/* 网际快车-评测知识库 (wjkcloud.xyz) Titanium Obsidian & Emerald Cyan Theme */
:root {
  --bg-dark: #080D11;
  --bg-surface: #0E171E;
  --bg-card: rgba(15, 23, 30, 0.85);
  --bg-card-hover: rgba(22, 33, 44, 0.95);
  --border: rgba(16, 185, 129, 0.22);
  --border-glow: rgba(52, 211, 153, 0.45);
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --primary: #10B981;
  --primary-glow: #34D399;
  --accent-cyan: #06B6D4;
  --accent-amber: #F59E0B;
  --accent-gold: #FBBF24;
  --gradient-main: linear-gradient(135deg, #10B981 0%, #06B6D4 50%, #F59E0B 100%);
  --gradient-badge: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 45%),
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 36px 36px, 36px 36px;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 13, 17, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.brand img {
  width: 40px;
  height: 40px;
}
.brand-text {
  display: flex;
  flex-direction: column;
}
.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}
.brand-tag {
  font-size: 0.72rem;
  color: var(--primary-glow);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 600;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--primary-glow);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-badge);
  color: #000 !important;
  padding: 8px 18px;
  border-radius: 8px;
  font-weight: 700 !important;
  font-size: 0.9rem;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
}

/* Hero Section */
.hero {
  padding: 70px 0 50px;
  text-align: center;
}
.score-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 20px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--border-glow);
  border-radius: 9999px;
  margin-bottom: 24px;
}
.score-number {
  background: var(--gradient-badge);
  color: #000;
  font-weight: 900;
  font-size: 1.1rem;
  padding: 2px 10px;
  border-radius: 9999px;
  font-family: var(--font-mono);
}
.score-text {
  color: var(--primary-glow);
  font-size: 0.9rem;
  font-weight: 600;
}
.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero h1 span {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 36px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-main);
  color: #000;
  padding: 14px 32px;
  border-radius: 10px;
  font-weight: 800;
  font-size: 1.05rem;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.35);
  transition: all 0.2s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(16, 185, 129, 0.55);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 23, 30, 0.8);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-secondary:hover {
  background: rgba(16, 185, 129, 0.12);
  border-color: var(--primary);
}

/* Score Breakdown Grid */
.score-section {
  padding: 40px 0 60px;
}
.score-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.score-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  transition: transform 0.2s, border-color 0.2s;
}
.score-item:hover {
  transform: translateY(-3px);
  border-color: var(--primary-glow);
}
.score-val {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent-gold);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}
.score-label {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.score-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ISP Speed Benchmark */
.isp-section {
  padding: 40px 0 60px;
}
.isp-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  margin-top: 24px;
}
.isp-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  flex-wrap: wrap;
  gap: 12px;
}
.isp-row:last-child {
  border-bottom: none;
}
.isp-name {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.05rem;
  min-width: 180px;
}
.isp-badge {
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary-glow);
  font-weight: 600;
}
.isp-bar-container {
  flex: 1;
  min-width: 200px;
  margin: 0 20px;
  background: rgba(255, 255, 255, 0.05);
  height: 10px;
  border-radius: 9999px;
  overflow: hidden;
}
.isp-bar {
  height: 100%;
  background: var(--gradient-main);
  border-radius: 9999px;
}
.isp-speed {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary-glow);
  font-family: var(--font-mono);
  min-width: 120px;
  text-align: right;
}

/* 5-Step Pipeline */
.steps-section {
  padding: 50px 0;
}
.section-title {
  text-align: center;
  margin-bottom: 40px;
}
.section-title h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.section-title p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.step-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 24px 20px;
  position: relative;
  transition: all 0.2s;
}
.step-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}
.step-num {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 1.4rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.1);
  font-family: var(--font-mono);
}
.step-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.step-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.step-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* FAQ Accordion */
.faq-section {
  padding: 50px 0 80px;
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq-item:hover {
  border-color: var(--border-glow);
}
.faq-question {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}
.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--primary-glow);
  font-weight: 400;
  transition: transform 0.2s;
}
.faq-item.active .faq-question::after {
  content: "−";
  transform: rotate(180deg);
}
.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  display: none;
}
.faq-item.active .faq-answer {
  display: block;
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.15) 100%);
  border: 1px solid var(--border-glow);
  border-radius: 20px;
  padding: 48px;
  text-align: center;
  margin: 40px 0 80px;
}
.cta-banner h2 {
  font-size: 2.2rem;
  margin-bottom: 16px;
  font-weight: 800;
}
.cta-banner p {
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 30px;
  font-size: 1.05rem;
}

/* Footer */
footer {
  background: #04080B;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 30px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-desc {
  margin-top: 16px;
  line-height: 1.7;
  max-width: 380px;
  color: var(--text-muted);
}
.footer-col h4 {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.footer-col ul {
  list-style: none;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--primary-glow);
}
.footer-links-box {
  background: rgba(15, 23, 30, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 36px;
}
.footer-links-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.friendly-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
}
.friendly-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}
.friendly-links a:hover {
  color: var(--primary-glow);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* Article Layout */
.article-header {
  padding: 60px 0 30px;
  text-align: center;
}
.article-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.article-meta {
  display: flex;
  justify-content: center;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 30px;
}
.article-content {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px;
  line-height: 1.8;
  color: #CBD5E1;
  font-size: 1.05rem;
}
.article-content h2 {
  font-size: 1.6rem;
  color: var(--text-primary);
  margin: 36px 0 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 8px;
}
.article-content h3 {
  font-size: 1.25rem;
  color: var(--primary-glow);
  margin: 24px 0 12px;
}
.article-content p {
  margin-bottom: 18px;
}
.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  padding: 12px 20px;
  background: rgba(16, 185, 129, 0.08);
  margin: 24px 0;
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: #E2E8F0;
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.1rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .article-content { padding: 24px; }
}