@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;900&family=ZCOOL+XiaoWei&display=swap");

:root {
  --ink: #0a2f38;
  --ink-soft: #1f4d57;
  --coral: #ff4d6d;
  --coral-deep: #e02f52;
  --mint: #7de2c8;
  --mist: #eef7f6;
  --fog: #f7fcfb;
  --sand: #fff3ea;
  --line: rgba(10, 47, 56, 0.12);
  --glass: rgba(255, 255, 255, 0.55);
  --shadow: 0 18px 40px rgba(10, 47, 56, 0.12);
  --radius: 22px;
  --max: 1120px;
  --nav-h: 64px;
  --rail-h: 92px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(125, 226, 200, 0.35), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(255, 77, 109, 0.18), transparent 55%),
    linear-gradient(180deg, #f4fbfa 0%, #eef7f6 40%, #f8fffe 100%);
  line-height: 1.75;
  min-height: 100vh;
}

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

a {
  color: var(--coral-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--ink);
}

.pkb-shell {
  width: min(100% - 32px, var(--max));
  margin-inline: auto;
}

.pkb-promo {
  background: linear-gradient(90deg, #0a2f38, #1a5561 50%, #0a2f38);
  color: #fff;
  padding: 14px 0 10px;
  border-bottom: 1px solid rgba(125, 226, 200, 0.25);
}

.pkb-promo-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  font-size: 13px;
}

.pkb-promo-head strong {
  font-family: "ZCOOL XiaoWei", serif;
  font-size: 18px;
  letter-spacing: 0.04em;
}

.pkb-promo-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--coral), #ff7a59);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 12px;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(255, 77, 109, 0.35);
}

.pkb-promo-cta:hover {
  color: #fff;
  transform: translateY(-1px);
}

.pkb-ads-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

@media (min-width: 900px) {
  .pkb-ads-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }
}

.pkb-dl-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: #fff;
  font-size: 11px;
}

.pkb-dl-chip img {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  object-fit: cover;
  background: #fff;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.22);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pkb-dl-chip:hover img {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.28);
}

.pkb-dl-chip span {
  max-width: 72px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  opacity: 0.9;
}

.pkb-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(247, 252, 251, 0.82);
  border-bottom: 1px solid var(--line);
  height: var(--nav-h);
}

.pkb-nav {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.pkb-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.pkb-brand img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
}

.pkb-brand b {
  font-family: "ZCOOL XiaoWei", serif;
  font-size: 22px;
  letter-spacing: 0.06em;
}

.pkb-nav-links {
  display: none;
  gap: 18px;
  align-items: center;
}

.pkb-nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

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

.pkb-nav-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--glass);
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.pkb-nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--ink);
  transition: 0.2s ease;
}

.pkb-nav-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.pkb-nav-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.pkb-nav-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 860px) {
  .pkb-nav-toggle {
    display: none;
  }
  .pkb-nav-links {
    display: flex;
  }
}

.pkb-nav-links.is-open {
  display: flex;
  position: absolute;
  top: var(--nav-h);
  left: 0;
  right: 0;
  flex-direction: column;
  align-items: flex-start;
  padding: 16px 20px 20px;
  background: rgba(247, 252, 251, 0.96);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow);
}

#pkb-sticky-rail {
  position: sticky;
  top: var(--nav-h);
  z-index: 40;
  background: rgba(10, 47, 56, 0.94);
  color: #fff;
  padding: 10px 0;
  transform: translateY(-120%);
  opacity: 0;
  pointer-events: none;
  transition: 0.25s ease;
  border-bottom: 1px solid rgba(125, 226, 200, 0.2);
}

#pkb-sticky-rail.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

body.pkb-rail-open .pkb-stage {
  scroll-margin-top: calc(var(--nav-h) + var(--rail-h));
}

.pkb-rail-label {
  font-size: 12px;
  opacity: 0.8;
  margin-bottom: 8px;
}

.pkb-hero {
  position: relative;
  overflow: hidden;
  min-height: min(92vh, 860px);
  display: grid;
  align-items: end;
  padding: 48px 0 56px;
  isolation: isolate;
}

.pkb-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 47, 56, 0.15) 0%, rgba(10, 47, 56, 0.72) 100%),
    url("screen-comic-serial.jpg") center/cover no-repeat;
  z-index: -2;
  transform: scale(1.04);
  animation: pkbDrift 18s ease-in-out infinite alternate;
}

.pkb-hero::after {
  content: "";
  position: absolute;
  inset: auto -20% -30% 35%;
  height: 55%;
  background: radial-gradient(circle, rgba(255, 77, 109, 0.45), transparent 70%);
  filter: blur(10px);
  z-index: -1;
  animation: pkbPulse 6s ease-in-out infinite;
}

@keyframes pkbDrift {
  from {
    transform: scale(1.04) translateY(0);
  }
  to {
    transform: scale(1.1) translateY(-12px);
  }
}

@keyframes pkbPulse {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 0.9;
  }
}

.pkb-hero-copy {
  color: #fff;
  max-width: 720px;
}

.pkb-hero-copy .pkb-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.pkb-hero-copy .pkb-mark img {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.pkb-hero-copy .pkb-mark span {
  font-family: "ZCOOL XiaoWei", serif;
  font-size: clamp(34px, 8vw, 58px);
  letter-spacing: 0.08em;
  line-height: 1.1;
}

.pkb-hero h1 {
  margin: 0 0 14px;
  font-size: clamp(22px, 4.5vw, 34px);
  font-weight: 900;
  line-height: 1.35;
}

.pkb-hero p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.88);
}

.pkb-crumb {
  padding: 18px 0 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

.pkb-crumb a {
  color: var(--ink-soft);
  text-decoration: none;
}

.pkb-crumb a:hover {
  color: var(--coral-deep);
}

.pkb-stage {
  padding: 28px 0 64px;
}

.pkb-section {
  margin: 42px 0;
  animation: pkbRise 0.7s ease both;
}

@keyframes pkbRise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.pkb-kicker {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--coral-deep);
  margin-bottom: 8px;
}

.pkb-section h2 {
  font-family: "ZCOOL XiaoWei", serif;
  font-size: clamp(26px, 4vw, 36px);
  margin: 0 0 14px;
  letter-spacing: 0.03em;
}

.pkb-section h3 {
  font-size: 20px;
  margin: 22px 0 10px;
}

.pkb-section p {
  margin: 0 0 14px;
  color: var(--ink-soft);
  font-size: 15px;
}

.pkb-prose p {
  text-align: justify;
}

.pkb-split {
  display: grid;
  gap: 22px;
  align-items: center;
}

@media (min-width: 860px) {
  .pkb-split {
    grid-template-columns: 1.05fr 0.95fr;
  }
  .pkb-split.is-flip {
    grid-template-columns: 0.95fr 1.05fr;
  }
  .pkb-split.is-flip .pkb-media {
    order: -1;
  }
}

.pkb-media {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #fff;
}

.pkb-media img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
  max-height: 560px;
}

.pkb-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 70%, rgba(10, 47, 56, 0.18));
  pointer-events: none;
}

.pkb-glass {
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(14px);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.pkb-mosaic {
  display: grid;
  gap: 14px;
}

@media (min-width: 700px) {
  .pkb-mosaic {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pkb-tile {
  background: #fff;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(10, 47, 56, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.pkb-tile:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 36px rgba(10, 47, 56, 0.14);
}

.pkb-tile img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  object-position: top;
}

.pkb-tile-body {
  padding: 16px;
}

.pkb-tile-body h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.pkb-tile-body p {
  margin: 0;
  font-size: 14px;
}

.pkb-ribbon {
  display: grid;
  gap: 14px;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 1fr);
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
}

.pkb-ribbon::-webkit-scrollbar {
  height: 6px;
}

.pkb-ribbon::-webkit-scrollbar-thumb {
  background: rgba(10, 47, 56, 0.25);
  border-radius: 999px;
}

.pkb-ribbon-item {
  scroll-snap-align: start;
  background: linear-gradient(160deg, #fff, var(--sand));
  border-radius: 20px;
  padding: 18px;
  border: 1px solid var(--line);
  min-height: 160px;
}

.pkb-ribbon-item strong {
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
}

.pkb-faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.pkb-faq summary {
  cursor: pointer;
  font-weight: 700;
}

.pkb-faq p {
  margin: 10px 0 0;
}

.pkb-legal {
  background: #fff;
  border-radius: 24px;
  padding: 28px 22px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.pkb-legal h1 {
  font-family: "ZCOOL XiaoWei", serif;
  font-size: clamp(28px, 5vw, 40px);
  margin: 0 0 12px;
}

.pkb-legal h2 {
  margin-top: 28px;
}

.pkb-footer {
  background: #0a2f38;
  color: rgba(255, 255, 255, 0.82);
  padding: 42px 0 28px;
  margin-top: 40px;
}

.pkb-footer a {
  color: var(--mint);
  text-decoration: none;
}

.pkb-footer-grid {
  display: grid;
  gap: 22px;
}

@media (min-width: 760px) {
  .pkb-footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.pkb-footer h3 {
  color: #fff;
  font-family: "ZCOOL XiaoWei", serif;
  margin: 0 0 12px;
}

.pkb-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pkb-footer li {
  margin-bottom: 8px;
}

.pkb-copy {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 13px;
  opacity: 0.75;
}

.pkb-error {
  min-height: 60vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 48px 0;
}

.pkb-error h1 {
  font-family: "ZCOOL XiaoWei", serif;
  font-size: clamp(42px, 10vw, 72px);
  margin: 0 0 8px;
}

.pkb-error p {
  color: var(--ink-soft);
}

.pkb-btn-link {
  display: inline-flex;
  margin-top: 16px;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
}

.pkb-btn-link:hover {
  color: #fff;
  background: var(--coral-deep);
}

.pkb-inline-note {
  display: inline;
}

.pkb-wave {
  height: 48px;
  background: linear-gradient(90deg, transparent, rgba(125, 226, 200, 0.35), transparent);
  mask: radial-gradient(circle at 10px 0, #000 9px, transparent 10px);
  mask-size: 20px 48px;
  opacity: 0.7;
  margin: 10px 0 24px;
}