/* Signal 下载中心 - 百变模板前缀 z866cb */
/* 兼容：Chrome / Edge / Firefox / Safari / iOS / Android */

/* ========== 重置与基础 ========== */
*,
*::before,
*::after {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

.z866cbbody {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: #0f172a;
  color: var(--z866cbink, #0f172a);
  background: #f5f7fb;
  background: var(--z866cbbg, #f5f7fb);
  line-height: 1.6;
  min-width: 0;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root {
  --z866cbblue: #3a76f0;
  --z866cbblue_dark: #2b5fd4;
  --z866cbink: #0f172a;
  --z866cbmuted: #5b6577;
  --z866cbline: #e2e8f0;
  --z866cbbg: #f5f7fb;
  --z866cbwhite: #ffffff;
  --z866cbradius: 16px;
  --z866cbshadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  --z866cbmax: 1120px;
  --z866cbheader_h: 72px;
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: rgba(58, 118, 240, 0.15);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}

button {
  font: inherit;
  color: inherit;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: rgba(58, 118, 240, 0.15);
}

/* 容器：padding + max-width，避免 min()/calc 兼容问题 */
.z866cbcontainer {
  width: 100%;
  max-width: 1120px;
  max-width: var(--z866cbmax, 1120px);
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
  padding-left: calc(16px + env(safe-area-inset-left, 0px));
  padding-right: calc(16px + env(safe-area-inset-right, 0px));
}

/* ========== 顶部导航 ========== */
.z866cbheader {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  height: var(--z866cbheader_h, 72px);
  background: #ffffff;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #e2e8f0;
  border-bottom-color: var(--z866cbline, #e2e8f0);
}

.z866cbnav_wrap {
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  gap: 16px;
}

.z866cblogo {
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  white-space: nowrap;
  min-width: 0;
  -ms-flex-negative: 0;
  flex-shrink: 0;
}

.z866cblogo_mark {
  width: 28px;
  height: 28px;
  -ms-flex-negative: 0;
  flex-shrink: 0;
  border-radius: 8px;
  background: #3a76f0;
  background: -webkit-linear-gradient(305deg, #5b8cff, #3a76f0 55%, #2b5fd4);
  background: linear-gradient(145deg, #5b8cff, #3a76f0 55%, #2b5fd4);
  -webkit-box-shadow: 0 6px 14px rgba(58, 118, 240, 0.35);
  box-shadow: 0 6px 14px rgba(58, 118, 240, 0.35);
  position: relative;
}

.z866cblogo_mark::after {
  content: "";
  position: absolute;
  top: 7px;
  right: 6px;
  bottom: 7px;
  left: 8px;
  border: 2px solid #fff;
  border-radius: 6px 6px 8px 4px;
  border-left-width: 0;
  -webkit-transform: skewX(-8deg);
  -ms-transform: skewX(-8deg);
  transform: skewX(-8deg);
}

.z866cblogo_text {
  overflow: hidden;
  text-overflow: ellipsis;
}

.z866cbnav_list {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.z866cbnav_item {
  margin: 0 4px;
}

.z866cbnav_link {
  display: block;
  padding: 10px 14px;
  border-radius: 999px;
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
  font-size: 0.95rem;
  font-weight: 500;
  -webkit-transition: background 0.2s, color 0.2s;
  transition: background 0.2s, color 0.2s;
  min-height: 44px;
  line-height: 24px;
}

.z866cbnav_link:hover,
.z866cbnav_link:focus,
.z866cbnav_link_active {
  color: #3a76f0;
  color: var(--z866cbblue, #3a76f0);
  background: rgba(58, 118, 240, 0.1);
  outline: none;
}

.z866cbnav_toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid #e2e8f0;
  border-color: var(--z866cbline, #e2e8f0);
  border-radius: 10px;
  background: #fff;
  background: var(--z866cbwhite, #fff);
  padding: 0;
  cursor: pointer;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -ms-flex-negative: 0;
  flex-shrink: 0;
}

.z866cbnav_toggle_bar {
  display: block;
  width: 18px;
  height: 2px;
  margin: 2.5px 0;
  background: #0f172a;
  background: var(--z866cbink, #0f172a);
  border-radius: 2px;
}

/* ========== 主横幅 ========== */
.z866cbhero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 80px;
  /* 移动端地址栏：vh + dvh 双写 */
  min-height: calc(100vh - 72px);
  min-height: calc(100dvh - 72px);
  min-height: calc(100vh - var(--z866cbheader_h, 72px));
  min-height: calc(100dvh - var(--z866cbheader_h, 72px));
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

.z866cbhero_bg {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: #eef3ff;
  background:
    -webkit-radial-gradient(15% 20%, ellipse 80% 60%, rgba(91, 140, 255, 0.28), transparent 55%),
    -webkit-radial-gradient(85% 70%, ellipse 70% 50%, rgba(58, 118, 240, 0.18), transparent 50%),
    -webkit-linear-gradient(290deg, #eef3ff 0%, #f7f9fc 45%, #e8eef8 100%);
  background:
    radial-gradient(ellipse 80% 60% at 15% 20%, rgba(91, 140, 255, 0.28), transparent 55%),
    radial-gradient(ellipse 70% 50% at 85% 70%, rgba(58, 118, 240, 0.18), transparent 50%),
    linear-gradient(160deg, #eef3ff 0%, #f7f9fc 45%, #e8eef8 100%);
  z-index: 0;
}

.z866cbhero_bg::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-image:
    -webkit-linear-gradient(rgba(58, 118, 240, 0.04) 1px, transparent 1px),
    -webkit-linear-gradient(90deg, rgba(58, 118, 240, 0.04) 1px, transparent 1px);
  background-image:
    linear-gradient(rgba(58, 118, 240, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 118, 240, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: -webkit-linear-gradient(top, #000 30%, transparent 95%);
  -webkit-mask-image: linear-gradient(180deg, #000 30%, transparent 95%);
  mask-image: linear-gradient(180deg, #000 30%, transparent 95%);
}

.z866cbhero_inner {
  position: relative;
  z-index: 1;
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1.15fr 48px 0.85fr;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  width: 100%;
}

.z866cbhero_content {
  min-width: 0;
}

.z866cbhero_eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(58, 118, 240, 0.2);
  color: #2b5fd4;
  color: var(--z866cbblue_dark, #2b5fd4);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.z866cbhero_title {
  margin: 0 0 16px;
  font-size: 2rem;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.z866cbhero_desc {
  margin: 0 0 28px;
  max-width: 36em;
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
  font-size: 1.05rem;
}

.z866cbhero_actions {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  margin: -6px;
}

.z866cbhero_actions .z866cbbtn {
  margin: 6px;
}

.z866cbbtn {
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  padding: 12px 22px;
  min-height: 44px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  -webkit-transition: -webkit-transform 0.15s, background 0.2s, box-shadow 0.2s, color 0.2s;
  transition: transform 0.15s, background 0.2s, box-shadow 0.2s, color 0.2s;
  cursor: pointer;
  text-align: center;
}

@media (hover: hover) and (pointer: fine) {
  .z866cbbtn:hover {
    -webkit-transform: translateY(-1px);
    -ms-transform: translateY(-1px);
    transform: translateY(-1px);
  }
}

.z866cbbtn:focus {
  outline: 2px solid #3a76f0;
  outline-offset: 2px;
}

.z866cbbtn_primary {
  background: #3a76f0;
  background: var(--z866cbblue, #3a76f0);
  color: #fff;
  -webkit-box-shadow: 0 10px 24px rgba(58, 118, 240, 0.35);
  box-shadow: 0 10px 24px rgba(58, 118, 240, 0.35);
}

@media (hover: hover) and (pointer: fine) {
  .z866cbbtn_primary:hover {
    background: #2b5fd4;
    background: var(--z866cbblue_dark, #2b5fd4);
  }
}

.z866cbbtn_ghost {
  background: rgba(255, 255, 255, 0.75);
  border-color: #e2e8f0;
  border-color: var(--z866cbline, #e2e8f0);
  color: #0f172a;
  color: var(--z866cbink, #0f172a);
}

@media (hover: hover) and (pointer: fine) {
  .z866cbbtn_ghost:hover {
    background: #fff;
  }
}

.z866cbbtn_block {
  width: 100%;
  margin-top: auto;
  background: rgba(58, 118, 240, 0.08);
  color: #2b5fd4;
  color: var(--z866cbblue_dark, #2b5fd4);
}

@media (hover: hover) and (pointer: fine) {
  .z866cbbtn_block:hover {
    background: #3a76f0;
    background: var(--z866cbblue, #3a76f0);
    color: #fff;
  }
}

.z866cbhero_visual {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  min-width: 0;
  width: 100%;
}

.z866cbhero_media {
  margin: 0;
  width: 100%;
  max-width: 480px;
  border-radius: 22px;
  overflow: hidden;
  -webkit-box-shadow: 0 24px 48px rgba(15, 23, 42, 0.16), 0 0 0 1px rgba(255, 255, 255, 0.35);
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.16), 0 0 0 1px rgba(255, 255, 255, 0.35);
  background: #0b3d3a;
  -webkit-animation: z866cbfloat 5s ease-in-out infinite;
  animation: z866cbfloat 5s ease-in-out infinite;
}

/* aspect-ratio 回退：旧浏览器用 padding 技巧 */
.z866cbhero_img {
  width: 100%;
  height: auto;
  display: block;
  -o-object-fit: cover;
  object-fit: cover;
  -o-object-position: center;
  object-position: center;
}

@supports (aspect-ratio: 16 / 9) {
  .z866cbhero_img {
    aspect-ratio: 16 / 9;
  }
}

@-webkit-keyframes z866cbfloat {
  0%, 100% { -webkit-transform: translateY(0); transform: translateY(0); }
  50% { -webkit-transform: translateY(-10px); transform: translateY(-10px); }
}

@keyframes z866cbfloat {
  0%, 100% { -webkit-transform: translateY(0); -ms-transform: translateY(0); transform: translateY(0); }
  50% { -webkit-transform: translateY(-10px); -ms-transform: translateY(-10px); transform: translateY(-10px); }
}

/* ========== 通用板块 ========== */
.z866cbsection {
  padding: 72px 0;
}

.z866cbsection_alt {
  background: #fff;
  background: var(--z866cbwhite, #fff);
}

.z866cbsection_head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 40px;
  padding: 0 4px;
}

.z866cbsection_title {
  margin: 0 0 10px;
  font-size: 1.55rem;
  font-size: clamp(1.55rem, 2.5vw, 2rem);
  letter-spacing: -0.02em;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.z866cbsection_desc {
  margin: 0;
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
}

.z866cbgrid {
  display: -ms-grid;
  display: grid;
  gap: 20px;
}

.z866cbgrid_3 {
  -ms-grid-columns: 1fr 20px 1fr 20px 1fr;
  grid-template-columns: repeat(3, 1fr);
}

.z866cbgrid_4 {
  -ms-grid-columns: 1fr 20px 1fr 20px 1fr 20px 1fr;
  grid-template-columns: repeat(4, 1fr);
}

/* ========== 下载平台 ========== */
.z866cbplatform {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  padding: 28px 24px;
  background: #fff;
  background: var(--z866cbwhite, #fff);
  border: 1px solid #e2e8f0;
  border-color: var(--z866cbline, #e2e8f0);
  border-radius: 16px;
  border-radius: var(--z866cbradius, 16px);
  -webkit-box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
  -webkit-transition: -webkit-transform 0.2s, box-shadow 0.2s;
  transition: transform 0.2s, box-shadow 0.2s;
  min-width: 0;
}

.z866cbplatform > * + * {
  margin-top: 12px;
}

@media (hover: hover) and (pointer: fine) {
  .z866cbplatform:hover {
    -webkit-transform: translateY(-4px);
    -ms-transform: translateY(-4px);
    transform: translateY(-4px);
    -webkit-box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
    box-shadow: var(--z866cbshadow, 0 18px 40px rgba(15, 23, 42, 0.08));
  }
}

.z866cbplatform_icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(58, 118, 240, 0.1);
  position: relative;
}

.z866cbplatform_icon::before,
.z866cbplatform_icon::after {
  content: "";
  position: absolute;
  background: #3a76f0;
  background: var(--z866cbblue, #3a76f0);
}

.z866cbplatform_icon_win::before {
  width: 22px;
  height: 22px;
  top: 13px;
  left: 13px;
  border-radius: 3px;
  -webkit-box-shadow: 0 0 0 2px rgba(58, 118, 240, 0.25);
  box-shadow: 0 0 0 2px rgba(58, 118, 240, 0.25);
}

.z866cbplatform_icon_mac::before {
  width: 18px;
  height: 22px;
  top: 12px;
  left: 15px;
  border-radius: 8px 8px 4px 4px;
  opacity: 0.9;
}

.z866cbplatform_icon_mac::after {
  width: 24px;
  height: 4px;
  bottom: 10px;
  left: 12px;
  border-radius: 2px;
  opacity: 0.45;
}

.z866cbplatform_icon_mobile::before {
  width: 16px;
  height: 26px;
  top: 11px;
  left: 16px;
  border-radius: 4px;
}

.z866cbplatform_icon_mobile::after {
  width: 6px;
  height: 2px;
  bottom: 14px;
  left: 21px;
  background: #fff;
  border-radius: 1px;
}

.z866cbplatform_title {
  margin: 4px 0 0;
  font-size: 1.15rem;
}

.z866cbplatform_text {
  margin: 0;
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
  font-size: 0.95rem;
  -webkit-box-flex: 1;
  -ms-flex: 1 1 auto;
  flex: 1 1 auto;
}

.z866cbplatform_meta {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
}

.z866cbplatform_meta li {
  padding: 4px 0;
  border-top: 1px dashed #e2e8f0;
  border-top-color: var(--z866cbline, #e2e8f0);
}

/* ========== 功能 ========== */
.z866cbfeature {
  padding: 24px 20px;
  border-radius: 16px;
  border-radius: var(--z866cbradius, 16px);
  background: #f5f7fb;
  background: var(--z866cbbg, #f5f7fb);
  border: 1px solid transparent;
  -webkit-transition: border-color 0.2s, background 0.2s;
  transition: border-color 0.2s, background 0.2s;
  min-width: 0;
}

@media (hover: hover) and (pointer: fine) {
  .z866cbfeature:hover {
    border-color: rgba(58, 118, 240, 0.25);
    background: #fff;
  }
}

.z866cbfeature_title {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: #2b5fd4;
  color: var(--z866cbblue_dark, #2b5fd4);
}

.z866cbfeature_text {
  margin: 0;
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
  font-size: 0.92rem;
}

/* ========== 安装步骤 ========== */
.z866cbsteps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: -ms-grid;
  display: grid;
  gap: 16px;
}

.z866cbstep {
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 72px 16px 1fr;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  -webkit-box-align: start;
  -ms-flex-align: start;
  align-items: start;
  padding: 22px 24px;
  background: #fff;
  background: var(--z866cbwhite, #fff);
  border: 1px solid #e2e8f0;
  border-color: var(--z866cbline, #e2e8f0);
  border-radius: 16px;
  border-radius: var(--z866cbradius, 16px);
  min-width: 0;
}

.z866cbstep_num {
  font-size: 1.5rem;
  font-weight: 700;
  color: #3a76f0;
  color: var(--z866cbblue, #3a76f0);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.z866cbstep_body {
  min-width: 0;
}

.z866cbstep_title {
  margin: 0 0 6px;
  font-size: 1.1rem;
}

.z866cbstep_text {
  margin: 0;
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
}

/* ========== 亮点条 ========== */
.z866cbhighlight_row {
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr 16px 1fr 16px 1fr;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.z866cbhighlight_item {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  padding: 28px 24px;
  text-align: center;
  border-radius: 16px;
  border-radius: var(--z866cbradius, 16px);
  background: #eef3ff;
  background: -webkit-linear-gradient(290deg, #eef3ff, #f8fafc);
  background: linear-gradient(160deg, #eef3ff, #f8fafc);
  border: 1px solid rgba(58, 118, 240, 0.12);
  min-width: 0;
}

.z866cbhighlight_item > * + * {
  margin-top: 6px;
}

.z866cbhighlight_label {
  font-size: 1.1rem;
  color: #0f172a;
  color: var(--z866cbink, #0f172a);
}

.z866cbhighlight_value {
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
  font-size: 0.95rem;
}

/* ========== FAQ ========== */
.z866cbfaq_list {
  max-width: 800px;
  margin: 0 auto;
  display: -ms-grid;
  display: grid;
  gap: 12px;
}

.z866cbfaq_item {
  background: #fff;
  background: var(--z866cbwhite, #fff);
  border: 1px solid #e2e8f0;
  border-color: var(--z866cbline, #e2e8f0);
  border-radius: 14px;
  padding: 4px 18px;
}

.z866cbfaq_q {
  cursor: pointer;
  display: block;
  list-style: none;
  padding: 16px 28px 16px 0;
  font-weight: 600;
  font-size: 1rem;
  position: relative;
  min-height: 44px;
}

.z866cbfaq_q::-webkit-details-marker {
  display: none;
}

.z866cbfaq_q::marker {
  content: "";
  display: none;
}

.z866cbfaq_q::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
  color: #3a76f0;
  color: var(--z866cbblue, #3a76f0);
  font-weight: 700;
  line-height: 1;
}

.z866cbfaq_item[open] .z866cbfaq_q::after {
  content: "\2013";
}

.z866cbfaq_a {
  margin: 0 0 16px;
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
  padding-right: 24px;
}

/* ========== 页脚 ========== */
.z866cbfooter {
  background: #0f172a;
  color: rgba(255, 255, 255, 0.78);
  padding: 40px 0 48px;
  padding-bottom: calc(48px + env(safe-area-inset-bottom, 0px));
}

.z866cbfooter_inner {
  text-align: center;
}

.z866cbfooter_brand {
  margin: 0 0 8px;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.z866cbfooter_copy {
  margin: 0 auto 16px;
  max-width: 520px;
  font-size: 0.9rem;
  line-height: 1.7;
}

.z866cbfooter_nav {
  margin: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}

.z866cbfooter_link {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  margin: 4px 10px;
  padding: 8px 4px;
  min-height: 44px;
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

@media (hover: hover) and (pointer: fine) {
  .z866cbfooter_link:hover {
    color: #fff;
  }
}

.z866cbfooter_link:focus {
  color: #fff;
  outline: 1px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

/* ========== 广告位 ========== */
.z866cbad {
  padding: 24px 0;
}

.z866cbad_inner {
  text-align: center;
  min-height: 0;
  overflow: hidden;
}

.z866cbad_inner script {
  display: block;
}

/* ========== 友情链接 ========== */
.z866cblinks {
  padding-top: 56px;
  padding-bottom: 56px;
}

.z866cbflink {
  text-align: center;
  margin-bottom: 16px;
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
  font-size: 0.95rem;
  line-height: 1.8;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.z866cbflink a {
  color: #3a76f0;
  color: var(--z866cbblue, #3a76f0);
  margin: 0 6px;
}

.z866cbrelate_list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}

.z866cbrelate_item {
  margin: 4px 6px;
}

.z866cbrelate_link {
  display: inline-block;
  padding: 8px 12px;
  min-height: 40px;
  line-height: 24px;
  border-radius: 8px;
  background: #f5f7fb;
  background: var(--z866cbbg, #f5f7fb);
  color: #5b6577;
  color: var(--z866cbmuted, #5b6577);
  font-size: 0.9rem;
  -webkit-transition: background 0.2s, color 0.2s;
  transition: background 0.2s, color 0.2s;
}

@media (hover: hover) and (pointer: fine) {
  .z866cbrelate_link:hover {
    background: rgba(58, 118, 240, 0.1);
    color: #3a76f0;
    color: var(--z866cbblue, #3a76f0);
  }
}

.z866cbfooter_stat {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
}

.z866cbfooter_stat p {
  margin: 0 0 6px;
}

.z866cbfooter_stat a {
  color: rgba(255, 255, 255, 0.85);
}

@media (hover: hover) and (pointer: fine) {
  .z866cbfooter_stat a:hover {
    color: #fff;
  }
}

/* ========== 大屏 PC ========== */
@media screen and (min-width: 1200px) {
  .z866cbhero_inner {
    gap: 56px;
  }

  .z866cbhero_media {
    max-width: 520px;
  }
}

/* ========== 平板 / 中屏 ========== */
@media screen and (max-width: 1024px) {
  .z866cbgrid_4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media screen and (max-width: 960px) {
  .z866cbhero_inner {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .z866cbhero {
    min-height: 0;
    padding: 48px 0 56px;
  }

  .z866cbhero_visual {
    -webkit-box-ordinal-group: 0;
    -ms-flex-order: -1;
    order: -1;
  }

  .z866cbhero_content {
    text-align: left;
  }

  .z866cbhero_media {
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
  }

  .z866cbgrid_3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .z866cbhighlight_row {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
  }
}

/* ========== 手机 ========== */
@media screen and (max-width: 768px) {
  .z866cbheader {
    height: 64px;
    height: var(--z866cbheader_h, 64px);
  }

  :root {
    --z866cbheader_h: 64px;
  }

  .z866cbnav_toggle {
    display: -webkit-inline-box;
    display: -ms-inline-flexbox;
    display: inline-flex;
  }

  .z866cbnav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
    border-bottom-color: var(--z866cbline, #e2e8f0);
    padding: 8px 16px 16px;
    padding-left: calc(16px + env(safe-area-inset-left, 0px));
    padding-right: calc(16px + env(safe-area-inset-right, 0px));
    display: none;
    -webkit-box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
    max-height: calc(100vh - 64px);
    max-height: calc(100dvh - 64px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .z866cbnav_open {
    display: block;
  }

  .z866cbnav_list {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: stretch;
    -ms-flex-align: stretch;
    align-items: stretch;
  }

  .z866cbnav_item {
    margin: 2px 0;
  }

  .z866cbnav_link {
    border-radius: 10px;
    padding: 12px 14px;
  }

  .z866cbgrid_3,
  .z866cbgrid_4 {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
  }

  .z866cbstep {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 18px 16px;
  }

  .z866cbsection {
    padding: 48px 0;
  }

  .z866cbsection_head {
    margin-bottom: 28px;
  }

  .z866cbhero_actions {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    margin: 0;
  }

  .z866cbhero_actions .z866cbbtn {
    width: 100%;
    margin: 0 0 10px;
  }

  .z866cbhero_actions .z866cbbtn:last-child {
    margin-bottom: 0;
  }

  .z866cbplatform {
    padding: 22px 18px;
  }

  .z866cbhero_title {
    font-size: 1.75rem;
  }

  .z866cbhero_desc {
    font-size: 1rem;
  }

  .z866cbfaq_item {
    padding: 4px 14px;
  }
}

/* ========== 小屏手机 ========== */
@media screen and (max-width: 480px) {
  .z866cbcontainer {
    padding-left: 12px;
    padding-right: 12px;
    padding-left: calc(12px + env(safe-area-inset-left, 0px));
    padding-right: calc(12px + env(safe-area-inset-right, 0px));
  }

  .z866cbhero {
    padding: 32px 0 40px;
  }

  .z866cbhero_media {
    border-radius: 16px;
  }

  .z866cblogo_text {
    font-size: 0.95rem;
    max-width: 52vw;
  }

  .z866cbhighlight_item {
    padding: 22px 16px;
  }

  .z866cbsection {
    padding: 40px 0;
  }
}

/* 横屏手机：避免横幅过高 */
@media screen and (max-height: 500px) and (orientation: landscape) {
  .z866cbhero {
    min-height: 0;
    padding: 28px 0 36px;
  }

  .z866cbhero_media {
    max-width: 280px;
    -webkit-animation: none;
    animation: none;
  }
}

/* ========== 减少动效 ========== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .z866cbhero_media,
  .z866cbbtn,
  .z866cbplatform,
  .z866cbfeature,
  .z866cbnav_link {
    -webkit-animation: none !important;
    animation: none !important;
    -webkit-transition: none !important;
    transition: none !important;
  }
}

/* 打印：保证可读 */
@media print {
  .z866cbheader,
  .z866cbnav_toggle,
  .z866cbhero_bg {
    display: none !important;
  }

  .z866cbbody {
    background: #fff;
    color: #000;
  }

  .z866cbhero_media {
    -webkit-box-shadow: none;
    box-shadow: none;
    -webkit-animation: none;
    animation: none;
  }

  a {
    text-decoration: underline;
  }
}