/* ============================================================
   北京慧测 · 但问智能 — 大模型应用测试实战训练营（第6期）
   企业级课程站点 · 共享样式（专业教育品牌风 · 去AI化）
   主色：深蓝 #1B4ED8 / 科技蓝 #2563EB · 点缀橙 #F97316
   ============================================================ */
:root{
  --primary:#1B4ED8;        /* 品牌深蓝 */
  --primary-2:#2563EB;      /* 科技蓝 */
  --primary-light:#EBF1FD;  /* 浅蓝底 */
  --accent:#F97316;         /* 点缀橙 */
  --accent-light:#FFF3EA;
  --green:#16A34A;
  --green-light:#EBF9F0;
  --purple:#7C3AED;
  --purple-light:#F3EEFD;
  --bg:#F5F7FB;             /* 页面浅灰底 */
  --surface:#FFFFFF;        /* 卡片白 */
  --text:#1A2333;           /* 主文字 */
  --text-dim:#5A6B84;       /* 次要文字 */
  --text-faint:#94A1B5;     /* 弱化文字 */
  --border:#E4E9F0;         /* 边框 */
  --border-strong:#CBD5E1;
  --shadow-sm:0 1px 3px rgba(16,42,94,.06);
  --shadow:0 4px 20px -2px rgba(16,42,94,.08);
  --shadow-lg:0 16px 44px -8px rgba(16,42,94,.14);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--text);
  -webkit-font-smoothing:antialiased;line-height:1.65;font-size:15.5px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:rgba(37,99,235,.18)}

/* ---------- 布局 ---------- */
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-sm{padding:56px 0}
.section-white{background:var(--surface)}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:100;background:var(--surface);
  border-bottom:1px solid var(--border);box-shadow:var(--shadow-sm)}
.nav-inner{max-width:1280px;margin:0 auto;padding:0 24px;height:68px;
  display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:1.05rem;color:var(--text)}
.nav-logo .brand-logo{width:44px;height:44px;border-radius:11px;flex-shrink:0;display:block;
  box-shadow:0 3px 10px rgba(37,99,235,.3)}
.nav-logo .brand-text{font-weight:800;font-size:1.08rem;color:var(--text);white-space:nowrap}
.nav-logo .sub{color:var(--primary);font-weight:800;font-size:1.08rem}
.nav-logo .amp{color:#F0B43A;font-weight:800;display:inline-block;margin:0 .18em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:9px 16px;border-radius:9px;font-size:.95rem;color:var(--text-dim);
  transition:all .2s;font-weight:500}
.nav-links a:hover{color:var(--primary);background:var(--primary-light)}
.nav-links a.active{color:var(--primary);background:var(--primary-light);font-weight:700}
.nav-cta{padding:13px 30px;border-radius:11px;font-weight:800;font-size:1.08rem;color:#fff !important;
  background:var(--primary);transition:all .25s;letter-spacing:.03em;
  box-shadow:0 3px 12px rgba(27,78,216,.35);text-shadow:0 1px 2px rgba(0,0,0,.18)}
/* 提高特异性，压过 .nav-links a 的通用样式 */
.nav-links a.nav-cta{padding:13px 30px;border-radius:11px;font-weight:800;font-size:1.08rem;
  color:#fff !important;background:var(--primary);letter-spacing:.03em;
  box-shadow:0 3px 12px rgba(27,78,216,.35);text-shadow:0 1px 2px rgba(0,0,0,.18)}
.nav-links a.nav-cta:hover{color:#fff !important;background:var(--primary-2);box-shadow:0 6px 22px rgba(27,78,216,.45);transform:translateY(-1px)}
.nav-cta:hover{background:var(--primary-2)}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer}

/* ---------- 文字强调色（克制使用） ---------- */
.t-primary{color:var(--primary)}
.t-accent{color:var(--accent)}
.t-green{color:var(--green)}
/* 旧渐变类 → 专业纯色（去AI化的关键：标题不再用彩虹渐变） */
.g-blue,.g-primary{color:var(--primary)}
.g-purple,.g-mix{color:var(--purple)}
.g-green{color:var(--green)}

/* 兼容补充的 icon-box 颜色 */
.ib-amber{background:var(--accent-light)}
.ib-pink{background:var(--purple-light)}
/* 兼容补充的 tag 颜色 */
.tag-amber{background:var(--accent-light);color:var(--accent)}
.tag-pink{background:var(--purple-light);color:var(--purple)}
.tag-red{background:#FDEBEB;color:#DC2626}

/* ---------- 通用 ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:700;
  letter-spacing:.1em;color:var(--primary);padding:6px 14px;border-radius:6px;
  background:var(--primary-light)}
.h-sec{font-size:clamp(1.7rem,3.6vw,2.5rem);font-weight:800;line-height:1.25;letter-spacing:0;color:var(--text)}
.lead{color:var(--text-dim);font-size:1.02rem;max-width:720px;line-height:1.75}
.center{text-align:center}
.mt-2{margin-top:8px}.mt-3{margin-top:12px}.mt-4{margin-top:16px}.mt-5{margin-top:24px}.mt-6{margin-top:32px}.mt-8{margin-top:48px}

/* ============================================================
   科技感细节（克制 · 精致 · 浅色基调）
   ============================================================ */
/* 渐变描边卡片：hover 时浮现蓝→青渐变边框 + 顶部高光 */
.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;
  transition:all .35s cubic-bezier(.34,1.2,.4,1);position:relative;overflow:hidden}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(37,99,235,.6),transparent);
  opacity:0;transition:opacity .35s}
.card::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(500px 140px at 50% -8%,rgba(37,99,235,.06),transparent);
  opacity:0;transition:opacity .35s}
.card:hover{border-color:var(--border-strong);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.card:hover::before,.card:hover::after{opacity:1}
.card-p{padding:28px}

/* 纯 CSS 几何图标（替代 emoji，去AI味） */
.gicon{width:48px;height:48px;border-radius:12px;position:relative;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary-light),#fff);
  border:1px solid var(--border)}
.gicon::before{content:"";width:20px;height:20px;border-radius:5px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:0 2px 8px rgba(37,99,235,.35)}
.gicon.gi-orange::before{background:linear-gradient(135deg,#FB923C,var(--accent));box-shadow:0 2px 8px rgba(249,115,22,.35)}
.gicon.gi-green::before{background:linear-gradient(135deg,#34D399,var(--green));box-shadow:0 2px 8px rgba(22,163,74,.35)}
.gicon.gi-purple::before{background:linear-gradient(135deg,#A78BFA,var(--purple));box-shadow:0 2px 8px rgba(124,58,237,.35)}
.mod-ic{margin:14px 0 12px}
/* 几何变体 */
.gicon.shape-circle::before{border-radius:50%}
.gicon.shape-ring::before{background:transparent;border:4px solid var(--primary);border-radius:50%;box-shadow:none}
.gicon.shape-diamond::before{transform:rotate(45deg);border-radius:4px}
.gicon.shape-tri::before{width:0;height:0;background:none;border-left:11px solid transparent;border-right:11px solid transparent;border-bottom:19px solid var(--primary);border-radius:0;box-shadow:none}
.gicon.shape-bars::before{width:20px;height:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary) 0 33%,transparent 33% 66%,var(--primary-2) 66% 100%);
  box-shadow:0 -7px 0 var(--primary),0 7px 0 var(--primary-2)}

/* 大尺寸几何图标（用于双轨/特色卡） */
.gicon-lg{width:56px;height:56px;border-radius:14px}
.gicon-lg::before{width:24px;height:24px}

/* 语义化 SVG 线性图标（专业、表意、去emoji） */
.sicon{width:48px;height:48px;border-radius:12px;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary-light),#fff);border:1px solid var(--border)}
.sicon svg{width:24px;height:24px;stroke:var(--primary);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.sicon.si-orange svg{stroke:var(--accent)}
.sicon.si-green svg{stroke:var(--green)}
.sicon.si-purple svg{stroke:var(--purple)}
.sicon-lg{width:56px;height:56px;border-radius:14px}
.sicon-lg svg{width:28px;height:28px}
.mod-ic{margin:14px 0 12px}

/* 科技感分隔条（标题左侧竖线 + 微光） */
.sec-title{display:flex;align-items:center;gap:14px}
.sec-title::before{content:"";width:5px;height:26px;border-radius:3px;
  background:linear-gradient(180deg,var(--primary),var(--primary-2));
  box-shadow:0 0 12px rgba(37,99,235,.4)}

.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 30px;border-radius:10px;
  font-weight:700;font-size:.98rem;transition:all .25s;cursor:pointer;border:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-2);box-shadow:0 8px 22px rgba(27,78,216,.32);transform:translateY(-2px)}
.btn-outline{background:var(--surface);border:1.5px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-light)}
.btn-ghost{background:var(--surface);border:1px solid var(--border-strong);color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-lg{padding:16px 40px;font-size:1.05rem;border-radius:11px}

.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.tag{display:inline-block;font-size:.74rem;font-weight:700;padding:4px 12px;border-radius:6px}
.tag-blue{background:var(--primary-light);color:var(--primary)}
.tag-orange{background:var(--accent-light);color:var(--accent)}
.tag-green{background:var(--green-light);color:var(--green)}
.tag-purple{background:var(--purple-light);color:var(--purple)}
.tag-gray{background:#F1F5F9;color:var(--text-dim)}

.icon-box{width:50px;height:50px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:1.4rem;flex-shrink:0}
.ib-blue{background:var(--primary-light)}
.ib-orange{background:var(--accent-light)}
.ib-green{background:var(--green-light)}
.ib-purple{background:var(--purple-light)}
.ib-gray{background:#F1F5F9}

/* ---------- 勾选列表 ---------- */
.ck{list-style:none}
.ck li{padding:8px 0;color:var(--text-dim);font-size:.95rem;display:flex;gap:11px;align-items:flex-start}
.ck li::before{content:"✓";color:var(--green);font-weight:900;flex-shrink:0;margin-top:1px}
.ck li strong{color:var(--text);font-weight:700;white-space:nowrap;flex-shrink:0}

/* ---------- 页头（内页） ---------- */
.page-hero{padding:64px 0 48px;background:var(--surface);border-bottom:1px solid var(--border)}
.crumb{font-size:.85rem;color:var(--text-faint);margin-bottom:16px}
.crumb a{color:var(--text-dim)}
.crumb a:hover{color:var(--primary)}
.page-title{font-size:clamp(1.9rem,4.2vw,2.9rem);font-weight:800;line-height:1.2;color:var(--text)}
.page-sub{color:var(--text-dim);font-size:1.02rem;max-width:780px;margin-top:16px;line-height:1.75}

/* ---------- Hero（首页，浅色科技感） ---------- */
.hero{padding:80px 0 88px;position:relative;overflow:hidden;
  background:linear-gradient(180deg,#EAF0FB 0%,#F5F7FB 100%)}
/* 细网格 + 顶部光晕（克制的科技感） */
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(37,99,235,.05) 1px,transparent 1px),
  linear-gradient(90deg,rgba(37,99,235,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 88%);
  mask-image:linear-gradient(180deg,#000,transparent 88%)}
.hero::after{content:"";position:absolute;right:-160px;top:-160px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(37,99,235,.14),transparent 62%);pointer-events:none}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);
  padding:7px 16px;border-radius:99px;font-size:.85rem;font-weight:600;color:var(--primary);box-shadow:var(--shadow-sm)}
.hero-badge .pulse{width:8px;height:8px;border-radius:50%;background:var(--green);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(22,163,74,.4)}50%{box-shadow:0 0 0 6px rgba(22,163,74,0)}}

/* 按钮微光（科技感） */
.btn-primary{position:relative;overflow:hidden}
.btn-primary::after{content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;
  background:linear-gradient(105deg,transparent,rgba(255,255,255,.35),transparent);
  transform:skewX(-20deg);transition:left .5s}
.btn-primary:hover::after{left:130%}

/* Hero 左右双栏 */
.hero-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:56px;align-items:center}
.hero-visual{display:flex;justify-content:center}

/* 架构可视化卡片（终端窗口 + 发光节点，科技感） */
.hv-card{width:100%;max-width:420px;background:#0F1B33;border-radius:18px;overflow:hidden;
  box-shadow:0 24px 64px -16px rgba(15,27,51,.4),0 0 0 1px rgba(37,99,235,.2);
  transform:perspective(1200px) rotateY(-6deg) rotateX(2deg);transition:transform .5s ease}
.hero-visual:hover .hv-card{transform:perspective(1200px) rotateY(-2deg) rotateX(0deg)}
.hv-head{display:flex;align-items:center;gap:7px;padding:13px 18px;background:rgba(255,255,255,.05);
  border-bottom:1px solid rgba(255,255,255,.08)}
.hv-dot{width:11px;height:11px;border-radius:50%}
.hv-title{margin-left:8px;font-family:ui-monospace,monospace;font-size:.78rem;color:#7FB2FF;font-weight:600}
.hv-body{padding:24px 22px;display:flex;flex-direction:column;gap:4px}
.hv-node{padding:15px 18px;border-radius:12px;border:1px solid;transition:all .3s}
.hv-node:hover{transform:translateX(4px)}
.hv-a{background:rgba(37,99,235,.14);border-color:rgba(59,130,246,.4)}
.hv-b{background:rgba(124,58,237,.14);border-color:rgba(139,92,246,.4)}
.hv-c{background:rgba(22,163,74,.12);border-color:rgba(34,197,94,.35)}
.hv-node-t{font-weight:800;font-size:1rem;color:#fff}
.hv-node-d{font-size:.8rem;color:#9AA9C2;margin-top:3px;font-family:ui-monospace,monospace}
/* 节点间真实连线（替代随意箭头） */
.hv-link{align-self:center;width:2px;height:18px;position:relative;
  background:linear-gradient(180deg,rgba(94,200,255,.7),rgba(94,200,255,.2))}
.hv-link::after{content:"";position:absolute;bottom:-1px;left:50%;transform:translateX(-50%);
  border-left:5px solid transparent;border-right:5px solid transparent;
  border-top:6px solid rgba(94,200,255,.7)}

/* 技术徽章（flex + gap，图标与文字永不相撞） */
.tech-chip{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:8px;
  font-size:.82rem;font-weight:600;font-family:ui-monospace,SFMono-Regular,monospace;
  background:#F1F5F9;border:1px solid var(--border);color:var(--text-dim);transition:all .2s}
.tech-chip::before{content:"";flex-shrink:0;width:7px;height:7px;border-radius:2px;
  background:var(--primary);opacity:.8}
.tech-chip:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary);
  box-shadow:0 4px 14px rgba(37,99,235,.18)}

/* ---------- 统计数字 ---------- */
.stat-num{font-size:2.5rem;font-weight:800;line-height:1;color:var(--primary)}

/* ---------- 模块卡片 ---------- */
.mod-card{display:flex;flex-direction:column;height:100%}
.mod-num{font-family:ui-monospace,monospace;font-size:.76rem;color:var(--text-faint);font-weight:700;letter-spacing:.1em}
.mod-icon{width:46px;height:46px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  font-size:1.35rem;margin:14px 0 12px;background:var(--primary-light)}
.mod-title{font-size:1.2rem;font-weight:800;line-height:1.3;color:var(--text)}
.mod-desc{color:var(--text-dim);font-size:.9rem;margin-top:10px;flex:1;line-height:1.65}
.mod-meta{display:flex;align-items:center;gap:9px;margin-top:16px;flex-wrap:wrap}
.mod-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:.88rem;font-weight:700;color:var(--primary);transition:gap .2s}
.mod-link:hover{gap:10px}

/* ---------- 特性小条 ---------- */
.feat-row{display:flex;gap:11px;align-items:flex-start;padding:8px 0;font-size:.92rem;color:var(--text-dim)}
.feat-row .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);margin-top:8px;flex-shrink:0}

/* ---------- 技术徽章容器 ---------- */
.tech-cloud{display:flex;flex-wrap:wrap;gap:9px}

/* 技术亮点条目 */
.tech-point{display:flex;gap:13px;padding:12px 0;border-bottom:1px solid var(--border);align-items:flex-start}
.tech-point:last-child{border-bottom:none}
.tech-point .tp-ic{width:36px;height:36px;border-radius:9px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  font-size:1.05rem;background:var(--primary-light)}
.tech-point .tp-t{font-weight:700;font-size:.95rem;color:var(--text)}
.tech-point .tp-d{font-size:.85rem;color:var(--text-dim);margin-top:3px;line-height:1.6}
.tech-point .tp-d code{color:var(--primary);font-family:ui-monospace,monospace;font-size:.8rem;background:var(--primary-light);padding:1px 6px;border-radius:5px}

/* ---------- 表格 ---------- */
.tbl-wrap{overflow-x:auto;border-radius:14px;border:1px solid var(--border);background:var(--surface)}
table.tbl{width:100%;border-collapse:collapse;font-size:.9rem}
.tbl th{background:var(--primary-light);color:var(--primary);font-weight:700;padding:14px 16px;text-align:left;border-bottom:1px solid var(--border)}
.tbl td{padding:13px 16px;border-bottom:1px solid var(--border);color:var(--text-dim);vertical-align:top}
.tbl tr:last-child td{border-bottom:none}
.tbl td.strong{color:var(--text);font-weight:600}

/* ---------- 页脚（专业深色） ---------- */
.footer{background:#0F1B33;color:#C6D0E0;padding:64px 0 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:44px}
.footer h4{font-size:.95rem;font-weight:800;margin-bottom:18px;color:#fff}
.footer a,.footer p{color:#9AA9C2;font-size:.89rem;display:block;padding:5px 0;transition:color .2s}
.footer a:hover{color:#fff}
.footer-brand p{margin-top:14px;line-height:1.7}
.footer .nav-logo{color:#fff}
.footer-qr{width:104px;height:104px;border-radius:12px;overflow:hidden;background:#fff;padding:6px}
.footer-qr img{width:100%;height:100%;object-fit:cover;border-radius:7px}
.footer-bottom{margin-top:48px;padding-top:26px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;color:#6B7A95;font-size:.83rem}
.footer-bottom a{color:#6B7A95}
.footer-bottom a:hover{color:#fff}

/* ---------- 动效（克制的淡入，含无JS/无滚动兜底） ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
/* 无 JS 时全部直接可见 */
.no-js .reveal{opacity:1;transform:none}
/* 支持减少动态偏好的用户直接显示 */
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- CTA 横幅 ---------- */
.cta-banner{position:relative;border-radius:22px;overflow:hidden;text-align:center;
  background:linear-gradient(135deg,var(--primary) 0%,#2B5FE0 60%,#3B76F0 100%);padding:64px 44px;color:#fff;box-shadow:var(--shadow-lg)}
.cta-banner .lead{color:rgba(255,255,255,.85)}
.cta-banner::after{content:"";position:absolute;right:-100px;bottom:-100px;width:380px;height:380px;border-radius:50%;
  background:rgba(255,255,255,.08)}

/* ---------- 报名弹窗 ---------- */
.modal-mask{position:fixed;inset:0;z-index:200;background:rgba(15,27,51,.55);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;padding:24px;
  opacity:0;pointer-events:none;transition:opacity .3s}
.modal-mask.open{opacity:1;pointer-events:auto}
.modal{background:#fff;border-radius:20px;padding:38px;max-width:390px;width:100%;text-align:center;position:relative;
  transform:translateY(20px);transition:transform .3s ease;box-shadow:0 30px 80px -20px rgba(15,27,51,.5)}
.modal-mask.open .modal{transform:translateY(0)}
.modal-close{position:absolute;top:16px;right:16px;background:#F1F5F9;border:none;
  width:36px;height:36px;border-radius:9px;color:var(--text-dim);font-size:1.05rem;cursor:pointer;transition:all .2s}
.modal-close:hover{color:var(--text);background:#E2E8F0}
.modal-qr{width:225px;height:225px;margin:20px auto;border-radius:14px;overflow:hidden;
  border:1px solid var(--border);background:#fff;padding:10px}
.modal-qr img{width:100%;height:100%;object-fit:cover;border-radius:8px}
.wx-ids{display:flex;gap:10px;justify-content:center;margin-top:16px;flex-wrap:wrap}
.wx-id{padding:8px 18px;border-radius:9px;background:var(--primary-light);border:1px solid var(--border);
  font-family:ui-monospace,monospace;font-size:.9rem;color:var(--primary);font-weight:700}

/* ---------- 分隔标题（带竖线） ---------- */
.sec-title{display:flex;align-items:center;gap:14px}
.sec-title::before{content:"";width:5px;height:26px;border-radius:3px;background:var(--primary)}

/* ---------- 学员作品展示 Showcase ---------- */
.sc-tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.sc-tab{padding:9px 20px;border-radius:99px;border:1px solid var(--border);background:var(--surface);
  color:var(--text-dim);font-size:.9rem;font-weight:600;cursor:pointer;transition:all .25s;
  display:inline-flex;align-items:center;gap:7px}
.sc-tab:hover{border-color:var(--primary-2);color:var(--primary)}
.sc-tab.on{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 4px 14px -2px rgba(27,78,216,.4)}
.sc-tab .sc-cnt{font-size:.78rem;opacity:.75;font-weight:500}
.sc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sc-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden;
  cursor:zoom-in;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;display:flex;flex-direction:column}
.sc-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--border-strong)}
.sc-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:#0E1526}
.sc-thumb img{width:100%;height:100%;object-fit:cover;object-position:top center;transition:transform .5s ease}
.sc-card:hover .sc-thumb img{transform:scale(1.045)}
.sc-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(10,17,34,.42),transparent 42%);pointer-events:none}
.sc-cat{position:absolute;top:12px;left:12px;z-index:2;padding:4px 11px;border-radius:7px;font-size:.72rem;font-weight:700;
  backdrop-filter:blur(6px);letter-spacing:.02em}
.sc-cat-test{background:rgba(27,78,216,.85);color:#fff}
.sc-cat-kg{background:rgba(124,58,237,.85);color:#fff}
.sc-cat-agent{background:rgba(22,163,74,.85);color:#fff}
.sc-cat-voice{background:rgba(249,115,22,.88);color:#fff}
.sc-zoom{position:absolute;right:12px;bottom:12px;z-index:2;width:32px;height:32px;border-radius:9px;
  background:rgba(255,255,255,.92);display:flex;align-items:center;justify-content:center;
  opacity:0;transform:translateY(6px);transition:all .25s}
.sc-card:hover .sc-zoom{opacity:1;transform:translateY(0)}
.sc-zoom svg{width:16px;height:16px;stroke:var(--primary);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.sc-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:7px;flex:1}
.sc-title{font-weight:800;font-size:1.02rem;line-height:1.4}
.sc-desc{font-size:.84rem;color:var(--text-dim);line-height:1.65;flex:1}
.sc-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
.sc-tag{font-size:.72rem;padding:3px 9px;border-radius:6px;background:var(--primary-light);color:var(--primary);font-weight:600}
.sc-card.sc-hide{display:none}
/* 灯箱 */
.sc-lightbox{position:fixed;inset:0;z-index:300;background:rgba(10,17,34,.88);backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;padding:36px;
  opacity:0;pointer-events:none;transition:opacity .3s}
.sc-lightbox.open{opacity:1;pointer-events:auto}
.sc-lb-inner{max-width:min(1180px,94vw);max-height:90vh;display:flex;flex-direction:column;gap:12px;
  transform:scale(.96);transition:transform .3s ease}
.sc-lightbox.open .sc-lb-inner{transform:scale(1)}
.sc-lb-inner img{max-width:100%;max-height:78vh;object-fit:contain;border-radius:12px;box-shadow:0 30px 90px -20px rgba(0,0,0,.7);background:#0E1526}
.sc-lb-cap{color:#C7D2E8;font-size:.9rem;text-align:center;line-height:1.6}
.sc-lb-cap strong{color:#fff;font-size:1.02rem}
.sc-lb-close{position:absolute;top:22px;right:24px;width:42px;height:42px;border-radius:11px;border:1px solid rgba(255,255,255,.25);
  background:rgba(255,255,255,.1);color:#fff;font-size:1.2rem;cursor:pointer;transition:all .2s}
.sc-lb-close:hover{background:rgba(255,255,255,.22)}
.sc-lb-prev,.sc-lb-next{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:12px;
  border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.1);color:#fff;font-size:1.5rem;cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:all .2s;line-height:1;padding-bottom:3px}
.sc-lb-prev:hover,.sc-lb-next:hover{background:rgba(255,255,255,.22)}
.sc-lb-prev{left:18px}
.sc-lb-next{right:18px}

/* ============================================================
   技术串联主线图（深色科技面板 · 发光节点 + 流动脉冲连线）
   ============================================================ */
.flow-panel{background:#0F1B33;border-radius:20px;padding:40px 36px;position:relative;overflow:hidden;
  box-shadow:0 24px 60px -18px rgba(15,27,51,.45),0 0 0 1px rgba(37,99,235,.25)}
.flow-panel::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(94,200,255,.055) 1px,transparent 1px),
  linear-gradient(90deg,rgba(94,200,255,.055) 1px,transparent 1px);background-size:36px 36px}
.flow-panel::after{content:"";position:absolute;left:50%;top:-130px;width:560px;height:260px;
  transform:translateX(-50%);background:radial-gradient(closest-side,rgba(59,130,246,.28),transparent);pointer-events:none}
.flow-head{position:relative;z-index:1;text-align:center;margin-bottom:30px}
.flow-head h3{color:#fff;font-size:1.35rem;font-weight:900;letter-spacing:.01em}
.flow-head p{color:#9AA9C2;font-size:.92rem;margin-top:8px}
.flow-chain{display:flex;align-items:stretch;position:relative;z-index:1}
.flow-node{flex:1;background:rgba(255,255,255,.05);border:1px solid rgba(127,178,255,.28);
  border-radius:14px;padding:18px 14px 16px;text-align:center;transition:all .3s}
.flow-node:hover{background:rgba(59,130,246,.16);border-color:rgba(127,178,255,.65);
  transform:translateY(-4px);box-shadow:0 12px 30px -10px rgba(37,99,235,.55)}
.fn-step{font-family:ui-monospace,monospace;font-size:.68rem;letter-spacing:.14em;color:#5EC8FF;font-weight:700}
.fn-t{color:#fff;font-weight:800;font-size:1rem;margin-top:6px;line-height:1.35}
.fn-d{color:#9AA9C2;font-size:.79rem;margin-top:5px;line-height:1.55}
.fn-mod{display:inline-block;margin-top:9px;font-size:.7rem;font-weight:700;color:#FDBA74;
  background:rgba(249,115,22,.14);border:1px solid rgba(249,115,22,.4);padding:2px 10px;border-radius:99px}
.flow-conn{align-self:center;width:30px;height:2px;flex-shrink:0;margin:0 4px;position:relative;
  background:linear-gradient(90deg,rgba(94,200,255,.25),rgba(94,200,255,.85))}
.flow-conn::after{content:"";position:absolute;right:-1px;top:50%;transform:translateY(-50%);
  border-left:6px solid rgba(94,200,255,.85);border-top:4.5px solid transparent;border-bottom:4.5px solid transparent}
.flow-conn::before{content:"";position:absolute;top:-2.5px;left:0;width:7px;height:7px;border-radius:50%;
  background:#5EC8FF;box-shadow:0 0 10px #5EC8FF;animation:flowPulse 2.4s linear infinite}
@keyframes flowPulse{to{left:calc(100% - 7px)}}
@keyframes flowPulseV{to{top:calc(100% - 7px)}}
/* 脉冲依次出发，形成"流动"感 */
.flow-chain>*:nth-child(4)::before{animation-delay:.8s}
.flow-chain>*:nth-child(6)::before{animation-delay:1.6s}
.flow-chain>*:nth-child(8)::before{animation-delay:2.4s}
@media (prefers-reduced-motion: reduce){
  .flow-conn::before{animation:none;opacity:0}
}

/* ============================================================
   镇课项目高亮卡（渐变描边 + 角部绶带）
   ============================================================ */
.proj-flagship{border:1.5px solid transparent;
  background:linear-gradient(var(--surface),var(--surface)) padding-box,
  linear-gradient(120deg,var(--primary),var(--purple) 55%,var(--primary-2)) border-box;
  box-shadow:0 18px 50px -16px rgba(27,78,216,.3)}
.proj-flagship:hover{transform:translateY(-4px);box-shadow:0 28px 66px -18px rgba(27,78,216,.42)}
.ribbon{position:absolute;top:20px;right:-38px;transform:rotate(45deg);z-index:2;
  background:linear-gradient(135deg,#FB923C,var(--accent));color:#fff;font-size:.74rem;font-weight:800;
  letter-spacing:.12em;padding:6px 44px;box-shadow:0 6px 16px rgba(249,115,22,.45)}

/* ---------- 紧凑模块行（课程模块页：一屏看清全部模块） ---------- */
.mod-list{display:flex;flex-direction:column;gap:12px}
.mod-row{display:flex;align-items:center;gap:18px;padding:15px 22px}
.mod-row .gicon{width:38px;height:38px;border-radius:10px}
.mod-row .gicon::before{width:16px;height:16px}
.mod-row .gicon.shape-ring::before{border-width:3px}
.mod-row .gicon.shape-tri::before{border-left-width:9px;border-right-width:9px;border-bottom-width:15px}
.mr-head{flex-shrink:0;width:180px}
.mr-head .mod-num{display:block}
.mr-title{font-size:1.08rem;font-weight:800;color:var(--text);margin-top:2px;white-space:nowrap}
.mr-desc{flex:1;min-width:0;color:var(--text-dim);font-size:.88rem;line-height:1.6}
.mod-row .tag{flex-shrink:0}
.mr-arrow{flex-shrink:0;color:var(--primary);font-weight:800;transition:transform .2s}
.mod-row:hover .mr-arrow{transform:translateX(4px)}

/* ---------- 首页模块卡紧凑版 ---------- */
.mod-card.compact{padding:18px 20px}
.mod-card.compact .mod-ic{margin:10px 0 8px;width:38px;height:38px;border-radius:10px}
.mod-card.compact .mod-ic svg{width:20px;height:20px}
.mod-card.compact .mod-title{font-size:1.05rem}
.mod-card.compact .mod-desc{font-size:.85rem;margin-top:6px;line-height:1.55}
.mod-card.compact .mod-link{margin-top:10px;font-size:.82rem}
.mod-card.compact .mod-num{font-size:.7rem}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .sc-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1}
  .hv-card{transform:none;max-width:480px}
  /* 串联图转为纵向流 */
  .flow-chain{flex-direction:column}
  .flow-conn{width:2px;height:26px;margin:4px auto;align-self:center;
    background:linear-gradient(180deg,rgba(94,200,255,.25),rgba(94,200,255,.85))}
  .flow-conn::after{right:auto;top:auto;left:50%;bottom:-1px;transform:translateX(-50%);
    border-left:4.5px solid transparent;border-right:4.5px solid transparent;
    border-top:6px solid rgba(94,200,255,.85);border-bottom:none}
  .flow-conn::before{left:-2.5px;top:0;animation-name:flowPulseV}
}
@media(max-width:640px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  .mod-row{flex-wrap:wrap;gap:10px 14px;padding:16px 18px}
  .mr-head{width:auto}
  .mr-desc{flex-basis:100%;order:3}
  .mr-arrow{display:none}
  .sc-grid{grid-template-columns:1fr}
  .sc-lb-prev{left:6px}
  .sc-lb-next{right:6px}
  .sc-lb-prev,.sc-lb-next{width:38px;height:38px}
  .section{padding:56px 0}
  .nav-links{display:none;position:absolute;top:68px;left:0;right:0;flex-direction:column;
    background:#fff;padding:14px;border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .cta-banner{padding:44px 24px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .hero{padding:48px 0 56px}
  .page-hero{padding:48px 0 36px}
}