/* ============================================================
   全站基础：AO3 官网红白黑配色
   参考上一版首页排版，样式与颜色已按 AO3 重新调整
   ============================================================ */
:root {
  --ao3_bg: #f8f5ef;
  --ao3_surface: #ffffff;
  --ao3_soft: #f7ece8;
  --ao3_ink: #201314;
  --ao3_muted: #75575c;
  --ao3_line: #e8d3ce;
  --ao3_accent: #990000;
  --ao3_cyan: #c20000;
  --ao3_lime: #ffd24d;
  --ao3_dark: #3a0b0d;
  --ao3_gradient: linear-gradient(90deg, #b30000, #6d0000);
  --ao3_radius: 6px;
  --ao3_download_url: "https://pan.quark.cn/s/eaa17ec65e00";
}

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

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  min-width: 320px;
  overflow-x: hidden;
  color: var(--ao3_ink);
  background: var(--ao3_bg);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

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

button {
  font-family: inherit;
  cursor: pointer;
}

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

.ao3_container {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

/* ============================================================
   顶部导航：左侧品牌，中间导航，右侧下载按钮
   ============================================================ */
.ao3_topbar {
  position: sticky;
  z-index: 100;
  top: 0;
  height: 72px;
  border-bottom: 1px solid var(--ao3_line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.ao3_topbar_inner {
  display: grid;
  grid-template-columns: 230px 1fr auto;
  align-items: center;
  height: 100%;
}

.ao3_brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  font-size: 18px;
  font-weight: 900;
}

.ao3_brand img {
  width: 44px;
  height: 44px;
  border: 1px solid var(--ao3_line);
  border-radius: 6px;
  object-fit: cover;
}

.ao3_brand_text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.ao3_brand_text small {
  margin-top: 3px;
  color: var(--ao3_muted);
  font-size: 10px;
  font-weight: 600;
}

.ao3_nav {
  display: flex;
  justify-content: center;
  gap: 30px;
}

.ao3_nav_link {
  color: #6e4a4e;
  font-size: 12px;
  font-weight: 800;
  transition: color 0.2s ease;
}

.ao3_nav_link:hover,
.ao3_nav_link_active {
  color: var(--ao3_accent);
}

.ao3_top_actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.ao3_top_button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 20px;
  border: 1px solid var(--ao3_accent);
  border-radius: 4px;
  color: #ffffff;
  background: var(--ao3_accent);
  font-size: 12px;
  font-weight: 900;
  box-shadow: 4px 4px 0 var(--ao3_ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ao3_top_button:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ao3_ink);
}

.ao3_menu_button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--ao3_line);
  border-radius: 4px;
  color: var(--ao3_ink);
  background: var(--ao3_surface);
  font-size: 20px;
  line-height: 1;
}

/* ============================================================
   首屏：左侧文案 + 右侧手机预览
   ============================================================ */
.ao3_hero {
  overflow: hidden;
  background:
    linear-gradient(120deg, rgba(179, 0, 0, 0.06), transparent 46%),
    linear-gradient(300deg, rgba(109, 0, 0, 0.1), transparent 40%),
    var(--ao3_surface);
}

.ao3_hero_grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(430px, 1.08fr);
  align-items: center;
  gap: clamp(38px, 6vw, 92px);
  padding: 88px 0 78px;
}

.ao3_hero_copy {
  position: relative;
  z-index: 2;
}

.ao3_hero_kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  color: var(--ao3_accent);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0;
}

.ao3_hero_kicker::before {
  width: 35px;
  height: 3px;
  background: var(--ao3_gradient);
  content: "";
}

.ao3_hero h1 {
  margin: 0;
  font-size: clamp(50px, 6vw, 78px);
  line-height: 1.02;
}

.ao3_hero h1 span {
  display: block;
  margin-top: 14px;
  background: var(--ao3_gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: clamp(20px, 2.1vw, 29px);
  font-weight: 900;
  line-height: 1.35;
}

.ao3_hero_desc {
  max-width: 570px;
  margin: 22px 0 0;
  color: var(--ao3_muted);
  font-size: 14px;
  line-height: 1.9;
}

.ao3_hero_buttons {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.ao3_primary_button {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  min-height: 62px;
  padding: 0 22px;
  border-radius: 5px;
  color: #ffffff;
  background: var(--ao3_gradient);
  box-shadow: 7px 7px 0 var(--ao3_ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ao3_primary_button:hover {
  transform: translate(3px, 3px);
  box-shadow: 3px 3px 0 var(--ao3_ink);
}

.ao3_button_icon {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  font-size: 20px;
}

.ao3_button_text {
  display: flex;
  flex-direction: column;
  font-size: 15px;
  font-weight: 900;
  line-height: 1.25;
}

.ao3_button_text small {
  font-size: 10px;
  font-weight: 600;
  opacity: 0.82;
}

.ao3_hero_note {
  display: flex;
  flex-direction: column;
  color: var(--ao3_muted);
  font-size: 10px;
  line-height: 1.6;
}

.ao3_hero_note b {
  color: var(--ao3_ink);
  font-size: 12px;
}

.ao3_hero_stats {
  display: flex;
  gap: 24px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--ao3_line);
}

.ao3_hero_stat {
  display: flex;
  flex-direction: column;
  color: var(--ao3_muted);
  font-size: 10px;
}

.ao3_hero_stat b {
  margin-bottom: 4px;
  color: var(--ao3_ink);
  font-size: 19px;
}

.ao3_hero_visual {
  position: relative;
  min-height: 640px;
}

.ao3_phone {
  position: absolute;
  z-index: 2;
  top: 0;
  right: 0;
  width: min(300px, 58%);
  padding: 10px;
  border: 2px solid var(--ao3_ink);
  border-radius: 24px;
  background: var(--ao3_ink);
  box-shadow: 17px 17px 0 var(--ao3_lime);
  animation: ao3_float 5s ease-in-out infinite;
}

.ao3_phone_image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
}

@keyframes ao3_float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-9px);
  }
}

.ao3_hero_panel {
  position: absolute;
  z-index: 3;
  bottom: 6%;
  left: 0;
  width: min(330px, 44%);
  border: 1px solid var(--ao3_line);
  border-radius: 6px;
  background: var(--ao3_surface);
  box-shadow: 11px 11px 0 rgba(60, 0, 0, 0.12);
  animation: ao3_float 6s ease-in-out 0.6s infinite;
}

.ao3_hero_panel_head {
  display: flex;
  justify-content: space-between;
  padding: 15px 17px;
  border-bottom: 1px solid var(--ao3_line);
  font-size: 10px;
  font-weight: 900;
}

.ao3_hero_panel_head i {
  color: var(--ao3_accent);
  font-style: normal;
}

.ao3_hero_panel_row {
  display: grid;
  grid-template-columns: 35px 1fr auto;
  align-items: center;
  gap: 11px;
  min-height: 70px;
  padding: 13px 17px;
  border-bottom: 1px solid var(--ao3_line);
}

.ao3_hero_panel_row:last-child {
  border-bottom: 0;
}

.ao3_hero_panel_row > b {
  display: grid;
  width: 32px;
  height: 38px;
  place-items: center;
  border-radius: 4px;
  color: #ffffff;
  background: var(--ao3_gradient);
  font-size: 10px;
}

.ao3_hero_panel_row span,
.ao3_hero_panel_row small {
  display: block;
}

.ao3_hero_panel_row span {
  font-size: 12px;
  font-weight: 800;
}

.ao3_hero_panel_row small {
  margin-top: 3px;
  color: var(--ao3_muted);
  font-size: 9px;
  font-weight: 500;
}

.ao3_hero_panel_row em {
  color: var(--ao3_accent);
  font-size: 9px;
  font-style: normal;
  font-weight: 900;
}

/* ============================================================
   通用区块
   ============================================================ */
.ao3_section {
  padding: 92px 0 100px;
}

.ao3_section_light {
  background: var(--ao3_surface);
}

.ao3_section_alt {
  background: var(--ao3_soft);
}

.ao3_section_head {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 0.55fr);
  align-items: end;
  gap: 12px 36px;
  margin-bottom: 32px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--ao3_line);
}

.ao3_section_head > .ao3_section_kicker {
  grid-column: 1 / -1;
}

.ao3_section_head h2 {
  grid-column: 1;
}

.ao3_section_head p {
  grid-column: 2;
}

.ao3_section_head_center {
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 34px;
  text-align: center;
}

.ao3_section_head_flat {
  display: grid;
  grid-template-columns: 1fr;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 26px;
  padding-bottom: 0;
  border-bottom: 0;
}

.ao3_section_head_flat > .ao3_section_kicker,
.ao3_section_head_flat h2,
.ao3_section_head_flat p {
  grid-column: 1;
}

.ao3_section_kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ao3_accent);
  font-size: 10px;
  font-weight: 900;
}

.ao3_section_kicker::before {
  width: 24px;
  height: 3px;
  background: var(--ao3_gradient);
  content: "";
}

.ao3_section_head h2,
.ao3_section_head_center h2,
.ao3_section_head_flat h2 {
  margin: 4px 0 0;
  font-size: 34px;
  line-height: 1.2;
}

.ao3_section_head p,
.ao3_section_head_center p,
.ao3_section_head_flat p {
  max-width: 520px;
  margin: 0;
  color: var(--ao3_muted);
  font-size: 12px;
  line-height: 1.8;
}

/* ============================================================
   产品展示：桌面端四列完整，手机端两列两排
   ============================================================ */
.ao3_product_grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.ao3_product_item {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--ao3_line);
  border-radius: var(--ao3_radius);
  background: var(--ao3_surface);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.ao3_product_item:hover {
  border-color: var(--ao3_accent);
  transform: translateY(-4px);
  box-shadow: 0 16px 28px rgba(60, 0, 0, 0.12);
}

.ao3_product_frame {
  overflow: hidden;
}

.ao3_product_frame img {
  width: 100%;
  height: auto;
  transition: transform 0.5s ease;
}

.ao3_product_item:hover .ao3_product_frame img {
  transform: scale(1.05);
}

.ao3_product_caption {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 10px;
  min-height: 62px;
  padding: 0 13px;
  border-top: 1px solid var(--ao3_line);
  background: var(--ao3_surface);
}

.ao3_product_caption b {
  color: var(--ao3_accent);
  font-size: 10px;
}

.ao3_product_caption strong,
.ao3_product_caption small {
  display: block;
}

.ao3_product_caption strong {
  font-size: 13px;
}

.ao3_product_caption small {
  margin-top: 2px;
  color: var(--ao3_muted);
  font-size: 9px;
}

.ao3_product_caption span {
  color: var(--ao3_cyan);
  font-size: 9px;
  font-weight: 900;
}

/* ============================================================
   最新版本 / 追剧档案
   ============================================================ */
.ao3_archive_grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  align-items: start;
  gap: 68px;
}

.ao3_archive_tabs {
  display: flex;
  margin-bottom: 20px;
}

.ao3_archive_tab {
  height: 40px;
  padding: 0 16px;
  border: 1px solid var(--ao3_line);
  border-right: 0;
  color: var(--ao3_muted);
  background: var(--ao3_surface);
  font-size: 10px;
  font-weight: 900;
}

.ao3_archive_tab:last-child {
  border-right: 1px solid var(--ao3_line);
}

.ao3_archive_tab:hover {
  border-color: var(--ao3_accent);
}

.ao3_archive_tab_active {
  color: #ffffff;
  border-color: var(--ao3_accent);
  background: var(--ao3_accent);
}

.ao3_archive_list {
  border-top: 3px solid var(--ao3_ink);
  background: var(--ao3_surface);
}

.ao3_archive_row {
  display: grid;
  grid-template-columns: 52px 1fr 90px;
  align-items: center;
  gap: 14px;
  min-height: 88px;
  padding: 0 16px;
  border-bottom: 1px solid var(--ao3_line);
  transition: border-color 0.2s ease;
}

.ao3_archive_row:not([hidden]) {
  animation: ao3_fade_in 0.35s ease;
}

.ao3_archive_row:hover {
  border-color: var(--ao3_accent);
}

.ao3_archive_row > b {
  color: var(--ao3_accent);
  font-size: 10px;
}

.ao3_archive_row h3 {
  margin: 0 0 5px;
  font-size: 14px;
}

.ao3_archive_row p {
  margin: 0;
  color: var(--ao3_muted);
  font-size: 10px;
}

.ao3_archive_row > span {
  color: #a40000;
  font-size: 9px;
  font-weight: 900;
  text-align: right;
}

@keyframes ao3_fade_in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ao3_version_card {
  position: relative;
  padding: 26px;
  border-radius: 8px;
  color: #ffffff;
  background:
    linear-gradient(160deg, rgba(255, 77, 77, 0.14), transparent 46%),
    var(--ao3_dark);
  box-shadow: 12px 12px 0 var(--ao3_lime);
}

.ao3_version_card small {
  color: var(--ao3_cyan);
  font-size: 9px;
  font-weight: 900;
}

.ao3_version_card strong {
  display: block;
  margin: 11px 0 8px;
  font-size: 30px;
  line-height: 1.2;
}

.ao3_version_card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 11px;
  line-height: 1.8;
}

.ao3_version_notes {
  display: grid;
  gap: 9px;
  margin: 18px 0 20px;
  padding: 0;
  list-style: none;
  font-size: 11px;
  font-weight: 700;
}

.ao3_version_notes li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ao3_version_notes li::before {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--ao3_lime);
  content: "";
}

.ao3_version_button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 44px;
  border-radius: 4px;
  color: var(--ao3_ink);
  background: var(--ao3_lime);
  font-size: 11px;
  font-weight: 900;
}

.ao3_version_button:hover {
  background: var(--ao3_cyan);
}

/* ============================================================
   使用流程
   ============================================================ */
.ao3_step_grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.ao3_step_item {
  padding: 24px;
  border: 1px solid var(--ao3_line);
  border-radius: var(--ao3_radius);
  background: var(--ao3_surface);
  transition: border-color 0.2s ease;
}

.ao3_step_item:nth-child(even) {
  border-color: var(--ao3_accent);
}

.ao3_step_item:hover {
  border-color: #b30000;
}

.ao3_step_number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  border-radius: 5px;
  color: #ffffff;
  background: var(--ao3_ink);
  font-size: 12px;
  font-weight: 900;
}

.ao3_step_item h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.ao3_step_item p {
  margin: 0;
  color: var(--ao3_muted);
  font-size: 11px;
  line-height: 1.8;
}

/* ============================================================
   常见问题
   ============================================================ */
.ao3_faq_grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  align-items: start;
  gap: 68px;
}

.ao3_faq_side h2 {
  margin: 8px 0 12px;
  font-size: 34px;
  line-height: 1.2;
}

.ao3_faq_side p {
  max-width: 300px;
  margin: 0;
  color: var(--ao3_muted);
  font-size: 12px;
  line-height: 1.8;
}

.ao3_faq_side_link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  padding-bottom: 5px;
  border-bottom: 2px solid var(--ao3_accent);
  color: var(--ao3_accent);
  font-size: 12px;
  font-weight: 900;
}

.ao3_faq_list {
  border-top: 3px solid var(--ao3_accent);
}

.ao3_faq_item {
  border-bottom: 1px solid var(--ao3_line);
  background: var(--ao3_surface);
}

.ao3_faq_item summary {
  display: grid;
  grid-template-columns: 48px 1fr 34px;
  align-items: center;
  width: 100%;
  min-height: 74px;
  padding: 0 18px;
  list-style: none;
  cursor: pointer;
}

.ao3_faq_item summary::-webkit-details-marker {
  display: none;
}

.ao3_faq_item summary span {
  color: var(--ao3_accent);
  font-size: 10px;
  font-weight: 900;
}

.ao3_faq_item summary strong {
  font-size: 14px;
}

.ao3_faq_item summary i {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid var(--ao3_line);
  border-radius: 50%;
  color: var(--ao3_accent);
  font-size: 17px;
  font-style: normal;
  transition: transform 0.2s ease;
}

.ao3_faq_item[open] summary i {
  transform: rotate(45deg);
}

.ao3_faq_item p {
  margin: 0;
  padding: 0 52px 22px;
  color: var(--ao3_muted);
  font-size: 11px;
  line-height: 1.85;
}

/* ============================================================
   用户评价
   ============================================================ */
.ao3_review_grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
  gap: 14px;
}

.ao3_review_item {
  padding: 22px;
  border: 1px solid var(--ao3_line);
  border-radius: var(--ao3_radius);
  background: var(--ao3_surface);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.ao3_review_item:hover {
  border-color: #b30000;
  transform: translateY(-3px);
  box-shadow: 0 12px 22px rgba(60, 0, 0, 0.08);
}

.ao3_review_stars {
  margin-bottom: 13px;
  color: var(--ao3_lime);
  font-size: 12px;
  letter-spacing: 0;
  text-shadow: 0 1px 0 var(--ao3_accent);
}

.ao3_review_item > p {
  margin: 0;
  color: #4a3438;
  font-size: 12px;
  line-height: 1.85;
}

.ao3_review_user {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--ao3_line);
}

.ao3_review_avatar {
  display: grid;
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  place-items: center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--ao3_ink);
  font-size: 13px;
  font-weight: 800;
}

.ao3_review_avatar_two {
  background: var(--ao3_accent);
}

.ao3_review_avatar_three {
  background: linear-gradient(135deg, #c20000, #6d0000);
}

.ao3_review_avatar_four {
  background: #7a3b00;
}

.ao3_review_avatar_five {
  background: #c2275a;
}

.ao3_review_avatar_six {
  background: #f4a340;
}

.ao3_review_user strong,
.ao3_review_user small {
  display: block;
}

.ao3_review_user strong {
  font-size: 12px;
}

.ao3_review_user small {
  margin-top: 2px;
  color: var(--ao3_muted);
  font-size: 9px;
}

/* ============================================================
   下载 CTA
   ============================================================ */
.ao3_download_section {
  padding: 74px 0;
  color: #ffffff;
  background:
    linear-gradient(120deg, rgba(255, 77, 77, 0.12), transparent 46%),
    linear-gradient(300deg, rgba(90, 0, 0, 0.3), transparent 38%),
    var(--ao3_dark);
}

.ao3_download_inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
}

.ao3_download_kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ao3_cyan);
  font-size: 10px;
  font-weight: 900;
}

.ao3_download_kicker::before {
  width: 24px;
  height: 3px;
  background: var(--ao3_gradient);
  content: "";
}

.ao3_download_inner h2 {
  margin: 11px 0 8px;
  font-size: 34px;
}

.ao3_download_inner p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 11px;
  line-height: 1.7;
}

.ao3_download_actions {
  display: flex;
  align-items: stretch;
  gap: 12px;
  flex-wrap: wrap;
}

.ao3_download_button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 60px;
  padding: 0 20px;
  border: 1px solid var(--ao3_lime);
  border-radius: 5px;
  color: var(--ao3_ink);
  background: var(--ao3_lime);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ao3_download_button:hover {
  transform: translate(2px, 2px);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.25);
}

.ao3_download_button i {
  font-size: 20px;
  font-style: normal;
}

.ao3_download_button span {
  display: flex;
  flex-direction: column;
  text-align: left;
  font-size: 13px;
  font-weight: 900;
  line-height: 1.3;
}

.ao3_download_button small {
  font-size: 9px;
  font-weight: 600;
  opacity: 0.72;
}

.ao3_qr {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 60px;
  min-height: 60px;
  padding: 8px;
  border: 1px dashed rgba(255, 255, 255, 0.45);
  border-radius: 5px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 9px;
  font-weight: 900;
  line-height: 1.6;
  text-align: center;
}

/* ============================================================
   页脚
   ============================================================ */
.ao3_footer {
  padding: 42px 0 30px;
  color: rgba(255, 255, 255, 0.74);
  background: #240608;
  font-size: 10px;
}

.ao3_footer_inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}

.ao3_footer_brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.ao3_footer_brand img {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
}

.ao3_footer_brand span {
  display: flex;
  flex-direction: column;
}

.ao3_footer_brand strong {
  color: #ffffff;
  font-size: 14px;
}

.ao3_footer_brand small {
  margin-top: 2px;
  font-size: 9px;
  opacity: 0.68;
}

.ao3_footer_nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.ao3_footer_nav a {
  color: rgba(255, 255, 255, 0.74);
  font-weight: 800;
}

.ao3_footer_nav a:hover {
  color: var(--ao3_cyan);
}

.ao3_footer_copyright {
  width: 100%;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.58);
  line-height: 1.9;
}

.ao3_footer_copyright p {
  margin: 0;
}

/* ============================================================
   下载弹窗
   ============================================================ */
.ao3_modal {
  position: fixed;
  z-index: 200;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(34, 0, 0, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.ao3_modal_card {
  position: relative;
  width: min(380px, 100%);
  padding: 34px 28px 28px;
  border: 1px solid var(--ao3_line);
  border-radius: 8px;
  background: var(--ao3_surface);
  text-align: center;
  box-shadow: 12px 12px 0 var(--ao3_lime);
}

.ao3_modal_close {
  position: absolute;
  top: 14px;
  right: 14px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--ao3_line);
  border-radius: 50%;
  color: var(--ao3_muted);
  background: var(--ao3_surface);
  font-size: 14px;
}

.ao3_modal_icon {
  display: grid;
  width: 62px;
  height: 62px;
  margin: 0 auto 18px;
  place-items: center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--ao3_gradient);
  font-size: 26px;
}

.ao3_modal_title {
  margin: 0 0 10px;
  font-size: 20px;
}

.ao3_modal_desc {
  margin: 0;
  color: var(--ao3_muted);
  font-size: 12px;
  line-height: 1.8;
}

.ao3_modal_button {
  width: 100%;
  height: 46px;
  margin-top: 24px;
  border: 0;
  border-radius: 4px;
  color: #ffffff;
  background: var(--ao3_accent);
  font-size: 13px;
  font-weight: 900;
  box-shadow: 5px 5px 0 var(--ao3_ink);
}

.ao3_body_lock {
  overflow: hidden;
}

/* ============================================================
   响应式：平板
   ============================================================ */
@media (max-width: 1020px) {
  .ao3_topbar_inner {
    grid-template-columns: 205px 1fr auto;
  }

  .ao3_nav {
    gap: 18px;
  }

  .ao3_archive_grid,
  .ao3_faq_grid {
    grid-template-columns: 1fr 300px;
    gap: 44px;
  }

  .ao3_hero_grid {
    gap: 34px;
  }
}

@media (max-width: 860px) {
  .ao3_hero_grid {
    grid-template-columns: 1fr;
    gap: 34px;
    padding: 64px 0 54px;
  }

  .ao3_hero_visual {
    min-height: 620px;
  }

  .ao3_phone {
    width: min(290px, 58%);
  }

  .ao3_phone_image {
    height: auto;
  }

  .ao3_archive_grid,
  .ao3_faq_grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .ao3_step_grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ao3_review_grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ============================================================
   响应式：手机（兼容微信内嵌 H5）
   ============================================================ */
@media (max-width: 700px) {
  .ao3_container {
    width: calc(100% - 28px);
  }

  .ao3_topbar {
    height: 64px;
  }

  .ao3_topbar_inner {
    grid-template-columns: 1fr auto;
  }

  .ao3_brand img {
    width: 40px;
    height: 40px;
  }

  .ao3_brand {
    font-size: 17px;
  }

  .ao3_brand_text small {
    font-size: 9px;
  }

  .ao3_nav {
    position: fixed;
    z-index: 99;
    top: 64px;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 12px 20px 18px;
    border-bottom: 3px solid var(--ao3_accent);
    background: var(--ao3_surface);
    box-shadow: 0 18px 30px rgba(60, 0, 0, 0.12);
  }

  .ao3_nav.ao3_nav_open,
  .ao3_nav.ao3_nav_open {
    display: flex;
  }

  .ao3_nav_link {
    padding: 12px 4px;
    border-bottom: 1px solid var(--ao3_line);
    font-size: 13px;
  }

  .ao3_top_actions {
    gap: 8px;
  }

  .ao3_top_button {
    min-height: 40px;
    padding: 0 14px;
    font-size: 11px;
  }

  .ao3_menu_button {
    display: grid;
    place-items: center;
  }

  .ao3_hero {
    padding-top: 12px;
  }

  .ao3_hero_grid {
    gap: 40px;
    padding: 52px 0 44px;
  }

  .ao3_hero h1 {
    font-size: 46px;
  }

  .ao3_hero h1 span {
    font-size: 20px;
  }

  .ao3_hero_desc {
    font-size: 13px;
  }

  .ao3_hero_buttons {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }

  .ao3_primary_button {
    width: 100%;
    justify-content: center;
  }

  .ao3_hero_stats {
    justify-content: space-between;
    gap: 10px;
  }

  .ao3_hero_visual {
    min-height: 0;
    display: flex;
    align-items: center;
    flex-direction: column;
    gap: 18px;
  }

  .ao3_phone {
    position: relative;
    right: auto;
    width: min(240px, 62%);
    margin: 0 auto;
  }

  .ao3_phone_image {
    height: auto;
  }

  .ao3_hero_panel {
    position: relative;
    bottom: auto;
    left: auto;
    align-self: stretch;
    width: 100%;
  }

  .ao3_section {
    padding: 64px 0 70px;
  }

  .ao3_section_head {
    grid-template-columns: 1fr;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 24px;
    padding-bottom: 18px;
  }

  .ao3_section_head > .ao3_section_kicker,
  .ao3_section_head h2,
  .ao3_section_head p {
    grid-column: 1;
  }

  .ao3_section_head h2,
  .ao3_section_head_center h2,
  .ao3_section_head_flat h2,
  .ao3_faq_side h2 {
    font-size: 28px;
  }

  /* 产品展示：手机端保持两列两排 */
  .ao3_product_grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px;
  }

  .ao3_product_frame img {
    height: auto;
  }

  .ao3_product_caption {
    grid-template-columns: 24px 1fr;
    gap: 6px;
    min-height: 56px;
    padding: 0 8px;
  }

  .ao3_product_caption span {
    display: none;
  }

  .ao3_archive_tabs {
    overflow-x: auto;
  }

  .ao3_archive_tab {
    flex: 0 0 auto;
    padding: 0 13px;
  }

  .ao3_archive_row {
    grid-template-columns: 40px 1fr 70px;
    gap: 8px;
    min-height: 82px;
    padding: 0 9px;
  }

  .ao3_archive_row > span {
    font-size: 8px;
  }

  .ao3_version_card {
    padding: 22px;
    box-shadow: 8px 8px 0 var(--ao3_lime);
  }

  .ao3_step_grid {
    gap: 9px;
  }

  .ao3_step_item {
    padding: 18px;
  }

  .ao3_faq_item summary {
    grid-template-columns: 40px 1fr 30px;
    padding: 0 12px;
  }

  .ao3_faq_item p {
    padding: 0 14px 20px 52px;
  }

  .ao3_review_grid {
    grid-template-columns: 1fr;
    gap: 9px;
  }

  .ao3_download_section {
    padding: 58px 0;
  }

  .ao3_download_inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 26px;
  }

  .ao3_download_inner h2 {
    font-size: 28px;
  }

  .ao3_download_actions {
    width: 100%;
  }

  .ao3_download_button {
    flex: 1 1 130px;
    justify-content: center;
  }

  .ao3_qr {
    width: 100%;
    min-height: 48px;
  }

  .ao3_footer_inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .ao3_footer_nav {
    gap: 10px 18px;
  }
}

@media (max-width: 390px) {
  .ao3_hero h1 {
    font-size: 42px;
  }

  .ao3_phone_image {
    height: auto;
  }

  .ao3_hero_panel {
    width: 100%;
  }

  .ao3_product_frame img {
    height: auto;
  }

  .ao3_step_grid {
    grid-template-columns: 1fr;
  }

  .ao3_archive_row {
    grid-template-columns: 36px 1fr 58px;
  }
}