/* =========================================================
   风车动漫 · 视觉设计系统
   Style: 奶油风车 · Neo-Paper Pop
   ========================================================= */

:root {
  --bg: #FFF7EA;
  --surface: #FFFFFF;
  --ink: #30514B;
  --primary: #FF6B5B;
  --secondary: #2EC4B6;
  --accent: #FFD166;
  --peach: #FFE9DC;
  --mint: #E5F4F1;
  --shadow: 6px 6px 0 var(--ink);
  --radius: 20px;
}

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  letter-spacing: 0.01em;
}

html { scroll-behavior: smooth; }

::selection {
  background: var(--accent);
  color: var(--ink);
}

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

.section {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.section:nth-child(even) {
  background: var(--mint);
}

/* 导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 247, 234, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--ink);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.logo-icon {
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  overflow: hidden;
  flex-shrink: 0;
}

.logo-icon::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--primary) 0 25%,
    var(--secondary) 0 50%,
    var(--accent) 0 75%,
    var(--peach) 0 100%
  );
  animation: windSpin 8s linear infinite;
}

.logo-icon::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--ink);
  z-index: 1;
}

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

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
  position: relative;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--primary);
  transition: width 0.25s ease;
}

.main-nav a:not(.nav-cta):hover::after {
  width: 100%;
}

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

.nav-cta {
  padding: 10px 22px;
  border-radius: 999px;
  color: #fff !important;
  font-weight: 700;
  background: var(--primary);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--ink);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 2px solid var(--ink);
  border-radius: 10px;
  padding: 6px 12px;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--ink);
  align-items: center;
  justify-content: center;
}

/* Hero */
.hero {
  min-height: 74vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  right: -8%;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    rgba(255, 107, 91, 0.25),
    rgba(46, 196, 182, 0.25),
    rgba(255, 209, 102, 0.35),
    rgba(255, 233, 220, 0.4)
  );
  animation: windSpin 30s linear infinite;
  z-index: 0;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: 999px;
  background: var(--accent);
  border: 2px solid var(--ink);
  margin-bottom: 20px;
  transform: rotate(-2deg);
  box-shadow: 3px 3px 0 var(--ink);
}

.hero h1 {
  font-size: 3.4rem;
  line-height: 1.15;
  margin-bottom: 20px;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.hero h1::after {
  content: ' 🔥';
  font-size: 0.6em;
  vertical-align: middle;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.8;
}

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

.hero-image {
  border-radius: 24px;
  border: 2px solid var(--ink);
  box-shadow: 10px 10px 0 var(--secondary);
  transform: rotate(1.6deg);
  overflow: hidden;
  background: var(--surface);
  animation: float 5s ease-in-out infinite;
}

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

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid var(--ink);
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 4px 4px 0 var(--ink);
  font-family: inherit;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 2px solid var(--ink);
}

.btn-outline:hover {
  background: var(--accent);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: 14px;
  padding: 6px 16px;
  background: var(--secondary);
  color: #fff;
  border: 2px solid var(--ink);
  border-radius: 999px;
  box-shadow: 3px 3px 0 var(--ink);
  text-transform: uppercase;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.section-title::before {
  content: '✦ ';
  color: var(--primary);
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 44px;
  font-size: 1.05rem;
}

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

.category-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px;
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--accent);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  animation: cardAppear 0.5s ease both;
}

.category-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 10px 10px 0 var(--secondary);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: var(--peach);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
}

.category-card:nth-child(2n) .card-icon {
  background: var(--mint);
}

.category-card:nth-child(3n) .card-icon {
  background: #FFF3C9;
}

.card-link {
  font-weight: 800;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--primary);
  border-bottom: 2px dashed var(--primary);
  padding-bottom: 2px;
  transition: border-color 0.2s ease;
}

.card-link:hover {
  border-bottom-style: solid;
}

/* 特性块 */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.feature-image {
  border-radius: 24px;
  border: 2px solid var(--ink);
  box-shadow: 8px 8px 0 var(--primary);
  overflow: hidden;
  transform: rotate(-1.4deg);
}

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

.feature-text {
  padding: 20px 0;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  color: #fff;
  background: var(--secondary);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

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

.stat-item {
  background: var(--surface);
  padding: 28px 20px;
  border-radius: var(--radius);
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--ink);
  transition: transform 0.2s ease;
}

.stat-item:hover {
  transform: rotate(-1deg) scale(1.02);
}

.stat-item:nth-child(1) { background: var(--peach); }
.stat-item:nth-child(2) { background: #FFF3C9; }
.stat-item:nth-child(3) { background: var(--mint); }
.stat-item:nth-child(4) { background: #E2EFFF; }

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.2;
  color: var(--primary);
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-top: 6px;
  font-weight: 600;
}

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

.content-wall-item {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--primary);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.content-wall-item:hover {
  transform: translate(-3px, -3px);
  box-shadow: 10px 10px 0 var(--secondary);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-bottom: 2px solid var(--ink);
}

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

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 8px;
}

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

.faq-item {
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: 16px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--secondary);
  transition: transform 0.2s ease;
}

.faq-item:hover {
  transform: translateX(4px);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--primary);
  transition: transform 0.2s ease;
}

.faq-item.open .faq-question::after {
  content: '–';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  opacity: 0.75;
  line-height: 1.8;
}

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

.faq-item.open {
  background: var(--mint);
}

/* CTA横幅 */
.cta-banner {
  background: var(--secondary);
  padding: 64px 24px;
  text-align: center;
  margin: 0 auto;
  max-width: 1200px;
  border-radius: 32px;
  color: #fff;
  border: 2px solid var(--ink);
  box-shadow: 10px 10px 0 var(--ink);
  position: relative;
  overflow: hidden;
}

.cta-banner::before,
.cta-banner::after {
  content: '';
  position: absolute;
  width: 160px;
  height: 160px;
  background: var(--accent);
  opacity: 0.15;
  border-radius: 50%;
}

.cta-banner::before {
  top: -50px;
  left: -30px;
}

.cta-banner::after {
  right: -30px;
  bottom: -60px;
  width: 240px;
  height: 240px;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  margin-bottom: 14px;
  font-weight: 900;
}

.cta-banner p {
  opacity: 0.85;
  max-width: 500px;
  margin: 0 auto 30px;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--ink) !important;
  border-color: var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
}

.cta-banner .btn-primary:hover {
  box-shadow: 6px 6px 0 var(--ink);
}

/* 页脚 */
.site-footer {
  background: var(--peach);
  padding: 56px 0 28px;
  border-top: 2px solid var(--ink);
  margin-top: 80px;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
}

.footer-brand {
  font-weight: 800;
  font-size: 1.2rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  font-weight: 800;
  border-bottom: 2px dashed var(--ink);
  padding-bottom: 6px;
  display: inline-block;
}

.footer-col a {
  text-decoration: none;
  color: var(--ink);
  opacity: 0.7;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.footer-col a:hover {
  opacity: 1;
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(48, 81, 75, 0.25);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
}

/* 工具类 */
.text-accent {
  color: var(--primary);
  font-weight: 800;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  font-size: 1.05rem;
}

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

/* 动画 */
@keyframes windSpin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(1.6deg);
  }
  50% {
    transform: translateY(-12px) rotate(1.6deg);
  }
}

@keyframes cardAppear {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 响应式 */
@media (max-width: 900px) {
  .hero h1 {
    font-size: 2.4rem;
  }

  .hero .container {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
  }

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

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

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg);
    border-bottom: 2px solid var(--ink);
    padding: 24px;
    gap: 18px;
    box-shadow: 6px 6px 0 rgba(48, 81, 75, 0.2);
  }

  .main-nav.open a {
    font-size: 1rem;
    padding: 10px 0;
  }

  .main-nav.open .nav-cta {
    text-align: center;
    justify-content: center;
  }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: left;
  }

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

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

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

  .section {
    padding: 64px 0;
  }

  .cta-banner {
    border-radius: 24px;
    margin: 0 16px;
  }
}

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

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

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

  .hero h1 {
    font-size: 1.8rem;
  }

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

  .container {
    padding: 0 18px;
  }

  .header-inner {
    padding: 0 18px;
  }
}