@charset "UTF-8";

:root {
  --bg: #07090b;
  --panel: #101419;
  --panel-soft: #151b20;
  --cyan: #09dbe9;
  --ink: #0a1014;
  --text: #e8f8fa;
  --muted: #9eafb8;
  --line: #2e3a41;
  --page-width: 1200px;
  --header-height: 76px;
  --shadow: 0 18px 34px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a,
button {
  -webkit-tap-highlight-color: transparent;
}

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

button {
  font: inherit;
}

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

h1,
h2,
h3,
p,
figure {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-width {
  width: min(calc(100% - 48px), var(--page-width));
  margin: 0 auto;
}

.icon {
  display: inline-flex;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
}

.icon::before {
  display: block;
  width: 100%;
  height: 100%;
  content: "";
  background: center / contain no-repeat;
}

.icon-download::before { background-image: url("../icons/download.svg"); }
.icon-menu::before { background-image: url("../icons/menu.svg"); }
.icon-arrow::before { background-image: url("../icons/arrow.svg"); }
.icon-user::before { background-image: url("../icons/user.svg"); }
.icon-chat::before { background-image: url("../icons/chat.svg"); }
.icon-book::before { background-image: url("../icons/book.svg"); }
.icon-edit::before { background-image: url("../icons/edit.svg"); }
.icon-chevron::before { background-image: url("../icons/chevron.svg"); }
.icon-globe::before { background-image: url("../icons/globe.svg"); }

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: rgba(7, 9, 11, 0.98);
  transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
}

.header-shell {
  display: flex;
  height: 100%;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--text);
  font-size: 18px;
  font-weight: 800;
  white-space: nowrap;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 5px;
  object-fit: cover;
}

.main-navigation {
  margin: 0 auto;
}

.main-navigation ul {
  display: flex;
  gap: 30px;
}

.main-navigation a {
  position: relative;
  display: block;
  padding: 26px 0 24px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.main-navigation a:hover,
.main-navigation a:focus-visible,
.main-navigation a.is-active {
  color: var(--cyan);
}

.main-navigation a.is-active::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  content: "";
  background: var(--cyan);
}

.header-download,
.primary-download,
.download-panel a,
.card-action {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--cyan);
  border-radius: 5px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  transition: transform 180ms ease, background-color 180ms ease;
}

.header-download {
  min-width: 126px;
}

.header-download:hover,
.header-download:focus-visible,
.primary-download:hover,
.primary-download:focus-visible,
.download-panel a:hover,
.download-panel a:focus-visible,
.card-action:hover,
.card-action:focus-visible {
  background: #bffcff;
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--cyan);
  border-radius: 5px;
  background: var(--panel);
}

main {
  padding-top: var(--header-height);
}

main section {
  scroll-margin-top: calc(var(--header-height) + 18px);
}

.section-kicker {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
}

.section-kicker::before {
  width: 26px;
  height: 2px;
  content: "";
  background: var(--cyan);
}

.hero {
  display: grid;
  min-height: 650px;
  grid-template-columns: minmax(0, .9fr) minmax(420px, 1.1fr);
  gap: 42px;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  padding: 52px 0;
}

.hero h1 {
  margin-top: 14px;
  font-size: clamp(52px, 6vw, 82px);
  line-height: 1;
  letter-spacing: -.06em;
}

.hero-description {
  margin-top: 20px;
  overflow: hidden;
  color: var(--text);
  font-size: 19px;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.primary-download {
  min-width: 180px;
  margin-top: 28px;
}

.update-time {
  display: block;
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
}

.hero-media {
  position: relative;
  display: flex;
  min-height: 550px;
  align-items: center;
  justify-content: flex-end;
  padding-right: 30px;
}

.phone-frame,
.creator-preview {
  width: min(100%, 280px);
  padding: 10px;
  border: 9px solid #1a2228;
  border-radius: 5px;
  background: #1a2228;
  box-shadow: var(--shadow);
}

.phone-frame img,
.creator-preview img {
  width: 100%;
  height: auto;
}

.recommend-card {
  position: absolute;
  z-index: 2;
  bottom: 65px;
  left: 105px;
  width: min(100%, 300px);
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.recommend-heading,
.recommend-body,
.recommend-tags {
  display: flex;
  align-items: center;
}

.recommend-heading {
  justify-content: space-between;
  color: var(--text);
  font-size: 14px;
  font-weight: 800;
}

.recommend-heading a { color: var(--cyan); font-size: 12px; }
.recommend-body { gap: 10px; margin-top: 14px; }
.recommend-body .icon { width: 32px; height: 32px; padding: 6px; border-radius: 5px; background: #172c31; }
.recommend-body strong { display: block; font-size: 14px; }
.recommend-body p { margin-top: 2px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.recommend-tags { gap: 7px; margin-top: 13px; }
.recommend-tags span { padding: 3px 7px; border: 1px solid var(--line); border-radius: 5px; color: var(--cyan); font-size: 12px; }
.card-action { width: 100%; min-height: 38px; margin-top: 14px; font-size: 13px; }

.interaction-section,
.screens-section,
.creator-section,
.faq-section,
.reviews-section { padding: 92px 0; }
.interaction-section,
.faq-section { background: #0a0e11; }
.screens-section { background: #101419; }
.creator-section { background: var(--panel); }
.reviews-section { background: #0b1013; }

.section-heading h2 { margin-top: 10px; font-size: clamp(30px, 3.6vw, 48px); line-height: 1.18; letter-spacing: -.04em; }
.section-heading > span { display: block; margin-top: 7px; color: var(--muted); font-size: 13px; }

.signal-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 42px;
}

.signal-grid article {
  position: relative;
  min-height: 200px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel);
}

.signal-grid b { display: inline-flex; width: 30px; height: 30px; align-items: center; justify-content: center; border-radius: 5px; background: var(--cyan); color: var(--ink); font-size: 14px; }
.signal-grid .icon { position: absolute; top: 25px; right: 25px; width: 27px; height: 27px; }
.signal-grid h3 { margin-top: 28px; font-size: 19px; }
.signal-grid p { margin-top: 8px; color: var(--muted); font-size: 13px; }

.split-heading { display: flex; gap: 30px; align-items: end; justify-content: space-between; }
.split-heading > span { max-width: 360px; color: var(--muted); font-size: 13px; }
.screen-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-top: 42px; }
.screen-image { overflow: hidden; border: 1px solid var(--line); border-radius: 5px; background: #000; }
.screen-image img { width: 100%; height: auto; }
.screen-grid figcaption { display: grid; gap: 3px; padding: 13px 2px 0; }
.screen-grid strong { font-size: 14px; }
.screen-grid figcaption span { color: var(--muted); font-size: 12px; }

.creator-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr); gap: 72px; align-items: center; }
.setting-list { display: grid; gap: 0; margin-top: 30px; border-top: 1px solid var(--line); }
.setting-list li { display: grid; grid-template-columns: 34px 1fr; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.setting-list .icon { width: 23px; height: 23px; }
.setting-list strong,.setting-list span { display: block; }
.setting-list strong { font-size: 16px; }
.setting-list span { margin-top: 3px; color: var(--muted); font-size: 13px; }
.creator-preview { justify-self: end; }

.centered-heading { text-align: center; }
.centered-heading .section-kicker { justify-content: center; }
.faq-list { width: min(100%, 850px); margin: 40px auto 0; }
.faq-item { overflow: hidden; margin-top: 10px; border: 1px solid var(--line); border-radius: 5px; background: var(--panel); }
.faq-item button,.official-panel > button { display: flex; width: 100%; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 18px; border: 0; background: transparent; color: var(--text); font-size: 14px; font-weight: 800; text-align: left; }
.faq-item button .icon,.official-panel > button > .icon { width: 16px; height: 16px; transition: transform 180ms ease; }
.faq-item button[aria-expanded="true"] .icon,.official-panel > button[aria-expanded="true"] > .icon { transform: rotate(180deg); }
.faq-item > div { padding: 0 18px 16px; }
.faq-item p { color: var(--muted); font-size: 13px; }
.official-section { padding: 0 0 92px; background: #0a0e11; }
.official-panel { overflow: hidden; border: 1px solid var(--cyan); border-radius: 5px; background: var(--panel); }
.official-panel > button span { display: inline-flex; gap: 10px; align-items: center; }
.official-panel > button span .icon { width: 18px; height: 18px; }
.official-panel > div { padding: 0 18px 18px; }
.official-panel a { color: var(--cyan); font-size: 14px; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }

.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 42px; }
.review-card { display: flex; min-height: 255px; flex-direction: column; padding: 22px; border: 1px solid var(--line); border-radius: 5px; background: var(--panel); }
.review-number { display: inline-flex; width: 28px; height: 26px; align-items: center; justify-content: center; border-radius: 5px; background: #17373c; color: var(--cyan); font-size: 12px; font-weight: 800; }
.review-card > p { margin-top: 16px; color: #d5e5e8; font-size: 13px; line-height: 1.8; }
.review-card footer { display: flex; gap: 8px; align-items: center; margin-top: auto; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.avatar { display: inline-flex; width: 24px; height: 24px; align-items: center; justify-content: center; border-radius: 5px; background: var(--cyan); color: var(--ink); font-size: 12px; }
.review-card time { margin-left: auto; }

.download-section { padding: 70px 0; background: #0c171b; }
.download-panel { display: flex; gap: 30px; align-items: center; justify-content: space-between; padding: 34px 42px; border: 1px solid var(--cyan); border-radius: 5px; background: var(--cyan); color: var(--ink); }
.download-panel .section-kicker { color: var(--ink); }
.download-panel .section-kicker::before { background: var(--ink); }
.download-panel h2 { margin-top: 8px; font-size: clamp(24px, 3vw, 36px); line-height: 1.2; }
.download-panel a { min-width: 170px; flex: 0 0 auto; border-color: var(--ink); background: var(--ink); color: var(--cyan); }
.download-panel a:hover,.download-panel a:focus-visible { background: #25353b; }

.site-footer { padding: 42px 24px 18px; background: #050708; }
.footer-layout { display: grid; grid-template-columns: minmax(280px, 1.5fr) repeat(2, minmax(130px, .6fr)); gap: 38px; }
.footer-brand { display: flex; gap: 13px; align-items: center; }
.footer-brand img { width: 48px; height: 48px; border-radius: 5px; object-fit: cover; }
.footer-brand strong { display: block; font-size: 18px; }
.footer-brand p,.footer-nav a,.copyright { color: var(--muted); font-size: 12px; }
.footer-brand p { margin-top: 3px; }
.footer-nav > p { font-size: 14px; font-weight: 800; }
.footer-nav ul { display: grid; gap: 7px; margin-top: 10px; }
.footer-nav a:hover,.footer-nav a:focus-visible { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }
.copyright { width: min(calc(100% - 48px), var(--page-width)); margin: 32px auto 0; padding-top: 16px; border-top: 1px solid var(--line); text-align: center; }

@media (max-width: 720px) {
  :root { --header-height: 64px; }
  .page-width { width: min(calc(100% - 28px), var(--page-width)); }
  .header-shell { gap: 10px; }
  .brand { gap: 7px; font-size: 15px; }
  .brand img { width: 32px; height: 32px; }
  .header-download { order: 2; min-width: 94px; min-height: 38px; margin-left: auto; padding: 0 9px; font-size: 12px; }
  .header-download .icon { display: none; }
  .menu-toggle { display: inline-flex; order: 3; }
  .main-navigation { position: absolute; top: calc(100% + 8px); right: 0; left: 0; display: none; margin: 0; padding: 12px 14px; border: 1px solid var(--line); border-radius: 5px; background: var(--panel); box-shadow: var(--shadow); }
  .main-navigation.is-open { display: block; }
  .main-navigation ul { display: grid; gap: 0; }
  .main-navigation a { padding: 10px 6px; font-size: 14px; }
  .main-navigation a.is-active::after { top: 7px; right: auto; bottom: 7px; left: 0; width: 2px; height: auto; }
  .hero { min-height: 0; grid-template-columns: 1fr; gap: 12px; }
  .hero-copy { padding: 60px 0 0; text-align: center; }
  .hero h1 { margin-top: 10px; font-size: 48px; }
  .hero-description { margin-top: 12px; font-size: 14px; }
  .primary-download { margin-top: 22px; }
  .hero-media { min-height: 540px; justify-content: flex-end; padding-right: 0; }
  .phone-frame { width: min(76%, 280px); }
  .recommend-card { bottom: 82px; left: 0; width: min(80%, 290px); }
  .interaction-section,.screens-section,.creator-section,.faq-section,.reviews-section { padding: 68px 0; }
  .official-section { padding: 0 0 68px; }
  .section-heading h2 { font-size: 32px; }
  .signal-grid,.review-grid { grid-template-columns: 1fr; margin-top: 30px; }
  .signal-grid article,.review-card { min-height: 0; }
  .split-heading { display: block; }
  .split-heading > span { display: block; margin-top: 12px; }
  .screen-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 10px; margin-top: 30px; }
  .creator-layout { grid-template-columns: 1fr; gap: 32px; }
  .creator-preview { width: min(100%, 250px); justify-self: center; margin: 0 auto; }
  .faq-list { margin-top: 28px; }
  .faq-item button,.official-panel > button { padding: 15px 14px; font-size: 13px; }
  .download-section { padding: 52px 0; }
  .download-panel { display: grid; justify-items: center; padding: 30px 18px; text-align: center; }
  .download-panel a { width: min(100%, 210px); }
  .footer-layout { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; justify-items: center; text-align: center; }
  .footer-brand { grid-column: 1 / -1; flex-direction: column; }
  .footer-nav ul { justify-items: center; }
}