/* ==========================================================================
   番茄云 (TomatoCloud) 官方落地页样式系统
   Domain: tomatocloud.cfd
   Theme: Cyber Emerald & Mint Green Tomato (青番茄/翡翠绿高定极客风)
   ========================================================================== */

:root {
  --primary-emerald: #10B981;
  --primary-mint: #34D399;
  --primary-hover: #059669;
  --accent-cyan: #06B6D4;
  --accent-gold: #F59E0B;
  
  --bg-dark: #070A12;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(22, 33, 58, 0.9);
  --border-color: rgba(16, 185, 129, 0.2);
  --border-glow: rgba(16, 185, 129, 0.5);
  
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  
  --font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --shadow-glow: 0 10px 30px -10px rgba(16, 185, 129, 0.35);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(6, 182, 212, 0.06) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Mouse Trail Canvas */
#cursor-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 99999;
}

/* Layout Container */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  color: #FFFFFF;
  font-weight: 700;
  line-height: 1.25;
}

.text-gradient {
  background: linear-gradient(135deg, #34D399 0%, #10B981 50%, #06B6D4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 99px;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-emerald), var(--accent-cyan));
  color: #FFF;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.6);
  background: linear-gradient(135deg, var(--primary-mint), #0891B2);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(16, 185, 129, 0.5);
  color: var(--primary-mint);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: var(--transition);
  background: rgba(7, 10, 18, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font-size: 1.4rem;
  font-weight: 800;
  color: #FFF;
}

.logo-icon {
  width: 38px;
  height: 38px;
  filter: drop-shadow(0 2px 8px rgba(16, 185, 129, 0.5));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--primary-mint);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #FFF;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Mobile Nav Overlay */
.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  background: rgba(7, 10, 18, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem;
  flex-direction: column;
  gap: 1.2rem;
  z-index: 999;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  color: var(--text-main);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 600;
}

/* Hero Section */
.hero {
  padding: 10rem 0 5rem;
  text-align: center;
  position: relative;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: 99px;
  color: var(--primary-mint);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 3.2rem;
  letter-spacing: -1px;
  margin-bottom: 1.2rem;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 2.5rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
}

.stat-item h3 {
  font-size: 2rem;
  color: var(--primary-mint);
}

.stat-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header h2 {
  font-size: 2.2rem;
  margin-bottom: 0.8rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 6rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.feature-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(16, 185, 129, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--primary-mint);
  margin-bottom: 1.2rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* PRICING SECTION - HORIZONTAL ROW FORMAT (价格一排展示) */
.pricing-section {
  padding: 5rem 0;
  position: relative;
}

.pricing-row-wrapper {
  width: 100%;
  overflow-x: auto;
  padding-bottom: 1rem;
  -webkit-overflow-scrolling: touch;
}

.pricing-row {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: stretch;
  gap: 1.2rem;
  width: 100%;
}

.pricing-card {
  flex: 1 1 0;
  min-width: 250px;
  max-width: 290px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(16px);
}

.pricing-card.popular {
  border-color: var(--primary-emerald);
  background: rgba(13, 36, 43, 0.85);
  box-shadow: 0 0 30px rgba(16, 185, 129, 0.25);
  transform: scale(1.03);
}

.pricing-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--primary-mint);
  box-shadow: var(--shadow-glow);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-emerald), var(--accent-cyan));
  color: #FFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.8rem;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.plan-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 38px;
  margin-bottom: 1.2rem;
}

.plan-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: #FFF;
  margin-bottom: 1.5rem;
}

.plan-price span {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
}

.plan-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.plan-features li {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.plan-features li::before {
  content: "✓";
  color: var(--primary-mint);
  font-weight: bold;
}

.pricing-card .btn {
  width: 100%;
}

/* SEO Articles Section */
.articles-section {
  padding: 5rem 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}

.article-body {
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-tag {
  font-size: 0.75rem;
  color: var(--primary-mint);
  background: rgba(16, 185, 129, 0.12);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 0.8rem;
  width: fit-content;
  font-weight: 600;
}

.article-title {
  font-size: 1.15rem;
  margin-bottom: 0.8rem;
  line-height: 1.4;
}

.article-title a {
  color: #FFF;
  text-decoration: none;
  transition: var(--transition);
}

.article-title a:hover {
  color: var(--primary-mint);
}

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
  line-height: 1.6;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.read-more {
  color: var(--primary-mint);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

/* Single Article Detail Page Styling */
.article-page {
  padding-top: 8rem;
  padding-bottom: 5rem;
}

.article-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem;
  backdrop-filter: blur(16px);
}

.article-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 2rem;
}

.article-header h1 {
  font-size: 2.4rem;
  margin: 1rem 0;
  line-height: 1.3;
}

.article-content {
  color: var(--text-main);
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-content h2 {
  font-size: 1.6rem;
  margin: 2rem 0 1rem;
  color: var(--primary-mint);
  border-left: 4px solid var(--primary-mint);
  padding-left: 0.8rem;
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 1.5rem 0 0.8rem;
}

.article-content p {
  margin-bottom: 1.2rem;
  color: #D1D5DB;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
  color: #D1D5DB;
}

.cta-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.05));
  border: 1px solid var(--primary-emerald);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  margin: 2.5rem 0;
}

.cta-box h3 {
  font-size: 1.4rem;
  margin-bottom: 0.8rem;
}

/* FAQ Section */
.faq-section {
  padding: 5rem 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.faq-question {
  padding: 1.2rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: #FFF;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--primary-mint);
  transition: var(--transition);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 1.5rem 1.2rem 1.5rem;
}

/* Testimonials Section */
.testimonials-section {
  padding: 5rem 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
}

.stars {
  color: var(--accent-gold);
  margin-bottom: 0.8rem;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1.2rem;
}

.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-emerald), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: #FFF;
}

.user-info h4 {
  font-size: 0.95rem;
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* CORE TASK 2: FOOTER PBN SECTION (精准输血管道) */
footer.site-footer {
  background: rgba(5, 8, 14, 0.95);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: #FFF;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary-mint);
}

/* PBN Friendly Links Zone (权重精准输血管道) */
.pbn-links-zone {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.pbn-links-title {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.8rem;
  font-weight: 600;
}

.pbn-links-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem 1.2rem;
}

.pbn-links-container a {
  font-size: 0.75rem;
  color: rgba(240, 244, 248, 0.45);
  text-decoration: none;
  transition: var(--transition);
}

.pbn-links-container a:hover {
  color: var(--primary-mint);
  text-decoration: underline;
}

.copyright {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 1.5rem;
}

/* ==========================================================================
   DOWNLOAD MODAL COMPONENT (下载弹窗)
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: rgba(3, 7, 18, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  padding: 1rem;
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.modal-box {
  position: relative;
  background: #0B1120;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.98) 0%, rgba(10, 16, 31, 0.98) 100%);
  border: 1px solid rgba(16, 185, 129, 0.35);
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.8), 0 0 35px rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-lg);
  max-width: 480px;
  width: 100%;
  max-height: calc(100dvh - 2rem);
  overflow-y: auto;
  padding: 2.2rem 2rem 2rem;
  transform: translateY(15px) scale(0.97);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.active .modal-box {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-muted);
  width: 38px;
  height: 38px;
  min-width: 38px;
  min-height: 38px;
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.5);
  color: #EF4444;
}

.modal-header {
  text-align: center;
  margin-bottom: 1.8rem;
}

.modal-icon {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
  filter: drop-shadow(0 2px 8px rgba(16, 185, 129, 0.5));
}

.modal-header h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #FFF;
}

.modal-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.modal-platforms {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.platform-btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.2rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition);
  min-height: 48px;
}

.platform-btn:hover {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--primary-mint);
  transform: translateY(-2px);
}

.platform-btn .platform-icon {
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform-text {
  flex-grow: 1;
  text-align: left;
}

.platform-text strong {
  display: block;
  font-size: 1.05rem;
  color: #FFF;
  margin-bottom: 0.2rem;
}

.platform-text small {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.platform-arrow {
  font-size: 1.3rem;
  color: var(--primary-mint);
  transition: var(--transition);
}

.platform-btn:hover .platform-arrow {
  transform: translateX(4px);
}

.modal-footer-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1rem;
}

.modal-footer-note a {
  color: var(--primary-mint);
  text-decoration: underline;
}

/* ==========================================================================
   DOWNLOAD CENTER PAGE STYLES (下载中心页面)
   ========================================================================== */
.download-page {
  padding-top: 8rem;
  padding-bottom: 5rem;
}

.download-hero {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3.5rem;
}

.download-hero h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
}

.download-hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto 4rem;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.download-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-mint);
  box-shadow: var(--shadow-glow);
}

.download-platform-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.download-card h2 {
  font-size: 1.6rem;
  margin-bottom: 0.4rem;
}

.platform-meta {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.platform-features {
  list-style: none;
  text-align: left;
  width: 100%;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.platform-features li {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
  padding-left: 1.5rem;
  position: relative;
}

.platform-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary-mint);
  font-weight: bold;
}

.download-action-wrap {
  width: 100%;
}

.download-btn {
  width: 100%;
  padding: 0.95rem 1.5rem;
  font-size: 1.05rem;
}

.download-guide-section {
  max-width: 1050px;
  margin: 0 auto 4rem;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.5rem;
  position: relative;
}

.step-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-mint);
  opacity: 0.7;
  margin-bottom: 0.5rem;
}

.step-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
  color: #FFF;
}

.step-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   MOBILE-FIRST RESPONSIVE DESIGN (全设备适配优化)
   ========================================================================== */

/* 触摸目标最小高度保障 (无障碍规范 44px) */
.btn, .nav-toggle, .modal-close, .platform-btn {
  min-height: 44px;
}

/* 平板与中小笔记本 (1024px及以下) */
@media (max-width: 1024px) {
  .pricing-row-wrapper {
    overflow-x: visible;
  }
  .pricing-row {
    flex-wrap: wrap;
    justify-content: center;
  }
  .pricing-card {
    flex: 1 1 calc(50% - 1.5rem);
    min-width: 260px;
    max-width: 480px;
  }
}

/* 手机端主流与平板横屏 (768px及以下) */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  .container {
    padding: 0 1rem;
  }
  .navbar {
    padding: 0.75rem 0;
  }
  .logo {
    font-size: 1.2rem;
  }
  .logo-icon {
    width: 32px;
    height: 32px;
  }
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
  }
  .mobile-menu {
    top: 60px;
  }

  .hero {
    padding: 7rem 0 3.5rem;
  }
  .hero h1 {
    font-size: 2.1rem;
    word-break: break-word;
  }
  .hero p {
    font-size: 1rem;
    padding: 0 0.5rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
    gap: 0.8rem;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    padding: 1.2rem 1rem;
    gap: 1rem;
  }
  .stat-item h3 {
    font-size: 1.5rem;
  }
  .stat-item p {
    font-size: 0.8rem;
  }

  /* 套餐手机端单列排版 */
  .pricing-row {
    flex-direction: column;
    align-items: stretch;
  }
  .pricing-card {
    min-width: 100%;
    max-width: 100%;
    transform: none !important;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }
  .article-container {
    padding: 1.5rem 1rem;
  }
  .article-header h1 {
    font-size: 1.7rem;
  }

  .download-page {
    padding-top: 6.5rem;
  }
  .download-hero h1 {
    font-size: 2rem;
  }
  .download-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .download-card {
    padding: 2rem 1.2rem;
  }
}

/* 小屏与紧凑型手机 (480px / 375px / 360px / 320px) */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  .container {
    padding: 0 0.85rem;
  }
  .hero h1 {
    font-size: 1.75rem;
    line-height: 1.3;
  }
  .section-header h2 {
    font-size: 1.6rem;
  }
  .stat-item h3 {
    font-size: 1.3rem;
  }
  .plan-price {
    font-size: 1.8rem;
  }
  .modal-box {
    padding: 1.8rem 1.2rem 1.5rem;
  }
  .modal-header h3 {
    font-size: 1.2rem;
  }
  .modal-subtitle {
    font-size: 0.82rem;
  }
  .platform-btn {
    padding: 0.85rem 1rem;
  }
  .platform-btn .platform-icon {
    font-size: 1.6rem;
  }
  .footer-links {
    gap: 1rem;
  }
  .pbn-links-container {
    gap: 0.6rem 0.8rem;
  }
}

/* 针对极致窄屏 (320px) 防溢出 */
@media (max-width: 320px) {
  .logo span {
    font-size: 1rem;
  }
  .badge-tag span {
    font-size: 0.75rem;
  }
  .hero-stats {
    grid-template-columns: 1fr;
  }
}

/* 针对减弱动态效果 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}