/* =============================================
   全局变量 & 重置
   ============================================= */
:root {
  --bg:          #0b0c13;
  --card-bg:     rgba(255,255,255,0.03);
  --border:      rgba(255,255,255,0.08);
  --text:        #f3f4f6;
  --muted:       #9ca3af;
  --cyan:        #00f2fe;
  --purple:      #7f00ff;
  --glow-purple: rgba(127,0,255,0.35);
  --glow-cyan:   rgba(0,242,254,0.35);
  --grad:        linear-gradient(135deg, var(--purple), var(--cyan));
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.6;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* =============================================
   弥散背景光晕
   ============================================= */
.glow-blob {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(150px);
  z-index: -1;
  pointer-events: none;
  opacity: .7;
}
.glow-blob--1 { background: var(--glow-purple); top: -200px;  left:  -100px; }
.glow-blob--2 { background: var(--glow-cyan);   top:  600px;  right: -200px; }
.glow-blob--3 { background: var(--glow-purple); bottom: 400px; left: -200px; }

/* =============================================
   导航栏
   ============================================= */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11,12,19,.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.2rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.nav__logo svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

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

.nav__list a {
  color: var(--text);
  font-size: .95rem;
  transition: color .3s;
}
.nav__list a:hover { color: var(--cyan); }

.nav__cta {
  background: var(--grad) !important;
  padding: .6rem 1.5rem !important;
  border-radius: 50px;
  font-weight: 600;
  color: #fff !important;
  -webkit-text-fill-color: #fff !important;
  transition: transform .2s, box-shadow .2s;
}
.nav__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,242,254,.4);
}

/* 移动端汉堡菜单 */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: .3s;
}

/* =============================================
   Hero 区域
   ============================================= */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: calc(100vh - 80px);
  gap: 4rem;
}

.hero__content { flex: 1; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(0,242,254,.1);
  color: var(--cyan);
  padding: .4rem 1rem;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(0,242,254,.2);
}

.hero__title {
  font-size: 3.5rem;
  line-height: 1.2;
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.hero__title span {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__desc {
  font-size: 1.1rem;
  color: var(--muted);
  margin-bottom: 2.5rem;
  max-width: 540px;
}

/* 平台下载按钮网格 */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 1rem;
}

.dl-btn {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 1rem;
  border-radius: 12px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: border-color .3s, background .3s, transform .3s;
  cursor: pointer;
}
.dl-btn:hover {
  border-color: var(--cyan);
  background: rgba(0,242,254,.05);
  transform: translateY(-3px);
}
.dl-btn__icon {
  font-size: 1.8rem;
  color: var(--cyan);
  width: 36px;
  text-align: center;
  flex-shrink: 0;
}
.dl-btn__label {
  font-size: .75rem;
  color: var(--muted);
  display: block;
}
.dl-btn__name {
  font-size: 1rem;
  font-weight: 600;
  display: block;
}

/* Hero 装饰插画 */
.hero__visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.orbit-wrap {
  width: 380px;
  height: 380px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle, rgba(127,0,255,.1) 0%, transparent 70%);
}

.orbit {
  position: absolute;
  border: 1px dashed rgba(255,255,255,.15);
  border-radius: 50%;
  animation: spin 20s linear infinite;
}
.orbit--sm { width: 220px; height: 220px; animation-direction: reverse; }
.orbit--lg { width: 320px; height: 320px; }

.orbit-dot {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 15px var(--cyan);
}
.orbit-dot--1 { top: 10%; left: 50%; }
.orbit-dot--2 { bottom: 20%; left: 10%; }
.orbit-dot--3 { bottom: 20%; right: 10%; }

.shield {
  width: 140px;
  height: 160px;
  background: linear-gradient(135deg, var(--purple), rgba(11,12,19,.9));
  border: 2px solid var(--cyan);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 0 40px rgba(0,242,254,.3);
  z-index: 2;
}
.shield svg {
  width: 48px;
  height: 48px;
  color: var(--cyan);
  filter: drop-shadow(0 0 8px var(--cyan));
}

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

/* =============================================
   数据统计
   ============================================= */
.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 2rem;
}
.stat { text-align: center; }
.stat__num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--cyan);
  margin-bottom: .5rem;
}
.stat__label { color: var(--muted); font-size: .95rem; }

/* =============================================
   通用区块标题
   ============================================= */
.section-head {
  text-align: center;
  margin-bottom: 4rem;
}
.section-head h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
}
.section-head h2 span {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-head p {
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
}

/* =============================================
   核心优势
   ============================================= */
.features {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 2rem;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 2rem;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 2.5rem 2rem;
  border-radius: 20px;
  backdrop-filter: blur(10px);
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--purple);
  box-shadow: 0 10px 30px rgba(127,0,255,.15);
}
.feature-card__icon {
  width: 60px;
  height: 60px;
  background: rgba(127,0,255,.1);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 1.5rem;
  font-size: 1.8rem;
  color: var(--purple);
}
.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}
.feature-card p {
  color: var(--muted);
  font-size: .95rem;
}

/* =============================================
   全球节点
   ============================================= */
.nodes {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 2rem;
}
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 1.5rem;
}
.node-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 1.5rem;
  border-radius: 16px;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: border-color .3s, transform .3s;
}
.node-card:hover {
  border-color: var(--cyan);
  transform: translateY(-3px);
}
.node-card__flag {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #23242e;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.node-card h4 { font-size: 1rem; font-weight: 600; }
.node-card span { font-size: .8rem; color: var(--cyan); }

/* =============================================
   定价套餐
   ============================================= */
.pricing {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 2rem;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 2rem;
  align-items: stretch;
}
.price-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 3rem 2rem;
  text-align: center;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
  transition: transform .3s, box-shadow .3s;
}
.price-card:hover { transform: translateY(-4px); }

.price-card--popular {
  border-color: var(--cyan);
  background: linear-gradient(145deg, rgba(0,242,254,.05), rgba(127,0,255,.05));
  box-shadow: 0 0 40px rgba(0,242,254,.1);
}
.price-card--popular:hover {
  box-shadow: 0 8px 50px rgba(0,242,254,.2);
}

.popular-tag {
  display: inline-block;
  background: var(--grad);
  color: #fff;
  font-size: .78rem;
  font-weight: 700;
  padding: .3rem .9rem;
  border-radius: 50px;
  margin-bottom: 1rem;
}

.price-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.price-value {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--cyan);
}
.price-value small {
  font-size: 1rem;
  font-weight: 400;
  color: var(--muted);
}

.price-feats {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: .75rem;
}
.price-feats li {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  font-size: .93rem;
  color: var(--muted);
}
.price-feats li .check-icon {
  color: var(--cyan);
  font-size: 1rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.buy-btn {
  display: block;
  padding: .9rem 1.5rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: .95rem;
  transition: transform .2s, box-shadow .2s;
  cursor: pointer;
}
.buy-btn--default {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.buy-btn--default:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}
.buy-btn--primary {
  background: var(--grad);
  color: #fff;
  border: none;
}
.buy-btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,242,254,.4);
}

/* =============================================
   媒体背书
   ============================================= */
.media {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 4rem 2rem;
}
.media__inner {
  max-width: 1200px;
  margin: 0 auto;
}
.media__logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}
.media__item {
  display: flex;
  align-items: center;
  gap: .6rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 1.1rem;
  transition: color .3s;
}
.media__item:hover { color: var(--text); }
.media__item svg { width: 20px; height: 20px; }

/* =============================================
   用户评价
   ============================================= */
.reviews {
  max-width: 1200px;
  margin: 6rem auto;
  padding: 0 2rem;
}
.review-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 2rem;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.review-user {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--grad);
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.review-user__name { font-weight: 600; font-size: .95rem; }
.review-user__role { font-size: .8rem; color: var(--muted); }
.stars { color: #f59e0b; font-size: .9rem; letter-spacing: 2px; }
.review-card p { color: var(--muted); font-size: .9rem; line-height: 1.7; }

/* =============================================
   常见问题 FAQ
   ============================================= */
.faq {
  max-width: 860px;
  margin: 6rem auto;
  padding: 0 2rem;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 1rem;
  overflow: hidden;
}
.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 1.4rem 1.8rem;
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: background .2s;
}
.faq-q:hover { background: rgba(255,255,255,.03); }
.faq-q svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--muted);
  transition: transform .3s;
}
.faq-item.open .faq-q svg { transform: rotate(180deg); }
.faq-a {
  display: none;
  padding: 0 1.8rem 1.4rem;
  color: var(--muted);
  font-size: .93rem;
  line-height: 1.8;
}
.faq-item.open .faq-a { display: block; }

/* =============================================
   SEO 文章区
   ============================================= */
.seo-article {
  border-top: 1px solid var(--border);
  padding: 5rem 2rem;
}
.seo-article__inner {
  max-width: 900px;
  margin: 0 auto;
}
.seo-article h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text);
}
.seo-article p {
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.9;
  margin-bottom: 1.2rem;
}

/* =============================================
   页脚
   ============================================= */
.footer {
  border-top: 1px solid var(--border);
  padding: 4rem 2rem 2rem;
}
.footer__grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
}
.footer__logo {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1rem;
}
.footer__logo svg { width: 24px; height: 24px; }
.footer__desc { color: var(--muted); font-size: .9rem; line-height: 1.7; }
.footer__col h5 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.footer__col ul { display: flex; flex-direction: column; gap: .6rem; }
.footer__col ul a { color: var(--muted); font-size: .9rem; transition: color .3s; }
.footer__col ul a:hover { color: var(--cyan); }
.footer__contact p {
  color: var(--muted);
  font-size: .88rem;
  margin-bottom: .5rem;
  display: flex;
  align-items: flex-start;
  gap: .5rem;
}
.footer__contact svg { width: 14px; height: 14px; flex-shrink: 0; margin-top: 3px; }

.footer__bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: .82rem;
  color: var(--muted);
}
.footer__bottom a { color: var(--muted); transition: color .3s; }
.footer__bottom a:hover { color: var(--cyan); }

/* =============================================
   响应式
   ============================================= */
@media (max-width: 1024px) {
  .nodes-grid { grid-template-columns: repeat(2,1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav__list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(11,12,19,.97);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
  }
  .nav__list.open { display: flex; }
  .nav__list li { width: 100%; }
  .nav__list a { display: block; padding: .8rem 2rem; }
  .nav__cta { margin: .5rem 2rem; text-align: center; border-radius: 50px; }
  .nav__toggle { display: flex; }

  .header { position: relative; }

  .hero {
    flex-direction: column;
    padding: 3rem 1.5rem;
    min-height: auto;
    text-align: center;
  }
  .hero__title { font-size: 2.4rem; }
  .hero__desc { margin: 0 auto 2rem; }
  .hero__visual { display: none; }
  .platform-grid { grid-template-columns: 1fr; }

  .stats__inner { grid-template-columns: repeat(2,1fr); }

  .feature-grid  { grid-template-columns: 1fr; }
  .nodes-grid    { grid-template-columns: 1fr 1fr; }
  .pricing-grid  { grid-template-columns: 1fr; }
  .review-grid   { grid-template-columns: 1fr; }

  .section-head h2 { font-size: 1.8rem; }

  .footer__grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer__bottom { flex-direction: column; text-align: center; }

  .media__logos { gap: 1.8rem; }
}

@media (max-width: 480px) {
  .hero__title { font-size: 2rem; }
  .stats__inner { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .nodes-grid { grid-template-columns: 1fr; }
}