/* ============================================================
   元屿立方 Metaisle Cube — 设计系统
   现代极简 · 黑白单色系 · 大圆角卡面
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 色彩：黑白灰单色系 */
  --black: #0b0b0b;
  --ink: #161616;
  --ink-2: #2e2e2e;
  --gray-600: #565656;
  --gray-500: #787878;
  --gray-400: #a1a1a1;
  --gray-300: #c9c9c9;
  --line: #e6e6e6;
  --line-soft: #efefef;
  --bg: #ffffff;
  --bg-soft: #f7f7f7;
  --bg-dark: #0b0b0b;
  --bg-dark-2: #141414;

  /* 大圆角规范 */
  --r-sm: 14px;
  --r-md: 20px;
  --r-lg: 28px;
  --r-xl: 36px;
  --r-2xl: 44px;
  --r-full: 999px;

  /* 字体 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-en: "Segoe UI", -apple-system, BlinkMacSystemFont, Arial, sans-serif;

  /* 阴影（轻柔、单色） */
  --shadow-sm: 0 1px 2px rgba(11, 11, 11, 0.04);
  --shadow-md: 0 8px 24px -8px rgba(11, 11, 11, 0.10);
  --shadow-lg: 0 24px 48px -16px rgba(11, 11, 11, 0.16);

  /* 布局 */
  --container: 1200px;
  --gutter: clamp(20px, 5vw, 48px);
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }

::selection { background: var(--black); color: #fff; }

/* ---------- 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(72px, 10vw, 128px); }
.section--tight { padding-block: clamp(56px, 7vw, 88px); }
/* 全站统一白色背景，不再使用灰色色块 */
.section--soft { background: var(--bg); }
.section--dark { background: var(--bg-dark); color: #fff; }
.section--dark .eyebrow { color: var(--gray-400); }
.section--dark .section-title { color: #fff; }
.section--dark .section-desc { color: var(--gray-400); }

.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 章节标题 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 16px;
}
.eyebrow::before {
  content: "✦";
  font-size: 12px;
  color: var(--black);
}
.section--dark .eyebrow::before { color: #fff; }

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.section-desc {
  margin-top: 16px;
  max-width: 640px;
  font-size: 16px;
  color: var(--gray-600);
}

.section-head { margin-bottom: clamp(36px, 5vw, 56px); }
.section-head--center { text-align: center; }
.section-head--center .section-desc { margin-inline: auto; }

/* ---------- 按钮（全圆角） ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 52px;
  padding-inline: 32px;
  border-radius: var(--r-full);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease,
    border-color 0.25s ease;
  will-change: transform;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn--primary {
  background: var(--black);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: #232323;
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--line);
}
.btn--ghost:hover { border-color: var(--black); transform: translateY(-2px); }

.btn--light {
  background: #fff;
  color: var(--black);
  box-shadow: var(--shadow-md);
}
.btn--light:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.btn--outline-light {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
}
.btn--outline-light:hover { border-color: #fff; transform: translateY(-2px); }

.btn--sm { height: 42px; padding-inline: 22px; font-size: 14px; }
.btn--lg { height: 56px; padding-inline: 36px; font-size: 16px; }
.btn--block { width: 100%; }

.btn .arrow { transition: transform 0.25s ease; }
.btn:hover .arrow { transform: translateX(4px); }

.btn .star {
  display: inline-block;
  font-size: 0.82em;
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.btn:hover .star { transform: rotate(90deg) scale(1.12); }

/* ---------- 头部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom-color: var(--line);
}

.header-inner {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}
.brand img { width: 36px; height: 36px; }
.brand-name { font-size: 17px; letter-spacing: 0.01em; line-height: 1.2; }
.brand-name small {
  display: block;
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--gray-500);
}

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  position: relative;
  padding: 8px 16px;
  border-radius: var(--r-full);
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-600);
  transition: color 0.2s ease, background 0.2s ease;
}
.site-nav a:hover { color: var(--black); background: var(--bg-soft); }
.site-nav a.is-active { color: var(--black); font-weight: 600; }
.site-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 1px;
  transform: translateX(-50%);
  width: 16px;
  height: 3px;
  border-radius: 2px;
  background: var(--black);
}

.header-cta { display: flex; align-items: center; gap: 12px; }

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--r-full);
  border: 1.5px solid var(--line);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉 */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  z-index: 99;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  padding: 16px var(--gutter) 28px;
  display: none;
  flex-direction: column;
  gap: 4px;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.mobile-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-nav a {
  padding: 14px 18px;
  border-radius: var(--r-md);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}
.mobile-nav a:hover, .mobile-nav a.is-active { background: var(--bg-soft); }
.mobile-nav .btn { margin-top: 12px; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--bg-dark);
  color: var(--gray-400);
  padding-block: 64px 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand img { width: 44px; height: 44px; margin-bottom: 16px; }
.footer-brand .brand-name { color: #fff; font-size: 18px; }
.footer-brand p { margin-top: 14px; font-size: 14px; max-width: 280px; line-height: 1.8; }
.footer-col h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}
.footer-col a { display: block; padding: 6px 0; font-size: 14px; transition: color 0.2s ease; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
}
.footer-bottom .slogan { letter-spacing: 0.2em; }

/* ============================================================
   首页 Hero（全屏封面）
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow: hidden;
}

/* 背景几何装饰：淡网格 + 光晕 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  top: -180px;
  right: -120px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(11,11,11,0.05) 0%, transparent 65%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.45; }
}

.hero-title {
  font-size: clamp(56px, 8.4vw, 104px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--black);
}
.hero-title .en {
  display: block;
  font-family: var(--font-en);
  font-size: clamp(15px, 1.6vw, 19px);
  font-weight: 700;
  letter-spacing: 0.42em;
  color: var(--gray-500);
  margin-bottom: 20px;
}
.hero-actions { margin-top: 48px; display: flex; flex-wrap: wrap; gap: 14px; }

/* Hero 视觉：浮动 LOGO */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 380px;
}
.float-logo {
  width: min(300px, 62vw);
  animation: logo-float 6.5s ease-in-out infinite;
  filter: drop-shadow(0 24px 48px rgba(11, 11, 11, 0.12));
}
@keyframes logo-float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-22px) rotate(2.5deg); }
}

.hero-visual .sparkle {
  position: absolute;
  font-size: 20px;
  color: var(--black);
  animation: twinkle 3s ease-in-out infinite;
}
.hero-visual .sparkle:nth-child(3) { top: 8%; left: 12%; animation-delay: 0.4s; }
.hero-visual .sparkle:nth-child(4) { bottom: 14%; right: 8%; font-size: 26px; animation-delay: 1.2s; }
.hero-visual .sparkle:nth-child(5) { top: 20%; right: 18%; font-size: 14px; animation-delay: 2s; }

@keyframes twinkle {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 1; }
  50% { transform: scale(0.6) rotate(90deg); opacity: 0.4; }
}

/* 合作品牌条 / 关键词滚动带 */
.marquee-band {
  border-block: 1px solid var(--line);
  padding-block: 22px;
  overflow: hidden;
  background: #fff;
}
.marquee-track {
  display: flex;
  gap: 56px;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.marquee-track span {
  display: inline-flex;
  align-items: center;
  gap: 56px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--gray-400);
  white-space: nowrap;
}
.marquee-track span::after { content: "✦"; font-size: 11px; color: var(--gray-300); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ============================================================
   卡片系统（大圆角）
   ============================================================ */
.card {
  position: relative;
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: var(--r-xl);
  padding: clamp(28px, 3.4vw, 40px);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.35s ease, border-color 0.35s ease;
}
.card--hover:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--gray-300);
}
.card--soft { background: #fff; border-color: var(--line); }
.card--dark { background: var(--bg-dark-2); border-color: rgba(255,255,255,0.12); color: #fff; }

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--r-md);
  background: var(--black);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 22px;
}
.card-icon--soft { background: #fff; border: 1.5px solid var(--line); color: var(--black); }

.card-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
}
.card-title .en {
  display: block;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gray-400);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.card-text { font-size: 15px; color: var(--gray-600); }
.card-text a {
  color: var(--ink);
  font-weight: 600;
  border-bottom: 1.5px solid var(--line);
  border-radius: 4px;
  transition: border-color 0.2s ease;
}
.card-text a:hover { border-bottom-color: var(--black); }
.card--dark .card-text { color: var(--gray-400); }

/* 编号卡片（核心主张） */
.value-card { overflow: hidden; }
.value-card .num {
  font-family: var(--font-en);
  font-size: 64px;
  font-weight: 800;
  line-height: 1;
  color: var(--line);
  margin-bottom: 18px;
  transition: color 0.35s ease;
}
.value-card:hover .num { color: var(--black); }
.value-card::after {
  content: "";
  position: absolute;
  inset: auto -30% -60% auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(11,11,11,0.06), transparent 70%);
  opacity: 0;
  transition: opacity 0.35s ease;
}
.value-card:hover::after { opacity: 1; }

/* ---------- 业务结构卡片 ---------- */
.layer-card { display: flex; flex-direction: column; gap: 0; padding: 0; overflow: hidden; }
.layer-card .layer-head {
  padding: 28px 32px 24px;
  border-bottom: 1.5px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.layer-card .layer-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gray-500);
}
.layer-card .layer-no {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 800;
  color: #fff;
  background: var(--black);
  border-radius: var(--r-full);
  padding: 4px 14px;
}
.layer-card .layer-body { padding: 28px 32px 32px; }
.layer-card .layer-title { font-size: 24px; font-weight: 800; margin-bottom: 4px; }
.layer-card .layer-sub { font-size: 13px; color: var(--gray-500); margin-bottom: 16px; letter-spacing: 0.04em; }
.layer-card ul { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.layer-card li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.65;
}
.layer-card li::before {
  content: "✦";
  color: var(--black);
  font-size: 12px;
  line-height: 1.9;
  flex-shrink: 0;
}
.layer-card--dark { background: var(--bg-dark-2); border-color: rgba(255,255,255,0.12); color: #fff; }
.layer-card--dark .layer-head { border-bottom-color: rgba(255,255,255,0.14); }
.layer-card--dark .layer-tag { color: var(--gray-400); }
.layer-card--dark .layer-no { background: #fff; color: var(--black); }
.layer-card--dark .layer-sub { color: var(--gray-400); }
.layer-card--dark li { color: var(--gray-400); }
.layer-card--dark li::before { color: #fff; }

/* ---------- 品牌释义（元屿 / 立方） ---------- */
.meaning-card { text-align: left; }
.meaning-card .glyph {
  font-size: clamp(56px, 7vw, 88px);
  font-weight: 900;
  line-height: 1;
  margin-bottom: 8px;
}
.meaning-card .glyph .sub {
  display: block;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--gray-400);
  margin-top: 12px;
}
.meaning-card p { margin-top: 16px; color: var(--gray-600); font-size: 15.5px; }
.meaning-card .quote {
  margin-top: 20px;
  padding: 18px 22px;
  background: var(--bg-soft);
  border-radius: var(--r-md);
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.8;
}
.meaning-card .quote b { color: var(--black); }

/* ---------- 清单（对勾列表） ---------- */
.checklist { margin-top: 22px; display: flex; flex-direction: column; gap: 10px; }
.checklist li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 14.5px;
  color: var(--ink-2);
}
.checklist li::before {
  content: "✓";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--black);
  color: #fff;
  font-size: 12px;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ---------- 引言横幅（深色） ---------- */
.quote-band {
  position: relative;
  border-radius: var(--r-2xl);
  padding: clamp(48px, 7vw, 88px) clamp(32px, 6vw, 96px);
  overflow: hidden;
  text-align: center;
}
.quote-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(255,255,255,0.07), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(255,255,255,0.05), transparent 40%);
}
.quote-band .q {
  position: relative;
  font-size: clamp(22px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.5;
  max-width: 820px;
  margin-inline: auto;
}
.quote-band .q .hl { border-bottom: 3px solid rgba(255,255,255,0.5); }
.quote-band .q-en {
  position: relative;
  margin-top: 22px;
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--gray-400);
  text-transform: uppercase;
}

/* ---------- CTA 横幅 ---------- */
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  background: var(--bg-dark);
  color: #fff;
  border-radius: var(--r-2xl);
  padding: clamp(40px, 6vw, 72px) clamp(32px, 5vw, 72px);
}
.cta-band h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; line-height: 1.3; }
.cta-band p { margin-top: 12px; color: var(--gray-400); max-width: 480px; }
.cta-band .actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 页面 Hero（子页） ---------- */
.page-hero {
  padding-top: calc(var(--header-h) + clamp(56px, 8vw, 104px));
  padding-bottom: clamp(48px, 6vw, 72px);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero .crumb {
  font-size: 13px;
  color: var(--gray-500);
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.page-hero .crumb b { color: var(--ink); font-weight: 600; }
.page-hero h1 {
  font-size: clamp(36px, 5.4vw, 60px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.01em;
}
.page-hero h1 .en {
  display: block;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.36em;
  color: var(--gray-500);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.page-hero .lead {
  margin-top: 20px;
  max-width: 620px;
  font-size: 17px;
  color: var(--gray-600);
}

/* ---------- 关于页：双栏 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
}
.split--swap .split-media { order: 2; }
.split-media {
  border-radius: var(--r-2xl);
  overflow: hidden;
  background: var(--bg-soft);
  border: 1.5px solid var(--line);
}
.split-media img { width: 100%; }
.split-body .section-title { text-align: left; }
.split-body p { margin-top: 16px; color: var(--gray-600); }
.split-body p b { color: var(--ink); }

/* ---------- 加入我们 ---------- */
.role-card { display: flex; flex-direction: column; }
.role-card .role-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}
.role-card .role-type {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gray-500);
  border: 1.5px solid var(--line);
  border-radius: var(--r-full);
  padding: 5px 14px;
}
.role-card .role-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink);
}
.role-card .role-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse 2.4s ease infinite;
}
.role-card h3 { font-size: 21px; font-weight: 800; margin-bottom: 10px; }
.role-card > p { font-size: 14.5px; color: var(--gray-600); }
.role-card .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.role-card .tags span {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-2);
  background: var(--bg-soft);
  border-radius: var(--r-full);
  padding: 5px 14px;
}

/* 表单 */
.apply-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}
.apply-form {
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: var(--r-2xl);
  padding: clamp(28px, 4vw, 44px);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 18px; }
.form-field label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink-2);
}
.form-field label i { font-style: normal; color: var(--gray-400); }
.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  background: var(--bg-soft);
  border: 1.5px solid transparent;
  border-radius: var(--r-md);
  padding: 13px 16px;
  font-size: 15px;
  transition: border-color 0.25s ease, background 0.25s ease;
  appearance: none;
}
.form-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23565656' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--black);
  background: #fff;
}
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--gray-400); }

.form-success {
  display: none;
  text-align: center;
  padding: 48px 24px;
}
.form-success.is-visible { display: block; }
.form-success .ok {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--black);
  color: #fff;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.form-success h3 { font-size: 22px; font-weight: 800; margin-bottom: 10px; }
.form-success p { color: var(--gray-600); font-size: 15px; max-width: 360px; margin-inline: auto; }

/* FAQ */
.faq-item {
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: var(--r-lg);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}
.faq-item[open] { border-color: var(--gray-300); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  font-size: 16.5px;
  font-weight: 700;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 400;
  color: var(--gray-400);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); color: var(--black); }
.faq-item .faq-body { padding: 0 28px 24px; color: var(--gray-600); font-size: 15px; }

/* 文化/收获清单 */
.perk {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 24px;
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: var(--r-lg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.perk:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.perk .perk-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--r-sm);
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.perk h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.perk p { font-size: 14px; color: var(--gray-600); line-height: 1.7; }

/* ---------- 滚动显现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.8, 0.2, 1),
    transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }
.reveal-d4 { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { min-height: 300px; order: -1; }
  .float-logo { width: min(230px, 58vw); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .apply-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .site-nav, .header-cta .btn { display: none; }
  .nav-toggle { display: flex; }
  .mobile-nav { display: flex; }
  .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .split--swap .split-media { order: 0; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-band { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .grid--4 { grid-template-columns: 1fr; }
  .card { border-radius: var(--r-lg); }
  .hero-actions .btn { width: 100%; }
}

/* ============================================================
   玻璃揭示过渡层（GR.transitionTo）
   ============================================================ */
body.gr-lock { overflow: hidden; }

.gr-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  animation: gr-fade-in 0.45s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  cursor: pointer;
}
.gr-overlay.gr-out { animation: gr-fade-out 0.45s ease forwards; }
@keyframes gr-fade-in { to { opacity: 1; } }
@keyframes gr-fade-out { to { opacity: 0; } }

.gr-stage {
  position: fixed;
  inset: 0;
  z-index: 10000;
  pointer-events: none;
}

.gr-hint {
  position: fixed;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10001;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--gray-400);
  pointer-events: none;
  animation: gr-hint-pulse 2.4s ease infinite;
}
@keyframes gr-hint-pulse { 0%,100% { opacity: 0.5; } 50% { opacity: 1; } }

/* ============================================================
   Slogan 排版（探索，永无止境）
   ============================================================ */
.q--slogan {
  letter-spacing: 0.16em;
  font-weight: 900;
}
.q--slogan .hl { border-bottom-width: 5px; }

/* 黑色引言卡片中的高亮词不画下划线 */
.hl--plain { border-bottom: none !important; }

/* 不换行工具类 */
.nowrap { white-space: nowrap; }

/* 单行文案（不换行） */
.one-line {
  white-space: nowrap;
  font-size: clamp(11.5px, 1.8vw, 15.5px);
}

/* 页面渐入（过渡跳转衔接） */
body.page-fade { animation: page-in 0.55s cubic-bezier(0.2, 0.8, 0.2, 1) both; }
@keyframes page-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  body.page-fade { animation: none; }
}

/* ============================================================
   SVG 图标（替代 emoji）
   ============================================================ */
.icon {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon--filled { fill: currentColor; stroke: none; }
.card-icon .icon { width: 26px; height: 26px; }
.perk-icon .icon { width: 22px; height: 22px; }

/* ============================================================
   开源项目页（纵向长矩形卡片）
   ============================================================ */
.os-list { display: flex; flex-direction: column; gap: 28px; }

.os-card {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: var(--r-2xl);
  padding: clamp(32px, 4vw, 52px);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.35s ease, border-color 0.35s ease;
}
.os-card--hover:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--gray-300);
}
.os-card .os-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gray-500);
  margin-bottom: 16px;
}
.os-card h3 {
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 900;
  line-height: 1.25;
}
.os-card h3 .en {
  display: block;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--gray-400);
  margin-top: 6px;
}
.os-card .os-desc {
  margin-top: 16px;
  color: var(--gray-600);
  font-size: 15.5px;
  max-width: 520px;
}
.os-meta {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-size: 13.5px;
  color: var(--gray-500);
}
.os-meta span { display: inline-flex; align-items: center; gap: 7px; }
.os-meta .icon { width: 15px; height: 15px; }
.os-meta b { color: var(--ink); font-weight: 700; }
.os-card .os-side { display: flex; flex-direction: column; gap: 18px; }
.os-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.os-tags span {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-2);
  border: 1.5px solid var(--line);
  border-radius: var(--r-full);
  padding: 5px 14px;
}
.os-card--ghost {
  border-style: dashed;
  background: transparent;
  text-align: center;
  display: block;
  padding: clamp(40px, 6vw, 64px);
}
.os-card--ghost .os-kicker { margin-bottom: 10px; }
.os-card--ghost h3 { font-size: 20px; font-weight: 700; }
.os-card--ghost p { margin-top: 8px; color: var(--gray-500); font-size: 14px; }

/* ============================================================
   探索页（explore）
   ============================================================ */
.explore-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
}
.explore-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
  pointer-events: none;
}
.explore-hero .container { position: relative; z-index: 1; }
.explore-stage {
  width: min(340px, 70vw);
  aspect-ratio: 1;
  margin: 0 auto clamp(32px, 5vw, 56px);
  border-radius: var(--r-2xl);
  cursor: pointer;
  overflow: hidden;
}
.explore-hero .eyebrow { justify-content: center; display: flex; }
.explore-title {
  text-align: center;
  font-size: clamp(56px, 10vw, 128px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: 0.02em;
}
.explore-title .en {
  display: block;
  font-family: var(--font-en);
  font-size: clamp(14px, 1.5vw, 18px);
  font-weight: 700;
  letter-spacing: 0.42em;
  color: var(--gray-500);
  margin-bottom: 20px;
}
.explore-lead {
  margin: 26px auto 0;
  max-width: 560px;
  text-align: center;
  color: var(--gray-600);
  font-size: 16.5px;
}
.explore-actions {
  margin-top: 40px;
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* 宣言大字段落 */
.manifesto { display: flex; flex-direction: column; gap: clamp(48px, 8vw, 104px); }
.manifesto-line { max-width: 880px; }
.manifesto-line .m-index {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.3em;
  color: var(--gray-400);
  display: block;
  margin-bottom: 18px;
}
.manifesto-line h2 {
  font-size: clamp(30px, 4.6vw, 56px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: 0.01em;
}
.manifesto-line h2 .hl { border-bottom: 4px solid var(--black); }
.manifesto-line p {
  margin-top: 18px;
  font-size: 16.5px;
  color: var(--gray-600);
  max-width: 640px;
}
.manifesto-line--right { margin-left: auto; text-align: right; }
.manifesto-line--right p { margin-left: auto; }
.manifesto-line--center { margin-inline: auto; text-align: center; }
.manifesto-line--center p { margin-inline: auto; }

/* ============================================================
   抖动点阵页脚（Dithered Footer）
   ============================================================ */
.df-footer {
  position: relative;
  overflow: hidden;
  border-top: 1.5px solid var(--line);
  background: #fff;
  color: var(--ink);
}
.df-grid {
  max-width: var(--container);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding: 56px var(--gutter) 20px;
}
.df-brand {
  display: inline-block;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
  border-radius: 8px;
}
.df-brand small {
  display: block;
  font-family: var(--font-en);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.26em;
  color: var(--gray-500);
  margin-top: 3px;
}
.df-tagline {
  margin-top: 16px;
  max-width: 300px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray-600);
}
.df-subscribe { margin-top: 28px; max-width: 300px; }
.df-subscribe label { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 10px; }
.df-sub-row { display: flex; gap: 8px; }
.df-sub-row input {
  flex: 1;
  min-width: 0;
  height: 42px;
  border: 1.5px solid var(--line);
  border-radius: var(--r-full);
  background: #fff;
  padding: 0 18px;
  font-size: 14px;
  transition: border-color 0.25s ease;
}
.df-sub-row input:focus { outline: none; border-color: var(--black); }
.df-sub-row button {
  height: 42px;
  padding-inline: 20px;
  border-radius: var(--r-full);
  background: var(--black);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.25s ease, opacity 0.25s ease;
  white-space: nowrap;
}
.df-sub-row button:hover { transform: translateY(-1px); opacity: 0.88; }
.df-sub-row button:disabled { opacity: 0.5; cursor: default; }
.df-sub-msg { margin-top: 10px; min-height: 20px; font-size: 13px; color: var(--gray-500); }

.df-col-title {
  font-size: 13.5px;
  font-weight: 700;
  margin-bottom: 16px;
}
.df-col ul { display: flex; flex-direction: column; gap: 10px; }
.df-col a {
  font-size: 14px;
  color: var(--gray-600);
  border-radius: 8px;
  transition: color 0.2s ease;
}
.df-col a:hover { color: var(--black); }

/* 点阵带：品牌名是点阵的间隙 */
.df-band {
  position: relative;
  height: clamp(180px, 24vw, 260px);
  overflow: hidden;
}
.df-field { position: absolute; inset: 0; }
.df-field.df-lit {
  -webkit-mask-image: radial-gradient(circle 190px at var(--df-x, 50%) var(--df-y, 50%), #000 35%, rgb(0 0 0 / 0.22) 100%);
  mask-image: radial-gradient(circle 190px at var(--df-x, 50%) var(--df-y, 50%), #000 35%, rgb(0 0 0 / 0.22) 100%);
}
.df-dots {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--df-accent, #0b0b0b);
  background-image: radial-gradient(circle, #000 0.9px, transparent 1.3px);
  background-size: 4px 4px;
  /* 抖动只作为一层固定 mask：密度梯度由上至下由疏到密 */
  -webkit-mask-image: url('data:image/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27360%27%20height%3D%27240%27%3E%3Cdefs%3E%3ClinearGradient%20id%3D%27g%27%20x1%3D%270%27%20y1%3D%270%27%20x2%3D%270%27%20y2%3D%271%27%3E%3Cstop%20offset%3D%270.04%27%20stop-color%3D%27%23000%27%2F%3E%3Cstop%20offset%3D%270.96%27%20stop-color%3D%27%23fff%27%2F%3E%3C%2FlinearGradient%3E%3Cfilter%20id%3D%27f%27%20x%3D%270%27%20y%3D%270%27%20width%3D%27100%25%27%20height%3D%27100%25%27%20color-interpolation-filters%3D%27sRGB%27%3E%3CfeTurbulence%20type%3D%27fractalNoise%27%20baseFrequency%3D%270.45%27%20numOctaves%3D%272%27%20seed%3D%277%27%20stitchTiles%3D%27stitch%27%20result%3D%27n%27%2F%3E%3CfeColorMatrix%20in%3D%27n%27%20type%3D%27matrix%27%20values%3D%271%200%200%200%200%201%200%200%200%200%201%200%200%200%200%200%200%200%200%201%27%20result%3D%27ng%27%2F%3E%3CfeComposite%20in%3D%27SourceGraphic%27%20in2%3D%27ng%27%20operator%3D%27arithmetic%27%20k2%3D%270.5%27%20k3%3D%270.5%27%20result%3D%27s%27%2F%3E%3CfeComponentTransfer%20in%3D%27s%27%20result%3D%27t%27%3E%3CfeFuncR%20type%3D%27discrete%27%20tableValues%3D%270%201%27%2F%3E%3C%2FfeComponentTransfer%3E%3CfeColorMatrix%20in%3D%27t%27%20type%3D%27matrix%27%20values%3D%270%200%200%200%201%200%200%200%200%200.5%200%200%200%200%200%201%200%200%200%200%27%2F%3E%3C%2Ffilter%3E%3C%2Fdefs%3E%3Crect%20width%3D%27100%25%27%20height%3D%27100%25%27%20fill%3D%27url%28%23g%29%27%20filter%3D%27url%28%23f%29%27%2F%3E%3C%2Fsvg%3E');
  mask-image: url('data:image/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27360%27%20height%3D%27240%27%3E%3Cdefs%3E%3ClinearGradient%20id%3D%27g%27%20x1%3D%270%27%20y1%3D%270%27%20x2%3D%270%27%20y2%3D%271%27%3E%3Cstop%20offset%3D%270.04%27%20stop-color%3D%27%23000%27%2F%3E%3Cstop%20offset%3D%270.96%27%20stop-color%3D%27%23fff%27%2F%3E%3C%2FlinearGradient%3E%3Cfilter%20id%3D%27f%27%20x%3D%270%27%20y%3D%270%27%20width%3D%27100%25%27%20height%3D%27100%25%27%20color-interpolation-filters%3D%27sRGB%27%3E%3CfeTurbulence%20type%3D%27fractalNoise%27%20baseFrequency%3D%270.45%27%20numOctaves%3D%272%27%20seed%3D%277%27%20stitchTiles%3D%27stitch%27%20result%3D%27n%27%2F%3E%3CfeColorMatrix%20in%3D%27n%27%20type%3D%27matrix%27%20values%3D%271%200%200%200%200%201%200%200%200%200%201%200%200%200%200%200%200%200%200%201%27%20result%3D%27ng%27%2F%3E%3CfeComposite%20in%3D%27SourceGraphic%27%20in2%3D%27ng%27%20operator%3D%27arithmetic%27%20k2%3D%270.5%27%20k3%3D%270.5%27%20result%3D%27s%27%2F%3E%3CfeComponentTransfer%20in%3D%27s%27%20result%3D%27t%27%3E%3CfeFuncR%20type%3D%27discrete%27%20tableValues%3D%270%201%27%2F%3E%3C%2FfeComponentTransfer%3E%3CfeColorMatrix%20in%3D%27t%27%20type%3D%27matrix%27%20values%3D%270%200%200%200%201%200%200%200%200%200.5%200%200%200%200%200%201%200%200%200%200%27%2F%3E%3C%2Ffilter%3E%3C%2Fdefs%3E%3Crect%20width%3D%27100%25%27%20height%3D%27100%25%27%20fill%3D%27url%28%23g%29%27%20filter%3D%27url%28%23f%29%27%2F%3E%3C%2Fsvg%3E');
  -webkit-mask-size: 360px 240px;
  mask-size: 360px 240px;
  -webkit-mask-repeat: repeat-x;
  mask-repeat: repeat-x;
  -webkit-mask-position: left bottom;
  mask-position: left bottom;
}
@media (prefers-reduced-motion: no-preference) {
  /* 背景按 1px 整步漂移：圆点边缘不做小数抗锯齿，彻底消除细微闪烁 */
  .df-dots { animation: df-drift 40s steps(360, end) infinite; }
  @supports (animation-timeline: view()) {
    .df-band { view-timeline: --df-band; }
    .df-mark { animation: df-rise linear both; animation-timeline: --df-band; animation-range: entry 20% entry 100%; }
  }
}
@keyframes df-drift {
  from { background-position: 0 0; }
  to { background-position: -360px 0; }
}
@keyframes df-rise { from { translate: 0 30%; } }

.df-mark {
  position: absolute;
  bottom: -0.06em;
  left: clamp(12px, 3vw, 28px);
  font-size: clamp(4.5rem, 20vw, 12rem);
  font-weight: 900;
  line-height: 0.8;
  letter-spacing: 0.02em;
  color: #fff;
  pointer-events: none;
  user-select: none;
}
.df-mark small {
  display: block;
  font-family: var(--font-en);
  font-size: 0.09em;
  font-weight: 700;
  letter-spacing: 0.5em;
  margin-top: 0.35em;
  margin-left: 0.3em;
}

.df-social {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: var(--r-sm);
  color: var(--gray-600);
  transition: background 0.2s ease, color 0.2s ease;
}
.df-social:hover { background: rgba(11, 11, 11, 0.05); color: var(--black); }
.df-social .icon { width: 17px; height: 17px; }
.df-divider { width: 1px; height: 18px; background: var(--line); margin-inline: 8px; }
.df-top {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  color: var(--gray-600);
  transition: color 0.2s ease, background 0.2s ease;
}
.df-top:hover { color: var(--black); background: rgba(11, 11, 11, 0.05); }
.df-top .icon { width: 14px; height: 14px; }

@media (max-width: 1024px) {
  .df-grid { grid-template-columns: 1fr 1fr; }
  .os-card { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .df-grid { grid-template-columns: 1fr; gap: 36px; }
  .wr-meta-inner {
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 4px 0 16px;
  }
  .wr-meta-inner p { white-space: normal; }
  .wr-meta-lockup { height: 24px; }
  .wr-meta-left {
    position: static;
    transform: none;
    width: 100%;
    text-align: center;
  }
  .wr-meta-links { flex-wrap: wrap; padding-right: 0; margin-left: 0; }
  .wr-reflection { height: 0.3em; }
}

/* ============================================================
   文字标志揭示页脚（Wordmark Reveal）
   字符从地板线升起 → 倒影淡入 → 悬停 glint 扫光
   ============================================================ */
.wr-wordmark {
  --wm: #0b0b0b;
  --glint: #8a8a8a;
  position: relative;
  margin-top: 8px;
  padding-top: clamp(24px, 3.5vw, 44px);
  user-select: none;
  font-size: clamp(64px, 14vw, 200px);
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-align: left;
}
/* 地板线：字符升起的水平线 */
.wr-floor {
  position: relative;
  height: 1.5px;
  width: 100%;
  background: var(--line);
}
.wr-row {
  position: relative;
  white-space: nowrap;
  text-align: left;
  /* 底部裁至基线附近：字符从线外升起；上/左/右开放避免裁掉悬停位移 */
  clip-path: inset(-60% -20% 0.06em -20%);
  margin-bottom: -0.06em;
}
.wr-letter {
  display: inline-block;
  will-change: transform;
  transform: translateY(110%);
}
.wr-wordmark[data-revealed="true"] .wr-letter {
  transform: translateY(0%);
  transition: transform 0.62s cubic-bezier(0.2, 0.8, 0.2, 1);
  transition-delay: calc(0.3s + var(--i) * 0.07s);
}
.wr-glyph {
  display: inline-block;
  color: var(--wm);
  background-image: linear-gradient(105deg,
    var(--wm) 0%, var(--wm) 46%, var(--glint) 50%, var(--wm) 54%, var(--wm) 100%);
  background-size: 250% 100%;
  background-position: 0% 0%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: transform 0.15s ease-out;
}
.wr-letter:hover .wr-glyph {
  transform: translateY(-6px);
}
.wr-letter.is-glinting .wr-glyph {
  animation: wr-glint 0.64s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes wr-glint {
  from { background-position: 0% 0%; }
  to { background-position: 100% 0%; }
}
/* 倒影：镜像 + 渐隐 */
.wr-reflection {
  position: relative;
  height: 0.42em;
  margin-top: -1px;
  overflow: hidden;
  opacity: 0;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 92%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 92%);
  transition: opacity 0.4s ease-out;
}
.wr-wordmark[data-revealed="true"] .wr-reflection {
  opacity: 0.14;
  transition-delay: 1.23s;
}
.wr-mirror-row {
  white-space: nowrap;
  transform: scaleY(-1);
  color: var(--wm);
  filter: blur(1px);
  line-height: 1;
  text-align: left;
}
/* 倒影区信息层：版权与链接叠在倒影带上，左侧柔白底保证可读 */
.wr-meta-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px 28px;
  flex-wrap: wrap;
  padding: 6px 4px clamp(20px, 2.5vw, 32px);
  font-size: 13.5px;
  line-height: 1.6;
  letter-spacing: normal;
  color: var(--gray-500);
}
.wr-meta-lockup {
  height: 48px;
  width: auto;
  opacity: 0.9;
  flex-shrink: 0;
}
.wr-meta-left {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: block;
}
.wr-meta-left p {
  display: inline-block;
  white-space: nowrap;
  margin: 0;
  vertical-align: baseline;
}
.wr-meta-inner p { white-space: nowrap; margin: 0; }
.wr-meta-links {
  display: flex;
  align-items: center;
  gap: 6px 14px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: auto;
  padding-right: 2px;
}
.wr-meta-links .df-social {
  width: 34px;
  height: 34px;
}
.wr-meta-links .df-top { font-size: 13.5px; gap: 7px; }
.wr-mirror-row span { display: inline-block; }
/* 页脚整体留白调整 */
.wr-footer .df-grid { padding-bottom: 8px; }
.wr-footer .wr-wordmark { margin-top: 0; padding-bottom: 4px; }

@media (prefers-reduced-motion: reduce) {
  .wr-wordmark[data-revealed="true"] .wr-letter { transition: none; }
  .wr-letter.is-glinting .wr-glyph { animation: none; }
}

/* ============================================================
   元屿MIS 页：全屏轮播 + 创意灵感
   ============================================================ */
.mis-hero {
  position: relative;
  height: 100vh;
  min-height: 560px;
  overflow: hidden;
  background: #fff;
}


/* ============================================================
   元屿MIS 页：全屏视频 + 中心标识
   ============================================================ */
.mis-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #fff;
}
/* 中心标识：置顶悬浮，柔白光晕衬托 */
.mis-center-mark {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.mis-center-mark::before {
  content: "";
  position: absolute;
  width: min(430px, 74vw);
  aspect-ratio: 16 / 9;
  border-radius: var(--r-xl);
  background: transparent;
}
.mis-center-mark img {
  position: relative;
  width: min(420px, 70vw);
  animation: mis-mark-in 1.2s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}
@keyframes mis-mark-in {
  from { opacity: 0; transform: scale(0.94); }
  to { opacity: 1; transform: scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .mis-center-mark img { animation: none; }
}

/* 创意灵感卡片 */
.inspiration-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.insp-card {
  position: relative;
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: var(--r-xl);
  padding: clamp(28px, 3.4vw, 40px);
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.35s ease, border-color 0.35s ease;
}
.insp-card--hover:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--gray-300);
}
.insp-card .insp-no {
  font-family: var(--font-en);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--gray-400);
  display: block;
  margin-bottom: 20px;
}
.insp-card blockquote {
  font-size: clamp(17px, 1.6vw, 20px);
  font-weight: 700;
  line-height: 1.65;
  color: var(--ink);
}
.insp-card .insp-src {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-500);
}
.insp-card .insp-src::before {
  content: "";
  width: 18px;
  height: 1.5px;
  background: var(--gray-400);
}
.insp-card::after {
  content: "✦";
  position: absolute;
  right: 18px;
  bottom: 10px;
  font-size: 44px;
  color: var(--line);
  pointer-events: none;
  transition: color 0.35s ease;
}
.insp-card--hover:hover::after { color: var(--gray-300); }
/* 灵感关键词带 */
.insp-tags {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.insp-tags span {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-2);
  border: 1.5px solid var(--line);
  border-radius: var(--r-full);
  padding: 8px 18px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.insp-tags span:hover { border-color: var(--black); transform: translateY(-2px); }

@media (max-width: 1024px) {
  .inspiration-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .inspiration-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   联系我们（join 页）：联系卡 + 订阅
   ============================================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.contact-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.contact-link {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--black);
  border-bottom: 2px solid var(--black);
  padding-bottom: 2px;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.contact-link:hover { opacity: 0.7; transform: translateY(-1px); }


@media (max-width: 768px) {
  .contact-layout { grid-template-columns: 1fr; }
}

/* ============================================================
   元屿MIS 页：顶部未滚动时头部为白色（适配黑色视频背景）
   ============================================================ */
.mis-page .brand-logo { width: 36px; height: 36px; }
.mis-page .brand-logo--dark { display: none; }
.mis-page .site-header:not(.is-scrolled) .brand-logo--light { display: inline-block; }
.mis-page .site-header:not(.is-scrolled) .brand-logo--dark { display: none; }
.mis-page .site-header.is-scrolled .brand-logo--light { display: none; }
.mis-page .site-header.is-scrolled .brand-logo--dark { display: inline-block; }
.mis-page .site-header:not(.is-scrolled) .brand-name { color: #fff; }
.mis-page .site-header:not(.is-scrolled) .brand-name small { color: rgba(255, 255, 255, 0.7); }
.mis-page .site-header:not(.is-scrolled) .site-nav a { color: rgba(255, 255, 255, 0.88); }
.mis-page .site-header:not(.is-scrolled) .site-nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.12); }
.mis-page .site-header:not(.is-scrolled) .site-nav a.is-active { color: #fff; }
.mis-page .site-header:not(.is-scrolled) .site-nav a.is-active::after { background: #fff; }
.mis-page .site-header:not(.is-scrolled) .nav-toggle { border-color: rgba(255, 255, 255, 0.5); }
.mis-page .site-header:not(.is-scrolled) .nav-toggle span { background: #fff; }
.mis-page .site-header:not(.is-scrolled) .btn--primary {
  background: #fff;
  color: var(--black);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}
.mis-page .site-header:not(.is-scrolled) .btn--primary:hover { background: #f5f5f5; }

/* 复制提示（邮箱/公众号点击复制） */
.copy-tip {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 4px 12px;
  border-radius: var(--r-full);
  background: var(--black);
  color: #fff;
  font-size: 12px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 10;
}
.copy-tip.is-show { opacity: 1; transform: translateX(-50%) translateY(0); }
.df-social, .contact-link { position: relative; }

/* 版权行小标识 */