/* ===================================================================
   凯璇网络 · 官网样式
   风格: 明快锐利 / 斜切色块 / 游戏门户感
   =================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Unbounded:wght@600;700;800&family=Manrope:wght@400;500;600;700;800&display=swap");

:root {
  --bg: #f5f6ff;
  --surface: #ffffff;
  --ink: #14163a;
  --ink-soft: #5b5e82;

  --indigo: #4739ff;
  --indigo-deep: #2e22cc;
  --indigo-tint: #e7e4ff;

  --pink: #ff3e9a;
  --pink-tint: #ffe1f0;

  --lime: #b6ff3e;
  --lime-deep: #7fcb0e;
  --lime-tint: #eeffd1;

  --line: rgba(20, 22, 58, 0.12);
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font-family: "Manrope", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

main {
  flex: 1;
}

h1,
h2,
h3 {
  font-family: "Unbounded", sans-serif;
  font-weight: 700;
  line-height: 1.25;
  margin: 0;
}

p {
  margin: 0;
}

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

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 246, 255, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--indigo), var(--pink));
  display: grid;
  place-items: center;
  color: #fff;
  font-family: "Unbounded", sans-serif;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.brand-title {
  font-family: "Unbounded", sans-serif;
  font-weight: 700;
  font-size: 1.02rem;
}

.brand-sub {
  font-size: 0.7rem;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  position: relative;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--ink-soft);
  transition: background 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--indigo-deep);
}

.nav-links a.active {
  background: var(--indigo-tint);
  color: var(--indigo-deep);
}

.nav-links a.active::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--pink);
  margin-right: 6px;
  vertical-align: middle;
}

.nav-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  display: block;
  width: 16px;
  height: 2px;
  background: var(--ink);
  position: relative;
}

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

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

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: 76px 0 60px;
  overflow: hidden;
}

.hero-small {
  padding: 54px 0 44px;
}

.hero-slab {
  position: absolute;
  top: -120px;
  right: -160px;
  width: 620px;
  height: 620px;
  background: linear-gradient(135deg, var(--indigo), var(--indigo-deep));
  clip-path: polygon(30% 0%, 100% 0%, 100% 100%, 0% 70%);
  opacity: 0.08;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--indigo-deep);
  background: var(--indigo-tint);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
  opacity: 0;
  animation: rise 0.6s ease forwards;
}

h1.display {
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  letter-spacing: -0.01em;
  opacity: 0;
  animation: rise 0.6s ease 0.08s forwards;
}

h1.display .hl-pink {
  color: var(--pink);
}

h1.display .hl-indigo {
  color: var(--indigo);
}

.lead-copy {
  margin-top: 20px;
  font-size: 1.03rem;
  color: var(--ink-soft);
  max-width: 640px;
  opacity: 0;
  animation: rise 0.6s ease 0.16s forwards;
}

.lead-copy + .lead-copy {
  margin-top: 14px;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- sections ---------- */
.section {
  padding: 20px 0 64px;
  position: relative;
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 30px;
}

.section-heading .tag {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pink);
}

.section-heading h2 {
  font-size: 1.4rem;
}

/* ---------- game showcase ---------- */
.game-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: center;
  padding: 36px;
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: 20px;
  position: relative;
}

.game-card + .game-card {
  margin-top: 28px;
}

.game-card:nth-child(even) {
  grid-template-columns: 1.1fr 0.9fr;
}

.game-card:nth-child(even) .game-image {
  order: 2;
}

.game-image {
  position: relative;
  aspect-ratio: 600 / 338;
  border-radius: 14px;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 88% 100%, 0 100%);
  border: 2px solid var(--ink);
}

.game-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.game-tag {
  position: absolute;
  top: 16px;
  left: -8px;
  background: var(--lime);
  color: var(--ink);
  font-family: "Unbounded", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 6px 16px;
  transform: rotate(-4deg);
  border-radius: 4px;
  box-shadow: 3px 3px 0 var(--ink);
  z-index: 2;
}

.game-info h3 {
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.game-info p {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

/* ---------- portal tiles (links to sub pages) ---------- */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.tile {
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: 16px;
  padding: 20px 16px;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 4px 4px 0 var(--line);
}

.tile:hover {
  transform: translateY(-4px);
  box-shadow: 6px 6px 0 var(--indigo-tint);
}

.tile .tile-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  margin: 0 auto 12px;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
}

.tile .tile-icon.i1 {
  background: var(--indigo-tint);
}
.tile .tile-icon.i2 {
  background: var(--pink-tint);
}
.tile .tile-icon.i3 {
  background: var(--lime-tint);
}
.tile .tile-icon.i4 {
  background: var(--indigo-tint);
}
.tile .tile-icon.i5 {
  background: var(--pink-tint);
}

.tile-label {
  font-family: "Unbounded", sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ---------- document pages ---------- */
.doc-card {
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 6px 6px 0 var(--indigo-tint);
}

.doc-card h3 {
  font-size: 1.15rem;
  color: var(--indigo-deep);
  margin-top: 28px;
  margin-bottom: 12px;
}

.doc-card h3:first-child {
  margin-top: 0;
}

.doc-card p {
  font-size: 0.98rem;
  color: var(--ink);
}

.doc-card p + p {
  margin-top: 14px;
}

.doc-card p.dim {
  color: var(--ink-soft);
}

.feature-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.feature-list li {
  font-size: 0.98rem;
  color: var(--ink);
}

.contact-rows {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.contact-row {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 20px;
}

.contact-row .label {
  font-weight: 700;
  font-family: "Unbounded", sans-serif;
  font-size: 0.82rem;
  color: var(--indigo-deep);
  display: block;
  margin-bottom: 6px;
}

.contact-row .value {
  color: var(--ink-soft);
  font-size: 0.94rem;
}

/* legal ordered list */
.doc-card ol,
.doc-card ul.plain {
  padding-left: 22px;
  margin: 14px 0 0;
}

.doc-card ol li,
.doc-card ul.plain li {
  font-size: 0.96rem;
  color: var(--ink);
  margin-bottom: 8px;
}

/* ---------- footer ---------- */
.site-footer {
  background: var(--indigo-tint);
  padding: 40px 0 30px;
}

.footer-advisory {
  text-align: center;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--indigo-deep);
  font-weight: 700;
  padding-bottom: 22px;
  margin-bottom: 22px;
  border-bottom: 1px solid rgba(46, 34, 204, 0.15);
}

.footer-meta {
  font-size: 0.8rem;
  color: var(--ink-soft);
  text-align: center;
}

.footer-meta a {
  color: var(--indigo-deep);
  text-decoration: underline;
}

.footer-meta p + p {
  margin-top: 6px;
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .tile-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 760px) {
  .nav-links {
    position: fixed;
    top: 74px;
    left: 16px;
    right: 16px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    box-shadow: 0 16px 30px rgba(20, 22, 58, 0.15);
    display: none;
    gap: 2px;
    z-index: 60;
  }

  .nav-toggle-input:checked ~ .nav-links {
    display: flex;
  }

  .nav-links a {
    text-align: center;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .game-card,
  .game-card:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .game-card:nth-child(even) .game-image {
    order: 0;
  }

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

  .doc-card {
    padding: 26px 22px;
  }

  .footer-grid {
    flex-direction: column;
  }

  .footer-meta {
    text-align: left;
  }
}