:root {
  --bg: #080807;
  --bg-2: #12110f;
  --ink: #f3eee4;
  --muted: #9c958a;
  --gold: #c9a84c;
  --gold-soft: #e2c778;
  --line: rgba(201, 168, 76, 0.22);
  --shadow: 0 40px 90px rgba(0, 0, 0, 0.55);
  --serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans: "Outfit", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --max: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.65;
  background:
    radial-gradient(1200px 700px at 70% -10%, rgba(201, 168, 76, 0.16), transparent 55%),
    radial-gradient(900px 600px at 10% 20%, rgba(90, 70, 40, 0.22), transparent 50%),
    linear-gradient(180deg, #0b0a08 0%, var(--bg) 40%, #0a0a09 100%);
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 4vw, 40px);
  background: linear-gradient(180deg, rgba(8, 8, 7, 0.92), rgba(8, 8, 7, 0));
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 0.18em;
  font-size: 15px;
}

.brand-mark img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
}

.top-cta {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, color 0.25s ease;
}

.top-cta:hover {
  border-color: var(--gold);
  color: var(--ink);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: end;
  gap: clamp(24px, 4vw, 56px);
  padding:
    clamp(96px, 14vh, 140px)
    clamp(20px, 5vw, 64px)
    clamp(40px, 7vh, 72px);
  max-width: 1280px;
  margin: 0 auto;
}

.hero-atmosphere {
  position: absolute;
  inset: 8% 0 auto auto;
  width: min(58vw, 720px);
  height: min(78vh, 820px);
  background:
    radial-gradient(ellipse at 50% 40%, rgba(201, 168, 76, 0.18), transparent 62%),
    radial-gradient(ellipse at 60% 80%, rgba(40, 36, 28, 0.9), transparent 70%);
  filter: blur(8px);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 2;
  padding-bottom: clamp(12px, 4vh, 48px);
  animation: rise 1s ease both;
}

.hero-seal {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.34em;
  color: var(--gold);
  font-weight: 500;
}

.hero-brand {
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(64px, 11vw, 120px);
  line-height: 1;
  letter-spacing: 0.12em;
  text-indent: 0.12em;
  background: linear-gradient(180deg, #fff8e8 10%, var(--gold-soft) 55%, #8a7340 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-line {
  margin: 22px 0 0;
  font-family: var(--serif);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 500;
  letter-spacing: 0.18em;
}

.hero-sub {
  margin: 14px 0 0;
  max-width: 28ch;
  color: var(--muted);
  font-size: 16px;
  letter-spacing: 0.04em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn-gold,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.btn-gold {
  background: linear-gradient(180deg, var(--gold-soft), var(--gold));
  color: #14110a;
}

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

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.02);
}

.btn-ghost:hover {
  border-color: rgba(201, 168, 76, 0.55);
  color: var(--gold-soft);
}

.btn-icon { display: inline-flex; }

.hero-visual {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  animation: rise 1.15s 0.12s ease both;
}

.phone {
  width: min(100%, 320px);
  border-radius: 36px;
  overflow: hidden;
  border: 1px solid rgba(226, 199, 120, 0.28);
  box-shadow: var(--shadow), 0 0 0 10px rgba(20, 18, 14, 0.85);
  background: #000;
  animation: float 7s ease-in-out infinite;
}

.phone img {
  width: 100%;
  aspect-ratio: 390 / 844;
  object-fit: cover;
}

.phone-sm {
  width: min(100%, 280px);
  border-radius: 30px;
  animation: none;
}

.band {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(72px, 12vh, 120px) clamp(20px, 5vw, 40px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 6vw, 80px);
  align-items: center;
}

.band-flip .band-text { order: 2; }
.band-flip .band-visual { order: 1; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.band h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.25;
  letter-spacing: 0.08em;
}

.band-text p:last-child {
  margin: 16px 0 0;
  color: var(--muted);
  max-width: 34ch;
  font-size: 16px;
}

.band-visual {
  display: flex;
  justify-content: center;
}

.band-visual.stack {
  position: relative;
  min-height: 420px;
}

.phone-offset {
  position: absolute;
  right: 8%;
  top: 12%;
  width: min(46%, 220px);
  opacity: 0.92;
  transform: rotate(6deg);
  z-index: 1;
}

.band-visual.stack .phone-sm:first-child {
  position: relative;
  z-index: 2;
  margin-right: 18%;
}

.gallery {
  padding: 20px 0 40px;
  overflow: hidden;
}

.gallery-track {
  display: flex;
  gap: 18px;
  width: max-content;
  padding: 10px clamp(20px, 5vw, 40px);
  animation: drift 36s linear infinite;
}

.gallery figure {
  margin: 0;
  width: 180px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  flex: none;
}

.gallery img {
  width: 100%;
  aspect-ratio: 390 / 844;
  object-fit: cover;
}

.closing {
  text-align: center;
  padding: clamp(80px, 14vh, 140px) 24px 90px;
}

.closing-icon {
  margin: 0 auto 22px;
  border-radius: 18px;
  box-shadow: 0 20px 50px rgba(201, 168, 76, 0.18);
}

.closing h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(36px, 6vw, 56px);
  letter-spacing: 0.18em;
  text-indent: 0.18em;
}

.closing p {
  margin: 12px 0 28px;
  color: var(--muted);
  letter-spacing: 0.16em;
}

.foot {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 28px clamp(20px, 5vw, 40px) 40px;
  max-width: var(--max);
  margin: 0 auto;
}

.foot-note {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
  max-width: 62ch;
}

.foot-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 18px 0 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(243, 238, 228, 0.55);
}

.foot-meta a:hover { color: var(--gold-soft); }

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

@keyframes rise {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes drift {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    align-items: start;
    min-height: auto;
    padding-top: 110px;
    padding-bottom: 48px;
  }

  .hero-visual {
    order: -1;
    min-height: 52vh;
  }

  .phone {
    width: min(58vw, 260px);
  }

  .hero-copy {
    text-align: center;
    padding-bottom: 0;
  }

  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }

  .band,
  .band-flip {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .band-flip .band-text,
  .band-flip .band-visual { order: unset; }

  .band-text p:last-child {
    margin-left: auto;
    margin-right: auto;
  }

  .band-visual.stack {
    min-height: 360px;
  }

  .band-visual.stack .phone-sm:first-child {
    margin-right: 0;
  }

  .phone-offset {
    right: 6%;
    top: 8%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .phone,
  .gallery-track,
  .hero-copy,
  .hero-visual { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* —— 导航 / 法律页 / 技术支持 —— */
.top-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.top-nav a {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(243, 238, 228, 0.72);
  transition: color 0.2s ease;
}

.top-nav a:hover,
.top-nav a[aria-current="page"] { color: var(--gold-soft); }

.top-nav .top-cta { margin-left: 4px; }

.support-section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px clamp(20px, 5vw, 40px) 40px;
}

.support-section .eyebrow {
  margin: 0 0 10px;
  color: var(--gold);
  letter-spacing: 0.28em;
  font-size: 12px;
}

.support-section h2 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: 0.12em;
}

.support-lead {
  margin: 0 0 28px;
  max-width: 48ch;
  color: var(--muted);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.support-card {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.02);
}

.support-card h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
}

.support-card p,
.support-card li {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.support-card ul {
  margin: 0;
  padding-left: 1.1em;
}

.support-card li + li { margin-top: 6px; }

.support-meta {
  margin-top: 28px;
  padding: 18px 20px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.support-meta strong { color: var(--ink); font-weight: 500; }

.legal-page {
  max-width: 820px;
  margin: 0 auto;
  padding: 110px clamp(20px, 4vw, 32px) 64px;
}

.legal-doc__header { margin-bottom: 18px; }

.legal-doc__title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(28px, 5vw, 40px);
  letter-spacing: 0.14em;
}

.legal-doc__meta {
  margin: 0 0 28px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(201, 168, 76, 0.06);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.legal-doc__meta p { margin: 0; }
.legal-doc__meta strong { color: var(--gold-soft); font-weight: 500; }

.legal-doc h2 {
  margin: 28px 0 12px;
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
}

.legal-doc h3 {
  margin: 18px 0 8px;
  font-size: 15px;
  color: var(--ink);
  font-weight: 600;
}

.legal-doc p,
.legal-doc li {
  margin: 0 0 12px;
  color: rgba(243, 238, 228, 0.82);
  font-size: 14.5px;
  line-height: 1.85;
}

.legal-doc ul,
.legal-doc ol {
  margin: 0 0 14px;
  padding-left: 1.25em;
}

.legal-doc li + li { margin-top: 6px; }

.legal-doc .toc {
  margin: 0 0 24px;
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.legal-doc .toc a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
}

.legal-doc .toc a:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--line);
}

.legal-doc .emph {
  color: var(--gold-soft);
  font-weight: 500;
}

.legal-back {
  display: inline-flex;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.legal-back:hover { color: var(--gold-soft); }

.foot-meta a + a::before,
.foot-links a + a::before {
  content: "·";
  margin: 0 10px 0 0;
  color: rgba(243, 238, 228, 0.28);
}

@media (max-width: 900px) {
  .support-grid { grid-template-columns: 1fr; }
  .top { flex-wrap: wrap; gap: 12px; }
  .top-nav { width: 100%; justify-content: flex-start; }
}