/* ==========================================================================
   曜尾凝光 — 沉浸式产品展示页
   深色底 + 光晕氛围 + 磨砂玻璃 + 圆角网格
   ========================================================================== */

:root{
  --bg: #050506;
  --bg-elevated: #0b0b0e;
  --bg-elevated-2: #101014;

  --text: #f4efe6;
  --text-dim: rgba(244,239,230,0.68);
  --text-faint: rgba(244,239,230,0.42);

  --gold: #d8b876;
  --gold-soft: rgba(216,184,118,0.35);
  --teal: #3fe6c4;
  --magenta: #ff7fb0;

  --wood: #7fd88f;
  --water: #5ec6f2;
  --fire: #ff6f8f;
  --earth: #e0a860;

  --glass-bg: rgba(255,255,255,0.055);
  --glass-bg-strong: rgba(255,255,255,0.09);
  --glass-border: rgba(255,255,255,0.14);
  --glass-shadow: 0 20px 60px rgba(0,0,0,0.5);

  --radius-xl: 32px;
  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 12px;

  --font-serif: 'Noto Serif TC', 'Songti TC', serif;
  --font-sans: 'Noto Sans TC', 'PingFang TC', sans-serif;
  --font-display: 'Cormorant Garamond', 'Noto Serif TC', serif;
}

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

html{ scroll-behavior: smooth; background: var(--bg); }

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 300;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body:not(.ready){ overflow: hidden; height: 100vh; }

h1,h2,h3{ font-family: var(--font-serif); font-weight: 600; margin: 0; letter-spacing: 0.01em; }
p{ margin: 0; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
img{ max-width: 100%; display: block; }

/* ---------------------------------- 背景层 --------------------------------- */

#frame-canvas{
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  background: var(--bg);
  display: block;
}

.ambient-glow{
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 1;
  opacity: 0.55;
  mix-blend-mode: screen;
  animation: drift 22s ease-in-out infinite alternate;
}
.glow-gold{
  width: 46vw; height: 46vw;
  top: -12vw; left: -10vw;
  background: radial-gradient(circle, var(--gold) 0%, transparent 70%);
  animation-delay: 0s;
}
.glow-teal{
  width: 40vw; height: 40vw;
  bottom: -14vw; right: -8vw;
  background: radial-gradient(circle, var(--teal) 0%, transparent 70%);
  animation-delay: -7s;
}
.glow-magenta{
  width: 34vw; height: 34vw;
  top: 40vh; right: 20vw;
  background: radial-gradient(circle, var(--magenta) 0%, transparent 70%);
  opacity: 0.32;
  animation-delay: -14s;
}
@keyframes drift{
  0%   { transform: translate(0,0) scale(1); }
  100% { transform: translate(3vw, -2vw) scale(1.08); }
}

@media (prefers-reduced-motion: reduce){
  .ambient-glow{ animation: none; }
}

/* ---------------------------------- 玻璃质感 -------------------------------- */

.glass{
  background: var(--glass-bg);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* ---------------------------------- 载入遮罩 -------------------------------- */

.loader{
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  background: var(--bg);
  transition: opacity 0.7s ease;
}
.loader.hidden{ opacity: 0; pointer-events: none; }
.loader-mark{
  font-family: var(--font-serif);
  font-size: 44px;
  color: var(--gold);
  border: 1px solid var(--gold-soft);
  width: 84px; height: 84px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 40px var(--gold-soft);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{ box-shadow: 0 0 24px var(--gold-soft); }
  50%{ box-shadow: 0 0 52px var(--gold-soft); }
}
.loader-bar{
  width: 220px; height: 2px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
  overflow: hidden;
}
.loader-fill{
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--gold), var(--teal));
  transition: width 0.25s ease;
}
.loader-text{
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

/* ---------------------------------- 导航列 --------------------------------- */

.nav-wrap{
  position: fixed;
  top: 20px;
  left: 0; right: 0;
  z-index: 40;
  display: flex;
  justify-content: center;
  padding: 0 20px;
  pointer-events: none;
}
.nav{
  pointer-events: auto;
  width: min(920px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 14px 12px 26px;
  border-radius: 999px;
}
.nav-logo{
  font-family: var(--font-serif);
  font-size: 18px;
  letter-spacing: 0.06em;
  color: var(--text);
  white-space: nowrap;
}
.nav-links{
  display: flex;
  gap: 30px;
  font-size: 14px;
  color: var(--text-dim);
}
.nav-links a{ transition: color 0.25s ease; }
.nav-links a:hover{ color: var(--gold); }

.btn-pill{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 24px;
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: 0.04em;
  background: var(--text);
  color: #101010;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  white-space: nowrap;
}
.btn-pill:hover{ transform: translateY(-1px); }
.btn-nav{ padding: 10px 22px; font-size: 13px; }

.btn-glow{
  background: linear-gradient(135deg, var(--gold), #f3d9a3);
  color: #1a1305;
  box-shadow: 0 8px 30px var(--gold-soft);
}
.btn-glow:hover{ box-shadow: 0 10px 40px var(--gold-soft); }
.btn-lg{ padding: 16px 42px; font-size: 16px; }

@media (max-width: 760px){
  .nav-links{ display: none; }
}

/* ---------------------------------- 视差叙事区 ------------------------------ */

.scroll-story{
  position: relative;
  height: 620vh;
  z-index: 2;
}
.story-sticky{
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
}
.story-sticky::before{
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0,0,0,0.5) 0%, transparent 18%, transparent 78%, rgba(0,0,0,0.6) 100%),
    radial-gradient(ellipse at 50% 55%, transparent 38%, rgba(0,0,0,0.45) 100%);
  pointer-events: none;
  z-index: 1;
}

.story-caption{
  position: absolute;
  left: 8%;
  top: 50%;
  transform: translateY(24px);
  max-width: 480px;
  opacity: 0;
  z-index: 2;
  will-change: opacity, transform;
}

.eyebrow{
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.story-caption h2{
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.35;
  color: var(--text);
  margin-bottom: 18px;
  text-shadow: 0 4px 30px rgba(0,0,0,0.5);
}
.story-caption .desc{
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-dim);
  max-width: 420px;
}

.side-card{
  position: absolute;
  right: 6%;
  top: 50%;
  width: 250px;
  padding: 26px 24px;
  border-radius: var(--radius-lg);
  z-index: 2;
  opacity: 0;
  will-change: opacity, transform;
}
.side-eyebrow{
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--magenta);
  margin-bottom: 10px;
}
.side-title{
  font-family: var(--font-serif);
  font-size: 22px;
  margin-bottom: 4px;
}
.side-sub{
  font-size: 12.5px;
  color: var(--text-faint);
  margin-bottom: 18px;
}
.side-price{
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--gold);
  margin-bottom: 18px;
}
.side-card .btn-pill{ width: 100%; }

.scroll-hint{
  position: absolute;
  bottom: 42px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 2;
}
.arrow{ display: inline-block; animation: bob 1.8s ease-in-out infinite; }
@keyframes bob{
  0%,100%{ transform: translateY(0); }
  50%{ transform: translateY(6px); }
}

@media (max-width: 900px){
  .side-card{ display: none; }
  .story-caption{ left: 6%; max-width: 82%; }
}
@media (max-width: 560px){
  .story-caption h2{ font-size: clamp(24px, 7vw, 32px); }
  .story-caption .desc{ font-size: 14px; }
}

/* ---------------------------------- 内容分节共用 ---------------------------- */

section:not(.scroll-story){
  position: relative;
  z-index: 2;
  background: var(--bg);
  padding: 140px 8vw;
}
.section-eyebrow{
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.16em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 14px;
  text-align: center;
}
.section-title{
  font-size: clamp(30px, 4vw, 46px);
  text-align: center;
  margin-bottom: 16px;
}
.section-sub{
  text-align: center;
  color: var(--text-dim);
  font-size: 15px;
  max-width: 520px;
  margin: 0 auto 64px;
  line-height: 1.8;
}

/* ---------------------------------- 圆角网格 -------------------------------- */

.grid{
  display: grid;
  gap: 22px;
}
.grid-5{
  grid-template-columns: repeat(5, 1fr);
}
.grid-3{
  grid-template-columns: repeat(3, 1fr);
}

.card{
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.card::after{
  content: '';
  position: absolute;
  top: -40%; left: -20%;
  width: 60%; height: 60%;
  background: var(--accent, var(--gold));
  filter: blur(60px);
  opacity: 0.25;
  border-radius: 50%;
  pointer-events: none;
}
.card:hover{
  transform: translateY(-6px);
  box-shadow: 0 26px 70px rgba(0,0,0,0.55);
}
.card-glyph{
  font-family: var(--font-serif);
  font-size: 30px;
  width: 56px; height: 56px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--glass-border);
  color: var(--accent, var(--gold));
  margin-bottom: 20px;
}
.card h3{ font-size: 19px; margin-bottom: 6px; }
.card-note{
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin-bottom: 14px;
}
.card-desc{
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.craft-card{
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding-bottom: 28px;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.craft-card:hover{ transform: translateY(-6px); box-shadow: 0 26px 70px rgba(0,0,0,0.55); }
.craft-thumb{
  height: 220px;
  background-size: cover;
  background-position: center 25%;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  position: relative;
}
.craft-thumb::after{
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5,5,6,0.85) 100%);
}
.craft-card h3{ font-size: 19px; margin: 22px 24px 10px; }
.craft-card p{ font-size: 13.5px; line-height: 1.85; color: var(--text-dim); margin: 0 24px; }

@media (max-width: 1024px){
  .grid-5{ grid-template-columns: repeat(3, 1fr); }
  .grid-3{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px){
  section:not(.scroll-story){ padding: 90px 6vw; }
  .grid-5{ grid-template-columns: repeat(2, 1fr); }
  .grid-3{ grid-template-columns: 1fr; }
}

/* ---------------------------------- 限量典藏 -------------------------------- */

.collect{
  display: flex;
  justify-content: center;
}
.collect-card{
  width: 100%;
  max-width: 760px;
  border-radius: var(--radius-xl);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.collect-card::before{
  content: '';
  position: absolute;
  top: -30%; left: 50%;
  transform: translateX(-50%);
  width: 70%; height: 60%;
  background: radial-gradient(circle, var(--gold-soft) 0%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}
.collect-card h2{
  font-size: clamp(26px, 3.6vw, 36px);
  margin: 8px 0 20px;
}
.collect-desc{
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.9;
  max-width: 480px;
  margin: 0 auto 36px;
}
.collect-gallery{
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 40px;
}
.collect-thumb{
  width: 84px; height: 108px;
  border-radius: var(--radius-sm);
  background-size: cover;
  background-position: center;
  border: 1px solid var(--glass-border);
}
.collect-price{
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--gold);
  margin-bottom: 30px;
}
.collect-price span{
  display: block;
  font-family: var(--font-sans);
  font-size: 12.5px;
  color: var(--text-faint);
  margin-top: 8px;
  letter-spacing: 0.03em;
}

/* ---------------------------------- 页尾 ----------------------------------- */

footer{
  position: relative;
  z-index: 2;
  background: var(--bg);
  padding: 0 8vw 80px;
}
.footer-inner{
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.footer-logo{
  font-family: var(--font-serif);
  font-size: 22px;
  margin-bottom: 6px;
}
.footer-tag{
  font-size: 12.5px;
  color: var(--text-faint);
}
.footer-links{
  display: flex;
  gap: 26px;
  font-size: 13.5px;
  color: var(--text-dim);
}
.footer-links a:hover{ color: var(--gold); }
.footer-copy{
  width: 100%;
  text-align: center;
  font-size: 11.5px;
  color: var(--text-faint);
  padding-top: 24px;
  margin-top: 8px;
  border-top: 1px solid var(--glass-border);
}