* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --primary-red: #900000;
  --primary-red-hover: #700000;
  --success-green: #2e7d32;
  --bg-white: #ffffff;
  --bg-gray: #f7f7f7;
  --bg-warm: #fbf9f8;
  --text-dark: #222222;
  --text-body: #555555;
  --text-light: #888888;
  --border-color: #eaeaea;
  --radius-sm: 6px;
  --radius-md: 10px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-white);
  color: var(--text-body);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { color: var(--text-dark); font-weight: 600; line-height: 1.35; }
a { text-decoration: none; color: inherit; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
section { padding: 80px 0; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; color: var(--primary-red); }
.brand img { height: 34px; width: auto; display: block; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a { font-size: 0.95rem; color: var(--text-dark); font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--primary-red); }
.menu-toggle { display: none; background: none; border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 6px 12px; font-size: 0.9rem; color: var(--text-dark); cursor: pointer; }

/* Hero */
.hero { padding: 90px 0 70px; background: var(--bg-warm); border-bottom: 1px solid var(--border-color); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items: center; }
.hero h1 { font-size: 3rem; letter-spacing: -0.02em; margin-bottom: 20px; color: var(--primary-red); }
.hero h1 span { color: var(--text-dark); }
.hero .lead { font-size: 1.15rem; color: var(--text-body); margin-bottom: 24px; }
.hero .tagline { font-size: 0.95rem; color: var(--text-body); padding-left: 16px; border-left: 3px solid var(--primary-red); margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 30px; font-size: 1rem; font-weight: 500; border-radius: var(--radius-sm);
  transition: all 0.2s ease; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--primary-red); color: #fff; }
.btn-primary:hover { background: var(--primary-red-hover); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(144, 0, 0, 0.2); }
.btn-outline { background: transparent; color: var(--text-dark); border-color: var(--border-color); }
.btn-outline:hover { border-color: var(--primary-red); color: var(--primary-red); }
.hero-visual { display: flex; justify-content: center; }
.hero-visual img { width: 100%; max-width: 340px; border-radius: var(--radius-md); box-shadow: var(--shadow-md); border: 1px solid var(--border-color); }

/* Section title */
.section-title { font-size: 2rem; margin-bottom: 16px; position: relative; display: inline-block; }
.section-title::after { content: ''; position: absolute; left: 0; bottom: -8px; width: 36px; height: 3px; background: var(--primary-red); }
.section-desc { color: var(--text-body); font-size: 1.05rem; max-width: 760px; margin-bottom: 40px; }

/* Core Features */
.core-features { background: var(--bg-gray); border-bottom: 1px solid var(--border-color); }
.core-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.core-card { background: var(--bg-white); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 28px 22px; transition: transform 0.25s, box-shadow 0.25s; }
.core-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.core-icon { font-size: 1.5rem; font-weight: 700; color: var(--primary-red); margin-bottom: 14px; }
.core-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.core-card p { font-size: 0.92rem; color: var(--text-body); }

/* Guide */
.guide-section { background: var(--bg-white); }
.guide-intro { font-size: 1rem; color: var(--text-body); margin-bottom: 36px; background: #fdf5f5; padding: 18px 22px; border-left: 4px solid var(--primary-red); border-radius: 4px; }
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.guide-card { background: var(--bg-white); border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform 0.25s, box-shadow 0.25s; display: flex; flex-direction: column; }
.guide-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.guide-img-box { width: 100%; background: #f4f4f4; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: center; padding: 14px; aspect-ratio: 4 / 3; }
.guide-img-box.tall { aspect-ratio: 3 / 4; }
.guide-img-box img { max-width: 100%; max-height: 100%; object-fit: contain; border: 1px solid #eee; box-shadow: 0 2px 8px rgba(0,0,0,0.06); background: #fff; }
.guide-content { padding: 22px; flex: 1; }
.guide-step { display: inline-block; background: var(--primary-red); color: #fff; font-size: 0.75rem; font-weight: 700; padding: 3px 10px; border-radius: 12px; margin-bottom: 10px; letter-spacing: 0.05em; }
.guide-content h3, .guide-content h4 { font-size: 1.08rem; margin-bottom: 8px; }
.guide-content p { font-size: 0.92rem; color: var(--text-body); }

/* Features showcase */
.features-section { background: var(--bg-gray); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.feature-card { background: var(--bg-white); border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); }
.feature-card img { width: 100%; display: block; border-bottom: 1px solid var(--border-color); }
.feature-text { padding: 22px; }
.feature-text h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-text p { font-size: 0.92rem; color: var(--text-body); }

/* Experience */
.experience-section { background: var(--bg-white); }
.exp-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.exp-card { background: var(--bg-gray); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 28px; transition: transform 0.2s, box-shadow 0.2s, background 0.2s; }
.exp-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); background: #fff; }
.exp-question { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 14px; }
.exp-q-icon { background: var(--primary-red); color: #fff; width: 26px; height: 26px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 700; flex-shrink: 0; margin-top: 2px; }
.exp-question h3 { font-size: 1.05rem; margin: 0; }
.exp-answer { font-size: 0.92rem; color: var(--text-body); line-height: 1.8; padding-left: 40px; }
.exp-author { display: block; margin-top: 10px; font-size: 0.82rem; color: var(--text-light); }

/* Status */
.status-section { background: var(--bg-warm); border-top: 1px solid var(--border-color); padding: 60px 0; }
.status-card { background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-md); overflow: hidden; border: 1px solid var(--border-color); max-width: 860px; margin: 0 auto; }
.status-header { background: var(--primary-red); color: #fff; padding: 18px 30px; display: flex; justify-content: space-between; align-items: center; }
.status-header h2 { color: #fff; font-size: 1.25rem; margin: 0; }
.status-badge { background: rgba(255,255,255,0.2); padding: 5px 14px; border-radius: 20px; font-size: 0.82rem; font-weight: 500; }
.status-body { padding: 30px; }
.status-alert { background: #fdf5f5; border-left: 4px solid var(--primary-red); border-radius: 4px; padding: 18px 22px; font-size: 0.92rem; color: var(--text-dark); margin-bottom: 24px; }
.time-box { background: var(--bg-gray); border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 22px; }
.time-label { color: var(--text-light); font-size: 0.88rem; display: block; margin-bottom: 6px; }
.time-main { color: var(--primary-red); font-size: 2.2rem; font-weight: 700; margin-bottom: 12px; line-height: 1.2; }
.time-desc { font-size: 0.9rem; color: var(--text-body); margin-bottom: 20px; }
.progress-container { border-top: 1px dashed var(--border-color); padding-top: 18px; }
.progress-info { display: flex; justify-content: space-between; font-size: 0.85rem; color: var(--text-body); margin-bottom: 8px; }
.progress-bar-bg { background: #e5e5e5; height: 18px; border-radius: 10px; overflow: hidden; }
.progress-bar-fill { background: var(--primary-red); height: 100%; width: 37%; border-radius: 10px; display: flex; align-items: center; justify-content: flex-end; padding-right: 10px; color: #fff; font-size: 0.72rem; font-weight: 600; }

/* Status visual */
.status-visuals { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 40px; }
.status-visual-card { background: #fff; border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow: hidden; }
.status-visual-card img { width: 100%; display: block; }
.status-visual-card p { padding: 14px 18px; font-size: 0.88rem; color: var(--text-body); }

/* CTA */
.cta-section { background: var(--primary-red); color: #fff; padding: 80px 0; text-align: center; }
.cta-section h2 { color: #fff; font-size: 2.1rem; margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.85); font-size: 1.05rem; margin-bottom: 34px; max-width: 640px; margin-left: auto; margin-right: auto; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-white { background: #fff; color: var(--primary-red); border-color: #fff; }
.btn-white:hover { background: var(--bg-gray); transform: translateY(-2px); }

/* Footer */
.site-footer { background: var(--bg-white); border-top: 1px solid var(--border-color); padding: 50px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 30px; }
.footer-brand h3 { font-size: 1.15rem; color: var(--primary-red); margin-bottom: 14px; }
.footer-brand p { color: var(--text-body); font-size: 0.88rem; line-height: 1.8; max-width: 320px; }
.footer-col h4 { font-size: 0.95rem; margin-bottom: 14px; color: var(--text-dark); }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--text-body); font-size: 0.88rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--primary-red); }
.footer-bottom { border-top: 1px solid var(--border-color); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; font-size: 0.8rem; color: var(--text-light); flex-wrap: wrap; gap: 10px; }
.footer-bottom a { color: var(--text-light); }
.footer-bottom a:hover { color: var(--primary-red); }
.footer-bottom time { font-size: 0.8rem; color: var(--text-light); }

/* Responsive */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero .tagline { border-left: none; padding-left: 0; border-top: 2px solid var(--primary-red); padding-top: 16px; display: inline-block; }
  .hero-actions { justify-content: center; }
  .hero h1 { font-size: 2.5rem; }
  .core-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  section { padding: 55px 0; }
  .hero { padding: 70px 0 50px; }
  .hero h1 { font-size: 2rem; }
  .nav-links { display: none; }
  .nav-links.active { display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: #fff; padding: 20px 24px; border-bottom: 1px solid var(--border-color); gap: 16px; box-shadow: var(--shadow-md); }
  .menu-toggle { display: inline-block; }
  .core-grid, .guide-grid, .features-grid, .exp-grid, .status-visuals { grid-template-columns: 1fr; }
  .status-header { flex-direction: column; align-items: flex-start; gap: 10px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .time-main { font-size: 1.8rem; }
}