@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@400;500;600;700&family=Quicksand:wght@300;400;500;600;700&display=swap');

/* ===== 基础变量 ===== */
:root {
  --c-dark: #1a1a2e;
  --c-red: #e94560;
  --c-gold: #f5a623;
  --c-dark-soft: #16213e;
  --c-dark-mid: #0f3460;
  --c-red-dim: rgba(233,69,96,0.15);
  --c-gold-dim: rgba(245,166,35,0.12);
  --c-text: #f0e6d3;
  --c-text-muted: #a89880;
  --c-text-dim: #7a6e62;
  --nav-h: 64px;
  --radius-pill: 24px;
  --shadow-soft: 0 4px 24px rgba(0,0,0,0.35);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --font-hand: 'Caveat', cursive;
  --font-body: 'Quicksand', system-ui, sans-serif;
  --transition-base: 0.3s cubic-bezier(0.4,0,0.2,1);
  --scroll-offset: 80px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 17px;
  background: var(--c-dark);
  color: var(--c-text);
}

body {
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
  background: var(--c-dark);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ===== scroll-margin for anchors ===== */
section[id] {
  scroll-margin-top: var(--scroll-offset);
}

/* ===== Page Wrapper ===== */
.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Bottom Nav Aside ===== */
.bottom-nav-aside {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26,26,46,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid rgba(233,69,96,0.25);
  box-shadow: 0 -4px 24px rgba(0,0,0,0.5);
}

.bottom-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 12px;
  height: var(--nav-h);
  gap: 8px;
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
}

.nav-right {
  justify-content: flex-end;
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--c-text-muted);
  background: transparent;
  border: 1px solid transparent;
  transition: color var(--transition-base), background var(--transition-base), border-color var(--transition-base);
  white-space: nowrap;
  min-height: 40px;
}

.nav-pill:hover,
.nav-pill:focus-visible {
  color: var(--c-gold);
  background: var(--c-gold-dim);
  border-color: rgba(245,166,35,0.3);
  outline: none;
}

.brand-center {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
}

.brand-logo {
  height: 36px;
  width: auto;
}

.brand-text {
  font-family: var(--font-hand);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-red);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  padding-bottom: calc(var(--nav-h) + 16px);
}

.story-article {
  width: 100%;
}

/* ===== Hero Section ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background: var(--c-dark);
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(233,69,96,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(233,69,96,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: 0;
  pointer-events: none;
}

.hero-bg-grid::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 60% 50%, rgba(26,26,46,0) 0%, var(--c-dark) 80%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 48px 80px;
  width: 100%;
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}

.hero-h1 {
  font-family: var(--font-hand);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--c-text);
  letter-spacing: 0.02em;
}

.hero-h1 em {
  color: var(--c-red);
  font-style: normal;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--c-text-muted);
  line-height: 1.8;
  max-width: 420px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  padding: 14px 32px;
  background: var(--c-red);
  color: #fff;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  box-shadow: 0 4px 20px rgba(233,69,96,0.4);
  min-height: 48px;
}

.hero-cta:hover {
  background: #ff5570;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(233,69,96,0.55);
}

.hero-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-img {
  width: 100%;
  max-width: 480px;
  border-radius: 2px;
  box-shadow: var(--shadow-card);
  position: relative;
  z-index: 1;
}

.hero-deco {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.deco-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid;
  opacity: 0.18;
}

.deco-ring-1 {
  width: 300px; height: 300px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-color: var(--c-red);
  animation: ring-pulse 4s ease-in-out infinite;
}

.deco-ring-2 {
  width: 420px; height: 420px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-color: var(--c-gold);
  animation: ring-pulse 4s ease-in-out 1.3s infinite;
}

.deco-ring-3 {
  width: 540px; height: 540px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-color: var(--c-red);
  animation: ring-pulse 4s ease-in-out 2.6s infinite;
}

@keyframes ring-pulse {
  0%, 100% { opacity: 0.1; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.25; transform: translate(-50%, -50%) scale(1.04); }
}

.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
  opacity: 0.5;
}

.scroll-hint-line {
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--c-gold), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0%, 100% { transform: scaleY(1); opacity: 0.5; }
  50% { transform: scaleY(0.6); opacity: 1; }
}

.scroll-hint-text {
  font-size: 0.72rem;
  color: var(--c-gold);
  font-family: var(--font-body);
  letter-spacing: 0.08em;
  writing-mode: horizontal-tb;
}

/* ===== Parallax Layer ===== */
.parallax-layer {
  will-change: transform;
}

/* ===== Content Section ===== */
.content-section {
  background: var(--c-dark);
  padding: 48px 24px 80px;
}

.content-with-aside {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
  align-items: start;
}

.content-main {
  min-width: 0;
}

/* ===== Page Content Sections ===== */
.content-main section {
  padding: 64px 0;
  border-bottom: 1px solid rgba(233,69,96,0.12);
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.content-main section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.content-main section:last-child {
  border-bottom: none;
}

.content-main h1,
.content-main h2,
.content-main h3,
.content-main h4 {
  font-family: var(--font-hand);
  line-height: 1.3;
  color: var(--c-text);
}

.content-main h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--c-gold);
}

.content-main h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--c-text);
}

.content-main h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--c-red);
}

.content-main p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-text-muted);
  margin-bottom: 16px;
}

.content-main ul,
.content-main ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.content-main li {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text-muted);
  margin-bottom: 6px;
}

.content-main ul li::marker { color: var(--c-red); }
.content-main ol li::marker { color: var(--c-gold); }

.content-main small {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-red);
  text-transform: uppercase;
  margin-bottom: 8px;
  font-family: var(--font-body);
}

.content-main a {
  color: var(--c-gold);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}

.content-main a:hover {
  border-bottom-color: var(--c-gold);
}

/* ===== Aside ===== */
.content-aside {
  position: sticky;
  top: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.aside-card {
  background: var(--c-dark-soft);
  border: 1px solid rgba(233,69,96,0.18);
  border-radius: 2px;
  padding: 24px;
  box-shadow: var(--shadow-soft);
  transition: box-shadow var(--transition-base);
}

.aside-card:hover {
  box-shadow: var(--shadow-card);
}

.aside-card-accent {
  border-color: rgba(245,166,35,0.25);
  background: linear-gradient(135deg, var(--c-dark-soft) 0%, rgba(245,166,35,0.05) 100%);
}

.aside-eyebrow {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-red);
  text-transform: uppercase;
  margin-bottom: 8px;
  font-family: var(--font-body);
}

.aside-title {
  font-family: var(--font-hand);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 14px;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aside-link {
  display: block;
  font-size: 0.88rem;
  color: var(--c-text-muted);
  padding: 8px 10px;
  border-radius: 2px;
  border-left: 2px solid transparent;
  transition: color var(--transition-base), border-color var(--transition-base), background var(--transition-base);
  min-height: 40px;
  display: flex;
  align-items: center;
}

.aside-link:hover {
  color: var(--c-gold);
  border-left-color: var(--c-gold);
  background: var(--c-gold-dim);
}

.aside-note {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--c-text-dim);
}

/* ===== Footer ===== */
.site-footer {
  background: rgba(10,10,20,0.95);
  border-top: 1px solid rgba(233,69,96,0.15);
  padding: 24px 24px calc(var(--nav-h) + 24px);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer-brand {
  font-family: var(--font-hand);
}

.footer-brand small {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-red);
  letter-spacing: 0.04em;
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--c-text-dim);
  line-height: 1.6;
  letter-spacing: 0.03em;
}

/* ===== Intersection Observer Trigger ===== */
.observe-me {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.observe-me.is-visible {
  opacity: 1;
  transform: none;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .content-with-aside {
    grid-template-columns: 1fr;
  }

  .content-aside {
    position: static;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    padding: 72px 24px 60px;
    gap: 32px;
    text-align: left;
  }

  .hero-media {
    display: none;
  }

  .hero-h1 {
    font-size: clamp(1.9rem, 7vw, 2.8rem);
  }
}

@media (max-width: 600px) {
  :root {
    --nav-h: 60px;
    --scroll-offset: 70px;
  }

  .bottom-nav {
    padding: 0 6px;
    gap: 4px;
  }

  .nav-pill {
    padding: 10px 10px;
    font-size: 0.75rem;
    min-height: 40px;
  }

  .hero-inner {
    padding: 60px 20px 40px;
  }

  .content-section {
    padding: 32px 16px 60px;
  }

  .content-main section {
    padding: 44px 0;
  }

  .aside-card {
    padding: 18px;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .content-main section {
    opacity: 1;
    transform: none;
  }

  .observe-me {
    opacity: 1;
    transform: none;
  }

  .deco-ring { animation: none; }
  .scroll-hint-line { animation: none; }
}

button[aria-expanded]{min-width:44px;min-height:44px}