/* =============================================================================
 * GRIMSTRAND · main.css
 *
 * 设计意图: 古文物碑刻被火把照亮(weathered monument inscription, torchlit)。
 * - 不对称布局 / 留白节奏 = 大教堂 nave 而非 grid
 * - 色板严守 Bible §4: 黑漆 / 墨棕 / 古金 / 哑铜 / 米黄 / 流光金
 * - 严禁: 紫色渐变白底、Inter/Arial、CSS hairline、centered-card-grid 套路
 * ========================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  /* 色板 (Bible §4 锁定) */
  --bg-deep: #1A1310;       /* 黑漆 black lacquer */
  --bg-ink: #2A1F18;        /* 墨棕 ink brown */
  --bg-stone: #303030;      /* 暗石 dark slate */
  --bg-weathered: #2E2D2A;  /* 风化石 weathered stone */
  --bg-rim: #3B2C20;        /* 深棕 deep brown */
  --metal-bronze: #6E5A40;  /* 哑铜 tarnished bronze */
  --metal-gold: #9C7A3C;    /* 古金 antique gold */
  --paper-silk: #C8B79A;    /* 米黄 raw silk */
  --glow-gold: #E8C76B;     /* 流光金(罕用,仅 hover/focus) */

  /* 派生 */
  --text-primary: #C8B79A;          /* = paper-silk */
  --text-soft: #8d7e66;             /* paper-silk 衰减 65% */
  --text-faint: #5A554C;            /* 稀有度 0 描边 */
  --rule-faint: rgba(110, 90, 64, 0.22);  /* tarnished-bronze 8% */
  --rule-medium: rgba(156, 122, 60, 0.45);

  /* 尺度 */
  --content-max: 1240px;
  --gutter: clamp(1.5rem, 4vw, 4rem);
  --section-pad: clamp(6rem, 12vh, 12rem);

  /* 动效 */
  --ease-monumental: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-torch: cubic-bezier(0.45, 0.05, 0.55, 0.95);
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.5vw + 0.875rem, 1.0625rem);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: geometricPrecision;
  overflow-x: hidden;
}

/* 选区:古金加深底,黑漆字 */
::selection { background: var(--metal-gold); color: var(--bg-deep); }

/* 焦点环:不要默认蓝色 */
:focus-visible {
  outline: 1px solid var(--glow-gold);
  outline-offset: 3px;
}

a {
  color: var(--paper-silk);
  text-decoration: none;
  position: relative;
}

button { font: inherit; cursor: pointer; }

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

/* ---------- 全局背景大气(双角余烬 + 顶光 + 暗角) ----------
   设计意图: 一卷被火把照亮的羊皮纪事 —— 左下暖炉光、右上冷铜雾、中部呼吸、四角压暗。
   每层用 ellipse radial,大半径柔过渡,避免 banding。 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    /* 1. 左下暖炉余烬 —— 主光源,色温偏金 */
    radial-gradient(ellipse 95% 70% at 8% 118%,
      rgba(156, 122, 60, 0.22) 0%,
      rgba(110, 90, 64, 0.10) 32%,
      transparent 62%),
    /* 2. 右上冷铜雾 —— 次光源,色温偏铜青 */
    radial-gradient(ellipse 70% 55% at 96% -12%,
      rgba(200, 183, 154, 0.075) 0%,
      rgba(110, 90, 64, 0.045) 38%,
      transparent 70%),
    /* 3. 中部柔光 —— 给主标题留一个呼吸的腔 */
    radial-gradient(ellipse 1200px 900px at 50% 28%,
      rgba(58, 42, 28, 0.28) 0%,
      transparent 68%),
    /* 4. 顶到底的色温压低 */
    linear-gradient(180deg,
      #1c1410 0%,
      var(--bg-deep) 35%,
      #110A06 100%);
}
/* 颗粒/噪点层 — SVG turbulence,稍重一点点,刻石感 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.22;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='260' height='260'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.55  0 0 0 0 0.45  0 0 0 0 0.32  0 0 0 0.55 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 260px 260px;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem var(--gutter);
  transition: background-color 0.5s var(--ease-torch),
              backdrop-filter 0.5s var(--ease-torch),
              border-color 0.5s var(--ease-torch);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background-color: rgba(17, 10, 6, 0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom-color: var(--rule-faint);
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.35em;
  font-size: 0.9rem;
  color: var(--paper-silk);
  text-transform: uppercase;
}
.brand-mark__glyph {
  width: 10px;
  height: 10px;
  background: var(--metal-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(232, 199, 107, 0.4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--text-soft);
  transition: color 0.3s var(--ease-torch);
  padding: 0.5rem 0;
}
.nav-links a:hover { color: var(--glow-gold); }

/* 语言切换 */
.lang-switch {
  position: relative;
}
.lang-switch__button {
  background: transparent;
  border: 1px solid var(--rule-medium);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  padding: 0.55rem 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: border-color 0.3s var(--ease-torch),
              color 0.3s var(--ease-torch);
}
.lang-switch__button:hover {
  border-color: var(--metal-gold);
  color: var(--glow-gold);
}
.lang-switch__menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  min-width: 200px;
  background: rgba(17, 10, 6, 0.96);
  backdrop-filter: blur(10px);
  border: 1px solid var(--rule-medium);
  padding: 0.5rem 0;
  display: none;
  max-height: 60vh;
  overflow-y: auto;
}
.lang-switch[data-open="true"] .lang-switch__menu { display: block; }
.lang-switch__menu button {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.6rem 1.1rem;
  letter-spacing: 0.04em;
  transition: background 0.2s, color 0.2s;
}
.lang-switch__menu button:hover {
  background: rgba(156, 122, 60, 0.12);
  color: var(--glow-gold);
}
.lang-switch__menu button[aria-current="true"] {
  color: var(--metal-gold);
}

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--gutter);
  overflow: hidden;
}

/* Hero 底层 stone 纹理叠加 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: url("../assets/bg/stone-dark.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.45;
  mix-blend-mode: overlay;
}
/* Hero 渐变 vignette */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse at center, transparent 0%, transparent 50%, var(--bg-deep) 100%),
    linear-gradient(180deg, transparent 0%, transparent 60%, var(--bg-deep) 100%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Logo 容器 + torch-mask 入场 */
.hero__logo {
  /* picture 默认 display:inline,会忽略 width。必须 block,否则内部 img 走 width="1600" 属性
     当作 intrinsic 尺寸,clamp() 静默失效,logo 渲染成 1600px 宽撑爆 flex 列居中。 */
  display: block;
  position: relative;
  width: clamp(280px, 70vw, 880px);
  max-width: 100%;
  margin: 0 auto 2.4rem auto;
  /* 初始状态:遮罩压窄到左侧 + 浮起 6px */
  opacity: 0;
  transform: translateY(6px);
  -webkit-mask-image: linear-gradient(
    100deg,
    transparent 0%,
    transparent 35%,
    #000 50%,
    #000 100%
  );
          mask-image: linear-gradient(
    100deg,
    transparent 0%,
    transparent 35%,
    #000 50%,
    #000 100%
  );
  -webkit-mask-size: 250% 100%;
          mask-size: 250% 100%;
  /* 初始:遮罩在最左,容器对应 mask 0-40%(几乎全透明),logo 隐藏。
     动画 hero-logo-torch 把 mask 推到右边,容器对应 mask 60-100%(全不透明),logo 全显。
     设计意图:火炬从左扫到右逐步露出 logo。 */
  -webkit-mask-position: 0% 0;
          mask-position: 0% 0;
}
.hero__logo img {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 0 28px rgba(232, 199, 107, 0.12));
}
.hero.entered .hero__logo {
  animation:
    hero-logo-fade 1.0s var(--ease-torch) forwards,
    hero-logo-torch 1.2s var(--ease-monumental) forwards,
    hero-logo-rise 1.2s var(--ease-monumental) forwards;
}
@keyframes hero-logo-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes hero-logo-torch {
  from { -webkit-mask-position:   0% 0; mask-position:   0% 0; }
  to   { -webkit-mask-position: 100% 0; mask-position: 100% 0; }
}
@keyframes hero-logo-rise {
  0%   { transform: translateY(6px); }
  60%  { transform: translateY(-3px); }
  100% { transform: translateY(0); }
}

/* Tagline (一行,大写,字距宽) */
.hero__tagline {
  font-family: var(--font-display);
  font-size: clamp(0.78rem, 1.6vw, 1.05rem);
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--text-soft);
  margin: 0 0 0.5rem 0;
  opacity: 0;
  transform: translateY(8px);
}
.hero.entered .hero__tagline {
  animation: hero-fade-up 1s 0.4s var(--ease-torch) forwards;
}

.hero__atmos {
  font-family: var(--font-body);
  font-style: italic;
  font-size: clamp(0.95rem, 1.3vw, 1.1rem);
  color: var(--text-soft);
  max-width: 540px;
  margin: 0 auto 3.2rem auto;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(8px);
}
.hero.entered .hero__atmos {
  animation: hero-fade-up 1s 0.7s var(--ease-torch) forwards;
}

.hero__ctas {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
  transform: translateY(8px);
}
.hero.entered .hero__ctas {
  animation: hero-fade-up 1s 1.0s var(--ease-torch) forwards;
}

@keyframes hero-fade-up {
  to { opacity: 1; transform: translateY(0); }
}

/* 滚动提示 */
.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--text-faint);
  opacity: 0;
  animation: hero-fade-up 1.4s 1.5s var(--ease-torch) forwards,
             scroll-hint 2.4s 2.9s var(--ease-monumental) infinite;
}
@keyframes scroll-hint {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
  50%      { transform: translateX(-50%) translateY(4px); opacity: 0.25; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  padding: 1.05rem 2rem;
  background: transparent;
  border: 1px solid var(--metal-gold);
  color: var(--paper-silk);
  position: relative;
  overflow: hidden;
  transition: color 0.4s var(--ease-torch),
              border-color 0.4s var(--ease-torch);
}
/* 按钮内侧 torch 扫光 (hover) */
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    transparent 0%,
    rgba(232, 199, 107, 0.16) 50%,
    transparent 100%
  );
  transform: translateX(-100%);
  transition: transform 0.7s var(--ease-monumental);
}
.btn:hover {
  color: var(--glow-gold);
  border-color: var(--glow-gold);
}
.btn:hover::before { transform: translateX(100%); }

.btn--primary {
  background: linear-gradient(180deg, #3a2c1d 0%, #2a1f15 100%);
  border-color: var(--metal-gold);
  box-shadow:
    inset 0 1px 0 rgba(232, 199, 107, 0.12),
    inset 0 -1px 0 rgba(0, 0, 0, 0.4);
}

/* 无响应态:视觉灰退 + 阻断点击/聚焦/hover scan,但保留 layout 占位 */
.btn--disabled {
  opacity: 0.42;
  cursor: not-allowed;
  pointer-events: none;
  border-color: var(--text-faint);
  color: var(--text-faint);
}
.btn--disabled::before { display: none; }

.btn__arrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 1.05em;
  letter-spacing: 0;
  transition: transform 0.4s var(--ease-monumental);
}
.btn:hover .btn__arrow { transform: translateX(4px); }

/* ---------- 分割条:ink-stain ---------- */
/* 签名互动:gold 金属条从中心向两侧打开,带一个中心钻石 mark */
.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 0;
}
.divider__wrap {
  width: min(640px, 80vw);
  display: flex;
  align-items: center;
  gap: 1.2rem;
}
.divider__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--metal-bronze) 20%,
    var(--metal-gold) 50%,
    var(--metal-bronze) 80%,
    transparent 100%
  );
  position: relative;
  transform: scaleX(0);
  transition: transform 1.4s var(--ease-monumental);
}
.divider__line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(232, 199, 107, 0.4) 50%,
    transparent 100%
  );
  filter: blur(3px);
  height: 6px;
  top: -2.5px;
}
.divider__diamond {
  width: 11px;
  height: 11px;
  background: var(--metal-gold);
  transform: rotate(45deg) scale(0);
  box-shadow:
    0 0 8px rgba(232, 199, 107, 0.6),
    inset 0 1px 1px rgba(255, 220, 140, 0.6),
    inset 0 -1px 1px rgba(0, 0, 0, 0.4);
  transition: transform 0.8s 0.6s var(--ease-monumental);
}
.divider.in-view .divider__line {
  transform: scaleX(1);
  transform-origin: center;
}
.divider.in-view .divider__diamond {
  transform: rotate(45deg) scale(1);
}

/* ---------- 通用 section ---------- */
.section {
  padding: var(--section-pad) var(--gutter);
  position: relative;
}
.section__inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.46em;
  text-transform: uppercase;
  color: var(--metal-bronze);
  margin: 0 0 1.2rem 0;
}

h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-silk);
  margin: 0 0 1.5rem 0;
  line-height: 1.15;
}
h2 .accent { color: var(--metal-gold); }

/* ---------- Pillars (三支柱) ---------- */
/* 不要三栏 grid 套路 —— 用 roman numeral 左,内容右,垂直 stack,不对称 */
.pillars {
  display: flex;
  flex-direction: column;
  gap: clamp(4rem, 8vh, 7rem);
}
.pillar {
  display: grid;
  grid-template-columns: minmax(110px, 1fr) 6fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1s var(--ease-torch),
              transform 1s var(--ease-torch);
}
.pillar.in-view { opacity: 1; transform: translateY(0); }

.pillar__numeral {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--metal-bronze);
  letter-spacing: 0;
  text-align: right;
  padding-top: 0.4rem;
  position: relative;
}
.pillar__numeral::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -0.6rem;
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--metal-bronze));
}

.pillar__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-silk);
  margin: 0 0 1rem 0;
}
.pillar__body {
  font-family: var(--font-body);
  color: var(--text-soft);
  max-width: 56ch;
  font-size: 1.04rem;
  line-height: 1.75;
  margin: 0;
}

@media (max-width: 720px) {
  .pillar {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }
  .pillar__numeral {
    text-align: left;
    font-size: clamp(2.2rem, 9vw, 3.5rem);
  }
  .pillar__numeral::after {
    left: 0;
    width: 40%;
    background: linear-gradient(90deg, var(--metal-bronze), transparent);
  }
}

/* ---------- Starshard section ---------- */
.starshard {
  text-align: center;
  position: relative;
}
.starshard__inner {
  max-width: 720px;
  margin: 0 auto;
}
.starshard h2 {
  margin-bottom: 2rem;
}
.starshard p {
  font-style: italic;
  font-size: clamp(1.1rem, 1.6vw, 1.28rem);
  line-height: 1.85;
  color: var(--text-primary);
  max-width: 56ch;
  margin: 0 auto;
  letter-spacing: 0.01em;
}
.starshard__shard {
  width: 56px;
  height: 56px;
  margin: 3rem auto 0 auto;
  opacity: 0;
  transform: rotate(-15deg) scale(0.6);
  transition: opacity 1s 0.4s var(--ease-torch),
              transform 1.4s 0.4s var(--ease-monumental);
}
.starshard.in-view .starshard__shard {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ---------- CTA strip ---------- */
.cta-strip {
  text-align: center;
  padding: clamp(7rem, 14vh, 11rem) var(--gutter);
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(42, 31, 24, 0.4) 50%,
    transparent 100%
  );
}
.cta-strip h2 {
  margin-bottom: 2.4rem;
}
.cta-strip__ctas {
  display: flex;
  gap: 1.2rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 3rem var(--gutter) 2.4rem var(--gutter);
  border-top: 1px solid var(--rule-faint);
  font-family: var(--font-body);
  font-size: 0.86rem;
  color: var(--text-faint);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: center;
}
.site-footer__brand {
  font-family: var(--font-display);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-size: 0.78rem;
}
.site-footer__meta {
  text-align: center;
  letter-spacing: 0.06em;
}
.site-footer__links {
  display: flex;
  gap: 1.6rem;
  justify-content: flex-end;
}
.site-footer__links a {
  color: var(--text-soft);
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  transition: color 0.3s var(--ease-torch);
}
.site-footer__links a:hover { color: var(--glow-gold); }

.footer__host {
  display: inline-block;
  margin-top: 0.4rem;
  font-family: var(--font-display);
  letter-spacing: 0.22em;
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--metal-bronze);
}
html[data-domain-status="pending"] .footer__host {
  color: var(--metal-gold);
}
.footer__host-ip {
  color: var(--text-faint);
  margin-left: 0.4rem;
}
/* [data-show-when] 默认隐藏,JS 显隐控制(避免裸 HTML 同时显示 live+pending) */
[data-show-when] { display: none; }

@media (max-width: 720px) {
  .site-footer {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .site-footer__links { justify-content: center; }
}

/* ---------- 移动适配 ---------- */
@media (max-width: 880px) {
  .nav-links { display: none; }   /* 简化:暂时不放汉堡菜单,导航靠 hero 内 CTA */
  .site-header { padding: 1rem 1rem; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Download page 专用 ---------- */
.download-page .hero { min-height: 60vh; }
.platforms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.4rem;
  margin: 3rem auto 0 auto;
  max-width: 920px;
}
/* 单平台:不要拉满整行,居中收窄,避免一个 card 像被遗弃 */
.platforms--single {
  grid-template-columns: minmax(280px, 420px);
  justify-content: center;
}
.platform-card {
  border: 1px solid var(--rule-medium);
  padding: 2.2rem 1.6rem 1.6rem 1.6rem;
  text-align: center;
  background: linear-gradient(180deg, rgba(42, 31, 24, 0.5) 0%, rgba(17, 10, 6, 0.2) 100%);
  transition: border-color 0.4s var(--ease-torch),
              transform 0.5s var(--ease-torch);
}
.platform-card:hover {
  border-color: var(--metal-gold);
  transform: translateY(-2px);
}
.platform-card__os {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--metal-gold);
  margin-bottom: 0.6rem;
}
.platform-card__name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.12em;
  color: var(--paper-silk);
  margin: 0 0 1rem 0;
}
.platform-card__note {
  color: var(--text-soft);
  font-size: 0.92rem;
  font-style: italic;
  margin: 0 0 1.5rem 0;
}

/* ========================================================================== */
/* ============== 现代 cinematic redesign · 2026-05-13 ============== */
/* ========================================================================== */

/* 设计 tokens 扩展(沿用 Bible §4 色板) */
:root {
  --ease-cinematic: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-card-deep: 0 24px 60px -20px rgba(0,0,0,0.78), 0 2px 8px rgba(0,0,0,0.45);
  --hover-lift: -6px;
}

/* ---------- 余烬粒子层(JS 生成,加性混合) ----------
   暖色 ember(炉火橙金) + 冷色 spark(铜雾灰金)双类型,
   每颗独立 drift / duration / scale / opacity,带 box-shadow 软光晕。 */
.embers-layer {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  overflow: hidden;
  mix-blend-mode: plus-lighter;
}
.ember {
  position: absolute;
  bottom: -16px;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  filter: blur(0.4px);
  opacity: 0;
  will-change: transform, opacity;
  animation: ember-rise linear infinite;
}
.ember--warm {
  background: rgba(232, 199, 107, 0.85);
  box-shadow: 0 0 8px rgba(232, 199, 107, 0.55);
}
.ember--cool {
  background: rgba(200, 183, 154, 0.55);
  box-shadow: 0 0 6px rgba(156, 122, 60, 0.30);
}
@keyframes ember-rise {
  0%   { transform: translate3d(0, 0, 0) scale(0.6);   opacity: 0; }
  8%   { opacity: var(--ember-peak, 0.7); }
  85%  { opacity: calc(var(--ember-peak, 0.7) * 0.45); }
  100% { transform: translate3d(var(--ember-drift, 40px), -110vh, 0) scale(1.05); opacity: 0; }
}

/* ---------- HERO · cinematic video bg ---------- */
.hero--cinematic {
  isolation: isolate;
}
/* 关掉旧 stone-dark bg ::before;视频替代 */
.hero--cinematic::before {
  display: none;
}
.hero__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  /* 视频本身去色 + 加暗,让品牌色不被原视频抢戏 */
  filter: contrast(1.05) saturate(0.55) brightness(0.55);
  pointer-events: none;
}
.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at center, transparent 0%, rgba(17,10,6,0.35) 55%, var(--bg-deep) 100%),
    linear-gradient(180deg, rgba(17,10,6,0.55) 0%, transparent 25%, transparent 65%, rgba(17,10,6,0.85) 100%);
}
.hero--cinematic .hero__inner {
  z-index: 3;
}
.hero--cinematic::after { z-index: 1; }

/* ---------- Magnetic button ---------- */
.btn--magnetic {
  transition:
    color 0.4s var(--ease-torch),
    border-color 0.4s var(--ease-torch),
    transform 0.45s var(--ease-cinematic),
    box-shadow 0.45s var(--ease-cinematic);
  will-change: transform;
}
.btn--magnetic:hover {
  box-shadow:
    0 0 24px rgba(232, 199, 107, 0.18),
    inset 0 1px 0 rgba(232, 199, 107, 0.22);
  transform: translate3d(var(--magx, 0), var(--magy, 0), 0) translateY(-1px);
}
.btn--magnetic::after {
  content: "";
  position: absolute;
  inset: -8px;
  border: 1px solid transparent;
  pointer-events: none;
  transition: border-color 0.45s var(--ease-torch), inset 0.45s var(--ease-cinematic);
}
.btn--magnetic:hover::after {
  border-color: rgba(156, 122, 60, 0.25);
  inset: -12px;
}

/* ---------- PILLARS · illuminated codex ----------
   设计意图: 三支柱不是 3 列卡片网格,是一卷被火光照亮的纪事手稿。
   每条 entry 一行,左侧大型罗马数字 + 中部章节标题/正文 + 右侧纹章 SVG + 元信息。
   条目之间 hairline,hover 时整条向右滑 + 铜色起手线生长,数字加亮,纹章微旋。 */

.codex .section__inner { max-width: var(--content-max); }

/* 段首 eyebrow / h2 已由通用样式负责; 把 chronicle 的标题与纪事拉开节奏 */
.codex h2 { margin-bottom: 4rem; }

.codex__list {
  list-style: none;
  padding: 0;
  margin: 3rem 0 0 0;
  border-top: 1px solid var(--rule-faint);
}

.codex__entry {
  position: relative;
  display: grid;
  grid-template-columns: clamp(72px, 8.5vw, 124px) 1fr clamp(160px, 20vw, 240px);
  column-gap: clamp(1.4rem, 3vw, 3rem);
  align-items: start;
  padding: clamp(2.4rem, 4vw, 3.6rem) 0;
  border-bottom: 1px solid var(--rule-faint);
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 1s var(--ease-torch),
    transform 1s var(--ease-torch),
    padding-left 0.7s var(--ease-cinematic);
}
.codex__entry.in-view { opacity: 1; transform: translateY(0); }

/* hover: 整条向右挪 28px,左边距让位给生长的铜线 */
@media (hover: hover) {
  .codex__entry:hover { padding-left: 28px; }
}

/* 铜色 hover 起手线,从左边长出 —— 参考火炬照亮卷轴边缘 */
.codex__marker {
  position: absolute;
  left: -24px;
  top: 50%;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--metal-bronze) 40%,
    var(--metal-gold) 100%);
  transform: translateY(-50%);
  pointer-events: none;
  transition: width 0.7s var(--ease-cinematic);
}
@media (hover: hover) {
  .codex__entry:hover .codex__marker { width: 44px; }
}

/* 大型罗马数字 —— 雕刻金属感,渐变 + 内阴影 */
.codex__num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(3.4rem, 7vw, 6rem);
  line-height: 0.85;
  letter-spacing: 0;
  text-align: right;
  align-self: start;
  padding-top: 0.18em;
  background: linear-gradient(
    180deg,
    rgba(232, 199, 107, 0.65) 0%,
    var(--metal-gold)        38%,
    var(--metal-bronze)      72%,
    var(--bg-rim)            100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
          color: transparent;
  filter: drop-shadow(0 1px 0 rgba(0,0,0,0.55))
          drop-shadow(0 0 18px rgba(232, 199, 107, 0.05));
  transition: filter 0.6s var(--ease-torch);
}
.codex__entry:hover .codex__num {
  filter: drop-shadow(0 0 18px rgba(232, 199, 107, 0.35))
          drop-shadow(0 0 2px rgba(232, 199, 107, 0.5));
}

/* 章节标题 —— 不全大写,保留章节质感;让 CJK 也吃得住字距 */
.codex__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.45rem, 2.2vw, 2rem);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper-silk);
  margin: 0.1em 0 1rem 0;
  line-height: 1.18;
}
html[lang^="zh"] .codex__title,
html[lang^="ja"] .codex__title,
html[lang^="ko"] .codex__title {
  letter-spacing: 0.08em;
}

/* 正文 —— body 衬线,稍大,行高放宽,色度提一档,左侧加一条铜色短栏标记 */
.codex__prose {
  font-family: var(--font-body);
  color: var(--text-primary);
  font-size: clamp(1rem, 1.05vw, 1.08rem);
  line-height: 1.78;
  max-width: 62ch;
  margin: 0;
  position: relative;
  padding-left: 1rem;
  border-left: 1px solid var(--rule-faint);
  transition: border-color 0.55s var(--ease-torch);
}
.codex__entry:hover .codex__prose {
  border-left-color: var(--metal-bronze);
}

/* 右侧纹章 + 元信息 —— sigil 在上,meta 一行小型 caps 在下 */
.codex__sidemark {
  align-self: start;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1.1rem;
  padding-top: 0.2em;
}
.codex__sigil {
  width: clamp(48px, 4.4vw, 64px);
  height: clamp(48px, 4.4vw, 64px);
  color: var(--metal-bronze);
  transition:
    color 0.6s var(--ease-torch),
    transform 0.7s var(--ease-cinematic),
    filter 0.6s var(--ease-torch);
  filter: drop-shadow(0 0 0 transparent);
}
.codex__entry:hover .codex__sigil {
  color: var(--metal-gold);
  transform: rotate(-6deg) scale(1.04);
  filter: drop-shadow(0 0 10px rgba(232, 199, 107, 0.35));
}
.codex__meta {
  font-family: var(--font-display);
  font-size: 0.66rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--text-faint);
  text-align: right;
  line-height: 1.4;
  max-width: 18ch;
  transition: color 0.55s var(--ease-torch);
}
.codex__entry:hover .codex__meta { color: var(--metal-bronze); }

/* 移动端:堆叠 + 数字回到内容左侧上方,sidemark 推到底部 */
@media (max-width: 880px) {
  .codex__entry {
    grid-template-columns: 1fr;
    row-gap: 1.2rem;
    padding: 2.4rem 0 2rem 0;
  }
  .codex__num {
    text-align: left;
    font-size: clamp(2.8rem, 14vw, 4rem);
    line-height: 1;
  }
  .codex__prose { padding-left: 0; border-left: 0; }
  .codex__sidemark {
    flex-direction: row-reverse;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 0.6rem;
    border-top: 1px solid var(--rule-faint);
  }
  .codex__sigil { width: 44px; height: 44px; }
  .codex__meta { text-align: left; max-width: none; }
}

/* ---------- FEATURES · 6 numbered dense cells ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 3rem;
  background: var(--rule-faint);
  border: 1px solid var(--rule-faint);
}
@media (max-width: 880px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .features-grid { grid-template-columns: 1fr; }
}
.feature-cell {
  position: relative;
  padding: 2.2rem 1.8rem 1.8rem 1.8rem;
  background: linear-gradient(170deg, rgba(42, 31, 24, 0.6) 0%, rgba(17, 10, 6, 0.85) 100%);
  overflow: hidden;
  opacity: 0;
  transition:
    opacity 1s var(--ease-torch),
    background 0.5s var(--ease-torch),
    transform 0.45s var(--ease-cinematic);
}
.feature-cell.in-view { opacity: 1; }
.feature-cell:hover {
  background: linear-gradient(170deg, rgba(58, 44, 30, 0.7) 0%, rgba(26, 19, 16, 0.95) 100%);
  transform: translateY(var(--hover-lift));
  z-index: 2;
}
.feature-cell::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  pointer-events: none;
  transition: border-color 0.4s var(--ease-torch);
}
.feature-cell:hover::before {
  border-color: var(--metal-gold);
}
.feature-cell__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.8rem, 5vw, 4rem);
  line-height: 1;
  letter-spacing: 0;
  color: var(--metal-gold);
  text-shadow: 0 0 24px rgba(232, 199, 107, 0.18);
  margin-bottom: 1.1rem;
  transition: color 0.4s var(--ease-torch), text-shadow 0.4s var(--ease-torch);
}
.feature-cell:hover .feature-cell__num {
  color: var(--glow-gold);
  text-shadow: 0 0 32px rgba(232, 199, 107, 0.45);
}
.feature-cell__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--paper-silk);
  margin: 0 0 0.7rem 0;
}
.feature-cell__note {
  font-family: var(--font-body);
  color: var(--text-soft);
  font-size: 0.92rem;
  line-height: 1.55;
  margin: 0;
}

/* ---------- WORLD · full-bleed parallax bg ---------- */
.world--cinematic {
  position: relative;
  isolation: isolate;
  text-align: center;
  padding: var(--section-pad) var(--gutter);
  overflow: hidden;
}
.world__bg {
  position: absolute;
  inset: -10% 0;
  z-index: -2;
  background-image: url("../assets/promo/page_bg_generated_english.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.32;
  filter: contrast(1.1) saturate(0.7) brightness(0.6);
  will-change: transform;
}
.world__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at center, transparent 0%, transparent 50%, var(--bg-deep) 100%),
    linear-gradient(180deg, var(--bg-deep) 0%, transparent 30%, transparent 70%, var(--bg-deep) 100%);
  pointer-events: none;
}
.world--cinematic .starshard__inner {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.world--cinematic h2 { margin-bottom: 2rem; }
.world--cinematic p {
  font-style: italic;
  font-size: clamp(1.1rem, 1.6vw, 1.28rem);
  line-height: 1.85;
  color: var(--text-primary);
  max-width: 58ch;
  margin: 0 auto;
  letter-spacing: 0.01em;
}

/* ---------- GALLERY · Steam capsule bento ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: minmax(280px, auto);
  gap: 1rem;
  margin-top: 3rem;
  perspective: 1600px;
}
@media (max-width: 880px) {
  .gallery-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
}
.gallery-cell {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--rule-faint);
  background: var(--bg-ink);
  transform-style: preserve-3d;
  transform:
    perspective(1400px)
    rotateX(var(--rx, 0deg))
    rotateY(var(--ry, 0deg))
    translateZ(0);
  transition:
    transform 0.5s var(--ease-cinematic),
    border-color 0.45s var(--ease-torch),
    box-shadow 0.5s var(--ease-cinematic);
  will-change: transform;
}
.gallery-cell--lg {
  grid-row: span 2;
}
.gallery-cell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.85) saturate(0.95);
  transition: filter 0.55s var(--ease-torch), transform 0.7s var(--ease-cinematic);
}
.gallery-cell:hover {
  border-color: var(--metal-gold);
  box-shadow: var(--shadow-card-deep);
}
.gallery-cell:hover img {
  filter: brightness(1.05) saturate(1.1);
  transform: scale(1.03);
}
.gallery-cell figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.7rem 1rem;
  background: linear-gradient(0deg, rgba(17,10,6,0.92) 0%, rgba(17,10,6,0) 100%);
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--paper-silk);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.45s var(--ease-torch), transform 0.45s var(--ease-cinematic);
}
.gallery-cell:hover figcaption {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Nav link 现代下划线动画 ---------- */
.nav-links a {
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  right: 50%;
  bottom: -4px;
  height: 1px;
  background: var(--metal-gold);
  transition: left 0.35s var(--ease-cinematic), right 0.35s var(--ease-cinematic);
}
.nav-links a:hover::after {
  left: 0;
  right: 0;
}

/* ---------- Reduced motion: 关掉 expensive 动画 ---------- */
@media (prefers-reduced-motion: reduce) {
  .embers-layer,
  .hero__video { display: none !important; }
  .codex__entry,
  .feature-cell,
  .gallery-cell { transform: none !important; }
}