/* ============================================================
   hhlsq.com — help.css 帮助中心页专属样式
   布局指纹：H5 侧栏布局 Hero（藏蓝窄栏+白底主栏+悬浮压缝小图）｜B3 步骤时间轴｜B2 卡片墙｜手风琴｜B11 对比表｜B1 统计带｜B14 表单｜B15 CTA
   签名元素：S1 旋转编号圆环（数字外绕 dashed 圆环，hover 旋转）
   ============================================================ */

/* ---------- 1. Hero H5 侧栏布局 ---------- */
.help-hero{ background:var(--gray-100); padding:clamp(40px,5vw,64px) 0 clamp(48px,6vw,80px); }
.help-hero__inner{ display:grid; grid-template-columns:250px 1fr; align-items:stretch; position:relative; }

/* 左窄栏：藏蓝深底 */
.help-hero__side{
  background:linear-gradient(160deg,var(--navy-900),var(--navy-800));
  border-radius:var(--radius-lg); padding:34px 26px;
  display:flex; flex-direction:column; justify-content:space-between;
  box-shadow:var(--shadow-md);
}
.help-sidenav__item{ display:flex; align-items:baseline; gap:12px; padding:14px 0; border-bottom:1px dashed rgba(232,238,245,.18); }
.help-sidenav__num{ font-size:22px; font-weight:700; color:var(--gold); line-height:1; }
.help-sidenav__txt{ font-size:15px; color:rgba(232,238,245,.88); letter-spacing:.06em; }
.help-hero__sidecontact{ margin-top:24px; font-size:13px; line-height:1.9; color:rgba(232,238,245,.66); }
.help-hero__sidecontact{ font-weight:600; color:var(--gold); font-size:15px; }

/* 右栏：白底内容 */
.help-hero__main{
  background:#fff; border-radius:var(--radius-lg); margin-left:-28px;
  padding:clamp(36px,4.5vw,60px) clamp(30px,4vw,60px) clamp(30px,4vw,48px);
  box-shadow:var(--shadow-sm); position:relative; z-index:1;
}
.help-hero__title{ font-size:clamp(28px,3.8vw,44px); line-height:1.28; margin:14px 0 16px; }
.help-hero__title em{ font-style:normal; color:var(--gold); }
.help-hero__lead{ color:var(--gray-600); font-size:16px; max-width:560px; margin-bottom:26px; }
.help-hero__actions{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:32px; }
.help-hero__media{ position:relative; }
.help-hero__img{ width:100%; aspect-ratio:16/9; object-fit:cover; border-radius:var(--radius-md); box-shadow:var(--shadow-md); }
.help-hero__img-sub{
  width:38%; aspect-ratio:16/10; position:absolute; right:-14px; bottom:-30px;
  border:5px solid #fff; border-radius:var(--radius-md); box-shadow:var(--shadow-lg);
}

/* ---------- 2. B3 步骤时间轴 + S1 旋转编号圆环 ---------- */
.help-flow__steps{ display:grid; grid-template-columns:repeat(5,1fr); gap:20px; }
.help-step{ background:#fff; border:1px solid var(--gray-200); border-radius:var(--radius-lg); padding:28px 22px; box-shadow:var(--shadow-sm); }
.help-step__ring{
  display:inline-flex; align-items:center; justify-content:center;
  width:74px; height:74px; border-radius:50%;
  border:1.5px dashed var(--gold); margin-bottom:16px;
  transition:transform .6s ease;
}
.help-step:hover .help-step__ring{ transform:rotate(360deg); }
.help-step__ring b{ font-size:22px; font-weight:700; color:var(--navy-700); }
.help-step h3{ font-size:17px; margin-bottom:10px; }
.help-step p{ font-size:13.5px; color:var(--gray-600); margin:0; line-height:1.75; }

/* ---------- 3. B2 分主题卡片墙 ---------- */
.help-topic__grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.help-topic__card{
  background:#fff; border:1px solid var(--gray-200); border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm); padding:28px 26px; transition:all .3s ease;
}
.help-topic__card:nth-child(even){ transform:translateY(16px); }
.help-topic__card:hover{ transform:translateY(-6px); box-shadow:var(--shadow-md); }
.help-topic__card:nth-child(even):hover{ transform:translateY(10px); }
.help-topic__card svg{ width:30px; height:30px; color:var(--navy-600); margin-bottom:14px; }
.help-topic__card:hover svg{ color:var(--gold); }
.help-topic__card h3{ font-size:17px; margin-bottom:10px; }
.help-topic__card p{ font-size:14px; color:var(--gray-600); margin:0; line-height:1.75; }

/* ---------- 4. 手风琴 ---------- */
.help-acc{ max-width:860px; margin:0 auto; }
.help-acc__item{
  background:#fff; border:1px solid var(--gray-200); border-radius:var(--radius-md);
  margin-bottom:12px; box-shadow:var(--shadow-sm); overflow:hidden;
}
.help-acc__item[open]{ border-color:var(--navy-500); }
.help-acc__item summary{
  display:flex; align-items:center; gap:12px; padding:16px 20px; cursor:pointer;
  list-style:none; font-weight:600; font-size:15.5px; color:var(--navy-900);
}
.help-acc__item summary::-webkit-details-marker{ display:none; }
.help-acc__item summary::after{
  content:"+"; margin-left:auto; font-size:20px; font-weight:300; color:var(--gold);
  transition:transform .25s ease;
}
.help-acc__item[open] summary::after{ transform:rotate(45deg); }
.help-acc__a{ padding:0 20px 18px 32px; color:var(--gray-600); font-size:14.5px; line-height:1.85; }

/* ---------- 5. B11 对比表 ---------- */
.help-table__wrap{ overflow-x:auto; border-radius:var(--radius-md); box-shadow:var(--shadow-sm); }
.help-table__tbl{ width:100%; border-collapse:collapse; background:#fff; min-width:620px; }
.help-table__tbl th{ background:var(--navy-800); color:#fff; padding:14px 18px; font-size:14.5px; text-align:left; }
.help-table__tbl td{ padding:13px 18px; font-size:14.5px; color:var(--gray-700); border-bottom:1px solid var(--gray-200); }
.help-table__tbl tbody tr:nth-child(odd){ background:var(--gray-50); }
.help-table__tbl tbody tr:hover{ background:var(--blue-soft); }
.help-table__tbl td:first-child{ font-weight:600; color:var(--navy-900); }

/* ---------- 6. B1 数据带 ---------- */
.help-stats{ background:linear-gradient(135deg,var(--navy-900),var(--navy-800)); }
.help-stats__grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; text-align:center; }
.help-stat{ position:relative; padding:8px 0; }
.help-stat + .help-stat::before{
  content:""; position:absolute; left:0; top:50%; transform:translateY(-50%);
  width:1px; height:46px; background:rgba(232,238,245,.16);
}
.help-stat .stat-num{ color:#fff; }
.help-stat .stat-note{ color:rgba(232,238,245,.66); }

/* ---------- 7. B14 表单 ---------- */
.help-form__split{ display:grid; grid-template-columns:1fr 1.05fr; gap:48px; align-items:center; }
.help-form__text{ color:var(--gray-600); font-size:15px; margin:14px 0 20px; }
.help-form__text a{ font-weight:600; color:var(--navy-700); }
.help-form__points li{
  display:flex; align-items:baseline; gap:10px;
  padding:8px 0; font-size:14.5px; color:var(--gray-700);
  border-bottom:1px dashed var(--gray-300);
}
.help-form__points li::before{ content:""; width:8px; height:8px; border-radius:50%; background:var(--gold); flex-shrink:0; }
.help-form__points li:last-child{ border-bottom:none; }
.help-form__points a{ font-weight:600; color:var(--navy-600); }

/* ---------- 8. B15 CTA ---------- */
.help-cta{ padding-bottom:clamp(70px,8vw,110px); }
.help-cta__banner{
  background:linear-gradient(135deg,var(--navy-800),var(--navy-700) 55%,var(--navy-600));
  border-radius:28px; padding:clamp(44px,5vw,72px) clamp(24px,4vw,56px);
  text-align:center; position:relative; overflow:hidden; box-shadow:var(--shadow-lg);
}
.help-cta__banner::before{
  content:""; position:absolute; right:-90px; top:-90px; width:280px; height:280px;
  border-radius:50%; border:1.5px dashed var(--gold); opacity:.5;
}
.help-cta__title{ color:#fff; font-size:clamp(22px,3vw,32px); margin-bottom:12px; position:relative; }
.help-cta__sub{ color:rgba(232,238,245,.78); font-size:15px; margin-bottom:28px; position:relative; }
.help-cta__actions{ display:flex; gap:16px; justify-content:center; flex-wrap:wrap; position:relative; }
.help-cta__ghost{ border-color:rgba(255,255,255,.5); color:#fff; }
.help-cta__ghost:hover{ background:#fff; color:var(--navy-700); }

/* ---------- 响应式 ---------- */
@media (max-width: 992px){
  .help-hero__inner{ grid-template-columns:1fr; }
  .help-hero__side{ flex-direction:row; align-items:center; flex-wrap:wrap; gap:16px; margin-bottom:-34px; position:relative; z-index:2; }
  .help-sidenav__item{ border-bottom:none; padding:6px 0; }
  .help-hero__sidecontact{ margin-top:0; }
  .help-hero__main{ margin-left:0; padding-top:64px; }
  .help-flow__steps{ grid-template-columns:repeat(2,1fr); }
  .help-topic__grid{ grid-template-columns:repeat(2,1fr); }
  .help-topic__card:nth-child(even){ transform:none; }
  .help-topic__card:nth-child(even):hover{ transform:translateY(-6px); }
  .help-stats__grid{ grid-template-columns:repeat(2,1fr); gap:28px 20px; }
  .help-stat:nth-child(3)::before{ display:none; }
  .help-form__split{ grid-template-columns:1fr; }
}
@media (max-width: 640px){
  .help-sidenav{ width:100%; }
  .help-hero__img-sub{ position:static; width:60%; margin-top:-20px; margin-left:auto; }
  .help-flow__steps{ grid-template-columns:1fr; }
  .help-topic__grid{ grid-template-columns:1fr; }
  .help-stats__grid{ grid-template-columns:1fr 1fr; gap:18px; }
  .help-cta__actions .btn{ width:100%; }
}