/* ============================================
   爱看机器人 — 独特设计系统
   风格：编辑式新粗野主义（Neo-Brutalist Editorial）
   配色：奶油白 + 深森林绿 + 珊瑚红 + 芥末黄
   ============================================ */

/* 基础重置 */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: #FAF7F1;
  color: #1B3A34;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: #F2C94C;
  color: #1B3A34;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: #F4EEE3;
}

::-webkit-scrollbar-thumb {
  background: #1B3A34;
  border-radius: 0;
  border: 2px solid #F4EEE3;
}

::-webkit-scrollbar-thumb:hover {
  background: #E85D4A;
}

/* 核心布局 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: #F4EEE3;
}

.section::after {
  content: '';
  position: absolute;
  bottom: 16px;
  left: 24px;
  width: 32px;
  height: 32px;
  border-left: 2px solid #E85D4A;
  border-bottom: 2px solid #E85D4A;
  opacity: 0.4;
  pointer-events: none;
}

/* ===================== 导航 ===================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 247, 241, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 2px solid #1B3A34;
}

.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: 1.2rem;
  text-decoration: none;
  color: #1B3A34;
  letter-spacing: -0.02em;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.8;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px 4px 12px 4px;
  background: #E85D4A;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  position: relative;
  overflow: hidden;
  box-shadow: 3px 3px 0 #1B3A34;
}

.logo-icon::before {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  background: #F2C94C;
  right: -2px;
  top: -2px;
  border-radius: 50%;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: #1B3A34;
  padding: 8px 18px;
  position: relative;
  transition: color 0.2s;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 4px;
  height: 3px;
  background: #E85D4A;
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.main-nav a:not(.nav-cta):hover {
  color: #E85D4A;
}

.main-nav a:not(.nav-cta):hover::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: 10px 26px;
  background: #E85D4A;
  color: #ffffff !important;
  border-radius: 50px;
  font-weight: 700;
  box-shadow: 0 4px 0 #B63A28;
  transition: transform 0.2s, box-shadow 0.2s;
  margin-left: 12px;
}

.nav-cta:hover {
  transform: translateY(2px);
  box-shadow: 0 2px 0 #B63A28;
  color: #ffffff !important;
}

.menu-toggle {
  display: none;
}

/* ===================== Hero ===================== */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  position: relative;
  background:
    linear-gradient(90deg, rgba(27, 58, 52, 0.045) 1px, transparent 1px),
    linear-gradient(rgba(27, 58, 52, 0.045) 1px, transparent 1px),
    #FAF7F1;
  background-size: 36px 36px;
  padding: 140px 0 90px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -40px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(242, 201, 76, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -60px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(232, 93, 74, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 7px 18px 7px 22px;
  border-radius: 50px;
  background: #1B3A34;
  color: #F2C94C;
  margin-bottom: 24px;
  position: relative;
}

.hero-eyebrow::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #E85D4A;
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
  color: #1B3A34;
}

.hero h1 .text-accent {
  position: relative;
  background: linear-gradient(transparent 60%, rgba(242, 201, 76, 0.6) 60%);
  padding: 0 4px;
  border-radius: 2px;
}

.hero p {
  font-size: 1.12rem;
  opacity: 0.72;
  max-width: 560px;
  margin-bottom: 38px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: 20px 6px 20px 6px;
  overflow: hidden;
  border: 3px solid #1B3A34;
  box-shadow: 12px 12px 0 #F2C94C;
  position: relative;
  animation: float 5s ease-in-out infinite;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ===================== 按钮 ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.btn-primary {
  background: #E85D4A;
  color: #ffffff;
  box-shadow: 0 6px 0 #B63A28, 0 12px 28px rgba(232, 93, 74, 0.28);
}

.btn-primary:hover {
  transform: translateY(3px);
  box-shadow: 0 3px 0 #B63A28, 0 8px 20px rgba(232, 93, 74, 0.28);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 2px solid #1B3A34;
  color: #1B3A34;
}

.btn-outline:hover {
  background: #1B3A34;
  color: #FAF7F1;
  transform: translateY(-2px);
  box-shadow: 4px 4px 0 rgba(232, 93, 74, 0.6);
}

/* ===================== 标签/标题 ===================== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: #E85D4A;
}

.section-label::before {
  content: '';
  width: 20px;
  height: 3px;
  background: #E85D4A;
  border-radius: 2px;
}

.section-label::after {
  content: '·';
  font-size: 1.4rem;
  color: #F2C94C;
  line-height: 1;
}

.section-title {
  font-size: clamp(1.9rem, 3.8vw, 2.9rem);
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 16px;
  color: #1B3A34;
}

.section-desc {
  max-width: 620px;
  opacity: 0.7;
  margin-bottom: 48px;
  line-height: 1.7;
}

/* ===================== 卡片网格 ===================== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 32px;
}

.category-card {
  border-radius: 6px 22px 6px 22px;
  padding: 32px 30px;
  background: #FFFFFF;
  border: 2px solid #1B3A34;
  box-shadow: 7px 7px 0 rgba(27, 58, 52, 0.85);
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.25s;
  position: relative;
}

.category-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 13px 13px 0 rgba(232, 93, 74, 0.85);
}

.category-card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.category-card p {
  font-size: 0.9rem;
  opacity: 0.68;
  margin-bottom: 18px;
  line-height: 1.6;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px 4px 14px 4px;
  background: #F2C94C;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  border: 2px solid #1B3A34;
  box-shadow: 3px 3px 0 #1B3A34;
  color: #1B3A34;
}

.category-card:nth-child(2) .card-icon {
  background: #A8D4C4;
}

.category-card:nth-child(3) .card-icon {
  background: #F5A481;
}

.category-card:nth-child(4) .card-icon {
  background: #C9B6E4;
}

.card-link {
  font-weight: 800;
  font-size: 0.85rem;
  text-decoration: none;
  color: #E85D4A;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}

.card-link::after {
  content: '→';
  font-size: 1rem;
}

.card-link:hover {
  gap: 10px;
}

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

.feature-image {
  border-radius: 18px 4px 18px 4px;
  overflow: hidden;
  border: 2px solid #1B3A34;
  box-shadow: 10px 10px 0 #F2C94C;
  position: relative;
}

.feature-image img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.feature-image:hover img {
  transform: scale(1.04);
}

.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1.25;
}

.feature-text > p {
  opacity: 0.72;
  margin-bottom: 24px;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
  display: grid;
  gap: 4px;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 0.95rem;
}

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  background: #E85D4A;
  color: #fff;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  border: 2px solid #1B3A34;
  box-shadow: 1px 1px 0 #1B3A34;
}

/* ===================== 数据条 ===================== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 38px 20px;
  border-radius: 20px 6px 20px 6px;
  background: #FFFFFF;
  border: 2px dashed #1B3A34;
  position: relative;
  transition: transform 0.25s, border-style 0.2s, background 0.3s, color 0.3s;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 2px;
  background: #E85D4A;
  opacity: 0;
  transition: opacity 0.3s;
}

.stat-item:hover {
  transform: translateY(-6px);
  border-style: solid;
  background: #1B3A34;
  color: #FAF7F1;
}

.stat-item:hover::before {
  opacity: 1;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: #E85D4A;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  transition: color 0.3s;
}

.stat-item:hover .stat-number {
  color: #F2C94C;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.62;
  margin-top: 10px;
  font-weight: 500;
  transition: opacity 0.3s;
}

.stat-item:hover .stat-label {
  opacity: 0.9;
}

/* ===================== 内容墙 ===================== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 32px;
}

.content-wall-item {
  border-radius: 16px 4px 16px 4px;
  overflow: hidden;
  background: #FFFFFF;
  border: 2px solid #1B3A34;
  box-shadow: 6px 6px 0 rgba(232, 93, 74, 0.7);
  transition: transform 0.25s, box-shadow 0.25s;
}

.content-wall-item:hover {
  transform: translate(-4px, -4px) rotate(0.4deg);
  box-shadow: 11px 11px 0 rgba(27, 58, 52, 0.85);
}

.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  display: block;
  border-bottom: 2px solid #1B3A34;
}

.content-wall-body {
  padding: 22px 24px 24px;
}

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.content-wall-body p {
  font-size: 0.88rem;
  opacity: 0.68;
  line-height: 1.6;
}

.content-wall-body .tag {
  display: inline-block;
  background: #F2C94C;
  color: #1B3A34;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 4px 14px;
  border-radius: 30px;
  margin-top: 12px;
  border: 1.5px solid #1B3A34;
  box-shadow: 2px 2px 0 #1B3A34;
}

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

.faq-item {
  background: #FFFFFF;
  border: 2px solid #1B3A34;
  border-radius: 14px 4px 14px 4px;
  margin-bottom: 16px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.3s;
}

.faq-item:hover {
  border-color: #E85D4A;
  box-shadow: 4px 4px 0 rgba(232, 93, 74, 0.3);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 800;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #1B3A34;
  letter-spacing: -0.01em;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.6rem;
  font-weight: 400;
  line-height: 1;
  color: #E85D4A;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

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

.faq-item .faq-answer {
  display: none;
  padding: 14px 24px 22px;
  opacity: 0.72;
  line-height: 1.7;
  font-size: 0.95rem;
  border-top: 1px dashed rgba(27, 58, 52, 0.15);
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeSlide 0.3s ease;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 0.72; transform: translateY(0); }
}

/* ===================== CTA横幅 ===================== */
.cta-banner {
  padding: 68px 32px;
  text-align: center;
  border-radius: 24px 6px 24px 6px;
  background: linear-gradient(135deg, #F2C94C 0%, #F5A481 60%, #E85D4A 100%);
  color: #1B3A34;
  border: 3px solid #1B3A34;
  box-shadow: 10px 10px 0 #1B3A34;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '✦';
  position: absolute;
  font-size: 6rem;
  color: rgba(255, 255, 255, 0.3);
  top: -30px;
  right: 30px;
  transform: rotate(15deg);
  line-height: 1;
  pointer-events: none;
}

.cta-banner::after {
  content: '✦';
  position: absolute;
  font-size: 3rem;
  color: rgba(27, 58, 52, 0.12);
  bottom: 10px;
  left: 40px;
  transform: rotate(-20deg);
  line-height: 1;
  pointer-events: none;
}

.cta-banner h2 {
  color: #1B3A34;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  max-width: 480px;
  margin: 0 auto 30px;
  font-size: 1rem;
  opacity: 0.75;
  position: relative;
  z-index: 2;
  font-weight: 500;
}

.cta-banner .btn-primary {
  background: #1B3A34;
  color: #F2C94C;
  box-shadow: 0 5px 0 #0D1F1A, 0 10px 24px rgba(27, 58, 52, 0.25);
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  transform: translateY(3px);
  box-shadow: 0 2px 0 #0D1F1A, 0 6px 16px rgba(27, 58, 52, 0.2);
  color: #F2C94C;
}

/* ===================== 页脚 ===================== */
.site-footer {
  padding: 72px 0 32px;
  background: #F4EEE3;
  border-top: 3px solid #1B3A34;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -3px;
  left: 0;
  width: 140px;
  height: 3px;
  background: #E85D4A;
}

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

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-top: 14px;
  max-width: 280px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 20px;
  color: #1B3A34;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: #E85D4A;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.footer-col a {
  text-decoration: none;
  color: rgba(27, 58, 52, 0.75);
  font-size: 0.9rem;
  transition: color 0.2s, padding-left 0.2s;
  font-weight: 500;
}

.footer-col a:hover {
  color: #E85D4A;
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(27, 58, 52, 0.15);
  margin-top: 48px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* ===================== 工具类 ===================== */
.text-accent {
  color: #E85D4A;
}

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

.seo-description {
  max-width: 640px;
  margin: 0 auto 48px;
  opacity: 0.7;
  text-align: center;
  line-height: 1.7;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ===================== 响应式 ===================== */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

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

  .section {
    padding: 72px 0;
  }

  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    background: #FAF7F1;
    border: 2px solid #1B3A34;
    border-radius: 12px 4px 12px 4px;
    cursor: pointer;
    font-size: 1.4rem;
    color: #1B3A34;
    box-shadow: 3px 3px 0 #1B3A34;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: #FAF7F1;
    border-bottom: 2px solid #1B3A34;
    padding: 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    box-shadow: 8px 12px 0 rgba(27, 58, 52, 0.1);
  }

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

  .main-nav a {
    display: block;
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    border-bottom: 1px dashed rgba(27, 58, 52, 0.12);
  }

  .main-nav a:not(.nav-cta)::after {
    display: none;
  }

  .nav-cta {
    margin: 12px 0 0;
    text-align: center;
  }

  .hero {
    padding-top: 110px;
    background-size: 28px 28px;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .hero-image {
    margin-top: 40px;
  }
}

@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;
  }

  .section {
    padding: 56px 0;
  }

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

  .feature-image img {
    height: 240px;
  }

  .cta-banner {
    padding: 48px 20px;
  }

  .logo {
    font-size: 1rem;
  }

  .logo-icon {
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }
}