/* deltaecho.cn 独有页面（实训营报名、关于我们、联系我们）共用样式；只进备案站，不进 deltaecho.ai 母本 */
:root{--ink:#0f172a;--muted:#475569;--line:#e2e8f0;--bg:#ffffff;--soft:#f8fafc;--accent:#0e7490;--accent-ink:#083344;--amber:#b45309}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif}
a{color:var(--accent)}
.wrap{max-width:920px;margin:0 auto;padding:0 20px}
header.top{border-bottom:1px solid var(--line);background:#fff}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px}
.brand{font-weight:700;letter-spacing:.02em;color:var(--ink);text-decoration:none;white-space:nowrap}
.brand small{font-weight:400;color:var(--muted);margin-left:8px}
.site-nav a{color:var(--muted);text-decoration:none;margin-left:20px;font-size:14px;white-space:nowrap}
.site-nav a:hover,.site-nav a[aria-current=page]{color:var(--accent)}
.site-nav a[aria-current=page]{font-weight:600}
@media(max-width:680px){
  header.top .wrap{flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
  .brand small{display:none}
  .site-nav{width:100%;display:flex;gap:18px;overflow-x:auto}
  .site-nav a{margin-left:0}
}
.hero{padding:56px 0 32px;border-bottom:1px solid var(--line)}
.eyebrow{font-size:13px;letter-spacing:.14em;color:var(--accent);margin:0 0 12px}
h1{font-size:34px;line-height:1.3;margin:0 0 12px}
@media(max-width:680px){h1{font-size:28px}.hero{padding:36px 0 28px}}
.lead{font-size:18px;color:var(--muted);margin:0 0 28px;max-width:680px}
.buy{display:grid;grid-template-columns:1fr;gap:20px;border:1px solid var(--line);border-radius:16px;padding:24px;background:var(--soft)}
@media(min-width:720px){.buy{grid-template-columns:1.2fr 1fr}}
.price{font-size:14px;color:var(--muted)}
.price .now{display:block;font-size:40px;font-weight:700;color:var(--ink);line-height:1.1;margin:4px 0}
.price .now small{font-size:18px;font-weight:500;margin-right:2px}
.price .code{display:inline-block;margin-top:10px;padding:6px 10px;border-radius:999px;background:#fff7ed;color:var(--amber);font-size:13px;border:1px solid #fed7aa}
.cta{align-self:center}
.btn{display:inline-block;padding:14px 22px;border-radius:12px;background:var(--accent);color:#fff;text-decoration:none;font-weight:600}
.btn.ghost{background:#fff;color:var(--accent);border:1px solid var(--accent)}
.note{font-size:13px;color:var(--muted);margin-top:10px}
section{padding:40px 0;border-bottom:1px solid var(--line)}
section:last-child{border-bottom:0}
h2{font-size:22px;margin:0 0 16px}
ul{padding-left:1.2em;margin:0}
li{margin:6px 0}
.grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:720px){.grid{grid-template-columns:repeat(3,1fr)}.grid.two{grid-template-columns:repeat(2,1fr)}}
.card{border:1px solid var(--line);border-radius:14px;padding:18px;background:#fff}
.card b{display:block;margin-bottom:6px}
.card p{margin:0;color:var(--muted);font-size:15px}
.card p + p{margin-top:8px}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:500;width:30%}
td{word-break:break-word}
footer{padding:28px 0 40px;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
footer a{color:inherit}
footer .foot-links{display:flex;flex-wrap:wrap;gap:8px 20px;margin:0 0 8px}
footer .foot-links a{text-decoration:none}
footer .foot-links a:hover{text-decoration:underline}
footer p{margin:0}

/* ===== 商城：商品卡、表单、订单与支付 ===== */
.products{display:grid;gap:20px;grid-template-columns:1fr}
@media(min-width:760px){.products{grid-template-columns:repeat(2,1fr)}}
.product{border:1px solid var(--line);border-radius:16px;padding:24px;background:#fff;display:flex;flex-direction:column;gap:10px}
.product h2{margin:0;font-size:21px}
.product .meta{color:var(--muted);font-size:14px;margin:0}
.product .price-line{font-size:15px;color:var(--muted);margin:4px 0 0}
.product .price-line b{font-size:30px;color:var(--ink);margin-right:6px}
.product .actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:auto;padding-top:8px}
.btn.small{padding:10px 16px;border-radius:10px;font-size:15px}
.btn[disabled],.btn.disabled{opacity:.45;pointer-events:none}
button.btn{border:0;cursor:pointer;font:inherit;font-weight:600}
.form{display:grid;gap:18px;max-width:620px}
.field{display:grid;gap:6px}
.field label{font-weight:600;font-size:15px}
.field .hint{font-size:13px;color:var(--muted)}
.field input[type=text],.field input[type=tel],.field input[type=email],.field textarea,.field select{width:100%;padding:12px 14px;border:1px solid #cbd5e1;border-radius:10px;font:inherit;background:#fff;color:var(--ink)}
.field input:focus,.field textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.req{color:#b91c1c;margin-left:2px}
.inline{display:flex;gap:10px}
.inline input{flex:1}
.choices{display:grid;gap:10px}
.choice{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;padding:14px;cursor:pointer;background:#fff}
.choice input{margin-top:5px}
.choice.selected{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.choice.off{opacity:.5;cursor:not-allowed}
.choice small{display:block;color:var(--muted)}
.check{display:flex;gap:10px;align-items:flex-start;font-size:15px}
.check input{margin-top:5px}
.summary{border:1px solid var(--line);border-radius:14px;padding:18px;background:var(--soft);display:grid;gap:8px}
.summary .row{display:flex;justify-content:space-between;gap:12px}
.summary .total{font-size:20px;font-weight:700;border-top:1px dashed #cbd5e1;padding-top:10px}
.summary .del{text-decoration:line-through;color:var(--muted)}
.alert{border-radius:12px;padding:14px 16px;font-size:15px;border:1px solid}
.alert.info{background:#ecfeff;border-color:#a5f3fc;color:#155e75}
.alert.warn{background:#fffbeb;border-color:#fde68a;color:#92400e}
.alert.err{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.alert.ok{background:#f0fdf4;border-color:#bbf7d0;color:#166534}
.alert p{margin:0}.alert p+p{margin-top:6px}
.pay-methods{display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:620px){.pay-methods{grid-template-columns:repeat(2,1fr)}}
.pay-btn{display:flex;align-items:center;gap:12px;padding:16px;border:1px solid var(--line);border-radius:14px;background:#fff;cursor:pointer;font:inherit;font-size:16px;font-weight:600;color:var(--ink);text-align:left}
.pay-btn:hover{border-color:var(--accent)}
.pay-btn .dot{width:28px;height:28px;border-radius:8px;flex:none}
.pay-btn .wx{background:#07c160}.pay-btn .ali{background:#1677ff}
.pay-btn small{display:block;font-weight:400;color:var(--muted);font-size:13px}
.qr-box{display:flex;flex-direction:column;align-items:center;gap:10px;border:1px solid var(--line);border-radius:16px;padding:22px;background:#fff;max-width:340px}
.qr-box img,.qr-box canvas{width:220px;height:220px;image-rendering:pixelated}
.code-box{font:600 22px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.06em;background:#fff;border:1px dashed var(--accent);border-radius:12px;padding:14px 16px;word-break:break-all}
.muted{color:var(--muted)}
.hidden{display:none!important}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:15px}
.kv dt{color:var(--muted)}.kv dd{margin:0}
.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:13px;border:1px solid var(--line);background:#fff}
.badge.ok{background:#f0fdf4;border-color:#bbf7d0;color:#166534}
.badge.wait{background:#fffbeb;border-color:#fde68a;color:#92400e}
.badge.off{background:#f1f5f9;color:#475569}
.badge.bad{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.admin-table{font-size:13px}
.admin-table td,.admin-table th{padding:8px 6px;white-space:nowrap}
.admin-table tr:hover td{background:var(--soft);cursor:pointer}
.scroll-x{overflow-x:auto}