/* ==========================================================================
   云梯 (Yunti.lol) - 天际蓝图 Skyline 核心视觉与响应式样式体系
   Framework: Skyline Blueprint
   ========================================================================== */

:root {
  /* 天际调色板 (Skyline Palette) */
  --sky-space: #050d1a;
  --sky-deep: #0a1e38;
  --sky-night: #0e2b52;
  --sky-azure: #0369a1;
  --sky-blue: #0284c7;
  --sky-cyan: #38bdf8;
  --sky-soft: #bae6fd;
  --sky-dawn: #f0f9ff;
  --sky-mist: #e2e8f0;
  
  /* 文本色彩 */
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  --text-inverse-muted: #cbd5e1;

  /* 表面色彩与玻璃质感 */
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --glass-surface: rgba(255, 255, 255, 0.88);
  --glass-dark: rgba(10, 30, 56, 0.85);
  --border-subtle: #e2e8f0;
  --border-light: rgba(255, 255, 255, 0.2);
  --border-focus: #0284c7;

  /* 阴影层级 */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-sky: 0 20px 25px -5px rgba(2, 132, 199, 0.15), 0 8px 10px -6px rgba(2, 132, 199, 0.1);

  /* 布局与圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --container-max: 1160px;
}

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

html {
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-page);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  width: 100%;
}

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

a {
  color: var(--sky-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--sky-azure);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 页面主要区域 */
main {
  flex: 1 0 auto;
}

/* --------------------------------------------------------------------------
   顶部导航栏 (Navbar)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 30, 56, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(56, 189, 248, 0.15);
  transition: background-color 0.3s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

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

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.brand-badge {
  font-size: 0.75rem;
  color: var(--sky-cyan);
  font-weight: 500;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-inverse-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 6px 4px;
  position: relative;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: #ffffff;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--sky-cyan);
  border-radius: 2px;
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--sky-blue), var(--sky-azure));
  color: #ffffff !important;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.25s ease;
  white-space: nowrap;
}

.header-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.5);
  filter: brightness(1.08);
}

/* 移动端汉堡切换按钮 */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: #ffffff;
}

.mobile-nav-toggle svg {
  width: 26px;
  height: 26px;
}

/* 移动端菜单抽屉 */
.mobile-menu {
  display: none;
  background: var(--sky-deep);
  border-bottom: 1px solid rgba(56, 189, 248, 0.2);
  padding: 16px 20px 24px;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
  list-style: none;
}

.mobile-menu-links .nav-link {
  font-size: 1.05rem;
  padding: 8px 0;
  display: block;
}

.mobile-cta-wrap {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-cta-wrap .header-cta-btn {
  width: 100%;
  text-align: center;
  padding: 12px;
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   天际蓝图 Skyline Hero 首屏区域与云层漂移动画
   -------------------------------------------------------------------------- */
.skyline-hero {
  position: relative;
  background: linear-gradient(175deg, var(--sky-space) 0%, var(--sky-deep) 30%, var(--sky-night) 60%, #1a4f8b 90%, #60a5fa 100%);
  color: #ffffff;
  padding: 90px 0 130px;
  overflow: hidden;
}

/* 云层漂移容器与动效 */
.clouds-drift-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.18;
  background-image: 
    radial-gradient(circle at 15% 75%, rgba(255,255,255,0.7) 0, transparent 40%),
    radial-gradient(circle at 35% 82%, rgba(255,255,255,0.85) 0, transparent 45%),
    radial-gradient(circle at 55% 70%, rgba(255,255,255,0.6) 0, transparent 38%),
    radial-gradient(circle at 75% 85%, rgba(255,255,255,0.8) 0, transparent 50%),
    radial-gradient(circle at 95% 75%, rgba(255,255,255,0.7) 0, transparent 40%);
  background-repeat: repeat-x;
  background-size: 50% 100%;
  animation: cloudDrift 75s linear infinite;
  transform: translate3d(0, 0, 0);
}

.clouds-drift-layer-secondary {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 200%;
  height: 60%;
  pointer-events: none;
  z-index: 2;
  opacity: 0.22;
  background-image: 
    radial-gradient(circle at 25% 90%, rgba(255,255,255,0.9) 0, transparent 35%),
    radial-gradient(circle at 45% 95%, rgba(255,255,255,0.75) 0, transparent 40%),
    radial-gradient(circle at 70% 88%, rgba(255,255,255,0.85) 0, transparent 45%),
    radial-gradient(circle at 90% 92%, rgba(255,255,255,0.7) 0, transparent 35%);
  background-repeat: repeat-x;
  background-size: 50% 100%;
  animation: cloudDriftSlow 110s linear infinite reverse;
}

@keyframes cloudDrift {
  0% { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(-50%, 0, 0); }
}

@keyframes cloudDriftSlow {
  0% { transform: translate3d(-50%, 0, 0); }
  100% { transform: translate3d(0, 0, 0); }
}

/* 居中品牌宣言 (Centered Brand Manifesto) */
.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-full);
  color: var(--sky-cyan);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.25;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-title span {
  background: linear-gradient(135deg, #ffffff 30%, var(--sky-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-manifesto {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--sky-mist);
  margin-bottom: 36px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
  color: #ffffff !important;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 25px -3px rgba(2, 132, 199, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.25);
  transition: all 0.25s ease;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -4px rgba(2, 132, 199, 0.7);
  filter: brightness(1.06);
}

.btn-outline-sky {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff !important;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(8px);
  transition: all 0.25s ease;
}

.btn-outline-sky:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.hero-notice-bar {
  margin-top: 32px;
  font-size: 0.875rem;
  color: #94a3b8;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* --------------------------------------------------------------------------
   三栏优势卡片 (Three-Column Advantage Cards)
   -------------------------------------------------------------------------- */
.skyline-pillars {
  position: relative;
  margin-top: -60px;
  z-index: 20;
  padding-bottom: 40px;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.pillar-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sky);
  border-color: var(--sky-soft);
}

.pillar-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--sky-dawn), #e0f2fe);
  color: var(--sky-azure);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  border: 1px solid var(--sky-soft);
}

.pillar-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.35;
}

.pillar-desc {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-secondary);
  flex-grow: 1;
}

.pillar-points {
  margin-top: 16px;
  list-style: none;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

.pillar-points li {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pillar-points li::before {
  content: '✓';
  color: var(--sky-blue);
  font-weight: bold;
}

/* --------------------------------------------------------------------------
   内容通用区块与标题
   -------------------------------------------------------------------------- */
.section {
  padding: 72px 0;
}

.section-alt {
  background-color: #f1f5f9;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sky-azure);
  background: var(--sky-dawn);
  border: 1px solid var(--sky-soft);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   套餐说明与判断指标模块 (Plans & Criteria)
   -------------------------------------------------------------------------- */
.plan-framework-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-md);
  margin-bottom: 40px;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.plan-item-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.25s ease;
}

.plan-item-card:hover {
  border-color: var(--sky-blue);
  box-shadow: var(--shadow-md);
}

.plan-tag-top {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  background: #e0f2fe;
  color: var(--sky-azure);
  margin-bottom: 12px;
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.plan-price-status {
  padding: 10px 14px;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  border: 1px dashed #cbd5e1;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.plan-price-status strong {
  color: var(--sky-azure);
}

.plan-features-list {
  list-style: none;
  margin-bottom: 24px;
  flex-grow: 1;
}

.plan-features-list li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid #f1f5f9;
  display: flex;
  justify-content: space-between;
}

.plan-features-list li span.label {
  color: var(--text-muted);
}

.plan-features-list li span.val {
  font-weight: 600;
  color: var(--text-primary);
}

.btn-card-action {
  display: block;
  text-align: center;
  background: #0284c7;
  color: #ffffff !important;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
}

.btn-card-action:hover {
  background: #0369a1;
}

/* 响应式数据表格容器 */
.table-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 24px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: #ffffff;
}

.table-custom {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.925rem;
  min-width: 600px;
}

.table-custom th {
  background: #f8fafc;
  padding: 14px 18px;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-subtle);
  white-space: nowrap;
}

.table-custom td {
  padding: 14px 18px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  line-height: 1.5;
}

.table-custom tr:last-child td {
  border-bottom: none;
}

.table-custom tr:hover td {
  background-color: #f0f9ff;
}

/* --------------------------------------------------------------------------
   文章网格与卡片 (Article Grid & Cards)
   -------------------------------------------------------------------------- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--sky-soft);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-card-category {
  color: var(--sky-azure);
  background: var(--sky-dawn);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.article-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-card-title a {
  color: var(--text-primary);
}

.article-card-title a:hover {
  color: var(--sky-blue);
}

.article-card-excerpt {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--sky-azure);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-card-link:hover {
  color: var(--sky-blue);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   文章内页排版 (Article Detail Page)
   -------------------------------------------------------------------------- */
.article-page-header {
  background: linear-gradient(175deg, var(--sky-space) 0%, var(--sky-deep) 60%, var(--sky-night) 100%);
  color: #ffffff;
  padding: 60px 0 80px;
  text-align: center;
}

.article-header-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--sky-soft);
  margin-bottom: 16px;
}

.article-page-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.3;
  max-width: 860px;
  margin: 0 auto 20px;
}

.article-breadcrumb {
  font-size: 0.875rem;
  color: #94a3b8;
  margin-bottom: 16px;
}

.article-breadcrumb a {
  color: var(--sky-cyan);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  margin-top: -30px;
  padding-bottom: 60px;
}

.article-body-container {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #1e293b;
}

.article-content h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 40px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--sky-dawn);
  position: relative;
}

.article-content h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 50px;
  height: 2px;
  background: var(--sky-blue);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-content p {
  margin-bottom: 18px;
}

.article-content ul, 
.article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  background: #f0f9ff;
  border-left: 4px solid var(--sky-blue);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  font-size: 0.95rem;
  color: var(--sky-night);
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-box {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-links {
  list-style: none;
}

.sidebar-links li {
  margin-bottom: 12px;
}

.sidebar-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.45;
  display: block;
}

.sidebar-links a:hover {
  color: var(--sky-azure);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   用户真实评价卡片区 (Testimonials Grid - 图二格式)
   -------------------------------------------------------------------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.testimonial-card {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sky);
  border-color: var(--sky-soft);
}

.stars-rating {
  display: flex;
  gap: 3px;
  color: #f59e0b;
  font-size: 1.15rem;
  margin-bottom: 18px;
  letter-spacing: 2px;
}

.testimonial-quote {
  font-size: 0.95rem;
  line-height: 1.75;
  color: #334155;
  flex-grow: 1;
  margin-bottom: 24px;
}

.testimonial-user-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid #f1f5f9;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e0f2fe, #bae6fd);
  color: var(--sky-azure);
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.testimonial-user-info {
  display: flex;
  flex-direction: column;
}

.testimonial-user-name {
  font-size: 1.025rem;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.3;
}

.testimonial-user-role {
  font-size: 0.8125rem;
  color: #64748b;
  line-height: 1.4;
  margin-top: 2px;
}

.feedback-trigger-wrap {
  text-align: center;
  margin-top: 36px;
}

.btn-toggle-feedback {
  background: #ffffff;
  border: 1px dashed var(--sky-blue);
  color: var(--sky-blue);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-toggle-feedback:hover {
  background: #f0f9ff;
  border-style: solid;
}

.feedback-drawer-box {
  display: none;
  max-width: 680px;
  margin: 24px auto 0;
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}

.feedback-drawer-box.open {
  display: block;
}

/* --------------------------------------------------------------------------
   用户反馈表单内部元素
   -------------------------------------------------------------------------- */
.feedback-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.feedback-intro {
  margin-bottom: 28px;
  text-align: center;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.feedback-intro h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.feedback-intro p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.feedback-form {
  max-width: 620px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-primary);
  background: #f8fafc;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--sky-blue);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

.form-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.btn-submit-feedback {
  background: var(--sky-blue);
  color: #ffffff;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.2s ease;
  align-self: flex-start;
}

.btn-submit-feedback:hover {
  background: var(--sky-azure);
}

.feedback-success-msg {
  display: none;
  padding: 16px;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  margin-top: 16px;
  text-align: center;
}

/* --------------------------------------------------------------------------
   FAQ 手风琴常见问题
   -------------------------------------------------------------------------- */
.faq-accordion {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item.open {
  border-color: var(--sky-blue);
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
}

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  transition: transform 0.25s ease;
  color: var(--sky-azure);
  flex-shrink: 0;
}

.faq-item.open .faq-icon-arrow {
  transform: rotate(180deg);
}

.faq-answer-pane {
  display: none;
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

/* --------------------------------------------------------------------------
   页脚 (Footer)
   -------------------------------------------------------------------------- */
.site-footer {
  background: #09182b;
  color: #94a3b8;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 30px;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-col p {
  margin-top: 14px;
  line-height: 1.65;
  color: #94a3b8;
  max-width: 320px;
}

.footer-col-title {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: #94a3b8;
  transition: color 0.2s ease;
}

.footer-links-list a:hover {
  color: var(--sky-cyan);
}

.footer-disclaimer-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: #64748b;
  margin-bottom: 30px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8125rem;
  color: #64748b;
}

/* --------------------------------------------------------------------------
   响应式断点适配 (Responsive Breakpoints)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .pillars-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-manifesto {
    font-size: 1rem;
  }
  .skyline-hero {
    padding: 60px 0 100px;
  }
  .skyline-pillars {
    margin-top: -40px;
  }
  .section {
    padding: 48px 0;
  }
  .section-title {
    font-size: 1.6rem;
  }
  .plan-framework-box {
    padding: 24px 18px;
  }
  .article-body-container {
    padding: 24px 18px;
  }
  .feedback-box {
    padding: 24px 18px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 14px;
    padding-right: 14px;
  }
  .hero-title {
    font-size: 1.7rem;
  }
  .btn-primary, .btn-outline-sky {
    width: 100%;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
}