:root {
  --bg: #0b0b0f;
  --bg-soft: #14141c;
  --bg-card: #1a1a24;
  --line: rgba(255, 255, 255, 0.08);
  --text: #f2f2f5;
  --muted: #a3a3b5;
  --brand: #e11d48;
  --brand-soft: #fb7185;
  --accent: #f43f5e;
  --ok: #34d399;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --max: 1180px;
  --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(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(225, 29, 72, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(244, 63, 94, 0.12), transparent 50%),
    linear-gradient(180deg, #0d0d14 0%, var(--bg) 40%, #09090d 100%);
  line-height: 1.75;
  min-height: 100vh;
}

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

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

a:hover {
  color: #fff;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--brand);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(11, 11, 15, 0.82);
  border-bottom: 1px solid var(--line);
}

.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: #fff;
  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;
  align-items: center;
  gap: 0.35rem;
}

.nav a {
  color: var(--muted);
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  font-size: 0.95rem;
}

.nav a:hover,
.nav a.active {
  color: #fff;
  background: rgba(225, 29, 72, 0.16);
}

.menu-toggle {
  display: none;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  border-radius: 8px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  content: "";
  display: block;
  width: 16px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
  position: absolute;
  left: 50%;
  margin-left: -8px;
}

.menu-toggle::before { top: 10px; }
.menu-toggle span { top: 16px; }
.menu-toggle::after { top: 22px; }

.menu-toggle[aria-expanded="true"]::before {
  top: 16px;
  transform: rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"]::after {
  top: 16px;
  transform: rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 4.5rem 0 3.2rem;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(11, 11, 15, 0.92) 0%, rgba(11, 11, 15, 0.55) 48%, rgba(11, 11, 15, 0.35) 100%),
    url("/a.jpg") center / cover no-repeat;
  z-index: -1;
  transform: scale(1.02);
  animation: heroDrift 18s ease-in-out infinite alternate;
}

@keyframes heroDrift {
  from { transform: scale(1.02) translateY(0); }
  to { transform: scale(1.08) translateY(-1.5%); }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: center;
}

.hero-copy h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.25;
  font-weight: 400;
}

.hero-copy .lead {
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 36rem;
  margin-bottom: 1.6rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--brand), #be123c);
  color: #fff;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line);
  color: #fff;
}

.hero-phone {
  justify-self: end;
  width: min(100%, 320px);
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
  animation: floatUp 0.9s ease both;
}

.hero-phone img {
  width: 100%;
}

@keyframes floatUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Sections */
.section {
  padding: 3.5rem 0;
}

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

.section-head h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 400;
}

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

.kicker {
  display: inline-block;
  color: var(--brand-soft);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

/* Feature / category grids */
.grid-3,
.grid-4,
.grid-2 {
  display: grid;
  gap: 1.1rem;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(225, 29, 72, 0.35);
}

.card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
  background: #111;
}

.card.wide img {
  aspect-ratio: 16 / 10;
}

.card-body {
  padding: 1rem 1.05rem 1.2rem;
}

.card-body h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

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

/* Content blocks */
.prose {
  color: #d6d6e0;
  font-size: 1.02rem;
}

.prose h2,
.prose h3 {
  color: #fff;
  font-family: var(--font-display);
  font-weight: 400;
  margin-top: 2rem;
}

.prose h2 { font-size: 1.7rem; }
.prose h3 { font-size: 1.25rem; }

.prose p {
  margin: 0.9rem 0;
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
  color: var(--muted);
}

.prose li {
  margin: 0.4rem 0;
}

.prose strong {
  color: #fff;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: center;
}

.split .media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

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

.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.badge-list li a,
.badge-list li span {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(225, 29, 72, 0.12);
  border: 1px solid rgba(225, 29, 72, 0.25);
  color: #fecdd3;
  font-size: 0.88rem;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 1rem;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.1rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
}

.faq details {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.95rem 1.1rem;
  margin-bottom: 0.7rem;
}

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

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

.note {
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--brand);
  background: rgba(225, 29, 72, 0.08);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--muted);
}

.page-hero {
  padding: 2.8rem 0 1.5rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.5rem;
}

.page-hero h1 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 400;
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 44rem;
}

.legal {
  padding-bottom: 3.5rem;
}

.crumbs {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
}

.crumbs a { color: var(--muted); }
.crumbs a:hover { color: #fff; }

.related {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.related ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0;
}

.related a {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #fff;
  background: rgba(255, 255, 255, 0.03);
}

/* Error pages */
.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, 5.5rem);
  margin: 0;
  color: var(--brand-soft);
}

.error-page p {
  color: var(--muted);
  max-width: 28rem;
  margin: 0.8rem auto 1.5rem;
}

/* Footer */
.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.35);
  padding: 2.5rem 0 1.5rem;
}

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

.site-footer h3 {
  margin: 0 0 0.8rem;
  font-size: 1rem;
}

.site-footer p,
.site-footer a {
  color: var(--muted);
  font-size: 0.92rem;
}

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

.site-footer li { margin: 0.35rem 0; }

.copyright {
  margin-top: 1.8rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: #7c7c8f;
  font-size: 0.85rem;
  text-align: center;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* Responsive */
@media (max-width: 980px) {
  .hero-grid,
  .split,
  .grid-3,
  .grid-4,
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .menu-toggle { display: inline-flex; }

  .nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    padding: 0.8rem;
    background: rgba(12, 12, 18, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .nav.open { display: flex; }

  .nav a {
    padding: 0.75rem 0.9rem;
    border-radius: 10px;
  }

  .hero {
    padding: 2.4rem 0 2rem;
  }

  .hero-grid,
  .split,
  .grid-2,
  .grid-3,
  .grid-4,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-phone {
    justify-self: center;
    width: min(100%, 280px);
  }

  .hero::before {
    background:
      linear-gradient(180deg, rgba(11, 11, 15, 0.88) 20%, rgba(11, 11, 15, 0.96) 100%),
      url("/a.jpg") center / cover no-repeat;
  }

  .card img {
    aspect-ratio: 3 / 4;
  }

  .section {
    padding: 2.4rem 0;
  }
}