*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#1e293b;background:#fff;line-height:1.6;overflow-x:hidden}
a{color:inherit;text-decoration:none}

:root{
  --blue:#0066FF;
  --blue-dark:#0044CC;
  --blue-light:#E8F0FF;
  --blue-bg:#0A1628;
  --dark:#0A1628;
  --text:#1E293B;
  --text-light:#64748B;
  --bg-light:#F8FAFF;
  --radius:16px;
  --shadow:0 4px 24px rgba(0,102,255,0.08);
  --shadow-hover:0 8px 40px rgba(0,102,255,0.15);
}

nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:0.75rem 2rem;display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,0.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(0,102,255,0.08)}
.nav-logo{font-weight:700;font-size:1.1rem;color:var(--dark)}
.nav-logo span{color:var(--blue)}
.nav-back{font-size:0.9rem;color:var(--text-light);transition:color 0.2s}
.nav-back:hover{color:var(--blue)}

.hero{min-height:50vh;display:flex;align-items:center;justify-content:center;position:relative;background:linear-gradient(135deg,var(--blue-bg) 0%,#0F2140 50%,#13274A 100%);overflow:hidden;padding:6rem 2rem 3rem}
.hero-content{text-align:center;position:relative;z-index:2;max-width:800px}
.hero h1{color:#fff;margin-bottom:1rem;font-size:clamp(2rem,5vw,3rem)}
.hero p{color:rgba(255,255,255,0.7);font-size:clamp(1rem,2vw,1.2rem);max-width:600px;margin:0 auto}

.article{max-width:800px;margin:0 auto;padding:4rem 2rem}
.case-toc{position:static;display:block;max-width:800px;margin:0 auto;padding:2rem 2rem 0;background:none;border-bottom:0;backdrop-filter:none;-webkit-backdrop-filter:none}
.case-toc ul{display:flex;gap:0.75rem;flex-wrap:wrap;list-style:none;padding:1rem;border:1px solid rgba(0,102,255,0.1);border-radius:var(--radius);background:var(--bg-light)}
.case-toc a{display:block;padding:0.4rem 0.75rem;border-radius:999px;background:#fff;color:var(--text-light);font-size:0.9rem;transition:all 0.2s}
.case-toc a:hover{background:var(--blue);color:#fff}
.article h2{font-size:1.8rem;margin:3rem 0 1.5rem;color:var(--dark);scroll-margin-top:80px}
.article h3{font-size:1.25rem;margin:2rem 0 1rem;color:var(--dark)}
.article p{color:var(--text-light);margin-bottom:1.25rem;line-height:1.8}
.article ul{list-style:none;padding:0;margin-bottom:1.5rem}
.article ul li{position:relative;padding:0.4rem 0 0.4rem 1.5rem;color:var(--text-light)}
.article ul li::before{content:'→';position:absolute;left:0;color:var(--blue)}
.article ol{padding-left:1.5rem;margin-bottom:1.5rem;color:var(--text-light)}
.article ol li{padding:0.3rem 0}
.article strong{color:var(--text)}

.phase-card{background:var(--bg-light);border-radius:var(--radius);padding:2rem;margin:1.5rem 0;border-left:4px solid var(--blue)}
.phase-card h4{font-size:1.1rem;margin-bottom:0.75rem;color:var(--dark)}
.phase-card p{margin-bottom:0.75rem}

table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:0.9rem}
th,td{padding:0.75rem 1rem;text-align:left;border-bottom:1px solid rgba(0,102,255,0.1)}
th{background:var(--bg-light);font-weight:600;color:var(--dark)}
td{color:var(--text-light)}

.warning{background:#FFF8E1;border-radius:var(--radius);padding:1.5rem;margin:1.5rem 0;border-left:4px solid #FFB300;scroll-margin-top:80px}
.warning p{margin-bottom:0;color:#5D4037}

@media (max-width:640px){
  nav{padding:0.7rem 1rem}
  .nav-logo{font-size:1rem}
  .nav-back{font-size:0.85rem}
  .hero{min-height:auto;padding:5rem 1.25rem 2.5rem}
  .hero h1{font-size:clamp(1.8rem,8vw,2.4rem)}
  .article{padding:2rem 1.5rem}
  .case-toc{padding:1.5rem 1.25rem 0}
  .case-toc ul{gap:0.5rem;padding:0.75rem}
  .case-toc li{flex:1 1 calc(50% - 0.5rem)}
  .case-toc a{text-align:center;font-size:0.82rem;padding:0.45rem 0.5rem}
  .article h2{font-size:1.45rem;margin:2.25rem 0 1rem}
  .phase-card{padding:1.5rem}
  table,tbody,tr,td{display:block;width:100%}
  table{font-size:0.88rem}
  table tr:first-child{display:none}
  table tr{margin-bottom:0.85rem;padding:0.9rem;border:1px solid rgba(0,102,255,0.1);border-radius:12px;background:#fff;box-shadow:var(--shadow)}
  table td{display:flex;justify-content:space-between;gap:1rem;padding:0.45rem 0;border-bottom:1px solid rgba(0,102,255,0.08);white-space:normal}
  table td:last-child{border-bottom:0}
  table td::before{content:attr(data-label);flex:0 0 6.5rem;color:var(--text);font-weight:600}
}