/* -------------------------------------------------------------------------- */
/* 小鲤鱼机场 (xiaoliyu.sbs) 视觉设计系统 & 全局样式 (小鲤鱼水韵光效增强版)     */
/* -------------------------------------------------------------------------- */

:root {
  --bg-dark: #091428;
  --bg-card: rgba(13, 27, 54, 0.65);
  --bg-card-hover: rgba(22, 42, 80, 0.85);
  --border-color: rgba(255, 158, 0, 0.28);
  --border-glow: rgba(255, 158, 0, 0.6);
  
  --koi-gold: #ff9e00;
  --koi-red: #ff3b5c;
  --koi-cyan: #00f2fe;
  --koi-purple: #9d4edd;

  --text-main: #f0f4fc;
  --text-muted: #cbd5e1;
  --text-dim: #94a3b8;

  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

body {
  position: relative;
  min-height: 100vh;
  /* 拒绝纯黑！采用深海水韵与锦鲤金红晕光的充满生命的复合背景 */
  background: 
    radial-gradient(circle at 15% 15%, rgba(255, 158, 0, 0.18) 0%, transparent 45%),
    radial-gradient(circle at 85% 45%, rgba(255, 59, 92, 0.18) 0%, transparent 50%),
    radial-gradient(circle at 50% 85%, rgba(0, 242, 254, 0.15) 0%, transparent 50%),
    linear-gradient(180deg, #091326 0%, #0d213f 30%, #0a1930 65%, #050c18 100%);
  background-attachment: fixed;
}

body.modal-open {
  overflow: hidden;
}

/* 锦鲤水波纹背景纹理叠加 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: radial-gradient(rgba(255, 158, 0, 0.08) 1px, transparent 0);
  background-size: 36px 36px;
  pointer-events: none;
  z-index: -2;
  opacity: 0.7;
}

/* Dynamic Canvases */
#bg-koi-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

#cursor-trail-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
  pointer-events: none;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* -------------------------------------------------------------------------- */
/* 顶部导航 Header */
/* -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(9, 19, 38, 0.82);
  border-bottom: 1px solid rgba(255, 158, 0, 0.25);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
  font-weight: 800;
  font-size: 1.35rem;
}

.logo-icon {
  width: 38px;
  height: 38px;
  filter: drop-shadow(0 0 10px rgba(255, 59, 92, 0.6));
}

.logo-text span {
  background: linear-gradient(135deg, var(--koi-gold), var(--koi-red));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-left: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
}

.nav-links a:hover {
  color: var(--koi-gold);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--koi-gold), var(--koi-red));
  transition: var(--transition);
  border-radius: 2px;
}

.nav-links a:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 按钮通用系统 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--koi-gold) 0%, var(--koi-red) 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(255, 59, 92, 0.4);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transition: 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 59, 92, 0.6);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  background: rgba(255, 158, 0, 0.2);
  border-color: var(--koi-gold);
  color: var(--koi-gold);
  box-shadow: 0 0 15px rgba(255, 158, 0, 0.3);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.6rem;
  cursor: pointer;
}

/* -------------------------------------------------------------------------- */
/* Hero 主视觉区 */
/* -------------------------------------------------------------------------- */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  position: relative;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 22px;
  border-radius: 30px;
  background: rgba(255, 158, 0, 0.15);
  border: 1px solid rgba(255, 158, 0, 0.4);
  color: var(--koi-gold);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 24px;
  backdrop-filter: blur(12px);
  box-shadow: 0 0 20px rgba(255, 158, 0, 0.2);
}

.badge-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 12px #10b981;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { opacity: 0.4; }
  50% { opacity: 1; }
  100% { opacity: 0.4; }
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.hero-title-gradient {
  background: linear-gradient(135deg, #ffffff 0%, #ff9e00 40%, #ff3b5c 70%, #00f2fe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 40px;
  line-height: 1.85;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
}

.stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 24px 16px;
  border-radius: 18px;
  backdrop-filter: blur(14px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: 0 8px 30px rgba(255, 158, 0, 0.2);
}

.stat-item h3 {
  font-size: 2.1rem;
  font-weight: 900;
  color: #fff;
  margin-bottom: 4px;
  background: linear-gradient(135deg, #ffffff 30%, var(--koi-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-item p {
  color: var(--text-dim);
  font-size: 0.88rem;
  font-weight: 500;
}

/* -------------------------------------------------------------------------- */
/* 通用区块排版 */
/* -------------------------------------------------------------------------- */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 54px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--koi-gold);
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* -------------------------------------------------------------------------- */
/* 专线优势 Features */
/* -------------------------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 34px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(14px);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--koi-gold), var(--koi-red), var(--koi-cyan));
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 15px 40px rgba(255, 158, 0, 0.25);
  background: var(--bg-card-hover);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(255, 158, 0, 0.18);
  border: 1px solid rgba(255, 158, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.9rem;
  margin-bottom: 20px;
  color: var(--koi-gold);
  box-shadow: 0 0 15px rgba(255, 158, 0, 0.2);
}

.feature-card h3 {
  font-size: 1.35rem;
  margin-bottom: 12px;
  color: #ffffff;
  font-weight: 800;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* -------------------------------------------------------------------------- */
/* 【价格格式一排】 Horizontal Pricing Row System */
/* -------------------------------------------------------------------------- */
.pricing-wrapper {
  position: relative;
  width: 100%;
}

.pricing-row-container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: stretch;
  gap: 20px;
  width: 100%;
  overflow-x: auto;
  padding: 15px 5px 30px 5px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.pricing-row-container::-webkit-scrollbar {
  height: 8px;
}
.pricing-row-container::-webkit-scrollbar-track {
  background: rgba(255,255,255,0.08);
  border-radius: 10px;
}
.pricing-row-container::-webkit-scrollbar-thumb {
  background: linear-gradient(90deg, var(--koi-gold), var(--koi-red));
  border-radius: 10px;
}

.pricing-card {
  flex: 1 1 0%;
  min-width: 265px;
  scroll-snap-align: start;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 34px 24px;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(16px);
  transition: var(--transition);
  position: relative;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--koi-gold);
  box-shadow: 0 12px 35px rgba(255, 158, 0, 0.3);
}

.pricing-card.popular {
  border-color: var(--koi-gold);
  background: rgba(22, 42, 80, 0.85);
  box-shadow: 0 0 45px rgba(255, 158, 0, 0.35);
  transform: scale(1.02);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--koi-gold), var(--koi-red));
  color: #fff;
  font-size: 0.78rem;
  font-weight: 900;
  padding: 5px 18px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 4px 15px rgba(255, 59, 92, 0.5);
}

.pricing-card-header {
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.pricing-plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--koi-gold);
  line-height: 1;
  text-shadow: 0 0 12px rgba(255, 158, 0, 0.4);
}

.pricing-price span {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  flex: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.pricing-features li i {
  color: #10b981;
  font-style: normal;
  font-weight: bold;
}

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

/* -------------------------------------------------------------------------- */
/* SEO 文章展示 Grid */
/* -------------------------------------------------------------------------- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  text-decoration: none;
  color: var(--text-main);
  backdrop-filter: blur(14px);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--koi-cyan);
  box-shadow: 0 12px 35px rgba(0, 242, 254, 0.25);
  background: var(--bg-card-hover);
}

.article-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.tag {
  background: rgba(0, 242, 254, 0.15);
  color: var(--koi-cyan);
  border: 1px solid rgba(0, 242, 254, 0.35);
  padding: 4px 12px;
  border-radius: 14px;
  font-size: 0.78rem;
  font-weight: 700;
}

.article-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.4;
  color: #ffffff;
}

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 20px;
  flex: 1;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 14px;
}

/* -------------------------------------------------------------------------- */
/* 用户评价 Testimonials */
/* -------------------------------------------------------------------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 30px;
  border-radius: 22px;
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.user-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--koi-gold), var(--koi-red));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  color: #fff;
  box-shadow: 0 0 15px rgba(255, 158, 0, 0.4);
}

.user-details h4 {
  font-size: 1.05rem;
  color: #fff;
  font-weight: 800;
}

.user-details p {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.star-rating {
  color: #fbbf24;
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.testimonial-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* -------------------------------------------------------------------------- */
/* 常见问题 FAQ */
/* -------------------------------------------------------------------------- */
.faq-container {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(14px);
  box-shadow: 0 6px 25px rgba(0,0,0,0.3);
}

.faq-item:hover {
  border-color: var(--border-glow);
}

.faq-question {
  width: 100%;
  padding: 24px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.5rem;
  color: var(--koi-gold);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--koi-red);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 30px;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 350px;
  padding: 0 30px 24px;
}

/* -------------------------------------------------------------------------- */
/* 页脚 & PBN 权重输血管道 Footer */
/* -------------------------------------------------------------------------- */
.footer {
  background: #040914;
  border-top: 1px solid rgba(255, 158, 0, 0.25);
  padding: 60px 0 30px;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  margin-top: 14px;
  font-size: 0.9rem;
  color: var(--text-dim);
  max-width: 340px;
  line-height: 1.7;
}

.footer-column h4 {
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 18px;
  font-weight: 800;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.footer-links a:hover {
  color: var(--koi-gold);
}

.pbn-backlink-section {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  margin-top: 20px;
  text-align: center;
}

.pbn-title {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 14px;
  opacity: 0.85;
}

.pbn-links-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 22px;
  font-size: 0.82rem;
}

.pbn-links-grid a {
  color: rgba(203, 213, 225, 0.75);
  text-decoration: none;
  transition: color 0.2s ease;
}

.pbn-links-grid a:hover {
  color: var(--koi-gold);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  margin-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* -------------------------------------------------------------------------- */
/* 客户端下载引导弹窗 (Download Modal) - Mobile First & Accessible */
/* -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(3, 7, 18, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: linear-gradient(145deg, rgba(13, 27, 54, 0.98), rgba(9, 20, 40, 0.98));
  border: 1px solid var(--border-glow);
  border-radius: 24px;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  max-height: 90dvh;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), 0 0 35px rgba(255, 158, 0, 0.25);
  transform: translateY(20px) scale(0.97);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.modal-overlay.active .modal-container {
  transform: translateY(0) scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 10;
}

.modal-close-btn:hover,
.modal-close-btn:focus-visible {
  background: rgba(255, 59, 92, 0.25);
  color: #fff;
  border-color: var(--koi-red);
  outline: none;
}

.modal-body {
  padding: 32px 24px 28px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.modal-header-section {
  text-align: center;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
  line-height: 1.3;
}

.modal-subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.download-options {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 22px;
}

.download-btn-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  color: var(--text-main);
  text-decoration: none;
  min-height: 44px;
  transition: var(--transition);
}

.download-btn-card:hover,
.download-btn-card:focus-visible {
  background: rgba(255, 158, 0, 0.15);
  border-color: var(--koi-gold);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 158, 0, 0.25);
  outline: none;
}

.download-icon {
  font-size: 2rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-info {
  flex: 1;
  text-align: left;
}

.download-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.download-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
  font-weight: 600;
}

.download-desc {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.download-arrow {
  font-size: 1.2rem;
  color: var(--koi-gold);
  transition: transform 0.2s ease;
}

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

.modal-notice-box {
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
}

.modal-footer-nav {
  text-align: center;
  font-size: 0.85rem;
}

.modal-footer-nav a {
  color: var(--koi-gold);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.modal-footer-nav a:hover {
  text-decoration: underline;
}

/* -------------------------------------------------------------------------- */
/* 全面强化移动端响应式 (Mobile-First Responsive Adjustments) */
/* -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .hero-title { font-size: clamp(2rem, 5vw, 2.7rem); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media (max-width: 768px) {
  .header-inner {
    height: 70px;
  }
  
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(9, 20, 40, 0.98);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    max-height: calc(100vh - 70px);
    max-height: calc(100dvh - 70px);
    overflow-y: auto;
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-links li {
    width: 100%;
  }
  
  .nav-links a {
    display: block;
    padding: 12px 0;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    min-height: 44px;
  }
  
  .header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  
  .header-actions .btn {
    padding: 8px 16px;
    font-size: 0.88rem;
  }
  
  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    padding: 6px;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.8rem;
    cursor: pointer;
  }
  
  .hero {
    padding: 110px 0 60px;
  }
  
  .hero-title {
    font-size: clamp(1.8rem, 6.5vw, 2.3rem);
    letter-spacing: normal;
  }
  
  .hero-subtitle {
    font-size: 0.98rem;
    margin-bottom: 28px;
    padding: 0 4px;
  }
  
  .hero-cta-group {
    flex-direction: column;
    gap: 14px;
    width: 100%;
    margin-bottom: 40px;
  }
  
  .hero-cta-group .btn {
    width: 100%;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .stat-item {
    padding: 16px 12px;
  }
  
  .stat-item h3 {
    font-size: 1.6rem;
  }
  
  .stat-item p {
    font-size: 0.8rem;
  }

  /* 套餐卡片：移动端舒适比较 */
  .pricing-row-container {
    padding: 10px 4px 20px 4px;
    gap: 16px;
  }
  
  .pricing-card {
    min-width: 82vw;
    padding: 26px 18px;
    border-radius: 20px;
  }
  
  .pricing-card.popular {
    transform: none;
  }
  
  .pricing-card .btn {
    min-height: 44px;
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  
  .article-body {
    padding: 20px;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-brand p {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .header-actions .btn {
    display: none;
  }
  
  .pricing-card {
    min-width: 86vw;
  }
  
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  
  .stat-item {
    padding: 12px 8px;
  }
  
  .stat-item h3 {
    font-size: 1.4rem;
  }
  
  .modal-container {
    border-radius: 20px;
    max-height: 94dvh;
  }
  
  .modal-body {
    padding: 24px 16px 20px;
  }
  
  .modal-title {
    font-size: 1.25rem;
  }
  
  .modal-subtitle {
    font-size: 0.85rem;
  }
  
  .download-btn-card {
    padding: 12px 14px;
  }
}