/**
 * 赔钱机场 (peiqianjc.buzz) - 官方品牌主样式表
 * 框架：操作演示 五步教程连续过渡 | 模板：银灰科技
 */

@import url("./silver-tech.css");
@import url("./five-step-demo.css");

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  scroll-behavior: smooth;
  background-color: var(--tech-bg-deep);
  color: var(--tech-silver-200);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  background-color: var(--tech-bg-deep);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--tech-transition);
}

img, svg {
  display: block;
}

/* 统一版心容器 */
.tech-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* 银灰科技动态背景 Canvas */
#silver-particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ================= 顶部固定导航栏 ================= */
.tech-navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 74px;
  z-index: 100;
  background: rgba(8, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
  transition: var(--tech-transition);
}

.tech-navbar.scrolled {
  background: rgba(8, 10, 15, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  border-bottom-color: rgba(56, 189, 248, 0.25);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo svg {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 0 10px rgba(226, 232, 240, 0.3));
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-text .title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
}

.brand-text .subtitle {
  font-size: 0.72rem;
  font-family: ui-monospace, SFMono-Regular, monospace;
  color: var(--tech-silver-400);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--tech-silver-300);
  position: relative;
  padding: 6px 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #fff, var(--tech-cyan-glow));
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: #fff;
}

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

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  padding: 8px;
}

/* ================= HERO 英雄区 ================= */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 130px 0 80px;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero-tag {
  margin-bottom: 24px;
}

.hero-h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.18;
  color: #ffffff;
  margin-bottom: 22px;
}

.hero-h1 span.highlight {
  background: var(--tech-grad-silver);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--tech-silver-300);
  line-height: 1.7;
  max-width: 820px;
  margin: 0 auto 36px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-telemetry-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  padding: 16px 28px;
  border-radius: 14px;
  background: rgba(18, 24, 36, 0.65);
  border: 1px solid rgba(148, 163, 184, 0.15);
  backdrop-filter: blur(12px);
  max-width: 780px;
  margin: 0 auto;
}

.telemetry-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--tech-silver-300);
}

.telemetry-item strong {
  color: #fff;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

/* ================= 核心指标看板 (METRICS) ================= */
.metrics-section {
  position: relative;
  padding: 30px 0 70px;
  z-index: 2;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.metric-card {
  background: var(--tech-bg-surface);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  transition: var(--tech-transition);
}

.metric-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.metric-num {
  font-size: 2.25rem;
  font-weight: 800;
  font-family: ui-monospace, SFMono-Regular, monospace;
  background: var(--tech-grad-silver);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}

.metric-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.metric-sub {
  font-size: 0.75rem;
  color: var(--tech-silver-400);
}

/* ================= 官方套餐价格表 (PRICING) ================= */
.pricing-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(180deg, var(--tech-bg-deep) 0%, #0e121a 50%, var(--tech-bg-deep) 100%);
  z-index: 2;
}

.pricing-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
}

.pricing-header h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.pricing-header p {
  color: var(--tech-silver-400);
  font-size: 1.05rem;
}

/* 周期切换药丸 */
.billing-switcher {
  display: inline-flex;
  align-items: center;
  background: rgba(18, 24, 36, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 9999px;
  padding: 4px;
  margin-top: 24px;
}

.billing-btn {
  padding: 8px 20px;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--tech-silver-300);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: var(--tech-transition);
}

.billing-btn.active {
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  color: #0b0f17;
  box-shadow: 0 2px 10px rgba(255, 255, 255, 0.2);
}

.billing-discount-tag {
  display: inline-block;
  font-size: 0.68rem;
  background: rgba(56, 189, 248, 0.15);
  color: var(--tech-cyan-glow);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 4px;
  font-weight: 700;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.plan-card {
  background: var(--tech-bg-surface);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 18px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--tech-transition);
  position: relative;
}

.plan-card.featured {
  background: linear-gradient(180deg, rgba(28, 38, 56, 0.9) 0%, rgba(18, 24, 36, 0.95) 100%);
  border-color: var(--tech-cyan-glow);
  box-shadow: 0 10px 40px rgba(56, 189, 248, 0.15);
  transform: translateY(-8px);
}

.plan-badge-top {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #38bdf8, #0284c7);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 9999px;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.4);
  white-space: nowrap;
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.8125rem;
  color: var(--tech-silver-400);
  min-height: 38px;
  margin-bottom: 18px;
}

.plan-price-box {
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

.plan-price-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: #fff;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.plan-price-num span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--tech-silver-400);
}

.plan-features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-features-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--tech-silver-300);
}

.plan-features-list li svg {
  width: 16px;
  height: 16px;
  stroke: var(--tech-emerald);
  flex-shrink: 0;
}

.plan-cta-btn {
  width: 100%;
}

/* ================= 核心品牌技术优势 (FEATURES) ================= */
.features-section {
  position: relative;
  padding: 100px 0;
  z-index: 2;
}

.features-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}

.features-header h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-box {
  background: var(--tech-bg-surface);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 16px;
  padding: 32px;
  transition: var(--tech-transition);
}

.feature-box:hover {
  transform: translateY(-6px);
  border-color: rgba(226, 232, 240, 0.3);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon-wrap svg {
  width: 26px;
  height: 26px;
  stroke: var(--tech-silver-200);
}

.feature-box:hover .feature-icon-wrap svg {
  stroke: var(--tech-cyan-glow);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--tech-silver-400);
  line-height: 1.65;
}

/* ================= 流媒体与海外 AI 深度适配 ================= */
.unlock-section {
  position: relative;
  padding: 80px 0;
  background: linear-gradient(180deg, var(--tech-bg-deep) 0%, #10141d 50%, var(--tech-bg-deep) 100%);
  z-index: 2;
}

.unlock-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.unlock-card {
  background: rgba(18, 24, 36, 0.7);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 12px;
  padding: 20px 14px;
  text-align: center;
  transition: var(--tech-transition);
}

.unlock-card:hover {
  border-color: var(--tech-cyan-glow);
  transform: translateY(-4px);
  background: rgba(28, 38, 56, 0.8);
}

.unlock-logo-symbol {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.unlock-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.unlock-tag {
  font-size: 0.72rem;
  color: var(--tech-emerald);
  font-weight: 600;
}

/* ================= 客户端全平台生态 (CLIENTS) ================= */
.clients-section {
  position: relative;
  padding: 90px 0;
  z-index: 2;
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.client-item-card {
  background: var(--tech-bg-surface);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 14px;
  padding: 24px 18px;
  text-align: center;
  transition: var(--tech-transition);
}

.client-item-card:hover {
  border-color: rgba(226, 232, 240, 0.3);
  transform: translateY(-4px);
}

.client-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 14px;
  stroke: var(--tech-silver-200);
}

.client-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.client-tools {
  font-size: 0.75rem;
  color: var(--tech-silver-400);
  line-height: 1.4;
}

/* ================= 原创知识专栏与 SEO 专题 (ARTICLES) ================= */
.articles-hub-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(180deg, var(--tech-bg-deep) 0%, #111621 50%, var(--tech-bg-deep) 100%);
  z-index: 2;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.article-card-item {
  background: var(--tech-bg-surface);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 14px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--tech-transition);
}

.article-card-item:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.3);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
  color: var(--tech-silver-400);
  margin-bottom: 12px;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.article-tag {
  color: var(--tech-cyan-glow);
  font-weight: 600;
}

.article-item-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-item-excerpt {
  font-size: 0.85rem;
  color: var(--tech-silver-400);
  line-height: 1.6;
  margin-bottom: 20px;
}

.article-read-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--tech-cyan-glow);
}

.article-read-link:hover {
  color: #fff;
  transform: translateX(4px);
}

/* ================= 用户真实评价跑马灯 (REVIEWS) ================= */
.reviews-section {
  position: relative;
  padding: 80px 0;
  overflow: hidden;
  z-index: 2;
}

.marquee-container {
  display: flex;
  gap: 20px;
  overflow: hidden;
  user-select: none;
  padding: 20px 0;
}

.marquee-track {
  display: flex;
  gap: 20px;
  animation: scrollMarquee 38s linear infinite;
  min-width: 100%;
}

.marquee-container:hover .marquee-track {
  animation-play-state: paused;
}

@keyframes scrollMarquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.review-item-card {
  flex: 0 0 340px;
  background: var(--tech-bg-surface);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 12px;
  padding: 20px;
}

.review-user-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.review-author {
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
}

.review-stars {
  color: #f59e0b;
  font-size: 0.8rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.825rem;
  color: var(--tech-silver-300);
  line-height: 1.6;
}

/* ================= 常见问题解答 (FAQ) ================= */
.faq-section {
  position: relative;
  padding: 100px 0;
  background: linear-gradient(180deg, var(--tech-bg-deep) 0%, #0d1118 50%, var(--tech-bg-deep) 100%);
  z-index: 2;
}

.faq-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}

.faq-header h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--tech-bg-surface);
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--tech-transition);
}

.faq-item.active {
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
}

.faq-question h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
  margin: 0;
}

.faq-icon {
  width: 20px;
  height: 20px;
  stroke: var(--tech-silver-300);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  stroke: var(--tech-cyan-glow);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding-bottom: 22px;
}

.faq-answer p {
  font-size: 0.92rem;
  color: var(--tech-silver-300);
  line-height: 1.7;
}

/* ================= 官方页脚 (FOOTER) ================= */
.tech-footer {
  position: relative;
  background: #06070a;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  padding: 70px 0 30px;
  z-index: 2;
}

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

.footer-brand-info p {
  color: var(--tech-silver-400);
  font-size: 0.875rem;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 0.85rem;
  color: var(--tech-silver-400);
}

.footer-col a:hover {
  color: #fff;
}

.footer-seo-cloud {
  padding-top: 30px;
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  margin-bottom: 30px;
}

.footer-seo-cloud p {
  font-size: 0.78rem;
  color: var(--tech-silver-500);
  line-height: 1.8;
}

.footer-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(148, 163, 184, 0.08);
  font-size: 0.8125rem;
  color: var(--tech-silver-500);
  flex-wrap: wrap;
  gap: 12px;
}

/* 响应式断点控制 */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .unlock-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .plan-card.featured {
    transform: none;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .unlock-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom-bar {
    flex-direction: column;
    text-align: center;
  }
}