:root{
  --blue:#165DFF;
  --blue-dark:#0E4ACD;
  --text:#1F2A44;
  --muted:#6B7A99;
  --line:#E3ECFB;
  --bg:#F6F9FF;
  --gold:#E8B34F;
  --card:#ffffff;
  --shadow:0 10px 26px rgba(34,89,214,.07);
  --radius:18px;
  --container:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text);}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:min(var(--container),calc(100% - 32px));margin:0 auto}

.site-header{background:#fff;position:sticky;top:0;z-index:10;box-shadow:0 2px 18px rgba(26,73,176,.05)}
.site-header .inner{height:88px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-emblem{width:54px;height:54px;object-fit:contain;flex:0 0 54px}
.brand-text{min-width:0}
.brand-title{font-size:18px;line-height:1.18;font-weight:800;color:#1650C4;white-space:nowrap}
.brand-subtitle{margin-top:4px;font-size:12px;color:#6A7FA8;font-weight:600;white-space:nowrap}
.nav{display:flex;gap:6px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.nav a{padding:12px 14px;border-radius:10px;font-weight:600;font-size:15px;color:#334155;position:relative}
.nav a.active{color:var(--blue)}
.nav a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:6px;height:3px;border-radius:999px;background:var(--blue)}
.nav .cta{background:var(--blue-dark);color:#fff;padding:12px 18px;box-shadow:0 8px 16px rgba(17,86,219,.16)}

.hero-course{position:relative;overflow:hidden;background:linear-gradient(90deg,rgba(246,249,255,.62) 0%,rgba(246,249,255,.42) 24%,rgba(246,249,255,.12) 46%,rgba(246,249,255,0) 66%),url('../images/course-banner.png') center center/cover no-repeat,linear-gradient(90deg,#EDF5FF 0%,#E8F2FF 40%,#DCEBFF 100%)}
.hero-course .inner{position:relative;z-index:1;min-height:620px;display:flex;align-items:center}
.hero-copy{max-width:560px;padding:46px 0 54px}
.hero-copy h1{font-size:50px;line-height:1.14;margin:0 0 16px;color:#1047B4;font-weight:800;letter-spacing:.2px}
.hero-copy .subtitle{font-size:26px;font-weight:700;color:#4A6FBD;margin-bottom:14px}
.hero-copy p{font-size:17px;line-height:1.9;color:#4F628B;margin:0;max-width:520px}

.section{padding:20px 0}
.section-title{display:flex;align-items:center;justify-content:center;gap:14px;margin:4px 0 16px}
.section-title::before,.section-title::after{content:"";width:56px;height:2px;border-radius:999px;background:linear-gradient(90deg,rgba(232,179,79,.15),#E8B34F,rgba(232,179,79,.15))}
.section-title h2{margin:0;color:#2351BA;font-size:23px;line-height:1.2;letter-spacing:1px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.top-card{margin-top:-52px;position:relative;z-index:2;padding:22px 28px 24px}
.lead{font-size:15px;line-height:1.9;color:#2F4165;margin:0 0 12px;}
.feature-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:18px}
.feature-item{border:1px solid #DDE9FF;border-radius:12px;background:linear-gradient(180deg,#fff,#F8FBFF);padding:16px 12px;text-align:center}
.feature-item img{width:42px;height:42px;object-fit:contain;margin:0 auto 8px}
.feature-item h3{font-size:17px;color:#2462D7;margin:0 0 5px}
.feature-item p{font-size:13px;color:#5E7194;line-height:1.5;margin:0}

.stage-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.stage-card{padding:22px 20px;text-align:center}
.stage-card h3{margin:0 0 4px;color:#2462D7;font-size:19px;line-height:1.35}
.stage-card .range{color:#2462D7;font-weight:700;margin-bottom:12px}
.stage-card ul{list-style:none;margin:0;padding:0;text-align:left;padding-left:65px;}
.stage-card li{position:relative;padding-left:18px;margin:8px 0;color:#41577E;font-size:14px;line-height:1.45}
.stage-card li::before{content:"";position:absolute;left:0;top:.65em;width:6px;height:6px;border-radius:2px;background:#6EA4FF}

.course-section{padding:10px 0}
.course-card{padding:14px 18px 18px}
.course-head{display:flex;gap:16px;align-items:center;margin-bottom:10px}
.course-figure{width:72px;height:72px;object-fit:contain;flex:0 0 72px}
.course-title h3{margin:0 0 6px;color:#2360D6;font-size:22px;line-height:1.3}
.course-title p{margin:0;color:#6A7A99;font-size:13px;line-height:1.6}
.course-title b{color:#3A5684}

.course-table{width:100%;border-collapse:collapse;table-layout:fixed;border:1px solid #DDE9FF;border-radius:12px;overflow:hidden}
.course-table th{background:#F1F6FF;color:#2360D6;font-size:14px;text-align:left;padding:9px 12px;border:1px solid #DDE9FF}
.course-table td{background:#fff;color:#354867;font-size:13px;line-height:1.55;padding:8px 12px;border:1px solid #E6EEFB}
.course-table th:first-child,.course-table td:first-child{width:88px;text-align:center}
.course-table th:nth-child(2),.course-table td:nth-child(2){width:38%}

.require-card{padding:24px 26px}
.require-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.require-item{display:grid;grid-template-columns:52px 1fr;gap:14px;align-items:start;border-right:1px solid #E2EBFA;padding-right:18px}
.require-item:last-child{border-right:none}
.require-item img{width:46px;height:46px;object-fit:contain}
.require-item h3{font-size:18px;color:#2360D6;margin:0 0 6px}
.require-item p{font-size:13px;color:#536987;line-height:1.65;margin:0}

.site-footer{margin-top:26px;background:#0D4AB7;color:#D9E6FF}
.site-footer .inner{display:flex;flex-direction:column;align-items:center;text-align:center;gap:16px;padding:34px 0 28px}
.footer-col{min-width:0;width:100%}
.footer-brand{display:flex;flex-direction:column;align-items:center;gap:10px;min-width:0}
.footer-emblem{width:48px;height:48px;object-fit:contain;flex:0 0 48px}
.footer-brand .text{font-size:14px;line-height:1.6;color:#D9E6FF;max-width:820px}
.footer-brand .text strong{display:block;font-size:20px;line-height:1.25;margin-bottom:4px;color:#fff}
.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px 24px}
.footer-nav a{font-size:14px;color:#D9E6FF;opacity:.95;padding:2px 0}
.footer-nav a:hover{color:#fff}
.filing-info{font-size:13px;line-height:1.9;color:#D9E6FF;opacity:.92}

@media (max-width: 1100px){
  .feature-grid{grid-template-columns:repeat(3,1fr)}
  .stage-grid,.require-grid{grid-template-columns:repeat(2,1fr)}
  .require-item:nth-child(2){border-right:none}
  .hero-copy h1{font-size:42px}
}
@media (max-width: 820px){
  .site-header .inner{height:auto;padding:14px 0;align-items:flex-start;flex-direction:column}
  .brand-emblem{width:48px;height:48px;flex-basis:48px}
  .brand-title{font-size:16px;white-space:normal}
  .brand-subtitle{font-size:11px;white-space:normal}
  .nav{justify-content:flex-start}
  .hero-course .inner{min-height:540px}
  .hero-copy h1{font-size:34px}
  .hero-copy .subtitle{font-size:22px}
  .top-card{margin-top:-30px;padding:20px 18px}
  .feature-grid,.stage-grid,.require-grid{grid-template-columns:1fr}
  .require-item{border-right:none;border-bottom:1px solid #E2EBFA;padding:0 0 16px}
  .require-item:last-child{border-bottom:none}
  .course-head{align-items:flex-start}
  .course-title h3{font-size:19px}
  .course-table{table-layout:auto}
  .course-table th,.course-table td{font-size:12px;padding:7px 8px}
  .course-table th:first-child,.course-table td:first-child{width:64px}
  .site-footer .inner{gap:14px;padding:28px 0 22px}
  .footer-brand .text strong{font-size:18px}
}
@media (max-width: 560px){
  .container{width:min(var(--container),calc(100% - 24px))}
  .hero-copy h1{font-size:30px}
  .course-figure{width:58px;height:58px;flex-basis:58px}
  .footer-nav{gap:6px 18px}
}