/* styles.css - 守候网络官方落地页核心样式表 */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&family=Noto+Sans+SC:wght@300;400;700&display=swap');

:root {
  --bg-primary: #07050f;
  --bg-secondary: rgba(18, 14, 34, 0.6);
  --bg-card: rgba(25, 20, 48, 0.45);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(255, 107, 0, 0.2);
  
  --color-gold: #ffb700;
  --color-orange: #ff5e00;
  --color-purple: #8222ff;
  --color-cyan: #00f0ff;
  --color-text-main: #f3f1f9;
  --color-text-sub: #a49ebd;
  
  --font-title: 'Outfit', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', sans-serif;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* 基础重置 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--color-text-main);
  font-family: var(--font-body);
  overflow-x: hidden;
}

body {
  position: relative;
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 宇宙星空背景层 */
.stars-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background: radial-gradient(circle at 50% 50%, #11092c 0%, #07050f 100%);
  overflow: hidden;
}

.stars-bg::after {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background-image: 
    radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px),
    radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px),
    radial-gradient(white, rgba(255,255,255,.1) 2px, transparent 20px);
  background-size: 550px 550px, 350px 350px, 250px 250px;
  background-position: 0 0, 40px 60px, 130px 270px;
  opacity: 0.18;
  animation: bgRotate 180s linear infinite;
}

@keyframes bgRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 霓虹发光晕圈 */
.nebula-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(130, 34, 255, 0.15) 0%, rgba(255, 94, 0, 0.05) 50%, transparent 100%);
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}

.glow-top-right {
  top: -200px;
  right: -100px;
  animation: floatLight 20s ease-in-out infinite alternate;
}

.glow-bottom-left {
  bottom: -200px;
  left: -100px;
  animation: floatLight 25s ease-in-out infinite alternate-reverse;
}

@keyframes floatLight {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(80px, 50px) scale(1.2); }
}

/* 导航栏 */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.25rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  background: rgba(7, 5, 15, 0.6);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

header.scrolled {
  padding: 0.8rem 5%;
  background: rgba(7, 5, 15, 0.85);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-title);
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  text-decoration: none;
  background: linear-gradient(135deg, var(--color-gold), var(--color-orange), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-icon {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 0 5px var(--color-orange));
}

nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

nav a {
  color: var(--color-text-sub);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

nav a:hover, nav a.active {
  color: #fff;
}

nav a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-orange), var(--color-purple));
  transition: var(--transition);
}

nav a:hover::after, nav a.active::after {
  width: 100%;
}

.btn-nav {
  padding: 0.5rem 1.25rem;
  background: linear-gradient(135deg, rgba(255, 94, 0, 0.2), rgba(130, 34, 255, 0.2));
  border: 1px solid rgba(255, 107, 0, 0.4);
  border-radius: 30px;
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.9rem;
  box-shadow: 0 0 15px rgba(255, 94, 0, 0.1);
  transition: var(--transition);
}

.btn-nav:hover {
  background: linear-gradient(135deg, var(--color-orange), var(--color-purple));
  box-shadow: 0 0 25px rgba(255, 94, 0, 0.4);
  transform: translateY(-2px);
  border-color: transparent;
}

/* 响应式导航开关 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.menu-toggle span {
  width: 25px;
  height: 2px;
  background-color: #fff;
  transition: var(--transition);
}

/* 主体容器 */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 0;
}

/* Hero 区域 */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 8rem;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
  width: 100%;
}

.hero-content h1 {
  font-family: var(--font-title);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
}

.hero-content h1 span.gradient-text {
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-orange) 50%, var(--color-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 10px rgba(255,94,0,0.15));
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--color-text-sub);
  margin-bottom: 2.5rem;
  max-width: 580px;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 2.2rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--color-orange), var(--color-purple));
  border: none;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 8px 30px rgba(255, 94, 0, 0.4);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-gold), var(--color-orange));
  opacity: 0;
  z-index: -1;
  transition: var(--transition);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(255, 183, 0, 0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 2.2rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  text-decoration: none;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-3px);
}

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 3.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

.stat-item h3 {
  font-family: var(--font-title);
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #fff, var(--color-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--color-text-sub);
  margin-top: 0.25rem;
}

/* 视觉太阳容器 (魔幻太阳特效) */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.sun-container {
  position: relative;
  width: 320px;
  height: 320px;
  display: flex;
  justify-content: center;
  align-items: center;
  filter: drop-shadow(0 0 60px rgba(255, 94, 0, 0.65));
}

.magic-sun {
  width: 100%;
  height: 100%;
  animation: sunRotate 35s linear infinite;
}

@keyframes sunRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.sun-core-glow {
  position: absolute;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, #ffffff 0%, var(--color-gold) 35%, var(--color-orange) 70%, transparent 100%);
  z-index: 2;
  filter: blur(8px);
  animation: sunPulse 6s ease-in-out infinite alternate;
}

@keyframes sunPulse {
  0% { transform: scale(0.95); opacity: 0.9; }
  100% { transform: scale(1.08); opacity: 1; }
}

.sun-magic-orbit {
  position: absolute;
  width: 280px;
  height: 280px;
  border: 1px dashed rgba(255, 183, 0, 0.3);
  border-radius: 50%;
  animation: orbitRotate 15s linear infinite;
}

.sun-magic-orbit::after {
  content: "";
  position: absolute;
  top: -6px;
  left: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-cyan);
  box-shadow: 0 0 15px var(--color-cyan);
}

@keyframes orbitRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(-360deg); }
}

/* 核心特性区 */
.section-title {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title h2 {
  font-family: var(--font-title);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.section-title h2 span {
  background: linear-gradient(90deg, var(--color-cyan), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-title p {
  color: var(--color-text-sub);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  backdrop-filter: blur(10px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-orange), var(--color-purple));
  opacity: 0;
  transition: var(--transition);
}

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

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 107, 0, 0.25);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.feature-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, rgba(255, 94, 0, 0.15), rgba(130, 34, 255, 0.15));
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255, 94, 0, 0.25);
  color: var(--color-orange);
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.feature-card p {
  color: var(--color-text-sub);
  font-size: 0.92rem;
}

/* 价格卡片区 */
.pricing-section {
  background: linear-gradient(180deg, transparent, rgba(18, 14, 34, 0.4), transparent);
}

/* 核心要求：价格排成一排，桌面上是横版，移动端垂直堆叠 */
.pricing-row {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: nowrap; /* 强行在桌面上保持一排 */
  margin-top: 3rem;
  width: 100%;
}

.price-card {
  flex: 1; /* 平分宽度 */
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 3rem 2rem;
  backdrop-filter: blur(10px);
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.price-card.popular {
  border-color: rgba(255, 94, 0, 0.45);
  background: linear-gradient(180deg, rgba(25, 20, 48, 0.6) 0%, rgba(18, 14, 34, 0.75) 100%);
  box-shadow: 0 10px 40px rgba(255, 94, 0, 0.08);
  transform: translateY(-8px);
}

.price-card.popular::after {
  content: "推荐方案";
  position: absolute;
  top: 15px;
  right: -30px;
  background: linear-gradient(90deg, var(--color-orange), var(--color-gold));
  color: #000;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 30px;
  transform: rotate(45deg);
}

.price-card:hover {
  transform: translateY(-12px);
  border-color: rgba(255, 107, 0, 0.35);
  box-shadow: 0 20px 45px rgba(255, 94, 0, 0.15);
}

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

.price-header p {
  color: var(--color-text-sub);
  font-size: 0.88rem;
}

.price-value {
  margin: 2rem 0;
  display: flex;
  align-items: baseline;
}

.price-value .currency {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-orange);
}

.price-value .amount {
  font-family: var(--font-title);
  font-size: 3.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

.price-value .period {
  color: var(--color-text-sub);
  font-size: 0.9rem;
  margin-left: 0.5rem;
}

.price-features {
  list-style: none;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}

.price-features li {
  font-size: 0.92rem;
  color: var(--color-text-main);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.price-features li svg {
  color: var(--color-cyan);
  flex-shrink: 0;
}

.price-features li.disabled {
  color: rgba(255, 255, 255, 0.35);
  text-decoration: line-through;
}

.price-features li.disabled svg {
  color: rgba(255, 255, 255, 0.25);
}

.btn-pricing {
  width: 100%;
  padding: 0.85rem;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  display: block;
  transition: var(--transition);
}

.price-card .btn-pricing {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: #fff;
}

.price-card:hover .btn-pricing {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255,255,255,0.3);
}

.price-card.popular .btn-pricing {
  background: linear-gradient(135deg, var(--color-orange), var(--color-purple));
  border: none;
  color: #fff;
  box-shadow: 0 4px 15px rgba(255, 94, 0, 0.2);
}

.price-card.popular:hover .btn-pricing {
  background: linear-gradient(135deg, var(--color-gold), var(--color-orange));
  box-shadow: 0 6px 20px rgba(255, 183, 0, 0.4);
}

/* 博客文章推荐区 */
.articles-section {
  position: relative;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.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);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(130, 34, 255, 0.3);
  box-shadow: 0 15px 35px rgba(130, 34, 255, 0.08);
}

.article-img-fallback {
  height: 180px;
  background: linear-gradient(135deg, rgba(18, 14, 34, 0.8), rgba(7, 5, 15, 0.9));
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.article-img-fallback svg {
  width: 50px;
  height: 50px;
  color: var(--color-orange);
  opacity: 0.7;
}

.article-tag {
  position: absolute;
  top: 15px;
  left: 15px;
  background: rgba(130, 34, 255, 0.2);
  border: 1px solid var(--color-purple);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 10px;
  border-radius: 20px;
}

.article-info {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--color-text-sub);
  margin-bottom: 0.75rem;
}

.article-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.article-info h3 a {
  color: #fff;
  text-decoration: none;
  transition: var(--transition);
}

.article-info h3 a:hover {
  color: var(--color-orange);
}

.article-info p {
  font-size: 0.88rem;
  color: var(--color-text-sub);
  margin-bottom: 1.5rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-link {
  margin-top: auto;
  color: var(--color-cyan);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.article-link:hover {
  color: #fff;
}

.article-link svg {
  transition: transform 0.2s;
}

.article-link:hover svg {
  transform: translateX(3px);
}

/* 用户评价区 */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-3px);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.avatar-placeholder {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-orange), var(--color-purple));
  color: #fff;
  font-weight: 700;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.2rem;
  border: 1px solid var(--border-color);
}

.user-meta h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

.user-meta p {
  font-size: 0.78rem;
  color: var(--color-text-sub);
}

.rating {
  color: var(--color-gold);
  font-size: 0.85rem;
  margin-bottom: 0.8rem;
}

.testimonial-text {
  font-size: 0.9rem;
  color: var(--color-text-main);
  line-height: 1.6;
}

/* 常见问题 FAQ (手风琴) */
.faq-list {
  max-width: 800px;
  margin: 3rem auto 0 auto;
}

.faq-item {
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  border-radius: 12px;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  outline: none;
  font-family: var(--font-body);
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.02);
}

.faq-icon {
  transition: transform 0.3s ease;
  color: var(--color-orange);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.5rem;
  color: var(--color-text-sub);
  font-size: 0.95rem;
  line-height: 1.6;
  border-top: 1px solid transparent;
}

.faq-item.active {
  border-color: rgba(255, 107, 0, 0.2);
}

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

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 1rem 1.5rem 1.5rem 1.5rem;
  border-top: 1px solid var(--border-color);
}

/* 网页背景画布 (尾翼动画专属) */
#cursor-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  pointer-events: none;
}

/* 页脚与友情链接区 (SEO 注入点) */
footer {
  background: #05030a;
  border-top: 1px solid var(--border-color);
  padding: 3.5rem 0 2rem 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-sub);
}

.footer-container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 1rem;
  text-decoration: none;
  background: linear-gradient(135deg, var(--color-gold), var(--color-orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-p {
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* 核心要求：页脚 PBN 精准输血通道，文字大小低调、色彩样式深度融合、无nofollow */
.friend-links-area {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.5rem;
  margin-top: 2rem;
  font-size: 0.8rem;
  color: rgba(164, 158, 189, 0.6); /* 低调偏灰文字 */
}

.friend-links-area span {
  margin-right: 0.8rem;
}

.friend-links-area a {
  color: rgba(164, 158, 189, 0.6);
  text-decoration: none;
  margin: 0 0.5rem;
  transition: color 0.2s;
  border-bottom: 1px dashed rgba(164, 158, 189, 0.3);
}

.friend-links-area a:hover {
  color: var(--color-orange);
  border-bottom-color: var(--color-orange);
}

.copyright {
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: rgba(164, 158, 189, 0.4);
}

/* 文章单独页面排版样式 (针对 articles/ 下的文章) */
.article-page {
  padding-top: 8rem;
}

.article-header {
  max-width: 800px;
  margin: 0 auto 3rem auto;
  text-align: center;
}

.article-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.article-body {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 3rem 2.5rem;
  backdrop-filter: blur(10px);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #e2dfeb;
}

.article-content p {
  margin-bottom: 1.5rem;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 2.5rem 0 1.2rem 0;
  color: #fff;
  border-left: 4px solid var(--color-orange);
  padding-left: 0.8rem;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 2rem 0 1rem 0;
  color: #fff;
}

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

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

/* 文章中关键字内链高亮 */
.article-content a.internal-link {
  color: var(--color-cyan);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid rgba(0, 240, 255, 0.3);
  transition: all 0.2s;
}

.article-content a.internal-link:hover {
  color: var(--color-orange);
  border-bottom-color: var(--color-orange);
  background: rgba(255, 94, 0, 0.05);
}

.article-footer-links {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.article-footer-links h4 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: #fff;
}

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

.article-footer-grid a {
  color: var(--color-text-sub);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-footer-grid a:hover {
  color: var(--color-orange);
}

.back-to-home {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-sub);
  text-decoration: none;
  font-size: 0.95rem;
  margin-bottom: 2rem;
  transition: var(--transition);
}

.back-to-home:hover {
  color: #fff;
  transform: translateX(-3px);
}

/* 响应式媒体查询 */

/* 平板与横屏手机 */
@media (max-width: 1024px) {
  /* 针对平板等宽屏幕，若卡片较宽展示，允许 wrap，但依然为横向排布趋势 */
  .pricing-row {
    flex-wrap: wrap; /* 允许折叠，但以 2 + 1 形式展示 */
    justify-content: center;
  }
  .price-card {
    flex: 0 1 calc(50% - 1rem); /* 半宽 */
    min-width: 290px;
  }
  .price-card.popular {
    transform: translateY(0);
  }
  .price-card.popular:hover {
    transform: translateY(-5px);
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  nav {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(7, 5, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 3rem 0;
    gap: 2rem;
    transition: left 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    border-bottom: 1px solid var(--border-color);
  }
  
  nav.active {
    left: 0;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }
  
  .hero-content h1 {
    font-size: 2.8rem;
  }
  
  .hero-content p {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
    gap: 2rem;
  }
  
  .hero-visual {
    order: -1; /* 太阳在手机端移到最上方 */
  }
  
  .sun-container {
    width: 240px;
    height: 240px;
  }
  
  .sun-core-glow {
    width: 120px;
    height: 120px;
  }
  
  .sun-magic-orbit {
    width: 210px;
    height: 210px;
  }
  
  /* 核心要求：移动端价格卡片为垂直堆叠 */
  .pricing-row {
    flex-direction: column;
    align-items: center;
  }
  
  .price-card {
    width: 100%;
    max-width: 400px;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 2.2rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    padding: 0 1rem;
  }
  
  .btn-primary, .btn-secondary {
    width: 100%;
  }
  
  .hero-stats {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
  }
  
  .article-body {
    padding: 1.5rem;
  }
  
  .article-header h1 {
    font-size: 1.8rem;
  }
}

/* ==========================================================================
   新增定制模块样式 (基于用户反馈迭代)
   ========================================================================== */

/* 1. Hero区左侧 VPN 特性徽章 */
.hero-vpn-badges {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: -1.5rem;
  margin-bottom: 2rem;
}

.vpn-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  backdrop-filter: blur(5px);
  transition: var(--transition);
}

.vpn-badge:hover {
  background: rgba(255, 94, 0, 0.1);
  border-color: rgba(255, 94, 0, 0.3);
  transform: translateY(-2px);
}

.badge-icon {
  width: 14px;
  height: 14px;
  color: var(--color-cyan);
}

/* 2. Hero区右侧 围绕魔幻太阳旋转的 VPN 节点样式 */
.orbit-node {
  position: absolute;
  width: 56px;
  height: 56px;
  background: rgba(14, 10, 31, 0.95);
  border: 1px solid rgba(255, 94, 0, 0.35);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px rgba(255, 94, 0, 0.25);
  z-index: 10;
  transition: border-color 0.3s;
}

.orbit-node span {
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--color-text-sub);
  margin-top: 1px;
}

.node-svg {
  width: 16px;
  height: 16px;
  color: var(--color-cyan);
}

/* 定位至环绕圆周 (配合 orbitRotate 动画自动随轨道逆向旋转) */
.node-hk {
  top: -28px;
  left: calc(50% - 28px);
}

.node-sg {
  bottom: 12px;
  left: -12px;
}

.node-us {
  bottom: 12px;
  right: -12px;
}

.orbit-node:hover {
  border-color: var(--color-cyan);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

/* 3. 特性区图 3：宇宙太阳云雨天专题展示 */
.cosmic-weather-showcase {
  width: 100%;
  margin-bottom: 4rem;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(255, 94, 0, 0.15);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
  background: rgba(18, 14, 34, 0.3);
}

.weather-image-wrap {
  position: relative;
  height: 380px;
  width: 100%;
  display: flex;
  align-items: center;
}

.weather-main-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
  filter: saturate(1.2) contrast(1.1) brightness(0.9);
}

.weather-glass-panel {
  position: absolute;
  left: 6%;
  width: 48%;
  max-width: 500px;
  background: rgba(18, 14, 34, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(15px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
  z-index: 5;
}

.weather-panel-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  color: var(--color-cyan);
  font-weight: 700;
  letter-spacing: 1.5px;
  margin-bottom: 0.8rem;
}

.weather-status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--color-cyan);
  animation: pulseGlow 1.8s infinite alternate;
}

.weather-glass-panel h4 {
  font-family: var(--font-title);
  font-size: 1.7rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.8rem;
}

.weather-glass-panel p {
  font-size: 0.92rem;
  color: var(--color-text-sub);
  line-height: 1.6;
}

@keyframes pulseGlow {
  0% { opacity: 0.3; }
  100% { opacity: 1; }
}

@media (max-width: 900px) {
  .weather-image-wrap {
    height: auto;
    flex-direction: column;
  }
  .weather-main-img {
    height: 240px;
  }
  .weather-glass-panel {
    position: relative;
    width: 90%;
    left: 0;
    margin: -40px auto 2rem auto;
  }
}

/* 4. 文章卡片真实图片裁剪适配 (图4) */
.article-img-container {
  width: 100%;
  height: 185px;
  overflow: hidden;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.article-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.article-card:hover .article-card-img {
  transform: scale(1.08);
}

/* 5. 用户评价区独立炫彩背景 (图5：不要黑白，采用星云渐变色) */
.testimonials-section-wrapper {
  width: 100%;
  background: linear-gradient(135deg, #0e0827 0%, #1e0b3c 35%, #350b4d 70%, #0d061e 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 6rem 0;
  position: relative;
  overflow: hidden;
}

.testimonials-section-wrapper::before {
  content: "";
  position: absolute;
  width: 450px;
  height: 450px;
  top: 10%;
  left: 15%;
  background: radial-gradient(circle, rgba(130, 34, 255, 0.22) 0%, transparent 70%);
  filter: blur(55px);
  pointer-events: none;
}

.testimonials-section-wrapper::after {
  content: "";
  position: absolute;
  width: 500px;
  height: 500px;
  bottom: 8%;
  right: 15%;
  background: radial-gradient(circle, rgba(255, 94, 0, 0.16) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}