*,*::before,*::after{box-sizing:border-box}
:root{
  --red:#B01F24;--red-dark:#8C171B;--red-soft:#F7E9EA;
  --green:#1F3A34;--green-light:#2C4F46;
  --cream:#FAF7F2;--white:#FFFFFF;
  --ink:#1C1F1E;--ink2:#4A5250;--ink3:#7C8785;
  --line:#E5E0D8;--amber:#B8862B;
  --max:1180px;--radius:10px;
  --shadow:0 2px 14px rgba(31,58,52,.07);
  --shadow-lg:0 10px 40px rgba(31,58,52,.12);
  --font:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--white);
  font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.35;color:var(--ink)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.hide{display:none!important}
/* 「跳到主要内容」的落点：需避开 sticky 页头，否则跳转后标题被页头遮住 */
#main{scroll-margin-top:96px}

/* ---------- 顶部条 ---------- */
.topbar{background:var(--green);color:rgba(255,255,255,.82);font-size:12.5px}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:38px;gap:16px}
.topbar a{color:rgba(255,255,255,.82);transition:.2s}
.topbar a:hover{color:#fff}
.topbar .tl{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.topbar .tr{display:flex;gap:16px;align-items:center}
.topbar .tel{color:#fff;font-weight:700;letter-spacing:.3px}
.topbar .dot{width:1px;height:12px;background:rgba(255,255,255,.22)}

/* ---------- 页头 ---------- */
.header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.97);
  backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}
.header .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.logo img{height:38px;width:auto}
.nav{display:flex;align-items:center;gap:2px}
.nav>li{position:relative}
.nav>li>a{display:block;padding:0 15px;line-height:70px;font-size:15px;font-weight:600;
  color:var(--ink2);transition:.2s;white-space:nowrap}
.nav>li>a:hover,.nav>li.on>a{color:var(--red)}
.nav>li.on>a::after{content:"";position:absolute;left:15px;right:15px;bottom:0;height:2px;background:var(--red)}
.mega{position:absolute;left:50%;top:100%;transform:translateX(-50%) translateY(6px);
  min-width:460px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-lg);padding:20px;opacity:0;visibility:hidden;transition:.2s}
.nav>li:hover .mega{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.mega h5{font-size:11.5px;letter-spacing:1.6px;color:var(--ink3);font-weight:700;
  margin-bottom:14px;text-transform:uppercase}
.mega .cols{display:grid;grid-template-columns:1fr 1fr;gap:4px 18px}
.mega .cols a{display:block;padding:9px 10px;border-radius:7px;transition:.18s}
.mega .cols a:hover{background:var(--cream)}
.mega .cols b{display:block;font-size:14px;font-weight:700;color:var(--ink)}
.mega .cols small{display:block;font-size:12px;color:var(--ink3);margin-top:2px;line-height:1.5}
.mega .cols a:hover b{color:var(--red)}
.hd-cta{display:flex;align-items:center;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:11px 22px;border-radius:7px;font-size:14.5px;font-weight:700;
  cursor:pointer;border:1px solid transparent;transition:.2s;white-space:nowrap}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark);transform:translateY(-1px);box-shadow:0 6px 18px rgba(176,31,36,.26)}
.btn-ghost{border-color:var(--line);color:var(--ink2);background:#fff}
.btn-ghost:hover{border-color:var(--red);color:var(--red)}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{background:var(--green-light)}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-sm{padding:8px 16px;font-size:13.5px}
.burger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:8px;
  background:#fff;align-items:center;justify-content:center;cursor:pointer;font-size:18px}

/* ---------- 区块 ---------- */
section{padding:76px 0}
.sec-cream{background:var(--cream)}
.sec-green{background:var(--green);color:#fff}
.sec-green h2,.sec-green h3{color:#fff}
.sec-green .sh-p{color:rgba(255,255,255,.72)}
.sh{margin-bottom:38px;max-width:100%}
.sh-c{text-align:center;margin-left:auto;margin-right:auto}
.sh .kicker{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1.8px;
  color:var(--red);background:var(--red-soft);padding:5px 12px;border-radius:20px;margin-bottom:14px}
.sec-green .sh .kicker{background:rgba(255,255,255,.14);color:#fff}
.sh h2{font-size:31px;letter-spacing:-.3px}
.sh h2 em{font-style:normal;color:var(--red)}
.sec-green .sh h2 em{color:#F0B9A8}
.sh-p{margin-top:12px;font-size:15.5px;color:var(--ink2);line-height:1.8}

/* ---------- 首页 Hero ---------- */
.hero{background:linear-gradient(168deg,var(--cream) 0%,#F4EFE7 58%,#EFE9DF 100%);
  padding:80px 0 64px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-180px;top:-120px;width:520px;height:520px;
  border-radius:50%;background:radial-gradient(circle,rgba(176,31,36,.09),transparent 68%)}
.hero .wrap{position:relative;z-index:2}
.hero .badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:30px;padding:7px 16px;font-size:13px;font-weight:600;color:var(--ink2);margin-bottom:20px}
.hero .badge i{width:6px;height:6px;border-radius:50%;background:var(--red);display:inline-block}
.hero h1{font-size:44px;letter-spacing:-1px;max-width:none}
.hero h1 em{font-style:normal;color:var(--red)}
.hero .lead{margin-top:18px;font-size:17px;color:var(--ink2);max-width:none;line-height:1.85}
.hero .acts{margin-top:30px;display:flex;gap:12px;flex-wrap:wrap}
.hero .metrics{margin-top:52px;display:grid;grid-template-columns:repeat(6,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.hero .metrics div{background:#fff;padding:20px 12px;text-align:center}
.hero .metrics b{display:block;font-size:27px;color:var(--red);font-weight:800;letter-spacing:-.5px}
.hero .metrics b span{font-size:15px;margin-left:1px}
.hero .metrics small{display:block;font-size:12.5px;color:var(--ink3);margin-top:4px}

/* ---------- 客群分流 ---------- */
.entry{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.entry a{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 22px;transition:.25s;display:block}
.entry a:hover{border-color:var(--red);transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.entry .ic{width:46px;height:46px;border-radius:10px;background:var(--green);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:700;margin-bottom:14px}
.entry a:hover .ic{background:var(--red)}
.entry b{display:block;font-size:16.5px;margin-bottom:6px}
.entry small{color:var(--ink3);font-size:13px;line-height:1.6}

/* ---------- 通用卡片网格 ---------- */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;transition:.25s}
.card:hover{border-color:rgba(176,31,36,.35);box-shadow:var(--shadow)}
.card .num{font-size:12.5px;font-weight:800;letter-spacing:1.2px;color:var(--red)}
.card .ic{width:44px;height:44px;border-radius:9px;background:var(--red-soft);color:var(--red);
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:800;margin-bottom:14px}
.card h3{font-size:17.5px;margin-bottom:6px}
.card .en{font-size:11.5px;letter-spacing:1px;color:var(--ink3);text-transform:uppercase;margin-bottom:10px}
.card p{color:var(--ink2);font-size:14px;line-height:1.8}
.card ul{margin-top:14px;display:grid;gap:8px}
.card ul li{font-size:13.5px;color:var(--ink2);padding-left:17px;position:relative;line-height:1.7}
.card ul li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;
  border-radius:50%;background:var(--red)}
.card .tag{display:inline-block;font-size:12px;color:var(--green);background:rgba(31,58,52,.07);
  padding:3px 10px;border-radius:5px;margin-top:14px;font-weight:600}

/* ---------- 三锚点条 ---------- */
.anchors{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.anchor{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius);padding:28px 24px}
.anchor .no{font-size:12.5px;font-weight:800;letter-spacing:1.4px;color:rgba(255,255,255,.5)}
.anchor h3{font-size:18px;margin:12px 0 10px}
.anchor p{color:rgba(255,255,255,.76);font-size:14px;line-height:1.8}
.anchor a{display:inline-block;margin-top:16px;font-size:13.5px;font-weight:700;color:#F0B9A8}
.anchor a:hover{color:#fff}

/* ---------- 案例筛选 ---------- */
.filters{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:26px}
.filters button{padding:8px 18px;border-radius:20px;border:1px solid var(--line);background:#fff;
  cursor:pointer;font-size:13.5px;font-weight:600;color:var(--ink2);transition:.2s}
.filters button:hover{border-color:var(--red);color:var(--red)}
.filters button.on{background:var(--red);border-color:var(--red);color:#fff}
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.25s}
.case:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:rgba(176,31,36,.3)}
.case .grp{font-size:12px;font-weight:700;color:var(--red);letter-spacing:.6px}
.case h3{font-size:17px;margin:10px 0 4px}
.case .sub{font-size:13.5px;color:var(--green);font-weight:700;margin-bottom:10px}
.case p{font-size:13.5px;color:var(--ink2);line-height:1.78}
.case .foot{display:flex;justify-content:space-between;align-items:center;margin-top:16px;
  padding-top:14px;border-top:1px dashed var(--line);gap:10px;flex-wrap:wrap}
.case .chips{display:flex;gap:6px;flex-wrap:wrap}
.case .chips span{font-size:11.5px;background:var(--cream);color:var(--ink2);padding:3px 9px;border-radius:4px}
.case .out{font-size:12.5px;font-weight:700;color:var(--red)}

/* ---------- 新闻 ---------- */
.feature{background:linear-gradient(120deg,var(--green),#2A4B43);color:#fff;border-radius:12px;
  padding:34px 36px;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;
  position:relative;overflow:hidden}
.feature::after{content:"AD";position:absolute;right:26px;top:18px;font-size:11px;letter-spacing:2px;
  color:rgba(255,255,255,.35);border:1px dashed rgba(255,255,255,.3);padding:3px 9px;border-radius:4px}
.feature .k{font-size:12px;letter-spacing:2px;color:rgba(255,255,255,.6);font-weight:700}
.feature h3{font-size:23px;margin:12px 0 10px;line-height:1.45;max-width:720px}
.feature p{color:rgba(255,255,255,.78);font-size:14px;line-height:1.8;max-width:720px}
.feature .dl{margin-top:14px;display:inline-block;background:rgba(240,185,168,.15);
  border:1px solid rgba(240,185,168,.4);color:#F5CFC0;font-size:12.5px;font-weight:700;
  padding:5px 12px;border-radius:5px}
.news{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;
  display:flex;flex-direction:column;transition:.25s}
.news:hover{border-color:rgba(176,31,36,.3);box-shadow:var(--shadow);transform:translateY(-3px)}
.news .meta{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.news .lab{font-size:11.5px;font-weight:700;padding:3px 9px;border-radius:4px}
.lab-notice{background:var(--red-soft);color:var(--red)}
.lab-course{background:rgba(31,58,52,.08);color:var(--green)}
.lab-company{background:rgba(184,134,43,.12);color:var(--amber)}
.news time{font-size:12px;color:var(--ink3)}
.news h4{font-size:15.5px;line-height:1.55;margin-bottom:9px}
.news:hover h4{color:var(--red)}
.news p{font-size:13px;color:var(--ink2);line-height:1.75;flex:1}
.news .more{margin-top:14px;font-size:13px;font-weight:700;color:var(--red)}

/* ---------- 研究院 Tab ---------- */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:26px;border-bottom:1px solid var(--line);padding-bottom:0}
.tabs button{background:none;border:0;padding:12px 18px;cursor:pointer;font-size:14.5px;font-weight:700;
  color:var(--ink3);border-bottom:2px solid transparent;margin-bottom:-1px;transition:.2s}
.tabs button:hover{color:var(--ink2)}
.tabs button.on{color:var(--red);border-bottom-color:var(--red)}
.ins{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  display:flex;flex-direction:column}
.ins .tg{font-size:11.5px;font-weight:700;color:var(--red);letter-spacing:.5px;margin-bottom:10px}
.ins h4{font-size:16px;line-height:1.55;margin-bottom:9px}
.ins p{font-size:13.5px;color:var(--ink2);line-height:1.78;flex:1}
.ins .cta{margin-top:16px;font-size:13px;font-weight:700;color:var(--red)}
.ins .cta.lock::after{content:" 🔒";font-size:11px}

/* ---------- 产品族 ---------- */
.fam{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.25s}
.fam:hover{border-color:rgba(176,31,36,.35);box-shadow:var(--shadow);transform:translateY(-3px)}
.fam .hd{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.fam .ic{width:40px;height:40px;border-radius:9px;background:var(--red-soft);color:var(--red);
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;flex:0 0 auto}
.fam h3{font-size:16px}
.fam .sub{font-size:12px;color:var(--ink3);margin-top:3px}
.fam p{font-size:13.5px;color:var(--ink2);line-height:1.78}

/* ---------- 数据表 ---------- */
.tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;font-size:13.5px}
.tbl th{background:var(--green);color:#fff;font-weight:700;padding:13px 14px;text-align:left;font-size:13px}
.tbl td{padding:13px 14px;border-top:1px solid var(--line);color:var(--ink2);vertical-align:top;line-height:1.7}
.tbl tr:nth-child(even) td{background:#FCFBF9}
.tbl td:first-child{color:var(--ink);font-weight:700;white-space:nowrap}
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ---------- 表单 ---------- */
.form{background:#fff;border:1px solid var(--line);border-radius:12px;padding:32px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:700;color:var(--ink)}
.field label i{color:var(--red);font-style:normal;margin-left:2px}
.field input,.field select,.field textarea{padding:12px 14px;border:1px solid var(--line);
  border-radius:7px;background:#FCFBF9;transition:.2s;width:100%}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--red);
  background:#fff;box-shadow:0 0 0 3px rgba(176,31,36,.08)}
.field textarea{min-height:96px;resize:vertical}
.field .err{font-size:12px;color:var(--red);display:none}
.field.bad input,.field.bad select,.field.bad textarea{border-color:var(--red);background:#FEF7F7}
.field.bad .err{display:block}
.consent{display:flex;gap:9px;align-items:flex-start;font-size:12.5px;color:var(--ink2);
  margin:6px 0 18px;line-height:1.7}
.consent input{margin-top:3px;flex:0 0 auto;width:15px;height:15px;accent-color:var(--red)}
.form-msg{margin-top:14px;font-size:13.5px;padding:12px 15px;border-radius:7px;display:none}
.form-msg.ok{display:block;background:#EFF6F1;color:#1F5C3A;border:1px solid #CFE4D6}
.form-msg.no{display:block;background:#FDF0F0;color:var(--red);border:1px solid #F3D3D4}

/* ---------- 侧栏小卡 ---------- */
.side{background:var(--cream);border:1px solid var(--line);border-radius:12px;padding:26px}
.side h4{font-size:16px;margin-bottom:14px}
.side .row{display:flex;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:13.5px}
.side .row:last-child{border-bottom:0}
.side .row b{color:var(--ink3);font-weight:600;flex:0 0 62px}
.side .row span{color:var(--ink);font-weight:700;word-break:break-all}
.side .row a{color:var(--red);font-weight:700}

/* ---------- 二维码卡 ---------- */
.qr{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;text-align:center}
.qr .box{width:190px;height:190px;margin:0 auto 14px;border:1px dashed var(--line);border-radius:10px;
  display:flex;align-items:center;justify-content:center;background:var(--cream);overflow:hidden}
.qr .box img{width:100%;height:100%;object-fit:contain}
.qr .box .ph{font-size:12px;color:var(--ink3);line-height:1.7;padding:0 16px}
.qr b{display:block;font-size:15px;margin-bottom:4px}
.qr small{color:var(--ink3);font-size:12.5px}

/* ---------- 步骤条 ---------- */
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}
.step{background:#fff;border:1px solid var(--line);border-radius:9px;padding:16px 12px;text-align:center}
.step .n{width:28px;height:28px;border-radius:50%;background:var(--green);color:#fff;font-size:13px;
  font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 9px}
.step b{font-size:13.5px;display:block}

/* ---------- 面包屑 / 页头 ---------- */
.crumb{font-size:12.5px;color:var(--ink3);padding:18px 0 0}
.crumb a:hover{color:var(--red)}
.page-hd{background:var(--cream);padding:52px 0 46px;border-bottom:1px solid var(--line)}
.page-hd h1{font-size:34px;letter-spacing:-.5px}
.page-hd p{margin-top:14px;font-size:16px;color:var(--ink2);max-width:none;line-height:1.8}
.page-hd .kicker{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1.8px;
  color:var(--red);background:#fff;padding:5px 12px;border-radius:20px;margin-bottom:14px}

/* ---------- 页脚 ---------- */
.footer{background:var(--green);color:rgba(255,255,255,.7);padding:56px 0 0;font-size:13.5px}
.footer .top{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:32px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer .brand img{height:36px;width:auto;margin-bottom:16px}
.footer .brand p{line-height:1.85;color:rgba(255,255,255,.6);font-size:13px;max-width:290px}
.footer .brand .tel{margin-top:16px;font-size:20px;font-weight:800;color:#fff;letter-spacing:.5px}
.footer .brand .tel small{display:block;font-size:11.5px;font-weight:400;color:rgba(255,255,255,.5);
  letter-spacing:0;margin-top:2px}
.footer h5{color:#fff;font-size:14px;margin-bottom:16px;font-weight:700}
.footer ul{display:grid;gap:10px}
.footer ul a:hover{color:#fff}
.footer .bot{display:flex;justify-content:space-between;align-items:center;gap:18px;
  padding:22px 0 26px;flex-wrap:wrap;font-size:12.5px;color:rgba(255,255,255,.5)}
.footer .bot a:hover{color:#fff}
.footer .bot .links{display:flex;gap:16px;flex-wrap:wrap}

/* ---------- 浮动联系 ---------- */
.float{position:fixed;right:20px;bottom:26px;z-index:70;display:flex;flex-direction:column;gap:10px}
.float a{width:52px;height:52px;border-radius:50%;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-lg);display:flex;align-items:center;justify-content:center;
  font-size:20px;transition:.2s;cursor:pointer}
.float a:hover{background:var(--red);color:#fff;border-color:var(--red);transform:translateY(-2px)}

/* ---------- 空状态 / 骨架 ---------- */
.empty{text-align:center;padding:56px 20px;color:var(--ink3);border:1px dashed var(--line);border-radius:12px}
.skel{background:linear-gradient(90deg,#F2EEE8 25%,#FAF7F2 50%,#F2EEE8 75%);
  background-size:200% 100%;animation:sk 1.4s infinite;border-radius:6px;height:14px;margin:9px 0}
@keyframes sk{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* ---------- 法务页排版 ---------- */
.legal{max-width:840px;margin:0 auto}
.legal h2{font-size:23px;margin:38px 0 14px;padding-bottom:10px;border-bottom:2px solid var(--red)}
.legal h3{font-size:17px;margin:26px 0 10px}
.legal p{color:var(--ink2);line-height:1.95;margin-bottom:13px;font-size:14.5px}
.legal ul{display:grid;gap:9px;margin:12px 0 18px}
.legal ul li{color:var(--ink2);font-size:14.5px;padding-left:18px;position:relative;line-height:1.85}
.legal ul li::before{content:"";position:absolute;left:2px;top:11px;width:5px;height:5px;
  border-radius:50%;background:var(--red)}
.legal .meta{background:var(--cream);border-left:3px solid var(--red);padding:16px 20px;
  border-radius:0 8px 8px 0;font-size:13.5px;color:var(--ink2);line-height:1.8;margin-bottom:10px}

/* ---------- 工具类 ---------- */
.mt-s{margin-top:14px}.mt-m{margin-top:26px}.mt-l{margin-top:40px}
.center{text-align:center}
.note{font-size:12.5px;color:var(--ink3);line-height:1.75}
.divider{height:1px;background:var(--line);margin:34px 0}

/* ---------- 可见问答（与 FAQPage 结构化数据一一对应） ---------- */
.qa-list{max-width:860px;margin:0 auto}
.qa{border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:10px;overflow:hidden}
.qa[open]{border-color:rgba(176,31,36,.28);box-shadow:0 2px 14px rgba(31,58,52,.05)}
.qa summary{padding:15px 20px;font-weight:700;font-size:15px;color:var(--ink);cursor:pointer;
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";color:var(--red);font-size:19px;font-weight:700;line-height:1;flex:0 0 auto}
.qa[open] summary::after{content:"\2212"}
.qa .a{padding:0 20px 18px;color:var(--ink2);font-size:14px;line-height:1.85}

/* ---------- 响应式 ---------- */
@media(max-width:1080px){
  .hero h1{font-size:36px}
  .hero .metrics{grid-template-columns:repeat(3,1fr)}
  .g4{grid-template-columns:repeat(2,1fr)}
  .entry{grid-template-columns:repeat(2,1fr)}
  .footer .top{grid-template-columns:1fr 1fr 1fr}
  .nav>li>a{padding:0 10px;font-size:14px}
  .steps{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:820px){
  section{padding:52px 0}
  .burger{display:flex}
  .nav{position:fixed;left:0;right:0;top:108px;bottom:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:14px 20px 40px;overflow-y:auto;display:none;gap:0}
  .nav.open{display:flex}
  .nav>li>a{line-height:52px;padding:0;border-bottom:1px solid var(--line);font-size:16px}
  .mega{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;
    border:0;border-bottom:1px solid var(--line);min-width:0;padding:8px 0 14px;background:var(--cream);
    border-radius:8px;margin-bottom:8px}
  .nav>li:hover .mega{transform:none}
  .hd-cta .btn{display:none}
  .topbar .tl a:nth-child(n+3){display:none}
  .hero{padding:52px 0 46px}
  .hero h1{font-size:29px}
  .hero .metrics{grid-template-columns:repeat(2,1fr)}
  .g2,.g3,.g4,.entry,.anchors,.form-row{grid-template-columns:1fr}
  .footer .top{grid-template-columns:1fr 1fr}
  .feature{padding:26px 22px;grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .page-hd h1{font-size:26px}
  .sh h2{font-size:24px}
  .form{padding:22px}
  .float{right:12px;bottom:16px}
  .float a{width:46px;height:46px;font-size:18px}
}
@media print{.header,.topbar,.float,.footer{display:none}}