:root {
  --ink: #1b1714;
  --ink-soft: #5a5048;
  --banner: #9c2b24;
  --banner-deep: #7a201b;
  --bronze: #b08a45;
  --bronze-deep: #8d6c32;
  --stone: #f2efe9;
  --mist: #e5dfd5;
  --line: rgba(27, 23, 20, 0.14);
  --white: #ffffff;
  --shadow: 0 18px 44px rgba(27, 23, 20, 0.14);
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --nav-h: 70px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    linear-gradient(180deg, #f6f3ed 0%, var(--stone) 50%, #ebe6dc 100%);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; border: 0; background: none; cursor: pointer; }

.container {
  width: min(1120px, calc(100% - 2.4rem));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1000;
  padding: 0.7rem 1rem;
  background: var(--ink);
  color: var(--white);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-h);
  color: rgba(255,255,255,0.95);
  transition: 0.35s var(--ease);
}
.site-header.is-scrolled {
  color: var(--ink);
  background: rgba(242, 239, 233, 0.94);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--line);
}

.nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.08em;
}
.brand-flag {
  width: 0.85rem;
  height: 1.2rem;
  background: linear-gradient(180deg, var(--banner), var(--bronze));
  clip-path: polygon(0 0, 100% 0, 100% 78%, 50% 100%, 0 78%);
}

.nav-links {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-size: 0.94rem;
  opacity: 0.88;
  letter-spacing: 0.04em;
}
.nav-links a:hover { opacity: 1; color: var(--bronze); }
.site-header:not(.is-scrolled) .nav-links a:hover { color: var(--bronze); }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 6px;
  color: inherit;
}
.site-header.is-scrolled .nav-toggle {
  border-color: var(--line);
  background: rgba(255,255,255,0.65);
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 17px;
  height: 1.5px;
  background: currentColor;
  position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle span::before { top: -5px; }
.nav-toggle span::after { top: 5px; }

/* Hero: full-bleed with command board overlay strip */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
}
.hero-media { position: absolute; inset: 0; }
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: drift 18s var(--ease) infinite alternate;
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(20,16,12,0.35) 0%, rgba(20,16,12,0.2) 40%, rgba(20,16,12,0.82) 100%),
    linear-gradient(90deg, rgba(20,16,12,0.55), transparent 55%);
}
.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 2.4rem));
  margin: 0 auto;
  padding: calc(var(--nav-h) + 3rem) 0 4.2rem;
}
.hero-tag {
  display: inline-block;
  margin: 0 0 0.9rem;
  padding: 0.28rem 0.7rem;
  border: 1px solid rgba(176, 138, 69, 0.7);
  color: var(--bronze);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.8s var(--ease) 0.08s forwards;
}
.hero-brand {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.8rem);
  letter-spacing: 0.12em;
  line-height: 1.05;
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.8s var(--ease) 0.2s forwards;
}
.hero-title {
  margin: 0 0 0.85rem;
  max-width: 18em;
  font-size: clamp(1.15rem, 2.6vw, 1.65rem);
  font-weight: 600;
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.8s var(--ease) 0.34s forwards;
}
.hero-desc {
  margin: 0 0 1.5rem;
  max-width: 34em;
  color: rgba(255,255,255,0.88);
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.8s var(--ease) 0.46s forwards;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  opacity: 0;
  transform: translateY(16px);
  animation: rise 0.8s var(--ease) 0.58s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.35rem;
  border-radius: 4px;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  transition: 0.25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--banner); color: #fff; }
.btn-primary:hover { background: var(--banner-deep); }
.btn-fast { background: var(--bronze); color: #1b1714; }
.btn-fast:hover { background: #c49a52; }
.btn-ghost {
  border: 1px solid rgba(255,255,255,0.5);
  color: #fff;
}
.btn-ghost:hover { background: rgba(255,255,255,0.08); }
.btn-solid { background: var(--banner); color: #fff; }
.btn-solid:hover { background: var(--banner-deep); }
.btn-outline {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255,255,255,0.7);
}
.btn-outline:hover {
  border-color: var(--banner);
  color: var(--banner-deep);
}

.section { padding: clamp(3.6rem, 7vw, 5.8rem) 0; }

.section-head {
  max-width: 40rem;
  margin-bottom: 1.8rem;
}
.eyebrow {
  margin: 0 0 0.55rem;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--banner);
}
.section-head h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3.3vw, 2.35rem);
  letter-spacing: 0.06em;
}
.section-head p { margin: 0; color: var(--ink-soft); }

/* Campaign board layout */
.board {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 0;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #fffdf8;
}
.board-map {
  min-height: 420px;
  overflow: hidden;
}
.board-map img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
}
.board-side {
  padding: clamp(1.2rem, 3vw, 2rem);
  border-left: 1px solid var(--line);
  display: grid;
  align-content: center;
  gap: 0.9rem;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 27px,
      rgba(176, 138, 69, 0.08) 27px 28px
    );
}
.board-side p {
  margin: 0;
  color: var(--ink-soft);
}

/* Banner command strip */
.command {
  background: linear-gradient(90deg, #2a221c, #3a2e24 40%, #2a221c);
  color: #fff;
  padding: 1.1rem 0;
}
.command-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.4rem;
  justify-content: space-between;
  align-items: center;
}
.command-item {
  display: grid;
  gap: 0.15rem;
}
.command-item strong {
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  color: var(--bronze);
}
.command-item span {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.78);
}

/* Strategy columns */
.strategy {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.strategy article {
  background: #fffdf8;
  padding: 1.3rem 1.1rem;
}
.strategy h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.06em;
}
.strategy p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.war-band {
  background: linear-gradient(180deg, rgba(229, 223, 213, 0.8), rgba(242, 239, 233, 0.95));
}

.split-war {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(1.2rem, 3vw, 2rem);
  align-items: center;
}
.war-visual {
  overflow: hidden;
  min-height: 360px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.war-visual img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}
.war-copy h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: 0.06em;
}
.war-copy p {
  margin: 0 0 0.9rem;
  color: var(--ink-soft);
}

.showcase {
  position: relative;
  overflow: hidden;
  min-height: 420px;
  display: grid;
  align-items: end;
  color: #fff;
  border: 1px solid rgba(0,0,0,0.08);
  box-shadow: var(--shadow);
}
.showcase img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.showcase::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20,16,12,0.12), rgba(20,16,12,0.82));
}
.showcase-copy {
  position: relative;
  z-index: 1;
  padding: clamp(1.4rem, 4vw, 2.5rem);
  max-width: 38rem;
}
.showcase-copy h2 {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: 0.08em;
}
.showcase-copy p {
  margin: 0;
  color: rgba(255,255,255,0.9);
}

.download-panel {
  position: relative;
  overflow: hidden;
  min-height: 300px;
  display: grid;
  align-items: center;
  color: #fff;
  box-shadow: var(--shadow);
}
.download-panel img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.download-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(20,16,12,0.88), rgba(20,16,12,0.4));
}
.download-copy {
  position: relative;
  z-index: 1;
  padding: clamp(1.5rem, 4vw, 2.8rem);
  max-width: 34rem;
}
.download-copy h2 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: 0.08em;
}
.download-copy p {
  margin: 0 0 1.2rem;
  color: rgba(255,255,255,0.9);
}
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-footer {
  padding: 2rem 0 2.4rem;
  border-top: 1px solid var(--line);
  background: rgba(242, 239, 233, 0.95);
}
.footer-inner {
  display: grid;
  gap: 1rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.seo-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.65rem;
}
.seo-keywords a {
  font-size: 0.8rem;
  color: var(--ink-soft);
  opacity: 0.82;
}
.seo-keywords a:hover {
  color: var(--banner-deep);
  opacity: 1;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: 0.75s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  to { opacity: 1; transform: none; }
}
@keyframes drift {
  from { transform: scale(1.04); }
  to { transform: scale(1.1) translate(-1%, -0.5%); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-media img,
  .hero-tag,
  .hero-brand,
  .hero-title,
  .hero-desc,
  .hero-actions,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

@media (max-width: 960px) {
  .board,
  .split-war,
  .strategy {
    grid-template-columns: 1fr;
  }
  .board-side { border-left: 0; border-top: 1px solid var(--line); }
  .board-map,
  .board-map img,
  .war-visual img {
    min-height: 260px;
  }
}

@media (max-width: 760px) {
  :root { --nav-h: 62px; }
  .nav-toggle { display: grid; }
  .nav-links {
    position: fixed;
    inset: var(--nav-h) 1rem auto;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 0.5rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: rgba(242,239,233,0.98);
    color: var(--ink);
    box-shadow: var(--shadow);
  }
  .nav-links.is-open { display: flex; }
  .nav-links a {
    padding: 0.8rem;
    border-radius: 8px;
  }
  .nav-links a:hover { background: var(--mist); }
  .strategy { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .container,
  .hero-content { width: min(1120px, calc(100% - 1.3rem)); }
  .hero-actions,
  .download-actions { width: 100%; }
  .btn { width: 100%; }
  .strategy { grid-template-columns: 1fr; }
}