/* ================================
   宠王子·PetKing 首页样式
   主色调：#E2211C（红色）
   辅助色调：#CC853C（金黄）
   响应式：Mobile First
   ================================ */

/* ---- CSS 变量 ---- */
:root {
  /* 主色调：红色（占页面 70-80%） */
  --primary: #E7161A;
  --primary-light: #F0524C;
  --primary-soft: #FADCD9;
  --primary-dark: #B51B16;
  --primary-900: #7C110D;

  /* 辅助色调：金黄（占页面 20-30%） */
  --secondary: #CC853C;
  --secondary-light: #E8A96A;
  --secondary-soft: #F5D9B8;
  --secondary-dark: #A6682E;

  --bg: #FAFAF8;
  --bg-warm: #F7F3EE;
  --surface: #FFFFFF;
  --text: #1F1F1F;
  --text-secondary: #5A5A5A;
  --text-muted: #8A8A8A;
  --border: #E8E2DA;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-14: 3.5rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 2px 4px rgba(31, 31, 31, 0.05);
  --shadow-md: 0 8px 24px rgba(31, 31, 31, 0.08);
  --shadow-lg: 0 20px 48px rgba(31, 31, 31, 0.12);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  --header-height: 72px;
  --header-height-mobile: 64px;
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  z-index: 10000;
  background: var(--primary);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 0 0 var(--radius-md) 0;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
}

/* ---- 容器 ---- */
.section {
  position: relative;
  min-height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--header-height-mobile) + var(--space-6)) var(--space-5) var(--space-12);
}

.section-content {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
}

.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--secondary);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: var(--space-6);
}

.section-header.light .section-title,
.section-header.light .section-subtitle {
  color: #fff;
}

.section-header.light .section-eyebrow {
  color: var(--secondary-light);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 48ch;
}

.section-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--primary);
  font-weight: 600;
  transition: gap 0.2s var(--ease-out), color 0.2s;
}

.section-link:hover,
.section-link:focus {
  color: var(--primary-dark);
  gap: var(--space-3);
}

.icon-arrow-sm {
  width: 1.25em;
  height: 1.25em;
  fill: currentColor;
}

/* ---- 导航栏 ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height-mobile);
  background: #E7161A;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  transition: background 0.3s, box-shadow 0.3s, height 0.3s;
}

.site-header.scrolled {
  background: #E7161A;
  box-shadow: var(--shadow-sm);
}

.header-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
}

.brand-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.brand-dot {
  color: var(--primary-light);
}

/* 移动端：logo 靠左，品牌文字绝对定位居中（与右侧汉堡按钮三段式分布） */
.brand-name {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
}

.main-nav {
  position: relative;
  margin-left: auto;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  border-radius: var(--radius-sm);
}

.nav-toggle:hover,
.nav-toggle:focus {
  background: var(--bg-warm);
}

.hamburger-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s var(--ease-out), opacity 0.25s;
}

.nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-menu {
  position: fixed;
  top: var(--header-height-mobile);
  right: 0;
  width: min(320px, 85vw);
  /* 100dvh 动态视口高度，避免移动端浏览器地址栏遮挡抽屉底部（语言切换） */
  height: calc(100vh - var(--header-height-mobile));
  height: calc(100dvh - var(--header-height-mobile));
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  transform: translateX(110%);
  transition: transform 0.35s var(--ease-out);
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  gap: var(--space-2);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.nav-menu.open {
  transform: translateX(0);
}

.nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s, background 0.2s;
}

/* 英文模式：英文标签较长，导航字号缩小避免拥挤换行 */
html[lang="en"] .nav-link {
  font-size: 0.9rem;
}

.nav-link:hover,
.nav-link:focus,
.nav-link.active {
  color: var(--primary);
  background: var(--bg-warm);
}

.nav-link.active {
  font-weight: 600;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: background 0.2s, color 0.2s;
}

.lang-switch:hover,
.lang-switch:focus {
  background: var(--bg-warm);
  color: var(--primary);
}

.icon-globe {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* ---- 语言切换下拉 ---- */
.lang-item {
  position: relative;
  margin-left: var(--space-3);
}

.lang-switch .icon-chevron {
  width: 16px;
  height: 16px;
  opacity: 0.7;
  transition: transform 0.25s var(--ease-out), opacity 0.25s;
}

.lang-item.lang-open > .lang-switch .icon-chevron {
  transform: rotate(180deg);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 132px;
  padding: var(--space-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out),
    visibility 0.25s;
}

.lang-item.lang-open > .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  color: var(--text-secondary);
  text-align: left;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.lang-option:hover,
.lang-option:focus {
  color: var(--primary);
  background: var(--bg-warm);
}

.lang-option.is-active {
  color: var(--primary);
  font-weight: 600;
}

/* 移动端：语言切换默认隐藏，移入导航抽屉后显示 */
.lang-item {
  display: none;
}

/* 移动端：语言切换置于导航抽屉内，紧跟导航项之后展示（不贴底，保证小屏可见可点） */
.nav-menu .lang-item {
  display: block;
  margin-left: 0;
  margin-top: var(--space-2);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

/* 抽屉内语言按钮占满整行，选中态左文字右箭头 */
.nav-menu .lang-switch {
  width: 100%;
  justify-content: space-between;
}

/* 抽屉内下拉改为块级展开，避免被抽屉 overflow 裁剪 */
.nav-menu .lang-dropdown {
  position: static;
  box-shadow: none;
  border: none;
  padding: var(--space-1) 0 0;
}

/* ---- 二级导航 ---- */
.nav-item.has-submenu {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.nav-item.has-submenu > .nav-link {
  flex: 1 1 auto;
}

.submenu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: color 0.2s, background 0.2s;
}

.submenu-toggle:hover,
.submenu-toggle:focus {
  background: var(--bg-warm);
  color: var(--primary);
}

.icon-chevron {
  width: 20px;
  height: 20px;
  fill: currentColor;
  transition: transform 0.25s var(--ease-out);
}

.nav-item.submenu-open > .submenu-toggle .icon-chevron {
  transform: rotate(180deg);
}

.submenu {
  flex-basis: 100%;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease-out);
  padding-left: var(--space-4);
}

.nav-item.submenu-open > .submenu {
  max-height: 320px;
}

.submenu-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  color: var(--text-secondary);
  transition: color 0.2s, background 0.2s;
}

.submenu-link:hover,
.submenu-link:focus {
  color: var(--primary);
  background: var(--bg-warm);
}

/* ---- 全屏滚动容器 ---- */
.scroll-container {
  width: 100%;
}

@media (min-width: 1024px) {
  .scroll-container {
    scroll-snap-type: y mandatory;
    overflow-y: auto;
    height: 100vh;
    scroll-behavior: smooth;
  }

  .section {
    scroll-snap-align: start;
    min-height: 100vh;
    padding-top: calc(var(--header-height) + var(--space-8));
  }
}

/* ---- 第一屏：Hero ---- */
.section-hero {
  padding: 0;
  text-align: center;
  color: #fff;
  overflow: hidden;
}

.video-background {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(135deg, #8E1512 0%, #E7161A 50%, #B51B16 100%);
  background-size: 400% 400%;
  animation: gradient-shift 16s ease infinite;
}

.video-background::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath fill='rgba(255,255,255,0.06)' d='M30 35a6 6 0 1 1-12 0 6 6 0 0 1 12 0zm28 0a6 6 0 1 1-12 0 6 6 0 0 1 12 0zm-14 16a6 6 0 1 1-12 0 6 6 0 0 1 12 0zm28 0a6 6 0 1 1-12 0 6 6 0 0 1 12 0zM44 70c-6 10-18 10-24 0-3-5 2-12 12-12s15 7 12 12z'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  opacity: 0.6;
  animation: float-paws 30s linear infinite;
}

.video-background video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
}

/* .video-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(31, 31, 31, 0.35) 0%,
    rgba(31, 31, 31, 0.45) 50%,
    rgba(31, 31, 31, 0.55) 100%
  );
} */

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: calc(var(--header-height-mobile) + var(--space-8)) var(--space-5) var(--space-12);
}

.hero-tag {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-6);
  backdrop-filter: blur(4px);
}

.hero-title {
  font-size: clamp(2rem, 8vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.04em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  margin-bottom: var(--space-5);
  color: #fff;
}

.hero-title .sep {
  color: var(--secondary-light);
  margin: 0 0.05em;
}

.hero-subtitle {
  font-size: clamp(1rem, 3vw, 1.5rem);
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-8);
  opacity: 0.95;
}

.hero-values {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

.value-pill {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-6);
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.1em;
  backdrop-filter: blur(4px);
  transition: transform 0.2s var(--ease-out), background 0.2s;
}

.value-pill:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.28);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1.05rem;
  box-shadow: 0 8px 24px rgba(226, 33, 28, 0.35);
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s, background 0.25s;
}

.hero-cta:hover,
.hero-cta:focus {
  transform: translateY(-3px);
  background: var(--primary-light);
  box-shadow: 0 12px 32px rgba(226, 33, 28, 0.45);
}

.icon-arrow {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.8);
  opacity: 0;
  animation: fade-in-up 1s ease 1.5s forwards;
}

.mouse {
  width: 22px;
  height: 36px;
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 12px;
  position: relative;
}

.mouse::after {
  content: "";
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 6px;
  background: #fff;
  border-radius: 2px;
  animation: scroll-wheel 1.8s infinite;
}

/* ---- 右侧滚动标识 ---- */
.scroll-indicator {
  position: fixed;
  top: 50%;
  right: clamp(12px, 2vw, 28px);
  transform: translateY(-50%);
  z-index: 50;
  display: none;
  flex-direction: column;
  align-items: flex-end;
  gap: clamp(10px, 1.4vw, 18px);
  padding: 0;
  margin: 0;
}

.scroll-dot {
  --dot-size: 12px;
  position: relative;
  width: var(--dot-size);
  height: var(--dot-size);
  border-radius: 50%;
  background: transparent;
  border: 2px solid rgba(226, 33, 28, 0.55);
  transition: transform 0.3s var(--ease-out), background-color 0.3s var(--ease-out),
    border-color 0.3s var(--ease-out);
}

.scroll-dot::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand);
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.3s var(--ease-out);
}

.scroll-dot:hover {
  border-color: var(--brand);
  transform: scale(1.15);
}

.scroll-dot.is-active {
  border-color: var(--brand);
  transform: scale(1.2);
}

.scroll-dot.is-active::before {
  transform: translate(-50%, -50%) scale(1);
}

.scroll-dot-label {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(8px);
  white-space: nowrap;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--brand);
  background: rgba(255, 255, 255, 0.92);
  padding: 3px 10px;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(108, 75, 42, 0.18);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}

.scroll-dot:hover .scroll-dot-label,
.scroll-dot.is-active .scroll-dot-label {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* ---- 第二屏：我们是谁 ---- */
.section-about {
  background: var(--bg);
}

.about-content {
  display: grid;
  gap: var(--space-10);
  align-items: center;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: var(--space-5);
}

.section-desc.secondary {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.about-media {
  display: flex;
  justify-content: center;
}

.about-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  width: 100%;
  max-width: 520px;
}

.about-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-soft) 0%, var(--bg-warm) 100%);
  color: var(--primary);
}

.base-placeholder svg {
  width: 60%;
  height: 60%;
  opacity: 0.7;
}

.about-card-caption {
  padding: var(--space-5) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.about-card-caption strong {
  color: var(--text);
  font-size: 1.05rem;
}

.about-card-caption span {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ---- 第三屏：我们的优势 ---- */
.section-advantages {
  background: var(--bg-warm);
}

.advantages-grid {
  display: grid;
  gap: var(--space-5);
}

.advantage-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s, border-color 0.3s;
}

.advantage-card:hover,
.advantage-card:focus-within {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-soft);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary-soft) 0%, var(--bg-warm) 100%);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.advantage-icon svg {
  width: 34px;
  height: 34px;
  fill: currentColor;
}

.advantage-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--text);
}

.advantage-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---- 第四屏：产业基地 ---- */
.section-bases {
  background: var(--surface);
}

.bases-layout {
  display: grid;
  gap: var(--space-6);
}

.bases-tabs {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.base-tab {
  text-align: left;
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-left: 3px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}

.base-tab:hover,
.base-tab:focus {
  background: var(--bg-warm);
  color: var(--primary-dark);
}

.base-tab.active {
  background: var(--bg-warm);
  color: var(--primary);
  border-left-color: var(--primary);
  font-weight: 600;
}

.base-panels {
  position: relative;
  background: var(--bg);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  min-height: 340px;
}

.base-panel {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s;
  display: none;
}

.base-panel.active {
  opacity: 1;
  transform: translateY(0);
  display: block;
}

.base-panel[hidden] {
  display: none !important;
}

.base-panel-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--primary-soft);
}

.base-panel p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.base-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}

.base-stats li {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.base-stats strong {
  font-size: 1.5rem;
  color: var(--primary);
}

.base-stats span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ---- 招商合作 ---- */
.section-cooperation {
  background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-dark) 100%);
  color: #fff;
}

.cooperation-content {
  z-index: 2;
}

.cooperation-grid {
  display: grid;
  gap: var(--space-6);
}

.cooperation-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  backdrop-filter: blur(8px);
}

.cooperation-card h3 {
  font-size: 1.35rem;
  margin-bottom: var(--space-5);
  color: #fff;
}

.cooperation-card ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.cooperation-card li {
  position: relative;
  padding-left: var(--space-6);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
}

.cooperation-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-light);
}

.cooperation-card p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s, background 0.2s;
}

.btn:hover,
.btn:focus {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(226, 33, 28, 0.35);
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-light);
  box-shadow: 0 8px 24px rgba(226, 33, 28, 0.45);
}

.cooperation-form {
  display: grid;
  gap: var(--space-4);
}

.cooperation-form label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: -0.5rem;
}

.cooperation-form input,
.cooperation-form textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 0.9375rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.cooperation-form input::placeholder,
.cooperation-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

.cooperation-form input:focus,
.cooperation-form textarea:focus {
  border-color: var(--primary-light);
  background: rgba(255, 255, 255, 0.14);
  box-shadow: 0 0 0 3px rgba(226, 33, 28, 0.25);
}

/* ---- 第五屏：新闻中心 ---- */
.section-news {
  padding: 0;
  background: var(--bg);
}

.news-content {
  padding: calc(var(--header-height-mobile) + var(--space-8)) var(--space-5) var(--space-10);
}

.news-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.news-top .section-header {
  margin-bottom: 0;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.news-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-5);
  align-items: start;
  padding: var(--space-5);
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s, border-color 0.2s;
}

.news-item:hover,
.news-item:focus-within {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-soft);
}

.news-item time {
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 600;
  white-space: nowrap;
}

.news-item h3 {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
}

.news-item a {
  color: var(--text);
  transition: color 0.2s;
}

.news-item a:hover,
.news-item a:focus {
  color: var(--primary);
}

/* ---- 第六屏：底部栏 ---- */
/* ---- 底部栏：居中 · 对称 · 精致（全站统一，与首页一致） ---- */
/* 用 .section.section-footer 提升优先级：阻断媒体查询中 .section 的通用 padding 覆盖 */
.section.section-footer {
  --footer-space-top: 5rem;
  --footer-space-bottom: 2rem;
  /* 覆盖 .section 的 flex 垂直拉伸，footer 按内容自然排布 */
  display: block;
  position: relative;
  background: #E7161A;
  color: #fff;
  min-height: auto;
  padding: var(--footer-space-top) var(--space-5) var(--footer-space-bottom);
  overflow: hidden;
}

/* 顶部居中渐隐分隔线 */
.section-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(1100px, 90%);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232, 169, 106, 0.6), transparent);
}

.footer-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  width: 100%;
  margin-bottom: var(--space-12);
}

/* 品牌在上、二维码在下，纵向居中成一组 */
.footer-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  width: 100%;
}

/* 品牌区：居中对齐 */
.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.footer-logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 76px;
  height: 76px;
  padding: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid #fff;
  box-shadow: 0 10px 30px rgba(232, 169, 106, 0.22);
  margin-bottom: var(--space-2);
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.footer-brand:hover .footer-logo-badge {
  border-color: #fff;
  box-shadow: 0 14px 38px rgba(232, 169, 106, 0.32);
  transform: translateY(-3px);
}

.footer-logo {
  width: 60px;
  height: 60px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.footer-brand-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.footer-brand-name {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff;
  margin: 0;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 1rem;
  letter-spacing: 0.06em;
  margin: 0;
}

/* 导航：全宽居中网格，主菜单与子菜单均居中 */
.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-10) var(--space-6);
  width: 100%;
  max-width: 460px;
  justify-content: center;
  padding: var(--space-4) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-nav-col {
  text-align: center;
}

.footer-nav-col h3 {
  position: relative;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #fff;
  margin: 0 0 var(--space-3);
  padding-bottom: var(--space-1);
}

/* 主菜单标题下方的居中品牌色短分隔线 */
.footer-nav-col h3::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 28px;
  height: 2px;
  border-radius: 2px;
  background: var(--secondary);
}

.footer-nav-col ul {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
}

.footer-nav-col li {
  margin: 0;
}

.footer-nav-col a {
  display: inline-block;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  transition: color 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}

.footer-nav-col a:hover,
.footer-nav-col a:focus {
  color: var(--secondary-light);
  transform: translateY(-2px);
}

.footer-nav-col a.footer-link-more {
  color: #3B82F6;
}

.footer-nav-col a.footer-link-more:hover,
.footer-nav-col a.footer-link-more:focus {
  color: #60A5FA;
}

/* 二维码：居中对齐 */
.footer-qr {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-qr figure {
  text-align: center;
  margin: 0;
}

.qr-placeholder {
  width: 104px;
  height: 104px;
  background: #fff;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  object-fit: contain;
  display: block;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.qr-placeholder::before {
  content: "";
  position: absolute;
  inset: 8px;
  background-image:
    repeating-linear-gradient(0deg, var(--text) 0, var(--text) 2px, transparent 2px, transparent 5px),
    repeating-linear-gradient(90deg, var(--text) 0, var(--text) 2px, transparent 2px, transparent 5px);
  opacity: 0.85;
}

.qr-placeholder::after {
  content: "二维码";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.7);
}

.footer-qr figure:hover .qr-placeholder {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.3);
}

.footer-qr figcaption {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.72);
}

/* 版权：垂直居中 */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.9rem;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.72);
  width: 100%;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-bottom p {
  margin: 0;
}

.footer-icp {
  margin-left: 1.2rem;
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
.footer-icp:hover {
  color: #fff;
  text-decoration: underline;
}

/* 公安备案：图标+文字锁定一行，图标与文字垂直居中，不换行 */
.footer-icp-police {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

/* 公安备案徽章图标：随文字行高缩放，与备案文字对齐 */
.footer-police-icon {
  height: 1.2em;
  width: auto;
  margin-right: 0.4rem;
}

/* 移动端：版权与 ICP 备案一行一个，上下排列 */
@media (max-width: 639px) {
  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
  }

  .footer-icp {
    margin-left: 0;
  }
}

/* 平板及以上：导航展开为 3 列，保持居中对称 */
@media (min-width: 640px) {
  .footer-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: 720px;
  }
}

/* 桌面：品牌+二维码在左，导航在右 */
@media (min-width: 900px) {
  .footer-top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-24);
  }

  /* 左侧：logo + 品牌文字 在上，二维码 在下，纵向成一组，整体左对齐 */
  .footer-head {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: var(--space-5);
    width: auto;
    flex: 0 0 auto;
  }

  /* 品牌：logo 在左，文字在右竖排 */
  .footer-brand {
    flex-direction: row;
    align-items: center;
    text-align: left;
    gap: var(--space-3);
  }

  .footer-brand-text {
    align-items: flex-start;
    text-align: left;
  }

  .footer-logo-badge {
    margin-bottom: 0;
  }

  .footer-qr {
    width: 100%;
    justify-content: flex-end;
    gap: var(--space-4);
  }

  /* 桌面端略缩二维码，让左侧纵向区块与右侧导航高度更接近，排版更平衡 */
  .footer-qr .qr-placeholder {
    width: 92px;
    height: 92px;
  }

  .footer-nav {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    /* 取消固定宽度，让导航填满剩余空间，消除左右之间的大块空白 */
    max-width: none;
    margin-left: auto;
    /* 去掉移动端那条只浮在右侧上方的顶部分隔线，左右才齐 */
    border-top: none;
    padding: 0;
    gap: var(--space-6);
  }
}

/* ---- 动画 ---- */
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scroll-wheel {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(10px); }
}

@keyframes hero-reveal {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes float-paws {
  0% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
  100% { transform: translateY(0); }
}

.hero-tag,
.hero-title,
.hero-subtitle,
.hero-values,
.hero-cta {
  opacity: 0;
  animation: hero-reveal 0.8s var(--ease-out) forwards;
}

.hero-tag { animation-delay: 0.2s; }
.hero-title { animation-delay: 0.4s; }
.hero-subtitle { animation-delay: 0.55s; }
.hero-values { animation-delay: 0.7s; }
.hero-cta { animation-delay: 0.85s; }

/* ---- 响应式：平板 ---- */
@media (min-width: 980px) {
  :root {
    --header-height: 76px;
  }

  .section {
    padding: calc(var(--header-height) + var(--space-8)) var(--space-8) var(--space-16);
  }

  .site-header {
    height: var(--header-height);
  }

  .header-container {
    padding: 0 var(--space-8);
  }

  .brand {
    font-size: 1.4rem;
  }

  .brand-name {
    position: static;
    transform: none;
  }

  .brand-logo {
    width: 44px;
    height: 44px;
  }

  .nav-toggle {
    display: none;
  }

  .main-nav {
    margin-left: 0;
  }

  .nav-menu {
    position: static;
    transform: none;
    flex-direction: row;
    align-items: center;
    width: auto;
    height: auto;
    padding: 0;
    background: transparent;
    box-shadow: none;
    gap: var(--space-1);
    overflow: visible;
  }

  .nav-link {
    padding: var(--space-2) var(--space-3);
    font-size: 0.9375rem;
    background: transparent;
  }

  .nav-link:hover,
  .nav-link:focus,
  .nav-link.active {
    background: var(--bg-warm);
  }

  .lang-switch {
    padding: var(--space-2) var(--space-3);
  }

  .nav-item.has-submenu {
    display: block;
  }

  .nav-item.has-submenu > .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .nav-item.has-submenu > .nav-link::after {
    content: "";
    width: 8px;
    height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    opacity: 0.65;
    transition: transform 0.25s var(--ease-out), opacity 0.25s;
  }

  .nav-item.has-submenu:hover > .nav-link::after,
  .nav-item.has-submenu:focus-within > .nav-link::after {
    transform: rotate(225deg) translateY(0);
    opacity: 1;
  }

  .submenu-toggle {
    display: none;
  }

  .submenu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    flex-basis: auto;
    min-width: 168px;
    max-height: none;
    overflow: visible;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: var(--space-2);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out),
      visibility 0.25s;
  }

  /* 下拉框与一级导航之间的透明桥接区域，避免鼠标移动时菜单关闭 */
  .submenu::before {
    content: "";
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    height: 10px;
  }

  .nav-item.has-submenu:hover > .submenu,
  .nav-item.has-submenu:focus-within > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }

  .submenu-link {
    padding: var(--space-2) var(--space-5);
    border-radius: var(--radius-sm);
    white-space: nowrap;
  }

  /* 桌面端：语言项独立于导航，右对齐并预留间距 */
  .lang-item {
    display: block;
    margin-left: var(--space-8);
  }

  .lang-option {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    white-space: nowrap;
  }

  .hero-content {
    padding: calc(var(--header-height) + var(--space-10)) var(--space-8) var(--space-16);
  }

  .about-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }

  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }

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

  .news-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }

  .news-item {
    grid-template-columns: 140px 1fr;
    padding: var(--space-6);
  }

  .footer-nav {
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-6);
  }

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

/* ---- 响应式：桌面 ---- */
@media (min-width: 1024px) {
  .scroll-indicator {
    display: flex;
  }

  .section {
    padding: calc(var(--header-height) + var(--space-8)) var(--space-12) var(--space-20);
  }

  /* 底部栏：与首页桌面端一致，保持自身上下间距，横向对齐 .section */
  .section.section-footer {
    padding: var(--footer-space-top) var(--space-12) var(--footer-space-bottom);
  }

  .header-container {
    padding: 0 var(--space-12);
  }

  .nav-link {
    padding: var(--space-2) var(--space-4);
    font-size: 1rem;
  }

  .advantages-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .bases-layout {
    grid-template-columns: 340px 1fr;
    gap: var(--space-8);
  }

  .base-tab {
    padding: var(--space-4) var(--space-5);
  }

  .footer-nav {
    gap: var(--space-6);
  }
}

/* ---- 响应式：大屏 ---- */
@media (min-width: 1280px) {
  .section-content {
    max-width: 1360px;
  }

  .about-content {
    gap: var(--space-20);
  }

  .bases-layout {
    grid-template-columns: 380px 1fr;
  }
}

/* ---- 减少动画偏好 ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .scroll-container {
    scroll-snap-type: none !important;
  }

  .video-background video {
    display: none;
  }
}

/* ---- 子页面通用 ---- */
.subpage {
  min-height: 100vh;
  padding-top: calc(var(--header-height) + var(--space-16));
  padding-bottom: var(--space-16);
  background:
    radial-gradient(circle at 15% 18%, rgba(226, 33, 28, 0.16), transparent 45%),
    radial-gradient(circle at 85% 82%, rgba(181, 27, 22, 0.18), transparent 50%),
    var(--bg);
}

.subpage-hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.subpage-eyebrow {
  color: var(--brand);
  letter-spacing: 0.25em;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.subpage-title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  color: var(--ink);
  margin-bottom: var(--space-6);
}

.subpage-desc {
  max-width: 720px;
  margin: 0 auto var(--space-8);
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.9;
}

.subpage-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- 打印 ---- */
@media print {
  .site-header,
  .video-background video,
  .scroll-hint,
  .hero-cta {
    display: none !important;
  }

  .section {
    min-height: auto;
    page-break-inside: avoid;
  }
}