:root {
  --ink: #111417;
  --ink-soft: #252b2f;
  --paper: #f5f7f3;
  --white: #ffffff;
  --mint: #35e6c8;
  --mint-dark: #0e987f;
  --coral: #ff5c6c;
  --coral-soft: #fff0f1;
  --violet: #5865d8;
  --line: #d9ded9;
  --muted: #60686d;
  --shadow: 0 18px 50px rgba(17, 20, 23, 0.12);
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

.container {
  width: min(var(--content), calc(100% - 40px));
  margin: 0 auto;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 9px 14px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  color: var(--white);
  background: rgba(17, 20, 23, 0.96);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  gap: 34px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  font-size: 18px;
  font-weight: 800;
  line-height: 1;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.site-nav a:not(.btn) {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  color: #d7dcde;
  font-size: 15px;
}

.site-nav a[aria-current="page"],
.site-nav a:not(.btn):hover {
  color: var(--mint);
}

.menu-toggle {
  width: 44px;
  height: 44px;
  display: none;
  place-items: center;
  margin-left: auto;
  color: var(--white);
  background: transparent;
  border: 1px solid #4a5054;
  border-radius: 6px;
  cursor: pointer;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  width: 20px;
  height: 2px;
  display: block;
  position: relative;
  background: currentColor;
}

.menu-toggle span::before,
.menu-toggle span::after {
  position: absolute;
  left: 0;
  content: "";
}

.menu-toggle span::before {
  top: -6px;
}

.menu-toggle span::after {
  top: 6px;
}

.btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 24px;
  color: var(--ink);
  background: var(--mint);
  border: 1px solid var(--mint);
  border-radius: 6px;
  font-weight: 800;
  box-shadow: 0 8px 0 rgba(53, 230, 200, 0.18);
  transition: transform 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.btn:hover {
  background: #63efd8;
  transform: translateY(-2px);
  box-shadow: 0 11px 0 rgba(53, 230, 200, 0.15);
}

.btn:focus-visible,
.text-link:focus-visible,
.site-nav a:focus-visible,
.faq-question:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 3px;
}

.btn-small {
  min-height: 42px;
  padding: 0 18px;
  box-shadow: none;
  font-size: 14px;
}

.btn-dark {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
  box-shadow: 0 8px 0 rgba(17, 20, 23, 0.17);
}

.btn-dark:hover {
  background: var(--ink-soft);
}

.btn-coral {
  color: var(--white);
  background: var(--coral);
  border-color: var(--coral);
  box-shadow: 0 8px 0 rgba(255, 92, 108, 0.17);
}

.btn-coral:hover {
  background: #ff7784;
}

.hero {
  min-height: 690px;
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
}

.hero::before {
  width: 42%;
  height: 100%;
  position: absolute;
  right: 0;
  top: 0;
  content: "";
  /*background: var(--mint);*/
}

.hero::after {
  width: 220px;
  height: 220px;
  position: absolute;
  left: -80px;
  bottom: -100px;
  content: "";
  border: 36px solid var(--coral);
  transform: rotate(12deg);
}

.hero-inner {
  min-height: 690px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.75fr);
  align-items: center;
  gap: 70px;
  position: relative;
  z-index: 1;
}

.hero-copy {
  max-width: 680px;
  padding: 82px 0 118px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--mint);
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
}

.eyebrow-dark {
  color: var(--mint-dark);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.25;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 650px;
  margin-bottom: 24px;
  font-size: clamp(42px, 6vw, 76px);
  font-weight: 900;
}

.hero-lead {
  max-width: 620px;
  margin-bottom: 30px;
  color: #d2d8da;
  font-size: 19px;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.release-note {
  margin: 0;
  color: #aab2b6;
  font-size: 14px;
}

.hero-visual {
  min-height: 610px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: relative;
}

.hero-visual .app-shot {
  width: min(330px, 90%);
  max-width: 400px;
  height: auto;
  position: relative;
  filter: drop-shadow(0 34px 35px rgba(17, 20, 23, 0.34));
  transform: rotate(3deg);
}

.signal-strip {
  position: relative;
  z-index: 3;
  margin-top: 58px;
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  color: var(--white);
  background: var(--ink-soft);
  border: 1px solid #3a4145;
  box-shadow: var(--shadow);
}

.signal-item {
  min-height: 116px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 22px 28px;
  border-right: 1px solid #3a4145;
}

.signal-item:last-child {
  border-right: 0;
}

.signal-item strong {
  color: var(--mint);
  font-size: 23px;
}

.signal-item span {
  color: #b8c0c3;
  font-size: 14px;
}

.section {
  padding: 54px 0;
}

.section-compact {
  padding: 76px 0;
}

.section-dark {
  color: var(--white);
  background: var(--ink);
}

.section-white {
  background: var(--white);
}

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

.section-heading {
  max-width: 720px;
  margin-bottom: 46px;
}

.section-heading h2 {
  margin-bottom: 0;
  font-size: clamp(31px, 4vw, 48px);
}

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

.feature-card {
  min-height: 285px;
  position: relative;
  padding: 30px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-card:nth-child(2) {
  background: var(--mint);
  border-color: var(--mint);
}

.feature-card:nth-child(5) {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
}

.feature-num {
  display: block;
  margin-bottom: 48px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 900;
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 23px;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.feature-card:nth-child(2) p {
  color: #26443e;
}

.feature-card:nth-child(5) p {
  color: #c3c9cc;
}

.showcase-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 44px;
}

.showcase-head h2 {
  margin-bottom: 0;
  font-size: clamp(31px, 4vw, 48px);
}

.showcase-controls {
  display: inline-flex;
  gap: 8px;
}

.icon-btn {
  width: 46px;
  height: 46px;
  display: inline-grid;
  place-items: center;
  color: var(--white);
  background: transparent;
  border: 1px solid #52595d;
  border-radius: 6px;
  cursor: pointer;
  font-size: 24px;
}

.icon-btn:hover {
  color: var(--ink);
  background: var(--mint);
  border-color: var(--mint);
}

.shot-track {
  display: grid;
  grid-template-columns: repeat(3, minmax(250px, 1fr));
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--mint) var(--ink-soft);
  padding-bottom: 18px;
}

.shot-item {
  min-width: 0;
  scroll-snap-align: start;
}

.shot-frame {
  min-height: 540px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
  background: var(--ink-soft);
  border: 1px solid #3b4246;
  border-radius: 8px;
}

.shot-frame .app-shot {
  width: min(286px, 88%);
  max-width: 400px;
  height: auto;
  margin-bottom: -126px;
  filter: drop-shadow(0 22px 24px rgba(0, 0, 0, 0.34));
}

.shot-item h3 {
  margin: 19px 0 5px;
  font-size: 20px;
}

.shot-item p {
  margin: 0;
  color: #abb3b6;
  font-size: 14px;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.path-card {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 36px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.path-card-dark {
  color: var(--white);
  background: var(--ink);
  border-color: var(--ink);
}

.path-card-accent {
  background: var(--mint);
  border-color: var(--mint);
}

.path-card h3 {
  max-width: 430px;
  margin-bottom: 14px;
  font-size: 28px;
}

.path-card p {
  max-width: 520px;
  margin-bottom: 35px;
  color: var(--muted);
}

.path-card-dark p {
  color: #bcc3c6;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--mint-dark);
  font-weight: 800;
}

.path-card-dark .text-link {
  color: var(--mint);
}

.path-card-accent .text-link {
  color: var(--ink);
}

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

.review {
  margin: 0;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.review-stars {
  margin-bottom: 16px;
  color: var(--coral);
  font-size: 18px;
  letter-spacing: 2px;
}

.review blockquote {
  margin: 0 0 23px;
  font-size: 17px;
}

.review figcaption {
  color: var(--muted);
  font-size: 14px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-question {
  width: 100%;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  text-align: left;
}

.faq-question::after {
  flex: 0 0 auto;
  content: "+";
  color: var(--coral);
  font-size: 27px;
  font-weight: 400;
}

.faq-question[aria-expanded="true"]::after {
  content: "−";
}

.faq-answer {
  display: none;
  max-width: 900px;
  padding: 0 46px 24px 0;
  color: var(--muted);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-answer.is-open {
  display: block;
}

.cta-band {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--coral);
}

.cta-band::after {
  width: 220px;
  height: 220px;
  position: absolute;
  right: -50px;
  top: -140px;
  content: "";
  border: 32px solid var(--ink);
  transform: rotate(18deg);
}

.cta-inner {
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.cta-inner h2 {
  max-width: 670px;
  margin-bottom: 10px;
  font-size: clamp(30px, 4vw, 49px);
}

.cta-inner p {
  margin-bottom: 0;
  color: #fff1f2;
}

.site-footer {
  padding: 56px 0 30px;
  color: #bec5c8;
  background: #090b0c;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  gap: 48px;
  padding-bottom: 42px;
}

.site-footer .brand {
  margin-bottom: 20px;
  color: var(--white);
}

.footer-copy {
  max-width: 440px;
  margin-bottom: 0;
  font-size: 14px;
}

.footer-nav strong,
.footer-note strong {
  display: block;
  margin-bottom: 14px;
  color: var(--white);
}

.footer-nav a {
  display: block;
  width: fit-content;
  margin: 7px 0;
  color: #bec5c8;
}

.footer-nav a:hover {
  color: var(--mint);
}

.footer-note p {
  margin-bottom: 0;
  font-size: 13px;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid #262b2e;
  color: #7f888c;
  font-size: 13px;
}

/* Inner pages */
.page-hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
}

.page-hero::before {
  width: 170px;
  height: 170px;
  position: absolute;
  right: 7vw;
  top: 50%;
  content: "";
  background: var(--mint);
  transform: translateY(-50%) rotate(18deg);
}

.page-hero-coral::before {
  background: var(--coral);
}

.page-hero-inner {
  min-height: 440px;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 1;
}

.page-hero-copy {
  max-width: 820px;
  padding: 70px 0;
}

.breadcrumbs {
  margin-bottom: 26px;
  color: #aeb6b9;
  font-size: 14px;
}

.breadcrumbs a {
  color: var(--mint);
}

.page-hero h1 {
  margin-bottom: 22px;
  font-size: clamp(38px, 6vw, 68px);
}

.page-hero-lead {
  max-width: 720px;
  margin-bottom: 0;
  color: #ccd2d4;
  font-size: 18px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 285px;
  align-items: start;
  gap: 64px;
}

.article-content h2 {
  margin: 70px 0 18px;
  font-size: 34px;
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content h3 {
  margin: 28px 0 10px;
  font-size: 22px;
}

.article-content p,
.article-content li {
  color: #3e464a;
}

.article-content a {
  color: #087b68;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-content .btn {
  color: var(--ink);
  text-decoration: none;
}

.step-list {
  display: grid;
  gap: 18px;
  margin: 30px 0;
}

.step {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 20px;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.step-index {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  color: var(--ink);
  background: var(--mint);
  border-radius: 6px;
  font-size: 22px;
  font-weight: 900;
}

.step h3 {
  margin: 0 0 8px;
}

.step p {
  margin-bottom: 0;
}

.notice {
  margin: 28px 0;
  padding: 24px 26px;
  background: var(--coral-soft);
  border-left: 5px solid var(--coral);
}

.notice strong {
  display: block;
  margin-bottom: 7px;
}

.notice p {
  margin-bottom: 0;
}

.check-list {
  margin: 20px 0 30px;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  margin: 12px 0;
  padding-left: 32px;
}

.check-list li::before {
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  position: absolute;
  left: 0;
  top: 4px;
  content: "✓";
  color: var(--ink);
  background: var(--mint);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 900;
}

.article-aside {
  position: sticky;
  top: 96px;
}

.aside-box {
  padding: 25px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.aside-box + .aside-box {
  margin-top: 18px;
}

.aside-box strong {
  display: block;
  margin-bottom: 12px;
  font-size: 18px;
}

.aside-box a:not(.btn) {
  display: block;
  margin: 8px 0;
  color: var(--muted);
  font-size: 14px;
}

.aside-box .btn {
  width: 100%;
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin: 26px 0 38px;
}

.diagnostic-card {
  padding: 25px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.diagnostic-card h3 {
  margin-top: 0;
}

.diagnostic-card p:last-child {
  margin-bottom: 0;
}

.tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  color: var(--ink);
  background: var(--mint);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 800;
}

@media (max-width: 980px) {
  .site-nav {
    width: 100%;
    max-height: 0;
    display: block;
    overflow: hidden;
    position: fixed;
    left: 0;
    top: 72px;
    color: var(--white);
    background: var(--ink);
    transition: max-height 240ms ease;
  }

  .site-nav.is-open {
    max-height: calc(100vh - 72px);
    padding: 12px 20px 24px;
    border-top: 1px solid #33393d;
  }

  .site-nav a:not(.btn),
  .site-nav .btn {
    width: 100%;
    margin: 3px 0;
  }

  .menu-toggle {
    display: grid;
  }

  .hero::before {
    width: 34%;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 20px;
  }

  .feature-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .shot-track {
    grid-template-columns: repeat(3, minmax(300px, 62vw));
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-aside {
    position: static;
  }

  .article-aside {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .aside-box + .aside-box {
    margin-top: 0;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--content));
  }

  .hero,
  .hero-inner {
    min-height: 720px;
    height: 720px;
  }

  .hero::before {
    width: 100%;
    height: 230px;
    top: auto;
    bottom: 0;
  }

  .hero-inner {
    display: block;
  }

  .hero-copy {
    min-width: 0;
    padding: 52px 0 10px;
  }

  .hero h1 {
    font-size: 45px;
  }

  .hero-visual {
    width: 100%;
    height: 240px;
    min-height: 0;
    position: absolute;
    right: 0;
    bottom: 0;
    display: block;
  }

  .hero-visual .app-shot {
    width: 210px;
    position: absolute;
    right: 6%;
    bottom: -180px;
  }

  .signal-strip {
    margin-top: 0;
  }

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

  .signal-item {
    border-bottom: 1px solid #3a4145;
  }

  .signal-item:nth-child(2) {
    border-right: 0;
  }

  .signal-item:nth-child(3),
  .signal-item:nth-child(4) {
    border-bottom: 0;
  }

  .section {
    padding: 76px 0;
  }

  .feature-grid,
  .path-grid,
  .reviews-grid,
  .diagnostic-grid,
  .footer-grid,
  .article-aside {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: auto;
  }

  .feature-num {
    margin-bottom: 30px;
  }

  .showcase-head,
  .cta-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .showcase-head {
    display: flex;
  }

  .shot-track {
    grid-template-columns: repeat(3, minmax(265px, 82vw));
  }

  .shot-frame {
    min-height: 480px;
  }

  .cta-inner {
    min-height: 330px;
    justify-content: center;
  }

  .page-hero::before {
    width: 90px;
    height: 90px;
    right: -25px;
    top: 20%;
  }

  .page-hero-inner {
    min-height: 390px;
  }

  .page-hero-copy {
    width: 100%;
    min-width: 0;
  }

  .hero h1,
  .page-hero h1,
  .hero-lead,
  .page-hero-lead {
    overflow-wrap: anywhere;
  }

  .article-content h2 {
    font-size: 29px;
  }

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

  .aside-box + .aside-box {
    margin-top: 0;
  }
}

@media (max-width: 440px) {
  .brand {
    font-size: 16px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .hero h1 {
    font-size: 39px;
  }

  .hero-visual .app-shot {
    width: 190px;
    bottom: -170px;
  }

  .hero-lead {
    font-size: 17px;
  }

  .hero-actions .btn,
  .cta-actions .btn {
    width: 100%;
  }

  .release-note {
    width: 100%;
  }

  .signal-item {
    padding: 18px;
  }

  .signal-item strong {
    font-size: 19px;
  }

  .path-card {
    padding: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}