(--blue);transition:.2s}
.content-article-item:hover .content-article-arrow{color:#fff;background:var(--blue);border-color:var(--blue);transform:translateX(3px)}
.content-skeleton{min-height:132px;margin-bottom:12px;padding:24px;border:1px solid #edf1f6;border-radius:12px;background:#fff;overflow:hidden}
.content-skeleton i,.content-skeleton span{display:block;border-radius:5px;background:linear-gradient(90deg,#edf1f6 25%,#f8fafc 50%,#edf1f6 75%);background-size:200% 100%;animation:content-shimmer 1.3s infinite}
.content-skeleton i{width:18%;height:12px;margin-bottom:20px}.content-skeleton span{height:12px;margin-top:12px}.content-skeleton span:nth-child(2){width:72%;height:18px}.content-skeleton span:nth-child(3){width:92%}.content-skeleton span:nth-child(4){width:55%}
@keyframes content-shimmer{to{background-position:-200% 0}}
.content-empty{grid-column:1/-1;text-align:center;padding:70px 20px;border:1px dashed var(--explorer-border);border-radius:14px;background:#fbfdff;color:var(--ink-soft)}
.content-empty strong{display:block;color:var(--navy-900);font-size:18px;margin-bottom:8px}.content-empty p{margin-bottom:20px;font-size:14px}.content-error{background:#fffafa;border-color:#f0caca}
.content-explorer .news-pagination{margin-top:26px}

/* Lightweight knowledge map: native SVG, no graph framework or GPU required. */
.knowledge-map{margin-bottom:28px;padding:clamp(20px,3vw,30px);border:1px solid #dbe4f0;border-radius:18px;background:linear-gradient(145deg,#071629,#0d2a49);color:#fff;box-shadow:0 18px 48px rgba(5,20,38,.16);overflow:hidden}
.knowledge-map-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:20px}
.knowledge-map-head .section-tag{margin:0 0 8px;color:#64d8e6}
.knowledge-map-head h2{margin:0 0 8px;font-size:clamp(24px,3vw,34px);color:#fff}
.knowledge-map-head p:last-child{margin:0;max-width:680px;color:#b9c9da;line-height:1.7}
.knowledge-map-legend{display:flex;gap:12px;flex:none;color:#d8e3ef;font-size:12px}
.knowledge-map-legend span{display:inline-flex;align-items:center;gap:6px}
.knowledge-map-legend span::before{content:"";width:8px;height:8px;border-radius:50%;background:#7a8ba3}
.knowledge-map-legend .category::before{background:#1e6fd9}.knowledge-map-legend .topic::before{background:#15a5b8}
.knowledge-map-canvas{min-height:390px;border:1px solid rgba(255,255,255,.1);border-radius:14px;background:radial-gradient(circle at 45% 50%,rgba(30,111,217,.16),transparent 58%),rgba(1,10,22,.34);overflow:auto}
.knowledge-map-canvas svg{display:block;width:100%;min-width:720px;height:auto;min-height:390px}
.knowledge-map-edges line{stroke:#7590aa;opacity:.26}
.knowledge-map-node{cursor:pointer;outline:none}.knowledge-map-node text{fill:#dfeaf5;font-size:11px;font-family:inherit}.knowledge-map-node circle{transition:transform .18s ease,filter .18s ease;transform-box:fill-box;transform-origin:center}
.knowledge-map-node:hover circle,.knowledge-map-node:focus circle{transform:scale(1.45);filter:drop-shadow(0 0 7px rgba(100,216,230,.8))}.knowledge-map-node:hover text,.knowledge-map-node:focus text{fill:#fff;font-weight:700}
.knowledge-map-list{display:none}.knowledge-map-list h3{font-size:13px;margin:0 0 9px;color:#c5d5e6}.knowledge-map-chips{display:flex;flex-wrap:wrap;gap:8px}.knowledge-map-chips button{border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:8px 12px;background:rgba(255,255,255,.07);color:#fff;cursor:pointer}.knowledge-map-chips button.category{border-color:rgba(30,111,217,.7)}.knowledge-map-chips button.topic{border-color:rgba(21,165,184,.7)}

/* 文章详情页 */
.page-hero-sm{padding:calc(var(--header-h) + 40px) 0 48px}
.article-detail{max-width:820px;margin:0 auto;padding:0 24px}
.article-detail .breadcrumb{margin-bottom:20px;color:var(--muted)}
.article-detail .breadcrumb a{color:var(--blue)}
.article-detail .breadcrumb a:hover{color:var(--blue-light)}
.article-detail .breadcrumb span{color:var(--muted);opacity:1}
.article-cover{height:220px;border-radius:var(--radius);margin-bottom:28px;overflow:hidden}
.article-detail h1{font-family:var(--font-display);font-size:clamp(26px,3.4vw,36px);font-weight:700;color:var(--navy-900);line-height:1.3;margin-bottom:16px}
.article-meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--ink-soft);margin-bottom:16px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.art-author{color:var(--muted)}
.article-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}
.article-content{font-size:16px;color:var(--ink);line-height:1.95}
.article-content p{margin-bottom:16px}
.article-content h3{font-family:var(--font-display);font-size:20px;color:var(--navy-900);margin:26px 0 12px;font-weight:700}
.article-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:36px 0 20px;padding-top:24px;border-top:1px solid var(--line)}
.article-nav a{display:flex;flex-direction:column;gap:4px;padding:14px 18px;border:1px solid var(--line);border-radius:10px;background:#fff;transition:border-color .25s var(--ease),box-shadow .25s var(--ease)}
.article-nav a:hover{border-color:var(--blue);box-shadow:var(--shadow)}
.article-nav .an-next{text-align:right}
.article-nav span{font-size:12px;color:var(--muted);font-family:var(--font-mono)}
.article-nav strong{font-size:14px;color:var(--navy-900);font-weight:600;line-height:1.4}
.an-empty{visibility:hidden}
.article-back{text-align:center;margin-top:8px}

/* 正文元素（文章详情 + 新闻弹窗共用） */
.li{padding-left:20px;position:relative;color:var(--ink-soft);margin-bottom:14px}
.li::before{content:"•";position:absolute;left:4px;color:var(--blue);font-weight:700}
blockquote{margin:18px 0;padding:14px 20px;background:var(--bg-alt);border-left:3px solid var(--cyan);border-radius:0 10px 10px 0;color:var(--ink-soft);line-height:1.8}
.code-block{margin:18px 0;padding:18px 20px;background:var(--navy-900);border-radius:10px;overflow-x:auto}
.code-block code{font-family:var(--font-mono);font-size:13.5px;color:#e2e8f0;line-height:1.7;white-space:pre}

/* 响应式 */
@media (max-width:992px){
  .tech-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .content-explorer{padding:16px;border-radius:14px}
  .content-toolbar{grid-template-columns:1fr 1fr}.content-search{grid-column:1/-1}.content-sort{min-width:0}.content-sort span{display:none}.content-sort select{width:100%}
  .content-filter-group{grid-template-columns:1fr;gap:5px}.content-filter-label{padding-top:0}.content-result-bar>span:last-child{display:none}
  .content-article-item{grid-template-columns:1fr 32px;gap:10px;padding:19px 2px}.content-article-date{grid-column:1/-1;padding:0}.content-article-main h2{font-size:17px}.content-article-arrow{grid-column:2;grid-row:2;margin-top:4px}
  .tech-grid{grid-template-columns:1fr;gap:18px}
  .resource-grid{grid-template-columns:1fr;gap:18px}
  .article-nav{grid-template-columns:1fr;gap:12px}
  .article-nav .an-next{text-align:left}
  .filter-tabs{justify-content:flex-start;margin-bottom:28px}
}
@media (max-width:380px){
  .tech-grid,.resource-grid{grid-template-columns:1fr}
}