:root {
  --brand: #e11d48;
  --brand-dark: #be123c;
  --brand-soft: #fff1f2;
  --ink: #1c1917;
  --ink-soft: #44403c;
  --muted: #78716c;
  --line: #e7e5e4;
  --bg: #fafaf9;
  --surface: #ffffff;
  --accent: #0d9488;
  --shadow: 0 12px 40px rgba(28, 25, 23, 0.08);
  --radius: 14px;
  --max: 1120px;
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #ffe4e6 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #ccfbf1 0%, transparent 45%),
    var(--bg);
  line-height: 1.75;
  font-size: 16px;
}

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

a {
  color: var(--brand-dark);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(250, 250, 249, 0.86);
  border-bottom: 1px solid rgba(231, 229, 228, 0.8);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  align-items: center;
}

.nav a {
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover,
.nav a.active {
  color: var(--brand);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: min(88vh, 760px);
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  animation: drift 18s ease-in-out infinite alternate;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(28, 25, 23, 0.25) 0%, rgba(28, 25, 23, 0.72) 68%, rgba(28, 25, 23, 0.9) 100%),
    linear-gradient(90deg, rgba(190, 18, 60, 0.35), transparent 55%);
}

.hero-inner {
  padding: 4.5rem 0 3.2rem;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.15;
  margin: 0 0 0.85rem;
  letter-spacing: 0.04em;
  animation: rise 0.8s ease both;
}

.hero h1 {
  margin: 0 0 0.9rem;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 600;
  max-width: 36ch;
  animation: rise 0.9s ease 0.08s both;
}

.hero p {
  margin: 0 0 1.5rem;
  max-width: 42ch;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.05rem;
  animation: rise 1s ease 0.15s both;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 1.05s ease 0.22s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.78rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 24px rgba(225, 29, 72, 0.35);
}

.btn-primary:hover {
  background: var(--brand-dark);
  color: #fff;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
  backdrop-filter: blur(6px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-head {
  margin-bottom: 1.8rem;
  max-width: 48rem;
}

.section-head h2 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  letter-spacing: 0.03em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.prose {
  color: var(--ink-soft);
}

.prose p {
  margin: 0 0 1.05rem;
}

.prose h3 {
  margin: 1.8rem 0 0.7rem;
  font-size: 1.28rem;
  color: var(--ink);
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
  margin: 0 0 1.1rem;
}

.prose li {
  margin-bottom: 0.45rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1.5rem;
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.media-block {
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--surface);
}

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

.media-wide img {
  aspect-ratio: 16 / 10;
  max-height: none;
}

.tile {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.tile img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 320px;
}

.tile-body {
  padding: 0.9rem 1rem 1.05rem;
}

.tile-body h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.tile-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.feature-list {
  display: grid;
  gap: 0.9rem;
}

.feature-item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 0.9rem;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.7rem;
}

.feature-item img {
  width: 88px;
  height: 120px;
  object-fit: cover;
  border-radius: 10px;
}

.feature-item h3 {
  margin: 0 0 0.3rem;
  font-size: 1.05rem;
}

.feature-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.band {
  background: linear-gradient(135deg, #fff1f2 0%, #ffffff 45%, #f0fdfa 100%);
  border-block: 1px solid var(--line);
}

.pill-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.pill-links a {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 0.9rem;
  border: 1px solid #fecdd3;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  margin-bottom: 0.7rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq p {
  margin: 0.7rem 0 0;
  color: var(--muted);
}

.page-hero {
  padding: 3rem 0 1.5rem;
}

.page-hero h1 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 48rem;
}

.content-page {
  padding: 0 0 4rem;
}

.content-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem;
  box-shadow: var(--shadow);
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 1rem;
}

.error-page h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 5rem);
  margin: 0 0 0.4rem;
  color: var(--brand);
}

.error-page p {
  color: var(--muted);
  margin: 0 0 1.4rem;
}

.site-footer {
  background: #1c1917;
  color: #d6d3d1;
  padding: 2.6rem 0 1.6rem;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
}

.site-footer h3 {
  margin: 0 0 0.7rem;
  color: #fff;
  font-size: 1rem;
}

.site-footer a {
  color: #d6d3d1;
}

.site-footer a:hover {
  color: #fda4af;
}

.footer-links {
  display: grid;
  gap: 0.4rem;
}

.copyright {
  margin-top: 1.6rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.88rem;
  color: #a8a29e;
}

.toc {
  background: var(--brand-soft);
  border: 1px solid #fecdd3;
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1.4rem;
}

.toc h2 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
}

.toc ol {
  margin: 0;
  padding-left: 1.15rem;
}

.toc a {
  color: var(--brand-dark);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  from {
    transform: scale(1.02) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.08) translate3d(-1.5%, -1%, 0);
  }
}

@media (max-width: 960px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-2,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: 68px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.8rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 0.55rem 0.6rem;
    border-radius: 8px;
  }

  .nav a:hover {
    background: var(--brand-soft);
  }

  .hero {
    min-height: 72vh;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }

  .feature-item {
    grid-template-columns: 72px 1fr;
  }

  .feature-item img {
    width: 72px;
    height: 96px;
  }

  section {
    padding: 3rem 0;
  }
}

@media (max-width: 420px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .tile img,
  .media-block img {
    max-height: 420px;
  }
}