:root {
  --blue: #366dff;
  --blue-2: #edf3ff;
  --ink: #1d2231;
  --muted: #7c8496;
  --soft: #f6f8fc;
  --line: #e5eaf3;
  --green: #00dd8c;
  --tertiary: #9095a4;
  /* 白 / 清透蓝 交替，拉开模块层次，避开发灰的底色 */
  --band-home: #ffffff;
  --band-soft: #F6F9FF;
  --band-line: #e3ebff;
  --page: 1280px;
  --gutter: max(24px, calc((100vw - var(--page)) / 2));
  /* 整体略小于稿面：字号、间距、卡片一起收，避免大屏显得松散 */
  --ui-scale: 0.88;
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: #fff;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  /* 比例放大产生的横向溢出要裁在视口上。写在 body 上裁不住，刷新时滚动位置一偏就会在滚动条旁露出白边 */
  overflow-x: hidden;
  background-color: var(--band-home);
  background-image: none;
}
html, body { margin: 0; min-height: 100%; }
body {
  min-width: calc(1180px * var(--ui-scale));
  background: transparent;
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
button { border: 0; background: none; color: inherit; font: inherit; cursor: pointer; }
img { display: block; max-width: 100%; }
p, h1, h2, h3 { margin: 0; }

.page {
  position: relative;
  zoom: var(--ui-scale);
  /* 勿设 overflow-x: hidden + overflow-y: visible，否则 y 会被算成 auto，出现双滚动条；clip 不产生滚动容器 */
  overflow-x: clip;
  background: var(--band-home);
}

.wrap {
  width: var(--page);
  margin: 0 auto;
}

/* .wrap 区块的通栏底色：伪元素向两侧铺满视口，由 .page 的 overflow-x: clip 裁掉 */
.band {
  position: relative;
  isolation: isolate;
}

.band::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  z-index: -1;
  width: 200vmax;
  margin-left: -100vmax;
  pointer-events: none;
}

.band--home::before {
  background: var(--band-home);
}

.band--soft::before {
  background: var(--band-soft);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 64px;
  background: rgba(255, 255, 255, 0.4);
  /* border-bottom: 1px solid rgba(218, 224, 238, 0.45); */
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition:
    background 0.32s ease,
    border-color 0.32s ease,
    box-shadow 0.32s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.4);
  border-bottom-color: rgba(218, 224, 238, 0.45);
  /* box-shadow: 0 10px 28px rgba(29, 34, 49, 0.06); */
}

.header-inner {
  width: var(--page);
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header-left {
  display: flex;
  align-items: center;
  min-width: 0;
  max-width: 42%;
  flex: 0 1 auto;
  overflow: hidden;
}

.header-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
  min-width: 0;
  margin-left: auto;
  flex: 1 1 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--ink);
  text-decoration: none;
}

.brand-logo-slot {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  overflow: hidden;
}

.brand-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.header-divider {
  flex-shrink: 0;
  width: 1px;
  height: 32px;
  margin: 0 24px;
  background: var(--line);
}

.brand-slogan {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  color: #4d5669;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.4;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  min-width: 0;
  margin: 0;
  flex: 1 1 auto;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.site-nav::-webkit-scrollbar {
  height: 4px;
}

.site-nav::-webkit-scrollbar-thumb {
  border-radius: 2px;
  background: rgba(29, 34, 49, 0.18);
}

.site-nav a {
  flex: 0 0 auto;
  color: #4d5669;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.language-switch { position: relative; }

.language-trigger,
.header-download {
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

.language-trigger {
  gap: 6px;
  padding: 0 4px;
  border: 0;
  color: #2d3546;
  background: transparent;
  font-weight: 500;
}

.language-trigger img {
  display: block;
  flex-shrink: 0;
}

.language-chevron {
  opacity: 0.72;
}

.header-download {
  padding: 0 20px;
  border-radius: 12px;
  color: #fff;
  background: var(--blue);
  font-weight: 600;
  box-shadow: 0 8px 18px rgba(54, 109, 255, 0.18);
  transition:
    transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.25s ease,
    background 0.2s ease;
}

.header-download:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(54, 109, 255, 0.24);
}

.header-download:active {
  transform: translateY(0);
}

.language-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 138px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 16px 36px rgba(29, 34, 49, 0.1);
}

.language-menu button {
  width: 100%;
  padding: 9px 10px;
  border-radius: 8px;
  text-align: left;
  font-size: 13px;
}

.language-menu button[aria-selected="true"],
.language-menu button:hover {
  color: var(--blue);
  background: var(--blue-2);
}

.hero {
  position: relative;
  min-height: calc(100vh / var(--ui-scale) - 64px);
  max-height: calc(100vh / var(--ui-scale) - 64px);
  background: var(--band-home);
}

.hero-body {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh / var(--ui-scale) - 64px);
  padding: 32px 0;
  box-sizing: border-box;
}

/* 主文案 + 右侧卡片 + 城市滚动条作为一组整体垂直居中 */
.hero-main {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  min-height: 0;
}

.hero-stack {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-grid {
  position: relative;
  z-index: 1;
  flex: 0 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 512px 713px;
  /* 右侧视觉区与左侧文案等高：上缘对齐徽标，下缘对齐平台按钮 */
  align-items: stretch;
  justify-content: space-between;
  gap: 55px;
  min-height: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 34px;
  padding: 6px 16px;
  border: 1px solid #d7e2ff;
  border-radius: 17px;
  color: var(--blue);
  background: #f5f8ff;
  font-size: 16px;
  font-weight: 500;
}

.badge img {
  flex-shrink: 0;
}

.hero h1 {
  margin-top: 12px;
  font-size: 46px;
  line-height: 1.2;
  font-weight: 600;
}

.hero h1 span { color: var(--ink); }
.hero h1 :last-child { color: var(--blue); }

.hero-lead {
  width: 512px;
  margin-top: 12px;
  color: var(--tertiary);
  font-size: 16px;
  line-height: 1.5;
  font-weight: 400;
}

.hero-downloads {
  width: 516px;
  max-width: 100%;
  margin-top: 32px;
}

.hero-downloads .primary-download {
  width: 100%;
}

.primary-download {
  width: 516px;
  height: 72px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border-radius: 12px;
  color: #fff;
  background: var(--blue);
  font-size: 18px;
  font-weight: 500;
  white-space: nowrap;
  box-shadow: 0 12px 12px rgba(54, 109, 255, 0.2);
}

.primary-download img { filter: brightness(0) invert(1); }

.primary-download.is-unavailable {
  cursor: not-allowed;
  background: #e8ebf0;
  color: #9399a5;
  box-shadow: none;
  opacity: 1;
}

.primary-download.is-unavailable img {
  filter: grayscale(1) opacity(0.55);
}

.quick-platforms {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 24px;
}

.hero-downloads .quick-platforms {
  width: 100%;
  max-width: 100%;
  flex-wrap: nowrap;
  gap: 10px;
  margin-top: 16px;
}

.hero-downloads .quick-platforms a,
.hero-downloads .quick-platforms > span {
  flex: 1 1 0;
  width: 0;
  min-width: 0;
  max-width: none;
  height: 58px;
  padding: 0 6px;
  gap: 6px;
  font-size: 15px;
}

.hero-downloads .quick-platforms img {
  width: 20px;
  height: 20px;
}

.hero-downloads .quick-platforms .coming-soon-text strong,
.hero-downloads .quick-platforms .coming-soon-text b {
  font-size: 14px;
}

.hero-downloads .quick-platforms .coming-soon-text small {
  font-size: 11px;
}

.quick-platforms a,
.quick-platforms > span {
  width: 156px;
  min-width: 156px;
  max-width: 156px;
  height: 58px;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 12px;
  border-radius: 12px;
  background: #f3f5f7;
  color: var(--ink);
  font-size: 18px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
}

.quick-platforms img {
  flex-shrink: 0;
}

.quick-platforms .is-unavailable {
  cursor: not-allowed;
  background: #e8ebf0;
  color: #9399a5;
  border: 0;
  opacity: 1;
}

.quick-platforms .is-unavailable img {
  filter: grayscale(1) opacity(0.55);
}

.quick-platforms .is-coming-soon {
  gap: 10px;
}

.quick-platforms .coming-soon-text {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 2px;
  min-width: 0;
  width: auto;
  max-width: none;
  height: auto;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  line-height: 1.1;
  white-space: nowrap;
  color: inherit;
}

.quick-platforms .coming-soon-text strong,
.quick-platforms .coming-soon-text b {
  font-size: 16px;
  font-weight: 600;
  color: #7a8190;
}

.quick-platforms .coming-soon-text small {
  font-size: 12px;
  font-weight: 500;
  color: #a0a6b2;
}

.hero-visual {
  position: relative;
  width: 713px;
  margin-left: auto;
  flex-shrink: 0;
  overflow: visible;
}

/* 舞台右缘与内容区右缘（顶部「立即下载」按钮右缘）对齐，卡片都不越过这条线 */
.hero-visual-stage {
  position: relative;
  display: grid;
  grid-template-columns: 522px 168px;
  justify-content: space-between;
  width: 713px;
  height: 100%;
}

.hero-visual-stage::before {
  content: "";
  position: absolute;
  left: 40px;
  top: calc(50% - 210px);
  z-index: 0;
  width: 460px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(54, 109, 255, 0.18), rgba(54, 109, 255, 0) 72%);
  filter: blur(8px);
  pointer-events: none;
  animation: hero-glow-breathe 6s ease-in-out infinite;
}

.hero-orbit {
  position: absolute;
  left: 261px;
  top: 50%;
  z-index: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.hero-orbit i {
  position: absolute;
  left: 0;
  top: 0;
  border: 1px dashed rgba(54, 109, 255, 0.2);
  border-radius: 50%;
  animation: hero-orbit-spin 48s linear infinite;
}

.hero-orbit i::after {
  content: "";
  position: absolute;
  top: -4px;
  left: 50%;
  width: 8px;
  height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(54, 109, 255, 0.14), 0 0 14px rgba(54, 109, 255, 0.55);
}

.hero-orbit i:nth-child(1) { width: 380px; height: 380px; margin: -190px 0 0 -190px; animation-delay: -14s; }
.hero-orbit i:nth-child(2) { width: 500px; height: 500px; margin: -250px 0 0 -250px; animation-duration: 64s; animation-direction: reverse; animation-delay: -22s; }
.hero-orbit i:nth-child(3) { width: 600px; height: 600px; margin: -300px 0 0 -300px; border-color: rgba(54, 109, 255, 0.12); animation-duration: 90s; animation-delay: -58s; }
.hero-orbit i:nth-child(2)::after { background: var(--green); box-shadow: 0 0 0 4px rgba(0, 221, 140, 0.14), 0 0 14px rgba(0, 221, 140, 0.5); }
.hero-orbit i:nth-child(3)::after { width: 6px; height: 6px; margin-left: -3px; top: -3px; }

.route-card {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  padding-bottom: 14px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.4);
  box-shadow: 0 12px 40px 0 rgba(54, 109, 255, 0.06);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.route-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px 0;
  font-size: 18px;
  font-weight: 500;
}

.route-card-title {
  color: var(--ink);
  font-weight: 500;
}

.route-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--green);
  font-weight: 500;
  white-space: nowrap;
}

.route-status i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
}

.route-scan {
  position: relative;
  height: 2px;
  margin: 14px 18px 0;
  border-radius: 1px;
  background: rgba(54, 109, 255, 0.1);
  overflow: hidden;
}

.route-scan i {
  position: absolute;
  inset: 0 auto 0 0;
  width: 36%;
  border-radius: 1px;
  background: linear-gradient(90deg, transparent, var(--blue), var(--green), transparent);
  animation: route-scan-sweep 2.4s cubic-bezier(0.45, 0, 0.25, 1) infinite;
}

.route-main {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 14px 18px 0;
}

.route-main small {
  display: block;
  color: var(--tertiary);
  font-size: 18px;
  font-weight: 400;
}

.route-main b {
  display: block;
  margin-top: 2px;
  overflow: hidden;
  font-size: 32px;
  font-weight: 500;
  line-height: 1.25;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.route-main p {
  flex-shrink: 0;
  margin: 0 0 6px;
  color: var(--green);
  font-weight: 600;
  line-height: 1;
  font-family: "San Francisco Display", "PingFang SC", sans-serif;
}

.route-main strong { font-size: 42px; font-weight: 600; font-variant-numeric: tabular-nums; }
.route-main em { font-style: normal; font-size: 18px; font-weight: 600; }

.route-flow {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  padding: 12px 18px 0;
}

.route-flow span {
  display: flex;
  align-items: center;
  height: 38px;
  min-width: 0;
  max-width: 100%;
  flex: 0 1 auto;
  padding: 0 16px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.8);
  font-size: 16px;
  font-weight: 500;
}

.route-flow span b {
  display: block;
  min-width: 0;
  overflow: hidden;
  font-weight: inherit;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.route-flow i {
  position: relative;
  width: auto;
  height: 2px;
  min-width: 16px;
  max-width: 57px;
  flex: 1 100 57px;
  border-radius: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.95), rgba(54, 109, 255, 0.28));
  overflow: hidden;
}

.route-flow i::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 70%;
  background: linear-gradient(90deg, transparent, var(--blue), transparent);
  animation: motion-route-beam 2.1s ease-in-out infinite;
}

.route-flow i:nth-of-type(2)::after {
  animation-delay: 0.45s;
}

.route-flow-hub {
  position: relative;
  color: var(--blue);
  box-shadow: 0 0 0 0 rgba(54, 109, 255, 0.35);
  animation: route-hub-pulse 2.4s ease-out infinite;
}

.route-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: auto 18px 0;
  padding: 10px 0 0;
  list-style: none;
  background: transparent;
}

.route-list li {
  position: relative;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-radius: 12px;
  background: transparent;
  font-size: 16px;
  font-weight: 400;
  overflow: hidden;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}

.route-list li.is-selected {
  background: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

.route-list li.is-selected span::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--green);
  vertical-align: middle;
  animation: motion-status-pulse 2.4s ease-in-out infinite;
}

.route-list li.is-probing {
  box-shadow: inset 0 0 0 1px rgba(54, 109, 255, 0.22);
}

.route-list li.is-probing::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(54, 109, 255, 0.12), transparent);
  animation: route-row-probe 0.9s ease-out;
}

.route-list li span {
  min-width: 0;
  overflow: hidden;
  font-weight: inherit;
  color: var(--ink);
  white-space: nowrap;
  text-overflow: ellipsis;
}

.route-list li b {
  flex-shrink: 0;
  font-weight: inherit;
  color: var(--ink);
}

.route-list li b i {
  display: inline-block;
  min-width: 2ch;
  font-style: normal;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.route-list li.is-probing b i {
  color: var(--blue);
}

.route-list li.is-pending span,
.route-list li.is-pending b {
  color: var(--tertiary);
}

.route-status {
  transition: color 0.3s ease;
}

.route-status.is-testing {
  color: var(--blue);
}

.route-status.is-testing i {
  background: var(--blue);
  animation: route-testing-blink 0.8s ease-in-out infinite;
}

.route-main > div {
  min-width: 0;
  flex: 1 1 auto;
}

.route-main > div,
.route-main p,
.route-flow span:last-child {
  transition: opacity 0.35s ease;
}

.route-card.is-testing .route-main > div,
.route-card.is-testing .route-main p,
.route-card.is-testing .route-flow span:last-child {
  opacity: 0.35;
}

.route-card:not(.is-testing) .route-scan i {
  animation-duration: 4.8s;
  opacity: 0.45;
}

.route-list li b small {
  font-size: 12px;
  font-weight: inherit;
}

.speed-card,
.mode-card,
.nodes-card {
  position: relative;
  min-width: 0;
  overflow: hidden;
  padding: 14px 16px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.4);
  box-shadow: 0 12px 40px 0 rgba(54, 109, 255, 0.06);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  box-sizing: border-box;
}

/* 三张小卡在路线卡右侧竖排，首尾分别与路线卡上下缘对齐 */
.hero-side {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
}

.speed-card strong i,
.nodes-card strong {
  font-style: normal;
  font-variant-numeric: tabular-nums;
}

.speed-card strong small {
  margin-left: 2px;
  font-size: 16px;
  font-weight: 500;
  color: var(--tertiary);
}

.speed-bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 22px;
  margin-top: 8px;
}

.speed-bars i {
  flex: 1;
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--blue), rgba(54, 109, 255, 0.22));
  transform-origin: bottom;
  animation: speed-bar 1.4s ease-in-out var(--d, 0s) infinite;
}

.mode-track {
  position: relative;
  height: 4px;
  margin-top: 10px;
  border-radius: 2px;
  background: rgba(0, 221, 140, 0.14);
  overflow: hidden;
}

.mode-track i {
  position: absolute;
  inset: 0 auto 0 0;
  width: 40%;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(0, 221, 140, 0), var(--green));
  animation: mode-track-run 2.2s ease-in-out infinite;
}

.speed-card span,
.mode-card span,
.nodes-card span {
  display: block;
  max-width: 100%;
  overflow: hidden;
  color: var(--tertiary);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.4;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.speed-card strong,
.mode-card strong,
.nodes-card strong {
  display: block;
  max-width: 100%;
  margin-top: 2px;
  overflow: hidden;
  font-size: 26px;
  font-weight: 500;
  line-height: 1.25;
}

.speed-card strong,
.nodes-card strong {
  white-space: nowrap;
  text-overflow: ellipsis;
}

.mode-card strong {
  white-space: normal;
  overflow-wrap: anywhere;
  line-height: 1.2;
}

.hero-cities {
  position: relative;
  z-index: 1;
  flex: 0 0 auto;
  width: 100%;
  margin-top: 0;
  padding: 0;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 48px, #000 calc(100% - 48px), transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 48px, #000 calc(100% - 48px), transparent);
}

.hero-cities-track {
  display: flex;
  width: max-content;
  animation: hero-cities-marquee 36s linear infinite;
  will-change: transform;
}

.hero-cities-group {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-right: 20px;
  flex-shrink: 0;
}

.hero-city {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border: 1px solid #e8eef8;
  border-radius: 20px;
  color: #6b7385;
  background: #fff;
  box-shadow: 0 8px 24px 0 rgba(54, 109, 255, 0.05);
  font-size: 18px;
  font-weight: 500;
  line-height: normal;
  white-space: nowrap;
}

@keyframes hero-cities-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.feature-section {
  position: relative;
  padding: 120px 0;
  overflow-x: clip;
  background: var(--band-soft);
}

.feature-blob {
  position: absolute;
  z-index: 0;
  width: 680px;
  height: auto;
  max-width: none;
  pointer-events: none;
  user-select: none;
  transition: transform 14s cubic-bezier(0.37, 0.01, 0.22, 1);
  will-change: transform;
}

.feature-section .wrap {
  position: relative;
  z-index: 1;
}

.feature-blob--left {
  left: calc(50% - var(--page) / 2 - 480px);
  top: 36px;
  opacity: 0.2;
}

.feature-blob--right {
  right: calc(50% - var(--page) / 2 - 460px);
  top: 210px;
  transition-duration: 16s;
  opacity: 0.2;
}

.feature-head {
  max-width: 800px;
  margin: 0 auto 48px;
}

.feature-panel {
  height: 445px;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 12px 40px 0 rgba(54, 109, 255, 0.06);
  overflow: hidden;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 222px 223px;
  height: 100%;
}

.feature-grid article {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 40px 40px 32px;
  background: #fff;
}

.feature-grid article:nth-child(-n+3) {
  border-bottom: 1px solid #eef1f6;
}

.feature-grid article:not(:nth-child(3n)) {
  border-right: 1px solid #eef1f6;
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #f5f8ff;
  flex-shrink: 0;
}

.feature-icon img {
  width: 24px;
  height: 24px;
  max-width: none;
}

.feature-copy {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-grid h3 {
  color: #1d2231;
  font-size: 18px;
  line-height: 1.2;
}

.feature-grid p {
  color: #9095a4;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.4;
}

.phone-ghost span {
  display: block;
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: var(--blue);
  box-shadow: 0 8px 18px rgba(54, 109, 255, 0.2);
  content: "";
}

.section-head {
  text-align: center;
}

.section-head h2,
.faq-head h2,
.download-cta h2 {
  color: #1d2231;
  font-size: 36px;
  line-height: 1.4;
  font-weight: 500;
}

.section-head--lg h2 {
  color: #1d2231;
  font-size: 36px;
  line-height: 1.4;
  font-weight: 500;
}

.section-head--steps h2 {
  font-size: 36px;
  font-weight: 500;
}

.section-head p,
.faq-head p,
.download-cta p {
  margin-top: 12px;
  color: #9095a4;
  font-size: 18px;
}

.section-head--lg p {
  margin-top: 16px;
  color: #9095a4;
  font-size: 18px;
  line-height: 1.42;
}

.steps {
  padding: 110px 0 48px;
}

.step-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 50px;
}

.step-cards article {
  padding: 26px 26px 28px;
  border: 1px solid #eef2f8;
  border-radius: 8px;
  background: #fbfcff;
}

.step-art {
  height: 156px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  background: #f4f7fc;
}

.step-art::before {
  display: block;
  content: "";
}

.step-art--install::before {
  width: 28px;
  height: 22px;
  border-radius: 6px;
  background: var(--blue);
  box-shadow: 0 8px 18px rgba(54, 109, 255, 0.2);
}

.step-art--register::before {
  width: 28px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(135deg, #ffd24a 0%, #366dff 100%);
  box-shadow: 0 8px 18px rgba(54, 109, 255, 0.18);
}

.step-art--connect::before {
  width: 34px;
  height: 28px;
  border-radius: 6px;
  background:
    linear-gradient(#fff 0 22%, transparent 22% 38%, #fff 38% 52%, transparent 52% 68%, #fff 68%);
  background-color: var(--blue);
  box-shadow: 0 8px 18px rgba(54, 109, 255, 0.2);
}

.step-cards h3 {
  margin-top: 24px;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.3;
}

.step-cards p {
  min-height: 42px;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.step-cards a {
  display: inline-block;
  margin-top: 18px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
}

.use-cases {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100vh / var(--ui-scale) - 64px);
  box-sizing: border-box;
  padding: 120px 0;
  overflow: visible;
}

.use-cases .section-head--lg {
  flex: 0 0 auto;
  width: 100%;
  max-width: var(--page);
  margin: 0 auto 48px;
}

.use-cases .section-head--lg p {
  white-space: nowrap;
}

.use-cases .use-case-grid {
  flex: 0 0 auto;
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 413px);
  justify-content: space-between;
  gap: 20px;
}

.use-case-grid article {
  display: flex;
  flex-direction: column;
  height: 384px;
  padding: 20px;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 12px 40px 0 rgba(54, 109, 255, 0.06);
}

.use-case-art {
  flex: 0 0 auto;
  height: 196px;
  border-radius: 12px;
  overflow: hidden;
}

.use-case-art img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
}

.use-case-copy {
  margin-top: 20px;
}

.use-case-copy h3 {
  font-size: 18px;
  /* font-weight: 500; */
  line-height: 1.42;
}

.use-case-copy p {
  margin-top: 8px;
  color: var(--tertiary);
  font-size: 14px;
  line-height: 1.4;
}

.use-case-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: auto;
  padding-top: 20px;
  font-size: 18px;
  line-height: 1.4;
}

.use-case-stats span {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
}

.use-case-stats strong {
  color: var(--blue);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.42;
}

.use-case-stats em {
  font-style: normal;
  color: #7c8496;
  font-size: 18px;
  font-weight: 400;
}

.use-case-stats--solo {
  display: block;
}

.use-case-stats--solo strong {
  font-size: 18px;
}

.connect {
  --connect-motion: 0.45s;
  --connect-ease: cubic-bezier(0.22, 1, 0.36, 1);
  padding: 120px 0;
}

.connect-head {
  max-width: 800px;
  margin: 0 auto 80px;
}

.connect-grid {
  display: grid;
  grid-template-columns: 630px 630px;
  align-items: center;
  gap: 20px;
}

.connect-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 630px;
  height: 388px;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 12px 40px 0 rgba(54, 109, 255, 0.06);
  overflow: hidden;
}

.connect-visual img {
  width: 564px;
  height: 388px;
  max-width: none;
  object-fit: contain;
  opacity: 0;
  transform: translateX(-8px) scale(0.994);
  filter: blur(2px);
  transition:
    opacity var(--connect-motion) var(--connect-ease),
    transform var(--connect-motion) var(--connect-ease),
    filter var(--connect-motion) var(--connect-ease);
  will-change: opacity, transform, filter;
}

.connect-visual img.is-active {
  opacity: 1;
  transform: translateX(0) scale(1);
  filter: blur(0);
}

.connect-steps {
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.connect-steps li {
  display: grid;
  grid-template-columns: 86px 1fr;
  align-items: center;
  min-height: 116px;
  padding: 0 24px 0 20px;
  border: 1px solid transparent;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 12px 40px 0 rgba(54, 109, 255, 0.06);
  cursor: pointer;
  transition:
    border-color var(--connect-motion) var(--connect-ease),
    box-shadow var(--connect-motion) ease,
    transform var(--connect-motion) var(--connect-ease);
}

.connect-steps li.is-active {
  border-color: var(--blue);
  box-shadow: 0 12px 40px 0 rgba(54, 109, 255, 0.06);
  transform: translateX(4px);
}

.connect-num {
  font-size: 54px;
  font-weight: 500;
  line-height: 1;
  color: #e8ecf4;
  transition: color var(--connect-motion) var(--connect-ease);
}

.connect-steps li.is-active .connect-num {
  color: var(--blue);
}

.connect-copy h3 {
  font-size: 18px;
  /* font-weight: 500; */
  line-height: 1.42;
}

.connect-copy p {
  margin-top: 8px;
  color: var(--tertiary);
  font-size: 14px;
  line-height: 1.4;
}

.nodes {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100vh / var(--ui-scale) - 64px);
  max-height: calc(100vh / var(--ui-scale) - 64px);
  box-sizing: border-box;
  padding: 52px 0 32px;
  overflow: hidden;
  background: var(--band-home);
}

.nodes-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 64px;
  width: 100%;
  min-height: 0;
}

.section-head--nodes {
  flex: 0 0 auto;
  max-width: 720px;
  text-align: center;
}

.section-head--nodes h2 {
  color: #1d2231;
  font-size: 36px;
  font-weight: 500;
  line-height: 1.3;
}

.section-head--nodes p {
  margin-top: 12px;
  color: #9095a4;
  font-size: 18px;
  line-height: 1.45;
}

.nodes-map {
  position: relative;
  flex: 0 1 auto;
  width: min(825px, 100%);
  aspect-ratio: 1100 / 560;
  max-height: min(420px, 42vh);
  margin: 0 auto;
}

.nodes-map-bg {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: contain;
}

.nodes-pin {
  position: absolute;
  transform: translate(-50%, -50%);
  max-width: none;
  pointer-events: none;
}

.nodes-pin.pin-lg {
  width: 50px;
  height: 50px;
}

.nodes-pin.pin-md {
  width: 36px;
  height: 36px;
}

.nodes-pin.pin-sm {
  width: 26px;
  height: 26px;
}

.node-stats {
  flex: 0 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  width: min(820px, 100%);
  margin: 0;
  padding: 20px 64px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 12px 40px 0 rgba(54, 109, 255, 0.06);
  list-style: none;
}

.node-stats li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}

.node-stats strong {
  color: var(--blue);
  font-size: 26px;
  font-weight: 500;
  line-height: 40px;
}

.node-stats span {
  color: var(--ink);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.35;
}

.security {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100vh / var(--ui-scale) - 64px);
  max-height: calc(100vh / var(--ui-scale) - 64px);
  box-sizing: border-box;
  padding: 36px 0 28px;
  /* 不要 overflow:hidden，否则会裁掉 band 通栏背景 */
}

.security-inner {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
  width: var(--page);
  min-height: 0;
  flex: 0 1 auto;
}

.security-head {
  flex: 0 0 auto;
  max-width: 760px;
  margin: 0 auto;
}

.security-panel {
  --security-pad-top: 56px;
  --security-pad-bottom: 36px;
  --orbit-outer: 320px;
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: stretch;
  width: 100%;
  height: 480px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 24px;
  background: #ffffff;
  box-shadow: 0 12px 40px 0 rgba(54, 109, 255, 0.06);
}

.security-visual {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  min-height: 0;
  padding: var(--security-pad-top) 20px var(--security-pad-bottom);
  overflow: hidden;
  background: linear-gradient(165deg, #f4f8ff 0%, #ffffff 48%, #eef5ff 100%);
}

.security-stage {
  position: relative;
  width: 100%;
  height: 100%;
  max-width: 520px;
  display: grid;
  place-items: start center;
}

.security-glow {
  position: absolute;
  left: 50%;
  top: calc(var(--orbit-outer) / 2);
  z-index: 0;
  width: 200px;
  height: 200px;
  margin: -100px 0 0 -100px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(54, 109, 255, 0.28), rgba(0, 221, 140, 0.1), transparent 74%);
  animation: security-glow-breathe 3.6s ease-in-out infinite;
  pointer-events: none;
}

.security-orbit {
  position: absolute;
  left: 50%;
  top: calc(var(--orbit-outer) / 2);
  z-index: 1;
  width: 0;
  height: 0;
  pointer-events: none;
}

.security-orbit i {
  position: absolute;
  left: 0;
  top: 0;
  border: 2px solid rgba(54, 109, 255, 0.28);
  border-radius: 50%;
  animation: hero-orbit-spin 14s linear infinite;
}

.security-orbit i::after {
  content: "";
  position: absolute;
  top: -6px;
  left: 50%;
  width: 12px;
  height: 12px;
  margin-left: -6px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 5px rgba(54, 109, 255, 0.16), 0 0 16px rgba(54, 109, 255, 0.55);
}

.security-orbit i:nth-child(1) {
  width: 184px;
  height: 184px;
  margin: -92px 0 0 -92px;
}

.security-orbit i:nth-child(2) {
  width: 252px;
  height: 252px;
  margin: -126px 0 0 -126px;
  border-color: rgba(0, 221, 140, 0.3);
  animation-duration: 18s;
  animation-direction: reverse;
}

.security-orbit i:nth-child(2)::after {
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(0, 221, 140, 0.16), 0 0 16px rgba(0, 221, 140, 0.5);
}

.security-orbit i:nth-child(3) {
  width: var(--orbit-outer);
  height: var(--orbit-outer);
  margin: calc(var(--orbit-outer) / -2) 0 0 calc(var(--orbit-outer) / -2);
  border-style: dashed;
  border-color: rgba(54, 109, 255, 0.22);
  animation-duration: 24s;
}

.security-orbit i:nth-child(3)::after {
  width: 8px;
  height: 8px;
  margin-left: -4px;
  top: -4px;
  background: #7aa2ff;
}

.security-scan {
  position: absolute;
  left: 50%;
  top: calc(var(--orbit-outer) / 2);
  z-index: 2;
  width: 252px;
  height: 252px;
  margin: -126px 0 0 -126px;
  border-radius: 50%;
  pointer-events: none;
  overflow: hidden;
}

.security-scan i {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0 72%, rgba(54, 109, 255, 0.22) 78%, transparent 88% 100%);
  animation: hero-orbit-spin 3.2s linear infinite;
}

.security-core {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: calc(var(--orbit-outer) / 2);
  transform: translateY(-50%);
}

.security-hero-img {
  display: block;
  width: min(58%, 240px);
  height: auto;
  max-width: none;
  object-fit: contain;
  filter: drop-shadow(0 16px 28px rgba(54, 109, 255, 0.18));
  animation: motion-float-y-soft 3.8s ease-in-out infinite;
}

.security-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 16px;
  color: #00b874;
  background: rgba(0, 221, 140, 0.12);
  border: 1px solid rgba(0, 221, 140, 0.28);
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
}

.security-badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(0, 221, 140, 0.16);
  animation: motion-status-pulse 2s ease-in-out infinite;
}

.security-badge em {
  font-style: normal;
}

.security-tunnel {
  position: absolute;
  left: 50%;
  bottom: 0;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transform: translateX(-50%);
  white-space: nowrap;
}

.security-tunnel span {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 14px;
  border-radius: 17px;
  background: #fff;
  border: 1px solid #dce6ff;
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 8px 20px rgba(54, 109, 255, 0.08);
}

.security-tunnel span.is-hub {
  color: var(--blue);
  border-color: #c5d6ff;
  background: #f5f8ff;
}

.security-tunnel i {
  position: relative;
  width: 36px;
  height: 2px;
  border-radius: 1px;
  background: rgba(54, 109, 255, 0.18);
  overflow: hidden;
  flex-shrink: 0;
}

.security-tunnel i::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 55%;
  background: linear-gradient(90deg, transparent, var(--blue), transparent);
  animation: motion-route-beam 1.6s ease-in-out infinite;
}

.security-tunnel i:nth-of-type(2)::after {
  animation-delay: 0.35s;
}

.security-side {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 36px;
  width: 100%;
  height: 100%;
  min-height: 0;
  padding: var(--security-pad-top) 44px var(--security-pad-bottom) 36px;
  box-sizing: border-box;
  border-left: 1px solid #eef1f6;
  background: #fff;
}

.security-points {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.security-points li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.security-point-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: 12px;
  background: #f5f8ff;
}

.security-point-icon img {
  width: 22px;
  height: 22px;
  max-width: none;
}

.security-points h3 {
  color: var(--ink);
  font-size: 18px;

  line-height: 1.3;
}

.security-points p {
  margin-top: 4px;
  color: #5b657a;
  font-size: 14px;
  line-height: 1.5;
}

.security-download {
  /* align-self: center; */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 200px;
  height: 40px;
  margin-top: 0;
  padding: 0 48px;
  border-radius: 12px;
  color: #fff;
  background: var(--blue);
  font-size: 18px;
  font-weight: 500;
  box-shadow: 0 10px 24px rgba(54, 109, 255, 0.18);
}

@keyframes security-glow-breathe {
  0%, 100% { transform: scale(0.9); opacity: 0.65; }
  50% { transform: scale(1.12); opacity: 1; }
}

.faq {
  display: grid;
  grid-template-columns: 480px minmax(0, 720px);
  gap: 80px;
  align-items: start;
  padding: 110px 0;
}

.faq-head h2 {
  color: #1d2231;
  font-size: 36px;
  font-weight: 500;
  line-height: 1.4;
  text-align: left;
}

.faq-head p {
  margin-top: 16px;
  color: #9095a4;
  font-size: 18px;
  line-height: 1.42;
  text-align: left;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.faq-list details {
  border-bottom: 1px solid #dadcdf;
  padding-bottom: 24px;
}

.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 34px;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-q {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.42;
  color: var(--ink);
}

.faq-toggle {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  background: url("/assets/pc/accelerator-pc-v3/faq-icon-expand.svg") center / contain no-repeat;
}

.faq-list details[open] .faq-toggle {
  background-image: url("/assets/pc/accelerator-pc-v3/faq-icon-collapse.svg");
}

.faq-list details[open] summary {
  margin-bottom: 12px;
}

.faq-list p {
  margin: 0;
  color: var(--tertiary);
  font-size: 14px;
  line-height: 1.4;
}

.download-cta {
  padding: 120px 0;
}

.download-cta-card {
  position: relative;
  min-height: 476px;
  overflow: hidden;
  border-radius: 24px;
}

.download-cta-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.download-cta-bg img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
}

.download-cta-inner {
  position: relative;
  z-index: 1;
  padding: 80px 24px 72px;
  text-align: center;
}

.download-cta-inner h2 {
  color: #1d2231;
  font-size: 36px;
  font-weight: 500;
  line-height: 1.4;
}

.download-cta-inner p {
  margin-top: 16px;
  color: #9095a4;
  font-size: 18px;
  line-height: 1.42;
}

.download-actions {
  margin-top: 40px;
}

.download-cta .primary-download {
  width: auto;
  min-width: 259px;
  height: 72px;
  padding: 19px 32px;
  font-size: 18px;
  font-weight: 500;
}

.download-cta .primary-download img {
  width: 32px;
  height: 32px;
}

.download-cta .quick-platforms {
  justify-content: center;
  margin-top: 40px;
}

.download-cta .quick-platforms a,
.download-cta .quick-platforms > span {
  width: 156px;
  min-width: 156px;
  max-width: 156px;
  height: 58px;
  padding: 0 12px;
  box-sizing: border-box;
  font-size: 18px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
}

.download-cta .quick-platforms img {
  width: 24px;
  height: 24px;
  max-width: none;
}

.site-footer {
  position: relative;
  z-index: 2;
  padding: 80px 0 48px;
  border-radius: 32px 32px 0 0;
  color: rgba(255, 255, 255, 0.72);
  background: #000;
  box-sizing: border-box;
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 520px);
  gap: 24px 56px;
  align-items: start;
  width: var(--page);
  max-width: calc(100% - 48px);
  margin: 0 auto;
}

.footer-main:not(:has(.footer-links)) {
  grid-template-columns: minmax(0, 1fr) minmax(0, 520px);
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  min-width: 0;
}

.footer-brand strong {
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.footer-brand-desc {
  margin: 0;
  max-width: 36em;
  color: rgba(226, 232, 240, 0.62);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.65;
}

.footer-links {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: 10px;
  min-width: 0;
  justify-self: center;
}

.footer-links h3,
.footer-contact-block h3 {
  margin: 0;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
}

.footer-links a {
  color: rgba(226, 232, 240, 0.78);
  text-decoration: none;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.65;
  transition: color 0.18s ease;
}

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

.footer-contact-block {
  display: grid;
  align-content: start;
  gap: 10px;
  min-width: 0;
  width: 100%;
  justify-self: end;
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.footer-contact-card {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 56px;
  padding: 10px 14px;
  border-radius: 12px;
  color: #fff;
  text-align: left;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition:
    border-color 0.18s ease,
    background 0.18s ease;
}

.footer-contact-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(139, 183, 255, 0.35);
}

.footer-contact-icon {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.footer-contact-icon > img {
  width: 18px;
  height: 18px;
  display: block;
  object-fit: contain;
}

.footer-contact-text {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.footer-contact-card strong {
  display: block;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.1px;
  line-height: 1.3;
}

.footer-contact-card small {
  display: block;
  overflow: hidden;
  color: #888;
  font-size: 13px;
  font-weight: 400;
  line-height: 1.4;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-icp {
  margin: 4px 0 0;
  color: rgba(226, 232, 240, 0.42);
  font-size: 15px;
  line-height: 1.65;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 220px;
  padding: 14px 18px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 18px 46px rgba(29, 34, 49, 0.14);
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: opacity 0.24s ease, transform 0.24s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast span {
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.side-rail {
  position: fixed;
  right: 24px;
  bottom: 120px;
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.contact-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.side-fab {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid #e8ecf3;
  border-radius: 12px;
  color: var(--ink);
  background: #fff;
  box-shadow: 0 4px 16px rgba(67, 89, 128, 0.12);
  cursor: pointer;
  transition: color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease, opacity 0.22s ease;
}

.side-fab-icon,
.side-fab svg {
  width: 22px;
  height: 22px;
  display: block;
  object-fit: contain;
}

.side-fab:hover {
  box-shadow: 0 8px 20px rgba(67, 89, 128, 0.16);
  transform: translateY(-1px);
}

.side-fab[data-contact-type="wechat"]:hover { color: #07c160; }
.side-fab[data-contact-type="qq"]:hover { color: #12b7f5; }
.side-fab[data-contact-type="email"]:hover { color: #f59e0b; }
.side-fab[data-contact-type="telegram"]:hover { color: #2aabee; }

.back-top {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}

.back-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

/* —— Motion —— */
@keyframes motion-rise {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes motion-fade-in {
  from {
    opacity: 0;
    transform: translateX(32px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes motion-float-y {
  0%,
  100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes motion-float-y-soft {
  0%,
  100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes motion-status-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(0, 221, 140, 0.45);
  }
  50% {
    opacity: 0.85;
    transform: scale(1.15);
    box-shadow: 0 0 0 6px rgba(0, 221, 140, 0);
  }
}

@keyframes motion-route-beam {
  from { transform: translateX(-120%); }
  to { transform: translateX(220%); }
}

@keyframes motion-pin-pulse {
  0%,
  100% {
    opacity: 0.5;
    transform: translate(-50%, -50%) scale(0.9);
  }
  50% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.08);
  }
}

@keyframes motion-header-in {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes motion-hero-bg-breathe {
  0%,
  100% { opacity: 0.92; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.02); }
}

@keyframes hero-glow-breathe {
  0%,
  100% { opacity: 0.7; transform: scale(0.96); }
  50% { opacity: 1; transform: scale(1.04); }
}

@keyframes hero-orbit-spin {
  to { transform: rotate(360deg); }
}

@keyframes route-scan-sweep {
  from { transform: translateX(-110%); }
  to { transform: translateX(290%); }
}

@keyframes route-hub-pulse {
  0% { box-shadow: 0 0 0 0 rgba(54, 109, 255, 0.35); }
  70%,
  100% { box-shadow: 0 0 0 10px rgba(54, 109, 255, 0); }
}

@keyframes route-testing-blink {
  0%,
  100% { opacity: 1; }
  50% { opacity: 0.25; }
}

@keyframes route-row-probe {
  from { transform: translateX(-100%); }
  to { transform: translateX(100%); }
}

@keyframes speed-bar {
  0%,
  100% { transform: scaleY(0.28); }
  50% { transform: scaleY(1); }
}

@keyframes mode-track-run {
  from { transform: translateX(-100%); }
  to { transform: translateX(250%); }
}

.site-header {
  animation: motion-header-in 0.65s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-bg img {
  animation: motion-hero-bg-breathe 18s ease-in-out infinite;
  transform-origin: center top;
}

.hero-copy > * {
  opacity: 0;
  animation: motion-rise 0.82s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero-copy .badge { animation-delay: 0.05s; }
.hero-copy h1 { animation-delay: 0.14s; }
.hero-copy .hero-lead { animation-delay: 0.24s; }
.hero-copy .hero-downloads { animation-delay: 0.36s; }

.hero-visual-stage {
  opacity: 0;
  animation: motion-fade-in 1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s forwards;
}

.route-status i {
  animation: motion-status-pulse 2.4s ease-in-out infinite;
}



.nodes-pin {
  animation: motion-pin-pulse 3.2s ease-in-out infinite;
}

.nodes-pin.pin-lg { animation-duration: 2.6s; }
.nodes-pin.pin-md { animation-duration: 3.1s; animation-delay: 0.35s; }
.nodes-pin.pin-sm { animation-duration: 3.8s; animation-delay: 0.65s; }

.nodes-pin:nth-child(3n) { animation-delay: 0.2s; }
.nodes-pin:nth-child(4n) { animation-delay: 0.5s; }
.nodes-pin:nth-child(5n) { animation-delay: 0.85s; }


[data-reveal] {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity 0.72s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.72s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

[data-reveal].is-inview {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.58s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.58s cubic-bezier(0.22, 1, 0.36, 1);
}

[data-reveal-stagger].is-inview > *:nth-child(1) { transition-delay: 0.05s; }
[data-reveal-stagger].is-inview > *:nth-child(2) { transition-delay: 0.12s; }
[data-reveal-stagger].is-inview > *:nth-child(3) { transition-delay: 0.2s; }
[data-reveal-stagger].is-inview > *:nth-child(4) { transition-delay: 0.28s; }
[data-reveal-stagger].is-inview > *:nth-child(5) { transition-delay: 0.36s; }
[data-reveal-stagger].is-inview > *:nth-child(6) { transition-delay: 0.44s; }

[data-reveal-stagger].is-inview > * {
  opacity: 1;
  transform: translateY(0);
}

.primary-download,
.quick-platforms a,
.quick-platforms span,
.feature-grid article,
.use-case-grid article,
.security-download,
.footer-contact-card,
.download-cta-card,
.connect-visual {
  transition:
    transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.28s ease,
    border-color 0.22s ease,
    background 0.22s ease;
}

.primary-download:not(.is-unavailable):hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 28px rgba(54, 109, 255, 0.28);
}

.quick-platforms a:hover {
  transform: translateY(-2px);
  background: #e9edf3;
}

.feature-grid article:hover {
  background: #fafbff;
}

.use-case-grid article:hover {
  transform: translateY(-4px);
}

.security-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(54, 109, 255, 0.24);
}

.faq-list details {
  transition: background 0.25s ease;
}

.faq-list summary {
  transition: color 0.2s ease;
}

.faq-list details[open] {
  animation: motion-rise 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.language-menu:not([hidden]) {
  animation: motion-rise 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .hero-bg img,
  .hero-copy > *,
  .hero-visual-stage,
  .route-card,
  .speed-card,
  .mode-card,
  .nodes-card,
  .route-status i,
  .route-flow i::after,
  .hero-cities-track,
  .feature-blob,
  .nodes-pin,
  .security-hero-img,
  .security-glow,
  .security-orbit i,
  .security-scan i,
  .security-badge i,
  .security-tunnel i::after,
  .faq-list details[open],
  .language-menu:not([hidden]) {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .nodes-pin {
    transform: translate(-50%, -50%) !important;
  }

  .hero-visual-stage::before,
  .hero-orbit i,
  .route-scan i,
  .route-flow-hub,
  .route-list li.is-selected span::before,
  .route-list li.is-probing::after,
  .speed-bars i,
  .mode-track i {
    animation: none !important;
  }

  [data-reveal],
  [data-reveal-stagger] > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .connect-steps li.is-active {
    transform: none;
  }

  .connect-visual img {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
  }
}

@media (max-width: 1160px) {
  :root { --page: 1120px; }
  body { min-width: calc(1120px * var(--ui-scale)); }
  .hero-grid { grid-template-columns: 500px 540px; gap: 80px; }
  .primary-download { width: 460px; }
  .quick-platforms a,
  .quick-platforms > span {
    width: 138px;
    min-width: 138px;
    max-width: 138px;
  }
  .hero-visual { width: 713px; zoom: 0.757; }
  .security-panel {
    height: 440px;
    --security-pad-top: 28px;
    --security-pad-bottom: 20px;
  }
  .security-side { padding-right: 28px; padding-left: 28px; }
  .security-hero-img { width: min(56%, 210px); }
  .faq { grid-template-columns: 400px 650px; gap: 70px; }
}