:root {
  --bg: #171210;
  --bg-2: #201815;
  --paper: #f8f3ea;
  --paper-2: #efe4d6;
  --ink: #241a16;
  --muted: #6b5c54;
  --line: rgba(71, 46, 34, 0.16);
  --line-dark: rgba(255, 239, 214, 0.18);
  --red: #a33a32;
  --red-2: #cf5a44;
  --gold: #d7a650;
  --teal: #4e8791;
  --title: #b43c34;
  --title-dark: #f2b26a;
  --shadow: 0 22px 70px rgba(31, 15, 10, 0.22);
  --shadow-hover: 0 24px 60px rgba(85, 38, 24, 0.18);
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --container: 1080px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 15.5px;
  line-height: 1.62;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 0%, rgba(207, 90, 68, 0.16), transparent 30rem),
    linear-gradient(180deg, #fffaf1 0%, #f2e6d6 42%, #fff9ee 100%);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

p {
  margin: 0 0 0.82rem;
}

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

h1 {
  font-size: clamp(2rem, 4.8vw, 4rem);
  font-weight: 900;
  color: var(--title);
}

h2 {
  font-size: clamp(1.45rem, 3vw, 2.35rem);
  font-weight: 850;
  color: var(--title);
  text-align: center;
}

h3 {
  font-size: 1.04rem;
  font-weight: 800;
}

.text-accent {
  color: var(--red);
  font-weight: 900;
}

.section-dark .text-accent,
.hero .text-accent,
.download .text-accent,
.guide-aside .text-accent {
  color: var(--gold);
}

button,
summary {
  font: inherit;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 1000;
  transform: translateY(-140%);
  padding: 0.65rem 0.9rem;
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  background: rgba(23, 18, 16, 0.76);
  color: #fff8ea;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(23, 18, 16, 0.94);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
  font-weight: 850;
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  object-fit: cover;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.brand:hover,
.brand:focus-visible {
  color: #f2b26a;
  transform: translateY(-1px);
}

.brand:hover img,
.brand:focus-visible img {
  transform: scale(1.06);
  border-color: rgba(242, 178, 106, 0.72);
  box-shadow: 0 0 0 4px rgba(242, 178, 106, 0.12);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  position: relative;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.82rem;
  border-radius: var(--radius);
  color: rgba(255, 248, 234, 0.86);
  font-size: 0.9rem;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0.82rem;
  right: 0.82rem;
  bottom: 0.3rem;
  height: 2px;
  background: #f2b26a;
  border-radius: 999px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s var(--ease);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  transform: translateY(-1px);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.site-nav .nav-download {
  margin-left: 0.25rem;
  color: #fff;
  background: linear-gradient(135deg, #d9573f, #a9352f);
  box-shadow: 0 10px 22px rgba(163, 58, 50, 0.24);
}

.site-nav .nav-download::after {
  display: none;
}

.site-nav .nav-download:hover,
.site-nav .nav-download:focus-visible {
  background: linear-gradient(135deg, #ef6a4f, #b93b33);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(242, 178, 106, 0.5);
  transform: translateY(-1px);
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle.is-open span:not(.sr-only):nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open span:not(.sr-only):nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:not(.sr-only):nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.section {
  padding: clamp(3rem, 6vw, 5.4rem) 0;
}

.section-dark {
  color: #fff7e8;
  background: var(--bg);
}

.section-warm {
  background:
    linear-gradient(180deg, rgba(255, 248, 235, 0.82), rgba(235, 220, 197, 0.82)),
    repeating-linear-gradient(90deg, rgba(79, 45, 33, 0.05), rgba(79, 45, 33, 0.05) 1px, transparent 1px, transparent 80px);
}

.hero {
  position: relative;
  min-height: 92vh;
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: 7rem 0 3.2rem;
}

.hero-bg,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-bg {
  background-image: url("img/tu3.webp");
  background-position: center;
  background-size: cover;
  transform: scale(1.03);
  filter: saturate(0.92) contrast(1.04);
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(19, 13, 11, 0.95) 0%, rgba(19, 13, 11, 0.74) 42%, rgba(19, 13, 11, 0.35) 100%),
    linear-gradient(180deg, rgba(19, 13, 11, 0.5), rgba(19, 13, 11, 0.88));
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  align-items: end;
  gap: clamp(1.5rem, 4.5vw, 3.8rem);
}

.hero-copy {
  max-width: 700px;
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--red-2);
  font-size: 0.72rem;
  font-weight: 850;
  text-transform: uppercase;
}

.section-dark .eyebrow {
  color: #f2b26a;
}

.section-dark h1,
.section-dark h2 {
  color: var(--title-dark);
}

.hero-lead {
  max-width: 660px;
  margin-top: 0.9rem;
  color: rgba(255, 247, 232, 0.88);
  font-size: clamp(0.98rem, 1.55vw, 1.12rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.35rem;
}

.btn {
  position: relative;
  overflow: hidden;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.62rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 850;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.24) 45%, transparent 60%);
  transform: translateX(-120%);
  transition: transform 0.55s var(--ease);
}

.btn:hover::before,
.btn:focus-visible::before {
  transform: translateX(120%);
}

.btn > * {
  position: relative;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, #d9573f, #a9352f);
  color: #fff;
  box-shadow: 0 16px 34px rgba(163, 58, 50, 0.34);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 18px 42px rgba(163, 58, 50, 0.42);
}

.btn-ghost {
  color: #fff9ec;
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.08);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: rgba(242, 178, 106, 0.62);
  background: rgba(242, 178, 106, 0.12);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  max-width: 680px;
  margin: 1.5rem 0 0;
}

.hero-meta div {
  padding: 0.68rem 0.78rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

.hero-meta dt {
  color: rgba(255, 247, 232, 0.64);
  font-size: 0.76rem;
}

.hero-meta dd {
  margin: 0.2rem 0 0;
  font-weight: 850;
}

.hero-panel {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(23, 18, 16, 0.82);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.hero-panel img {
  width: 100%;
  aspect-ratio: 460 / 215;
  object-fit: cover;
  transition: transform 0.35s var(--ease), filter 0.35s var(--ease);
}

.hero-panel:hover,
.hero-panel:focus-within {
  transform: translateY(-4px);
  border-color: rgba(242, 178, 106, 0.36);
  box-shadow: 0 28px 88px rgba(0, 0, 0, 0.42);
}

.hero-panel:hover img {
  transform: scale(1.035);
  filter: saturate(1.05);
}

.panel-body {
  padding: 0.95rem;
}

.panel-body ul {
  margin: 0;
  padding-left: 1.1rem;
  color: rgba(255, 247, 232, 0.82);
}

.panel-kicker {
  margin-bottom: 0.5rem;
  color: #f2b26a;
  font-weight: 850;
}

.quick-nav {
  position: relative;
  z-index: 2;
  margin-top: -1.7rem;
  padding-bottom: 1rem;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
}

.quick-grid a {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 0.24rem;
  min-height: 98px;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 249, 237, 0.94);
  box-shadow: var(--shadow);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease), background 0.22s var(--ease);
}

.quick-grid a::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--red), var(--gold));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.22s var(--ease);
}

.quick-grid a:hover,
.quick-grid a:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(163, 58, 50, 0.38);
  background: rgba(255, 252, 245, 0.98);
  box-shadow: var(--shadow-hover);
}

.quick-grid a:hover::before,
.quick-grid a:focus-visible::before {
  transform: scaleY(1);
}

.quick-grid a:hover strong,
.quick-grid a:focus-visible strong {
  color: var(--red);
}

.quick-grid span {
  color: var(--red);
  font-weight: 900;
}

.quick-grid strong {
  font-size: 0.98rem;
}

.quick-grid em {
  color: var(--muted);
  font-style: normal;
  font-size: 0.84rem;
}

.two-column,
.strategy-grid,
.guide-layout,
.faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.75fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.section-copy p,
.section-heading p {
  color: var(--muted);
}

.section-copy h2,
.section-heading h2 {
  margin-bottom: 0.85rem;
}

.section-heading {
  max-width: 860px;
  margin: 0 auto 1.55rem;
  text-align: center;
}

.section-heading.align-left {
  margin-inline: auto;
  text-align: center;
}

.media-card,
.wide-media,
.gallery-item {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #1b1512;
  box-shadow: var(--shadow);
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease), border-color 0.24s var(--ease);
}

.media-card img,
.wide-media img,
.gallery-item img {
  width: 100%;
  object-fit: cover;
  transition: transform 0.4s var(--ease), filter 0.4s var(--ease);
}

.media-card:hover,
.wide-media:hover,
.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.media-card:hover img,
.wide-media:hover img,
.gallery-item:hover img {
  transform: scale(1.035);
  filter: saturate(1.05) contrast(1.03);
}

.media-card figcaption,
.wide-media figcaption,
.gallery-item figcaption {
  padding: 0.8rem 1rem;
  color: rgba(255, 247, 232, 0.8);
  font-size: 0.92rem;
  background: #1b1512;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.feature-card {
  position: relative;
  min-height: 196px;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 241, 0.78);
  box-shadow: 0 12px 42px rgba(84, 45, 31, 0.08);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease), background 0.22s var(--ease);
}

.feature-card::after {
  content: "";
  position: absolute;
  inset: auto 1rem 0;
  height: 3px;
  background: linear-gradient(90deg, var(--red), var(--gold), var(--teal));
  border-radius: 999px 999px 0 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s var(--ease);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(163, 58, 50, 0.28);
  background: rgba(255, 252, 245, 0.92);
  box-shadow: var(--shadow-hover);
}

.feature-card:hover::after {
  transform: scaleX(1);
}

.feature-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  border-radius: var(--radius);
  color: #fff;
  background: linear-gradient(135deg, var(--red), #6f2927);
  font-weight: 900;
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.feature-card:hover .feature-icon {
  transform: translateY(-2px) rotate(-3deg);
  box-shadow: 0 10px 24px rgba(163, 58, 50, 0.26);
}

.feature-card h3 {
  margin-bottom: 0.5rem;
}

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

.wide-media {
  margin-top: 1.1rem;
}

.guide-layout {
  grid-template-columns: minmax(0, 1fr) 290px;
  align-items: start;
}

.timeline {
  position: relative;
  display: grid;
  gap: 0.82rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5.4rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, rgba(163, 58, 50, 0.55), rgba(78, 135, 145, 0.2));
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 8.5rem minmax(0, 1fr);
  gap: 0.85rem;
  padding: 0.92rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 241, 0.82);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease), background 0.22s var(--ease);
}

.timeline-item:hover {
  transform: translateX(4px);
  border-color: rgba(163, 58, 50, 0.28);
  background: rgba(255, 252, 245, 0.94);
  box-shadow: 0 14px 36px rgba(84, 45, 31, 0.1);
}

.timeline-day {
  align-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0.25rem 0.62rem;
  border-radius: var(--radius);
  color: #fff;
  background: #24201e;
  font-weight: 900;
  white-space: nowrap;
  transition: background 0.22s var(--ease), color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.timeline-item:hover .timeline-day {
  color: #241a16;
  background: var(--gold);
  box-shadow: 0 8px 18px rgba(215, 166, 80, 0.28);
}

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

.guide-aside {
  position: sticky;
  top: 92px;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #201815;
  color: #fff7e8;
  box-shadow: var(--shadow);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.guide-aside:hover {
  transform: translateY(-3px);
  border-color: rgba(242, 178, 106, 0.28);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.26);
}

.guide-aside h3 {
  margin-bottom: 0.8rem;
}

.guide-aside ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: rgba(255, 247, 232, 0.82);
}

.text-link {
  color: #f2b26a;
  font-weight: 850;
  text-decoration: underline;
  text-underline-offset: 0.2em;
  transition: color 0.2s var(--ease), text-underline-offset 0.2s var(--ease);
}

.text-link:hover,
.text-link:focus-visible {
  color: #ffd08a;
  text-underline-offset: 0.34em;
}

.strategy {
  background:
    linear-gradient(135deg, rgba(23, 18, 16, 0.97), rgba(45, 26, 21, 0.96)),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.03) 1px, transparent 1px, transparent 68px);
}

.strategy-grid {
  grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1fr);
}

.section-dark .section-copy p {
  color: rgba(255, 247, 232, 0.78);
}

.media-stack {
  display: grid;
  gap: 1rem;
  margin: 0;
}

.media-stack img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
  object-fit: cover;
}

.media-stack img:first-child {
  aspect-ratio: 16 / 9;
}

.media-stack img:last-child {
  aspect-ratio: 16 / 7.2;
}

.strategy-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1.05rem;
}

.strategy-list article {
  padding: 0.9rem;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  transition: transform 0.22s var(--ease), background 0.22s var(--ease), border-color 0.22s var(--ease);
}

.strategy-list article:hover {
  transform: translateY(-4px);
  border-color: rgba(242, 178, 106, 0.32);
  background: rgba(255, 255, 255, 0.1);
}

.strategy-list h3 {
  margin-bottom: 0.45rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.updates .two-column {
  align-items: start;
}

.update-list {
  display: grid;
  gap: 0.9rem;
}

.update-list article {
  padding: 0.9rem;
  border-left: 4px solid var(--red);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(255, 250, 241, 0.9);
  box-shadow: 0 10px 28px rgba(84, 45, 31, 0.08);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease), background 0.22s var(--ease);
}

.update-list article:hover {
  transform: translateX(4px);
  background: rgba(255, 252, 245, 0.98);
  box-shadow: 0 14px 34px rgba(84, 45, 31, 0.12);
}

.update-list time {
  color: var(--red);
  font-weight: 900;
  font-size: 0.9rem;
}

.update-list h3 {
  margin: 0.2rem 0 0.35rem;
}

.update-list p {
  margin: 0;
  color: var(--muted);
}

.faq-layout {
  grid-template-columns: 0.65fr 1fr;
  align-items: start;
}

.faq-list {
  display: grid;
  gap: 0.68rem;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 250, 241, 0.9);
  box-shadow: 0 10px 28px rgba(84, 45, 31, 0.07);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease), background 0.22s var(--ease);
}

.faq-list details:hover,
.faq-list details[open] {
  border-color: rgba(163, 58, 50, 0.26);
  background: rgba(255, 252, 245, 0.98);
  box-shadow: 0 14px 34px rgba(84, 45, 31, 0.1);
}

.faq-list details:hover {
  transform: translateY(-2px);
}

.faq-list summary {
  cursor: pointer;
  padding: 0.86rem 2.4rem 0.86rem 0.9rem;
  font-weight: 850;
  list-style: none;
  position: relative;
  transition: color 0.2s var(--ease);
}

.faq-list summary:hover {
  color: var(--red);
}

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

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--red);
  font-size: 1.25rem;
  font-weight: 900;
}

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

.faq-list details p {
  margin: 0;
  padding: 0 0.9rem 0.9rem;
  color: var(--muted);
}

.download {
  padding: 3rem 0;
  background:
    linear-gradient(90deg, rgba(23, 18, 16, 0.96), rgba(67, 34, 27, 0.94)),
    url("img/tu1.jpg") center / cover;
}

.download-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.15rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.download-inner:hover {
  transform: translateY(-3px);
  border-color: rgba(242, 178, 106, 0.28);
  background: rgba(255, 255, 255, 0.08);
}

.download h2 {
  margin-bottom: 0.65rem;
  text-align: center;
}

.download p {
  color: rgba(255, 247, 232, 0.78);
}

.site-footer {
  padding: 1.6rem 0;
  color: rgba(255, 247, 232, 0.76);
  background: #110d0c;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-grid p {
  max-width: 680px;
  margin: 0.35rem 0 0;
}

.footer-grid nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.8rem;
}

.footer-grid a {
  color: #f2b26a;
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.footer-grid a:hover,
.footer-grid a:focus-visible {
  color: #ffd08a;
  transform: translateY(-1px);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.58s ease, transform 0.58s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

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

@media (max-width: 960px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.5rem);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.7rem;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius);
    background: rgba(23, 18, 16, 0.98);
    box-shadow: 0 18px 46px rgba(0, 0, 0, 0.28);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    justify-content: center;
  }

  .site-nav .nav-download {
    margin-left: 0;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .two-column,
  .strategy-grid,
  .guide-layout,
  .faq-layout {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    max-width: 520px;
  }

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

  .guide-aside {
    position: static;
  }

  .download-inner,
  .footer-grid {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-grid nav {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 1.2rem, var(--container));
  }

  .header-inner {
    min-height: 64px;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .hero {
    padding: 6.4rem 0 3.6rem;
  }

  .hero-grid {
    gap: 1.4rem;
  }

  .hero-meta,
  .quick-grid,
  .feature-grid,
  .strategy-list,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

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

  .quick-nav {
    margin-top: 0;
    padding-top: 1rem;
  }

  .section {
    padding: 3.4rem 0;
  }

  .timeline::before {
    left: 1.4rem;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    padding-left: 1.1rem;
  }

  .timeline-day {
    justify-self: start;
  }

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