/* =========================================
   青智护飞宣传网站样式
   自然蒸馏风格：暖调米白、墨绿、橄榄绿、品牌绿点缀
   响应式设计，兼顾 PC 与移动端
   ========================================= */

/* ----- 设计令牌 ----- */
:root {
  /* 品牌色：保留但节制使用 */
  --color-primary: #2D8C4A;
  --color-primary-dark: #1F6B36;
  --color-primary-light: #4CA06A;

  /* 高级自然色调 */
  --color-forest: #1C2924;
  --color-forest-soft: #2F3F37;
  --color-sage: #5F7A6A;
  --color-sage-light: #8FA396;
  --color-gold: #C9A86C;
  --color-gold-light: #D9BC8E;

  /* 背景与表面 */
  --color-bg: #F7F5F0;
  --color-bg-warm: #F0EBE3;
  --color-surface: #FFFFFF;
  --color-surface-raised: #FAF8F3;

  /* 文字 */
  --color-text: #1C2924;
  --color-text-secondary: #4A5E54;
  --color-text-muted: #7D8E84;

  /* 边框 */
  --color-border: #E5E0D8;
  --color-border-strong: #D4CFC6;

  /* 字体 */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", "Songti SC", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(28, 41, 36, 0.04);
  --shadow-md: 0 8px 30px rgba(28, 41, 36, 0.08);
  --shadow-lg: 0 20px 50px rgba(28, 41, 36, 0.12);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  --container-max: 1200px;
  --navbar-height: 76px;
}

/* ----- 重置 ----- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, p, ul, figure {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ----- 通用容器 ----- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 32px;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 48px;
  }
}

/* ----- 按钮 ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
  cursor: pointer;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(45, 140, 74, 0.28);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  box-shadow: 0 6px 20px rgba(45, 140, 74, 0.38);
}

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

.btn-outline:hover {
  background-color: var(--color-forest);
  color: #fff;
  border-color: var(--color-forest);
}

/* Hero 区域按钮 */
.hero .btn-outline {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}

.hero .btn-outline:hover {
  background-color: #fff;
  color: var(--color-forest);
  border-color: #fff;
}

/* ----- 导航栏 ----- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  transition: background-color var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base), transform var(--transition-base);
}

/* 下滑隐藏导航栏：整体上移出视口（由 JS 控制 hidden 类） */
.navbar.hidden {
  transform: translateY(-100%);
}

.navbar.scrolled {
  background-color: rgba(247, 245, 240, 0.94);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

/* 移动端菜单展开时禁用毛玻璃：backdrop-filter 会使内部 fixed 定位的
   全屏菜单以导航栏为包含块（而非视口），导致背景只盖住导航栏区域且点击穿透。
   transform 同样会创建包含块，故菜单展开时强制归位（transform: none），
   使“下滑隐藏”与全屏菜单互斥。同时关闭过渡：否则 backdrop-filter 需
   250ms 渐变到 none，期间菜单一直被约束在导航栏条带内，直到过渡结束才弹到
   全屏（表现为底色卡一下） */
.navbar.menu-open {
  backdrop-filter: none;
  transform: none;
  transition: none;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  color: #fff;
  transition: color var(--transition-base);
}

.navbar.scrolled .logo {
  color: var(--color-forest);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.18);
  color: #fff;
  transition: background-color var(--transition-base), color var(--transition-base);
}

.navbar.scrolled .logo-icon {
  background-color: rgba(45, 140, 74, 0.1);
  color: var(--color-primary);
}

.nav-menu {
  display: none;
  align-items: center;
  gap: 6px;
}

.nav-link {
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-full);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.navbar.scrolled .nav-link {
  color: var(--color-text-secondary);
}

.nav-link:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.12);
}

.navbar.scrolled .nav-link:hover {
  color: var(--color-forest);
  background-color: rgba(28, 41, 36, 0.06);
}

.nav-cta {
  margin-left: 8px;
  background-color: #fff;
  color: var(--color-forest) !important;
  font-weight: 600;
}

.navbar.scrolled .nav-cta {
  background-color: var(--color-primary);
  color: #fff !important;
}

.nav-cta:hover {
  background-color: var(--color-bg) !important;
  color: var(--color-forest) !important;
}

.navbar.scrolled .nav-cta:hover {
  background-color: var(--color-primary-dark) !important;
  color: #fff !important;
}

/* 汉堡菜单按钮 */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  z-index: 1001;
}

.menu-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #fff;
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

.navbar.scrolled .menu-bar {
  background-color: var(--color-forest);
}

/* 必须置于 .navbar.scrolled .menu-bar 之后：菜单展开时强制三条杠为白色，
   避免滚动状态下深绿叉号与深绿菜单背景融为一体不可见 */
.navbar.menu-open .menu-bar {
  background-color: #fff;
}

.menu-toggle.active .menu-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active .menu-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active .menu-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
}

/* 移动端菜单 */
.nav-menu.mobile-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0;
  background: var(--color-forest);
  padding: 100px 32px 40px;
  gap: 16px;
  z-index: 999;
}

.nav-menu.mobile-open .nav-link {
  font-size: 22px;
  color: #fff;
  padding: 14px 0;
  border-radius: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-menu.mobile-open .nav-link:hover {
  background-color: transparent;
  color: rgba(255, 255, 255, 0.75);
}

.nav-menu.mobile-open .nav-cta {
  margin-left: 0;
  margin-top: 16px;
  background-color: #fff;
  color: var(--color-forest) !important;
  border: none;
  border-radius: var(--radius-full);
  text-align: center;
  padding: 16px;
}

/* ----- Hero 区域 ----- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--navbar-height);
  padding-bottom: 80px;
  color: #fff;
  overflow: hidden;
  background-color: var(--color-forest);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(18, 28, 24, 0.82) 0%, rgba(18, 28, 24, 0.55) 50%, rgba(18, 28, 24, 0.35) 100%);
  z-index: 1;
}

.hero-inner {
  position: relative;
  display: grid;
  gap: 48px;
  align-items: center;
  z-index: 2;
}

.hero-content {
  max-width: 620px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold-light);
  margin-bottom: 20px;
}

.hero-eyebrow::before {
  content: "";
  display: block;
  width: 32px;
  height: 1px;
  background-color: var(--color-gold);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(44px, 8vw, 76px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0.02em;
  margin-bottom: 18px;
}

.hero-subtitle {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 20px;
  line-height: 1.5;
}

.hero-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.72);
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.8;
}

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

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

.qr-card {
  max-width: 420px;
  width: 100%;
}

.qr-image {
  width: 100%;
  border-radius: var(--radius-md);
  cursor: zoom-in;
}

.qr-image-large {
  width: 100%;
  max-width: 420px;
  cursor: zoom-in;
  transition: transform var(--transition-base);
  border-radius: var(--radius-md);
}

.qr-image-large:hover {
  transform: scale(1.02);
}

.hero-scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0.7;
  z-index: 2;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, #fff, transparent);
  animation: scrollPulse 2s infinite ease-in-out;
}

@keyframes scrollPulse {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(8px); opacity: 1; }
}

@media (min-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
  }
  .hero-media {
    justify-content: flex-end;
  }
}

/* ----- 通用 Section ----- */
.section {
  padding: 80px 0;
}

.section-light {
  background-color: var(--color-surface);
}

.section-warm {
  background-color: var(--color-bg-warm);
}

.section-dark {
  background-color: var(--color-forest);
  color: #fff;
}

.section-header {
  max-width: 720px;
  margin: 0 0 56px;
  text-align: left;
}

.section-tag {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(52px, 9vw, 104px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--color-forest);
  padding: 0;
  margin-bottom: 24px;
  -webkit-mask-image: linear-gradient(to bottom, #000 25%, rgba(0, 0, 0, 0.22));
  mask-image: linear-gradient(to bottom, #000 25%, rgba(0, 0, 0, 0.22));
}

.section-tag::before {
  display: none;
}

.section-tag-light {
  color: #fff;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 18px;
  color: var(--color-text);
}

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

.section-lead {
  font-size: 17px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.section-lead-light {
  color: rgba(255, 255, 255, 0.78);
}

@media (min-width: 768px) {
  .section {
    padding: 110px 0;
  }
  .section-header {
    margin-bottom: 72px;
  }
}

/* ----- 项目背景卡片 ----- */
.about-grid {
  display: grid;
  gap: 24px;
}

.about-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(95, 122, 106, 0.25);
}

.about-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg-warm);
  color: var(--color-sage);
  margin-bottom: 22px;
  border: 1px solid var(--color-border);
}

.about-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.about-text {
  color: var(--color-text-secondary);
  line-height: 1.75;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ----- 解决方案功能卡片 ----- */
.feature-grid {
  display: grid;
  gap: 24px;
}

.feature-card {
  background-color: var(--color-surface-raised);
  border-radius: var(--radius-lg);
  padding: 34px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--color-bg-warm);
  color: var(--color-sage);
  margin-bottom: 24px;
  border: 1px solid var(--color-border);
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text);
}

.feature-text {
  color: var(--color-text-secondary);
  line-height: 1.75;
}

@media (min-width: 768px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ----- 数据成效 ----- */
.stats-grid {
  display: grid;
  gap: 20px;
  text-align: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 20px;
  border-radius: var(--radius-lg);
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: background-color var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}

.stat-item:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: rgba(201, 168, 108, 0.25);
  transform: translateY(-4px);
}

.stat-number {
  font-family: var(--font-serif);
  font-size: clamp(40px, 6vw, 56px);
  font-weight: 600;
  line-height: 1;
  color: #fff;
}

.stat-unit {
  font-size: 17px;
  font-weight: 500;
  color: var(--color-gold-light);
  margin-top: 6px;
}

.stat-label {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 10px;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

/* ----- 照片故事 ----- */
.photo-story {
  background-color: var(--color-surface);
}

.photo-story-header {
  text-align: left;
  max-width: 720px;
  margin: 0 0 56px;
}

.photo-story-layout {
  display: grid;
  gap: 40px;
  align-items: center;
}

.photo-story-media {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.photo-story-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.photo-story-caption {
  position: absolute;
  left: 24px;
  bottom: 24px;
  right: 24px;
  padding: 14px 18px;
  background-color: rgba(28, 41, 36, 0.7);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 14px;
  line-height: 1.6;
}

.photo-story-text {
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin-bottom: 28px;
}

.photo-story-list {
  display: grid;
  gap: 16px;
}

.photo-story-list li {
  position: relative;
  padding-left: 28px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.photo-story-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-gold);
}

@media (min-width: 1024px) {
  .photo-story-layout {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 64px;
  }
}

/* ----- 团队与实践 ----- */
.team-section {
  padding-bottom: 100px;
}

.team-header {
  text-align: left;
  max-width: 720px;
  margin: 0 0 56px;
}

.team-showcase {
  display: grid;
  gap: 40px;
  align-items: center;
}

/* 轮播图占据主要位置 */
.team-carousel {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background-color: var(--color-forest);
}

.carousel-viewport {
  overflow: hidden;
  width: 100%;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  width: 100%;
}

.carousel-slide {
  flex: 0 0 100%;
  width: 100%;
  position: relative;
}

.carousel-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center 35%;
  display: block;
  cursor: zoom-in;
}

.carousel-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 18px 24px 28px;
  margin: 0;
  font-size: 14px;
  color: #fff;
  background: linear-gradient(to top, rgba(18, 28, 24, 0.75), transparent);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(4px);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.carousel-btn:hover {
  background-color: rgba(255, 255, 255, 0.24);
}

.carousel-btn:active {
  transform: translateY(-50%) scale(0.95);
}

.carousel-prev {
  left: 16px;
}

.carousel-next {
  right: 16px;
}

/* 图片翻页指示：视频进度条样式，贴图片底部横向分布 */
.carousel-dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12px;
  z-index: 2;
  display: flex;
  gap: 5px;
  padding: 0 20px;
}

/* 按钮本身作为点击热区，视觉横条由伪元素绘制 */
.carousel-dot {
  flex: 1;
  height: 20px;
  background: none;
  border: none;
  position: relative;
  transition: none;
  cursor: pointer;
}

.carousel-dot::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 4px;
  transform: translateY(-50%);
  border-radius: 2px;
  background-color: rgba(255, 255, 255, 0.35);
  transition: background-color var(--transition-fast);
}

.carousel-dot:hover::after {
  background-color: rgba(255, 255, 255, 0.6);
}

.carousel-dot.active::after {
  background-color: #fff;
}

.team-content .section-tag {
  margin-bottom: 16px;
}

.team-content .section-title {
  margin-bottom: 20px;
}

.team-text {
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin-bottom: 24px;
}

.team-list {
  margin-bottom: 32px;
}

.team-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.team-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-gold);
}

@media (min-width: 1024px) {
  .team-showcase {
    grid-template-columns: 1.5fr 0.5fr;
    gap: 56px;
  }

  .team-carousel {
    border-radius: var(--radius-xl);
  }

  .carousel-image {
    aspect-ratio: 16 / 8;
  }
}

/* ----- CTA 区域 ----- */
.cta-section {
  background-color: var(--color-bg);
  /* padding-top 需大于导航栏高度(76px)，避免锚点跳转后被固定导航栏遮挡 */
  padding: 80px 0 100px;
}

.cta-card {
  position: relative;
  display: grid;
  gap: 40px;
  align-items: center;
  background-color: var(--color-forest);
  color: #fff;
  border-radius: var(--radius-xl);
  padding: 44px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("../images/field-survey-close.jpg");
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  z-index: 0;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 600;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 520px;
}

.cta-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.cta-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background-color: rgba(201, 168, 108, 0.18);
  color: var(--color-gold-light);
  border: 1px solid rgba(201, 168, 108, 0.25);
}

.cta-qr {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 56px;
  z-index: 1;
}

@media (min-width: 768px) {
  .cta-card {
    grid-template-columns: 1.5fr 1fr;
    padding: 60px;
  }
}

/* ----- 页脚 ----- */
.footer {
  background-color: var(--color-forest);
  color: rgba(255, 255, 255, 0.7);
  padding: 72px 0 28px;
}

.footer-grid {
  display: grid;
  /* 移动端左列（快速链接）字少、右列（关于我们）字多，非均分 */
  grid-template-columns: minmax(0, 1fr) minmax(0, 3fr);
  gap: 40px 48px;
  margin-bottom: 56px;
}

/* 品牌区占满整行，让“快速链接”与“关于我们”在移动端并排 */
.footer-brand {
  grid-column: 1 / -1;
}

.footer-logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-logo .logo-icon {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-gold);
}

.footer-desc {
  font-size: 15px;
  line-height: 1.7;
  max-width: 280px;
}

.footer-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}

.footer-links a,
.footer-contact p {
  display: block;
  font-size: 15px;
  margin-bottom: 12px;
  transition: color var(--transition-fast);
}

.footer-links a,
.footer-contact a {
  display: block;
}

.footer-links a:hover,
.footer-contact a:hover {
  color: var(--color-gold-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.45);
}

/* 备案信息 */
.beian-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 24px;
  margin-top: 12px;
}

.beian-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.45);
  transition: color var(--transition-fast);
}

.beian-links a:hover {
  color: var(--color-gold-light);
}

.beian-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 2fr;
    gap: 48px;
  }
  .footer-brand {
    grid-column: auto;
  }
}

/* ----- 二维码模态层 ----- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(18, 28, 24, 0.65);
  backdrop-filter: blur(6px);
}

.modal-content {
  position: relative;
  max-width: 92vw;
  max-height: 92vh;
  width: auto;
  text-align: center;
  animation: modalIn 0.3s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 1;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.12);
  color: #fff;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
  background-color: rgba(255, 255, 255, 0.22);
  color: #fff;
}

.modal-image {
  display: block;
  width: auto;
  height: auto;
  max-width: 92vw;
  max-height: 92vh;
  margin: 0 auto;
  border-radius: var(--radius-lg);
}

/* ----- 滚动动画 ----- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .scroll-line,
  .team-image,
  .hero-scroll {
    animation: none;
  }
  .navbar {
    transition: none;
  }
}

/* ----- 无障碍焦点 ----- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.navbar.scrolled a:focus-visible,
.navbar.scrolled button:focus-visible {
  outline-color: var(--color-primary-dark);
}