/* Refined, clean style with better rhythm and contrast */
:root{
  --brand:#1F4D8F;      /* 深蓝 主色 */
  --brand-2:#21A675;    /* 辅助色 */
  --accent:#FFB020;     /* 强调色 */
  --bg:#F7F9FC;         /* 背景色更柔和 */
  --surface:#FFFFFF;    /* 卡片/导航底色 */
  --ink:#0F172A;        /* 主文字 */
  --ink-2:#334155;      /* 次文字 */
  --muted:#64748B;      /* 弱化文字 */
  --border:#E2E8F0;     /* 边框 */
  --shadow: 0 6px 24px rgba(31,77,143,.08), 0 2px 8px rgba(17,24,39,.06);
  --radius:12px;
}

*{box-sizing:border-box}
html{font-size:16px}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans SC,Noto Sans JP,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
}

a{color:var(--brand);text-decoration:none}
a:hover{color:#153865;text-decoration:underline}

.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Mobile container adjustments */
@media(max-width:768px){
  .container{padding:0 20px}
}
@media(max-width:480px){
  .container{padding:0 16px}
}

/* Header */
header{position:sticky;top:0;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(6px);border-bottom:1px solid var(--border);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.nav .brand{font-weight:800;color:var(--brand);letter-spacing:.2px;text-decoration:none}
.nav .brand:hover{text-decoration:none;opacity:0.9}

/* Mobile brand adjustments */
@media(max-width:480px){
  .nav .brand{font-size:0.9rem;max-width:60%;margin-left:4px}
  .nav .brand .brand-full{display:none}
}
.nav ul{list-style:none;display:flex;gap:14px;margin:0;padding:0;align-items:center}
.nav a{padding:8px 10px;border-radius:10px;color:var(--ink-2);-webkit-tap-highlight-color:transparent}
.nav a:hover{background:#f1f5f9;color:var(--ink)}
.nav a:visited{color:var(--ink-2);}
.nav a:focus{outline:none}
.nav a:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px;border-radius:12px}
.nav a.active{color:var(--brand);background:#eef2ff}

/* Lang switcher */
.lang{position:relative}
.lang-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 10px;border-radius:10px;border:1px solid var(--border);background:#fff;color:var(--ink-2);cursor:pointer}
.lang-menu{position:absolute;right:0;top:42px;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow);display:none;min-width:140px;z-index:20}
.lang.open .lang-menu{display:block}
.lang-menu a{display:block;padding:8px 12px;color:var(--ink-2)}
.lang-menu a:hover{background:#f1f5f9;color:var(--ink)}

/* Mobile nav (hamburger) */
.nav-toggle{display:none;background:transparent;border:1px solid var(--border);padding:0;border-radius:8px;position:relative;width:36px;height:36px;cursor:pointer;transition:all .2s ease;z-index:101}
.nav-toggle:hover{background:var(--bg);border-color:var(--brand-2)}
.nav-toggle:focus-visible{outline:2px solid var(--brand-2);outline-offset:2px}
.nav-toggle:active{background:var(--bg);transform:scale(0.95)}
.nav-toggle .bar{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:all .3s ease;position:absolute;left:50%;transform:translateX(-50%)}
.nav-toggle .bar:nth-child(1){top:10px}
.nav-toggle .bar:nth-child(2){top:50%;transform:translateX(-50%) translateY(-50%)}
.nav-toggle .bar:nth-child(3){bottom:10px}
.nav-toggle[aria-expanded="true"] .bar:nth-child(1){transform:translateX(-50%) rotate(45deg);top:50%;margin-top:-1px}
.nav-toggle[aria-expanded="true"] .bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .bar:nth-child(3){transform:translateX(-50%) rotate(-45deg);bottom:50%;margin-bottom:-1px}

/* Mobile/Desktop language switcher */
.mobile-lang{display:none}
.desktop-lang{display:block}

@media(max-width:900px){
  .nav ul{position:absolute;left:16px;right:16px;top:70px;background:#fff;border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:4px;padding:16px;display:none;z-index:100;box-shadow:var(--shadow)}
  .nav ul.open{display:flex;animation:slideDown .3s ease}
  .nav ul li{width:100%}
  .nav ul a{display:block;padding:12px 16px;text-align:left;border-radius:8px}
  .nav .btn{width:100%;text-align:center}
  .nav-toggle{display:flex;flex-direction:column;justify-content:center;align-items:center;cursor:pointer;z-index:101;flex-shrink:0}
  .nav nav{position:static}
  .mobile-lang{display:block;margin-right:8px}
  .desktop-lang{display:none}
}

@keyframes slideDown{
  from{opacity:0;transform:translateY(-10px)}
  to{opacity:1;transform:translateY(0)}
}

@media(max-width:480px){
  .nav ul{left:8px;right:8px}
}

/* Buttons */
.btn{display:inline-block;padding:10px 16px;border-radius:12px;border:1px solid transparent;font-weight:650;letter-spacing:.2px;transition:all .16s ease}
.btn.primary{background:var(--brand);color:#fff;box-shadow:0 2px 10px rgba(31,77,143,.18)}
.btn.primary:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(31,77,143,.22)}
.btn.secondary{border-color:var(--brand);color:var(--brand);background:transparent}
.btn.secondary:hover{background:#eef2ff}

/* Hero */
.hero{padding:64px 0;background:linear-gradient(180deg, #fff 0%, #f6f9ff 100%)}
.hero h1{font-size:2.2rem;margin:0 0 12px;line-height:1.25;padding-left:8px}
.hero p{max-width:820px;padding-left:8px}
.hero .badges{padding-left:8px}
.hero .btn{margin-left:8px}
.hero .btn:first-child{margin-left:8px}
@media(min-width:768px){.hero h1{font-size:2.6rem}}

/* Mobile hero adjustments */
@media(max-width:480px){
  .hero{padding:32px 0}
  .hero h1{font-size:1.8rem;line-height:1.3;margin-left:0}
  .hero p{font-size:0.95rem;line-height:1.6;margin-left:0}
}

/* Sections */
.section{padding:56px 0}
.section h2{font-size:1.5rem;margin:0 0 16px;position:relative}
.section h2::after{content:"";display:block;width:56px;height:3px;background:var(--brand-2);border-radius:999px;margin-top:10px}

/* Grid & Cards */
.grid{display:grid;gap:22px}
@media(min-width:768px){.grid.cols-3{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card h3{margin-top:0;margin-bottom:8px}

/* Lists */
.list{margin:0;padding-left:18px}
.list li{margin:6px 0;color:var(--ink-2)}

/* Badges */
.badges{display:flex;gap:10px;flex-wrap:wrap}
.badge{background:#fff;border:1px solid var(--border);padding:6px 12px;border-radius:999px;font-size:.9rem;color:var(--ink-2);box-shadow:0 1px 2px rgba(0,0,0,.03)}

/* Template loading states */
.template-loading{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  color:var(--muted);
  font-size:.9rem;
  background:var(--bg);
  border-radius:6px;
  border:1px solid var(--border)
}
.template-loading::before{
  content:"";
  width:16px;
  height:16px;
  border:2px solid var(--border);
  border-top-color:var(--brand);
  border-radius:50%;
  animation:spin 1s linear infinite
}
@keyframes spin{
  to{transform:rotate(360deg)}
}
.template-error{
  padding:8px 12px;
  background:#fef2f2;
  color:#dc2626;
  border:1px solid #fecaca;
  border-radius:6px;
  font-size:.9rem
}

/* Process Flow */
.process-flow{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:1rem;
  margin:2rem 0;
  flex-wrap:wrap
}
.process-step{
  flex:1;
  min-width:200px;
  text-align:center;
  padding:1.5rem;
  background:var(--surface);
  border-radius:var(--radius);
  border:2px solid var(--border);
  position:relative;
  transition:all 0.3s ease
}
.process-step:hover{
  border-color:var(--brand);
  transform:translateY(-4px);
  box-shadow:var(--shadow)
}
.process-number{
  width:60px;
  height:60px;
  border-radius:50%;
  background:var(--brand);
  color:white;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.5rem;
  font-weight:700;
  margin:0 auto 1rem;
  position:relative;
  z-index:2
}
.process-step h3{
  margin:0 0 0.5rem;
  color:var(--ink);
  font-size:1.1rem
}
.process-step p{
  margin:0;
  color:var(--ink-2);
  font-size:0.9rem;
  line-height:1.5
}
.process-arrow{
  font-size:1.5rem;
  color:var(--brand);
  font-weight:bold;
  flex-shrink:0
}
@media(max-width:768px){
  .process-flow{
    flex-direction:column;
    gap:1.5rem
  }
  .process-arrow{
    transform:rotate(90deg);
    font-size:1.2rem
  }
  .process-step{
    min-width:unset;
    width:100%
  }
}

/* Footer */
footer{border-top:1px solid var(--border);padding:28px 0;background:#fff;color:var(--ink-2)}
.muted{color:var(--muted)}