*{margin:0;padding:0;box-sizing:border-box}
:root{--o:#d62828;--od:#a61b1b;--ol:#f4633a;--bg:#fff8f3;--tx:#1f2328;--tx2:#5a6472;--bd:#f0e2d8;--w:1200px}
body{font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",-apple-system,sans-serif;color:var(--tx);background:#fff;line-height:1.75;font-size:15px}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--w);margin:0 auto;padding:0 20px}
.center{text-align:center}
.btn{display:inline-block;background:linear-gradient(135deg,var(--o),var(--ol));color:#fff;padding:13px 30px;border-radius:8px;font-weight:700;font-size:16px;transition:.2s;border:none;cursor:pointer}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(214,40,40,.3)}
.btn-line{background:#fff;color:var(--o);border:2px solid var(--o)}
.btn-line:hover{background:var(--bg);color:var(--o)}
.btn-white{background:#fff;color:var(--o)}
.btn-ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.7)}
.btn-block{display:block;width:100%;text-align:center}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:18px}
.btn-row.center{justify-content:center}
/* header */
.site-header{background:#fff;border-bottom:1px solid var(--bd);position:sticky;top:0;z-index:99}
.head-inner{display:flex;align-items:center;gap:22px;height:70px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{background:linear-gradient(135deg,var(--o),var(--ol));color:#fff;font-weight:800;font-size:19px;padding:8px 11px;border-radius:8px}
.logo-txt{font-weight:700;font-size:16px;line-height:1.2;display:flex;flex-direction:column}
.logo-txt em{font-style:normal;font-size:11px;color:var(--tx2);font-weight:400}
.nav-list{list-style:none;display:flex;gap:2px;flex:1}
.nav-item{position:relative}
.nav-item>a{display:flex;align-items:center;gap:4px;padding:8px 13px;border-radius:7px;font-weight:500;white-space:nowrap}
.nav-item>a:hover,.nav-item:hover>a{background:var(--bg);color:var(--o)}
.caret{font-size:10px;opacity:.6}
.submenu{position:absolute;left:0;top:100%;min-width:164px;background:#fff;border:1px solid var(--bd);border-radius:10px;box-shadow:0 10px 28px rgba(0,0,0,.1);padding:8px;list-style:none;opacity:0;visibility:hidden;transform:translateY(8px);transition:.18s;z-index:120}
.nav-item:hover .submenu{opacity:1;visibility:visible;transform:translateY(0)}
.submenu li a{display:block;padding:8px 12px;border-radius:7px;font-size:14px;white-space:nowrap}
.submenu li a:hover{background:var(--bg);color:var(--o)}
.hd-tel{text-align:right;line-height:1.2}
.hd-tel span{display:block;font-size:12px;color:var(--tx2)}
.hd-tel a{font-size:20px;font-weight:800;color:var(--o)}
.menu-btn{display:none;background:none;border:none;font-size:22px}
/* banner */
.banner{background:linear-gradient(135deg,var(--od),var(--o) 60%,var(--ol));color:#fff;padding:44px 0 38px}
.banner h1{font-size:30px;font-weight:800;margin-bottom:8px}
.banner p{opacity:.92}
.crumb{margin-top:14px;font-size:13px;opacity:.9}
.crumb a{margin-right:6px}
.crumb a:hover{text-decoration:underline}
/* hero */
.hero{background:linear-gradient(160deg,#fff6ef,#ffe9d9);padding:56px 0}
.hero-in{display:grid;grid-template-columns:1.35fr 1fr;gap:40px;align-items:center}
.tag{background:#fff;border:1px solid var(--ol);color:var(--od);display:inline-block;padding:5px 14px;border-radius:20px;font-size:13px;font-weight:600}
.hero h1{font-size:42px;line-height:1.28;margin:16px 0;font-weight:800}
.hero h1 span{color:var(--o);font-size:26px}
.lead{font-size:16px;color:var(--tx2);margin-bottom:22px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.hero-tags{list-style:none;display:flex;gap:10px;flex-wrap:wrap}
.hero-tags li{background:#fff;border-radius:20px;padding:5px 14px;font-size:13px;color:var(--od);border:1px solid var(--bd)}
.hero-card{background:#fff;border-radius:14px;padding:26px;box-shadow:0 14px 40px rgba(214,40,40,.13)}
.hero-card h3{margin-bottom:16px;font-size:19px}
label{display:block;margin-bottom:13px;font-size:13px;color:var(--tx2)}
input,select,textarea{width:100%;padding:11px 13px;border:1px solid var(--bd);border-radius:8px;font-family:inherit;font-size:14px;margin-top:6px;background:#fff;color:var(--tx)}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--o)}
.tiny{font-size:12px;color:var(--tx2);margin-top:10px}
/* section */
.sec{padding:56px 0}
.sec-alt{background:var(--bg)}
.sec-t{font-size:27px;font-weight:800;text-align:center;margin-bottom:8px}
.sec-t.mt{margin-top:48px;text-align:left;border-left:5px solid var(--o);padding-left:12px}
.sec-s{text-align:center;color:var(--tx2);margin-bottom:32px}
.grid2,.grid3,.grid4{display:grid;gap:22px}
.grid2{grid-template-columns:1fr 1fr}
.grid3{grid-template-columns:repeat(3,1fr)}
.grid4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--bd);border-radius:12px;padding:24px;transition:.2s}
.card:hover{border-color:var(--ol);transform:translateY(-3px);box-shadow:0 12px 28px rgba(214,40,40,.12)}
.card h3{font-size:18px;margin-bottom:10px}
.card h3::before{content:"";display:inline-block;width:8px;height:16px;background:var(--o);border-radius:2px;margin-right:8px;vertical-align:-2px}
.card p{color:var(--tx2);font-size:14px}
.ico{width:44px;height:44px;border-radius:10px;background:linear-gradient(135deg,var(--o),var(--ol));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;margin-bottom:12px}
.svc-sub{color:var(--od);font-weight:600;font-size:14px;margin-bottom:8px}
.panel{background:#fff;border:1px solid var(--bd);border-radius:12px;padding:26px;margin-bottom:22px}
.panel h2{font-size:22px;margin-bottom:14px}
.panel h3{font-size:18px;margin-bottom:12px}
.panel p{margin-bottom:12px}
.hero-panel{background:linear-gradient(135deg,#fff7f1,#ffeade)}
.tip{background:#f6f7f9;border-left:4px solid var(--o);padding:11px 15px;font-size:14px;color:var(--tx2);border-radius:0 8px 8px 0;margin-top:12px}
/* table */
.tbl{width:100%;border-collapse:collapse;background:#fff;font-size:14px}
.tbl th,.tbl td{border:1px solid var(--bd);padding:11px 13px;text-align:left}
.tbl thead th{background:var(--o);color:#fff}
.tbl-info th{background:var(--bg);width:150px;font-weight:600}
.big-tel{font-size:22px;font-weight:800;color:var(--o)}
/* list */
.tick{list-style:none;margin-top:10px}
.tick li{padding-left:20px;position:relative;font-size:14px;color:var(--tx2);margin-bottom:5px}
.tick li::before{content:"✓";position:absolute;left:0;color:var(--o);font-weight:800}
.tick.big li{font-size:15px;margin-bottom:9px}
.dot{list-style:none;margin:12px 0}
.dot li{padding-left:18px;position:relative;margin-bottom:8px}
.dot li::before{content:"●";position:absolute;left:0;color:var(--o);font-size:11px;top:5px}
.ol{padding-left:22px}
.ol li{margin-bottom:10px;color:var(--tx2)}
.ol b{color:var(--tx)}
.linklist{list-style:none}
.linklist li{padding:7px 0;border-bottom:1px dashed var(--bd);font-size:14px;color:var(--tx2)}
.linklist li:hover{color:var(--o)}
.linklist a{color:var(--o)}
.steps{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:s}
.steps li{background:#fff;border:1px solid var(--bd);border-radius:10px;padding:20px 16px;counter-increment:s;position:relative}
.steps li::before{content:counter(s);position:absolute;top:-12px;left:16px;width:26px;height:26px;border-radius:50%;background:var(--o);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px}
.steps b{display:block;margin-bottom:6px;font-size:15px}
.steps span{font-size:13px;color:var(--tx2)}
.more{color:var(--o);font-weight:600;font-size:14px;display:inline-block;margin-top:10px}
.more-wrap{text-align:center;margin-top:28px}
/* city */
.city-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:12px}
.city-grid.big{grid-template-columns:repeat(5,1fr)}
.city{background:#fff;border:1px solid var(--bd);border-radius:10px;padding:16px 10px;text-align:center;transition:.2s;font-weight:600}
.city:hover{background:var(--o);color:#fff;border-color:var(--o);transform:translateY(-3px)}
.city span{display:block;font-size:12px;color:var(--tx2);font-weight:400;margin-top:2px}
.city:hover span{color:#ffe8d9}
/* faq */
.faq-list{max-width:960px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--bd);border-radius:10px;margin-bottom:12px;overflow:hidden}
.faq-item summary{padding:16px 20px;cursor:pointer;font-weight:600;display:flex;align-items:center;gap:12px;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.q-no{background:var(--bg);color:var(--od);border-radius:6px;padding:2px 9px;font-size:13px;font-weight:800;flex-shrink:0}
.faq-item[open] .q-no{background:var(--o);color:#fff}
.arrow{margin-left:auto;color:var(--o);transition:.2s}
.faq-item[open] .arrow{transform:rotate(180deg)}
.faq-a{padding:0 20px 18px 20px;color:var(--tx2);font-size:14.5px;border-top:1px dashed var(--bd);padding-top:14px;margin:0 20px 18px}
.toc{columns:2;column-gap:30px;padding-left:22px;font-size:14px}
.toc li{margin-bottom:8px;break-inside:avoid}
.toc a{color:var(--tx2)}
.toc a:hover{color:var(--o)}
/* news */
.cat-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}
.cat-bar a{padding:6px 16px;border-radius:20px;background:#fff;border:1px solid var(--bd);font-size:14px}
.cat-bar a.active,.cat-bar a:hover{background:var(--o);color:#fff;border-color:var(--o)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:#fff;border:1px solid var(--bd);border-radius:12px;padding:22px;transition:.2s;display:flex;flex-direction:column}
.news-card:hover{border-color:var(--ol);transform:translateY(-4px);box-shadow:0 12px 28px rgba(214,40,40,.12)}
.news-card h3{font-size:16.5px;line-height:1.5;margin:8px 0}
.news-card p{font-size:13.5px;color:var(--tx2);flex:1}
.cat{background:var(--bg);color:var(--od);padding:2px 10px;border-radius:5px;font-size:12px;align-self:flex-start;font-weight:600}
.date{color:#9aa4b0;font-size:12.5px;margin-top:10px}
.news-item{display:flex;gap:24px;background:#fff;border:1px solid var(--bd);border-radius:12px;padding:22px;margin-bottom:18px}
.ni-date{text-align:center;min-width:78px;border-right:1px solid var(--bd);padding-right:20px}
.ni-date b{display:block;font-size:34px;color:var(--o);font-weight:800;line-height:1.1}
.ni-date span{font-size:12px;color:#9aa4b0}
.ni-body{flex:1}
.ni-body h2{font-size:19px;margin:8px 0}
.ni-body p{color:var(--tx2);font-size:14.5px}
.ni-meta{display:flex;justify-content:space-between;font-size:13px;color:#9aa4b0}
.ni-meta a{color:var(--o)}
/* article */
.article-wrap{display:grid;grid-template-columns:1fr 320px;gap:32px}
.article{background:#fff;border:1px solid var(--bd);border-radius:12px;padding:34px}
.art-meta{display:flex;gap:16px;font-size:13px;color:#9aa4b0;padding-bottom:16px;border-bottom:1px solid var(--bd);margin-bottom:20px}
.art-lead{font-size:16px;color:var(--od);background:var(--bg);padding:16px 18px;border-radius:8px;font-weight:500}
.article p{margin-bottom:16px;color:#333}
.article h2{font-size:20px;margin:26px 0 12px;padding-left:10px;border-left:4px solid var(--o)}
.art-cta{background:var(--bg);border-radius:10px;padding:18px 22px;margin-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-weight:600}
.art-cta a{color:var(--o)}
.aside .panel{background:var(--bg)}
/* service rows */
.svc-row{display:grid;grid-template-columns:1.4fr 1fr;gap:30px;background:#fff;border:1px solid var(--bd);border-radius:14px;padding:30px;margin-bottom:24px}
.svc-row h2{font-size:24px;margin-bottom:4px}
.svc-l p{color:var(--tx2);margin-bottom:12px}
.svc-fit b{color:var(--tx)}
.svc-r{background:var(--bg);border-radius:10px;padding:22px}
/* cta */
.cta{background:linear-gradient(135deg,var(--od),var(--o) 55%,var(--ol));color:#fff;padding:46px 0}
.cta-in{display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap}
.cta h2{font-size:26px;margin-bottom:8px}
.cta-btns{display:flex;gap:14px;flex-wrap:wrap}
.logo-img{height:48px;width:48px;object-fit:contain;flex-shrink:0}
.prose{max-width:960px}
.prose p{margin-bottom:14px;color:#333;font-size:15px;line-height:1.9}
a.card{display:block}
.icp{color:var(--ol);border-bottom:1px solid rgba(244,99,58,.45);transition:.2s;padding-bottom:1px}
.icp:hover{color:var(--ol);border-bottom-color:var(--ol);background:rgba(244,99,58,.08);border-radius:3px}
.panel .icp,.grid2 .icp,.tiny .icp{color:var(--od)}
/* sitemaps page */
.sm-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.sm-grid.city-sm{grid-template-columns:repeat(7,1fr)}
.sm-item{background:#fff;border:1px solid var(--bd);border-radius:9px;padding:13px 15px;transition:.2s;display:block}
.sm-item:hover{border-color:var(--ol);background:var(--bg);transform:translateY(-2px)}
.sm-item b{display:block;font-size:14.5px;margin-bottom:2px}
.sm-item span{font-size:12.5px;color:var(--tx2);line-height:1.5;display:block}
@media(max-width:980px){.sm-grid,.sm-grid.city-sm{grid-template-columns:repeat(2,1fr)}}
/* case */
.stat-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:28px}
.stat{background:linear-gradient(135deg,var(--o),var(--ol));color:#fff;border-radius:12px;padding:22px;text-align:center}
.stat b{display:block;font-size:32px;font-weight:800;line-height:1.2}
.stat span{font-size:13px;opacity:.92}
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.filter-bar a{padding:6px 16px;border-radius:20px;background:#fff;border:1px solid var(--bd);font-size:14px}
.filter-bar a.active,.filter-bar a:hover{background:var(--o);color:#fff;border-color:var(--o)}
.case-grp{font-size:19px;margin:30px 0 16px;padding-left:11px;border-left:5px solid var(--o)}
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.case-grid.three{grid-template-columns:repeat(3,1fr)}
.case-card{background:#fff;border:1px solid var(--bd);border-radius:12px;padding:24px;transition:.2s;display:flex;flex-direction:column}
.case-card:hover{border-color:var(--ol);transform:translateY(-4px);box-shadow:0 12px 28px rgba(214,40,40,.13)}
.c-ind{background:var(--bg);color:var(--od);padding:3px 11px;border-radius:5px;font-size:12px;align-self:flex-start;font-weight:600}
.case-card h3{font-size:17.5px;margin:10px 0 8px;line-height:1.5}
.case-card>p{font-size:14px;color:var(--tx2);flex:1}
.c-res{display:flex;gap:10px;margin:12px 0;flex-wrap:wrap}
.c-res span{background:var(--bg);border-radius:8px;padding:7px 13px;text-align:center;flex:1;min-width:110px}
.c-res b{display:block;color:var(--o);font-size:18px;font-weight:800}
.c-res em{font-style:normal;font-size:12px;color:var(--tx2)}
.c-plan{font-size:13px;color:var(--od);border-top:1px dashed var(--bd);padding-top:10px}
.case-info{margin-bottom:24px}
.res-wrap{display:flex;flex-direction:column;gap:10px}
.res-item{display:flex;align-items:center;gap:14px;background:var(--bg);border-radius:10px;padding:14px 18px;flex-wrap:wrap}
.r-name{font-weight:700;min-width:130px}
.r-before{color:var(--tx2);font-size:14px;text-decoration:line-through}
.r-arrow{color:var(--o);font-weight:800}
.r-after{font-size:14.5px}
.r-after b{color:var(--o);font-size:17px}
.quote{background:var(--bg);border-left:5px solid var(--o);border-radius:0 10px 10px 0;padding:20px 24px;margin:0;font-size:16px}
.quote cite{display:block;margin-top:10px;font-size:14px;color:var(--tx2);font-style:normal}
@media(max-width:980px){.stat-bar,.case-grid,.case-grid.three{grid-template-columns:1fr}}
/* pricing */
.sec-price{background:var(--bg)}
.price-lead{text-align:center;margin-bottom:26px;color:var(--tx2)}
.price-lead b{color:var(--od);font-size:20px;margin:0 4px}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.price-card{background:#fff;border:2px solid var(--bd);border-radius:14px;padding:28px 24px;display:flex;flex-direction:column;position:relative}
.price-card.hl{border-color:var(--o);box-shadow:0 14px 36px rgba(214,40,40,.16)}
.p-tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--o),var(--ol));color:#fff;padding:3px 16px;border-radius:20px;font-size:12.5px;font-weight:700;white-space:nowrap}
.price-card h3{font-size:19px;margin-bottom:8px}
.p-num{color:var(--o);font-weight:800;margin-bottom:10px;line-height:1.1}
.p-num em{font-style:normal;font-size:20px;margin-right:2px}
.p-num span{font-size:14px;color:var(--tx2);font-weight:500;margin-left:4px}
.p-desc{font-size:14px;color:var(--tx2);min-height:44px;padding-bottom:12px;border-bottom:1px dashed var(--bd)}
.price-card .tick{flex:1;padding-top:10px}
.p-note{font-size:12.5px;color:#9aa4b0;margin:10px 0 16px}
.btn-line-w{display:block;width:100%;text-align:center;background:#fff;color:var(--o);border:2px solid var(--o);padding:12px;border-radius:8px;font-weight:700}
.btn-block-w{display:block;width:100%;text-align:center;background:linear-gradient(135deg,var(--o),var(--ol));color:#fff;padding:12px;border-radius:8px;font-weight:700}
.btn-line-w:hover{background:var(--bg)}
.price-compare{background:#fff;border:1px solid var(--bd);border-radius:10px;padding:15px 20px;margin:22px 0 10px;font-size:14.5px}
.price-compare b{color:var(--od)}
@media(max-width:980px){.price-grid{grid-template-columns:1fr}}
/* footer */
.site-footer{background:#191d24;color:#b9c0c9;padding:48px 0 0;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:30px;padding-bottom:34px}
.site-footer h3{color:#fff;font-size:18px;margin-bottom:12px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:12px}
.site-footer p{margin-bottom:8px}
.f-tel a{font-size:24px;font-weight:800;color:var(--ol)}
.f-hours{font-size:13px;color:#8b939d}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:7px}
.site-footer li a:hover{color:var(--ol)}
.f-city{display:grid;grid-template-columns:1fr 1fr;gap:4px 12px}
.f-city a{font-size:13.5px}
.site-footer a:hover{color:var(--ol)}
.foot-friend{border-top:1px solid #262c34;border-bottom:1px solid #262c34;padding:14px 0;font-size:13px}
.foot-friend span{color:#8b939d}
.foot-friend a{margin-right:16px;color:#9aa4b0}
.copy{padding:18px 0 26px;text-align:center;font-size:12.5px;color:#8b939d}
.copy p{margin-bottom:3px}
.copy .tips{color:#6f7883;font-size:12px;margin-top:6px}
.nf{padding:90px 0}
.nf h1{font-size:88px;color:var(--o);font-weight:800;text-align:center;line-height:1}
.nf p{text-align:center;color:var(--tx2);margin:16px 0 8px;font-size:17px}
@media(max-width:980px){
 .grid2,.grid3,.grid4,.hero-in,.svc-row,.article-wrap{grid-template-columns:1fr}
 .steps{grid-template-columns:1fr 1fr}
 .city-grid,.city-grid.big{grid-template-columns:repeat(3,1fr)}
 .foot-grid{grid-template-columns:1fr 1fr}
 .hero h1{font-size:32px}
 .hd-tel{margin-left:auto}
 .toc{columns:1}
 .cta-in{flex-direction:column;align-items:flex-start}
}
@media(max-width:600px){
 .grid4,.city-grid,.city-grid.big,.steps,.foot-grid{grid-template-columns:1fr 1fr}
 .banner h1{font-size:22px}
 .hero h1{font-size:26px}
 .sec{padding:38px 0}
 .head-inner{gap:10px}
 .logo-img{height:40px;width:40px}
 .logo-txt{font-size:14px}
 .logo-txt em{display:none}
 .hd-tel span{display:none}
 .hd-tel a{font-size:17px}
}
/* ------------------------------------------------------------------
   手机端头部与导航：必须放在文件末尾。
   .menu-btn / .hd-tel 的基础样式在前文，媒体查询不增加特异性，
   平级规则按源码顺序后者胜出，所以覆盖规则必须写在它们之后。
   ------------------------------------------------------------------ */
@media(max-width:980px){
 /* 头部：去掉 400 电话，只保留 LOGO + 菜单按钮 */
 .hd-tel{display:none}
 .head-inner{gap:12px}

 /* 汉堡按钮：靠右、圆角色块，展开时反白高亮 */
 .menu-btn{
   display:block;flex-shrink:0;margin-left:auto;
   padding:6px 11px;font-size:24px;line-height:1;
   color:var(--o);background:var(--bg);
   border:none;border-radius:10px;cursor:pointer;
   -webkit-appearance:none;appearance:none;transition:.2s;
 }
 .menu-btn:hover,.menu-btn:focus{background:#ffe9df;color:var(--od)}
 .menu-btn[aria-expanded="true"]{background:var(--o);color:#fff}

 /* 导航面板：自头部下方滑出 */
 .nav{
   display:none;
   position:absolute;top:100%;left:0;right:0;
   background:#fff;border-top:1px solid var(--bd);
   border-radius:0 0 16px 16px;
   box-shadow:0 20px 44px rgba(31,35,40,.16);
   padding:6px 8px 14px;
   max-height:calc(100vh - 70px);
   overflow-y:auto;-webkit-overflow-scrolling:touch;
 }
 .nav.is-open{display:block;animation:navIn .22s ease both}
 @keyframes navIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}
 .nav-list{flex-direction:column;gap:0}

 /* 一级栏目：加大点击区，行间分隔 */
 .nav-item{border-bottom:1px solid #f7ece5}
 .nav-item:last-child{border-bottom:none}
 .nav-item>a{
   display:flex;align-items:center;justify-content:space-between;gap:0;
   padding:15px 12px;min-height:52px;
   font-size:16px;font-weight:600;white-space:normal;
   border-radius:0;transition:.18s;
 }
 .nav-item>a:active{background:var(--bg)}
 .nav-item.is-open>a{color:var(--o);background:var(--bg)}

 /* 展开箭头：圆形小按钮 */
 .caret{
   display:inline-flex;align-items:center;justify-content:center;
   width:26px;height:26px;flex-shrink:0;margin-left:10px;
   font-size:10px;line-height:1;opacity:1;color:var(--tx2);
   background:var(--bg);border-radius:50%;
   transition:transform .22s ease,background .2s,color .2s;
 }
 .nav-item.is-open>a .caret{transform:rotate(180deg);background:#fff;color:var(--o)}

 /* 二级菜单：默认收起，点箭头展开（手风琴，一次只开一组） */
 .submenu{
   display:none;
   position:static;opacity:1;visibility:visible;transform:none;
   min-width:0;box-shadow:none;border:none;border-radius:12px;
   background:var(--bg);margin:0 12px 12px;padding:6px;
 }
 .nav-item.is-open>.submenu{display:block;animation:subIn .2s ease both}
 @keyframes subIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
 .submenu li a{padding:12px;font-size:14.5px;white-space:normal;border-radius:9px}
 .submenu li a:active{background:#ffe4d8;color:var(--o)}
}