/* ==========================================================================
   Mansha Textile · 蔓莎纺织 — 品牌设计系统
   调性：温暖、材质感、可持续叙事；面向中东/东南亚/全球综合市场
   ========================================================================== */

:root {
  /* 主色板 — 取材自天然纤维 + 植物意象 */
  --c-bone:        #f5f1ea;   /* 主背景：原棉骨白 */
  --c-paper:       #ebe4d6;   /* 次背景：手抄纸 */
  --c-ink:         #1a1714;   /* 主文字：墨黑（非纯黑，更柔和） */
  --c-charcoal:    #3a342c;   /* 次文字 */
  --c-ash:         #87807a;   /* 弱化文字（中性灰） */
  --c-line:        #d9d0bf;   /* 分隔线 */

  /* 蔓莎品牌强调色 — 植物意象（去中东风） */
  --c-moss:        #5e6b48;   /* 苔藓绿 — 蔓莎主强调色 */
  --c-leaf:        #8a9c6e;   /* 新芽绿 */
  --c-sage:        #6b7a5a;   /* 鼠尾草绿 */
  --c-canopy:      #3a4a30;   /* 深林绿 — 用于绣花暗部 */

  /* 染料色 — 纺织行业语义 */
  --c-indigo:      #2a3f5c;   /* 靛蓝 */
  --c-thread:      #c4a373;   /* 亚麻纱线色 */
  --c-rust:        #a44a3a;   /* 铁锈红（仅 4 处品牌字斜体） */

  /* 字体 */
  --f-sans:        'Inter', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --f-display:     'Playfair Display', 'Noto Serif SC', Georgia, serif;
  --f-mono:        'JetBrains Mono', 'Courier New', monospace;
  /* 中文优先（切换到中文模式时启用） */
  --f-sans-zh:     'Noto Serif SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --f-display-zh:  'Noto Serif SC', 'STSong', 'SimSun', 'PingFang SC', serif;

  /* 字号 — 模块化 1.250（Major Third） */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.25rem;
  --fs-lg: 1.5rem;
  --fs-xl: 2rem;
  --fs-2xl: 2.75rem;
  --fs-3xl: 4rem;
  --fs-4xl: 5.5rem;
  --fs-5xl: 8rem;

  /* 间距 */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4rem;
  --s-9: 6rem;
  --s-10: 8rem;

  /* 容器 */
  --container-max: 1440px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

/* ============ Reset & 基础 ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background: var(--c-bone);
  color: var(--c-ink);
  font-family: var(--f-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 选区颜色 */
::selection { background: var(--c-ink); color: var(--c-bone); }

/* ============ 排版工具 ============ */
.t-display {
  font-family: var(--f-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 0.95;
}
.t-mono {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.t-cn {
  font-family: 'Noto Serif SC', 'Songti SC', serif;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-ash);
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--c-ash);
}

/* ============ 容器 ============ */
.wrap {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.wrap--full { max-width: 100%; }

/* ============ Header — 半透明 + 滚动后实色 ============ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: var(--s-4) var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  transition: background 0.4s ease, padding 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(245, 241, 234, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--c-line);
  padding: var(--s-3) var(--gutter);
}
.brand {
  display: flex;
  align-items: baseline;
  gap: var(--s-2);
  text-decoration: none;
  color: var(--c-ink);
}
.brand-mark {
  font-family: var(--f-display);
  font-size: var(--fs-md);
  font-weight: 500;
  letter-spacing: -0.01em;
}
.brand-cn {
  font-family: 'Noto Serif SC', serif;
  font-size: var(--fs-sm);
  color: var(--c-ash);
  letter-spacing: 0.2em;
}
.nav {
  display: flex;
  align-items: center;
  gap: var(--s-6);
}
.nav a {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-ink);
  text-decoration: none;
  position: relative;
  padding: var(--s-2) 0;
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0;
  height: 1px;
  background: var(--c-moss);
  transition: width 0.3s ease;
}
.nav a:hover::after,
.nav a.is-active::after { width: 100%; }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-5);
  background: var(--c-ink);
  color: var(--c-bone);
  border-radius: 999px;
  text-decoration: none;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: background 0.3s, transform 0.2s;
}
.nav-cta:hover { background: var(--c-moss); transform: translateY(-1px); }

/* ============ 语言切换器 ============ */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  margin-left: var(--s-4);
  padding-left: var(--s-4);
  border-left: 1px solid var(--c-line);
}
.lang-btn {
  background: none;
  border: 0;
  padding: var(--s-1) var(--s-2);
  cursor: pointer;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  color: var(--c-ash);
  text-transform: uppercase;
  transition: color 0.25s;
  position: relative;
}
.lang-btn:hover { color: var(--c-ink); }
.lang-btn.is-active { color: var(--c-ink); }
.lang-btn.is-active::after {
  content: '';
  position: absolute;
  left: 50%; right: 50%;
  bottom: 2px;
  height: 1px;
  background: var(--c-moss);
  transition: left 0.25s, right 0.25s;
}
.lang-btn.is-active:hover::after { left: 30%; right: 30%; }
.lang-sep {
  width: 1px;
  height: 12px;
  background: var(--c-line);
  display: inline-block;
}

/* 中文模式下：英文字体降权、中文字体加权；视觉更像中文站 */
html[data-lang="zh"] body {
  font-family: var(--f-sans-zh), var(--f-sans);
}
html[data-lang="zh"] .brand-mark,
html[data-lang="zh"] .hero-title,
html[data-lang="zh"] .section-head__title,
html[data-lang="zh"] .cta-title,
html[data-lang="zh"] .page-hero h1,
html[data-lang="zh"] .contact-left h1,
html[data-lang="zh"] .footer-wordmark,
html[data-lang="zh"] .contact-form__title,
html[data-lang="zh"] .pillar h3,
html[data-lang="zh"] .team-card__name,
html[data-lang="zh"] .product-card__name {
  font-family: var(--f-display-zh), var(--f-display);
  letter-spacing: 0.02em;
}
html[data-lang="zh"] .nav a,
html[data-lang="zh"] .lang-btn,
html[data-lang="zh"] .filter-col h4,
html[data-lang="zh"] .contact-info-label,
html[data-lang="zh"] .form-field label,
html[data-lang="zh"] .product-card__specs {
  letter-spacing: 0.08em;
}

/* 移动端：语言切换器藏到汉堡里 */
@media (max-width: 768px) {
  .lang-toggle { display: none; }
}

/* 移动端汉堡 */
.nav-toggle {
  display: none;
  background: none; border: 0;
  width: 36px; height: 36px;
  cursor: pointer;
  color: var(--c-ink);
}

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--s-9);
  padding-bottom: var(--s-8);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--s-7);
  align-items: end;
  position: relative;
  z-index: 2;
}
.hero-title {
  font-size: clamp(3rem, 9vw, var(--fs-5xl));
  letter-spacing: -0.04em;
  line-height: 0.88;
}
.hero-title em {
  font-family: var(--f-display);
  font-style: italic;
  color: var(--c-rust);
  font-weight: 400;
}
.hero-sub {
  margin-top: var(--s-6);
  font-size: var(--fs-md);
  max-width: 36ch;
  color: var(--c-charcoal);
  line-height: 1.5;
}
.hero-meta {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
  align-self: end;
  padding-bottom: var(--s-3);
}
.hero-meta-row {
  display: flex;
  align-items: baseline;
  gap: var(--s-3);
  border-top: 1px solid var(--c-line);
  padding-top: var(--s-3);
}
.hero-meta-num {
  font-family: var(--f-display);
  font-size: var(--fs-2xl);
  letter-spacing: -0.02em;
  line-height: 1;
}
.hero-meta-label {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ash);
}

/* 背景纹理：CSS 模拟织造经纬 */
.hero-weave {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    repeating-linear-gradient(90deg,
      transparent 0 7px,
      rgba(26, 23, 20, 0.04) 7px 8px),
    repeating-linear-gradient(0deg,
      transparent 0 7px,
      rgba(26, 23, 20, 0.04) 7px 8px),
    radial-gradient(ellipse at 25% 25%, rgba(94, 107, 72, 0.18), transparent 55%),
    radial-gradient(ellipse at 75% 70%, rgba(184, 110, 60, 0.14), transparent 60%),
    radial-gradient(ellipse at 50% 100%, rgba(138, 156, 110, 0.12), transparent 65%);
}
.hero-mark {
  position: absolute;
  top: 50%; right: 6%;
  transform: translateY(-50%);
  z-index: 1;
  width: clamp(220px, 28vw, 380px);
  opacity: 0.85;
}
.hero-scroll {
  position: absolute;
  bottom: var(--s-5);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-ash);
}
.hero-scroll-line {
  width: 1px; height: 40px;
  background: var(--c-ink);
  position: relative;
  overflow: hidden;
}
.hero-scroll-line::after {
  content: '';
  position: absolute; top: -100%; left: 0;
  width: 100%; height: 100%;
  background: var(--c-bone);
  animation: scroll-down 2.2s ease-in-out infinite;
}
@keyframes scroll-down {
  0% { top: -100%; }
  100% { top: 100%; }
}

/* ============ 章节通用 ============ */
.section {
  padding: var(--s-10) 0;
  position: relative;
}
.section--tight { padding: var(--s-8) 0; }
.section-head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--s-7);
  align-items: end;
  margin-bottom: var(--s-8);
}
.section-head__title {
  font-size: clamp(2rem, 5vw, var(--fs-3xl));
  letter-spacing: -0.03em;
  line-height: 0.95;
}
.section-head__title em {
  font-style: italic;
  color: var(--c-rust);
  font-family: var(--f-display);
  font-weight: 400;
}
.section-head__desc {
  font-size: var(--fs-md);
  color: var(--c-charcoal);
  max-width: 56ch;
  line-height: 1.55;
}

/* ============ 材质筛选条 ============ */
.fabric-rail {
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  padding: var(--s-5) 0;
  overflow-x: auto;
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.fabric-rail::-webkit-scrollbar { display: none; }
.fabric-rail__inner {
  display: flex;
  gap: var(--s-2);
  align-items: center;
  padding: 0 var(--gutter);
  min-width: max-content;
}
.fabric-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-4);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink);
  transition: all 0.3s ease;
  white-space: nowrap;
}
.fabric-chip__swatch {
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(26, 23, 20, 0.2);
}
.fabric-chip:hover {
  border-color: var(--c-ink);
  transform: translateY(-2px);
}
.fabric-chip.is-active {
  background: var(--c-ink);
  color: var(--c-bone);
  border-color: var(--c-ink);
}

/* ============ 不对称分类网格（核心视觉） ============ */
.asym-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 220px;
  gap: var(--s-4);
}
.tile {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  cursor: pointer;
  background: var(--c-paper);
}
.tile__bg {
  position: absolute; inset: 0;
  transition: transform 0.8s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.tile:hover .tile__bg { transform: scale(1.08); }
.tile__overlay {
  position: absolute; inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--s-5);
  background: linear-gradient(180deg,
    rgba(26, 23, 20, 0) 30%,
    rgba(26, 23, 20, 0.6) 100%);
  color: var(--c-bone);
  z-index: 2;
}
.tile__tag {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  background: rgba(245, 241, 234, 0.9);
  color: var(--c-ink);
  padding: var(--s-2) var(--s-3);
  align-self: flex-start;
  border-radius: 999px;
}
.tile__title {
  font-family: var(--f-display);
  font-size: var(--fs-xl);
  letter-spacing: -0.01em;
  line-height: 1.05;
}
.tile__count {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  opacity: 0.8;
  margin-top: var(--s-2);
}

/* 网格编排：不对称 */
.tile--xl { grid-column: span 7; grid-row: span 2; }
.tile--lg { grid-column: span 5; grid-row: span 2; }
.tile--md { grid-column: span 5; grid-row: span 1; }
.tile--sm { grid-column: span 3; grid-row: span 1; }
.tile--wd { grid-column: span 4; grid-row: span 2; }

/* 网格内各 tile 的颜色主题 — 全部协调到原棉+植物+靛蓝 */
.theme-linen    { background: linear-gradient(135deg, #e6dcc8, #c5b89a); }
.theme-silk     { background: linear-gradient(135deg, #f0e8d8, #c8a888); }
.theme-knit     { background: linear-gradient(135deg, #d4c8b8, #8a7a68); }
.theme-lace     { background: linear-gradient(135deg, #f8f0e4, #d8c8b8); }
.theme-denim    { background: linear-gradient(135deg, #4a5a78, #2a3f5c); }
.theme-jacquard { background: linear-gradient(135deg, #4a4a3a, #2a2a1a); }
.theme-trim     { background: linear-gradient(135deg, #b89870, #6a4a30); }
.theme-button   { background: linear-gradient(135deg, #d8c8a0, #8a7560); }
.theme-embroidery {
  background:
    /* 经纬绣线 */
    repeating-linear-gradient(0deg,  transparent 0 6px, rgba(94,107,72,0.32) 6px 7px),
    repeating-linear-gradient(90deg, transparent 0 6px, rgba(94,107,72,0.32) 6px 7px),
    /* 散落花瓣 */
    radial-gradient(circle at 22% 28%, rgba(138,156,110,0.55) 1.6px, transparent 2.6px),
    radial-gradient(circle at 72% 72%, rgba(138,156,110,0.55) 1.6px, transparent 2.6px),
    radial-gradient(circle at 50% 50%, rgba(196,163,115,0.45) 1.4px, transparent 2.4px),
    /* 米色绣布底 */
    linear-gradient(135deg, #faf5ea 0%, #ece4d0 100%);
}

/* 在主题上叠加纹理 */
.theme-linen::after, .theme-knit::after {
  content: '';
  position: absolute; inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(0,0,0,0.06) 3px 4px),
    repeating-linear-gradient(90deg, transparent 0 3px, rgba(0,0,0,0.06) 3px 4px);
  pointer-events: none;
}
.theme-jacquard::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(45deg, rgba(255,255,255,0.05) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.05) 25%, transparent 25%);
  background-size: 14px 14px;
  pointer-events: none;
}
.theme-lace::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.45) 2px, transparent 3px),
    radial-gradient(circle at 70% 60%, rgba(255,255,255,0.45) 2px, transparent 3px),
    radial-gradient(circle at 40% 80%, rgba(255,255,255,0.45) 2px, transparent 3px);
  background-size: 30px 30px;
  pointer-events: none;
}
.theme-embroidery::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 18% 18%, rgba(58,74,48,0.35) 1.2px, transparent 2.2px),
    radial-gradient(circle at 82% 82%, rgba(58,74,48,0.35) 1.2px, transparent 2.2px),
    radial-gradient(circle at 32% 68%, rgba(196,163,115,0.45) 1.2px, transparent 2.2px),
    radial-gradient(circle at 68% 32%, rgba(196,163,115,0.45) 1.2px, transparent 2.2px);
  background-size: 28px 28px;
  pointer-events: none;
}

/* ============ 数字 — 大字叙事 ============ */
.stat-strip {
  background: var(--c-ink);
  color: var(--c-bone);
  padding: var(--s-9) 0;
}
.stat-strip__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-7);
}
.stat-num {
  font-family: var(--f-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  letter-spacing: -0.03em;
  line-height: 1;
  display: block;
}
.stat-num small {
  font-family: var(--f-mono);
  font-size: 0.4em;
  vertical-align: top;
  margin-left: 0.1em;
  color: var(--c-moss);
}
.stat-label {
  display: block;
  margin-top: var(--s-3);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-ash);
}
.stat-note {
  font-family: var(--f-display);
  font-style: italic;
  color: var(--c-moss);
  font-size: var(--fs-md);
  margin-top: var(--s-2);
}

/* ============ 横向滚动 — 工艺/产品 ============ */
.marquee {
  overflow: hidden;
  position: relative;
  padding: var(--s-6) 0;
}
.marquee__track {
  display: flex;
  gap: var(--s-5);
  animation: marquee 40s linear infinite;
  width: max-content;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee-item {
  width: 320px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.marquee-item__visual {
  height: 380px;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}
.marquee-item__meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ash);
}
.marquee-item__name {
  font-family: var(--f-display);
  font-size: var(--fs-lg);
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============ 关于 — 双栏+时间线 ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--s-9);
  align-items: start;
}
.about-side {
  position: sticky;
  top: var(--s-9);
}
.about-side__photo {
  aspect-ratio: 3/4;
  background:
    radial-gradient(ellipse at 30% 30%, rgba(184, 110, 60, 0.4), transparent 60%),
    linear-gradient(135deg, #c4a888, #6a4a30);
  border-radius: 4px;
  margin-top: var(--s-5);
}
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--s-7);
}
.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--s-5);
  padding-top: var(--s-5);
  border-top: 1px solid var(--c-line);
}
.timeline-year {
  font-family: var(--f-display);
  font-size: var(--fs-xl);
  color: var(--c-rust);
}
.timeline-content h3 {
  font-family: var(--f-display);
  font-size: var(--fs-md);
  margin-bottom: var(--s-2);
}
.timeline-content p {
  color: var(--c-charcoal);
  font-size: var(--fs-base);
  max-width: 56ch;
}

/* ============ 全球分布 — 条形图风格 ============ */
.world-strip {
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  padding: var(--s-7) 0;
}
.world-row {
  display: grid;
  grid-template-columns: 140px 1fr 80px;
  align-items: center;
  gap: var(--s-5);
  padding: var(--s-3) 0;
  border-bottom: 1px dashed var(--c-line);
}
.world-row:last-child { border-bottom: 0; }
.world-name {
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.05em;
}
.world-bar {
  height: 18px;
  background: var(--c-paper);
  position: relative;
  border-radius: 2px;
  overflow: hidden;
}
.world-bar__fill {
  position: absolute;
  inset: 0;
  width: 0;
  background: linear-gradient(90deg, var(--c-moss), var(--c-sage));
  transition: width 1.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.world-pct {
  font-family: var(--f-display);
  font-size: var(--fs-md);
  text-align: right;
  color: var(--c-ash);
}

/* ============ 联系 CTA ============ */
.cta {
  background: var(--c-paper);
  padding: var(--s-10) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: var(--s-5);
}
.cta-title em {
  font-style: italic;
  font-family: var(--f-display);
  color: var(--c-rust);
  font-weight: 400;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: var(--s-3);
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-4) var(--s-6);
  border-radius: 999px;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn--ink { background: var(--c-ink); color: var(--c-bone); }
.btn--ink:hover { background: var(--c-moss); transform: translateY(-2px); }
.btn--ghost { background: transparent; color: var(--c-ink); border-color: var(--c-ink); }
.btn--ghost:hover { background: var(--c-ink); color: var(--c-bone); }

/* ============ Footer ============ */
.footer {
  background: var(--c-ink);
  color: var(--c-bone);
  padding: var(--s-9) 0 var(--s-5);
}
.footer-wordmark {
  font-family: var(--f-display);
  font-size: clamp(3rem, 12vw, 10rem);
  letter-spacing: -0.04em;
  line-height: 0.85;
  color: var(--c-bone);
}
.footer-wordmark em {
  font-style: italic;
  color: var(--c-leaf);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--s-6);
  padding: var(--s-7) 0 var(--s-6);
  border-top: 1px solid rgba(245, 241, 234, 0.15);
  margin-top: var(--s-6);
}
.footer-col h4 {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-leaf);
  margin-bottom: var(--s-4);
}
.footer-col a, .footer-col p {
  display: block;
  color: var(--c-bone);
  text-decoration: none;
  padding: var(--s-1) 0;
  font-size: var(--fs-sm);
  opacity: 0.85;
}
.footer-col a:hover { opacity: 1; color: var(--c-leaf); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--s-5);
  border-top: 1px solid rgba(245, 241, 234, 0.15);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ash);
}

/* ============ 装饰：超大数字背景 ============ */
.bg-numeral {
  position: absolute;
  font-family: var(--f-display);
  font-size: clamp(15rem, 30vw, 35rem);
  line-height: 0.8;
  color: var(--c-line);
  opacity: 0.4;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--s-7); }
  .hero-mark { display: none; }
  .section-head { grid-template-columns: 1fr; gap: var(--s-4); }
  .about-grid { grid-template-columns: 1fr; gap: var(--s-6); }
  .about-side { position: static; }
  .stat-strip__grid { grid-template-columns: repeat(2, 1fr); gap: var(--s-6); }
  .asym-grid { grid-auto-rows: 180px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  :root { --fs-3xl: 3rem; --fs-2xl: 2.25rem; --fs-xl: 1.5rem; }
  .nav { display: none; }
  .nav-toggle { display: block; }
  .tile--xl, .tile--lg, .tile--md, .tile--sm, .tile--wd {
    grid-column: span 12;
    grid-row: span 1;
  }
  .asym-grid { grid-auto-rows: 200px; }
  .stat-strip__grid { grid-template-columns: 1fr; }
  .world-row { grid-template-columns: 100px 1fr 60px; gap: var(--s-3); }
  .footer-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 80px 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--s-3); text-align: center; }
}

/* ============ 入场动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }