:root{--red:#E60012;--red-dark:#B8000E;--ink:#1A1A1A;--gray:#5A6472;--line:#E8E8EC;--bg:#F7F7F8;--card:#FFFFFF}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;color:var(--ink);background:var(--card);line-height:1.7;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{max-width:1160px;margin:0 auto;padding:0 20px}
/* header */
.hd{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:99}
.hd-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.hd .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px}
.hd .logo img{width:34px;height:34px;border-radius:8px;object-fit:cover}
.hd .logo small{font-weight:400;font-size:12px;color:var(--gray);margin-left:4px}
.hd nav{display:flex;gap:26px;font-size:14px}
.hd nav a:hover{color:var(--red)}
.hd .tel{font-weight:700;color:var(--red);font-size:15px}
/* hero */
.hero{background:linear-gradient(135deg,#C50010,#E60012 55%,#F5333F);color:#fff;padding:64px 0 56px}
.hero h1{font-size:34px;line-height:1.35;margin-bottom:14px;max-width:640px}
.hero p{font-size:16px;opacity:.92;max-width:600px;margin-bottom:26px}
.btn{display:inline-block;background:#fff;color:var(--red);font-weight:700;padding:13px 30px;border-radius:8px;font-size:16px;border:none;cursor:pointer}
.btn.ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.55);font-weight:500;margin-left:12px}
.btn.red{background:var(--red);color:#fff}
.btn:hover{opacity:.92}
.trust{display:flex;gap:22px;flex-wrap:wrap;margin-top:22px;font-size:13px;opacity:.9}
.trust span::before{content:"✓ ";font-weight:700}
/* sections */
.sec{padding:56px 0}
.sec.alt{background:var(--bg)}
.sec h2{font-size:26px;margin-bottom:8px}
.sec .lead{color:var(--gray);margin-bottom:28px;max-width:760px}
.grid{display:grid;gap:16px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px}
.card h3{font-size:17px;margin-bottom:8px}
.card p{font-size:14px;color:var(--gray)}
.card .tag{display:inline-block;font-size:12px;color:var(--red);font-weight:600;margin-bottom:8px}
/* platform chips */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{background:#fff;border:1px solid var(--line);border-radius:8px;padding:9px 16px;font-size:14px;transition:.15s}
.chip:hover{border-color:var(--red);color:var(--red)}
/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.step{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}
.step b{color:var(--red);font-size:13px}
.step h4{font-size:16px;margin:6px 0}
.step p{font-size:14px;color:var(--gray)}
/* flow 九步流程图 */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.flow-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 16px 18px;position:relative;display:flex;gap:12px}
.flow-card::after{content:"";position:absolute;right:-11px;top:50%;width:8px;height:8px;border-top:2px solid #D9DDE4;border-right:2px solid #D9DDE4;transform:translateY(-50%) rotate(45deg)}
.flow-card:nth-child(5n)::after,.flow-card:nth-child(10n)::after{display:none}
.flow-card .fc-no{flex:0 0 30px;height:30px;border-radius:50%;background:var(--red);color:#fff;font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center}
.flow-card .fc-body h4{font-size:14.5px;line-height:1.45;margin-bottom:4px}
.flow-card .fc-body p{font-size:12.5px;color:var(--gray);line-height:1.55}
.flow-card.work .fc-no{background:#C77A0A}
.flow-card.done .fc-no{background:#1B7A4B}
.flow-note{background:var(--bg);border-left:4px solid var(--red);border-radius:8px;padding:16px 18px;margin-top:20px;font-size:14px;color:#333;line-height:1.75}
.flow-note b{color:var(--red)}
@media(max-width:1100px){.flow{grid-template-columns:repeat(3,1fr)}.flow-card:nth-child(3n)::after{display:none}}

.art{max-width:800px;margin:0 auto;padding:36px 20px 64px}
.art h1{font-size:27px;line-height:1.4;margin-bottom:10px}
.art .meta{font-size:13px;color:#999;margin-bottom:26px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.art h2{font-size:20px;margin:30px 0 12px;padding-left:12px;border-left:4px solid var(--red)}
.art h3{font-size:16px;margin:20px 0 8px}
.art p{margin-bottom:14px;color:#333}
.art ul,.art ol{margin:0 0 14px 22px;color:#333}
.art li{margin-bottom:6px}
.art .sum{background:#FFF3F3;border:1px solid #FFD9DC;border-radius:10px;padding:16px 18px;margin-bottom:22px;font-size:14.5px}
/* 首屏快答卡：四条核心答案前置，降低跳出率（移动端优先阅读） */
.quick-ans{border:1px solid #E8E8E8;border-radius:10px;overflow:hidden;margin-bottom:24px}
.quick-ans .qa-h{background:#F7F7F7;padding:10px 16px;font-size:13.5px;font-weight:600;color:#333;border-bottom:1px solid #E8E8E8}
.quick-ans .qa-row{display:flex;gap:14px;padding:11px 16px;border-bottom:1px solid #F0F0F0;font-size:14px;line-height:1.65}
.quick-ans .qa-row:last-child{border-bottom:0}
.quick-ans .qa-k{flex:0 0 96px;color:#8A8A8A;font-weight:500}
.quick-ans .qa-v{flex:1;color:#333}
@media(max-width:600px){.quick-ans .qa-row{flex-direction:column;gap:2px;padding:10px 14px}.quick-ans .qa-k{flex:none;font-size:12.5px}}
.case-note{background:#F4F8FF;border:1px solid #D6E4FB;border-left:4px solid #2F6BD6;border-radius:10px;padding:14px 16px;margin:24px 0;font-size:14px;color:#33475B;line-height:1.7}
.art table{width:100%;border-collapse:collapse;margin:14px 0 20px;font-size:14px}
.art th{background:#1F1F1F;color:#fff;padding:10px 12px;text-align:left;font-weight:500}
.art td{border:1px solid var(--line);padding:10px 12px}
.art tr:nth-child(even) td{background:var(--bg)}
.note{font-size:12.5px;color:#999;margin-top:18px}
/* cta box */
.cta-box{background:#1F1F1F;color:#fff;border-radius:14px;padding:28px;margin:36px 0 0}
.cta-box h3{font-size:19px;margin-bottom:8px}
.cta-box p{color:#B9BDC6;font-size:14px;margin-bottom:16px}
/* faq */
.faq{border:1px solid var(--line);border-radius:10px;margin-bottom:12px;overflow:hidden;background:#fff}
.faq summary{padding:14px 18px;font-weight:600;cursor:pointer;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::marker{display:none;content:""}
.faq summary::after{content:"+";color:#BBB;font-weight:400;font-size:18px;line-height:1}
.faq[open] summary{color:var(--red)}
.faq[open] summary::after{content:"−"}
.faq .a{padding:2px 18px 16px;font-size:14px;color:var(--gray)}
/* 品类概览（名录页顶部） */
.ovwrap{margin:26px 0 8px}
.ovh{font-size:21px;margin:0 0 6px;padding-left:12px;border-left:4px solid var(--red)}
.ovsub{font-size:14px;color:var(--gray);margin-bottom:16px}
.ovgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.ovcard{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 18px 14px;display:flex;flex-direction:column}
.ovcard .ovtag{display:inline-block;align-self:flex-start;background:#FFF0F1;color:var(--red);font-size:12.5px;font-weight:700;padding:3px 10px;border-radius:20px;margin-bottom:10px}
.ovcard h4{font-size:15px;line-height:1.45;margin-bottom:8px}
.ovcard p{font-size:14px;color:var(--gray);line-height:1.65;flex:1}
.ovbar{display:flex;align-items:center;gap:6px;margin-top:12px;padding-top:10px;border-top:1px dashed var(--line);font-size:12px;color:#8A6A2A}
.ovbar .dot{width:6px;height:6px;border-radius:50%;background:#C77A0A;flex:0 0 6px}
.ovcard.cc .ovtag{background:#EEF3FF;color:#2050B8}
.ovcard.cc .ovbar{color:#2B4A8A}
.ovcard.cc .ovbar .dot{background:#2050B8}
.ovnote{background:#FFF8E9;border:1px solid #F5E2BC;border-radius:10px;padding:15px 18px;margin-top:26px;font-size:13.5px;line-height:1.75;color:#6B5220}
.ovlaw{display:block;margin-top:7px;font-size:12px;color:#9A9DA4;line-height:1.5}
.ovnote b{color:#A8562C}
@media(max-width:1100px){.ovgrid{grid-template-columns:repeat(2,1fr)}}
/* 微信二维码模块 */
.qr-box{display:flex;gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;margin-top:8px;max-width:620px}
.qr-img img{display:block;width:132px;height:132px;border-radius:8px;border:1px solid var(--line)}
.qr-txt h3{font-size:18px;margin-bottom:6px}
.qr-txt p{font-size:13.5px;color:var(--gray);margin-bottom:10px}
.qr-txt ul{list-style:none;font-size:12.5px;color:#666}
.qr-txt li{margin-bottom:5px;padding-left:16px;position:relative}
.qr-txt li::before{content:"✓";position:absolute;left:0;color:var(--red);font-weight:700}
.hd-wx{display:flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;color:var(--red);white-space:nowrap;cursor:pointer}
.hd-wx:hover{opacity:.85}
.hd-wx img{width:26px;height:26px;border-radius:4px}
/* 微信弹窗 */
.wx-modal{position:fixed;inset:0;z-index:200}
.wxm-mask{position:absolute;inset:0;background:rgba(0,0,0,.55)}
.wxm-panel{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:#fff;border-radius:16px;padding:28px 26px 24px;width:min(88vw,340px);text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.wxm-panel img{display:block;margin:0 auto 14px;width:210px;height:210px;border-radius:10px}
.wxm-panel h3{font-size:18px;margin-bottom:6px}
.wxm-panel p{font-size:13.5px;color:var(--gray);line-height:1.7;margin-bottom:10px}
.wxm-tip{display:inline-block;background:#FFF3F3;color:var(--red);font-size:12.5px;font-weight:600;padding:5px 14px;border-radius:20px}
.wxm-x{position:absolute;right:10px;top:8px;background:none;border:0;font-size:26px;color:#999;cursor:pointer;line-height:1;padding:4px 8px}
.wxm-x:hover{color:var(--ink)}
/* 右侧固定客服悬浮按钮：全站常驻，点击弹出微信二维码（data-wx 由 FOOT_NAV 内脚本统一绑定） */
.float-wx{position:fixed;right:16px;top:58%;transform:translateY(-50%);z-index:99;width:54px;height:54px;border-radius:50%;border:0;cursor:pointer;background:linear-gradient(135deg,#F04B32,#C7271B);color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(199,39,27,.38);font-family:inherit;padding:0}
.float-wx .fw-ring{position:absolute;inset:0;border-radius:50%;box-shadow:0 0 0 0 rgba(240,75,50,.45);animation:fwPulse 2.4s ease-out infinite}
.float-wx svg{width:23px;height:23px;fill:#fff;position:relative}
.float-wx .fw-t{font-size:10.5px;font-weight:700;margin-top:1px;letter-spacing:1px;position:relative}
.float-wx::after{content:"微信免费核账";position:absolute;right:64px;top:50%;transform:translateY(-50%);white-space:nowrap;background:#141414;color:#fff;font-size:12px;padding:6px 11px;border-radius:6px;opacity:0;pointer-events:none;transition:opacity .18s}
.float-wx:hover{background:linear-gradient(135deg,#FF5A40,#D6301F)}
.float-wx:hover::after{opacity:1}
@keyframes fwPulse{0%{box-shadow:0 0 0 0 rgba(240,75,50,.45)}70%{box-shadow:0 0 0 12px rgba(240,75,50,0)}100%{box-shadow:0 0 0 0 rgba(240,75,50,0)}}
@media(max-width:860px){.float-wx{top:auto;bottom:82px;transform:none;width:50px;height:50px;right:12px}.float-wx::after{display:none}}
@media(prefers-reduced-motion:reduce){.float-wx .fw-ring{animation:none}}
.burger{display:none;background:none;border:0;width:34px;height:34px;padding:6px;cursor:pointer}
.burger span{display:block;height:2px;background:var(--ink);margin:4px 0;border-radius:2px}
/* footer */
.ft{background:#141414;color:#9AA0AA;padding:48px 0 28px;font-size:13px;margin-top:64px}
.ft h4{color:#fff;font-size:14px;margin-bottom:12px}
.ft a{display:block;margin-bottom:8px;color:#9AA0AA}
.ft a:hover{color:#fff}
.ft-grid{display:grid;grid-template-columns:1.8fr 1fr 1fr 1fr 1fr;gap:24px;margin-bottom:28px}
.ft-bot{border-top:1px solid #2A2A2A;padding-top:18px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;color:#6B7078;font-size:12px}
/* 全站风险提示条（借鉴卡大侠固定风险提示，依本站合规口径改写） */
.risk-note{background:#FBF6EE;border-top:3px solid #E8A33D;border-bottom:1px solid #F0E0C0;padding:22px 0;font-size:13.5px;color:#5A4A2E;margin-top:64px}
.risk-note h4{font-size:15px;color:#8A5A12;margin:0 0 12px}
.risk-note ul{margin:0;padding-left:20px;display:grid;grid-template-columns:1fr 1fr;gap:6px 28px}
.risk-note li{margin-bottom:6px;line-height:1.65}
.risk-note .rn-more{margin:12px 0 0;color:#8A5A12}
.risk-note a{color:#B5531A;text-decoration:underline}
/* calc */
/* contact */
.contact-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:640px}
.contact-cards .card{text-align:center}
.contact-cards b{display:block;font-size:18px;margin:6px 0}
/* mobile */
@media(max-width:860px){
.g3,.g4,.steps,.contact-cards,.flow{grid-template-columns:1fr}
.flow-card::after{display:none}
/* 移动端导航：默认收起，汉堡展开为下拉面板 */
.burger{display:block}
.hd nav{display:none}
body.nav-open .hd nav{display:flex;flex-direction:column;position:absolute;left:0;right:0;top:64px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 8px 20px rgba(0,0,0,.06);padding:6px 0;gap:0;z-index:99}
body.nav-open .hd nav a{padding:13px 20px;font-size:15px;border-bottom:1px solid #F2F2F4}
body.nav-open .hd nav a:last-child{border-bottom:0}
.hd .hd-in{position:relative}
.hd .logo{font-size:17px}
.hd .logo small{display:none}
.hero h1{font-size:25px;line-height:1.4}
.hero{padding:44px 0 38px}
.hero p{font-size:14.5px}
.btn{padding:12px 22px;font-size:15px}
.btn.ghost{margin-left:8px}
.sec{padding:38px 0}
.sec h2,.art h2{font-size:20px}
.art{font-size:15px}
.art h1{font-size:22px}
.qr-box{flex-direction:column;text-align:center;gap:16px;padding:22px 18px}
.qr-txt ul{text-align:left;display:inline-block}
.ft-grid{grid-template-columns:1fr 1fr;gap:22px}
.ft{padding:36px 0 24px;margin-top:44px;font-size:12.5px}
.mob-bar{position:fixed;bottom:0;left:0;right:0;z-index:98;display:block;width:100%;background:var(--red);color:#fff;border:0;padding:14px 0 calc(14px + env(safe-area-inset-bottom));font-weight:700;font-size:15px;text-align:center;cursor:pointer;font-family:inherit}

body{padding-bottom:52px}

.chip{padding:8px 13px;font-size:14px}
.ovh{font-size:18px}
.ovcard{padding:16px}
}
@media(max-width:560px){
.ovgrid{grid-template-columns:1fr}
.ft-grid{grid-template-columns:1fr}
.hd .logo small{display:none}
.hd-wx span{display:none}
.hero h1{font-size:22px}
.art table{font-size:13px}
.art th,.art td{padding:8px 8px}
}
@media(min-width:861px){.mob-bar{display:none}.burger{display:none}}

/* 面包屑 */
.crumb{font-size:13px;color:#999;padding:14px 0 2px;line-height:1.6}
.crumb a{color:#999;text-decoration:none}
.crumb a:hover{color:var(--red)}
.crumb b{color:#555;font-weight:600}