/* 跨境电商直播线路 — TK跨境直播专线落地页 */
:root {
  --mq-black: #0a0a0a;
  --mq-gray-900: #171717;
  --mq-gray-800: #263238;
  --mq-gray-700: #37474f;
  --mq-gray-600: #546e7a;
  --mq-gray-500: #78909c;
  --mq-gray-200: #eceff1;
  --mq-gray-100: #f5f5f5;
  --mq-gray-50: #fafafa;
  --mq-white: #fff;
  --mq-container: 80rem;
  --mq-font: "MiSans", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body.mq-page {
  font-family: var(--mq-font);
  background: var(--mq-white);
  color: var(--mq-black);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

img,
video {
  max-width: 100%;
  display: block;
}

/* ===== 导航 ===== */
.mq-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  transition: background 0.35s, border-color 0.35s, box-shadow 0.35s;
}

.mq-nav.is-solid {
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--mq-gray-200);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.mq-nav-inner {
  max-width: var(--mq-container);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.mq-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
  color: var(--mq-white);
  text-decoration: none;
}

.mq-brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.mq-brand-logo-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.mq-brand-title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
  background: none;
  -webkit-text-fill-color: currentColor;
  color: inherit;
}

.mq-nav.is-solid .mq-brand {
  color: var(--mq-black);
}

.mq-footer-logo {
  display: flex;
  align-items: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  color: var(--mq-black);
}

.mq-footer-logo-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.mq-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.mq-menu > li {
  position: relative;
}

.mq-menu-link {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  border-radius: 0.5rem;
  transition: background 0.2s, color 0.2s;
}

.mq-nav.is-solid .mq-menu-link {
  color: var(--mq-gray-800);
}

.mq-menu-link:hover {
  background: rgba(255, 255, 255, 0.1);
}

.mq-nav.is-solid .mq-menu-link:hover {
  background: var(--mq-gray-100);
}

.mq-menu-link svg {
  width: 1rem;
  height: 1rem;
  opacity: 0.7;
}

.mq-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  min-width: 220px;
  padding: 0.5rem;
  background: var(--mq-white);
  border-radius: 0.75rem;
  border: 1px solid var(--mq-gray-200);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
}

.mq-menu > li:hover .mq-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mq-dropdown a {
  display: block;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  color: var(--mq-gray-800);
  border-radius: 0.5rem;
}

.mq-dropdown a:hover {
  background: var(--mq-gray-100);
}

.mq-nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.mq-btn-login {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--mq-white);
  padding: 0.5rem 0.75rem;
}

.mq-nav.is-solid .mq-btn-login {
  color: var(--mq-gray-800);
}

.mq-btn-start {
  padding: 0.5rem 1.25rem;
  border-radius: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  background: var(--mq-white);
  color: var(--mq-gray-900);
  border: 1px solid rgba(255, 255, 255, 0.5);
  transition: transform 0.2s, box-shadow 0.2s;
}

.mq-nav.is-solid .mq-btn-start {
  background: var(--mq-gray-900);
  color: var(--mq-white);
  border-color: var(--mq-gray-900);
}

.mq-btn-start:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.mq-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--mq-white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

.mq-nav.is-solid .mq-nav-toggle {
  color: var(--mq-gray-900);
}

/* ===== Hero ===== */
.mq-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.mq-hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  background: #111827;
}

/* 视频加载失败时用本地封面图兜底 */
.mq-hero.mq-hero--fallback .mq-hero-video {
  display: none;
}

.mq-hero.mq-hero--fallback::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: url("../assets/images/Tiktok-usage-scenarios.jpg") center / cover no-repeat;
}

.mq-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top left, #111827, #1e293b);
  opacity: 0.8;
  z-index: 1;
}

.mq-hero-content {
  position: relative;
  z-index: 2;
  padding: 6rem 1.5rem 4rem;
  max-width: 56rem;
}

.mq-hero h1 {
  font-size: clamp(2rem, 5vw, 4.5rem);
  font-weight: 700;
  color: var(--mq-white);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.mq-typewriter-cursor {
  display: inline-block;
  animation: mq-blink 1s step-end infinite;
  margin-left: 2px;
  font-weight: 300;
}

@keyframes mq-blink {
  50% { opacity: 0; }
}

.mq-hero-lead {
  font-size: clamp(0.95rem, 2vw, 1.125rem);
  color: rgba(255, 255, 255, 0.82);
  max-width: 42rem;
  margin: 0 auto 3rem;
  line-height: 1.75;
  padding: 0 1rem;
}

.mq-hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: min(20rem, 90vw);
  height: 4rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--mq-white);
  font-size: 1.125rem;
  font-weight: 500;
  transition: transform 0.5s ease, box-shadow 0.5s ease, background 0.3s;
}

.mq-hero-cta:hover {
  transform: scale(1.05);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.mq-hero-cta svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ===== 通用区块 ===== */
.mq-section {
  padding: 6rem 2rem;
}

.mq-section--gradient {
  background: linear-gradient(to bottom right, var(--mq-gray-50), var(--mq-white));
}

.mq-section--gray {
  background: var(--mq-gray-50);
}

.mq-wrap {
  max-width: var(--mq-container);
  margin: 0 auto;
}

.mq-head {
  text-align: center;
  margin-bottom: 4rem;
  padding: 0 1rem;
}

.mq-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--mq-gray-900);
  margin-bottom: 1rem;
}

.mq-head p {
  font-size: 1.0625rem;
  color: var(--mq-gray-600);
  max-width: 48rem;
  margin: 0 auto;
  line-height: 1.75;
}

/* ===== 优势 ===== */
.mq-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .mq-features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .mq-features {
    grid-template-columns: repeat(3, 1fr);
  }
}

.mq-feature {
  text-align: center;
  padding: 2rem;
}

.mq-feature-icon-wrap {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1.5rem;
  background: var(--mq-gray-900);
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mq-feature-icon {
  width: 2rem;
  height: 2rem;
  color: var(--mq-white);
  transition: transform 0.3s ease-out;
}

.mq-feature h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--mq-gray-900);
  margin-bottom: 1rem;
}

.mq-feature p {
  color: var(--mq-gray-600);
  line-height: 1.75;
  font-size: 1rem;
}

/* ===== 应用场景（可展开） ===== */
.mq-scenarios {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  height: 40rem;
  overflow: hidden;
}

@media (min-width: 1024px) {
  .mq-scenarios {
    flex-direction: row;
    height: 32rem;
    gap: 1rem;
  }
}

.mq-scenario {
  position: relative;
  flex: 0.15;
  border-radius: 1rem;
  overflow: hidden;
  cursor: pointer;
  transition: flex 0.5s ease-out, transform 0.5s ease-out;
  min-height: 4rem;
}

@media (min-width: 1024px) {
  .mq-scenario {
    min-height: auto;
  }

  .mq-scenario.is-active {
    flex: 0.6;
    transform: scale(1);
  }

  .mq-scenario:not(.is-active) {
    flex: 0.2;
    transform: scale(0.98);
  }
}

.mq-scenario.is-active {
  flex: 0.4;
}

.mq-scenario-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: blur(2px);
  transition: transform 1s ease-out;
}

.mq-scenario.is-active .mq-scenario-bg {
  transform: scale(1.1);
}

.mq-scenario-shade {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: background 0.7s;
}

.mq-scenario.is-active .mq-scenario-shade {
  background: rgba(0, 0, 0, 0.5);
}

.mq-scenario-body {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.5rem;
  color: var(--mq-white);
}

.mq-scenario-logo {
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 0.5rem;
  filter: brightness(0) invert(1);
  transition: width 0.5s, height 0.5s;
}

.mq-scenario-logo--plain,
.mq-scenario-logo[src*="bigo"] {
  filter: none;
}

.mq-scenario.is-active .mq-scenario-logo {
  width: 3rem;
  height: 3rem;
}

.mq-scenario-title {
  font-size: 0.875rem;
  font-weight: 700;
  text-align: center;
}

@media (min-width: 1024px) {
  .mq-scenario:not(.is-active) .mq-scenario-title {
    display: block;
  }

  .mq-scenario.is-active .mq-scenario-title {
    font-size: 1.5rem;
    text-align: left;
    margin-bottom: 0.5rem;
  }
}

.mq-scenario-detail {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.5s, opacity 0.5s;
}

.mq-scenario.is-active .mq-scenario-detail {
  max-height: 24rem;
  opacity: 1;
}

.mq-scenario-sub {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

.mq-scenario-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.8125rem;
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.mq-scenario-list svg {
  width: 1rem;
  height: 1rem;
  color: #4ade80;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.mq-scenario-btns {
  display: none;
  gap: 0.75rem;
  margin-top: 1rem;
}

@media (min-width: 1024px) {
  .mq-scenario.is-active .mq-scenario-btns {
    display: flex;
  }
}

.mq-btn-white {
  padding: 0.625rem 1.25rem;
  background: var(--mq-white);
  color: var(--mq-gray-900);
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.mq-btn-outline {
  padding: 0.625rem 1.25rem;
  border: 1px solid var(--mq-white);
  color: var(--mq-white);
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.mq-btn-outline:hover {
  background: var(--mq-white);
  color: var(--mq-gray-900);
}

/* ===== 价格 ===== */
.mq-pricing {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

@media (min-width: 1024px) {
  .mq-pricing {
    flex-direction: row;
    justify-content: center;
    align-items: stretch;
    gap: 2.5rem;
  }
}

.mq-price-card {
  width: 100%;
  max-width: 396px;
  border-radius: 1.5rem;
  border: 1px solid var(--mq-gray-200);
  background: var(--mq-white);
  overflow: hidden;
}

.mq-price-card.is-featured {
  background: var(--mq-gray-800);
  border-color: transparent;
  color: var(--mq-white);
}

.mq-price-header {
  padding: 1.5rem 1.5rem 0;
  text-align: center;
}

.mq-price-badge {
  display: inline-flex;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  margin-bottom: 0.75rem;
  background: var(--mq-gray-100);
  color: var(--mq-gray-800);
}

.mq-price-card.is-featured .mq-price-badge {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
}

.mq-price-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.mq-price-amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
  font-weight: 600;
  line-height: 1;
}

.mq-price-amount .sym {
  font-size: 1.75rem;
}

.mq-price-amount .num {
  font-size: 3rem;
}

.mq-price-amount .unit {
  font-size: 1rem;
  opacity: 0.85;
}

.mq-price-desc {
  margin-top: 0.5rem;
  font-size: 0.9375rem;
  opacity: 0.8;
}

.mq-price-body {
  padding: 1.5rem;
}

.mq-price-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--mq-gray-200);
  font-size: 0.9375rem;
  color: var(--mq-gray-700);
}

.mq-price-card.is-featured .mq-price-features li {
  border-color: rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.95);
}

.mq-price-features svg {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.mq-btn-buy {
  display: block;
  width: 100%;
  margin-top: 1.5rem;
  padding: 0.875rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  background: linear-gradient(to right, var(--mq-gray-900), var(--mq-gray-800));
  color: var(--mq-white);
  transition: opacity 0.2s;
}

.mq-price-card.is-featured .mq-btn-buy {
  background: var(--mq-white);
  color: var(--mq-gray-900);
}

.mq-btn-buy:hover {
  opacity: 0.92;
}

/* ===== 流程 ===== */
.mq-process {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .mq-process {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .mq-process {
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
  }
}

.mq-process-item {
  background: var(--mq-white);
  border: 1px solid var(--mq-gray-200);
  border-radius: 1rem;
  padding: 1.5rem 1.5rem 1.5rem 5rem;
  position: relative;
  box-shadow: 0 4px 20px rgba(55, 71, 79, 0.06);
  min-height: 8rem;
}

.mq-process-icon {
  position: absolute;
  left: 1.25rem;
  top: 1.25rem;
  width: 3rem;
  height: 3rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mq-process-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.mq-process-icon--blue { background: #e3f2fd; color: #1976d2; }
.mq-process-icon--green { background: #e8f5e9; color: #388e3c; }
.mq-process-icon--orange { background: #fff3e0; color: #f57c00; }
.mq-process-icon--purple { background: #f3e5f5; color: #7b1fa2; }

.mq-process-item h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--mq-gray-900);
  margin-bottom: 0.5rem;
}

.mq-process-item p {
  font-size: 0.875rem;
  color: var(--mq-gray-600);
  line-height: 1.6;
}

/* ===== 知识卡片 ===== */
.mq-knowledge {
  border-radius: 1.5rem;
  overflow: hidden;
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: stretch;
}

.mq-knowledge-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.mq-knowledge-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, #111827, #1e293b);
  opacity: 0.9;
}

.mq-knowledge-overlay-2 {
  position: absolute;
  inset: 0;
  background: #000;
  opacity: 0.4;
}

.mq-knowledge-content {
  position: relative;
  z-index: 1;
  padding: 3rem 2rem;
  max-width: 52rem;
  color: var(--mq-white);
}

.mq-knowledge-label {
  font-weight: 700;
  font-size: 0.9375rem;
  margin-bottom: 0.5rem;
}

.mq-knowledge-content h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.mq-knowledge-content p {
  font-size: 1.0625rem;
  line-height: 1.75;
  opacity: 0.92;
  margin-bottom: 1.5rem;
}

.mq-btn-knowledge {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--mq-white);
  border-radius: 0.5rem;
  color: var(--mq-white);
  font-weight: 600;
  transition: background 0.2s, color 0.2s;
}

.mq-btn-knowledge:hover {
  background: var(--mq-white);
  color: var(--mq-gray-900);
}

/* ===== 页脚 ===== */
.mq-footer {
  background: var(--mq-gray-900);
  color: rgba(255, 255, 255, 0.75);
  padding: 4rem 2rem 2rem;
}

.mq-footer-grid {
  max-width: var(--mq-container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 768px) {
  .mq-footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.mq-footer-brand img {
  height: 32px;
  margin-bottom: 1rem;
  filter: brightness(0) invert(1);
}

.mq-footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 20rem;
}

.mq-footer-col h4 {
  color: var(--mq-white);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

.mq-footer-col a {
  display: block;
  font-size: 0.875rem;
  padding: 0.35rem 0;
  transition: color 0.2s;
}

.mq-footer-col a:hover {
  color: var(--mq-white);
}

.mq-footer-copy {
  max-width: var(--mq-container);
  margin: 2.5rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8125rem;
  text-align: center;
}

/* ===== 移动端导航 ===== */
@media (max-width: 1023px) {
  .mq-nav-toggle {
    display: block;
  }

  .mq-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--mq-white);
    padding: 1rem;
    border-bottom: 1px solid var(--mq-gray-200);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  }

  .mq-nav.is-open .mq-menu {
    display: flex;
  }

  .mq-nav.is-open .mq-menu-link {
    color: var(--mq-gray-800);
  }

  .mq-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: 1rem;
    display: none;
  }

  .mq-menu > li.is-expanded .mq-dropdown {
    display: block;
  }

  .mq-scenarios {
    height: auto;
  }

  .mq-scenario {
    flex: none !important;
    min-height: 12rem;
  }

  .mq-scenario-detail {
    max-height: none;
    opacity: 1;
  }

  .mq-scenario:not(.is-active) .mq-scenario-detail {
    display: none;
  }
}