/* 人工智能训练师证书报名入口 - 落地页样式 v2 */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter','Microsoft YaHei','PingFang SC',system-ui,sans-serif;color:#374151;background:#f9fafb;line-height:1.7;font-size:15px}
a{color:#2563eb;text-decoration:none}
img{max-width:100%}
.container{max-width:1120px;margin:0 auto;padding:0 16px}
.header{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.06);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px}
.logo-text{font-size:17px;font-weight:700;color:#1e3a5f;line-height:1.25}
.logo-sub{font-size:11px;color:#6b7280;line-height:1.2;margin-top:2px}
.nav{display:flex;align-items:center;gap:20px;font-size:14px}
.nav a{display:inline-flex;align-items:center;line-height:1;padding:10px 2px;font-weight:500;color:#4b5563;transition:color .2s;white-space:nowrap}
.nav a:hover,.nav a.active{color:#2563eb}
.nav-cta{background:#f97316;color:#fff!important;border-radius:8px}
.nav a.nav-cta{padding:10px 22px}
.nav-cta:hover{background:#ea580c;color:#fff!important}
.menu-btn{display:none;align-items:center;justify-content:center;width:44px;height:44px;background:none;border:none;font-size:22px;color:#374151;cursor:pointer}
.hero{background:linear-gradient(135deg,#1e3a5f 0%,#2563eb 100%);color:#fff;padding:52px 0 46px}
.crumbs{font-size:13px;color:#bfdbfe;margin-bottom:18px}
.crumbs a{color:#bfdbfe}
.crumbs a:hover{color:#fff}
.crumbs .fa{margin:0 6px;font-size:11px}
.hero h1{font-size:30px;font-weight:700;line-height:1.4;margin-bottom:12px}
.hero .lead{font-size:16px;color:#dbeafe;max-width:800px;margin-bottom:24px}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:8px;font-size:15px;font-weight:500;transition:all .25s;border:none;cursor:pointer}
.btn-orange{background:#f97316;color:#fff}
.btn-orange:hover{background:#ea580c;transform:translateY(-1px)}
.btn-line{background:transparent;border:1.5px solid rgba(255,255,255,.55);color:#fff}
.btn-line:hover{background:rgba(255,255,255,.12)}
.btn-blue{background:#2563eb;color:#fff}
.btn-blue:hover{background:#1d4ed8;transform:translateY(-1px)}
.btn-ghost{background:#fff;border:1.5px solid #bfdbfe;color:#2563eb}
.btn-ghost:hover{background:#eff6ff}
.hero-meta{display:flex;flex-wrap:wrap;gap:16px;margin-top:22px;font-size:13px;color:#bfdbfe}
.hero-meta span{display:inline-flex;align-items:center;gap:6px}
.official{background:#fff;border-bottom:1px solid #eef2f7;padding:14px 0}
.official-inner{display:flex;flex-wrap:wrap;align-items:center;gap:10px 26px;font-size:13px}
.ob-item{display:inline-flex;align-items:center;gap:7px;color:#4b5563}
.ob-item .fa{color:#2563eb}
.ob-item a{color:#2563eb;font-weight:500}
.ob-note{width:100%;color:#9ca3af;font-size:12px;margin-top:6px}
.section{padding:46px 0}
.section-white{background:#fff}
.section h2{font-size:23px;font-weight:700;color:#1e3a5f;margin-bottom:10px;padding-left:14px;border-left:4px solid #2563eb}
.section h3{font-size:17px;font-weight:600;color:#1e3a5f;margin-bottom:10px}
.sec-sub{color:#6b7280;font-size:14px;margin-bottom:24px}
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid #eef2f7;border-radius:12px;padding:22px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.card .fa{color:#2563eb;font-size:22px;margin-bottom:10px}
.card h3{font-size:16px}
.card p{font-size:14px;color:#6b7280;margin-top:6px}
.primary-card{background:linear-gradient(135deg,#2563eb 0%,#3b82f6 100%);color:#fff;border:none}
.primary-card .fa,.primary-card h3,.primary-card p{color:#fff}
.primary-card p{color:#dbeafe}
.entry-box{border:1px solid #dbeafe;border-radius:12px;overflow:hidden;margin-bottom:16px}
.entry-head{background:#eff6ff;padding:14px 20px;font-weight:600;color:#1e3a5f;font-size:16px}
.entry-head .fa{color:#2563eb;margin-right:8px}
.entry-body{padding:20px}
.entry-url{background:#f8fafc;border:1px dashed #bfdbfe;border-radius:8px;padding:12px 16px;font-size:15px;color:#1e40af;word-break:break-all;margin-bottom:12px}
.entry-url .fa{margin-right:8px;color:#2563eb}
.notice-box{background:#fff7ed;border:1px solid #fed7aa;border-radius:10px;padding:14px 16px;font-size:14px;color:#9a3412;margin-top:14px}
.notice-box .fa{color:#ea580c;margin-right:8px}
.notice-box a{color:#c2410c;font-weight:600;text-decoration:underline}
.policy-box{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:10px;padding:14px 16px;font-size:14px;color:#166534;margin-top:14px}
.policy-box .fa{color:#16a34a;margin-right:8px}
.table-wrap{overflow-x:auto;border:1px solid #eef2f7;border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:640px}
th{background:#f8fafc;color:#1e3a5f;font-weight:600;text-align:left;padding:12px 16px;border-bottom:1px solid #eef2f7;white-space:nowrap}
td{padding:12px 16px;border-bottom:1px solid #f3f4f6;vertical-align:top}
tr:last-child td{border-bottom:none}
td b{color:#1e3a5f}
.level-tag{display:inline-block;background:#eff6ff;color:#2563eb;border-radius:6px;padding:2px 10px;font-size:13px;font-weight:600;margin-right:6px}
.money{color:#f97316;font-weight:700;font-size:16px}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.step{background:#fff;border:1px solid #eef2f7;border-radius:12px;padding:18px;text-align:center;position:relative}
.step-num{width:34px;height:34px;border-radius:50%;background:#2563eb;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;margin:0 auto 10px}
.step h3{font-size:15px;margin-bottom:6px}
.step p{font-size:13px;color:#6b7280;margin:0}
.faq-item{border:1px solid #eef2f7;border-radius:10px;margin-bottom:10px;background:#fff;overflow:hidden}
.faq-item summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:500;color:#1e3a5f;display:flex;justify-content:space-between;align-items:center;gap:10px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .fa{color:#9ca3af;transition:transform .25s;flex-shrink:0}
.faq-item[open] summary .fa{transform:rotate(180deg)}
.faq-item .a{padding:0 18px 16px;font-size:14px;color:#6b7280;line-height:1.8}
.form-frame-wrap{border:1px solid #eef2f7;border-radius:12px;overflow:hidden;background:#fff}
.form-frame{width:100%;height:640px;border:none;display:block}
.form-fallback{display:none;padding:32px 20px;text-align:center}
.form-fallback p{color:#6b7280;margin-bottom:16px}
.notice-final{background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:16px 20px;font-size:13px;color:#92400e;margin:0}
.notice-final .fa{color:#f59e0b;margin-right:8px}
.footer{background:#111827;color:#d1d5db;padding:48px 0 0;margin-top:0}
.footer h3{font-size:16px;color:#fff;font-weight:600;margin-bottom:24px}
.footer p{font-size:14px;line-height:1.8;color:#9ca3af}
.footer ul{list-style:none}
.footer ul li{margin-bottom:10px}
.footer ul a{color:#9ca3af;font-size:14px;transition:color .2s}
.footer ul a:hover{color:#60a5fa}
.footer ul li .fa{margin-right:8px;color:#6b7280;font-size:12px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px;padding-bottom:36px}
.footer-bottom{border-top:1px solid #1f2937;padding:18px 0;font-size:13px;color:#6b7280;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px}
.footer-bottom a{color:#9ca3af}
.footer-bottom a:hover{color:#60a5fa}
.back-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:10px;background:#2563eb;color:#fff;border:none;font-size:18px;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(37,99,235,.35);z-index:99}
.back-top.show{display:flex}
@media (max-width:768px){
  .nav{display:none}
  .menu-btn{display:flex}
  .nav.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#fff;padding:12px 20px 20px;box-shadow:0 8px 16px rgba(0,0,0,.08);gap:0}
  .nav.open a{display:flex;align-items:center;padding:13px 2px;border-bottom:1px solid #f3f4f6;line-height:1}
  .nav.open a:last-child{border-bottom:none}
  .hero h1{font-size:24px}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .hero{padding:38px 0 34px}
  .form-frame{height:720px}
}
@media (max-width:480px){
  .footer-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
}