:root {
  --container: 1200px;
  --hero-a: #e96b49;
  --hero-b: #ff5659;
  --text: #2f2f2f;
  --body: #666666;
  --muted: #8b8b8b;
  --soft-gray: #f5f5f5;
  --soft-pink: #fff2f2;
  --red: #ff5659;
  --accent: #F84848;
  --shadow: 0 18px 42px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  padding-top: 115px;
  color: var(--text);
  background: #ffffff;
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.container {
  width: min(calc(100% - 12px), var(--container));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: #ffffff;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.nav-wrap {
  height: 115px;
  display: flex;
  align-items: center;
}

.nav-wrap a:first-child {
  margin-right: 50px;
}

.nav-wrap img {
  width: 160px;
  height: auto;
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
}

.brand-mark,
.mini-mark {
  width: 20px;
  height: 20px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.brand-mark i,
.mini-mark i {
  display: block;
  border-radius: 3px;
  background: linear-gradient(135deg, #ff7b59, #d83d49);
}

.brand-text { font-size: 18px; }

.site-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 50px;
  font-size: 18px;
  letter-spacing: 0;
  color: rgba(0, 0, 0, 0.8);
  flex: 1;
}

.site-nav a {
  color: rgba(0, 0, 0, 0.8);
}

.site-nav a.active {
  color: #000000;
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--accent);
  transition: color 0.3s ease;
}

.footer-links a:hover { color: #000000; }

.mobile-menu-btn {
  display: none;
}

.nav-cta {
  height: 55px;
  min-width: 143px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 0, 0, 0.14);
  border-radius: 999px;
  font-size: 18px;
  font-weight: 500;
  color: #6f6f6f;
  transition: all 0.3s ease;
}

.nav-cta:hover,
.nav-cta:focus {
  border-color: var(--accent);
  color: var(--accent);
}

.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #D46A39 0%, #F84848 100%);
  color: #fff;
  isolation: isolate;
}

.hero::after {
  content: '';
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: -120px;
  height: 240px;
  background: #fff;
  transform: rotate(-5deg);
}

.hero-decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-lines {
  display: none;
}

.hero-arc {
  display: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  min-height: 520px;
  padding: 34px 0 100px;
  background: url('../images/decorative-lines-background.png') center top / cover no-repeat;
  display: grid;
  grid-template-columns: 480px 1fr;
  align-items: center;
  gap: 30px;
}

.hero-logo-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 12px;
}

.hero h1 {
  margin: 0;
  font-size: 64px;
  line-height: 1.04;
}

.hero-subtitle {
  margin: 30px 0 30px;
  font-size: 20px;
  line-height: 32px;
  color: rgba(255, 255, 255);
}

.hero-desc {
  margin-bottom: 50px;
  font-size: 20x;
  line-height: 32px;
  color: rgba(255, 255, 255);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
}

.btn-primary {
  width: 198px;
  height: 54px;
  border-radius: 6px;
  opacity: 1;

  /* 自动布局 */
  display: flex;
  flex-direction: row;
  align-items: center;
  color: #000;
  font-size: 16px;
  justify-content: center;
  gap: 8px;
  background: #FFFFFF;
  transition: all 0.3s ease;
}

.btn-primary:hover,
.btn-primary:focus {
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(248, 72, 72, 0.3);
}

.btn-icon {
  width: 16px;
  height: 16px;
  object-fit: contain;
}

.hero-meta {
  margin-top: 20px;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.82);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual img {
  width: 520px;
  filter: drop-shadow(0 28px 45px rgba(0, 0, 0, 0.22));
}

.section-intro {
  padding: 54px 0 20px;
  background: #fff;
}

.title-block,
.download-header {
  text-align: center;
}

.title-block h2{
  font-size: 64px;
  font-weight: 800;
  color: #313131;
  margin:0;
}

.download-header h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.2;
}

.title-block p{
  font-size: 24px;
  font-weight: 800;
  color: #313131;
  margin: 0;
}

.download-header p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.title-left {
  text-align: left;
}

.feature-section {
  padding: 80px 0 80PX;
}

.section-white {
  background: #fff;
}

.section-gray {
  background: var(--soft-gray);
}

.feature-stage {
  position: relative;
  aspect-ratio: 1180 / 610;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100% 100%;
}

.feature-stage-feed {
  padding: 80px 0 80px;
  background-color: #fff;
  background-image: url('../images/following-feed-screen.png');
}

.feature-stage-users {
  background-color: var(--soft-gray);
  background-image: url('../images/featured-users-screen.png');
}

.feature-stage-community {
  padding: 80px 0 80px;
  background-color: #fff;
  background-image: url('../images/community-detail-screen.png');
}

.feature-copy {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 450px;
  max-width: 44%;
}

.copy-right {
  right: 0px;
}

.copy-left {
  left: 76px;
}

.feature-copy h3 {
  margin: 0 0 28px;
  font-size: 36px;
  line-height: 1.25;
  color: var(--text);
}

.feature-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  margin-top: 5px;
  padding-left: 22px;
  font-size: 18px;
  line-height: 1.9;
  color: var(--body);
}

.feature-list li:first-child {
  margin-top: 0;
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 15px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #1f1f1f;
}

.avatar-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 15px;
}

.avatar-row img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: block;
  object-fit: cover;
}

.community-copy {
  width: 640px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.tag-row img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.08);
}

.voices-section {
  padding: 80px 0 80px;
  background: var(--soft-pink);
}

.compact-title {
  margin-bottom: 28px;
}

.voice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.voice-card {
  min-height: 118px;
  padding: 30px 40px 30px 34px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.voice-card p {
  margin: 0 0 30px;
  font-size: 16px;
  line-height: 1.8;
  color: #666;
}

.voice-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.voice-meta img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex: 0 0 40px;
}

.voice-author {
  min-width: 0;
}

.voice-meta strong {
  display: block;
  font-size: 16px;
  color: #333;
}

.voice-meta span {
  color: #999;
  font-size: 12px;
}

.download-section {
  background: #ffffff;
}

.download-shell {
  position: relative;
  aspect-ratio: 1180 / 460;
  background-repeat: no-repeat;
  background-position: right top;
  background-size: 100% 70%;
  background-image: url('../images/welcome-screen.png');

}

.download-header {
  width: 520px;
  padding-top: 130px;
  padding-left: 50px;
}

.download-header h2 {
  font-size: 60px;
  font-weight: 600;
  color: #313131;
  letter-spacing: 0;
}

.download-header p {
  margin-top: 14px;
  font-size: 17px;
  letter-spacing: 0;
  color: #313131;
}

.download-layout {
  padding-left: 50px;
  margin-top: 30px;
}

.download-info {
  position: relative;
  z-index: 2;
}

.download-card {
  width: 420px;
  max-width: 420px;
  margin: 0;
  background: #ffffff;
  border: 1px solid #ebebeb;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
}

.download-card-inner {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  padding: 30px 30px 10px 30px;
  align-items: center;
  justify-items: start;
}

.download-qr-wrap {
  text-align: center;
  display: block;
}

.download-qr {
  width: 139px;
  height: 139px;
  margin: 0 auto 8px;
  border: 1px dashed #dcdcdc;
  padding: 6px;
  background: #fff;
}

.download-qr-wrap span {
  display: block;
  font-size: 12px;
  color: #7d7d7d;
}

.download-side-actions {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-top: 6px;
}

.download-os-btn {
  height: 40px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  width: 164px;
  font-weight: 600;
  color: #fff;
}

.download-os-icon {
  width: 16px;
  height: 16px;
  object-fit: contain;
}

.download-os-btn.android {
  background: #ff5757;
}

.download-os-btn.apple {
  background: #222222;
}

.download-os-btn:hover,
.download-os-btn:focus {
  transform: scale(1.05);
  opacity: 0.9;
  transition: all 0.3s ease;
}

.download-card-foot {
  margin: 0 30px 25px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 12px;
  color: #808080;
  border-top:1px solid #eee;
  padding-top: 10px;
}

.appstore-inline-icon {
  width: 80px;
  height: auto;
  object-fit: contain;
}

.download-visual {
  min-height: 44px;
}

.contact-banner {
  position: relative;
  min-height: 196px;
  padding: 33px 125px 59px 125px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-radius: 8px;
  background: #ff4d4f;
  color: #fff;
  overflow: hidden;
}

.contact-banner::after {
  content: '';
  position: absolute;
  right: 18px;
  bottom: -146px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 80px solid rgba(255, 255, 255, 0.12);
}

.contact-copy {
  position: relative;
  z-index: 1;
  max-width: 620px;
}

.contact-banner strong {
  display: block;
  margin-bottom: 14px;
  font-size: 36px;
  line-height: 1.2;
}

.contact-banner p {
  margin: 4px 0 0;
  font-size: 16px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.92);
}
.contact-copy p:nth-child(3) {
  margin-top: 10px;
}

.contact-qr-wrap {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.contact-banner img {
  width: 120px;
  height: 120px;
  background: #fff;
  padding: 4px;
}

.qr-tip {
  font-size: 12px;
  color: #666666;
  background: #ffffff;
  padding: 6px 12px;
  border-radius: 4px;
  width: 120px;
  text-align: center;
  box-sizing: border-box;
}

.site-footer {
  padding: 50px 0 50px;
  margin-top: 80px;
  border-top: 1px solid #dddddd;
  background: #F6F6F6;
}

.footer-bottom {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.footer-company {
  color: #9b9b9b;
}

.footer-agreements {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 17px;
  color: #313131;
}

.footer-agreements a {
  transition: color 0.3s ease;
}

.footer-agreements a:hover,
.footer-agreements a:focus {
  color: var(--accent);
}

.footer-company p {
  margin: 0 0 8px;
}

.company-name {
  font-size: 17px;
  color: #999;
}

.company-en,
.company-address {
  font-size: 14px;
  color: #999;
}

.footer-qr-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: #9E9E9E;
  font-size: 12px;
}

.footer-links {
  border-top: 1px solid #eeeeee;
  padding-top: 20px;
  margin-top: 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links .links-title {
  color: #666666;
  font-size: 14px;
}

.footer-links a {
  color: #666666;
  font-size: 14px;
}

.footer-qr-box img {
  width: 120px;
  height: 120px;
}



.company-footer{
  background: #333333;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 80px;
  font-size: 14px;
  color: #999999;
  
}

.company-footer span{
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: #999999;
  margin-left: 10px;
  margin-right: 10px;
}
.hero-copy{
  padding-left: 80px;
  padding-top: 0px;
}

@media screen and (max-width: 768px) {
  :root {
    --container: 100%;
  }

  body {
    padding-top: 70px;
  }

  .site-header {
    height: 70px;
  }

  .nav-wrap {
    height: 70px;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .nav-wrap a:first-child {
    margin-right: 0;
  }

  .nav-wrap img {
    width: 120px;
    height: auto;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px;
    gap: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  .site-nav.active {
    display: flex;
  }

  .site-nav a {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: 6px;
  }

  .site-nav a:hover,
  .site-nav a:focus {
    background: var(--soft-gray);
  }

  .nav-cta {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
    width: 44px;
    height: 44px;
    border: none;
    background: none;
    cursor: pointer;
    position: relative;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
  }

  .mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: #333;
    border-radius: 1px;
    transition: all 0.3s ease;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .container {
    width: calc(100% - 12px);
    padding: 0 16px;
  }

  .hero {
    background: linear-gradient(180deg, #D46A39 0%, #F84848 100%);
  }

  .hero-inner {
    grid-template-columns: 1fr;
    padding: 20px 0 60px;
    min-height: auto;
    gap: 20px;
  }

  .hero-copy {
    padding-left: 16px;
    padding-top: 20px;
    text-align: center;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-subtitle {
    font-size: 16px;
    line-height: 24px;
    margin: 16px 0;
  }

  .hero-desc {
    font-size: 14px;
    line-height: 22px;
    margin-bottom: 24px;
  }

  .hero-actions {
    justify-content: center;
  }

  .btn-primary {
    width: 100%;
    max-width: 280px;
    height: 48px;
    font-size: 16px;
  }

  .hero-visual img {
    width: 100%;
    max-width: 320px;
    filter: none;
  }

  .section-intro {
    padding: 30px 0 10px;
  }

  .title-block h2 {
    font-size: 32px;
  }

  .title-block p {
    font-size: 16px;
  }

  .feature-section {
    padding: 40px 0;
  }

  .feature-stage {
    aspect-ratio: auto;
    min-height: 200px;
    background-size: cover;
  }

  .feature-stage-feed,
  .feature-stage-community {
    padding: 30px 0;
  }

  .feature-copy {
    position: static;
    transform: none;
    width: 100%;
    max-width: 100%;
    padding: 20px 16px;
    background: rgba(255, 255, 255, 0.9);
  }

  .copy-right,
  .copy-left {
    left: auto;
    right: auto;
  }

  .feature-copy h3 {
    font-size: 24px;
    margin-bottom: 16px;
  }

  .feature-list li {
    font-size: 14px;
    line-height: 1.6;
    padding-left: 16px;
  }

  .feature-list li::before {
    width: 5px;
    height: 5px;
    top: 10px;
  }

  .community-copy {
    width: 100%;
  }

  .voices-section {
    padding: 40px 0;
  }

  .voice-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .voice-card {
    padding: 20px;
  }

  .voice-card p {
    font-size: 14px;
    margin-bottom: 20px;
  }

  .download-section {
    padding: 20px 0;
  }

  .download-shell {
    background: none;
  }

  .download-header {
    width: 100%;
    padding-top: 20px;
    padding-left: 0;
    text-align: center;
  }

  .download-header h2 {
    font-size: 32px;
  }

  .download-header p {
    font-size: 14px;
  }

  .download-layout {
    padding-left: 0;
    margin-top: 20px;
    display: flex;
    justify-content: center;
  }

  .download-card {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
  }

  .download-card-inner {
    grid-template-columns: 1fr;
    gap: 20px;
    text-align: center;
    padding: 20px 16px 10px;
    justify-items: center;
  }

  .download-qr-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .download-qr {
    width: 150px;
    height: 150px;
  }

  .download-side-actions {
    flex-direction: row;
    justify-content: center;
    gap: 12px;
    width: 100%;
  }

  .download-os-btn {
    width: calc(50% - 6px);
    max-width: 140px;
  }

  .contact-banner {
    flex-direction: column;
    padding: 24px 16px;
    text-align: center;
  }

  .contact-banner strong {
    font-size: 24px;
  }

  .contact-banner p {
    font-size: 14px;
  }

  .site-footer {
    padding: 30px 0;
    margin-top: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer-agreements {
    justify-content: center;
    font-size: 14px;
    flex-wrap: wrap;
  }

  .company-name {
    font-size: 14px;
  }

  .company-en,
  .company-address {
    font-size: 12px;
  }

  .footer-qr-box img {
    width: 100px;
    height: 100px;
  }

  .company-footer {
    flex-direction: column;
    height: auto;
    padding: 16px;
    gap: 8px;
  }

  .company-footer span {
    display: none;
  }

  .avatar-row {
    justify-content: center;
  }

  .tag-row {
    justify-content: center;
  }
}

@media screen and (max-width: 480px) {
  .hero h1 {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 14px;
  }

  .title-block h2 {
    font-size: 28px;
  }

  .feature-copy h3 {
    font-size: 20px;
  }

  .download-header h2 {
    font-size: 28px;
  }
}