/* ===== veee加速器 · 全局变量 ===== */
:root {
  --vv-indigo: #161B33;
  --vv-indigo-deep: #0B0E22;
  --vv-blue: #4C6FEF;
  --vv-violet: #7C6FFF;
  --vv-cyan: #28E1C9;
  --vv-bg: #F4F6FC;
  --vv-surface: #FFFFFF;
  --vv-text: #161A2E;
  --vv-text-muted: #5B6178;
  --vv-text-on-dark: #E7EBFF;
  --vv-text-on-dark-muted: #A6ADD1;
  --vv-border: rgba(22, 27, 51, 0.08);
  --vv-shadow-soft: 0 10px 28px rgba(22, 27, 51, 0.08);
  --vv-shadow-strong: 0 20px 44px rgba(22, 27, 51, 0.16);
  --vv-radius-lg: 22px;
  --vv-radius-md: 16px;
  --vv-radius-sm: 10px;
  --vv-container: 1160px;
  --vv-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --vv-grad-brand: linear-gradient(135deg, var(--vv-blue), var(--vv-cyan));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--vv-font);
  color: var(--vv-text);
  background: var(--vv-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, p, ul { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
svg { display: block; }
img { max-width: 100%; }

.vv-container {
  width: 100%;
  max-width: var(--vv-container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 按钮 ===== */
.vv-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  white-space: nowrap;
}
.vv-btn:hover { transform: translateY(-2px); }
.vv-btn--primary {
  background: var(--vv-grad-brand);
  color: #0B0E22;
  box-shadow: 0 12px 26px rgba(76, 111, 239, 0.32);
}
.vv-btn--ghost {
  background: transparent;
  color: var(--vv-text);
  border-color: var(--vv-border);
}
.vv-btn--dark { background: var(--vv-indigo); color: #fff; }
.vv-btn--light { background: #fff; color: var(--vv-indigo-deep); }
.vv-btn--outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.4); }
.vv-btn--block { width: 100%; }
.vv-btn--sm { padding: 9px 18px; font-size: 13px; }

/* ===== 顶部导航 ===== */
.vv-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(244, 246, 252, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}
.vv-header.is-scrolled {
  background: rgba(244, 246, 252, 0.92);
  box-shadow: var(--vv-shadow-soft);
}
.vv-header__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.vv-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.2px;
}
.vv-brand em { font-style: normal; color: var(--vv-blue); }
.vv-brand__mark { width: 26px; height: 26px; }
.vv-nav { display: flex; gap: 30px; }
.vv-nav a {
  font-size: 14.5px;
  color: var(--vv-text-muted);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.vv-nav a:hover, .vv-nav a.is-active { color: var(--vv-text); border-color: var(--vv-cyan); }
.vv-header__actions { display: flex; align-items: center; gap: 10px; }
.vv-nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px; height: 32px;
  border: none; background: none; cursor: pointer;
  padding: 6px;
}
.vv-nav-toggle span { display: block; height: 2px; background: var(--vv-text); border-radius: 2px; transition: transform 0.2s ease, opacity 0.2s ease; }
.vv-nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.vv-nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.vv-nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.vv-hero {
  padding: 168px 0 90px;
  background:
    radial-gradient(680px 420px at 82% 8%, rgba(76, 111, 239, 0.16), transparent 65%),
    radial-gradient(520px 360px at 4% 90%, rgba(40, 225, 201, 0.14), transparent 60%);
}
.vv-hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 56px;
}
.vv-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--vv-blue);
  background: rgba(76, 111, 239, 0.1);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.vv-hero__copy h1 {
  font-size: 44px;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.vv-accent {
  background: var(--vv-grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.vv-hero__sub {
  margin-top: 20px;
  font-size: 16px;
  color: var(--vv-text-muted);
  max-width: 480px;
}
.vv-hero__cta { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.vv-trust-list { display: flex; gap: 22px; margin-top: 30px; flex-wrap: wrap; }
.vv-trust-list li { display: flex; align-items: center; gap: 6px; font-size: 13.5px; color: var(--vv-text-muted); }
.vv-trust-list svg { width: 16px; height: 16px; color: var(--vv-cyan); }

.vv-hero__visual { position: relative; display: flex; justify-content: center; }
.vv-orbit { width: 100%; max-width: 420px; }
.vv-orbit__node circle {
  filter: drop-shadow(0 0 6px rgba(40, 225, 201, 0.9));
  animation: vv-pulse 2.6s ease-in-out infinite;
}
.vv-orbit__node circle:nth-child(2) { animation-delay: 0.5s; }
.vv-orbit__node circle:nth-child(3) { animation-delay: 1s; }
.vv-orbit__node circle:nth-child(4) { animation-delay: 1.5s; }
@keyframes vv-pulse {
  0%, 100% { opacity: 0.55; r: 6; }
  50% { opacity: 1; r: 8; }
}
.vv-float-card {
  position: absolute;
  bottom: 6%;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--vv-surface);
  padding: 14px 20px;
  border-radius: var(--vv-radius-md);
  box-shadow: var(--vv-shadow-strong);
}
.vv-float-card__dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--vv-cyan);
  box-shadow: 0 0 0 6px rgba(40, 225, 201, 0.18);
}
.vv-float-card__value { font-size: 18px; font-weight: 700; }
.vv-float-card__label { font-size: 12px; color: var(--vv-text-muted); }

/* ===== 通用分区标题 ===== */
.vv-section-head { text-align: center; max-width: 620px; margin: 0 auto 46px; }
.vv-section-head--compact { margin-bottom: 24px; }
.vv-section-head h2 { font-size: 32px; font-weight: 800; margin-top: 6px; letter-spacing: -0.3px; }
.vv-section-head p { margin-top: 12px; color: var(--vv-text-muted); font-size: 15px; }
.vv-example-note { font-size: 12.5px !important; color: #9BA1BE !important; }

/* ===== 线路总览面板 ===== */
.vv-panel { padding: 90px 0 40px; }
.vv-panel__summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: var(--vv-surface);
  border-radius: var(--vv-radius-lg);
  box-shadow: var(--vv-shadow-soft);
  padding: 32px 20px;
  margin-bottom: 36px;
}
.vv-summary-item { text-align: center; }
.vv-summary-item__num { font-size: 28px; font-weight: 800; color: var(--vv-indigo); }
.vv-summary-item__desc { font-size: 13px; color: var(--vv-text-muted); margin-top: 4px; }

.vv-region-list {
  background: var(--vv-surface);
  border-radius: var(--vv-radius-lg);
  box-shadow: var(--vv-shadow-soft);
  padding: 12px 28px;
}
.vv-region-row {
  display: grid;
  grid-template-columns: 180px 1fr 60px;
  align-items: center;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--vv-border);
}
.vv-region-row:last-child { border-bottom: none; }
.vv-region-row__name { display: flex; align-items: center; gap: 8px; font-size: 14.5px; font-weight: 600; }
.vv-region-row__name svg { width: 18px; height: 18px; color: var(--vv-blue); }
.vv-region-row__bar {
  height: 8px;
  border-radius: 999px;
  background: rgba(22, 27, 51, 0.06);
  overflow: hidden;
}
.vv-region-row__bar span {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: var(--vv-grad-brand);
  transition: width 1.1s ease;
}
.vv-region-row__bar.in-view span { width: var(--vv-bar); }
.vv-region-row__ms { font-size: 13.5px; color: var(--vv-text-muted); text-align: right; font-variant-numeric: tabular-nums; }

/* ===== 核心优势 ===== */
.vv-advantages { padding: 90px 0; }
.vv-adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.vv-adv-card {
  background: var(--vv-surface);
  border-radius: var(--vv-radius-md);
  padding: 28px 24px;
  box-shadow: var(--vv-shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.vv-adv-card:hover { transform: translateY(-4px); box-shadow: var(--vv-shadow-strong); }
.vv-adv-card__icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(76, 111, 239, 0.1);
  color: var(--vv-blue);
  margin-bottom: 16px;
}
.vv-adv-card__icon svg { width: 24px; height: 24px; }
.vv-adv-card h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 8px; }
.vv-adv-card p { font-size: 13.5px; color: var(--vv-text-muted); }

/* ===== 适用场景 ===== */
.vv-scenarios { padding: 20px 0 70px; }
.vv-chip-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.vv-chip {
  font-size: 13.5px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--vv-surface);
  border: 1px solid var(--vv-border);
  color: var(--vv-text-muted);
}

/* ===== 支持终端 ===== */
.vv-platforms { padding: 20px 0 90px; }
.vv-platform-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.vv-platform-card {
  background: var(--vv-surface);
  border-radius: var(--vv-radius-md);
  padding: 26px 14px;
  text-align: center;
  box-shadow: var(--vv-shadow-soft);
}
.vv-platform-card svg { width: 30px; height: 30px; margin: 0 auto 12px; color: var(--vv-indigo); }
.vv-platform-card__name { font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.vv-dl-link { font-size: 12.5px; color: var(--vv-blue); font-weight: 600; }

/* ===== 上手流程 ===== */
.vv-steps { padding: 20px 0 90px; }
.vv-steps__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.vv-step {
  background: var(--vv-surface);
  border-radius: var(--vv-radius-md);
  padding: 26px 22px;
  box-shadow: var(--vv-shadow-soft);
}
.vv-step__num {
  font-size: 26px;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--vv-blue);
  margin-bottom: 10px;
}
.vv-step h3 { font-size: 15.5px; font-weight: 700; margin-bottom: 6px; }
.vv-step p { font-size: 13px; color: var(--vv-text-muted); }

/* ===== 波浪分隔 ===== */
.vv-wave { line-height: 0; margin-top: -1px; }
.vv-wave svg { width: 100%; height: 60px; display: block; fill: var(--vv-indigo-deep); }
.vv-wave--flip { margin-bottom: -1px; margin-top: 0; }

/* ===== 套餐价格（深色区块） ===== */
.vv-pricing {
  background: var(--vv-indigo-deep);
  color: var(--vv-text-on-dark);
  padding: 60px 0 90px;
}
.vv-pricing .vv-section-head h2 { color: #fff; }
.vv-pricing .vv-section-head p { color: var(--vv-text-on-dark-muted); }
.vv-billing-tabs {
  display: flex;
  justify-content: center;
  gap: 6px;
  background: rgba(255,255,255,0.06);
  width: fit-content;
  margin: 0 auto 44px;
  padding: 6px;
  border-radius: 999px;
}
.vv-billing-tabs button {
  border: none;
  background: transparent;
  color: var(--vv-text-on-dark-muted);
  font-size: 13.5px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 999px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.2s ease, color 0.2s ease;
}
.vv-billing-tabs button.is-active { background: var(--vv-grad-brand); color: #0B0E22; }
.vv-save-tag {
  font-size: 10.5px;
  font-weight: 700;
  background: rgba(40, 225, 201, 0.2);
  color: var(--vv-cyan);
  padding: 2px 7px;
  border-radius: 999px;
}
.vv-billing-tabs button.is-active .vv-save-tag { background: rgba(11,14,34,0.15); color: #0B0E22; }

.vv-pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.vv-price-card {
  position: relative;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--vv-radius-lg);
  padding: 32px 26px;
}
.vv-price-card--featured {
  background: linear-gradient(180deg, rgba(76,111,239,0.16), rgba(40,225,201,0.08));
  border-color: rgba(76,111,239,0.4);
  transform: scale(1.03);
}
.vv-price-card__tag {
  position: absolute;
  top: -13px; left: 26px;
  background: var(--vv-grad-brand);
  color: #0B0E22;
  font-size: 11.5px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
}
.vv-price-card__name { font-size: 15px; font-weight: 700; color: var(--vv-text-on-dark-muted); margin-bottom: 14px; }
.vv-price-card__price { display: none; font-size: 34px; font-weight: 800; color: #fff; }
.vv-price-card__price.is-active { display: block; }
.vv-price-card__price span { font-size: 14px; font-weight: 500; color: var(--vv-text-on-dark-muted); }
.vv-price-card__note { font-size: 12px; color: var(--vv-cyan); margin: 8px 0 22px; }
.vv-price-card ul { display: flex; flex-direction: column; gap: 12px; margin-bottom: 26px; }
.vv-price-card li { display: flex; align-items: center; gap: 9px; font-size: 13.5px; color: var(--vv-text-on-dark-muted); }
.vv-price-card li svg { width: 16px; height: 16px; color: var(--vv-cyan); flex-shrink: 0; }

/* ===== 用户评价 ===== */
.vv-testimonials { padding: 90px 0; }
.vv-testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.vv-testi-card {
  background: var(--vv-surface);
  border-radius: var(--vv-radius-md);
  padding: 26px 24px;
  box-shadow: var(--vv-shadow-soft);
}
.vv-testi-card__stars { display: flex; gap: 3px; margin-bottom: 14px; }
.vv-testi-card__stars svg { width: 15px; height: 15px; color: #F5B301; }
.vv-testi-card__quote { font-size: 14px; color: var(--vv-text); line-height: 1.7; }
.vv-testi-card__person { display: flex; align-items: center; gap: 10px; margin-top: 20px; }
.vv-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--vv-grad-brand);
  color: #0B0E22;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
}
.vv-testi-card__name { display: block; font-size: 13.5px; font-weight: 700; }
.vv-testi-card__role { display: block; font-size: 12px; color: var(--vv-text-muted); }

/* ===== FAQ ===== */
.vv-faq { padding: 0 0 90px; }
.vv-faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.vv-faq-item {
  background: var(--vv-surface);
  border-radius: var(--vv-radius-md);
  padding: 4px 24px;
  box-shadow: var(--vv-shadow-soft);
}
.vv-faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.vv-faq-item summary::-webkit-details-marker { display: none; }
.vv-faq-item__chevron { width: 18px; height: 18px; color: var(--vv-text-muted); transition: transform 0.25s ease; flex-shrink: 0; }
.vv-faq-item[open] .vv-faq-item__chevron { transform: rotate(180deg); }
.vv-faq-item__answer { font-size: 13.5px; color: var(--vv-text-muted); padding: 0 0 22px; line-height: 1.75; }

/* ===== 底部行动号召 ===== */
.vv-cta-banner {
  background: linear-gradient(120deg, var(--vv-blue), var(--vv-violet) 55%, var(--vv-cyan));
  border-radius: 28px;
  padding: 56px 40px;
  text-align: center;
  color: #fff;
  margin-bottom: 90px;
}
.vv-cta-banner h2 { font-size: 28px; font-weight: 800; }
.vv-cta-banner p { margin-top: 12px; font-size: 15px; opacity: 0.9; }
.vv-cta-banner .vv-hero__cta { justify-content: center; margin-top: 26px; }

/* ===== 页脚 ===== */
.vv-footer { background: var(--vv-indigo-deep); color: var(--vv-text-on-dark-muted); padding: 60px 0 30px; }
.vv-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.vv-footer__brand .vv-brand { color: #fff; }
.vv-footer__brand p { margin-top: 14px; font-size: 13px; max-width: 280px; }
.vv-footer__col h4 { color: #fff; font-size: 14px; margin-bottom: 16px; }
.vv-footer__col ul { display: flex; flex-direction: column; gap: 10px; }
.vv-footer__col a { font-size: 13px; }
.vv-footer__col a:hover { color: #fff; }
.vv-footer__legal { padding-top: 22px; font-size: 12px; line-height: 1.9; }

/* ===== 滚动揭示动画 ===== */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .vv-region-row__bar span { transition: none; }
  .vv-orbit__node circle { animation: none; }
}

/* ===== 响应式 ===== */
@media (max-width: 980px) {
  .vv-adv-grid { grid-template-columns: repeat(2, 1fr); }
  .vv-platform-grid { grid-template-columns: repeat(3, 1fr); }
  .vv-steps__row { grid-template-columns: repeat(2, 1fr); }
  .vv-pricing-grid, .vv-testi-grid { grid-template-columns: 1fr; }
  .vv-price-card--featured { transform: none; }
  .vv-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .vv-hero__grid { grid-template-columns: 1fr; text-align: center; }
  .vv-hero__copy { order: 1; }
  .vv-hero__copy .vv-hero__sub { margin-left: auto; margin-right: auto; }
  .vv-hero__cta, .vv-trust-list { justify-content: center; }
  .vv-hero__visual { order: 2; margin-top: 40px; }
}
@media (max-width: 860px) {
  .vv-nav { display: none; }
  .vv-nav-toggle { display: flex; }
}
@media (max-width: 760px) {
  .vv-hero { padding-top: 140px; }
  .vv-hero__copy h1 { font-size: 32px; }
  .vv-panel__summary { grid-template-columns: repeat(2, 1fr); }
  .vv-region-row { grid-template-columns: 1fr; gap: 8px; text-align: left; }
  .vv-region-row__ms { text-align: left; }
}
@media (max-width: 560px) {
  .vv-adv-grid, .vv-platform-grid, .vv-steps__row { grid-template-columns: 1fr 1fr; }
  .vv-footer__grid { grid-template-columns: 1fr; }
}