.about-layout{display:grid;grid-template-columns:158px 1fr;min-height:500px}
.about-nav{border-right:1px solid var(--border);padding:12px 0;background:rgba(248,250,252,.65)}
.about-nav-item{display:flex;align-items:center;gap:9px;padding:11px 16px;font-size:13px;color:var(--text2);border-left:3px solid transparent;position:relative;overflow:hidden;transition:color .22s ease,background .22s ease,border-color .22s ease,padding-left .22s ease}
.about-nav-item::before{content:'';position:absolute;top:50%;left:-20px;width:0;height:0;background:rgba(37,99,235,.07);border-radius:50%;transform:translate(-50%,-50%);transition:width .4s ease,height .4s ease,opacity .4s ease;opacity:0}
.about-nav-item:hover::before{width:200px;height:200px;opacity:1}
.about-nav-item:hover{color:var(--acc);background:rgba(239,246,255,.6);border-left-color:var(--acc);padding-left:22px}
.about-nav-item i{font-size:12px;color:var(--muted);width:14px;text-align:center;flex-shrink:0;transition:transform .35s cubic-bezier(.34,1.56,.64,1),color .22s ease;position:relative;z-index:1}
.about-nav-item:hover i{transform:rotate(-12deg) scale(1.25);color:var(--acc)}
.about-nav-item.active{background:var(--acc-l);color:var(--acc);border-left-color:var(--acc);font-weight:600}
.about-nav-item.active i{color:var(--acc)}
.about-body{padding:26px 30px;display:flex;flex-direction:column;gap:30px}
.bq-banner{display:flex;align-items:center;gap:18px;padding:20px 24px;background:linear-gradient(135deg,#1d4ed8 0%,#2563eb 45%,#0ea5e9 100%);border-radius:12px;box-shadow:0 6px 24px rgba(37,99,235,.3);position:relative;overflow:hidden;transition:transform .3s ease,box-shadow .3s ease}
.bq-banner::before{content:'';position:absolute;top:-30px;right:-30px;width:120px;height:120px;border-radius:50%;background:rgba(255,255,255,.08)}
.bq-banner::after{content:'';position:absolute;bottom:-20px;right:60px;width:80px;height:80px;border-radius:50%;background:rgba(255,255,255,.05)}
.bq-banner:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(37,99,235,.4)}
.bq-banner-icon{width:52px;height:52px;border-radius:12px;background:rgba(255,255,255,.18);display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff;flex-shrink:0;transition:transform .35s cubic-bezier(.34,1.56,.64,1);position:relative;z-index:1}
.bq-banner:hover .bq-banner-icon{transform:rotate(-8deg) scale(1.1)}
.bq-banner-text{position:relative;z-index:1}
.bq-banner-title{font-size:16px;font-weight:700;color:#fff;margin-bottom:5px}
.bq-banner-sub{font-size:12.5px;color:rgba(255,255,255,.78);line-height:1.6}
.about-section{display:flex;flex-direction:column;gap:16px}
.about-section-title{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:700;color:var(--text);padding-bottom:11px;border-bottom:1px solid var(--border);position:relative}
.about-section-title::after{content:'';position:absolute;bottom:-1px;left:0;width:44px;height:2px;background:linear-gradient(90deg,var(--acc),var(--cyan));border-radius:2px;transition:width .35s ease}
.about-section:hover .about-section-title::after{width:100px}
.about-section-title i{color:var(--acc);font-size:14px;transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.about-section:hover .about-section-title i{transform:rotate(-10deg) scale(1.2)}
.bq-card-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.bq-card{display:flex;flex-direction:column;gap:10px;padding:16px;background:rgba(248,250,252,.8);border:1px solid var(--border);border-radius:10px;transition:transform .28s cubic-bezier(.34,1.56,.64,1),box-shadow .28s ease,background .22s ease,border-color .22s ease;position:relative;overflow:hidden}
.bq-card::before{content:'';position:absolute;bottom:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--acc),var(--cyan));transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.bq-card:hover{transform:translateY(-4px);box-shadow:0 8px 28px rgba(37,99,235,.13);background:rgba(239,246,255,.8);border-color:#c3d8ff}
.bq-card:hover::before{transform:scaleX(1)}
.bq-card-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:16px;transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.bq-card:hover .bq-card-icon{transform:rotate(-8deg) scale(1.12)}
.bq-card-title{font-size:13.5px;font-weight:700;color:var(--text);transition:color .22s ease}
.bq-card:hover .bq-card-title{color:var(--acc)}
.bq-card-desc{font-size:12.5px;color:var(--muted);line-height:1.75}
.bq-rule-list{display:flex;flex-direction:column;gap:8px}
.bq-rule-item{display:flex;align-items:flex-start;gap:14px;padding:14px 16px;border-radius:10px;border:1px solid var(--border);position:relative;overflow:hidden;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,padding-left .22s ease}
.bq-rule-item::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;border-radius:0 3px 3px 0;transform:scaleY(0);transform-origin:center;transition:transform .28s cubic-bezier(.34,1.56,.64,1)}
.bq-rule-allow::before{background:linear-gradient(180deg,#10b981,#34d399)}
.bq-rule-deny::before{background:linear-gradient(180deg,#ef4444,#f97316)}
.bq-rule-item:hover{padding-left:22px;transform:translateX(3px);box-shadow:0 4px 16px rgba(0,0,0,.07)}
.bq-rule-item:hover::before{transform:scaleY(1)}
.bq-rule-allow{background:rgba(236,253,245,.5);border-color:#a7f3d0}
.bq-rule-deny{background:rgba(254,242,242,.5);border-color:#fca5a5}
.bq-rule-allow:hover{background:rgba(209,250,229,.7);border-color:#6ee7b7}
.bq-rule-deny:hover{background:rgba(254,226,226,.7);border-color:#f87171}
.bq-rule-badge{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0;margin-top:1px;transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.bq-rule-item:hover .bq-rule-badge{transform:scale(1.2) rotate(-10deg)}
.bq-badge-allow{background:#10b981;color:#fff}
.bq-badge-deny{background:#ef4444;color:#fff}
.bq-rule-content{flex:1}
.bq-rule-title{font-size:13.5px;font-weight:700;margin-bottom:5px;transition:color .22s ease}
.bq-rule-allow .bq-rule-title{color:#065f46}
.bq-rule-deny .bq-rule-title{color:#991b1b}
.bq-rule-desc{font-size:13px;line-height:1.75;color:var(--muted);transition:color .22s ease}
.bq-rule-item:hover .bq-rule-desc{color:var(--text2)}
.bq-steps{display:flex;flex-direction:column;gap:0}
.bq-step{display:flex;align-items:flex-start;gap:16px;padding:16px 18px;background:rgba(248,250,252,.7);border:1px solid var(--border);border-radius:10px;position:relative;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,background .22s ease,border-color .22s ease}
.bq-step::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,var(--acc),var(--cyan));border-radius:0 3px 3px 0;transform:scaleY(0);transform-origin:top;transition:transform .3s cubic-bezier(.34,1.56,.64,1)}
.bq-step:hover{transform:translateX(4px);box-shadow:0 4px 18px rgba(37,99,235,.1);background:rgba(239,246,255,.8);border-color:#c3d8ff}
.bq-step:hover::before{transform:scaleY(1)}
.bq-step-num{flex-shrink:0;width:42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--acc),var(--cyan));color:#fff;font-size:15px;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(37,99,235,.28);transition:transform .35s cubic-bezier(.34,1.56,.64,1),box-shadow .3s ease}
.bq-step:hover .bq-step-num{transform:scale(1.1) rotate(-5deg);box-shadow:0 6px 18px rgba(37,99,235,.38)}
.bq-step-title{font-size:14px;font-weight:700;color:var(--text);margin-bottom:6px;transition:color .22s ease}
.bq-step:hover .bq-step-title{color:var(--acc)}
.bq-step-desc{font-size:13px;color:var(--muted);line-height:1.75;transition:color .22s ease}
.bq-step:hover .bq-step-desc{color:var(--text2)}
.bq-step-desc strong{color:var(--acc);font-weight:700}
.bq-step-arrow{display:flex;justify-content:flex-start;padding-left:29px;color:var(--muted2);font-size:11px;line-height:1;margin:3px 0;animation:stepArrowBounce 1.6s ease-in-out infinite}
@keyframes stepArrowBounce{0%,100%{transform:translateY(0);opacity:.5}50%{transform:translateY(3px);opacity:1}}
.about-law{position:relative;background:linear-gradient(120deg,#f0f7ff,#f0fdfe);border:1px solid #bae6fd;border-left:4px solid var(--cyan);border-radius:10px;padding:18px 20px 18px 50px;font-size:13.5px;color:var(--text2);line-height:1.9;transition:transform .25s ease,box-shadow .25s ease}
.about-law:hover{transform:translateX(3px);box-shadow:0 4px 18px rgba(14,165,233,.12)}
.about-quote-icon{position:absolute;left:16px;top:16px;font-size:20px;color:var(--cyan);opacity:.55;transition:transform .35s cubic-bezier(.34,1.56,.64,1),opacity .25s ease}
.about-law:hover .about-quote-icon{transform:scale(1.2) rotate(-8deg);opacity:.8}
.about-law p{margin:0}
.about-link{color:var(--acc);text-decoration:underline;text-underline-offset:3px;transition:color .22s ease,letter-spacing .22s ease}
.about-link:hover{color:var(--acc-d);letter-spacing:.3px}
.about-footer-sign{display:flex;align-items:center;justify-content:flex-end;gap:8px;padding-top:18px;border-top:1px dashed var(--border);font-size:12.5px;color:var(--muted);font-style:italic;transition:color .22s ease}
.about-footer-sign:hover{color:var(--text2)}
.about-footer-sign i{color:var(--acc);font-size:14px;transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.about-footer-sign:hover i{transform:rotate(-15deg) scale(1.2)}
@media(max-width:900px){.bq-card-list{grid-template-columns:1fr 1fr}}
@media(max-width:768px){
  .about-layout{grid-template-columns:1fr}
  .about-nav{border-right:none;border-bottom:1px solid var(--border);display:flex;flex-wrap:wrap;padding:8px;gap:4px}
  .about-nav-item{border-left:none;border-radius:6px;border:1px solid var(--border);padding:6px 12px !important;font-size:12.5px}
  .about-nav-item:hover{padding-left:12px !important}
  .about-nav-item.active{border-color:var(--acc)}
  .about-body{padding:16px;gap:22px}
  .bq-card-list{grid-template-columns:1fr}
}
/* ---- 用户协议专属样式（复用隐私政策折叠面板） ---- */
.pp-chapter {
  background: rgba(248,250,252,.7);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: box-shadow .25s ease, border-color .22s ease;
}
.pp-chapter:hover {
  border-color: #c3d8ff;
  box-shadow: 0 4px 16px rgba(37,99,235,.08);
}
.pp-chapter-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  transition: background .22s ease;
}
.pp-chapter-head:hover { background: rgba(239,246,255,.7); }
.pp-chapter-badge {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; flex-shrink: 0;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1), box-shadow .25s ease;
}
.pp-chapter-head:hover .pp-chapter-badge {
  transform: rotate(-8deg) scale(1.12);
  box-shadow: 0 4px 14px rgba(37,99,235,.2);
}
.pp-chapter-label { flex: 1; }
.pp-chapter-num {
  font-size: 11.5px; color: var(--muted); font-weight: 600;
  letter-spacing: .5px; margin-bottom: 2px;
  transition: color .22s ease;
}
.pp-chapter-head:hover .pp-chapter-num { color: var(--acc); }
.pp-chapter-title {
  font-size: 14px; font-weight: 700; color: var(--text);
  transition: color .22s ease;
}
.pp-chapter-head:hover .pp-chapter-title { color: var(--acc); }
.pp-chapter-arr {
  font-size: 12px; color: var(--muted); flex-shrink: 0;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1), color .22s ease;
}
.pp-chapter.open .pp-chapter-arr { transform: rotate(180deg); color: var(--acc); }
.pp-chapter-body {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height .38s cubic-bezier(.4,0,.2,1), padding .38s ease;
}
.pp-chapter.open .pp-chapter-body { max-height: 6000px; padding: 0 20px 20px; }

/* 段落文本 */
.pp-text {
  font-size: 13.5px; color: var(--text2); line-height: 1.9;
  margin: 0 0 14px;
}
.pp-text:last-child { margin-bottom: 0; }
.pp-text strong { color: var(--text); font-weight: 700; }

/* 有序列表 */
.pp-list {
  list-style: none; margin: 0 0 14px; padding: 0;
  display: flex; flex-direction: column; gap: 6px;
}
.pp-list li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 13.5px; color: var(--text2); line-height: 1.8;
  padding: 8px 12px;
  background: rgba(255,255,255,.7);
  border: 1px solid var(--border); border-radius: 8px;
  transition: background .2s ease, border-color .2s ease, transform .22s ease, padding-left .2s ease;
  position: relative;
}
.pp-list li::before {
  content: ''; position: absolute;
  left: 0; top: 0; bottom: 0; width: 3px;
  border-radius: 0 2px 2px 0;
  background: linear-gradient(180deg, var(--acc), var(--cyan));
  transform: scaleY(0); transform-origin: center;
  transition: transform .25s cubic-bezier(.34,1.56,.64,1);
}
.pp-list li:hover { background: rgba(239,246,255,.8); border-color: #c3d8ff; padding-left: 16px; }
.pp-list li:hover::before { transform: scaleY(1); }
.pp-list-num {
  width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, var(--acc), var(--cyan));
  color: #fff; font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 1px;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}
.pp-list li:hover .pp-list-num { transform: scale(1.15) rotate(-8deg); }

/* 子条款列表（细线样式） */
.pp-sub-list {
  list-style: none; margin: 8px 0 0; padding: 0;
  display: flex; flex-direction: column; gap: 4px;
}
.pp-sub-list li {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 13px; color: var(--muted); line-height: 1.75;
  padding: 7px 12px 7px 10px;
  background: rgba(248,250,252,.6);
  border: 1px solid var(--border); border-radius: 7px;
  transition: background .2s ease, border-color .2s ease, color .2s ease, padding-left .2s ease;
}
.pp-sub-list li:hover { background: rgba(239,246,255,.7); border-color: #c3d8ff; color: var(--text2); padding-left: 14px; }
.pp-sub-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--acc); flex-shrink: 0; margin-top: 7px;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}
.pp-sub-list li:hover .pp-sub-dot { transform: scale(1.5); }

/* 目录卡片 */
.pp-toc {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px;
}
.pp-toc-item {
  display: flex; flex-direction: column; align-items: center;
  gap: 6px; padding: 12px 8px 10px;
  background: rgba(248,250,252,.85); border: 1px solid var(--border);
  border-radius: 10px; text-decoration: none;
  color: var(--text2); font-size: 12px; font-weight: 500;
  text-align: center; line-height: 1.4;
  position: relative; overflow: hidden;
  transition: color .22s ease, background .22s ease, border-color .22s ease,
              transform .25s cubic-bezier(.34,1.56,.64,1), box-shadow .22s ease;
}
.pp-toc-item::before {
  content: ''; position: absolute;
  bottom: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--acc), var(--cyan));
  transform: scaleX(0); transform-origin: left;
  transition: transform .28s ease;
}
.pp-toc-item:hover {
  color: var(--acc); background: rgba(239,246,255,.9);
  border-color: #c3d8ff; transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(37,99,235,.12);
}
.pp-toc-item:hover::before { transform: scaleX(1); }
.pp-toc-num {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--acc), var(--cyan));
  color: #fff; font-size: 12px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 3px 10px rgba(37,99,235,.25);
  transition: transform .35s cubic-bezier(.34,1.56,.64,1), box-shadow .25s ease;
}
.pp-toc-item:hover .pp-toc-num { transform: scale(1.18) rotate(-8deg); box-shadow: 0 5px 16px rgba(37,99,235,.38); }

/* 引用块 */
.pp-quote {
  position: relative;
  background: linear-gradient(120deg, #f0f7ff, #f0fdfe);
  border: 1px solid #bae6fd; border-left: 4px solid var(--cyan);
  border-radius: 10px; padding: 16px 18px 16px 48px;
  font-size: 13.5px; color: var(--text2); line-height: 1.85;
  margin-bottom: 14px;
  transition: transform .25s ease, box-shadow .25s ease;
}
.pp-quote:hover { transform: translateX(3px); box-shadow: 0 4px 16px rgba(14,165,233,.1); }
.pp-quote-icon {
  position: absolute; left: 14px; top: 14px;
  font-size: 18px; color: var(--cyan); opacity: .5;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1), opacity .25s ease;
}
.pp-quote:hover .pp-quote-icon { transform: scale(1.2) rotate(-8deg); opacity: .8; }
.pp-quote p { margin: 0; }

/* 章节分隔线 */
.pp-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 4px 0;
}

/* 警告块（账号注销警示） */
.pp-warning {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px 16px;
  background: rgba(254,242,242,.6); border: 1px solid #fca5a5;
  border-left: 4px solid #ef4444; border-radius: 10px;
  margin-bottom: 14px;
  transition: transform .22s ease, box-shadow .22s ease;
}
.pp-warning:hover { transform: translateX(3px); box-shadow: 0 4px 14px rgba(239,68,68,.1); }
.pp-warning-icon { font-size: 16px; color: #ef4444; flex-shrink: 0; margin-top: 1px; transition: transform .35s cubic-bezier(.34,1.56,.64,1); }
.pp-warning:hover .pp-warning-icon { transform: scale(1.2) rotate(-8deg); }
.pp-warning-text { font-size: 13.5px; color: #991b1b; line-height: 1.8; }
.pp-warning-text strong { color: #7f1d1d; }

@media(max-width:640px){ .pp-toc { grid-template-columns: repeat(3,1fr); } }
@media(max-width:420px){ .pp-toc { grid-template-columns: repeat(2,1fr); } }


/* ---- 隐私政策专属样式 ---- */

/* 章节目录卡 */
.pp-toc {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.pp-toc-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 8px 10px;
  background: rgba(248,250,252,.85);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text2);
  font-size: 12px;
  font-weight: 500;
  text-align: center;
  line-height: 1.4;
  position: relative;
  overflow: hidden;
  transition: color .22s ease, background .22s ease, border-color .22s ease,
              transform .25s cubic-bezier(.34,1.56,.64,1), box-shadow .22s ease;
}
.pp-toc-item::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--acc), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}
.pp-toc-item:hover {
  color: var(--acc);
  background: rgba(239,246,255,.9);
  border-color: #c3d8ff;
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(37,99,235,.12);
}
.pp-toc-item:hover::before { transform: scaleX(1); }
.pp-toc-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--acc), var(--cyan));
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 3px 10px rgba(37,99,235,.25);
  transition: transform .35s cubic-bezier(.34,1.56,.64,1), box-shadow .25s ease;
}
.pp-toc-item:hover .pp-toc-num {
  transform: scale(1.18) rotate(-8deg);
  box-shadow: 0 5px 16px rgba(37,99,235,.38);
}

/* 章节折叠面板 */
.pp-chapter {
  background: rgba(248,250,252,.7);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: box-shadow .25s ease, border-color .22s ease;
}
.pp-chapter:hover {
  border-color: #c3d8ff;
  box-shadow: 0 4px 16px rgba(37,99,235,.08);
}
.pp-chapter-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  transition: background .22s ease;
  position: relative;
}
.pp-chapter-head:hover { background: rgba(239,246,255,.7); }
.pp-chapter-badge {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1), box-shadow .25s ease;
}
.pp-chapter-head:hover .pp-chapter-badge {
  transform: rotate(-8deg) scale(1.12);
  box-shadow: 0 4px 14px rgba(37,99,235,.2);
}
.pp-chapter-label {
  flex: 1;
}
.pp-chapter-num {
  font-size: 11.5px;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 2px;
  transition: color .22s ease;
}
.pp-chapter-head:hover .pp-chapter-num { color: var(--acc); }
.pp-chapter-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  transition: color .22s ease;
}
.pp-chapter-head:hover .pp-chapter-title { color: var(--acc); }
.pp-chapter-arr {
  font-size: 12px;
  color: var(--muted);
  flex-shrink: 0;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1), color .22s ease;
}
.pp-chapter.open .pp-chapter-arr { transform: rotate(180deg); color: var(--acc); }
.pp-chapter-body {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height .38s cubic-bezier(.4,0,.2,1), padding .38s ease;
}
.pp-chapter.open .pp-chapter-body {
  max-height: 4000px;
  padding: 0 20px 20px;
}

/* 段落文本 */
.pp-text {
  font-size: 13.5px;
  color: var(--text2);
  line-height: 1.9;
  margin: 0 0 14px;
}
.pp-text:last-child { margin-bottom: 0; }
.pp-text strong { color: var(--text); font-weight: 700; }

/* 有序列表 */
.pp-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.pp-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text2);
  line-height: 1.8;
  padding: 8px 12px;
  background: rgba(255,255,255,.7);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: background .2s ease, border-color .2s ease, transform .22s ease, padding-left .2s ease;
  position: relative;
}
.pp-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  border-radius: 0 2px 2px 0;
  background: linear-gradient(180deg, var(--acc), var(--cyan));
  transform: scaleY(0);
  transform-origin: center;
  transition: transform .25s cubic-bezier(.34,1.56,.64,1);
}
.pp-list li:hover {
  background: rgba(239,246,255,.8);
  border-color: #c3d8ff;
  padding-left: 16px;
}
.pp-list li:hover::before { transform: scaleY(1); }
.pp-list-num {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--acc), var(--cyan));
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}
.pp-list li:hover .pp-list-num { transform: scale(1.15) rotate(-8deg); }

/* 七原则高亮块 */
.pp-principles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}
.pp-principle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 14px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  text-align: center;
  font-size: 12.5px;
  color: var(--text2);
  line-height: 1.5;
  font-weight: 500;
  transition: transform .28s cubic-bezier(.34,1.56,.64,1), box-shadow .25s ease,
              background .22s ease, border-color .22s ease, color .22s ease;
  position: relative; overflow: hidden;
}
.pp-principle::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}
.pp-principle:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(0,0,0,.1);
  color: var(--text);
}
.pp-principle:hover::after { transform: scaleX(1); }
.pp-principle i {
  font-size: 18px;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1);
}
.pp-principle:hover i { transform: scale(1.25) rotate(-8deg); }
.pp-pr-deny  { background: rgba(254,242,242,.6); border-color: #fca5a5; }
.pp-pr-deny::after { background: linear-gradient(90deg,#ef4444,#f97316); }
.pp-pr-deny i  { color: #ef4444; }
.pp-pr-must  { background: rgba(236,253,245,.6); border-color: #a7f3d0; }
.pp-pr-must::after { background: linear-gradient(90deg,#10b981,#34d399); }
.pp-pr-must i  { color: #10b981; }

/* 信息引用块 */
.pp-quote {
  position: relative;
  background: linear-gradient(120deg, #f0f7ff, #f0fdfe);
  border: 1px solid #bae6fd;
  border-left: 4px solid var(--cyan);
  border-radius: 10px;
  padding: 16px 18px 16px 48px;
  font-size: 13.5px;
  color: var(--text2);
  line-height: 1.85;
  margin-bottom: 14px;
  transition: transform .25s ease, box-shadow .25s ease;
}
.pp-quote:hover { transform: translateX(3px); box-shadow: 0 4px 16px rgba(14,165,233,.1); }
.pp-quote-icon {
  position: absolute;
  left: 14px; top: 14px;
  font-size: 18px;
  color: var(--cyan);
  opacity: .5;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1), opacity .25s ease;
}
.pp-quote:hover .pp-quote-icon { transform: scale(1.2) rotate(-8deg); opacity: .8; }
.pp-quote p { margin: 0; }

/* 联系卡片 */
.pp-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.pp-contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(248,250,252,.85);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text2);
  font-size: 13.5px;
  transition: background .22s ease, border-color .22s ease,
              transform .25s cubic-bezier(.34,1.56,.64,1), box-shadow .22s ease, color .22s ease;
  position: relative; overflow: hidden;
}
.pp-contact-item::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--acc), var(--cyan));
  transform: scaleY(0);
  transform-origin: center;
  transition: transform .28s cubic-bezier(.34,1.56,.64,1);
}
.pp-contact-item:hover {
  background: rgba(239,246,255,.9);
  border-color: #c3d8ff;
  transform: translateX(4px);
  box-shadow: 0 4px 16px rgba(37,99,235,.1);
  color: var(--acc);
}
.pp-contact-item:hover::before { transform: scaleY(1); }
.pp-contact-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  transition: transform .35s cubic-bezier(.34,1.56,.64,1);
}
.pp-contact-item:hover .pp-contact-icon { transform: rotate(-8deg) scale(1.12); }

/* 章节分隔线 */
.pp-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 4px 0;
}

@media(max-width:900px){ .pp-principles { grid-template-columns: repeat(2,1fr); } }
@media(max-width:640px){
  .pp-toc { grid-template-columns: repeat(2,1fr); }
  .pp-principles { grid-template-columns: repeat(2,1fr); }
  .pp-contact-grid { grid-template-columns: 1fr; }
}

.page-layout { display:grid; grid-template-columns:1fr 280px; gap:20px; align-items:start; }
.side-col .card:hover {
  transform: none;
}

.side-col {
  position: sticky;
  top: 40px; /* 导航栏高度 */
}
@media(max-width:768px){
  .page-layout {
    grid-template-columns: 1fr;
  }
  .side-col {
    position: static;
  }
}