* {
  box-sizing: border-box;
}

:root {
  --page-scale: 0.7;
}

html,
body {
  width: 100%;
  min-width: 826px;
  margin: 0;
  color: #fff;
  background: #050006;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

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

.topbar {
  position: relative;
  z-index: 10;
  height: calc(100px * var(--page-scale));
  background: #222;
  border-bottom: calc(8px * var(--page-scale)) solid #c20c0c;
}

.top-inner {
  width: 1560px;
  height: 92px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  transform: scale(var(--page-scale));
  transform-origin: top center;
}

.brand {
  width: 290px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}

.brand-mark {
  width: 46px;
  height: 46px;
  position: relative;
  display: inline-block;
  border-radius: 50%;
  background: #e60026;
}

.brand-mark::before,
.brand-mark::after,
.brand-mark span {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.brand-mark::before {
  inset: 10px;
  border: 4px solid #fff;
}

.brand-mark::after {
  left: 20px;
  top: 8px;
  width: 5px;
  height: 22px;
  background: #fff;
  transform: rotate(45deg);
  transform-origin: bottom center;
}

.brand-mark span {
  left: 17px;
  top: 17px;
  width: 12px;
  height: 12px;
  background: #e60026;
  border: 4px solid #fff;
}

.brand-text {
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0;
}

.main-nav {
  height: 92px;
  display: flex;
  align-items: stretch;
}

.main-nav a {
  min-width: 101px;
  padding: 0 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #d2d2d2;
  font-size: 18px;
  font-weight: 500;
  line-height: 92px;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: #fff;
  background: #050505;
}

.main-nav a.active {
  position: relative;
}

.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -8px;
  width: 0;
  height: 0;
  margin-left: -9px;
  border: 9px solid transparent;
  border-bottom: 0;
  border-top-color: #e00019;
}

.top-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 18px;
}

.search {
  width: 226px;
  height: 46px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  border-radius: 24px;
  background: #fff;
}

.search-icon {
  width: 16px;
  height: 16px;
  position: relative;
  display: inline-block;
  border: 3px solid #8d8d8d;
  border-radius: 50%;
}

.search-icon::after {
  content: "";
  position: absolute;
  right: -7px;
  bottom: -5px;
  width: 8px;
  height: 3px;
  border-radius: 2px;
  background: #8d8d8d;
  transform: rotate(45deg);
}

.search input {
  width: 170px;
  border: 0;
  outline: 0;
  color: #333;
  font-size: 16px;
  font-family: inherit;
  line-height: 20px;
}

.search input::placeholder {
  color: #777;
}

.creator {
  width: 127px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #5d5d5d;
  border-radius: 24px;
  color: #d5d5d5;
  font-size: 16px;
  font-weight: 500;
}

.login {
  color: #787878;
  font-size: 16px;
}

.download-page {
  min-height: calc(100vh - (100px * var(--page-scale)));
}

.hero {
  position: relative;
  min-height: calc(100vh - (100px * var(--page-scale)));
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 18%, rgba(234, 21, 23, 0.82) 0, rgba(166, 0, 13, 0.46) 22%, rgba(53, 3, 12, 0.66) 48%, rgba(6, 0, 7, 0.98) 82%),
    linear-gradient(105deg, #050006 0%, #1d0007 28%, #240008 70%, #050006 100%);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero::before {
  background:
    radial-gradient(ellipse at 50% 72%, rgba(160, 0, 14, 0.32), transparent 38%),
    linear-gradient(90deg, rgba(0, 0, 0, 0.82), transparent 20%, transparent 80%, rgba(0, 0, 0, 0.78));
}

.hero::after {
  opacity: 0.16;
  background:
    repeating-linear-gradient(110deg, transparent 0, transparent 78px, rgba(255, 255, 255, 0.045) 79px, transparent 138px),
    repeating-linear-gradient(0deg, transparent 0, transparent 4px, rgba(255, 255, 255, 0.025) 5px);
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 1180px;
  min-height: calc((100vh - (100px * var(--page-scale))) / var(--page-scale));
  margin: 0 auto;
  padding: 56px 0 62px;
  text-align: center;
  transform: scale(var(--page-scale));
  transform-origin: top center;
}

.hero h1 {
  margin: 0;
  font-size: 56px;
  line-height: 1.05;
  font-style: italic;
  font-weight: 700;
  letter-spacing: 0;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.22);
  white-space: nowrap;
}

.hero p {
  margin: 24px 0 70px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 24px;
  font-weight: 400;
  line-height: 1;
}

.laptop {
  position: relative;
  width: 936px;
  height: 548px;
  margin: 0 auto;
}

.screen {
  position: absolute;
  left: 75px;
  top: 0;
  width: 786px;
  height: 533px;
  padding: 18px 20px 36px;
  border: 4px solid #222832;
  border-radius: 24px 24px 10px 10px;
  background: linear-gradient(#0e1118, #1e222b);
  box-shadow:
    inset 0 0 0 2px rgba(255, 255, 255, 0.28),
    0 34px 70px rgba(0, 0, 0, 0.42);
}

.app-window {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: 8px;
  background: #f6f7fb;
  color: #273242;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.sidebar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 58px;
  width: 128px;
  padding: 26px 15px 0;
  background: #edf0f5;
}

.mini-logo {
  width: 74px;
  height: 11px;
  margin: 0 0 24px 8px;
  border-radius: 10px;
  background: linear-gradient(90deg, #ff3547 0 16px, #7d8797 16px);
}

.sidebar span,
.sidebar em {
  display: block;
  width: 84px;
  height: 10px;
  margin: 16px 0;
  border-radius: 6px;
  background: #a8b0be;
  opacity: 0.72;
}

.sidebar .nav-pill {
  width: 100%;
  height: 28px;
  margin: 0 0 15px;
  background: #ff3346;
  opacity: 1;
}

.sidebar em {
  width: 96px;
  height: 1px;
  margin: 26px 0;
  background: #d9dde5;
}

.app-main {
  position: absolute;
  left: 128px;
  right: 0;
  top: 0;
  bottom: 58px;
  padding: 22px 24px 0;
}

.app-toolbar {
  height: 30px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.app-toolbar span {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: #e9edf4;
}

.app-toolbar strong {
  width: 190px;
  height: 28px;
  border-radius: 7px;
  background: #f2ecfb;
}

.app-toolbar i {
  width: 26px;
  height: 26px;
  margin-left: auto;
  border-radius: 50%;
  background: #d8dce6;
}

.app-toolbar i + i {
  margin-left: 0;
}

.recommend-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 15px;
  height: 130px;
}

.song-card {
  position: relative;
  overflow: hidden;
  border-radius: 7px;
}

.song-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 55% 35%, rgba(255, 255, 255, 0.56), transparent 21%),
    linear-gradient(150deg, rgba(255, 255, 255, 0.16), rgba(0, 0, 0, 0.18));
}

.song-card b {
  position: absolute;
  z-index: 2;
  left: 12px;
  top: 10px;
  width: 62px;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0;
  text-align: left;
  word-break: keep-all;
  white-space: normal;
}

.blue {
  background: linear-gradient(145deg, #086dff, #0724a8);
}

.purple {
  background: linear-gradient(145deg, #6c48ff, #1a1691);
}

.cyan {
  background: linear-gradient(145deg, #69b2d5, #5f7d8c);
}

.red {
  background: linear-gradient(145deg, #d1161a, #6e1718);
}

.orange {
  background: linear-gradient(145deg, #cb6212, #682207);
}

.app-main h2 {
  margin: 24px 0 12px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  text-align: center;
}

.album-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}

.album {
  height: 74px;
  display: block;
  border-radius: 7px;
  background: #ddd;
}

.a1 {
  background: linear-gradient(145deg, #072d40, #89d8e5);
}

.a2 {
  background: linear-gradient(145deg, #65411e, #e1b078);
}

.a3 {
  background: linear-gradient(145deg, #1b1751, #5f75ff);
}

.a4 {
  background: linear-gradient(145deg, #1c2c60, #7fb3ff);
}

.a5 {
  background: linear-gradient(145deg, #ae8673, #f6d9c3);
}

.a6 {
  background: linear-gradient(145deg, #07070d, #888);
}

.banner-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.banner-row span {
  height: 62px;
  border-radius: 8px;
  background: linear-gradient(135deg, #7f120e, #1a0708);
}

.banner-row span:nth-child(2) {
  background: linear-gradient(135deg, #070707, #494949);
}

.banner-row span:nth-child(3) {
  background: linear-gradient(135deg, #5e4b35, #111);
}

.player {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 58px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 22px;
  background: #fff;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.08);
}

.cover {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #8e5bd0, #f3d0ff);
}

.track {
  width: 150px;
  height: 11px;
  border-radius: 8px;
  background: #cbd2de;
}

.ctrl {
  display: block;
  border-radius: 50%;
  background: #ff3346;
}

.ctrl.small {
  width: 16px;
  height: 16px;
  background: #9ba4b1;
}

.ctrl.play {
  width: 30px;
  height: 30px;
}

.progress {
  height: 3px;
  flex: 1;
  border-radius: 3px;
  background: linear-gradient(90deg, #ff3346 0 52%, #dfe3ea 52%);
}

.hinge {
  position: absolute;
  left: 425px;
  bottom: 0;
  width: 90px;
  height: 14px;
  border-radius: 0 0 16px 16px;
  background: linear-gradient(#242424, #0a0a0a);
}

.base {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 24px;
  border-radius: 0 0 50% 50% / 0 0 80% 80%;
  background: linear-gradient(#555, #151515 45%, #050505);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.55);
}

.download-actions {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 30px;
  margin-top: 94px;
}

.primary-wrap {
  width: 482px;
  text-align: left;
}

.download-primary,
.download-secondary {
  height: 98px;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  border-radius: 6px;
  font-size: 32px;
  font-weight: 700;
  line-height: 98px;
  letter-spacing: 0;
  white-space: nowrap;
}

.download-primary {
  width: 482px;
  position: relative;
  justify-content: center;
  padding-right: 54px;
  overflow: hidden;
  color: #253045;
  background: #f4f6fb;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.72);
}

.download-primary i {
  position: absolute;
  top: 0;
  right: 0;
  width: 54px;
  height: 98px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(207, 212, 222, 0.78);
}

.download-primary i::after {
  content: "";
  width: 0;
  height: 0;
  border: 12px solid transparent;
  border-top-color: #9aa2b1;
  transform: translateY(6px);
}

.down-icon {
  width: 40px;
  height: 40px;
  position: relative;
  flex: 0 0 auto;
  margin: 0 18px 0 0;
  border: 4px solid #253045;
  border-radius: 50%;
}

.down-icon::before,
.down-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  background: #253045;
  transform: translateX(-50%);
}

.down-icon::before {
  top: 8px;
  width: 5px;
  height: 18px;
}

.down-icon::after {
  top: 22px;
  width: 16px;
  height: 13px;
  clip-path: polygon(50% 100%, 0 25%, 35% 25%, 35% 0, 65% 0, 65% 25%, 100% 25%);
}

.help {
  display: block;
  width: 150px;
  margin: 18px auto 0;
  color: rgba(255, 255, 255, 0.56);
  font-size: 16px;
  font-weight: 600;
  line-height: 20px;
  text-align: center;
}

.download-secondary {
  width: 282px;
  color: rgba(255, 255, 255, 0.95);
  background: rgba(255, 255, 255, 0.13);
  justify-content: center;
  gap: 16px;
}

.download-secondary span {
  width: 28px;
  height: 28px;
  position: relative;
  flex: 0 0 auto;
  margin-right: 0;
  border: 3px solid #fff;
  border-radius: 50%;
}

.download-secondary span::before {
  content: "...";
  position: absolute;
  left: 50%;
  top: 50%;
  font-size: 18px;
  line-height: 1;
  letter-spacing: 0;
  transform: translate(-50%, -63%);
}

.corner-lock {
  position: absolute;
  right: 19px;
  bottom: -1px;
  z-index: 3;
  width: 68px;
  height: 28px;
  border: 0;
  border-radius: 12px 12px 0 0;
  background: rgba(255, 255, 255, 0.16);
}

.corner-lock::before {
  content: "";
  position: absolute;
  left: 29px;
  top: 7px;
  width: 10px;
  height: 8px;
  border: 3px solid rgba(255, 255, 255, 0.34);
  border-top: 0;
}

.corner-lock::after {
  content: "";
  position: absolute;
  left: 31px;
  top: 2px;
  width: 10px;
  height: 10px;
  border: 3px solid rgba(255, 255, 255, 0.34);
  border-bottom: 0;
  border-radius: 10px 10px 0 0;
}

.seo-summary {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

@media (max-height: 900px) {
  .hero-inner {
    padding-top: 44px;
  }

  .hero p {
    margin-bottom: 48px;
  }

  .laptop {
    transform: scale(0.86);
    transform-origin: top center;
    margin-bottom: -77px;
  }

  .download-actions {
    margin-top: 56px;
  }
}

.seo-body {
  min-width: 0;
  color: #202633;
  background: #f6f7fb;
}

.seo-header {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 7vw;
  background: #202020;
  color: #fff;
  border-bottom: 4px solid #d71920;
}

.seo-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
}

.seo-logo .brand-mark {
  width: 34px;
  height: 34px;
}

.seo-logo .brand-mark::before {
  inset: 8px;
  border-width: 3px;
}

.seo-logo .brand-mark::after {
  left: 15px;
  top: 6px;
  width: 4px;
  height: 16px;
}

.seo-logo .brand-mark span {
  left: 12px;
  top: 12px;
  width: 10px;
  height: 10px;
  border-width: 3px;
}

.seo-header nav {
  display: flex;
  gap: 28px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
}

.seo-header nav a:hover {
  color: #fff;
}

.seo-hero {
  min-height: 560px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 520px;
  gap: 64px;
  align-items: center;
  padding: 74px 7vw 82px;
  color: #fff;
  background:
    radial-gradient(circle at 68% 30%, rgba(226, 27, 39, 0.55), transparent 33%),
    linear-gradient(135deg, #190005 0%, #6b000c 48%, #120005 100%);
}

.seo-copy {
  max-width: 680px;
}

.eyebrow {
  margin: 0 0 14px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 16px;
  font-weight: 700;
}

.seo-copy h1 {
  margin: 0;
  font-size: 52px;
  line-height: 1.14;
  letter-spacing: 0;
}

.lead {
  max-width: 600px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 20px;
  line-height: 1.75;
}

.seo-actions {
  display: flex;
  gap: 16px;
  margin-top: 34px;
}

.seo-primary,
.seo-secondary {
  min-width: 178px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 700;
}

.seo-primary {
  color: #202633;
  background: #fff;
}

.seo-secondary {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.1);
}

.download-note {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.56);
  font-size: 14px;
}

.seo-preview {
  display: flex;
  justify-content: center;
}

.seo-window {
  width: 500px;
  height: 320px;
  display: grid;
  grid-template-columns: 105px 1fr;
  overflow: hidden;
  border: 12px solid #151923;
  border-radius: 18px;
  background: #f7f8fb;
  box-shadow: 0 34px 72px rgba(0, 0, 0, 0.36);
}

.seo-side {
  background:
    linear-gradient(#ff3346 0 28px, transparent 28px) 24px 45px / 66px 28px no-repeat,
    repeating-linear-gradient(#b9c0ce 0 8px, transparent 8px 21px) 24px 102px / 66px 84px no-repeat,
    #edf0f5;
}

.seo-grid {
  padding: 48px 22px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.seo-grid span,
.seo-grid i {
  display: block;
  border-radius: 8px;
  background: linear-gradient(145deg, #0b66ff, #071a83);
}

.seo-grid span:nth-child(2) {
  background: linear-gradient(145deg, #6d4dff, #151073);
}

.seo-grid span:nth-child(3) {
  background: linear-gradient(145deg, #75b5ca, #54727e);
}

.seo-grid span:nth-child(4) {
  background: linear-gradient(145deg, #d92228, #711010);
}

.seo-grid i {
  height: 66px;
  background: linear-gradient(145deg, #c9d0dc, #eef1f7);
}

.seo-section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 64px 24px;
}

.seo-section h2 {
  margin: 0 0 26px;
  color: #202633;
  font-size: 30px;
  line-height: 1.25;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-list article,
.seo-platforms,
.faq details {
  border: 1px solid #e1e4eb;
  border-radius: 8px;
  background: #fff;
}

.feature-list article {
  padding: 24px;
}

.feature-list h3 {
  margin: 0 0 12px;
  font-size: 20px;
}

.feature-list p,
.faq p,
.seo-platforms li {
  color: #5c6472;
  font-size: 16px;
  line-height: 1.7;
}

.feature-list p {
  margin: 0;
}

.seo-platforms ul {
  margin: 0;
  padding-left: 20px;
}

.seo-platforms a {
  color: #b31219;
  font-weight: 700;
}

.faq details {
  padding: 18px 22px;
  margin-bottom: 12px;
}

.faq summary {
  cursor: pointer;
  font-size: 18px;
  font-weight: 700;
}

.faq p {
  margin: 12px 0 0;
}

.seo-footer {
  padding: 28px 7vw;
  color: #6b7280;
  background: #fff;
  border-top: 1px solid #e1e4eb;
  font-size: 14px;
}

@media (max-width: 900px) {
  .seo-header {
    height: auto;
    gap: 18px;
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 24px;
  }

  .seo-header nav {
    flex-wrap: wrap;
    gap: 14px 20px;
  }

  .seo-hero {
    grid-template-columns: 1fr;
    padding: 54px 24px;
  }

  .seo-copy h1 {
    font-size: 38px;
  }

  .seo-preview {
    justify-content: flex-start;
    overflow: hidden;
  }

  .seo-window {
    transform: scale(0.72);
    transform-origin: left top;
    margin-bottom: -90px;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }
}