/* 雪橇云机场 (Xueqiao Cloud Subscriptions) - Immersive Misty Nature Green Design System (Image 2 Exact Reference) */
@import url('https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;1,6..72,400;1,6..72,500&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Image 2 精确自然森林与薄雾绿色调盘 */
  --bg-dark-forest: #1e2b1f;
  --bg-deep-green: #142115;
  --bg-overlay-green: rgba(20, 33, 21, 0.78);
  
  --color-text-white: #ffffff;
  --color-text-muted: rgba(255, 255, 255, 0.72);
  --color-text-subtle: rgba(255, 255, 255, 0.55);
  
  --color-accent-lime: #4ade80;
  --color-accent-mint: #a7f3d0;

  /* 微磨砂与极致边框 */
  --border-glass: 1px solid rgba(255, 255, 255, 0.14);
  --border-subtle-line: rgba(255, 255, 255, 0.18);

  --radius-card: 24px;
  --radius-pill: 9999px;

  /* 字体系统 */
  --font-serif: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-deep-green);
  color: var(--color-text-white);
  line-height: 1.65;
  overflow-x: hidden;
}

a {
  color: var(--color-text-white);
  text-decoration: none;
  transition: all 0.25s ease;
}

a:hover {
  color: var(--color-accent-mint);
}

/* 沉浸式自然森林背景容器 (Full-bleed Natural Background) */
.page-background-wrapper {
  position: relative;
  width: 100%;
  min-height: 100vh;
  background: linear-gradient(180deg, rgba(20, 33, 21, 0.75) 0%, rgba(15, 25, 16, 0.88) 100%),
              url('https://images.unsplash.com/photo-1448375240586-882707db888b?auto=format&fit=crop&w=2400&q=80') center/cover fixed;
}

/* 顶部通栏 Pill Navbar (Sticky Top Fixed) */
.navbar-wrapper {
  position: sticky;
  top: 0;
  z-index: 1000;
  max-width: 1240px;
  margin: 0 auto;
  padding: 16px 20px 0 20px;
}

.navbar {
  padding: 14px 32px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: var(--border-glass);
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.35rem;
  color: #ffffff;
}

.brand-icon-svg {
  width: 28px;
  height: 28px;
  color: #ffffff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.nav-cta {
  background: #ffffff;
  color: var(--bg-deep-green) !important;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s ease;
}

.nav-cta:hover {
  background: var(--color-accent-lime);
  color: var(--bg-deep-green) !important;
  transform: translateY(-2px);
}

/* ==========================================================================
   Hero Section (EXACT REPLICATION OF IMAGE 2)
   ========================================================================== */
.hero-image2-container {
  max-width: 1240px;
  margin: 60px auto 100px auto;
  padding: 0 20px;
}

.hero-image2-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 80px;
}

.hero-image2-headline {
  max-width: 780px;
}

.hero-image2-headline h1 {
  font-size: 3.6rem;
  line-height: 1.15;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-image2-headline h1 span.italic-serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: #ffffff;
}

.hero-image2-subtitle {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  font-weight: 400;
  line-height: 1.6;
}

.hero-image2-button-box {
  flex-shrink: 0;
  padding-top: 12px;
}

.btn-pill-white {
  background: #ffffff;
  color: var(--bg-deep-green);
  font-size: 1rem;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
}

.btn-pill-white:hover {
  background: var(--color-accent-lime);
  color: var(--bg-deep-green);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(74, 222, 128, 0.3);
}

/* 底部 3 列特征：薄线分割 + 白色矢量极简图标 + 粗体白字 + 2行说明 (Image 2 Bottom Row) */
.hero-image2-bottom-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--border-subtle-line);
}

.hero-image2-feat-item {
  display: flex;
  flex-direction: column;
}

.hero-image2-icon-svg {
  width: 32px;
  height: 32px;
  color: #ffffff;
  stroke-width: 1.5;
  margin-bottom: 20px;
}

.hero-image2-feat-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 10px;
}

.hero-image2-feat-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 通用 Container & Headers */
.section-wrapper {
  max-width: 1240px;
  margin: 0 auto 100px auto;
  padding: 0 20px;
}

.section-header-clean {
  margin-bottom: 56px;
}

.section-tag-pill {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  border: var(--border-glass);
  color: var(--color-text-white);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

.section-title-clean {
  font-size: 2.6rem;
  font-weight: 600;
  color: #ffffff;
  line-height: 1.2;
}

.section-title-clean span.italic-serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}

.section-desc-clean {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-top: 12px;
}

/* 核心优势 Horizontal Grid (Design Ref Image 4 & 5) */
.ways-glass-container {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: var(--border-glass);
  border-radius: 32px;
  padding: 56px 48px;
}

.ways-grid-4col {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.way-col-item {
  padding: 0 28px;
  border-right: 1px solid var(--border-subtle-line);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.way-col-item:first-child {
  padding-left: 0;
}

.way-col-item:last-child {
  padding-right: 0;
  border-right: none;
}

.way-icon-line {
  width: 30px;
  height: 30px;
  color: #ffffff;
  margin-bottom: 24px;
}

.way-col-item h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 10px;
}

.way-col-item p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}

.way-link-clean {
  font-size: 0.88rem;
  font-weight: 600;
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.way-link-clean:hover {
  color: var(--color-accent-lime);
  gap: 10px;
}

/* Pricing Grid Cards (Minimalist Image 2 Style) */
.pricing-grid-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card-glass {
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(24px);
  border: var(--border-glass);
  border-radius: var(--radius-card);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

.pricing-card-glass:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-5px);
}

.pricing-card-glass.featured-card {
  background: rgba(255, 255, 255, 0.16);
  border: 1.5px solid var(--color-accent-lime);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.pricing-card-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 8px;
  font-family: var(--font-serif);
}

.pricing-card-sub {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  min-height: 40px;
}

.pricing-card-price {
  font-size: 2.6rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.pricing-card-price span.period {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.pricing-features-list {
  list-style: none;
  margin-bottom: 32px;
}

.pricing-features-list li {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-subtle-line);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-features-list li::before {
  content: '✓';
  color: var(--color-accent-lime);
  font-weight: 700;
}

.btn-card-action {
  width: 100%;
  text-align: center;
  background: #ffffff;
  color: var(--bg-deep-green);
  padding: 14px 20px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.25s ease;
}

.btn-card-action:hover {
  background: var(--color-accent-lime);
  color: var(--bg-deep-green);
}

.pricing-card-glass.featured-card .btn-card-action {
  background: var(--color-accent-lime);
  color: var(--bg-deep-green);
}

.pricing-card-glass.featured-card .btn-card-action:hover {
  background: #ffffff;
}

.pricing-bottom-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  margin-top: 48px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* 协议与支付 Cards */
.info-glass-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 50px;
}

.info-glass-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px);
  border: var(--border-glass);
  border-radius: var(--radius-card);
  padding: 32px;
}

.info-glass-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.info-glass-header h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #ffffff;
  font-family: var(--font-serif);
}

.protocol-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.protocol-pill-item {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border: var(--border-glass);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
}

/* Testimonials (Image 3 Ref) */
.testi-grid-3col {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1.1fr;
  gap: 24px;
  align-items: stretch;
}

.testi-card-glass {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px);
  border: var(--border-glass);
  border-radius: var(--radius-card);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.rating-num-big {
  font-size: 3.5rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.rating-num-big span.sub {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.rating-verified {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-top: 6px;
  margin-bottom: 24px;
}

.testi-image-bg-card {
  border-radius: var(--radius-card);
  background: linear-gradient(180deg, rgba(20, 33, 21, 0.3) 0%, rgba(10, 20, 11, 0.95) 100%),
              url('https://images.unsplash.com/photo-1506744038136-46273834b3fb?auto=format&fit=crop&w=800&q=80') center/cover;
  padding: 36px 30px;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border: var(--border-glass);
  min-height: 420px;
}

.testi-mini-glass {
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(16px);
  border: var(--border-glass);
  border-radius: 20px;
  padding: 22px 24px;
  margin-bottom: 16px;
}

.testi-mini-glass:last-child {
  margin-bottom: 0;
}

/* Articles Cards (Image 2 Style 2-Column Grid) */
.articles-grid-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-glass-card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px);
  border: var(--border-glass);
  border-radius: var(--radius-card);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

.article-glass-card:hover {
  background: rgba(255, 255, 255, 0.11);
  transform: translateY(-4px);
}

.article-glass-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 12px;
  font-family: var(--font-serif);
}

.article-glass-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

/* FAQ Accordion */
.faq-item-glass {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px);
  border: var(--border-glass);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 16px;
}

.faq-question-glass {
  padding: 22px 28px;
  font-size: 1.125rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-question-glass::after {
  content: '+';
  font-size: 1.5rem;
  color: #ffffff;
  transition: transform 0.3s ease;
}

.faq-item-glass.open .faq-question-glass::after {
  transform: rotate(45deg);
}

.faq-answer-glass {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 28px;
  font-size: 0.98rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.faq-item-glass.open .faq-answer-glass {
  max-height: 400px;
  padding: 0 28px 24px 28px;
}

/* Article Page Typography Container (Unified Misty Glass Container) */
.article-container {
  max-width: 920px;
  margin: 50px auto 100px auto;
  padding: 56px 42px;
  background: rgba(20, 33, 21, 0.85);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: var(--border-glass);
  border-radius: 32px;
  color: #ffffff;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
}

.article-header {
  margin-bottom: 40px;
  padding-bottom: 28px;
  border-bottom: 1px dashed var(--border-subtle-line);
}

.article-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.28;
  margin-bottom: 16px;
  font-family: var(--font-sans);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.88);
}

.article-body h2 {
  font-size: 1.7rem;
  font-weight: 600;
  color: #ffffff;
  margin: 44px 0 18px 0;
  padding-left: 16px;
  border-left: 4px solid var(--color-accent-lime);
  font-family: var(--font-serif);
}

.article-body h3 {
  font-size: 1.35rem;
  font-weight: 600;
  color: #ffffff;
  margin: 30px 0 14px 0;
  font-family: var(--font-serif);
}

.article-body p {
  margin-bottom: 20px;
}

.article-table-wrapper {
  overflow-x: auto;
  margin: 32px 0;
}

.article-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: var(--border-glass);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
}

.article-table th {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  font-weight: 600;
  padding: 14px 18px;
  text-align: left;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border-subtle-line);
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

.step-box, .checklist-box {
  background: rgba(255, 255, 255, 0.06);
  border: 1.5px solid var(--color-accent-lime);
  border-radius: 20px;
  padding: 26px;
  margin: 32px 0;
}

.step-box h4, .checklist-box h4 {
  font-size: 1.15rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 14px;
  font-family: var(--font-serif);
}

/* Footer Section */
.footer {
  padding: 80px 20px 40px 20px;
  border-top: 1px solid var(--border-subtle-line);
  background: rgba(10, 18, 11, 0.6);
}

.footer-inner-wrapper {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 20px;
  font-family: var(--font-serif);
}

.footer-col p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

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

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

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.footer-links a:hover {
  color: #ffffff;
}

.subscribe-input-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.1);
  border: var(--border-glass);
  border-radius: var(--radius-pill);
  padding: 4px 4px 4px 16px;
  margin-top: 16px;
}

.subscribe-input-box input {
  background: transparent;
  border: none;
  outline: none;
  color: #ffffff;
  font-size: 0.88rem;
  width: 100%;
}

.subscribe-input-box input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.subscribe-input-box button {
  background: #ffffff;
  color: var(--bg-deep-green);
  font-weight: 700;
  border: none;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.25s ease;
}

.subscribe-input-box button:hover {
  background: var(--color-accent-lime);
}

.footer-bottom-bar {
  max-width: 1240px;
  margin: 0 auto;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  color: var(--color-text-subtle);
}

/* Responsive */
@media (max-width: 992px) {
  .hero-image2-top {
    flex-direction: column;
  }
  .hero-image2-bottom-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .ways-grid-4col {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .way-col-item {
    border-right: none;
    padding: 0;
  }
  .pricing-grid-3col, .testi-grid-3col {
    grid-template-columns: 1fr;
  }
  .footer-inner-wrapper {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .articles-grid-2col {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .hero-image2-headline h1 {
    font-size: 2.5rem;
  }
  .ways-grid-4col {
    grid-template-columns: 1fr;
  }
  .footer-inner-wrapper {
    grid-template-columns: 1fr;
  }
  .footer-bottom-bar {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* GEO (Generative Engine Optimization) AI Summary Box */
.geo-summary-box {
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(74, 222, 128, 0.35);
  border-radius: 20px;
  padding: 24px 28px;
  margin-bottom: 36px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.geo-summary-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent-lime);
  background: rgba(74, 222, 128, 0.12);
  padding: 4px 14px;
  border-radius: 9999px;
  margin-bottom: 10px;
}

.geo-summary-title {
  font-size: 1.18rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 8px;
  font-family: var(--font-serif);
}

.geo-summary-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}