/* 飞尔戈床垫 FEIERGE MATTRESS - 最终完整版样式
   根字体默认100%，1rem=16px，全局统一缩放可控
   命名规范：工具类+组件类+区块装饰分离
*/
:root {
  --amber-50: #fffbeb;
  --amber-100: #fef3c7;
  --amber-200: #fde68a;
  --amber-300: #fcd34d;
  --amber-400: #fbbf24;
  --amber-500: #f59e0b;
  --amber-600: #d97706;
  --amber-700: #b45309;
  --amber-800: #92400e;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --gray-950: #030712;
  --white: #ffffff;
  --black: #000000;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* 根字体恢复默认100% 1rem=16px */
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  height: 100%;
  font-size: 100%;
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-gutter: stable;
}

/* 全局重置 */
*,
::before,
::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
ul,
ol {
  list-style: none;
}
button {
  cursor: pointer;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  padding: 0;
  -webkit-appearance: button;
}
input,
textarea,
select {
  font: inherit;
  color: inherit;
  outline: none;
}
svg {
  overflow: hidden;
  vertical-align: middle;
}

/* 跳转到主内容（skip-link）：默认移出视口，键盘聚焦时滑入可见 */
.skip-to-content {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--amber-500);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-to-content:focus {
  top: 1rem;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* 全局过渡工具类 */
.trans-all {
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.trans-colors {
  transition: color 0.3s, background-color 0.3s, border-color 0.3s;
}
.trans-transform {
  transition-property: transform;
}
.min-h-fullscreen {
  min-height: 100vh;
  min-height: 100dvh;
}

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
  background: var(--white);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main {
  flex: 1;
  width: 100%;
  min-height: 0;
}

/* 滚动条美化 */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--gray-300) transparent;
}
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--gray-400);
}

/* 选中文本 */
::selection {
  background: var(--amber-100);
  color: var(--amber-800);
}
::-moz-selection {
  background: var(--amber-100);
  color: var(--amber-800);
}

/* 文字截断 */
.line-clamp-1 {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1;
  overflow: hidden;
  max-height: 1.6em;
}
.line-clamp-2 {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  max-height: 3.2em;
}

/* 焦点样式 */
:focus-visible {
  outline: 2px solid var(--amber-600);
  outline-offset: 2px;
  border-radius: 2px;
}
a:focus-visible,
button:focus-visible {
  border-radius: 4px;
}

/* 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;
  }
}

/* 通用工具类 */
.no-underline {
  text-decoration: none;
}
.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}
.hover-scale:hover {
  transform: scale(1.02);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* 宽度、最大宽度 */
.max-w-1900px {
  max-width: 1900px;
  margin-left: auto;
  margin-right: auto;
}
.max-w-5xl {
  max-width: 1024px;
  margin-left: auto;
  margin-right: auto;
}
.max-w-4xl {
  max-width: 896px;
  margin-left: auto;
  margin-right: auto;
}
.max-w-3xl {
  max-width: 768px;
  margin-left: auto;
  margin-right: auto;
}
.max-w-2xl {
  max-width: 672px;
  margin-left: auto;
  margin-right: auto;
}
.w-full {
  width: 100%;
}
.w-\[220px\] {
  width: 220px;
}
.h-\[40px\] {
  height: 40px;
}
.h-\[120px\] {
  height: 120px;
}
.h-\[500px\] {
  min-height: 500px;
}
.h-\[380px\] {
  height: 380px;
}
.h-\[480px\] {
  height: 480px;
}
.h-\[620px\] {
  height: 620px;
}
.h-\[700px\] {
  height: 700px;
}
.h-\[2px\] {
  height: 2px;
}
.h-\[1px\] {
  height: 1px;
}

/* 响应式高度 */
@media (min-width: 640px) {
  .sm\:h-\[480px\] {
    height: 480px;
  }
  .sm\:h-\[600px\] {
    height: 600px;
  }
}
@media (min-width: 1024px) {
  .lg\:h-\[620px\] {
    height: 620px;
  }
  .lg\:h-\[700px\] {
    height: 700px;
  }
}

/* 文字颜色、对齐 */
.text-center {
  text-align: center;
}
.text-white {
  color: var(--white);
}
.text-gray-900 {
  color: var(--gray-900);
}
.text-gray-700 {
  color: var(--gray-700);
}
.text-gray-600 {
  color: var(--gray-600);
}
.text-gray-500 {
  color: var(--gray-500);
}
.text-gray-400 {
  color: var(--gray-400);
}
.text-amber-600 {
  color: var(--amber-600);
}
.text-amber-700 {
  color: var(--amber-700);
}
.text-amber-400 {
  color: var(--amber-400);
}

/* 字体粗细、字号 */
.font-bold {
  font-weight: 700;
}
.font-semibold {
  font-weight: 600;
}
.font-medium {
  font-weight: 500;
}
.text-xs {
  font-size: 0.8125rem;
}
.text-sm {
  font-size: 0.9375rem;
}
.text-base {
  font-size: 1rem;
}
.text-lg {
  font-size: 1.125rem;
}
.text-xl {
  font-size: 1.25rem;
}
.text-2xl {
  font-size: 1.5rem;
}
.text-3xl {
  font-size: 1.875rem;
}
.text-4xl {
  font-size: 2.25rem;
}
.text-5xl {
  font-size: 3rem;
}
.text-7xl {
  font-size: 4.5rem;
}
/* 大号自定义 2.4rem = 38.4px */
.text-large-custom {
  font-size: 2.4rem;
}
@media (min-width: 640px) {
  .sm\:text-3xl {
    font-size: 1.875rem;
  }
  .sm\:text-4xl {
    font-size: 2.25rem;
  }
  .sm\:text-5xl {
    font-size: 3rem;
  }
}
@media (min-width: 1024px) {
  .lg\:text-4xl {
    font-size: 2.25rem;
  }
  .lg\:text-5xl {
    font-size: 3rem;
  }
  .lg\:text-7xl {
    font-size: 4.5rem;
  }
}

/* 字间距、行高 */
.tracking-tight {
  letter-spacing: -0.025em;
}
.tracking-wider {
  letter-spacing: 0.05em;
}
.tracking-\[0\.2em\] {
  letter-spacing: 0.2em;
}
.leading-tight {
  line-height: 1.25;
}
.leading-relaxed {
  line-height: 1.625;
}
.leading-108 {
  line-height: 1.08;
}
.uppercase {
  text-transform: uppercase;
}
.whitespace-nowrap {
  white-space: nowrap;
}

/* 定位、层级 */
.relative {
  position: relative;
}
.absolute {
  position: absolute;
}
.fixed {
  position: fixed;
}
.inset-0 {
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}
.z-50 {
  z-index: 50;
}
.z-40 {
  z-index: 40;
}
.pointer-events-none {
  pointer-events: none;
}
.overflow-hidden {
  overflow: hidden;
}

/* Flex布局 */
.flex {
  display: flex;
}
.inline-flex {
  display: inline-flex;
}
.hidden {
  display: none;
}
.block {
  display: block;
}
.flex-col {
  flex-direction: column;
}
.flex-wrap {
  flex-wrap: wrap;
}
.items-start {
  align-items: flex-start;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.flex-1 {
  flex: 1 1 0%;
}
.flex-shrink-0 {
  flex-shrink: 0;
}

/* 图片、圆角、阴影 */
.object-cover {
  object-fit: cover;
}
.object-center {
  object-position: center;
}
.rounded-full {
  border-radius: 9999px;
}
.rounded-lg {
  border-radius: 0.5rem;
}
.rounded-xl {
  border-radius: 0.75rem;
}
.rounded-2xl {
  border-radius: 1.5rem;
}
.shadow-sm {
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}
.shadow-lg {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}
.shadow-xl {
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* 间距 */
.gap-3 {
  gap: 0.75rem;
}
.gap-4 {
  gap: 1rem;
}
.gap-6 {
  gap: 1.5rem;
}
.gap-12 {
  gap: 3rem;
}
.space-y-3 > * + * {
  margin-top: 0.75rem;
}
.space-y-4 > * + * {
  margin-top: 1rem;
}
.space-y-6 > * + * {
  margin-top: 1.5rem;
}
.py-2 {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}
.py-2\.5 {
  padding-top: 0.625rem;
  padding-bottom: 0.625rem;
}
.py-4 {
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.py-8 {
  padding-top: 2rem;
  padding-bottom: 2rem;
}
.py-16 {
  padding-top: 4rem;
  padding-bottom: 4rem;
}
.py-20 {
  padding-top: 5rem;
  padding-bottom: 5rem;
}
.py-24 {
  padding-top: 6rem;
  padding-bottom: 6rem;
}
.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}
.px-5 {
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}
.px-8 {
  padding-left: 2rem;
  padding-right: 2rem;
}
.pt-32 {
  padding-top: 8rem;
}
.pb-24 {
  padding-bottom: 6rem;
}
.pl-8 {
  padding-left: 2rem;
}
.pl-16 {
  padding-left: 4rem;
}
@media (min-width: 640px) {
  .sm\:px-6 {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}
@media (min-width: 1024px) {
  .lg\:px-8 {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}
.mb-3 {
  margin-bottom: 0.75rem;
}
.mb-4 {
  margin-bottom: 1rem;
}
.mb-6 {
  margin-bottom: 1.5rem;
}
.mb-8 {
  margin-bottom: 2rem;
}
.mt-0\.5 {
  margin-top: 0.125rem;
}
.mt-1 {
  margin-top: 0.25rem;
}
.mt-2 {
  margin-top: 0.5rem;
}
.mt-4 {
  margin-top: 1rem;
}
.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* 背景 */
.bg-white {
  background: var(--white);
}
.bg-gray-50 {
  background: var(--gray-50);
}
.bg-gray-900 {
  background: var(--gray-900);
}
.bg-gray-950 {
  background: var(--gray-950);
}
.bg-amber-50 {
  background: var(--amber-50);
}
.bg-amber-500 {
  background: var(--amber-500);
}
.bg-gradient-to-br {
  background-image: linear-gradient(to bottom right, var(--tw-gradient-stops));
}
.bg-gradient-to-r {
  background-image: linear-gradient(to right, var(--tw-gradient-stops));
}

/* 边框 */
.border {
  border: 1px solid;
}
.border-t {
  border-top: 1px solid;
}
.border-gray-100 {
  border-color: var(--gray-100);
}
.border-gray-800 {
  border-color: var(--gray-800);
}
.border-amber-200\/50 {
  border-color: rgba(253, 230, 138, 0.5);
}

/* 毛玻璃 */
.backdrop-blur-sm {
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.backdrop-blur-xl {
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}
@media (max-width: 768px) {
  .backdrop-blur-sm,
  .backdrop-blur-xl {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

/* 文字渐变 */
.bg-clip-text {
  -webkit-background-clip: text;
  background-clip: text;
}
.text-transparent {
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* 导航栏 */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: 120px;
  width: 100%;
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  border-bottom: 1px solid transparent;
}
#navbar.nav-transparent:not(.nav-scrolled) {
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.25), transparent);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
#navbar.nav-transparent .nav-link {
  color: rgba(255, 255, 255, 0.85);
}
#navbar.nav-transparent .nav-link:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}
#navbar.nav-transparent .nav-link.active {
  color: var(--amber-300);
  font-weight: 600;
}
#navbar.nav-transparent .nav-phone {
  color: var(--amber-300);
}
#navbar.nav-transparent .nav-cta {
  background: var(--amber-600);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.25);
}
#navbar.nav-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-blur-xl;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}
#navbar.nav-scrolled .nav-link {
  color: var(--amber-800);
}
#navbar.nav-scrolled .nav-link:hover {
  color: var(--amber-700);
  background: rgba(251, 191, 36, 0.05);
}
#navbar.nav-scrolled .nav-link.active {
  color: var(--amber-700);
  font-weight: 600;
}
#navbar.nav-scrolled .nav-phone {
  color: var(--amber-600);
}
#navbar.nav-scrolled .nav-cta {
  background: linear-gradient(135deg, var(--amber-500), var(--amber-600));
  color: var(--white);
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
}
.nav-link {
  position: relative;
  transition: color 0.3s ease;
  padding: 0.5rem 0.875rem;
  border-radius: 6px;
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--amber-500), var(--amber-600), var(--amber-500), transparent);
  border-radius: 2px;
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  transform: translateX(-50%);
  opacity: 0;
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 48px;
  opacity: 1;
}

/* 移动端菜单按钮（汉堡图标 stroke=currentColor）→ 品牌琥珀色 */
.nav-toggle {
  color: var(--amber-600);
  transition: color 0.3s ease;
}
.nav-toggle:hover {
  color: var(--amber-700);
}

/* 品牌 CTA 按钮（防御性：即使 Tailwind 失效也保持琥珀色）
   保留 HTML 中原有 Tailwind 类，本类仅做兜底，取值一致不冲突 */
.btn-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  color: #fff;
  background-image: linear-gradient(to right, var(--amber-600), var(--amber-700));
  border: none;
  border-radius: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 10px 15px -3px rgba(253, 230, 138, 0.3);
  transition: background-image 0.3s ease, transform 0.15s ease;
}
.btn-brand:hover {
  background-image: linear-gradient(to right, var(--amber-700), var(--amber-800));
}
.btn-brand:active {
  transform: scale(0.99);
}

/* 新闻分类筛选标签 -> 品牌色（纯自定义，不依赖 Tailwind，天然健壮） */
.news-filter-btn {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--amber-700);
  background: #fff;
  border: 1px solid var(--amber-200);
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.25s ease;
}
.news-filter-btn:hover {
  background: var(--amber-50);
  border-color: var(--amber-300);
}
.news-filter-btn.active {
  color: #fff;
  background: linear-gradient(to right, var(--amber-600), var(--amber-700));
  border-color: transparent;
  box-shadow: 0 6px 14px -4px rgba(217, 119, 6, 0.35);
}
.logo-wrap .logo-white,
.logo-wrap .logo-dark {
  position: absolute;
  inset: 0;
  height: 100%;
  width: auto;
  object-contain;
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.logo-wrap .logo-dark {
  opacity: 0;
  pointer-events: none;
}
.logo-wrap .logo-white {
  opacity: 1;
}
#navbar.nav-scrolled .logo-wrap .logo-white {
  opacity: 0;
}
#navbar.nav-scrolled .logo-wrap .logo-dark {
  opacity: 1;
}
.nav-cta {
  position: relative;
  overflow: hidden;
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  padding: 0.6rem 1.4rem;
  border-radius: 8px;
  border: none;
}
#mobile-menu {
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  position: absolute;
  top: 120px;
  left: 0;
  right: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.96);
}
#mobile-menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* 动画 */
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
}
.pulse-dot {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}
@keyframes kenBurns {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.1);
  }
}
@keyframes glow-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(1.05);
  }
}
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.reveal-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-up.delay-1 {
  transition-delay: 0.1s;
}
.reveal-up.delay-2 {
  transition-delay: 0.2s;
}
.reveal-up.delay-3 {
  transition-delay: 0.3s;
}
.reveal-up.delay-4 {
  transition-delay: 0.4s;
}
.reveal-up.delay-5 {
  transition-delay: 0.5s;
}
.reveal-up.delay-6 {
  transition-delay: 0.6s;
}

/* Hero 入场动画：HTML 中使用了 slide-up / slide-up-N / fade-in-N，
   此前在 CSS 中从未定义（与第四轮 .hero-bg 同源：HTML 引用了 class，CSS 漏定义），
   导致首屏标题/副文案/CTA/数据 的入场动画缺失。此处补齐。*/
@keyframes heroSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes heroFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.slide-up {
  opacity: 0;
  animation: heroSlideUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.slide-up-300 { animation-delay: 0.3s; }
.slide-up-500 { animation-delay: 0.5s; }
.slide-up-700 { animation-delay: 0.7s; }
.fade-in-900  { opacity: 0; animation: heroFadeIn 0.9s ease forwards; }
.fade-in-1100 { opacity: 0; animation: heroFadeIn 1.1s ease forwards; }

/* 区块装饰层 */
.dec-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  animation: kenBurns 8s ease-out forwards;
  pointer-events: none;
}
/* Hero 背景图：HTML 中 div 使用 class="dec-hero-bg hero-bg"，
   此前 .hero-bg 未定义导致首屏背景图缺失（白字叠加浅底不可见） */
.hero-bg {
  background-image: url(../images/feierge-mattress-hero-main.webp);
}
.dec-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.3) 50%, rgba(0, 0, 0, 0.1));
  z-index: 1;
  pointer-events: none;
}
.dec-hero-glow-1 {
  position: absolute;
  top: 25%;
  right: 25%;
  width: 500px;
  height: 500px;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  animation: glow-pulse 4s infinite;
}
.dec-hero-glow-2 {
  position: absolute;
  bottom: 25%;
  left: 25%;
  width: 300px;
  height: 300px;
  background: rgba(251, 191, 36, 0.05);
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  animation: glow-pulse 4s infinite 2s;
}
.dec-products-line-t,
.dec-products-line-b {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  pointer-events: none;
  z-index: 2;
}
.dec-products-line-t {
  top: 0;
  background: linear-gradient(to right, transparent, rgba(217, 119, 6, 0.3), transparent);
}
.dec-products-line-b {
  bottom: 0;
  background: linear-gradient(to right, transparent, rgba(217, 119, 6, 0.2), transparent);
}
.section-parallax {
  position: relative;
  overflow: hidden;
}
.parallax-bg-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
  pointer-events: none;
}
.parallax-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
/* ============================================================
   防御性兜底 (关联 TODO-06)
   线上 js/tailwind.min.js 若为空/加载失败，以下规则保证关键结构
   区域不塌陷。原理：Tailwind 的类名写在 HTML 里，与脚本是否成功
   编译无关，所以直接用同名类做选择器即可命中兜底样式；取值与本该
   由 Tailwind 生成的一致，Tailwind 正常时不冲突、不重复。
   ============================================================ */
/* 整页骨架：至少一屏高 + footer 贴底 */
body.min-h-screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
/* 大 hero：min-h-screen 兜底（首页 / 关于 / 服务 / 产品等） */
.min-h-screen {
  min-height: 100vh;
}
/* 子页 hero：min-h-[500px] 兜底（与 Tailwind 同值，不冲突） */
.min-h-\[500px\] {
  min-height: 500px;
}

/* 子页暗色 hero 渐变 + 居中兜底（命中 bg-gradient-to-br from-gray-900 to-gray-800） */
.bg-gradient-to-br.from-gray-900.to-gray-800 {
  background-image: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
  display: flex;
  align-items: center;
}
/* 首页 CTA：补 py-24 (6rem)。渐变已由 .dec-cta-bg 自定义层提供，无需重复 */
.section-cta {
  position: relative;
  overflow: hidden;
  padding: 6rem 0;
}
/* 子页 CTA 兜底：补 py-20 (5rem) + 琥珀横向渐变 */
.cta-band {
  padding: 5rem 0;
  background-image: linear-gradient(to right, var(--amber-700) 0%, var(--amber-600) 50%, var(--amber-700) 100%);
}
.dec-cta-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, var(--amber-800), var(--amber-700), var(--amber-800));
  pointer-events: none;
}
.dec-cta-noise {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  pointer-events: none;
}
.dec-cta-beam {
  position: absolute;
  top: 0;
  left: 33.333%;
  width: 400px;
  height: 100%;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.04), transparent);
  transform: skewX(-12deg);
  pointer-events: none;
}

/* 页脚 */
footer {
  line-height: 1.5;
  flex-shrink: 0;
}
footer a:hover {
  color: var(--amber-400);
}
.footer-logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

/* 表单通用 */
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-200);
  border-radius: 0.5rem;
  font-size: 0.875rem;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--amber-500);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.12);
}