/* 51xialunwen Help & Trust pages — scoped presentation (2026-08-17 current UI).
 * Appends to assets/ui-v1/site.css (current production base). All selectors are
 * scoped under .help-page / .faq-* / .contact-* / .legal-* . No bare element rules.
 */
.help-page{max-width:min(calc(100% - 40px),var(--max));margin:0 auto;padding:0 0 8px}
.help-page .help-shell{max-width:880px;margin:0 auto;padding:34px 0 8px}
.help-page .help-shell-wide{max-width:980px;margin:0 auto;padding:34px 0 8px}

/* ---- shared section card ---- */
.help-section{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:26px 28px;margin-bottom:18px}
.help-section-head{margin-bottom:16px}
.help-section-head h2{margin:0;font-size:21px;letter-spacing:-.3px}
.help-section-head p{margin:6px 0 0;color:var(--soft);font-size:13px}

/* ---- FAQ accordion ---- */
.faq-group{display:grid;gap:10px}
.faq-item{border:1px solid var(--line);border-radius:var(--r-md);background:#fff;overflow:hidden}
.faq-item[open]{border-color:var(--line2);box-shadow:0 6px 18px rgba(20,42,56,.05)}
.faq-item summary{cursor:pointer;list-style:none;padding:15px 18px;font-weight:650;font-size:15px;display:flex;justify-content:space-between;align-items:center;gap:14px;user-select:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";color:var(--accent);font-size:20px;font-weight:700;line-height:1;flex:0 0 auto;transition:transform .15s ease}
.faq-item[open] summary:after{content:"\2013"}
.faq-item .faq-answer{padding:0 18px 16px;color:#41505e;font-size:14px;line-height:1.75}
.faq-item .faq-answer p{margin:0 0 8px}
.faq-item .faq-answer p:last-child{margin-bottom:0}
.faq-item .faq-answer a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line2)}
.faq-item .faq-answer ul{margin:6px 0 0;padding-left:20px}
.faq-item .faq-answer li{margin:3px 0}

/* ---- FAQ link list (更多教程 / 旧链接兼容) ---- */
.faq-link-list{display:grid;gap:8px}
.faq-link-item{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;min-height:58px;padding:10px 16px;border:1px solid var(--line);border-radius:var(--r-md);background:#fff;transition:border-color .15s ease,box-shadow .15s ease}
.faq-link-item:hover{border-color:var(--line2);box-shadow:0 6px 16px rgba(20,42,56,.06)}
.faq-link-item small{color:var(--accent);font-size:11px;font-weight:700;white-space:nowrap}
.faq-link-item span{color:var(--text);font-size:14px;font-weight:600}
.faq-link-item em{color:#8a98a5;font-size:12px;font-style:normal;white-space:nowrap}

/* ---- contact page ---- */
.contact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.contact-card{border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;padding:22px;text-align:center}
.contact-card h3{margin:0 0 8px;font-size:17px}
.contact-card p{margin:0 0 14px;color:var(--soft);font-size:13px}
.contact-card img{max-width:200px;height:auto;border-radius:10px;border:1px solid var(--line);margin:0 auto}
.contact-value{font-size:20px;font-weight:750;color:var(--brand);letter-spacing:.4px;margin-bottom:12px}
.contact-topic{display:grid;gap:10px}
.contact-topic-item{border:1px solid var(--line);border-radius:var(--r-md);background:#fff;padding:14px 16px}
.contact-topic-item .topic-tag{display:inline-flex;align-items:center;min-height:24px;padding:0 9px;border-radius:999px;background:var(--accent-soft);color:var(--brand);font-size:12px;font-weight:700}
.contact-topic-item p{margin:8px 0 0;color:#41505e;font-size:13px}
.contact-note{border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 var(--r-md) var(--r-md) 0;background:var(--accent-soft);padding:16px 18px;margin-top:18px}
.contact-note h3{margin:0 0 6px;font-size:14px;color:var(--brand2)}
.contact-note p{margin:0;color:#41505e;font-size:13px;line-height:1.7}
.contact-prep-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.contact-prep-list li{display:flex;gap:10px;align-items:flex-start;color:#41505e;font-size:14px;line-height:1.7}
.contact-prep-list li:before{content:"✓";color:var(--accent);font-weight:800;flex:0 0 auto}

/* ---- legal (copyright) page ---- */
.legal-section{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:24px 28px;margin-bottom:16px}
.legal-section h2{margin:0 0 10px;font-size:18px;letter-spacing:-.2px}
.legal-section p{margin:0 0 10px;color:#3c4b58;font-size:14px;line-height:1.8}
.legal-section p:last-child{margin-bottom:0}
.legal-section ul{margin:6px 0 10px;padding-left:20px;color:#3c4b58;font-size:14px;line-height:1.8}
.legal-section li{margin:3px 0}
.legal-section a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line2)}
.legal-update{border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:0 var(--r-md) var(--r-md) 0;background:var(--surface-soft);padding:14px 18px;margin-top:18px;color:#41505e;font-size:13px}
.legal-update a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}

/* ---- faq-754 tutorial steps ---- */
.faq-754-steps{list-style:none;margin:0;padding:0;display:grid;gap:20px}
.faq-754-steps li{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:22px 24px}
.faq-754-steps .step-title{display:flex;align-items:center;gap:10px;margin:0 0 10px;font-size:16px;font-weight:700}
.faq-754-steps .step-title .step-no{width:26px;height:26px;flex:0 0 auto;border-radius:999px;background:var(--brand);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}
.faq-754-steps p{margin:0 0 10px;color:#3c4b58;font-size:14px;line-height:1.8}
.faq-754-steps p:last-child{margin-bottom:0}
.faq-754-steps img{max-width:100%;height:auto;border-radius:10px;border:1px solid var(--line);display:block;margin:10px 0 0}
.faq-754-steps .step-note{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface-soft);padding:12px 14px;margin-top:10px;color:#41505e;font-size:13px}
.faq-754-steps .step-note a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}

/* ---- misc ---- */
.page-helplinks{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}

@media(max-width:820px){
  .help-page .help-shell,.help-page .help-shell-wide{padding-top:24px}
  .help-section{padding:22px 20px}
  .legal-section{padding:20px 20px}
  .contact-grid{grid-template-columns:1fr}
  .faq-link-item{grid-template-columns:1fr;gap:4px}
  .faq-link-item em{display:none}
}
@media(max-width:520px){
  .help-section-head h2{font-size:19px}
  .contact-card{padding:18px}
  .contact-card img{max-width:180px}
  .faq-item summary{font-size:14px;padding:13px 14px}
  .faq-754-steps li{padding:18px 16px}
}