* { margin:0; padding:0; box-sizing:border-box; }
html, body { min-height:100%; }
body { font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif; color:#1c1c1e; line-height:1.6; position:relative; }

.bg { position:fixed; top:0; left:0; right:0; bottom:0; background-size:cover; background-position:center; background-repeat:no-repeat; z-index:-2; }
.overlay { position:fixed; top:0; left:0; right:0; bottom:0; background:linear-gradient(180deg, rgba(255,255,255,0.55) 0%, rgba(240,245,255,0.65) 100%); z-index:-1; }
a { color:#007aff; text-decoration:none; }
i { margin-right:4px; }

.header { position:sticky; top:0; z-index:1000; }
.nav { background:rgba(255,255,255,0.55); backdrop-filter:blur(24px) saturate(180%); -webkit-backdrop-filter:blur(24px) saturate(180%); padding:14px 28px; display:flex; align-items:center; justify-content:space-between; border-bottom:1px solid rgba(255,255,255,0.6); flex-wrap:wrap; gap:12px; box-shadow:0 2px 16px rgba(0,0,0,0.06); }
.logo { font-size:20px; font-weight:700; color:#007aff; display:flex; align-items:center; gap:10px; }
.logo .dot { width:36px; height:36px; background:linear-gradient(135deg,#007aff,#00c6ff); border-radius:10px; display:inline-flex; align-items:center; justify-content:center; color:#fff; font-size:16px; box-shadow:0 4px 12px rgba(0,122,255,0.35); }
.nav-links { display:flex; gap:6px; align-items:center; flex-wrap:wrap; }
.nav-links a { color:#333; font-size:14px; font-weight:500; padding:8px 14px; border-radius:20px; transition:all 0.2s; }
.nav-links a.active, .nav-links a:hover { background:rgba(0,122,255,0.12); color:#007aff; }
.lang-select { padding:7px 12px; border:1px solid rgba(0,0,0,0.1); border-radius:20px; font-size:13px; background:rgba(255,255,255,0.8); cursor:pointer; margin-left:8px; }

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 60px 24px;
  position: relative;
  text-align: left;
}

.hero-card {
  width: 55%;
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border-radius: 32px;
  border: 1px solid rgba(255,255,255,0.6);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
  padding: 48px 52px;
}

.hero h1 { font-size: 44px; font-weight: 700; margin-bottom: 16px; color: #1c1c1e; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.hero-logo { width: 64px; height: 64px; border-radius: 16px; object-fit: cover; flex-shrink: 0; }
.hero p { font-size: 17px; color: #444; margin: 0 0 28px; }
.hero-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.hero .btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 14px 36px; background: linear-gradient(135deg,#007aff,#00c6ff); color: #fff; border-radius: 30px; font-weight: 600; font-size: 16px; box-shadow: 0 6px 20px rgba(0,122,255,0.4); transition: transform 0.2s; white-space: nowrap; }
.hero .btn:hover { transform: translateY(-2px); }
.hero .btn-secondary { background: rgba(0,122,255,0.1); color: #007aff; box-shadow: none; border: 1px solid rgba(0,122,255,0.2); }
.hero .btn-secondary:hover { background: rgba(0,122,255,0.16); }

.hero-preview {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  width: 400px;
  display: flex;
  justify-content: center;
}

.preview-card {
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-radius: 28px;
  border: 1px solid rgba(255,255,255,0.6);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
  padding: 14px;
  width: 100%;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.preview-card img {
  display: block;
  flex: 1 1 calc(33.333% - 7px);
  max-width: calc(33.333% - 7px);
  width: 100%;
  height: auto;
  border-radius: 18px;
  object-fit: cover;
}

/* 关键：允许 <br> 换行，并让 iframe 与图片自动换行 */
.preview-card br {
  flex-basis: 100%;
  height: 0;
  margin: 0;
  content: "";
}

.preview-card iframe {
  flex-shrink: 0;
}

.container { max-width:960px; margin:0 auto; padding:40px 24px; }
.section-title { font-size:30px; font-weight:700; margin-bottom:32px; text-align:center; color:#1c1c1e; }
.cards { display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:20px; }
.card { background:rgba(255,255,255,0.5); backdrop-filter:blur(20px) saturate(180%); -webkit-backdrop-filter:blur(20px) saturate(180%); border-radius:24px; padding:28px; border:1px solid rgba(255,255,255,0.6); box-shadow:0 4px 20px rgba(0,0,0,0.08); transition:transform 0.2s, box-shadow 0.2s; }
.card:hover { transform:translateY(-3px); box-shadow:0 8px 28px rgba(0,0,0,0.12); }
.card h3 { font-size:18px; margin-bottom:10px; color:#1c1c1e; }
.card p { color:#555; font-size:14px; line-height:1.7; }
.card .icon { width:52px; height:52px; background:rgba(0,122,255,0.12); border-radius:14px; display:flex; align-items:center; justify-content:center; font-size:22px; color:#007aff; margin-bottom:16px; }

.timeline { position:relative; padding-left:32px; }
.timeline::before { content:''; position:absolute; left:10px; top:0; bottom:0; width:2px; background:linear-gradient(180deg,#007aff,#00c6ff); }
.tl-item { position:relative; margin-bottom:24px; background:rgba(255,255,255,0.5); backdrop-filter:blur(20px); border-radius:20px; padding:22px 26px; border:1px solid rgba(255,255,255,0.6); box-shadow:0 4px 16px rgba(0,0,0,0.06); }
.tl-item::before { content:''; position:absolute; left:-30px; top:26px; width:14px; height:14px; background:#007aff; border-radius:50%; border:3px solid #fff; box-shadow:0 0 0 2px #007aff; }
.tl-date { font-size:13px; color:#007aff; font-weight:600; }
.tl-title { font-size:17px; font-weight:600; margin:6px 0; color:#1c1c1e; }
.tl-desc { color:#555; font-size:14px; }

.cert-wrap { background:rgba(255,255,255,0.5); backdrop-filter:blur(20px) saturate(180%); border-radius:24px; border:1px solid rgba(255,255,255,0.6); overflow:hidden; box-shadow:0 4px 20px rgba(0,0,0,0.08); }
.cert-table { width:100%; border-collapse:collapse; }
.cert-table th, .cert-table td { padding:13px 18px; text-align:left; border-bottom:1px solid rgba(0,0,0,0.06); font-size:14px; }
.cert-table th { background:rgba(0,122,255,0.1); color:#007aff; font-weight:600; position:sticky; top:0; }
.cert-table tr:last-child td { border-bottom:none; }
.badge { display:inline-block; padding:3px 12px; border-radius:20px; font-size:12px; font-weight:600; background:rgba(52,199,89,0.15); color:#2e7d32; }
.copy-btn { background:rgba(0,122,255,0.1); color:#007aff; border:none; padding:6px 14px; border-radius:16px; cursor:pointer; font-size:12px; font-weight:600; transition:all 0.2s; }
.copy-btn:hover { background:#007aff; color:#fff; }

.form-card { background:rgba(255,255,255,0.55); backdrop-filter:blur(28px) saturate(180%); border-radius:28px; border:1px solid rgba(255,255,255,0.6); box-shadow:0 12px 40px rgba(0,0,0,0.12); padding:44px; max-width:640px; margin:0 auto; }
.form-card h2 { font-size:24px; margin-bottom:12px; color:#1c1c1e; }
.form-card p { color:#555; font-size:15px; margin-bottom:20px; }
.form-card ul { margin:0 0 24px 20px; color:#444; line-height:2; font-size:14px; }
.mail-btn { display:block; text-align:center; padding:16px; background:linear-gradient(135deg,#007aff,#00c6ff); color:#fff !important; border-radius:16px; font-weight:600; font-size:16px; box-shadow:0 6px 20px rgba(0,122,255,0.35); margin-top:16px; }

footer { text-align:center; padding:40px 24px; font-size:13px; color:#555; margin-top:48px; }
footer a { color:#007aff; }

@media (max-width: 1024px) {
  .hero {
    text-align: center;
    padding: 40px 16px;
    display: flex;
    flex-direction: column;
    gap: 30px;
  }
  .hero-card {
    width: 100%;
    padding: 36px 24px;
  }
  .hero h1 { justify-content: center; font-size: 32px; }
  .hero p { margin: 0 auto 24px; }
  .hero-actions { justify-content: center; flex-direction: column; }
  .hero .btn { width: 100%; max-width: 280px; }
  
  .hero-preview {
    position: static;
    transform: none;
    width: 100%;
    max-width: 100%;
    margin: 40px auto 0 auto;
  }
  
  .preview-card {
    padding: 10px;
    gap: 6px;
  }

  .preview-card img {
    border-radius: 12px;
    flex: 1 1 calc(33.333% - 4px);
    max-width: calc(33.333% - 4px);
  }

  .nav { flex-direction: column; justify-content: center; padding: 12px 16px; gap: 12px; }
  .nav-links { justify-content: center; }
  .nav-links a { padding: 6px 12px; font-size: 13px; }
  .lang-select { margin-left: 0; margin-top: 4px; }
  .hero h1 { font-size: 26px; flex-direction: column; gap: 10px; }
  .hero-logo { width: 72px; height: 72px; }
  .hero-card { padding: 28px 20px; }
}