:root {
  color-scheme: light;
  --bg: #f7fbfc;
  --surface: #ffffff;
  --surface-strong: #eef9fb;
  --surface-warm: #fff8e7;
  --surface-coral: #fff0ed;
  --ink: #14313a;
  --muted: #5d737a;
  --line: rgba(20, 49, 58, 0.13);
  --brand: #13adc1;
  --brand-strong: #078da2;
  --coral: #ff7d68;
  --sun: #ffc857;
  --leaf: #6abf69;
  --shadow: 0 18px 48px rgba(12, 63, 74, 0.13);
  --radius: 8px;
  --container: 1180px;
  --header-height: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 22px);
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(25, 183, 200, 0.1), transparent 420px),
    linear-gradient(90deg, rgba(255, 200, 87, 0.06) 0, transparent 34%),
    var(--bg);
  line-height: 1.75;
  letter-spacing: 0;
}

body.menu-open {
  overflow: hidden;
}

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

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

strong {
  font-weight: 800;
}

.text-key,
.text-step,
.text-version,
.text-num {
  font-weight: 900;
}

.text-key {
  color: var(--brand-strong);
}

.text-step {
  color: #163f4a;
}

.text-version {
  color: var(--coral);
}

.text-num {
  color: #d17c00;
}

p {
  margin: 0;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: 0;
}

ul {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: 6px;
  background: var(--ink);
  color: #fff;
  transition: transform 0.2s ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--header-height);
  background: rgba(247, 251, 252, 0.9);
  border-bottom: 1px solid rgba(20, 49, 58, 0.1);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  width: min(100% - 40px, var(--container));
  min-height: var(--header-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--ink);
  transition: color 0.2s ease, transform 0.2s ease;
}

.brand img,
.footer-brand img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 8px 20px rgba(19, 173, 193, 0.22);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.brand:hover,
.brand:focus-visible,
.footer-brand:hover,
.footer-brand:focus-visible {
  color: var(--brand-strong);
  transform: translateY(-1px);
  outline: none;
}

.brand:hover img,
.brand:focus-visible img,
.footer-brand:hover img,
.footer-brand:focus-visible img {
  transform: rotate(-4deg) scale(1.06);
  box-shadow: 0 12px 26px rgba(19, 173, 193, 0.32);
}

.brand span,
.footer-brand span {
  white-space: nowrap;
}

.site-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-menu a {
  padding: 8px 12px;
  border-radius: 999px;
  color: #28474f;
  font-size: 15px;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.site-menu a:hover,
.site-menu a:focus-visible,
.site-menu a.is-active {
  color: var(--brand-strong);
  background: rgba(19, 173, 193, 0.11);
  transform: translateY(-1px);
  outline: none;
}

.site-menu .nav-download {
  margin-left: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  box-shadow: 0 10px 20px rgba(7, 141, 162, 0.18);
}

.site-menu .nav-download:hover,
.site-menu .nav-download:focus-visible {
  color: #fff;
  background: linear-gradient(135deg, var(--brand-strong), #087b90);
  box-shadow: 0 14px 26px rgba(7, 141, 162, 0.28);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 9px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.section {
  padding: 84px 0;
}

.section-soft,
.section-band {
  background:
    linear-gradient(135deg, rgba(255, 248, 231, 0.92), rgba(238, 249, 251, 0.94)),
    repeating-linear-gradient(135deg, rgba(19, 173, 193, 0.04) 0 1px, transparent 1px 18px);
}

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  padding: 76px 0 44px;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(247, 251, 252, 0.97) 0%, rgba(247, 251, 252, 0.86) 47%, rgba(247, 251, 252, 0.24) 100%),
    url("img/tu4.jpg") center / cover no-repeat;
  opacity: 0.82;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(19, 173, 193, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, rgba(19, 173, 193, 0.06) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(90deg, #000, transparent 72%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 120px;
  background: linear-gradient(180deg, transparent, var(--bg));
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.9fr);
  align-items: center;
  gap: 48px;
}

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--brand-strong);
  font-size: 14px;
  font-weight: 800;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--brand), var(--sun));
}

.hero h1 {
  font-size: clamp(38px, 6.5vw, 72px);
  font-weight: 900;
  color: var(--brand-strong);
  text-shadow: 0 8px 24px rgba(255, 255, 255, 0.76);
}

.hero-lead {
  max-width: 640px;
  margin-top: 22px;
  color: #254b55;
  font-size: clamp(18px, 2.3vw, 23px);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 800;
  line-height: 1.2;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-3px);
  outline: none;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  box-shadow: 0 14px 28px rgba(7, 141, 162, 0.24);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 18px 34px rgba(7, 141, 162, 0.32);
}

.btn-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  border-color: rgba(20, 49, 58, 0.18);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: rgba(19, 173, 193, 0.45);
  box-shadow: 0 12px 24px rgba(12, 63, 74, 0.12);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 660px;
  margin: 34px 0 0;
}

.hero-meta div {
  min-width: 0;
  padding: 14px 16px;
  border: 1px solid rgba(20, 49, 58, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.hero-meta div:hover {
  transform: translateY(-3px);
  border-color: rgba(19, 173, 193, 0.34);
  box-shadow: 0 12px 26px rgba(12, 63, 74, 0.09);
}

.hero-meta dt {
  margin-bottom: 4px;
  color: var(--brand-strong);
  font-size: 13px;
  font-weight: 800;
}

.hero-meta dd {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.45;
}

.hero-media,
.image-panel,
.media-strip figure,
.split-guide figure {
  margin: 0;
}

.hero-media {
  position: relative;
  padding: 12px;
  border: 1px solid rgba(19, 173, 193, 0.25);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(238, 249, 251, 0.82));
  box-shadow: 0 24px 70px rgba(7, 80, 94, 0.18);
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.hero-media:hover {
  transform: translateY(-5px);
  border-color: rgba(19, 173, 193, 0.42);
  box-shadow: 0 30px 80px rgba(7, 80, 94, 0.24);
}

.game-window::before {
  content: "";
  position: absolute;
  inset: -10px;
  z-index: -1;
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(19, 173, 193, 0.32), rgba(255, 200, 87, 0.2), rgba(255, 125, 104, 0.2));
  filter: blur(18px);
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 0 10px 10px;
  color: rgba(20, 49, 58, 0.58);
  font-size: 12px;
  font-weight: 800;
}

.window-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.window-bar span:nth-child(1) {
  background: var(--coral);
}

.window-bar span:nth-child(2) {
  background: var(--sun);
}

.window-bar span:nth-child(3) {
  background: var(--brand);
}

.window-bar b {
  margin-left: auto;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.hero-media img,
.image-panel img,
.media-strip img,
.split-guide img {
  width: 100%;
  object-fit: cover;
  border-radius: 6px;
  background: #d8eef2;
  transition: transform 0.35s ease, filter 0.35s ease;
}

.hero-media:hover img,
.image-panel:hover img,
.media-strip figure:hover img,
.split-guide figure:hover img {
  transform: scale(1.025);
  filter: saturate(1.06);
}

.hero-media img {
  aspect-ratio: 637 / 358;
  border: 1px solid rgba(20, 49, 58, 0.12);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.hero-tags span {
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--brand-strong);
  background: rgba(19, 173, 193, 0.1);
  font-size: 13px;
  font-weight: 900;
}

.quick-nav {
  position: relative;
  z-index: 2;
  margin-top: -24px;
  padding-bottom: 24px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.quick-grid a,
.feature-card,
.guide-block,
.update-item,
.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(12, 63, 74, 0.07);
}

.quick-grid a {
  position: relative;
  display: block;
  padding: 18px;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.quick-grid a::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--brand), var(--sun));
}

.quick-grid a:hover,
.quick-grid a:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(19, 173, 193, 0.42);
  box-shadow: 0 16px 34px rgba(12, 63, 74, 0.1);
  outline: none;
}

.quick-grid a:hover::before,
.quick-grid a:focus-visible::before {
  width: 7px;
}

.quick-grid strong {
  display: block;
  margin-bottom: 6px;
  font-size: 18px;
}

.quick-grid span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.86fr);
  align-items: center;
  gap: 54px;
}

.section-copy h2,
.section-head h2,
.cta-inner h2 {
  font-size: clamp(26px, 3.4vw, 40px);
  color: var(--brand-strong);
}

.section-copy p:not(.eyebrow),
.section-head p:not(.eyebrow),
.guide-block p,
.cta-inner p {
  color: var(--muted);
}

.section-copy p:not(.eyebrow) {
  margin-top: 18px;
  font-size: 17px;
}

.image-panel {
  padding: 10px;
  border-radius: 8px;
  background:
    linear-gradient(180deg, #fff, var(--surface-strong));
  box-shadow: var(--shadow);
  border: 1px solid rgba(19, 173, 193, 0.14);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.image-panel:hover {
  transform: translateY(-4px);
  border-color: rgba(19, 173, 193, 0.32);
  box-shadow: 0 24px 58px rgba(12, 63, 74, 0.16);
}

.image-panel img {
  aspect-ratio: 16 / 9;
}

.section-head {
  max-width: 790px;
  margin: 0 auto 36px;
  text-align: center;
}

.section-head.align-left {
  margin-left: 0;
  text-align: left;
}

.section-head p:not(.eyebrow) {
  margin-top: 16px;
  font-size: 17px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  position: relative;
  min-height: 240px;
  padding: 26px;
  overflow: hidden;
  border-top: 4px solid rgba(19, 173, 193, 0.5);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.feature-card::after {
  content: "";
  position: absolute;
  right: -32px;
  bottom: -32px;
  width: 100px;
  height: 100px;
  border-radius: 999px;
  background: rgba(19, 173, 193, 0.08);
  transition: transform 0.28s ease, background 0.28s ease;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: auto 22px 20px auto;
  width: 42px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 200, 87, 0.7);
  transition: width 0.25s ease, background 0.25s ease;
}

.feature-card:hover,
.feature-card:focus-within {
  transform: translateY(-6px);
  border-color: rgba(19, 173, 193, 0.32);
  box-shadow: 0 20px 46px rgba(12, 63, 74, 0.12);
}

.feature-card:hover::after {
  transform: scale(1.18);
  background: rgba(19, 173, 193, 0.13);
}

.feature-card:hover::before {
  width: 68px;
  background: rgba(255, 125, 104, 0.72);
}

.feature-card:hover .card-index {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
}

.feature-card-large {
  grid-column: span 2;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(238, 249, 251, 0.96)),
    url("img/tu5.jpg") right bottom / 46% auto no-repeat;
}

.feature-card:nth-child(2) {
  background: linear-gradient(180deg, #fff, var(--surface-warm));
  border-top-color: rgba(255, 200, 87, 0.9);
}

.feature-card:nth-child(3) {
  background: linear-gradient(180deg, #fff, var(--surface-strong));
}

.feature-card:nth-child(4) {
  background: linear-gradient(180deg, #fff, var(--surface-coral));
  border-top-color: rgba(255, 125, 104, 0.82);
}

.feature-card:nth-child(5) {
  background: linear-gradient(180deg, #fff, rgba(238, 249, 251, 0.72));
}

.feature-card:nth-child(6) {
  background: linear-gradient(180deg, #fff, rgba(255, 248, 231, 0.88));
  border-top-color: rgba(106, 191, 105, 0.72);
}

.system-label {
  position: absolute;
  top: 24px;
  right: 24px;
  color: rgba(20, 49, 58, 0.3);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.card-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 32px;
  margin-bottom: 18px;
  border-radius: 999px;
  color: var(--brand-strong);
  background: rgba(19, 173, 193, 0.12);
  font-weight: 900;
}

.feature-card h3,
.guide-block h3,
.update-item h3 {
  font-size: 22px;
  color: #153641;
}

.feature-card p {
  margin-top: 12px;
  color: var(--muted);
}

.media-strip {
  display: grid;
  grid-template-columns: 1fr 1fr 1.2fr;
  gap: 14px;
  margin-top: 28px;
}

.media-strip figure {
  padding: 8px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 12px 30px rgba(12, 63, 74, 0.06);
  overflow: hidden;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.media-strip figure:hover {
  transform: translateY(-5px);
  border-color: rgba(19, 173, 193, 0.35);
  box-shadow: 0 18px 38px rgba(12, 63, 74, 0.12);
}

.media-strip img {
  aspect-ratio: 16 / 9;
}

.guide-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.toc {
  position: sticky;
  top: calc(var(--header-height) + 18px);
  display: grid;
  gap: 8px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(238, 249, 251, 0.86));
  box-shadow: 0 14px 36px rgba(12, 63, 74, 0.08);
}

.toc strong {
  margin-bottom: 4px;
  color: var(--brand-strong);
}

.toc a {
  padding: 8px 10px;
  border-radius: 6px;
  color: #31535b;
  font-size: 15px;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.toc a:hover,
.toc a:focus-visible,
.toc a.is-active {
  color: var(--brand-strong);
  background: rgba(19, 173, 193, 0.1);
  transform: translateX(3px);
  outline: none;
}

.guide-main {
  display: grid;
  gap: 22px;
}

.guide-block {
  position: relative;
  padding: 28px;
  overflow: hidden;
  border-left: 4px solid rgba(19, 173, 193, 0.5);
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.guide-block::after {
  content: "";
  position: absolute;
  right: -44px;
  top: -44px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: rgba(255, 200, 87, 0.1);
  pointer-events: none;
  transition: transform 0.28s ease, background 0.28s ease;
}

.guide-block:hover {
  transform: translateY(-4px);
  border-left-color: var(--brand);
  box-shadow: 0 18px 42px rgba(12, 63, 74, 0.12);
}

.guide-block:hover::after {
  transform: scale(1.18);
  background: rgba(255, 200, 87, 0.16);
}

.guide-dashboard {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.guide-dashboard div {
  padding: 16px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(19, 173, 193, 0.12), rgba(255, 255, 255, 0.95));
  border: 1px solid rgba(19, 173, 193, 0.18);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.guide-dashboard div:hover {
  transform: translateY(-4px);
  border-color: rgba(19, 173, 193, 0.38);
  box-shadow: 0 14px 28px rgba(12, 63, 74, 0.1);
}

.guide-dashboard span,
.guide-dashboard strong {
  display: block;
}

.guide-dashboard span {
  color: var(--muted);
  font-size: 13px;
}

.guide-dashboard strong {
  margin-top: 5px;
  color: var(--brand-strong);
  font-size: 18px;
  line-height: 1.35;
}

.guide-block h3 {
  margin-bottom: 18px;
}

.steps {
  display: grid;
  gap: 14px;
}

.steps div {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 12px;
  border-radius: 8px;
  background: rgba(238, 249, 251, 0.62);
  transition: transform 0.2s ease, background 0.2s ease;
}

.steps div:hover {
  transform: translateX(4px);
  background: rgba(238, 249, 251, 0.95);
}

.steps span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: #fff;
  background: var(--brand);
  font-weight: 900;
}

.timeline {
  position: relative;
  display: grid;
  gap: 16px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 86px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand), var(--sun), var(--coral));
}

.timeline div {
  position: relative;
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  gap: 18px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.timeline div:hover {
  transform: translateX(4px);
  background: #fff;
  box-shadow: 0 10px 24px rgba(12, 63, 74, 0.08);
}

.timeline time {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 76px;
  min-height: 32px;
  border-radius: 999px;
  color: var(--brand-strong);
  background: #e5f8fb;
  font-weight: 900;
}

.split-guide {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: center;
}

.split-guide img {
  aspect-ratio: 16 / 9;
}

.check-list {
  display: grid;
  gap: 10px;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--muted);
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background:
    linear-gradient(135deg, var(--brand), var(--leaf));
  box-shadow: inset 0 0 0 4px #fff;
}

.tip-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.tip-grid div {
  padding: 16px;
  border-radius: 8px;
  background:
    linear-gradient(180deg, var(--surface-strong), #fff);
  border: 1px solid rgba(19, 173, 193, 0.12);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.tip-grid div:hover {
  transform: translateY(-4px);
  border-color: rgba(19, 173, 193, 0.34);
  box-shadow: 0 14px 28px rgba(12, 63, 74, 0.1);
}

.tip-grid strong,
.tip-grid span {
  display: block;
}

.tip-grid strong {
  color: var(--brand-strong);
}

.tip-grid span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.update-list {
  position: relative;
  display: grid;
  gap: 14px;
}

.update-timeline {
  padding-left: 24px;
}

.update-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--coral), var(--sun), var(--brand));
}

.update-item {
  position: relative;
  padding: 22px 24px 22px 152px;
  min-height: 110px;
  border-left: 0;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.update-item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 32px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 5px rgba(255, 125, 104, 0.14);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.update-item:hover {
  transform: translateX(4px);
  border-color: rgba(255, 125, 104, 0.28);
  box-shadow: 0 18px 38px rgba(12, 63, 74, 0.11);
}

.update-item:hover::before {
  transform: scale(1.2);
  box-shadow: 0 0 0 7px rgba(255, 125, 104, 0.18);
}

.update-item time {
  position: absolute;
  top: 24px;
  left: 24px;
  padding: 7px 10px;
  border-radius: 999px;
  color: #9a4a00;
  background: rgba(255, 200, 87, 0.2);
  font-weight: 900;
  font-size: 14px;
}

.update-item h3 {
  margin-bottom: 8px;
}

.update-item p {
  color: var(--muted);
}

.faq-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.42fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list details {
  padding: 0;
  overflow: hidden;
  border-left: 4px solid rgba(19, 173, 193, 0.36);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.faq-list details:hover,
.faq-list details[open] {
  transform: translateY(-2px);
  border-left-color: var(--brand);
  box-shadow: 0 14px 30px rgba(12, 63, 74, 0.1);
}

.faq-list summary {
  position: relative;
  min-height: 58px;
  padding: 17px 56px 17px 20px;
  cursor: pointer;
  font-weight: 800;
  color: #173942;
  list-style: none;
  transition: color 0.2s ease, background 0.2s ease;
}

.faq-list summary:hover,
.faq-list details[open] summary {
  color: var(--brand-strong);
  background: rgba(19, 173, 193, 0.06);
}

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

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--brand-strong);
  font-size: 24px;
  line-height: 1;
}

.faq-list details[open] summary::after {
  content: "-";
}

.faq-list p {
  padding: 0 20px 18px;
  color: var(--muted);
}

.cta-band {
  padding: 58px 0;
  background:
    linear-gradient(135deg, rgba(19, 173, 193, 0.94), rgba(255, 125, 104, 0.9)),
    url("img/cover.jpg") center / cover no-repeat;
  color: #fff;
}

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

.cta-inner .eyebrow {
  color: #fff;
}

.cta-inner .eyebrow::before {
  background: rgba(255, 255, 255, 0.86);
}

.cta-inner h2,
.cta-inner p {
  color: #fff;
}

.cta-inner p {
  max-width: 760px;
  margin-top: 12px;
  opacity: 0.93;
}

.cta-inner .btn-primary {
  flex: 0 0 auto;
  color: var(--brand-strong);
  background: #fff;
  box-shadow: 0 16px 34px rgba(10, 74, 86, 0.18);
}

.site-footer {
  padding: 42px 0 22px;
  background: #102f39;
  color: rgba(255, 255, 255, 0.82);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(180px, 0.6fr) minmax(260px, 0.8fr);
  gap: 34px;
}

.footer-brand {
  color: #fff;
  margin-bottom: 12px;
}

.footer-grid strong {
  display: block;
  margin-bottom: 12px;
  color: #fff;
}

.footer-grid a:not(.footer-brand) {
  display: block;
  margin: 8px 0;
  color: rgba(255, 255, 255, 0.76);
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-grid a:not(.footer-brand):hover,
.footer-grid a:not(.footer-brand):focus-visible {
  color: #fff;
  transform: translateX(3px);
  outline: none;
}

.footer-grid p {
  max-width: 560px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-media.reveal,
.image-panel.reveal {
  transition: opacity 0.5s ease, transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.feature-card.reveal,
.guide-block.reveal,
.update-item.reveal {
  transition: opacity 0.5s ease, transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1024px) {
  .hero-grid,
  .two-col,
  .guide-layout,
  .faq-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-copy {
    max-width: none;
  }

  .hero-media {
    max-width: 720px;
  }

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

  .feature-card-large {
    grid-column: span 2;
  }

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

  .toc {
    position: static;
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .toc strong {
    grid-column: 1 / -1;
  }

  .media-strip {
    grid-template-columns: 1fr;
  }

  .split-guide {
    grid-template-columns: 1fr;
  }

}

@media (max-width: 760px) {
  :root {
    --header-height: 64px;
  }

  .container,
  .nav-wrap {
    width: min(100% - 28px, var(--container));
  }

  .nav-toggle {
    display: block;
  }

  .site-menu {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    display: grid;
    gap: 4px;
    padding: 14px;
    border-bottom: 1px solid var(--line);
    background: rgba(247, 251, 252, 0.98);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .site-menu.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-menu a {
    padding: 12px 14px;
    border-radius: 8px;
    background: #fff;
  }

  .site-menu .nav-download {
    margin-left: 0;
    justify-content: center;
    text-align: center;
  }

  .brand img,
  .footer-brand img {
    width: 38px;
    height: 38px;
  }

  .hero {
    padding: 52px 0 34px;
  }

  .hero-bg {
    background:
      linear-gradient(180deg, rgba(247, 251, 252, 0.96) 0%, rgba(247, 251, 252, 0.83) 58%, rgba(247, 251, 252, 0.5) 100%),
      url("img/cover.jpg") center / cover no-repeat;
  }

  .hero-grid {
    gap: 28px;
  }

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

  .hero-lead {
    font-size: 18px;
  }

  .hero-meta {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .quick-grid,
  .feature-grid,
  .guide-dashboard,
  .tip-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-card-large {
    grid-column: span 1;
    background:
      linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(238, 249, 251, 0.96));
  }

  .window-bar b {
    display: none;
  }

  .section {
    padding: 58px 0;
  }

  .section-copy h2,
  .section-head h2,
  .cta-inner h2 {
    font-size: 28px;
  }

  .toc {
    display: none;
  }

  .guide-block,
  .feature-card {
    padding: 22px;
  }

  .steps div {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

  .timeline::before {
    left: 15px;
  }

  .timeline div {
    grid-template-columns: 1fr;
    padding-left: 38px;
    gap: 8px;
  }

  .timeline time {
    justify-content: flex-start;
    width: auto;
    background: transparent;
  }

  .timeline time::before {
    content: "";
    position: absolute;
    left: -29px;
    top: 10px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--brand);
  }

  .update-item {
    padding: 22px;
  }

  .update-item time {
    position: static;
    display: inline-flex;
    margin-bottom: 12px;
  }

  .update-timeline {
    padding-left: 16px;
  }

  .update-item::before {
    left: -22px;
    top: 28px;
  }

  .cta-inner {
    align-items: stretch;
    flex-direction: column;
  }

}

@media (max-width: 420px) {
  .hero h1 {
    font-size: 38px;
  }

  .section-copy h2,
  .section-head h2,
  .cta-inner h2 {
    font-size: 25px;
  }

  .quick-grid a,
  .feature-card,
  .guide-block,
  .update-item {
    padding: 18px;
  }
}