/* Signal 下载首页 - 百变模板前缀 zcb7b1 */
/* 兼容 Chrome / Edge / Firefox / Safari / iOS / Android */

:root {
  --zcb7b1blue: #2c6bed;
  --zcb7b1blue_dark: #1b4fbf;
  --zcb7b1blue_soft: #e8f0fe;
  --zcb7b1ink: #152033;
  --zcb7b1muted: #5b677a;
  --zcb7b1line: #d8e0ec;
  --zcb7b1bg: #f5f8fc;
  --zcb7b1white: #ffffff;
  --zcb7b1radius: 14px;
  --zcb7b1shadow: 0 18px 40px rgba(21, 32, 51, 0.1);
  --zcb7b1max: 1120px;
  --zcb7b1header_h: 72px;
}

*,
*::before,
*::after {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

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

.zcb7b1body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #152033;
  color: var(--zcb7b1ink);
  background: #f5f8fc;
  background: var(--zcb7b1bg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: rgba(44, 107, 237, 0.18);
}

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

button {
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
}

.zcb7b1container {
  width: 94%;
  max-width: 1120px;
  max-width: var(--zcb7b1max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
  padding-left: max(16px, env(safe-area-inset-left));
  padding-right: max(16px, env(safe-area-inset-right));
}

/* ===== 顶部导航 ===== */
.zcb7b1header {
  position: relative;
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: 72px;
  min-height: var(--zcb7b1header_h);
  background: #ffffff;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(216, 224, 236, 0.9);
  padding-top: env(safe-area-inset-top);
}

.zcb7b1header_inner {
  min-height: 72px;
  min-height: var(--zcb7b1header_h);
  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;
}

.zcb7b1logo {
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  margin-right: 12px;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
  -ms-flex-negative: 0;
  flex-shrink: 0;
  color: #152033;
}

.zcb7b1logo_mark {
  width: 28px;
  height: 28px;
  margin-right: 8px;
  border-radius: 8px;
  background: linear-gradient(145deg, #4d84f5, #1b4fbf);
  box-shadow: 0 6px 14px rgba(44, 107, 237, 0.35);
  position: relative;
}

.zcb7b1logo_mark::after {
  content: "";
  position: absolute;
  top: 7px;
  right: 6px;
  bottom: 8px;
  left: 8px;
  border: 2.5px solid #fff;
  border-radius: 50% 50% 50% 12%;
  -webkit-transform: rotate(-18deg);
  transform: rotate(-18deg);
}

.zcb7b1nav {
  -webkit-box-flex: 1;
  -ms-flex: 1 1 auto;
  flex: 1 1 auto;
  min-width: 0;
}

.zcb7b1nav_list {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}

.zcb7b1nav_item {
  margin: 0 8px;
}

.zcb7b1nav_link {
  display: inline-block;
  padding: 8px 4px;
  font-size: 0.95rem;
  color: #5b677a;
  color: var(--zcb7b1muted);
  -webkit-transition: color 0.2s ease;
  transition: color 0.2s ease;
}

.zcb7b1nav_link:hover,
.zcb7b1nav_link:focus,
.zcb7b1nav_link:focus-visible {
  color: #2c6bed;
  color: var(--zcb7b1blue);
  outline: none;
}

.zcb7b1menu_toggle {
  display: none;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-left: 8px;
  border: 1px solid #d8e0ec;
  border-radius: 10px;
  background: #ffffff;
  cursor: pointer;
  padding: 0;
  -ms-flex-negative: 0;
  flex-shrink: 0;
}

.zcb7b1menu_bar {
  display: block;
  width: 18px;
  height: 2px;
  margin: 2.5px auto;
  background: #152033;
  border-radius: 2px;
}

/* ===== 按钮 ===== */
.zcb7b1btn {
  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;
  min-height: 44px;
  padding: 0.7rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  -webkit-transition: background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
  transition: background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.zcb7b1btn_primary {
  background: #2c6bed;
  background: var(--zcb7b1blue);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(44, 107, 237, 0.28);
}

.zcb7b1btn_ghost {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.45);
}

.zcb7b1btn_nav {
  -ms-flex-negative: 0;
  flex-shrink: 0;
  margin-left: 8px;
  background: #e8f0fe;
  background: var(--zcb7b1blue_soft);
  color: #1b4fbf;
  color: var(--zcb7b1blue_dark);
}

.zcb7b1btn_block {
  width: 100%;
}

@media (hover: hover) and (pointer: fine) {
  .zcb7b1btn:hover {
    -webkit-transform: translateY(-1px);
    transform: translateY(-1px);
  }

  .zcb7b1btn_primary:hover {
    background: #1b4fbf;
    background: var(--zcb7b1blue_dark);
  }

  .zcb7b1btn_ghost:hover {
    background: rgba(255, 255, 255, 0.28);
  }

  .zcb7b1btn_nav:hover {
    background: #d7e6ff;
  }

  .zcb7b1feature:hover {
    -webkit-transform: translateY(-4px);
    transform: translateY(-4px);
    box-shadow: 0 18px 40px rgba(21, 32, 51, 0.1);
    box-shadow: var(--zcb7b1shadow);
  }
}

/* ===== 主横幅 ===== */
.zcb7b1banner {
  position: relative;
  min-height: 560px;
  min-height: calc(100vh - 72px);
  min-height: calc(100dvh - 72px);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  overflow: hidden;
  color: #ffffff;
}

.zcb7b1banner_bg {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background:
    -webkit-radial-gradient(75% 30%, ellipse, rgba(120, 170, 255, 0.35), transparent 60%),
    -webkit-radial-gradient(15% 80%, ellipse, rgba(40, 90, 200, 0.45), transparent 55%),
    -webkit-linear-gradient(315deg, #1a4fd0 0%, #2c6bed 45%, #1746a8 100%);
  background:
    radial-gradient(ellipse 70% 55% at 75% 30%, rgba(120, 170, 255, 0.35), transparent 60%),
    radial-gradient(ellipse 50% 40% at 15% 80%, rgba(40, 90, 200, 0.45), transparent 55%),
    linear-gradient(135deg, #1a4fd0 0%, #2c6bed 45%, #1746a8 100%);
  z-index: 0;
}

.zcb7b1banner_bg::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  -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%);
}

.zcb7b1banner_inner {
  position: relative;
  z-index: 1;
  width: 100%;
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1.15fr 0.85fr;
  grid-template-columns: 1.15fr 0.85fr;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  padding-top: 72px;
  padding-bottom: 80px;
}

.zcb7b1banner_content {
  min-width: 0;
  padding-right: 24px;
}

.zcb7b1banner_brand {
  margin: 0 0 0.75rem;
  font-size: 2.4rem;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  word-wrap: break-word;
  overflow-wrap: break-word;
  -webkit-animation: zcb7b1fade_up 0.7s ease both;
  animation: zcb7b1fade_up 0.7s ease both;
}

.zcb7b1banner_title {
  margin: 0 0 1rem;
  font-size: 1.4rem;
  font-size: clamp(1.3rem, 2.4vw, 1.85rem);
  font-weight: 600;
  line-height: 1.35;
  -webkit-animation: zcb7b1fade_up 0.7s ease 0.08s both;
  animation: zcb7b1fade_up 0.7s ease 0.08s both;
}

.zcb7b1banner_desc {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  font-size: 1.02rem;
  color: rgba(255, 255, 255, 0.88);
  -webkit-animation: zcb7b1fade_up 0.7s ease 0.16s both;
  animation: zcb7b1fade_up 0.7s ease 0.16s both;
}

.zcb7b1banner_actions {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -webkit-animation: zcb7b1fade_up 0.7s ease 0.24s both;
  animation: zcb7b1fade_up 0.7s ease 0.24s both;
}

.zcb7b1banner_actions .zcb7b1btn {
  margin: 0 12px 12px 0;
}

.zcb7b1banner_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;
  -webkit-animation: zcb7b1float_in 0.9s ease 0.15s both;
  animation: zcb7b1float_in 0.9s ease 0.15s both;
}

.zcb7b1banner_figure {
  margin: 0;
  width: 100%;
  max-width: 520px;
  position: relative;
}

.zcb7b1banner_figure::before {
  content: "";
  position: absolute;
  top: 12%;
  right: 6%;
  bottom: 10%;
  left: 6%;
  border-radius: 50%;
  background: -webkit-radial-gradient(circle, rgba(164, 198, 57, 0.35), transparent 70%);
  background: radial-gradient(circle, rgba(164, 198, 57, 0.35), transparent 70%);
  -webkit-filter: blur(18px);
  filter: blur(18px);
  z-index: 0;
  pointer-events: none;
}

.zcb7b1banner_img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  display: block;
  border-radius: 22px;
  box-shadow:
    0 24px 48px rgba(8, 24, 56, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.18);
  -o-object-fit: cover;
  object-fit: cover;
}

/* ===== 通用板块 ===== */
.zcb7b1section {
  padding-top: 72px;
  padding-bottom: 72px;
}

.zcb7b1section_head {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 2.75rem;
}

.zcb7b1section_title {
  margin: 0 0 0.65rem;
  font-size: 1.7rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}

.zcb7b1section_desc {
  margin: 0;
  color: #5b677a;
  color: var(--zcb7b1muted);
  font-size: 1.02rem;
}

.zcb7b1grid {
  display: -ms-grid;
  display: grid;
}

.zcb7b1features {
  background: #ffffff;
  background: var(--zcb7b1white);
}

.zcb7b1features_grid {
  -ms-grid-columns: 1fr 1.25rem 1fr 1.25rem 1fr 1.25rem 1fr;
  grid-template-columns: repeat(4, 1fr);
}

.zcb7b1feature,
.zcb7b1download_item,
.zcb7b1step {
  min-width: 0;
}

.zcb7b1feature {
  margin: 0 0 20px;
  padding: 1.5rem 1.25rem;
  border: 1px solid #d8e0ec;
  border-radius: 14px;
  background: #ffffff;
  background: linear-gradient(180deg, #fff, #f8fbff);
  -webkit-transition: box-shadow 0.25s ease;
  transition: box-shadow 0.25s ease;
}

.zcb7b1feature_icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  margin-bottom: 1rem;
  background: #e8f0fe;
  background: var(--zcb7b1blue_soft);
  position: relative;
}

.zcb7b1feature_icon::before,
.zcb7b1feature_icon::after {
  content: "";
  position: absolute;
  background: #2c6bed;
  background: var(--zcb7b1blue);
}

.zcb7b1icon_lock::before {
  width: 16px;
  height: 14px;
  border-radius: 3px;
  left: 16px;
  top: 20px;
}

.zcb7b1icon_lock::after {
  width: 12px;
  height: 10px;
  border: 2.5px solid #2c6bed;
  background: transparent;
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  left: 18px;
  top: 11px;
}

.zcb7b1icon_vanish::before {
  width: 18px;
  height: 12px;
  border-radius: 3px;
  left: 15px;
  top: 18px;
  opacity: 0.95;
}

.zcb7b1icon_vanish::after {
  width: 10px;
  height: 2px;
  left: 19px;
  top: 34px;
  box-shadow: 12px 0 0 #2c6bed, -12px 0 0 #2c6bed;
  opacity: 0.45;
}

.zcb7b1icon_device::before {
  width: 12px;
  height: 20px;
  border-radius: 3px;
  left: 12px;
  top: 14px;
}

.zcb7b1icon_device::after {
  width: 16px;
  height: 12px;
  border-radius: 2px;
  left: 22px;
  top: 22px;
}

.zcb7b1icon_group::before {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  left: 12px;
  top: 14px;
  box-shadow: 12px 0 0 #2c6bed;
}

.zcb7b1icon_group::after {
  width: 22px;
  height: 10px;
  border-radius: 10px 10px 4px 4px;
  left: 13px;
  top: 28px;
}

.zcb7b1feature_title {
  margin: 0 0 0.5rem;
  font-size: 1.08rem;
}

.zcb7b1feature_text {
  margin: 0;
  color: #5b677a;
  color: var(--zcb7b1muted);
  font-size: 0.95rem;
}

/* ===== 下载中心 ===== */
.zcb7b1download {
  background: #f5f8fc;
  background:
    -webkit-radial-gradient(top right, circle, rgba(44, 107, 237, 0.08), transparent 40%),
    #f5f8fc;
  background:
    radial-gradient(circle at top right, rgba(44, 107, 237, 0.08), transparent 40%),
    var(--zcb7b1bg);
}

.zcb7b1download_grid {
  -ms-grid-columns: 1fr 1.25rem 1fr 1.25rem 1fr 1.25rem 1fr;
  grid-template-columns: repeat(4, 1fr);
}

.zcb7b1download_item {
  margin: 0 0 20px;
  padding: 1.6rem 1.3rem;
  border-radius: 14px;
  background: #ffffff;
  border: 1px solid #d8e0ec;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
}

.zcb7b1download_name {
  margin: 0;
  font-size: 1.15rem;
}

.zcb7b1download_meta {
  margin: 0 0 0.85rem;
  color: #5b677a;
  color: var(--zcb7b1muted);
  font-size: 0.92rem;
  -webkit-box-flex: 1;
  -ms-flex: 1 1 auto;
  flex: 1 1 auto;
}

/* ===== 安装指南 ===== */
.zcb7b1guide {
  background: #ffffff;
}

.zcb7b1steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr 1.25rem 1fr 1.25rem 1fr;
  grid-template-columns: repeat(3, 1fr);
}

.zcb7b1step {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: start;
  -ms-flex-align: start;
  align-items: flex-start;
  padding: 1.35rem 1.2rem;
  border-radius: 14px;
  border: 1px solid #d8e0ec;
  background: #f8fbff;
}

.zcb7b1step_num {
  -ms-flex-negative: 0;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  margin-right: 16px;
  border-radius: 50%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  background: #2c6bed;
  color: #fff;
  font-weight: 700;
}

.zcb7b1step_title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.zcb7b1step_text {
  margin: 0;
  color: #5b677a;
  color: var(--zcb7b1muted);
  font-size: 0.94rem;
}

/* ===== FAQ ===== */
.zcb7b1faq {
  background: #f5f8fc;
  background: var(--zcb7b1bg);
}

.zcb7b1faq_list {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.zcb7b1faq_item {
  background: #ffffff;
  border: 1px solid #d8e0ec;
  border-radius: 12px;
  padding: 0.9rem 1.15rem;
  margin-bottom: 0.85rem;
}

.zcb7b1faq_q {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: block;
  padding: 4px 0;
}

.zcb7b1faq_q::-webkit-details-marker {
  display: none;
}

.zcb7b1faq_q::marker {
  content: "";
  display: none;
}

.zcb7b1faq_q::after {
  content: "+";
  float: right;
  color: #2c6bed;
  font-weight: 700;
  margin-left: 12px;
}

.zcb7b1faq_item[open] .zcb7b1faq_q::after {
  content: "\2013";
}

.zcb7b1faq_a {
  margin: 0.75rem 0 0.2rem;
  color: #5b677a;
  color: var(--zcb7b1muted);
  font-size: 0.96rem;
  clear: both;
}

/* ===== 页脚 ===== */
.zcb7b1footer {
  background: #101a2b;
  color: rgba(255, 255, 255, 0.82);
  padding-top: 40px;
  padding-bottom: 40px;
  padding-bottom: calc(40px + env(safe-area-inset-bottom));
}

.zcb7b1footer_inner {
  text-align: center;
}

.zcb7b1footer_brand {
  margin: 0 0 0.35rem;
  font-weight: 700;
  color: #fff;
  font-size: 1.05rem;
}

.zcb7b1footer_copy {
  margin: 0 0 1.1rem;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.62);
}

.zcb7b1footer_nav {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}

.zcb7b1footer_link {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
  margin: 6px 12px;
}

.zcb7b1footer_link:hover,
.zcb7b1footer_link:focus {
  color: #fff;
}

/* ===== 广告位 ===== */
.zcb7b1ad {
  text-align: center;
  overflow: hidden;
}

.zcb7b1ad_top {
  padding: 12px 0 0;
  background: #ffffff;
}

.zcb7b1ad_mid {
  padding: 8px 0 24px;
  background: #f5f8fc;
}

.zcb7b1ad_foot {
  margin-top: 20px;
  padding-top: 12px;
}

.zcb7b1ad img,
.zcb7b1ad iframe {
  max-width: 100%;
  height: auto;
}

/* ===== 友情链接 ===== */
.zcb7b1flink {
  background: #ffffff;
  padding-top: 56px;
  padding-bottom: 56px;
}

.zcb7b1flink_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;
}

.zcb7b1flink_item {
  margin: 6px 10px;
}

.zcb7b1flink_link {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid #d8e0ec;
  border-radius: 8px;
  color: #5b677a;
  font-size: 0.92rem;
  background: #f8fbff;
  -webkit-transition: color 0.2s ease, border-color 0.2s ease;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.zcb7b1flink_link:hover,
.zcb7b1flink_link:focus {
  color: #2c6bed;
  border-color: #2c6bed;
}

/* ===== 统计代码 ===== */
.zcb7b1stats {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.58);
  line-height: 1.7;
}

.zcb7b1stats p {
  margin: 0 0 6px;
}

.zcb7b1stats a {
  color: rgba(255, 255, 255, 0.82);
}

.zcb7b1stats a:hover {
  color: #ffffff;
}

@supports (gap: 0.75rem) {
  .zcb7b1flink_list {
    gap: 0.75rem 1rem;
  }

  .zcb7b1flink_item {
    margin: 0;
  }
}

/* ===== 间距（现代浏览器 gap，旧浏览器靠 margin） ===== */
@supports (gap: 1rem) {
  .zcb7b1header_inner {
    gap: 1rem;
  }

  .zcb7b1logo {
    margin-right: 0;
  }

  .zcb7b1logo_mark {
    margin-right: 0;
  }

  .zcb7b1nav_list {
    gap: 0.15rem 0.35rem;
  }

  .zcb7b1nav_item {
    margin: 0;
  }

  .zcb7b1banner_inner {
    gap: 3rem;
  }

  .zcb7b1banner_content {
    padding-right: 0;
  }

  .zcb7b1banner_actions {
    gap: 0.85rem;
  }

  .zcb7b1banner_actions .zcb7b1btn {
    margin: 0;
  }

  .zcb7b1grid,
  .zcb7b1steps,
  .zcb7b1faq_list {
    gap: 1.25rem;
  }

  .zcb7b1feature,
  .zcb7b1download_item {
    margin-bottom: 0;
  }

  .zcb7b1faq_list {
    gap: 0.85rem;
  }

  .zcb7b1faq_item {
    margin-bottom: 0;
  }

  .zcb7b1download_item {
    gap: 0.45rem;
  }

  .zcb7b1step {
    gap: 1rem;
  }

  .zcb7b1step_num {
    margin-right: 0;
  }

  .zcb7b1footer_nav {
    gap: 0.85rem 1.35rem;
  }

  .zcb7b1footer_link {
    margin: 0;
  }
}

@supports (gap: 0.55rem) {
  .zcb7b1logo {
    gap: 0.55rem;
  }
}

/* ===== 动效 ===== */
@-webkit-keyframes zcb7b1fade_up {
  from {
    opacity: 0;
    -webkit-transform: translateY(18px);
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
    transform: translateY(0);
  }
}

@keyframes zcb7b1fade_up {
  from {
    opacity: 0;
    -webkit-transform: translateY(18px);
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
    transform: translateY(0);
  }
}

@-webkit-keyframes zcb7b1float_in {
  from {
    opacity: 0;
    -webkit-transform: translateY(28px) scale(0.96);
    transform: translateY(28px) scale(0.96);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0) scale(1);
    transform: translateY(0) scale(1);
  }
}

@keyframes zcb7b1float_in {
  from {
    opacity: 0;
    -webkit-transform: translateY(28px) scale(0.96);
    transform: translateY(28px) scale(0.96);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0) scale(1);
    transform: translateY(0) scale(1);
  }
}

/* ===== 笔记本 / 小桌面 ===== */
@media screen and (max-width: 1199px) {
  .zcb7b1features_grid,
  .zcb7b1download_grid {
    -ms-grid-columns: 1fr 1.25rem 1fr;
    grid-template-columns: repeat(2, 1fr);
  }

  .zcb7b1banner_inner {
    padding-top: 64px;
    padding-bottom: 64px;
  }
}

/* ===== 平板：导航收起，避免顶栏挤爆 ===== */
@media screen and (max-width: 991px) {
  .zcb7b1btn_nav {
    display: none;
  }

  .zcb7b1menu_toggle {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
  }

  .zcb7b1nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    background: #ffffff;
    border-bottom: 1px solid #d8e0ec;
    display: none;
    z-index: 120;
    -webkit-box-shadow: 0 12px 24px rgba(21, 32, 51, 0.08);
    box-shadow: 0 12px 24px rgba(21, 32, 51, 0.08);
  }

  .zcb7b1nav_open {
    display: block;
  }

  .zcb7b1nav_list {
    display: block;
    padding: 8px 16px 16px;
  }

  .zcb7b1nav_item {
    margin: 0;
    border-bottom: 1px solid #eef2f7;
  }

  .zcb7b1nav_link {
    display: block;
    padding: 14px 8px;
    font-size: 1rem;
  }

  .zcb7b1banner {
    min-height: 0;
  }

  .zcb7b1banner_inner {
    display: block;
    text-align: center;
    padding-top: 48px;
    padding-bottom: 56px;
  }

  .zcb7b1banner_content {
    padding-right: 0;
    margin-bottom: 32px;
  }

  .zcb7b1banner_desc {
    margin-left: auto;
    margin-right: auto;
  }

  .zcb7b1banner_actions {
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
  }

  .zcb7b1banner_figure {
    max-width: 460px;
    margin-left: auto;
    margin-right: auto;
  }

  .zcb7b1steps {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
  }

  .zcb7b1step {
    margin-bottom: 16px;
  }

  @supports (gap: 1rem) {
    .zcb7b1banner_inner {
      gap: 2.5rem;
    }

    .zcb7b1banner_content {
      margin-bottom: 0;
    }

    .zcb7b1step {
      margin-bottom: 0;
    }
  }
}

@media screen and (max-width: 991px) and (min-width: 641px) {
  .zcb7b1features_grid .zcb7b1feature,
  .zcb7b1download_grid .zcb7b1download_item {
    margin-bottom: 20px;
  }

  @supports (gap: 1.25rem) {
    .zcb7b1features_grid .zcb7b1feature,
    .zcb7b1download_grid .zcb7b1download_item {
      margin-bottom: 0;
    }
  }
}

/* ===== 手机 ===== */
@media screen and (max-width: 640px) {
  .zcb7b1container {
    width: auto;
    padding-left: 16px;
    padding-right: 16px;
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }

  .zcb7b1section {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .zcb7b1section_head {
    margin-bottom: 1.75rem;
  }

  .zcb7b1banner_inner {
    padding-top: 40px;
    padding-bottom: 44px;
  }

  .zcb7b1banner_figure {
    max-width: 100%;
  }

  .zcb7b1banner_img {
    border-radius: 16px;
  }

  .zcb7b1features_grid,
  .zcb7b1download_grid {
    -ms-grid-columns: 1fr;
    grid-template-columns: 1fr;
  }

  .zcb7b1feature,
  .zcb7b1download_item {
    margin-bottom: 16px;
  }

  .zcb7b1btn {
    min-height: 46px;
  }

  @supports (gap: 1.25rem) {
    .zcb7b1feature,
    .zcb7b1download_item {
      margin-bottom: 0;
    }
  }
}

/* 超小屏 */
@media screen and (max-width: 380px) {
  .zcb7b1banner_brand {
    font-size: 1.9rem;
  }

  .zcb7b1banner_actions .zcb7b1btn {
    width: 100%;
    margin-right: 0;
  }

  @supports (gap: 0.85rem) {
    .zcb7b1banner_actions .zcb7b1btn {
      width: auto;
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .zcb7b1banner_brand,
  .zcb7b1banner_title,
  .zcb7b1banner_desc,
  .zcb7b1banner_actions,
  .zcb7b1banner_visual,
  .zcb7b1btn,
  .zcb7b1feature {
    -webkit-animation: none !important;
    animation: none !important;
    -webkit-transition: none !important;
    transition: none !important;
    -webkit-transform: none !important;
    transform: none !important;
  }
}