:root{--blue:#1a6dff;--dark:#0b1f3a;--gray:#5b6b82;--bg:#f5f8ff;--line:#e3eaf6}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--dark);line-height:1.7;background:#fff}
a{color:var(--blue);text-decoration:none}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
/* header */
header{position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:99}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--dark)}
.logo svg{height:34px}
.nav ul{display:flex;gap:26px;list-style:none}
.nav ul a{color:var(--dark);font-size:15px;font-weight:500}
.nav ul a:hover,.nav ul a.active{color:var(--blue)}
.nav .cta{background:var(--blue);color:#fff;padding:9px 20px;border-radius:8px;font-size:14px;font-weight:600}
/* hero */
.hero{background:linear-gradient(135deg,#0b2a5b 0%,#1447a8 55%,#1a6dff 100%);color:#fff;padding:90px 0 80px}
.hero h1{font-size:40px;line-height:1.3;margin-bottom:18px}
.hero p{font-size:18px;opacity:.9;max-width:720px;margin-bottom:32px}
.btn{display:inline-block;padding:13px 30px;border-radius:10px;font-weight:600;font-size:16px}
.btn-primary{background:#fff;color:var(--blue)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff;margin-left:14px}
.hero .tags{margin-top:36px;display:flex;flex-wrap:wrap;gap:10px}
.hero .tags span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);padding:6px 14px;border-radius:999px;font-size:13px}
/* sections */
section{padding:70px 0}
.sec-title{text-align:center;margin-bottom:14px;font-size:30px}
.sec-sub{text-align:center;color:var(--gray);margin-bottom:48px}
.grid{display:grid;gap:24px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:28px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--gray);font-size:14.5px}
.card .ic{font-size:30px;margin-bottom:12px}
.num{font-size:34px;font-weight:800;color:var(--blue)}
.num small{font-size:15px;color:var(--gray);font-weight:400;display:block}
/* steps */
.step{display:flex;gap:16px;margin-bottom:20px}
.step .n{flex:0 0 34px;height:34px;background:var(--blue);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}
/* table */
table{width:100%;border-collapse:collapse;font-size:14.5px}
th,td{border:1px solid var(--line);padding:12px 14px;text-align:left}
th{background:var(--bg)}
/* faq */
details{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin-bottom:12px}
summary{font-weight:600;cursor:pointer}
details p{margin-top:10px;color:var(--gray);font-size:14.5px}
/* form */
.form-wrap{background:var(--bg);border:1px solid var(--line);border-radius:16px;padding:34px}
form label{display:block;font-size:14px;font-weight:600;margin:14px 0 6px}
form input,form textarea,form select{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:8px;font-size:15px;font-family:inherit}
form button{margin-top:20px;width:100%;background:var(--blue);color:#fff;border:none;padding:14px;border-radius:10px;font-size:16px;font-weight:600;cursor:pointer}
/* contact bar */
.contact-bar{background:var(--dark);color:#fff;padding:44px 0}
.contact-bar .grid{align-items:center}
.contact-bar a{color:#fff;font-weight:700;font-size:22px}
/* footer */
footer{background:#081527;color:#93a5bd;padding:44px 0;font-size:14px}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:34px;margin-bottom:26px}
footer h4{color:#fff;margin-bottom:12px}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer a{color:#93a5bd}
.copy{border-top:1px solid #1d3050;padding-top:20px;text-align:center}
@media(max-width:900px){.g3,.g4,.g2{grid-template-columns:1fr}.nav ul{display:none}.hero h1{font-size:29px}}

/* ===== 修复：所有文字显式设色，防止与背景重合 ===== */
section{color:#0b1f3a}
.card{color:#0b1f3a}
.card h3{color:#0b1f3a}
.card h3 a{color:#1a6dff}
.card p{color:#5b6b82}
.step b,.step div{color:#0b1f3a}
.step span{color:#5b6b82 !important}
table{color:#0b1f3a}
th{color:#0b1f3a}
td{color:#0b1f3a}
.sec-title{color:#0b1f3a}
.sec-sub{color:#5b6b82}
.num{color:#1a6dff}
.num small{color:#5b6b82}
summary{color:#0b1f3a}
details p{color:#5b6b82}
.hero,.contact-bar{color:#ffffff}
.hero p,.contact-bar p{color:#e8eefb}
.contact-bar a{color:#ffffff}

/* ===== 强力修复：锁定背景与文字颜色，防止外部样式覆盖 ===== */
section{background:#ffffff !important;color:#0b1f3a !important}
section *,td,th,summary{color:#0b1f3a !important}
.card p,.sec-sub,.num small,.step span,details p{color:#5b6b82 !important}
.card h3 a,.num{color:#1a6dff !important}
.hero{background:linear-gradient(135deg,#0b2a5b 0%,#1447a8 55%,#1a6dff 100%) !important}
.hero,.hero *{color:#ffffff !important}
.hero .btn-primary{color:#1a6dff !important}
.contact-bar{background:#0b1f3a !important}
.contact-bar,.contact-bar *{color:#ffffff !important}
.contact-bar .btn-primary{color:#1a6dff !important}
footer{background:#081527 !important}
footer,footer *{color:#93a5bd !important}
footer h4{color:#ffffff !important}
footer .logo{filter:brightness(2)}

/* ===== 最终：正文文字统一黑色 ===== */
section,section *{color:#000 !important}
td,th,summary{color:#000 !important}
.num{color:#000 !important}
.card p,.sec-sub,.num small,.step span,details p{color:#444444 !important}
.card h3 a{color:#1a6dff !important}

/* ===== 最终主题：区块深色背景 + 白字 ===== */
section{background:#0e2038 !important;color:#ffffff !important}
section *{color:#ffffff !important}
.card,details,th,td{background:#152a4a !important}
.card,td,th,details{border-color:#24406b !important}
.card h3 a,.num{color:#5ea0ff !important}
.card p,.sec-sub,.num small,.step span,details p{color:#b9c8e2 !important}
.form-wrap{background:#152a4a !important;border-color:#24406b !important}
.form-wrap h2,.form-wrap p,label{color:#ffffff !important}
input,textarea,select{background:#ffffff !important;color:#000000 !important}