:root {
  --ink: #1a0a00;
  --paper: #f5efe0;
  --ember: #d94a2a;
  --gold: #c9a84c;
  --smoke: rgba(26, 10, 0, 0.08);
  --parchment: #ede4d0;
  --shadow: rgba(26, 10, 0, 0.25);
  --radius: 0;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Noto Serif SC", "Source Han Serif SC", serif;
  --transition: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ===== CONTAINER ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== SITE HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
  padding: 0.75rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  line-height: 1;
  position: relative;
}

.logo::after {
  content: "";
  display: block;
  width: 100%;
  height: 3px;
  background: var(--ember);
  margin-top: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.logo:hover::after {
  transform: scaleX(1);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.main-nav a {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition);
}

.main-nav a::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--ember);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition);
}

.main-nav a:hover {
  color: var(--ember);
}

.main-nav a:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  background: var(--ink);
  color: var(--paper) !important;
  padding: 0.5rem 1.25rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.05em;
  border: 2px solid var(--ink);
  transition: background var(--transition), color var(--transition);
}

.nav-cta::before {
  display: none !important;
}

.nav-cta:hover {
  background: var(--ember) !important;
  color: var(--paper) !important;
  border-color: var(--ember);
}

.menu-toggle {
  display: none;
  background: none;
  border: 2px solid var(--ink);
  width: 44px;
  height: 44px;
  cursor: pointer;
  position: relative;
  transition: border-color var(--transition);
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  margin: 5px auto;
  transition: all var(--transition);
}

.menu-toggle:hover {
  border-color: var(--ember);
}

/* ===== HERO ===== */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  padding: 5rem 0 4rem;
  align-items: center;
  min-height: 80vh;
  border-bottom: 2px solid var(--ink);
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-eyebrow {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ember);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-eyebrow::before {
  content: "";
  display: inline-block;
  width: 2rem;
  height: 2px;
  background: var(--ember);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.hero p {
  font-size: 1.125rem;
  color: rgba(26, 10, 0, 0.7);
  max-width: 32rem;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.hero-image {
  background: var(--parchment);
  aspect-ratio: 4 / 3;
  width: 100%;
  position: relative;
  overflow: hidden;
  border: 2px solid var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.05em;
}

.hero-image::after {
  content: "✦ 赏金国际";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--parchment);
  opacity: 0.9;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.2);
  mix-blend-mode: multiply;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.75rem 2rem;
  border: 2px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  position: relative;
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink);
  z-index: -1;
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition);
}

.btn:hover {
  color: var(--paper);
}

.btn:hover::after {
  transform: scaleY(1);
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.btn-primary::after {
  background: var(--ember);
}

.btn-primary:hover {
  border-color: var(--ember);
  color: var(--paper);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.btn-outline::after {
  background: var(--ink);
}

.btn-outline:hover {
  color: var(--paper);
  border-color: var(--ink);
}

/* ===== SECTION ===== */
.section {
  padding: 5rem 0;
  border-bottom: 2px solid var(--ink);
}

.section-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ember);
  margin-bottom: 0.75rem;
  display: inline-block;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 24rem;
  margin-bottom: 1.5rem;
}

.section-desc {
  font-size: 1.0625rem;
  color: rgba(26, 10, 0, 0.7);
  max-width: 36rem;
  line-height: 1.6;
}

/* ===== CARDS GRID ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.category-card {
  background: var(--parchment);
  border: 2px solid var(--ink);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: all var(--transition);
  position: relative;
}

.category-card::before {
  content: "";
  position: absolute;
  inset: -2px;
  border: 2px solid var(--ember);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.category-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 8px 8px 0 var(--ink);
}

.category-card:hover::before {
  opacity: 1;
}

.card-icon {
  font-size: 2.5rem;
  line-height: 1;
  color: var(--ember);
  margin-bottom: 0.25rem;
}

.category-card h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--ink);
}

.category-card p {
  font-size: 0.9375rem;
  color: rgba(26, 10, 0, 0.65);
  line-height: 1.5;
}

.card-link {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ember);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(26, 10, 0, 0.15);
  transition: gap var(--transition);
}

.card-link:hover {
  gap: 1rem;
}

/* ===== FEATURE BLOCK ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 4rem 0;
}

.feature-image {
  background: var(--parchment);
  aspect-ratio: 5 / 4;
  width: 100%;
  border: 2px solid var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ink);
  position: relative;
  overflow: hidden;
}

.feature-image::after {
  content: "✦ 行业领先";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--parchment);
  opacity: 0.85;
}

.feature-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.feature-text h3 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.15;
}

.feature-text p {
  font-size: 1rem;
  color: rgba(26, 10, 0, 0.7);
  line-height: 1.6;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9375rem;
  color: var(--ink);
}

.feature-list li::before {
  content: "→";
  color: var(--ember);
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== STATS BAR ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
  background: var(--ink);
  border: 2px solid var(--ink);
  margin: 3rem 0;
}

.stat-item {
  background: var(--paper);
  padding: 2.5rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: background var(--transition);
}

.stat-item:hover {
  background: var(--parchment);
}

.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1;
  color: var(--ember);
  letter-spacing: -0.03em;
}

.stat-label {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink);
}

/* ===== CONTENT WALL ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1px;
  background: var(--ink);
  border: 2px solid var(--ink);
  margin: 3rem 0;
}

.content-wall-item {
  background: var(--paper);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background var(--transition);
}

.content-wall-item:hover {
  background: var(--parchment);
}

.content-wall-item h4 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
}

.content-wall-body {
  font-size: 0.9375rem;
  color: rgba(26, 10, 0, 0.65);
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 2rem;
}

.faq-item {
  border: 2px solid var(--ink);
  background: var(--paper);
  transition: all var(--transition);
}

.faq-item summary {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 600;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  transition: color var(--transition);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--ember);
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item[open] summary {
  color: var(--ember);
}

.faq-answer {
  padding: 0 1.5rem 1.5rem;
  font-size: 0.9375rem;
  color: rgba(26, 10, 0, 0.7);
  line-height: 1.6;
  border-top: 1px solid var(--smoke);
  padding-top: 1rem;
}

/* ===== CTA BANNER ===== */
.cta-banner {
  background: var(--ink);
  color: var(--paper);
  padding: 4rem 2rem;
  text-align: center;
  border: 2px solid var(--ink);
  margin: 3rem 0;
  position: relative;
}

.cta-banner::before {
  content: "";
  position: absolute;
  inset: -4px;
  border: 2px solid var(--ember);
  pointer-events: none;
}

.cta-banner h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 32rem;
  margin: 0 auto 1.5rem;
}

.cta-banner p {
  font-size: 1.0625rem;
  color: rgba(245, 239, 224, 0.7);
  max-width: 28rem;
  margin: 0 auto 2rem;
}

.cta-banner .btn {
  border-color: var(--paper);
  color: var(--paper);
}

.cta-banner .btn::after {
  background: var(--ember);
}

.cta-banner .btn:hover {
  border-color: var(--ember);
}

/* ===== SITE FOOTER ===== */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: 4rem 0 0;
  border-top: 2px solid var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(245, 239, 224, 0.15);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-brand .logo {
  color: var(--paper);
  font-size: 1.5rem;
}

.footer-brand .logo::after {
  background: var(--gold);
}

.footer-brand p {
  font-size: 0.875rem;
  color: rgba(245, 239, 224, 0.6);
  line-height: 1.6;
  max-width: 20rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.footer-col a {
  font-size: 0.875rem;
  color: rgba(245, 239, 224, 0.6);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--paper);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.5rem 0;
  font-size: 0.8125rem;
  color: rgba(245, 239, 224, 0.4);
}

/* ===== UTILITY ===== */
.text-accent {
  color: var(--ember);
}

.text-center {
  text-align: center;
}

.seo-description {
  font-size: 0.875rem;
  color: rgba(26, 10, 0, 0.5);
  max-width: 48rem;
  line-height: 1.7;
  margin: 2rem auto;
  text-align: center;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 0;
    border-top: 2px solid var(--ink);
    margin-top: 0.75rem;
  }

  .main-nav.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 3rem 0;
    min-height: auto;
    gap: 2rem;
  }

  .hero-image {
    aspect-ratio: 16 / 9;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 3rem 0;
  }

  .feature-image {
    order: -1;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .content-wall {
    grid-template-columns: 1fr;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    padding: 3rem 1.5rem;
  }

  .section {
    padding: 3rem 0;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }

  .stat-item {
    padding: 1.5rem 1rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .feature-text h3 {
    font-size: 1.5rem;
  }

  .content-wall-item {
    padding: 1.5rem;
  }

  .faq-item summary {
    padding: 1rem;
    font-size: 0.9375rem;
  }

  .faq-answer {
    padding: 0 1rem 1rem;
  }
}