/* ============================================================
   NOIRST — 精品健身房
   高级暗色 · 黑金 · 衬线标题
   ============================================================ */
:root {
  --bg: #0a0a0c;
  --bg-2: #0f0f12;
  --panel: #141416;
  --line: rgba(255, 255, 255, .09);
  --line-2: rgba(255, 255, 255, .16);

  --text: #f2efe9;
  --text-2: rgba(242, 239, 233, .66);
  --text-3: rgba(242, 239, 233, .4);

  --gold: #c9a876;
  --gold-2: #e6cb9e;
  --gold-dim: rgba(201, 168, 118, .14);

  --serif: "Playfair Display", "Didot", "Times New Roman", "Songti SC", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;

  --max: 1200px;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; font-family: var(--serif); font-weight: 400; letter-spacing: -.01em; line-height: 1.1; }
p { margin: 0; }
svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

.shell { width: min(var(--max), 100% - 48px); margin-inline: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 48px; padding: 0 28px;
  font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  border: 1px solid transparent; border-radius: 2px;
  transition: all .25s var(--ease);
}
.btn-sm { height: 40px; padding: 0 20px; font-size: 12px; }
.btn-lg { height: 54px; padding: 0 36px; }
.btn-block { width: 100%; }

.btn-gold {
  color: #171310;
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -14px rgba(201, 168, 118, .8); }

.btn-line {
  color: var(--text);
  border-color: var(--line-2);
}
.btn-line:hover { border-color: var(--gold); color: var(--gold-2); }

/* ---------- 头部 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .35s ease, backdrop-filter .35s ease, border-color .35s ease;
  border-bottom: 1px solid transparent;
}
.header.scrolled {
  background: rgba(10, 10, 12, .82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom-color: var(--line);
}
.header-inner { height: 78px; display: flex; align-items: center; gap: 40px; }

.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark {
  width: 34px; height: 34px; display: grid; place-items: center;
  font-family: var(--serif); font-size: 17px; color: var(--gold-2);
  border: 1px solid var(--gold); border-radius: 50%;
}
.brand-name {
  font-family: var(--serif); font-size: 19px; letter-spacing: .26em; color: var(--text);
}

.nav { display: flex; gap: 34px; margin-left: auto; }
.nav a {
  font-size: 13px; letter-spacing: .06em; color: var(--text-2);
  transition: color .2s ease; position: relative;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 1px;
  background: var(--gold); transition: width .3s var(--ease);
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { width: 100%; }

.header-right { display: flex; align-items: center; gap: 14px; margin-left: auto; }

.lang-btn {
  display: inline-flex; align-items: center; gap: 5px;
  height: 34px; padding: 0 12px; border-radius: 2px;
  background: transparent; border: 1px solid var(--line-2);
  color: var(--text-3); font-size: 12px; font-weight: 600; letter-spacing: .06em;
  transition: all .25s ease;
}
.lang-btn:hover { border-color: var(--gold); color: var(--gold-2); }
.lang-cur { color: var(--gold-2); }
.lang-sep { opacity: .3; font-size: 11px; }
.lang-alt { opacity: .55; }
.lang-btn:hover .lang-alt { opacity: 1; }

.burger { display: none; width: 38px; height: 34px; background: none; border: 0; padding: 8px; }
.burger span { display: block; height: 1.5px; background: var(--text); margin-bottom: 7px; transition: .3s ease; }
.burger span:last-child { margin-bottom: 0; }

.mobile-nav {
  display: none; flex-direction: column;
  background: rgba(10, 10, 12, .97); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  max-height: 0; overflow: hidden; transition: max-height .4s var(--ease);
}
.mobile-nav.open { max-height: 320px; }
.mobile-nav a {
  padding: 16px 24px; font-size: 15px; color: var(--text-2);
  border-bottom: 1px solid var(--line);
}

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding: 130px 0 80px;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-glow {
  position: absolute; width: 900px; height: 900px;
  right: -300px; top: -300px; border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 168, 118, .16), transparent 62%);
  filter: blur(60px);
  animation: glowDrift 14s ease-in-out infinite alternate;
}
@keyframes glowDrift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-50px, 60px) scale(1.15); }
}
.hero-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .022) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 40%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 40%, #000, transparent 75%);
}
.hero-inner { position: relative; z-index: 1; max-width: 760px; }

.kicker {
  display: inline-flex; align-items: center; gap: 14px;
  font-size: 11.5px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 28px;
}
.kicker-line { width: 42px; height: 1px; background: var(--gold); display: block; }

.hero h1 {
  font-size: clamp(40px, 6.4vw, 82px);
  letter-spacing: -.02em; line-height: 1.06;
}
.gold {
  background: linear-gradient(100deg, var(--gold-2), var(--gold) 50%, #a8875a);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-sub {
  margin-top: 26px; max-width: 520px;
  font-size: 15.5px; line-height: 1.9; color: var(--text-2);
}
.hero-actions { display: flex; gap: 14px; margin-top: 38px; flex-wrap: wrap; }

.hero-stats {
  display: flex; align-items: center; gap: 32px; margin-top: 64px;
  padding-top: 32px; border-top: 1px solid var(--line);
}
.hero-stats > div { display: flex; flex-direction: column; gap: 6px; }
.hero-stats b {
  font-family: var(--serif); font-size: 34px; font-weight: 400;
  color: var(--gold-2); font-variant-numeric: tabular-nums;
}
.hero-stats span { font-size: 12px; letter-spacing: .1em; color: var(--text-3); text-transform: uppercase; }
.stat-div { width: 1px; height: 38px; background: var(--line); padding: 0 !important; }

/* ---------- 通用区块 ---------- */
.section { padding: 110px 0; }
.dark-strip { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.sec-head { max-width: 640px; margin-bottom: 56px; }
.sec-head h2 { font-size: clamp(30px, 4vw, 48px); }
.sec-sub { margin-top: 20px; font-size: 15px; line-height: 1.9; color: var(--text-2); }

/* ---------- 课程卡 ---------- */
.class-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.class-card {
  background: var(--panel); border: 1px solid var(--line);
  overflow: hidden; transition: transform .4s var(--ease), border-color .4s ease;
}
.class-card:hover { transform: translateY(-6px); border-color: var(--line-2); }
.cc-img { aspect-ratio: 4 / 3; overflow: hidden; }
.cc-img svg { width: 100%; height: 100%; transition: transform .7s var(--ease); }
.class-card:hover .cc-img svg { transform: scale(1.06); }
.cc-body { padding: 26px 24px 28px; }
.cc-body h3 { font-size: 23px; margin-bottom: 12px; }
.cc-body p { font-size: 14px; line-height: 1.8; color: var(--text-2); }
.cc-meta {
  margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line);
  font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--gold);
}

/* ---------- 教练 ---------- */
.coach-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.coach {
  padding: 36px 28px; text-align: center;
  border: 1px solid var(--line); background: var(--bs-1, rgba(255, 255, 255, .015));
  transition: all .4s var(--ease);
}
.coach:hover { border-color: var(--gold); background: rgba(201, 168, 118, .04); }
.coach-ava {
  width: 76px; height: 76px; margin: 0 auto 22px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--serif); font-size: 30px; color: var(--gold-2);
  background: radial-gradient(circle at 30% 30%, rgba(201, 168, 118, .28), rgba(201, 168, 118, .06));
  border: 1px solid rgba(201, 168, 118, .45);
}
.coach h3 { font-size: 22px; margin-bottom: 8px; }
.coach-role {
  font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 18px;
}
.coach-desc { font-size: 13.5px; line-height: 1.85; color: var(--text-2); }

/* ---------- 入会 ---------- */
.plan-sec { background: var(--bg-2); border-top: 1px solid var(--line); }
.plan-card {
  display: grid; grid-template-columns: 1.15fr .85fr;
  border: 1px solid var(--line-2); background: var(--panel);
  overflow: hidden;
}
.plan-main { padding: 48px 44px; }
.plan-label {
  font-size: 11.5px; letter-spacing: .28em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 18px;
}
.plan-price { display: flex; align-items: baseline; gap: 4px; margin-bottom: 30px; }
.plan-cur { font-size: 22px; color: var(--text-2); }
.plan-num {
  font-family: var(--serif); font-size: 60px; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.plan-per { font-size: 13px; color: var(--text-3); }
.plan-list { list-style: none; padding: 0; margin: 0 0 34px; display: flex; flex-direction: column; gap: 15px; }
.plan-list li {
  position: relative; padding-left: 26px;
  font-size: 14px; color: var(--text-2); line-height: 1.6;
}
.plan-list li::before {
  content: ""; position: absolute; left: 0; top: 6px;
  width: 12px; height: 6px;
  border-left: 1.5px solid var(--gold); border-bottom: 1.5px solid var(--gold);
  transform: rotate(-45deg);
}
.plan-note {
  margin-top: 16px; text-align: center;
  font-size: 12px; color: var(--text-3); letter-spacing: .04em;
}

.plan-side {
  padding: 48px 40px; display: flex; align-items: center;
  background: linear-gradient(160deg, rgba(201, 168, 118, .09), transparent 70%);
  border-left: 1px solid var(--line);
}
.plan-side blockquote { margin: 0; }
.plan-side blockquote p {
  font-family: var(--serif); font-size: 21px; line-height: 1.65;
  color: var(--text); font-style: italic;
}
.plan-side footer {
  margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 5px;
}
.plan-side footer strong { font-size: 13.5px; font-weight: 600; color: var(--gold-2); }
.plan-side footer span { font-size: 12px; color: var(--text-3); letter-spacing: .06em; }

/* ---------- CTA ---------- */
.cta-sec { padding: 120px 0; }
.cta-inner { text-align: center; }
.cta-inner h2 { font-size: clamp(30px, 4.4vw, 54px); margin-bottom: 38px; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); padding: 46px 0; background: var(--bg-2); }
.footer-inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; align-items: center; }
.footer-desc { margin-top: 14px; font-size: 12.5px; color: var(--text-3); letter-spacing: .06em; }
.footer-right { text-align: right; font-size: 12.5px; color: var(--text-3); line-height: 2; }

/* ---------- 动效 ---------- */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity .9s var(--ease) var(--d, 0s), transform .9s var(--ease) var(--d, 0s);
}
.reveal.in { opacity: 1; transform: none; }

/* 语言切换淡入 */
body.lang-switching [data-i18n] { opacity: .3; transition: opacity .15s ease; }
[data-i18n] { transition: opacity .2s ease; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .nav { display: none; }
  .burger { display: block; }
  .mobile-nav { display: flex; }
  .class-grid, .coach-grid { grid-template-columns: repeat(2, 1fr); }
  .plan-card { grid-template-columns: 1fr; }
  .plan-side { border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 640px) {
  .shell { width: calc(100% - 36px); }
  .header-inner { height: 66px; }
  .header-right .btn { display: none; }
  .hero { min-height: auto; padding: 118px 0 64px; }
  .hero-stats { flex-wrap: wrap; gap: 22px 28px; margin-top: 44px; }
  .stat-div { display: none; }
  .section { padding: 72px 0; }
  .class-grid, .coach-grid { grid-template-columns: 1fr; }
  .plan-main, .plan-side { padding: 34px 24px; }
  .plan-num { font-size: 48px; }
  .footer-inner { flex-direction: column; }
  .footer-right { text-align: left; }
  .hero-actions .btn { flex: 1; min-width: 150px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}