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

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  overflow-x: hidden;
  background-color: #FAF6F0;
  background-image:
    radial-gradient(circle at 25% 15%, rgba(212, 72, 46, 0.035) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(46, 107, 128, 0.035) 0%, transparent 40%);
  color: #2F2A28;
  line-height: 1.7;
}

::selection {
  background: #D4482E;
  color: #FAF6F0;
}

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

.section {
  padding: 90px 0;
  position: relative;
}

.section:nth-child(even) {
  background: #F2EBE1;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 246, 240, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 3px solid #2F2A28;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 100%;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    #D4482E 0px,
    #D4482E 8px,
    transparent 8px,
    transparent 16px
  );
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.35rem;
  text-decoration: none;
  color: #2F2A28;
  letter-spacing: -0.02em;
  transition: transform 0.2s;
}

.logo:hover {
  transform: scale(1.02);
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  background: #D4482E;
  color: #FAF6F0;
  position: relative;
  box-shadow: 3px 3px 0 #2F2A28;
}

.logo-icon::before {
  content: '影';
  font-size: 1.25rem;
  font-weight: 900;
  line-height: 1;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: #2F2A28;
  padding: 4px 0;
  position: relative;
  transition: color 0.25s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: #D4482E;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-nav a:hover {
  color: #D4482E;
}

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

.nav-cta {
  padding: 10px 24px;
  background: #2F2A28;
  color: #FAF6F0 !important;
  font-weight: 700;
  border: 2px solid #2F2A28;
  border-radius: 0;
  box-shadow: 3px 3px 0 #D4482E;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.nav-cta:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 #D4482E;
  background: #3a3532;
  color: #FAF6F0 !important;
}

.nav-cta::after {
  display: none;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  position: relative;
  background: transparent;
  border: 2px solid #2F2A28;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s;
}

.menu-toggle::before {
  content: '';
  position: absolute;
  top: 13px;
  left: 10px;
  right: 10px;
  height: 3px;
  background: #2F2A28;
  box-shadow: 0 9px 0 #2F2A28, 0 18px 0 #2F2A28;
  transition: background 0.2s, box-shadow 0.2s;
}

.menu-toggle:hover {
  background: #F2EBE1;
}

/* ===== Hero ===== */
.hero {
  min-height: 75vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, #FAF6F0 55%, #F2EBE1 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 35%;
  height: 100%;
  background: repeating-linear-gradient(
    90deg,
    transparent 0px,
    transparent 26px,
    rgba(212, 72, 46, 0.06) 26px,
    rgba(212, 72, 46, 0.06) 30px
  );
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 24px;
  left: 0;
  width: 100%;
  height: 8px;
  background: repeating-linear-gradient(
    90deg,
    #D4482E 0px, #D4482E 18px,
    #D4A52E 18px, #D4A52E 26px,
    #2E6B80 26px, #2E6B80 34px,
    transparent 34px, transparent 50px
  );
  opacity: 0.35;
}

.hero-content {
  max-width: 680px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 18px;
  background: #D4A52E;
  color: #2F2A28;
  border: 2px solid #2F2A28;
  border-radius: 0;
  box-shadow: 3px 3px 0 rgba(47, 42, 40, 0.25);
  margin-bottom: 20px;
  letter-spacing: 2px;
  text-transform: uppercase;
  transform: rotate(-2deg);
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.3rem);
  line-height: 1.08;
  margin-bottom: 22px;
  font-weight: 900;
  letter-spacing: -0.025em;
  color: #2F2A28;
  position: relative;
  display: inline-block;
}

.hero h1::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 10px;
  background: linear-gradient(90deg, #D4482E, #D4A52E);
  transform: skewX(-15deg);
  z-index: -1;
  opacity: 0.3;
}

.hero p {
  font-size: 1.08rem;
  opacity: 0.72;
  max-width: 540px;
  margin-bottom: 34px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: 4px;
  overflow: hidden;
  border: 3px solid #2F2A28;
  box-shadow: 10px 10px 0 rgba(212, 72, 46, 0.28);
  transform: rotate(2deg);
  position: relative;
  z-index: 1;
  transition: transform 0.4s, box-shadow 0.4s;
}

.hero-image:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 14px 14px 0 rgba(212, 72, 46, 0.35);
}

.hero-image::before {
  content: '';
  position: absolute;
  top: -14px;
  left: -14px;
  width: 60px;
  height: 60px;
  background: #F2EBE1;
  border: 3px solid #2F2A28;
  border-radius: 50%;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
}

.hero-image::before {
  content: '▶';
  font-size: 0.9rem;
  color: #D4482E;
  padding-left: 4px;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  filter: sepia(0.12) saturate(0.95) contrast(1.04);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 0;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid #2F2A28;
  text-decoration: none;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 4px 4px 0 #2F2A28;
}

.btn-primary {
  background: #D4482E;
  color: #FAF6F0;
}

.btn-primary:hover {
  background: #bc3a22;
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 #2F2A28;
}

.btn-outline {
  background: transparent;
  border: 2px solid #2F2A28;
  color: #2F2A28;
  box-shadow: 4px 4px 0 rgba(47, 42, 40, 0.2);
}

.btn-outline:hover {
  background: #2F2A28;
  color: #FAF6F0;
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 rgba(47, 42, 40, 0.3);
}

/* ===== 标签/标题 ===== */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 14px;
  padding: 4px 14px;
  background: #D4A52E;
  color: #2F2A28;
  border: 2px solid #2F2A28;
  box-shadow: 3px 3px 0 rgba(47, 42, 40, 0.15);
  transform: rotate(-1deg);
}

.section-title {
  font-size: clamp(1.9rem, 3.8vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: #2F2A28;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #D4482E, #D4A52E);
  transform: skewX(-12deg);
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 42px;
  font-size: 1rem;
  line-height: 1.8;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  background: #FFFFFF;
  border-radius: 4px;
  padding: 30px 28px;
  border: 2px solid #2F2A28;
  box-shadow: 6px 6px 0 rgba(212, 72, 46, 0.22);
  position: relative;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    #D4482E 0px, #D4482E 12px,
    #2F2A28 12px, #2F2A28 18px
  );
}

.category-card:nth-child(odd) {
  transform: rotate(-0.8deg);
}

.category-card:nth-child(even) {
  transform: rotate(0.8deg);
}

.category-card:hover {
  transform: rotate(0deg) translateY(-5px);
  box-shadow: 9px 9px 0 rgba(212, 72, 46, 0.35);
}

.category-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 30px;
  height: 30px;
  background: #F2EBE1;
  border-top: 2px solid #2F2A28;
  border-left: 2px solid #2F2A28;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: #F2EBE1;
  border: 2px solid #2F2A28;
  box-shadow: 3px 3px 0 rgba(47, 42, 40, 0.2);
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: #D4482E;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s, color 0.2s;
}

.card-link:hover {
  gap: 10px;
  color: #2F2A28;
}

/* ===== 特性块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: 4px;
  overflow: hidden;
  border: 3px solid #2F2A28;
  box-shadow: 8px 8px 0 rgba(46, 107, 128, 0.25);
  position: relative;
  transition: box-shadow 0.3s, transform 0.3s;
}

.feature-image:hover {
  transform: translate(-2px, -2px);
  box-shadow: 12px 12px 0 rgba(46, 107, 128, 0.35);
}

.feature-image::before {
  content: '';
  position: absolute;
  top: -10px;
  right: -10px;
  width: 50px;
  height: 50px;
  background: #D4A52E;
  border: 2px solid #2F2A28;
  z-index: 2;
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  filter: sepia(0.1) saturate(0.92);
}

.feature-text {
  font-size: 0.98rem;
  opacity: 0.85;
  line-height: 1.8;
}

.feature-list {
  list-style: none;
  margin-top: 18px;
}

.feature-list li {
  padding: 9px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px dashed rgba(47, 42, 40, 0.18);
  font-weight: 500;
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li::before {
  content: '▶';
  font-size: 0.8rem;
  color: #D4482E;
  font-weight: 900;
}

/* ===== 数据条 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 28px 20px;
  border-radius: 4px;
  border: 2px solid #2F2A28;
  background: #FFFFFF;
  box-shadow: 5px 5px 0 rgba(47, 42, 40, 0.22);
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
}

.stat-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(212, 72, 46, 0.3);
}

.stat-item::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    #D4482E 0px, #D4482E 8px,
    transparent 8px, transparent 12px
  );
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1;
  color: #D4482E;
  font-family: 'Georgia', 'Times New Roman', serif;
}

.stat-label {
  font-size: 0.88rem;
  opacity: 0.6;
  margin-top: 8px;
  letter-spacing: 1px;
  font-weight: 500;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 4px;
  overflow: hidden;
  border: 2px solid #2F2A28;
  background: #FFFFFF;
  box-shadow: 5px 5px 0 rgba(46, 107, 128, 0.22);
  transition: transform 0.25s, box-shadow 0.25s;
  position: relative;
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: 9px 9px 0 rgba(46, 107, 128, 0.35);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  filter: sepia(0.18) saturate(0.88) contrast(1.06);
  transition: filter 0.35s;
}

.content-wall-item:hover img {
  filter: sepia(0) saturate(1) contrast(1);
}

.content-wall-body {
  padding: 22px 20px;
  border-top: 2px solid #2F2A28;
  position: relative;
}

.content-wall-body::before {
  content: '';
  position: absolute;
  top: -4px;
  left: 0;
  width: 100%;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    #D4A52E 0px, #D4A52E 10px,
    transparent 10px, transparent 16px
  );
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 2px solid #2F2A28;
  border-radius: 4px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: #FFFFFF;
  box-shadow: 4px 4px 0 rgba(47, 42, 40, 0.12);
  transition: box-shadow 0.25s, transform 0.25s;
}

.faq-item:hover {
  box-shadow: 6px 6px 0 rgba(212, 72, 46, 0.25);
}

.faq-item.open {
  box-shadow: 6px 6px 0 rgba(212, 72, 46, 0.35);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 400;
  color: #D4482E;
  line-height: 1;
  transition: transform 0.3s;
}

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

.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  opacity: 0.72;
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px dashed rgba(47, 42, 40, 0.12);
  padding-top: 12px;
  margin-top: -4px;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ===== CTA横幅 ===== */
.cta-banner {
  padding: 64px 24px;
  text-align: center;
  border-radius: 4px;
  color: #FAF6F0;
  background: linear-gradient(135deg, #D4482E 0%, #b03822 100%);
  border: 3px solid #2F2A28;
  box-shadow: 10px 10px 0 rgba(47, 42, 40, 0.25);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 8px;
  background: repeating-linear-gradient(
    90deg,
    #FAF6F0 0px, #FAF6F0 14px,
    #2F2A28 14px, #2F2A28 22px,
    #D4A52E 22px, #D4A52E 30px
  );
}

.cta-banner h2 {
  color: #FAF6F0;
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.cta-banner .btn-primary {
  background: #FAF6F0;
  color: #D4482E;
  border-color: #2F2A28;
  box-shadow: 4px 4px 0 rgba(47, 42, 40, 0.5);
}

.cta-banner .btn-primary:hover {
  background: #F2EBE1;
  color: #D4482E;
  box-shadow: 6px 6px 0 rgba(47, 42, 40, 0.5);
}

/* ===== 页脚 ===== */
.site-footer {
  background: #2F2A28;
  color: #FAF6F0;
  padding: 64px 0 30px;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    #D4482E 0px, #D4482E 16px,
    #D4A52E 16px, #D4A52E 24px,
    #2E6B80 24px, #2E6B80 32px
  );
}

.site-footer .container {
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand p {
  opacity: 0.6;
  font-size: 0.9rem;
  margin-top: 14px;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #D4A52E;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.footer-col a {
  color: rgba(250, 246, 240, 0.7);
  text-decoration: none;
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-col a:hover {
  color: #D4A52E;
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(250, 246, 240, 0.15);
  margin-top: 44px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.82rem;
  opacity: 0.6;
}

/* ===== 工具类 ===== */
.text-accent {
  color: #D4482E;
  font-weight: 700;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  font-size: 1rem;
  line-height: 1.8;
}

.mt-0 {
  margin-top: 0 !important;
}

.mb-0 {
  margin-bottom: 0 !important;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: #FAF6F0;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 3px solid #2F2A28;
    box-shadow: 0 10px 30px rgba(47, 42, 40, 0.12);
    z-index: 99;
  }

  .main-nav.open a {
    padding: 8px 0;
    font-size: 1.05rem;
    border-bottom: 1px dashed rgba(47, 42, 40, 0.12);
  }

  .main-nav.open a.nav-cta {
    border-bottom: none;
    text-align: center;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .hero::before {
    width: 100%;
    opacity: 0.4;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-image {
    margin-top: 32px;
  }

  .section {
    padding: 64px 0;
  }

  .category-card, .stat-item, .content-wall-item {
    box-shadow: 4px 4px 0 rgba(47, 42, 40, 0.15);
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .hero h1 {
    font-size: 1.9rem;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .header-inner {
    height: 64px;
  }

  .main-nav.open {
    top: 64px;
  }

  .logo {
    font-size: 1.15rem;
  }

  .logo-icon {
    width: 34px;
    height: 34px;
  }

  .cta-banner {
    padding: 44px 20px;
  }

  .cta-banner h2 {
    font-size: 1.6rem;
  }

  .stat-number {
    font-size: 2.2rem;
  }

  .btn {
    padding: 12px 22px;
    font-size: 0.88rem;
  }
}