/* =========================================
   🎡 风车动漫 · 纸风车设计系统
   "Paper Windmill" — 暖纸 × 风车 × 转动叙事
   ========================================= */

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

:root {
  /* 风车暖纸色彩体系 */
  --paper: #FAF6EF;
  --paper-deep: #F2EBDD;
  --paper-light: #FFFDF8;
  --ink: #3D362C;
  --ink-soft: #6B6258;
  --coral: #EA5B3C;
  --coral-deep: #D4472A;
  --teal: #137C6B;
  --teal-light: #DCEFEA;
  --gold: #EBA63A;
  --gold-light: #FDF0D8;
  --line: #E7DEC9;
  --shadow-warm: 8px 8px 0 rgba(61, 54, 44, 0.06);
  --shadow-float: 0 16px 40px rgba(61, 54, 44, 0.10);
  --radius: 18px;
  --radius-sm: 10px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 15% 90%, rgba(234, 91, 60, 0.05) 0%, transparent 35%),
    radial-gradient(circle at 85% 10%, rgba(18, 124, 107, 0.05) 0%, transparent 35%),
    radial-gradient(circle at 50% 50%, rgba(235, 166, 58, 0.03) 0%, transparent 60%);
  overflow-x: hidden;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--coral);
  color: #fff;
}

/* 自定义滚动条 — 暖色系 */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper-deep); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--coral), var(--gold));
  border-radius: 10px;
  border: 2px solid var(--paper-deep);
}

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

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

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

/* =========================================
   头部导航 — 暖纸毛玻璃
   ========================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 246, 239, 0.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s ease;
}

.site-header:hover {
  box-shadow: 0 4px 30px rgba(61, 54, 44, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Logo — 旋转风车图标 */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
  position: relative;
  z-index: 1;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--coral) 0 18deg,
    transparent 18deg 90deg,
    var(--teal) 90deg 108deg,
    transparent 108deg 180deg,
    var(--coral) 180deg 198deg,
    transparent 198deg 270deg,
    var(--gold) 270deg 288deg,
    transparent 288deg 360deg
  );
  animation: windmill-spin 8s linear infinite;
  position: relative;
  box-shadow: 0 2px 12px rgba(234, 91, 60, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-icon::after {
  content: '';
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--paper);
  border-radius: 50%;
  box-shadow: 0 0 0 2.5px var(--coral);
}

/* 导航菜单 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 6px 0;
  position: relative;
  transition: color 0.25s ease;
  letter-spacing: 0.02em;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--coral), var(--gold));
  border-radius: 2px;
  transition: width 0.35s ease;
}

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

.main-nav a:hover::after {
  width: 100%;
}

/* 导航CTA */
.nav-cta {
  background: linear-gradient(135deg, var(--coral) 0%, var(--coral-deep) 100%);
  border-radius: 50px;
  padding: 9px 24px !important;
  color: #fff !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 14px rgba(234, 91, 60, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 20px rgba(234, 91, 60, 0.4);
  color: #fff !important;
}

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

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper-light);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  transition: all 0.3s;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.3s;
}

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

.menu-toggle:hover span {
  background: var(--coral);
}

/* =========================================
   首页 Hero — 转动的天空
   ========================================= */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

/* 巨型风车旋转背景 */
.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  right: -120px;
  transform: translateY(-50%);
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    rgba(234, 91, 60, 0.10) 0 22deg,
    transparent 22deg 90deg,
    rgba(18, 124, 107, 0.10) 90deg 112deg,
    transparent 112deg 180deg,
    rgba(234, 91, 60, 0.10) 180deg 202deg,
    transparent 202deg 270deg,
    rgba(235, 166, 58, 0.10) 270deg 292deg,
    transparent 292deg 360deg
  );
  animation: windmill-spin 30s linear infinite;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: -80px;
  right: 10%;
  width: 120px;
  height: 120px;
  border: 2px dashed rgba(234, 91, 60, 0.15);
  border-radius: 50%;
  animation: windmill-spin 20s linear infinite reverse;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 680px;
  animation: float-up 6s ease-in-out infinite;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  background: var(--teal-light);
  color: var(--teal);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
  border: 1px solid rgba(18, 124, 107, 0.1);
}

.hero-eyebrow::before {
  content: '';
  width: 7px;
  height: 7px;
  background: var(--coral);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}

.hero h1 {
  font-size: clamp(2.6rem, 5.5vw, 4.4rem);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--ink);
}

.hero h1 strong {
  color: var(--coral);
  position: relative;
  font-weight: 800;
}

.hero h1 strong::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: var(--gold-light);
  z-index: -1;
  border-radius: 4px;
}

.hero p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 560px;
  margin-bottom: 36px;
  border-left: 4px solid var(--gold);
  padding-left: 20px;
}

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

/* Hero 图片风车装饰 */
.hero-image {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-float);
  background: linear-gradient(135deg, #E0F0EC 0%, #FDF0D8 100%);
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(1.2deg);
  transition: transform 0.5s ease;
  border: 1px solid rgba(18, 124, 107, 0.1);
}

.hero-image::before {
  content: '';
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--coral) 0 22deg,
    transparent 22deg 90deg,
    var(--teal) 90deg 112deg,
    transparent 112deg 180deg,
    var(--gold) 180deg 202deg,
    transparent 202deg 270deg,
    var(--coral) 270deg 292deg,
    transparent 292deg 360deg
  );
  animation: windmill-spin 10s linear infinite;
  opacity: 0.7;
  position: absolute;
}

.hero-image::after {
  content: '';
  position: absolute;
  top: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border: 3px dashed rgba(234, 91, 60, 0.25);
  border-radius: 50%;
  animation: windmill-spin 15s linear infinite reverse;
}

.hero-image:hover {
  transform: rotate(0deg) scale(1.01);
}

.hero-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  position: relative;
  z-index: 1;
  opacity: 0.9;
  transition: transform 0.5s ease;
}

.hero-image:hover img {
  transform: scale(1.03);
}

/* =========================================
   按钮
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--coral) 0%, var(--coral-deep) 100%);
  color: #fff;
  box-shadow: 0 4px 18px rgba(234, 91, 60, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(234, 91, 60, 0.35);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--teal);
  color: var(--teal);
}

.btn-outline:hover {
  background: var(--teal);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(18, 124, 107, 0.25);
}

/* =========================================
   标签 / 标题
   ========================================= */
.section-label {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  background: var(--teal-light);
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 14px;
  border: 1px solid rgba(18, 124, 107, 0.1);
}

.section-title {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  color: var(--ink);
  position: relative;
}

.section-desc {
  max-width: 600px;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 44px;
}

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

.category-card {
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  box-shadow: var(--shadow-warm);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

/* 顶部彩色渐变条 */
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--coral), var(--gold), var(--teal));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.category-card:hover {
  transform: translateY(-6px) rotate(-1.2deg);
  box-shadow: var(--shadow-float);
  border-color: transparent;
}

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

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--teal-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 18px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.card-icon::after {
  content: '';
  position: absolute;
  inset: -5px;
  border: 1px dashed transparent;
  border-radius: 50%;
  transition: border-color 0.4s;
}

.category-card:hover .card-icon {
  background: var(--coral);
  transform: rotate(180deg);
}

.category-card:hover .card-icon::after {
  border-color: rgba(234, 91, 60, 0.3);
  animation: windmill-spin 4s linear infinite;
}

.category-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--ink);
}

.category-card p {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 18px;
  line-height: 1.6;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--coral);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s ease;
}

.card-link::after {
  content: '→';
  transition: transform 0.3s ease;
}

.card-link:hover::after {
  transform: translateX(5px);
}

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

.feature-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-float);
  position: relative;
  background: linear-gradient(135deg, var(--teal-light), var(--gold-light));
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(18, 124, 107, 0.08);
}

.feature-image::before {
  content: '';
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--coral) 0 20deg,
    transparent 20deg 90deg,
    var(--teal) 90deg 110deg,
    transparent 110deg 180deg,
    var(--gold) 180deg 200deg,
    transparent 200deg 270deg,
    var(--coral) 270deg 290deg,
    transparent 290deg 360deg
  );
  animation: windmill-spin 8s linear infinite;
  opacity: 0.6;
}

.feature-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

.feature-text {
  position: relative;
}

/* 特性文本上方的旋转风车装饰 */
.feature-text::before {
  content: '';
  display: block;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--coral) 0 20deg,
    transparent 20deg 90deg,
    var(--teal) 90deg 110deg,
    transparent 110deg 180deg,
    var(--gold) 180deg 200deg,
    transparent 200deg 270deg,
    var(--coral) 270deg 290deg,
    transparent 290deg 360deg
  );
  animation: windmill-spin 10s linear infinite;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(234, 91, 60, 0.15);
}

.feature-text h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--ink);
}

.feature-text p {
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 16px;
}

.feature-list {
  list-style: none;
  margin-top: 8px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  font-size: 0.92rem;
  border-bottom: 1px dashed var(--line);
  transition: padding-left 0.3s ease;
}

.feature-list li:hover {
  padding-left: 6px;
  color: var(--coral);
}

.feature-list li::before {
  content: '✓';
  font-weight: 700;
  color: var(--teal);
  background: var(--teal-light);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

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

.stat-item {
  padding: 36px 20px;
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-warm);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  height: 4px;
  background: linear-gradient(90deg, var(--coral), var(--gold));
  border-radius: 0 0 6px 6px;
  opacity: 0;
  transition: opacity 0.4s;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: -30px;
  right: -30px;
  width: 70px;
  height: 70px;
  border: 2px solid var(--teal-light);
  border-radius: 50%;
  transition: transform 0.4s ease;
}

.stat-item:hover {
  transform: translateY(-4px) rotate(0.5deg);
  box-shadow: var(--shadow-float);
}

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

.stat-item:hover::after {
  transform: rotate(90deg);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--coral);
  line-height: 1.2;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.stat-number::after {
  content: '+';
}

.stat-label {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-top: 8px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

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

.content-wall-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-light);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  box-shadow: 0 4px 12px rgba(61, 54, 44, 0.03);
}

.content-wall-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--coral), var(--gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2;
}

.content-wall-item:hover {
  transform: translateY(-6px) scale(1.01) rotate(0.3deg);
  box-shadow: var(--shadow-float);
  border-color: transparent;
}

.content-wall-item:hover::after {
  transform: scaleX(1);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
  background: var(--teal-light);
}

.content-wall-item:hover img {
  transform: scale(1.06);
}

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

.content-wall-body h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--ink);
  transition: color 0.3s;
}

.content-wall-item:hover .content-wall-body h4 {
  color: var(--coral);
}

.content-wall-body p {
  font-size: 0.85rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

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

.faq-item {
  border: 1px solid var(--line);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--paper-light);
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(61, 54, 44, 0.03);
}

.faq-item:hover {
  border-color: rgba(234, 91, 60, 0.4);
  box-shadow: 0 4px 16px rgba(234, 91, 60, 0.08);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink);
  font-size: 0.95rem;
  gap: 16px;
  user-select: none;
}

.faq-item .faq-question::after {
  content: '';
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--teal-light);
  position: relative;
  flex-shrink: 0;
  transition: transform 0.35s ease, background 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-item .faq-question::before {
  content: '+';
  font-size: 1rem;
  font-weight: 400;
  color: var(--teal);
  position: absolute;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  transition: transform 0.35s ease, color 0.3s;
  z-index: 1;
}

.faq-item.open .faq-question::before {
  transform: translateY(-50%) rotate(45deg);
  color: var(--coral);
}

.faq-item.open .faq-question::after {
  background: var(--coral);
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  color: var(--ink-soft);
  line-height: 1.7;
  font-size: 0.92rem;
  border-top: 1px dashed var(--line);
  padding-top: 14px;
  opacity: 0.9;
}

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

/* =========================================
   CTA 横幅 — 珊瑚落日
   ========================================= */
.cta-banner {
  padding: 68px 48px;
  text-align: center;
  border-radius: 28px;
  color: #fff;
  background: linear-gradient(135deg, var(--coral) 0%, var(--coral-deep) 50%, #B33D24 130%);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(234, 91, 60, 0.35);
}

/* 旋转圆环装饰 */
.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 220px;
  height: 220px;
  border: 3px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  animation: windmill-spin 18s linear infinite;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -70px;
  left: 12%;
  width: 180px;
  height: 180px;
  border: 3px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  animation: windmill-spin 24s linear infinite reverse;
  border-style: dashed;
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(1.6rem, 2.5vw, 2.3rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  position: relative;
  z-index: 1;
  margin-bottom: 28px;
  font-size: 1rem;
  line-height: 1.7;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--coral-deep);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 1;
  font-weight: 700;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  color: var(--coral-deep);
}

/* =========================================
   页脚 — 暖纸延展
   ========================================= */
.site-footer {
  background: var(--paper-deep);
  border-top: 1px solid var(--line);
  padding: 64px 0 28px;
  margin-top: 80px;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--coral) 0 12px,
    var(--gold) 12px 24px,
    var(--teal) 24px 36px,
    transparent 36px 48px
  );
  opacity: 0.3;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand {
  padding-right: 32px;
}

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--ink);
  letter-spacing: 0.03em;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--coral), var(--gold));
  border-radius: 2px;
}

.footer-col a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.85rem;
  display: block;
  padding: 5px 0;
  transition: color 0.2s, padding-left 0.2s ease;
}

.footer-col a:hover {
  color: var(--coral);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(61, 54, 44, 0.1);
  margin-top: 44px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* =========================================
   工具类
   ========================================= */
.text-accent {
  color: var(--coral);
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.8;
}

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

/* =========================================
   动画关键帧
   ========================================= */
@keyframes windmill-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(234, 91, 60, 0.4);
  }
  50% {
    opacity: 0.6;
    transform: scale(0.8);
    box-shadow: 0 0 0 6px rgba(234, 91, 60, 0);
  }
}

@keyframes float-up {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* =========================================
   响应式
   ========================================= */
@media (max-width: 992px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-image {
    min-height: 240px;
  }
  .feature-block {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .hero { padding: 100px 0 60px; min-height: auto; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 0.95rem; }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .feature-image { min-height: 200px; }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-number { font-size: 2rem; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }

  /* 移动导航 */
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: var(--paper-light);
    padding: 20px 24px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 40px rgba(61, 54, 44, 0.08);
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    border-radius: 0 0 20px 20px;
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav a {
    font-size: 1rem;
    padding: 8px 0;
  }
  .main-nav a::after { display: none; }
  .nav-cta {
    width: 100%;
    text-align: center;
    padding: 12px !important;
  }

  .menu-toggle {
    display: flex;
  }

  .cta-banner {
    padding: 48px 28px;
    border-radius: 20px;
  }
}

@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;
    width: 100%;
  }
  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }
  .hero-image {
    min-height: 180px;
  }
  .hero-image::before {
    width: 100px;
    height: 100px;
  }
  .section-title {
    font-size: 1.4rem;
  }
  .stat-item {
    padding: 24px 16px;
  }
  .stat-number {
    font-size: 1.8rem;
  }
  .cta-banner h2 {
    font-size: 1.4rem;
  }
  .footer-bottom {
    font-size: 0.75rem;
  }
}