:root {
  --cream: #fdfbf7;
  --paper: #f4f0ea;
  --paper-deep: #ebe2da;
  --ink: #1b2a4a;
  --ink-soft: #4a3e3d;
  --muted: #756b68;
  --pink: #ffb7b2;
  --rose: #e8c5e5;
  --gold: #e6b863;
  --coral: #ff7f50;
  --white: #ffffff;
  --line: rgba(74, 62, 61, 0.16);
  --shadow: 0 24px 60px rgba(27, 42, 74, 0.12);
  --radius: 4px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--cream); color: var(--ink-soft); font-family: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif; font-size: 16px; line-height: 1.8; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }

::selection { background: var(--pink); color: var(--ink); }
:focus-visible { outline: 2px solid var(--coral); outline-offset: 4px; }

.ui-icon { display: inline-block; flex: 0 0 auto; width: 18px; height: 18px; object-fit: contain; filter: invert(58%) sepia(81%) saturate(2641%) hue-rotate(328deg) brightness(104%) contrast(101%); }
.skip-link .ui-icon, .button-primary .ui-icon { filter: brightness(0) invert(1); }

.container { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.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; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 20; display: inline-flex; align-items: center; gap: 7px; padding: 8px 14px; background: var(--ink); color: var(--white); transform: translateY(-150%); transition: transform 180ms ease; }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(74, 62, 61, 0.1); background: rgba(253, 251, 247, 0.92); backdrop-filter: blur(18px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 78px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); }
.brand-mark { display: block; width: 52px; height: 52px; object-fit: cover; object-position: center bottom; }
.brand strong, .brand small { display: block; }
.brand strong { font-family: Georgia, serif; font-size: 18px; letter-spacing: 0; }
.brand small { color: var(--muted); font-size: 11px; letter-spacing: 0; }
.main-nav { display: flex; align-items: center; gap: 8px; color: var(--ink); font-size: 14px; }
.main-nav a { position: relative; display: inline-flex; align-items: center; gap: 7px; white-space: nowrap; }
.main-nav .ui-icon { width: 16px; height: 16px; }
.main-nav .nav-cta .ui-icon { filter: invert(77%) sepia(41%) saturate(781%) hue-rotate(359deg) brightness(96%) contrast(88%); }
.main-nav a:not(.nav-cta) { padding: 8px; border: 1px solid transparent; border-radius: var(--radius); transition: border-color 180ms ease, box-shadow 180ms ease, color 180ms ease, text-shadow 180ms ease; }
.main-nav a:not(.nav-cta):hover, .main-nav a:not(.nav-cta):focus-visible { border-color: rgba(255, 127, 80, 0.86); box-shadow: 0 0 0 2px rgba(255, 127, 80, 0.14), 0 0 16px rgba(255, 127, 80, 0.26); color: #c94f2d; text-shadow: 0 0 10px rgba(255, 127, 80, 0.34); outline: none; }
.nav-cta { margin-left: 6px; padding: 8px 15px !important; border: 1px solid var(--gold); border-radius: 99px; color: var(--ink); transition: transform 180ms ease; }
.nav-cta:hover, .nav-cta:focus-visible { transform: translateY(-2px); }
.menu-toggle { display: none; place-items: center; width: 42px; height: 42px; padding: 0; border: 0; background: transparent; }
.menu-toggle .ui-icon { width: 25px; height: 25px; filter: invert(14%) sepia(38%) saturate(1357%) hue-rotate(182deg) brightness(92%) contrast(89%); }

.hero { position: relative; isolation: isolate; overflow: hidden; min-height: 670px; padding: 72px 0; background: var(--paper); }
.hero-backdrop { display: none; }
.hero-grid { position: relative; display: flex; align-items: center; min-height: 526px; }
.hero-copy { position: relative; z-index: 2; width: min(660px, 62%); }
.eyebrow, .section-kicker { display: flex; align-items: center; gap: 12px; margin: 0 0 18px; color: var(--coral); font-size: 12px; font-weight: 700; letter-spacing: 0; }
.eyebrow-line { width: 48px; height: 1px; background: var(--coral); }
h1, h2, h3 { margin: 0; color: var(--ink); font-family: Georgia, "Noto Serif SC", serif; font-weight: 500; line-height: 1.25; letter-spacing: 0; }
h1 { max-width: 700px; font-size: 58px; }
h2 { font-size: 44px; }
h3 { font-size: 19px; }
.hero-lead { max-width: 560px; margin: 24px 0 8px; color: var(--ink); font-size: 21px; }
.hero-text { max-width: 620px; margin: 0; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 50px; padding: 11px 23px; border: 1px solid transparent; border-radius: 99px; font-size: 15px; font-weight: 700; transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease; }
.button { position: relative; overflow: hidden; isolation: isolate; }
.button > * { position: relative; z-index: 1; }
.button::after { position: absolute; top: 0; bottom: 0; left: -80%; z-index: 0; width: 48%; background: rgba(255, 255, 255, 0.28); content: ""; transform: skewX(-20deg); transition: left 420ms ease; }
.button:hover::after, .button:focus-visible::after { left: 135%; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { background: var(--coral); box-shadow: 0 10px 24px rgba(255, 127, 80, 0.24); color: var(--white); }
.button-primary:hover, .button-primary:focus-visible { background: #ee6f46; box-shadow: 0 14px 30px rgba(255, 127, 80, 0.34); }
.button-quiet { border-color: var(--line); color: var(--ink); }
.hero-facts { display: flex; flex-wrap: wrap; gap: 20px; margin: 42px 0 0; padding: 0; }
.hero-facts div { min-width: 140px; padding-left: 12px; border-left: 2px solid var(--pink); }
.hero-facts dt { color: var(--muted); font-size: 12px; }
.hero-facts dd { margin: 2px 0 0; color: var(--ink); font-size: 14px; }
.hero-poster { position: absolute; top: -72px; bottom: -72px; left: 50%; z-index: 0; width: 100vw; margin: 0; overflow: hidden; transform: translateX(-50%); }
.poster-frame { position: absolute; inset: 0; overflow: hidden; }
.poster-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.poster-frame::after { position: absolute; inset: 0; background: rgba(244, 240, 234, 0.75); content: ""; pointer-events: none; }
.poster-stamp { position: absolute; right: 16px; bottom: 16px; z-index: 1; padding: 4px 9px; border: 1px solid rgba(255, 255, 255, 0.8); color: var(--white); font-size: 11px; letter-spacing: 0; }
.hero-poster figcaption { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }

.signal-strip { border-bottom: 1px solid var(--line); background: var(--cream); }
.signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.signal-grid > div { display: grid; grid-template-columns: auto 1fr; column-gap: 11px; padding: 22px 18px; border-right: 1px solid var(--line); }
.signal-grid > div:first-child { border-left: 1px solid var(--line); }
.signal-grid > div { transition: background 180ms ease, box-shadow 180ms ease, transform 180ms ease; }
.signal-grid > div:hover { position: relative; z-index: 1; background: var(--paper); box-shadow: 0 10px 22px rgba(27, 42, 74, 0.08); transform: translateY(-3px); }
.signal-icon { grid-row: span 2; color: var(--coral); font-family: Georgia, serif; font-size: 20px; }
.signal-grid strong { color: var(--ink); font-size: 15px; }
.signal-grid small { color: var(--muted); font-size: 13px; }

.content-section { padding: 112px 0; }
.content-section-tint { background: var(--paper); }
.split-layout { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 100px; }
.section-heading { position: relative; }
.section-heading h2 { margin-bottom: 12px; }
.section-heading.centered { text-align: center; }
.section-heading.centered .section-kicker { justify-content: center; }
.heading-note { margin: 0; color: var(--coral); font-family: Georgia, serif; font-size: 17px; }
.intro-visual { margin: 34px 0 0; }
.intro-visual img { width: 100%; aspect-ratio: 16 / 7.5; object-fit: cover; object-position: center; border: 1px solid rgba(255, 127, 80, 0.34); box-shadow: 0 18px 38px rgba(27, 42, 74, 0.12); transition: transform 220ms ease, box-shadow 220ms ease; }
.intro-visual:hover img { transform: translateY(-4px) scale(1.012); box-shadow: 0 24px 48px rgba(27, 42, 74, 0.18); }
.intro-visual figcaption { margin-top: 10px; color: var(--muted); font-family: Georgia, serif; font-size: 15px; }
.prose-block { max-width: 720px; }
.prose-block p, .guide-intro { margin: 0 0 22px; color: var(--muted); font-size: 17px; }
.prose-block .lead-paragraph { color: var(--ink-soft); font-size: 21px; line-height: 1.8; }
.feature-layout { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 72px; align-items: start; margin-top: 62px; }
.image-card { margin: 0; }
.image-card-tall img { aspect-ratio: 2 / 3; width: 100%; object-fit: cover; object-position: center top; box-shadow: var(--shadow); }
.image-card-tall { transition: transform 220ms ease, filter 220ms ease; }
.image-card-tall:hover { transform: translateY(-6px); filter: drop-shadow(0 16px 20px rgba(27, 42, 74, 0.12)); }
.image-card figcaption { margin-top: 12px; color: var(--muted); font-family: Georgia, serif; font-size: 15px; }
.content-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 34px; }
.content-list article { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 22px 0; border-top: 1px solid var(--line); }
.content-list article { transition: border-color 180ms ease, transform 180ms ease, background 180ms ease; }
.content-list article:hover { border-color: var(--coral); background: rgba(255, 183, 178, 0.1); transform: translateX(4px); }
.content-list article > span { color: var(--coral); font-family: Georgia, serif; font-size: 15px; }
.content-list h3 { margin-bottom: 7px; font-size: 20px; }
.content-list p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.75; }

.guide-section { background: var(--ink); color: rgba(255, 255, 255, 0.74); }
.guide-section h2, .guide-section .heading-note { color: var(--white); }
.guide-section .section-kicker { color: var(--gold); }
.guide-grid { display: grid; grid-template-columns: 0.65fr 1.35fr; gap: 82px; }
.guide-intro { margin-top: 28px; color: rgba(255, 255, 255, 0.72); }
.text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; border-bottom: 1px solid var(--gold); color: var(--gold); font-size: 15px; }
.guide-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2px; background: rgba(255, 255, 255, 0.15); }
.guide-card { padding: 24px; background: var(--ink); }
.guide-card { position: relative; overflow: hidden; transition: background 200ms ease, transform 200ms ease, box-shadow 200ms ease; }
.guide-card::after { position: absolute; top: 0; right: 0; width: 46px; height: 46px; border-right: 1px solid rgba(230, 184, 99, 0.45); border-top: 1px solid rgba(230, 184, 99, 0.45); content: ""; opacity: 0; transform: translate(12px, -12px); transition: opacity 200ms ease, transform 200ms ease; }
.guide-card:hover { z-index: 1; background: #23365e; box-shadow: 0 16px 28px rgba(0, 0, 0, 0.18); transform: translateY(-4px); }
.guide-card:hover::after { opacity: 1; transform: translate(0, 0); }
.guide-card-index { display: block; margin-bottom: 24px; color: var(--gold); font-family: Georgia, serif; font-size: 14px; }
.guide-card h3 { margin-bottom: 8px; color: var(--white); font-size: 19px; }
.guide-card p { margin: 0; color: rgba(255, 255, 255, 0.72); font-size: 15px; line-height: 1.75; }

.gallery-section { padding: 94px 0; background: var(--paper-deep); }
.gallery-header { margin-bottom: 30px; }
.gallery-layout { display: grid; grid-template-columns: minmax(0, 1.8fr) minmax(260px, 1fr); gap: 22px; align-items: start; }
.gallery-main { min-width: 0; margin: 0; }
.gallery-main-frame { overflow: hidden; aspect-ratio: 16 / 9; background: var(--ink); box-shadow: var(--shadow); }
.gallery-main-frame { transition: box-shadow 220ms ease, transform 220ms ease; }
.gallery-main-frame:hover { box-shadow: 0 28px 58px rgba(27, 42, 74, 0.2); transform: translateY(-4px); }
.gallery-main-frame img { width: 100%; height: 100%; object-fit: contain; transition: transform 420ms ease; }
.gallery-main-frame:hover img { transform: scale(1.025); }
.gallery-main figcaption { margin-top: 13px; color: var(--ink); font-family: Georgia, serif; font-size: 16px; }
.gallery-thumbs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.gallery-thumb { display: block; overflow: hidden; min-width: 0; padding: 0; border: 2px solid transparent; background: var(--cream); cursor: pointer; transition: border-color 180ms ease, opacity 180ms ease, transform 180ms ease; }
.gallery-thumb img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; opacity: 0.78; transition: opacity 180ms ease; }
.gallery-thumb:hover, .gallery-thumb:focus-visible { border-color: var(--coral); transform: translateY(-2px); }
.gallery-thumb:hover img, .gallery-thumb:focus-visible img, .gallery-thumb.is-active img { opacity: 1; }
.gallery-thumb.is-active { border-color: var(--coral); }

.features-section { background: var(--cream); }
.feature-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 60px; background: var(--line); }
.feature-cards article { min-height: 210px; padding: 30px; background: var(--cream); }
.feature-cards article { position: relative; overflow: hidden; transition: background 200ms ease, transform 200ms ease, box-shadow 200ms ease; }
.feature-cards article::after { position: absolute; right: 20px; bottom: 18px; width: 30px; height: 30px; border-right: 1px solid var(--coral); border-bottom: 1px solid var(--coral); content: ""; opacity: 0; transform: translate(8px, 8px); transition: opacity 200ms ease, transform 200ms ease; }
.feature-cards article:hover { z-index: 1; background: var(--white); box-shadow: 0 14px 30px rgba(27, 42, 74, 0.1); transform: translateY(-5px); }
.feature-cards article:hover::after { opacity: 1; transform: translate(0, 0); }
.feature-icon { display: block; margin-bottom: 18px; color: var(--coral); font-family: Georgia, serif; font-size: 24px; }
.feature-cards h3 { margin-bottom: 9px; font-size: 20px; }
.feature-cards p { margin: 0; color: var(--muted); font-size: 16px; }

.updates-section { background: var(--paper); }
.updates-grid { display: grid; grid-template-columns: 1fr; gap: 48px; }
.updates-grid > .section-heading { text-align: center; }
.updates-grid > .section-heading .section-kicker { justify-content: center; }
.timeline { position: relative; display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.timeline::before { position: absolute; top: 15px; bottom: 15px; left: 81px; width: 1px; background: var(--line); content: ""; }
.timeline li { position: relative; display: grid; grid-template-columns: 66px 1fr; gap: 34px; padding: 0 0 32px; }
.timeline li { transition: transform 180ms ease; }
.timeline li:hover { transform: translateX(6px); }
.timeline li::before { position: absolute; top: 9px; left: 76px; width: 10px; height: 10px; border: 2px solid var(--paper); border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 0 rgba(255, 127, 80, 0.35); content: ""; transform: scale(0.65); transition: transform 180ms ease, box-shadow 180ms ease; }
.timeline li:hover::before { transform: scale(1); box-shadow: 0 0 0 6px rgba(255, 127, 80, 0.14); }
.timeline-version { position: relative; z-index: 1; padding-top: 5px; color: var(--coral); font-family: Georgia, serif; font-size: 15px; }
.timeline h3 { margin-bottom: 5px; font-size: 20px; }
.timeline p { margin: 0; color: var(--muted); font-size: 16px; }

.faq-section { background: var(--cream); }
.faq-grid { display: grid; grid-template-columns: 1fr; gap: 48px; }
.faq-grid > .section-heading { text-align: center; }
.faq-grid > .section-heading .section-kicker { justify-content: center; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details { transition: background 180ms ease, border-color 180ms ease; }
.faq-list details:hover { border-color: rgba(255, 127, 80, 0.55); background: rgba(255, 183, 178, 0.1); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 20px 38px 20px 0; color: var(--ink); font-family: Georgia, serif; font-size: 20px; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; top: 18px; right: 4px; color: var(--coral); content: "+"; font-family: Arial, sans-serif; font-size: 22px; font-weight: 300; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list summary::after { transition: transform 180ms ease, color 180ms ease; }
.faq-list summary:hover { color: #c94f2d; }
.faq-list summary:hover::after { transform: rotate(90deg); }
.faq-list details p { max-width: 820px; margin: -3px 0 20px; color: var(--muted); font-size: 16px; }

.floating-detail-button { position: fixed; right: 24px; bottom: 24px; z-index: 9; min-width: 138px; background: var(--ink); box-shadow: 0 12px 30px rgba(27, 42, 74, 0.3); animation: detail-float 3.2s ease-in-out infinite; }
.floating-detail-button:hover, .floating-detail-button:focus-visible { background: #25395f; box-shadow: 0 18px 38px rgba(27, 42, 74, 0.4); animation-play-state: paused; }

@keyframes detail-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

.friends-section { padding: 58px 0 62px; background: linear-gradient(120deg, rgba(232, 197, 229, 0.78), rgba(255, 183, 178, 0.72)); }
.friends-inner { display: flex; align-items: center; flex-direction: column; }
.friends-inner h2 { color: var(--ink); font-size: 34px; text-align: center; }
.friends-rule { display: block; width: 78px; height: 4px; margin: 12px 0 30px; border-radius: 99px; background: var(--coral); }
.friends-links { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 16px; width: 100%; }
.friends-links a { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 10px 24px; border: 1px solid rgba(255, 127, 80, 0.2); border-radius: 999px; background: rgba(255, 255, 255, 0.72); box-shadow: 0 8px 20px rgba(27, 42, 74, 0.08); color: var(--ink-soft); font-size: 16px; font-weight: 600; text-align: center; transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease, background 180ms ease, color 180ms ease; }
.friends-links a:hover, .friends-links a:focus-visible { border-color: rgba(255, 127, 80, 0.62); background: var(--white); box-shadow: 0 12px 26px rgba(27, 42, 74, 0.14); color: var(--ink); transform: translateY(-3px); outline: none; }

.site-footer { padding: 28px 0; background: var(--ink); color: rgba(255, 255, 255, 0.64); font-size: 13px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-inner p { margin: 0; }

@media (max-width: 980px) {
  .main-nav { gap: 5px; font-size: 13px; }
  .split-layout, .guide-grid { gap: 52px; }
  .feature-layout { gap: 38px; }
}

@media (max-width: 900px) {
  body { overflow-x: hidden; }
  .container { width: min(100% - 32px, 600px); }
  .header-inner { min-height: 68px; }
  .menu-toggle { display: grid; cursor: pointer; }
  .main-nav { position: fixed; top: 68px; right: 0; left: 0; display: grid; gap: 0; padding: 12px 16px 22px; background: var(--cream); box-shadow: 0 20px 30px rgba(27, 42, 74, 0.12); opacity: 0; pointer-events: none; transform: translateY(-10px); transition: opacity 180ms ease, transform 180ms ease; }
  .main-nav.is-open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .main-nav a { padding: 12px 8px !important; border-bottom: 1px solid var(--line); }
  .main-nav a:not(.nav-cta)::after { display: none; }
  .nav-cta { margin-top: 12px; border-bottom: 0 !important; text-align: center; }
  .hero { min-height: 690px; padding: 52px 0; }
  .hero-grid { min-height: 586px; }
  .hero-copy { width: 100%; }
  .hero-poster { top: -52px; bottom: -52px; }
  .poster-frame img { object-position: 62% center; }
  .poster-frame::after { background: rgba(244, 240, 234, 0.84); }
  .hero-grid, .split-layout, .feature-layout, .guide-grid, .updates-grid, .faq-grid { grid-template-columns: 1fr; }
  .intro-visual img { aspect-ratio: 16 / 9; }
  h1 { font-size: 42px; }
  h2 { font-size: 34px; }
  .hero-lead { font-size: 19px; }
  .hero-facts { gap: 13px; }
  .hero-facts div { min-width: 0; flex: 1 1 140px; }
  .signal-grid { grid-template-columns: repeat(2, 1fr); }
  .signal-grid > div:nth-child(3) { border-left: 1px solid var(--line); }
  .signal-grid > div:nth-child(3), .signal-grid > div:nth-child(4) { border-top: 1px solid var(--line); }
  .content-section { padding: 74px 0; }
  .split-layout, .guide-grid { gap: 34px; }
  .updates-grid, .faq-grid { gap: 30px; }
  .content-list, .guide-cards, .feature-cards { grid-template-columns: 1fr; }
  .gallery-section { padding: 70px 0; }
  .gallery-layout { grid-template-columns: 1fr; gap: 18px; }
  .gallery-thumbs { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .floating-detail-button { right: 16px; bottom: 16px; min-width: 128px; min-height: 46px; padding: 9px 18px; }
  .friends-section { padding: 52px 0 56px; }
  .friends-inner h2 { font-size: 32px; }
  .friends-links { gap: 12px; }
  .friends-links a { width: 100%; padding: 11px 16px; }
}

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