/* ================================================================
   婚姻家事专题 · 全新设计 · 红白配色
   上海川汇律师事务所
   ================================================================ */

:root {
  --red: #C62828;
  --red-dk: #8B0000;
  --red-lt: #EF5350;
  --red-bg: #FFF5F5;
  --wht: #FFFFFF;
  --bg: #F9F9FB;
  --tx1: #1A1A1A;
  --tx2: #4A4A4A;
  --tx3: #888888;
  --bd: #E8E8EC;
  --sh: 0 2px 12px rgba(0,0,0,0.06);
  --sh-lg: 0 8px 32px rgba(0,0,0,0.10);
  --rd: 4px;
  --rd-lg: 8px;
  --mw: 1120px;
  --ff: -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  --tr: 0.25s ease;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--ff);color:var(--tx1);line-height:1.75;background:#fff;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%}

/* ---- 布局 ---- */
.wrap{max-width:var(--mw);margin:0 auto;padding:0 24px}
.sec{padding:80px 0}
.sec-tl{font-size:1.9rem;font-weight:700;color:var(--tx1);margin-bottom:8px}
.sec-st{font-size:1rem;color:var(--tx3);margin-bottom:48px}
.sec-dv{width:40px;height:3px;background:var(--red);margin-bottom:20px}
.bg-w{background:var(--wht)}
.bg-g{background:var(--bg)}

/* ---- 按钮 ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 32px;border-radius:var(--rd);font-size:0.95rem;font-weight:600;
  border:none;cursor:pointer;transition:var(--tr);font-family:var(--ff);white-space:nowrap
}
.btn-r{background:var(--red);color:#fff}
.btn-r:hover{background:var(--red-dk);transform:translateY(-1px);box-shadow:0 4px 16px rgba(198,40,40,0.3)}
.btn-w{background:#fff;color:var(--red);border:2px solid var(--red)}
.btn-w:hover{background:var(--red-bg)}
.btn-g{background:var(--tx1);color:#fff}
.btn-g:hover{background:#333;transform:translateY(-1px)}
.btn-lg{padding:16px 40px;font-size:1.05rem}

/* ---- 导航 ---- */
.nav{
  position:fixed;top:0;left:0;right:0;height:68px;background:#fff;
  z-index:1000;border-bottom:1px solid transparent;transition:var(--tr)
}
.nav.sc{border-bottom-color:var(--bd);box-shadow:0 1px 8px rgba(0,0,0,0.04)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-logo{font-size:1.1rem;font-weight:700;color:var(--red);letter-spacing:.5px}
.nav-logo span{font-weight:400;font-size:.75rem;color:var(--tx3);display:block;letter-spacing:1px}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{font-size:.88rem;color:var(--tx2);transition:var(--tr);font-weight:500}
.nav-links a:hover{color:var(--red)}
.nav-act{display:flex;align-items:center;gap:14px}
.nav-phone{color:var(--red);font-weight:700;font-size:1rem;letter-spacing:.5px}
.nav-phone:hover{opacity:.8}
.menu-btn{display:none;background:none;border:none;cursor:pointer;padding:4px}
.menu-btn span{display:block;width:22px;height:2px;background:var(--tx1);margin:5px 0;transition:var(--tr)}
.menu-btn.on span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.menu-btn.on span:nth-child(2){opacity:0}
.menu-btn.on span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ---- Hero ---- */
.hero{padding:120px 0 80px;background:var(--red-bg);border-bottom:1px solid rgba(198,40,40,0.08)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.hero-text .tag{display:inline-block;color:var(--red);font-size:.82rem;font-weight:600;margin-bottom:16px;letter-spacing:2px;text-transform:uppercase}
.hero-text h1{font-size:2.8rem;font-weight:800;line-height:1.22;margin-bottom:20px;letter-spacing:-.5px}
.hero-text h1 em{font-style:normal;color:var(--red)}
.hero-text p{font-size:1.05rem;color:var(--tx2);line-height:1.8;margin-bottom:32px;max-width:460px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-form{background:var(--wht);border-radius:var(--rd-lg);padding:32px 28px;box-shadow:var(--sh-lg);border:1px solid var(--bd)}
.hero-form h3{font-size:1.1rem;font-weight:700;margin-bottom:4px;color:var(--tx1)}
.hero-form > p{font-size:.82rem;color:var(--tx3);margin-bottom:20px}
.hero-fg{margin-bottom:14px}
.hero-fg input,.hero-fg textarea{
  width:100%;padding:12px 14px;border:1px solid var(--bd);border-radius:var(--rd);
  font-size:.9rem;font-family:var(--ff);transition:var(--tr);background:var(--bg);color:var(--tx1)
}
.hero-fg input:focus,.hero-fg textarea:focus{outline:none;border-color:var(--red);background:#fff;box-shadow:0 0 0 3px rgba(198,40,40,0.06)}
.hero-fg textarea{resize:vertical;min-height:72px}
.hero-fg input::placeholder,.hero-fg textarea::placeholder{color:#bbb}
.hero-form .btn{width:100%}
.hero-form-note{font-size:.75rem;color:var(--tx3);text-align:center;margin-top:10px}

/* ---- 快捷入口 ---- */
.quick-bar{padding:36px 0 0}
.quick-bar .wrap{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.quick-it{
  padding:14px 28px;background:#fff;border:1px solid var(--bd);border-radius:50px;
  font-size:.88rem;font-weight:500;color:var(--tx2);cursor:pointer;transition:var(--tr)
}
.quick-it:hover{background:var(--red);color:#fff;border-color:var(--red)}

/* ---- 通用卡片 ---- */
.card{
  background:#fff;border-radius:var(--rd-lg);padding:36px 40px;margin-bottom:20px;
  box-shadow:var(--sh);border:1px solid var(--bd)
}
.card h3{font-size:1.12rem;font-weight:700;color:var(--tx1);margin-bottom:14px}

/* ---- 列表项 ---- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.item{
  display:flex;gap:16px;padding:18px;background:var(--bg);border-radius:var(--rd);
  border:1px solid var(--bd);align-items:flex-start;transition:var(--tr)
}
.item:hover{border-color:var(--red);background:#fff}
.item-num{
  width:34px;height:34px;border-radius:50%;background:var(--red);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.82rem;flex-shrink:0
}
.item h4{font-size:.95rem;font-weight:600;color:var(--tx1);margin-bottom:3px}
.item p{font-size:.85rem;color:var(--tx3);line-height:1.6}

/* ---- 详情卡片 ---- */
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.detail{
  padding:20px;background:var(--bg);border-radius:var(--rd);border:1px solid var(--bd);transition:var(--tr)
}
.detail:hover{border-color:var(--red);box-shadow:0 2px 12px rgba(0,0,0,0.04)}
.detail h4{font-size:.95rem;font-weight:600;color:var(--tx1);margin-bottom:4px}
.detail p{font-size:.84rem;color:var(--tx3);line-height:1.6}

/* ---- 表格 ---- */
.tbl{overflow-x:auto;margin:18px 0}
.tbl table{width:100%;border-collapse:collapse;font-size:.88rem}
.tbl th{background:var(--red);color:#fff;padding:13px 16px;text-align:left;font-weight:600;white-space:nowrap}
.tbl td{padding:12px 16px;border-bottom:1px solid var(--bd);color:var(--tx2)}
.tbl tr:nth-child(even) td{background:var(--bg)}
.tbl tr:hover td{background:var(--red-bg)}

/* ---- 计算器 ---- */
.calc-wrap{max-width:760px;margin:0 auto}
.calc-box{background:#fff;border-radius:var(--rd-lg);padding:40px 44px;box-shadow:var(--sh);border:1px solid var(--bd)}
.calc-box h3{font-size:1.2rem;font-weight:700;text-align:center;margin-bottom:32px;color:var(--tx1)}
.fg{margin-bottom:18px}
.fg label{display:block;font-size:.9rem;font-weight:600;color:var(--tx1);margin-bottom:6px}
.fg label em{color:var(--red);font-style:normal}
.fg select,.fg input{
  width:100%;padding:12px 14px;border:1px solid var(--bd);border-radius:var(--rd);
  font-size:.9rem;font-family:var(--ff);transition:var(--tr);background:var(--bg);color:var(--tx1)
}
.fg select:focus,.fg input:focus{outline:none;border-color:var(--red);background:#fff;box-shadow:0 0 0 3px rgba(198,40,40,0.06)}
.fg .tip{font-size:.78rem;color:var(--tx3);margin-top:4px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.calc-out{margin-top:28px;padding:28px 32px;background:var(--red);border-radius:var(--rd);color:#fff;display:none}
.calc-out.show{display:block;animation:slideUp .4s ease}
.calc-out h4{font-size:1rem;font-weight:600;margin-bottom:14px}
.calc-out .line{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid rgba(255,255,255,0.15);font-size:.9rem}
.calc-out .line:last-child{border-bottom:none}
.calc-out .total{display:flex;justify-content:space-between;padding-top:14px;margin-top:8px;border-top:1px solid rgba(255,255,255,0.35);font-size:1.1rem;font-weight:700}
.calc-out .note{font-size:.78rem;color:rgba(255,255,255,0.7);margin-top:14px}
@keyframes slideUp{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}

/* ---- FAQ ---- */
.faq-wrap{max-width:760px;margin:0 auto}
.faq-item{border:1px solid var(--bd);border-radius:var(--rd);margin-bottom:8px;background:#fff;overflow:hidden}
.faq-q{
  padding:18px 24px;display:flex;justify-content:space-between;align-items:center;
  cursor:pointer;font-weight:600;font-size:.95rem;color:var(--tx1);transition:var(--tr);gap:16px
}
.faq-q:hover{color:var(--red)}
.faq-q .arr{font-size:1.2rem;color:var(--tx3);transition:var(--tr);flex-shrink:0;line-height:1}
.faq-item.open .faq-q .arr{transform:rotate(45deg);color:var(--red)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .3s ease}
.faq-item.open .faq-a{max-height:400px;padding:0 24px 18px}
.faq-a p{font-size:.9rem;color:var(--tx2);line-height:1.75}

/* ---- 表单区 ---- */
.form-sec{background:var(--red-bg);border-top:3px solid var(--red)}
.form-card{
  max-width:660px;margin:0 auto;background:#fff;
  border-radius:var(--rd-lg);padding:44px 48px;box-shadow:var(--sh-lg)
}
.form-card .fg label{color:var(--tx1)}
.form-card .fg input,.form-card .fg textarea{background:var(--bg)}
.form-card .fg textarea{width:100%;padding:12px 14px;border-radius:var(--rd);font-size:.9rem;font-family:var(--ff);resize:vertical;min-height:120px;border:1px solid var(--bd);transition:var(--tr);color:var(--tx1)}
.form-card .fg textarea:focus{outline:none;border-color:var(--red);background:#fff;box-shadow:0 0 0 3px rgba(198,40,40,0.06)}
.form-card .btn{width:100%}
.form-card .privacy{font-size:.78rem;color:var(--tx3);text-align:center;margin-top:10px}

/* ---- 底部 ---- */
.footer{background:#1A1A1A;color:rgba(255,255,255,0.6);padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:44px;margin-bottom:36px}
.footer h4{color:#fff;font-size:.95rem;font-weight:600;margin-bottom:16px}
.footer .f-brand{font-size:1rem;font-weight:700;color:#fff;margin-bottom:8px;display:block}
.footer .f-brand span{display:block;font-size:.75rem;font-weight:400;color:rgba(255,255,255,0.45);letter-spacing:1px}
.footer p{font-size:.88rem;line-height:1.7}
.footer ul li{padding:5px 0;font-size:.88rem}
.footer ul li a{color:rgba(255,255,255,0.55);transition:var(--tr)}
.footer ul li a:hover{color:var(--red-lt)}
.footer .f-info{margin-bottom:12px;font-size:.88rem;display:flex;gap:10px;align-items:flex-start}
.footer .f-dot{width:6px;height:6px;border-radius:50%;background:var(--red);flex-shrink:0;margin-top:8px}
.footer .f-phone{
  display:inline-flex;align-items:center;gap:8px;margin-top:10px;
  color:var(--red-lt);font-weight:700;font-size:1rem;transition:var(--tr)
}
.footer .f-phone:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:20px;text-align:center;font-size:.8rem;color:rgba(255,255,255,0.35)}

/* ---- 浮动按钮 ---- */
.float-btns{position:fixed;bottom:24px;right:24px;display:flex;flex-direction:column;gap:10px;z-index:998}
.float-btn{
  width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 16px rgba(0,0,0,0.18);transition:var(--tr);cursor:pointer;
  color:#fff;font-weight:700;font-size:1.1rem
}
.float-btn.red{background:var(--red)}
.float-btn.dark{background:var(--tx1)}
.float-btn:hover{transform:scale(1.1)}

/* ---- Toast ---- */
.toast{
  position:fixed;top:88px;left:50%;transform:translateX(-50%);
  background:var(--tx1);color:#fff;padding:14px 28px;border-radius:var(--rd);
  font-size:.9rem;z-index:9999;opacity:0;transition:opacity .3s;pointer-events:none;
  max-width:90vw;text-align:center
}
.toast.show{opacity:1}
.toast.ok{border-left:3px solid #4CAF50}
.toast.err{border-left:3px solid var(--red-lt)}

/* ---- 提示条 ---- */
.topbar{background:var(--tx1);color:#fff;text-align:center;padding:6px 0;font-size:.8rem;letter-spacing:1px}
.alert{padding:16px 20px;border-radius:var(--rd);margin:16px 0;font-size:.88rem;line-height:1.65}
.alert-red{background:var(--red-bg);border:1px solid rgba(198,40,40,0.15);color:var(--red-dk)}
.alert-y{background:#FFFDE7;border:1px solid #FFF176;color:#7D6608}
.quote{border-left:3px solid var(--red);padding:16px 20px;margin:16px 0;background:var(--bg);border-radius:0 var(--rd) var(--rd) 0;font-size:.9rem;color:var(--tx2);line-height:1.75}

/* ---- 渐入动画 ---- */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s,transform .6s}
.fade-in.vis{opacity:1;transform:translateY(0)}

/* ---- 响应式 ---- */
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-text p{max-width:100%}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  html{font-size:15px}
  .sec{padding:60px 0}
  .sec-tl{font-size:1.6rem}
  .nav-links{display:none;position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:20px;box-shadow:0 4px 20px rgba(0,0,0,0.06);gap:0;z-index:999}
  .nav-links.show{display:flex}
  .nav-links a{display:block;padding:14px 0;border-bottom:1px solid var(--bd);width:100%}
  .nav-links a:last-child{border-bottom:none}
  .nav-phone{display:none}
  .menu-btn{display:block}
  .hero{padding:100px 0 60px}
  .hero-text h1{font-size:2rem}
  .hero-form{padding:24px 20px}
  .quick-it{padding:10px 18px;font-size:.82rem}
  .grid-2{grid-template-columns:1fr}
  .detail-grid{grid-template-columns:1fr}
  .row2{grid-template-columns:1fr}
  .calc-box{padding:28px 24px}
  .form-card{padding:28px 24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .float-btns{bottom:16px;right:16px}
  .float-btn{width:44px;height:44px}
}

@media(max-width:400px){
  .hero-text h1{font-size:1.6rem}
  .hero-btns .btn{width:100%;justify-content:center}
  .quick-bar .wrap{gap:8px}
}