/* =========================================================
   FssPHP Open Source Lab — 可换肤主题
   右上角调色盘可切换主色调（--acc-*），其余颜色自动派生
   ========================================================= */

:root {
  /* ===== 主题色基准（右上角调色盘可切换） =====
     只改这 5 个基准色，页面中所有浅色、描边、阴影与渐变都由 color-mix 派生 */
  --acc-400: #5ec8ff;
  --acc-500: #22a6ef;
  --acc-600: #0d8ed5;
  --acc-700: #0a72ae;
  --acc-800: #0a5b8b;
  --acc-300: color-mix(in srgb, var(--acc-400) 62%, #ffffff);

  /* 由主题色派生的色阶 */
  --sky-50:  color-mix(in srgb, var(--acc-400) 9%, #ffffff);
  --sky-100: color-mix(in srgb, var(--acc-400) 19%, #ffffff);
  --sky-200: color-mix(in srgb, var(--acc-400) 38%, #ffffff);
  --sky-300: color-mix(in srgb, var(--acc-400) 66%, #ffffff);
  --sky-400: var(--acc-400);
  --sky-500: var(--acc-500);
  --sky-600: var(--acc-600);
  --sky-700: var(--acc-700);
  --sky-800: var(--acc-800);

  --ink-900: #0a2032;
  --ink-800: #12304a;
  --ink-700: #24435f;
  --ink-600: #3b5b77;
  --ink-500: #5b7893;
  --ink-400: #7f99b0;

  --line:      color-mix(in srgb, var(--acc-700) 13%, transparent);
  --line-soft: color-mix(in srgb, var(--acc-700) 8%, transparent);
  --card:      #ffffff;
  --bg:        color-mix(in srgb, var(--acc-400) 4%, #fbfdff);

  --radius-sm: 12px;
  --radius:    18px;
  --radius-lg: 24px;
  --radius-xl: 30px;

  /* 分层、更柔和的阴影，营造"悬浮"高级感 */
  --shadow-xs: 0 1px 2px color-mix(in srgb, var(--acc-800) 5%, transparent);
  --shadow-sm: 0 6px 18px -8px color-mix(in srgb, var(--acc-800) 10%, transparent);
  --shadow-md: 0 18px 44px -16px color-mix(in srgb, var(--acc-800) 20%, transparent);
  --shadow-lg: 0 34px 80px -28px color-mix(in srgb, var(--acc-800) 30%, transparent);
  --shadow-xl: 0 50px 110px -40px color-mix(in srgb, var(--acc-800) 40%, transparent);

  /* 玻璃质感与品牌渐变 */
  --glass: rgba(255, 255, 255, 0.66);
  --glass-border: rgba(255, 255, 255, 0.6);
  --ring: color-mix(in srgb, var(--acc-500) 28%, transparent);
  --grad-brand: linear-gradient(96deg, var(--acc-600) 0%, color-mix(in srgb, var(--acc-400) 52%, var(--acc-500)) 46%, var(--acc-700) 100%);
  --grad-accent: linear-gradient(135deg, var(--acc-400) 0%, var(--acc-600) 55%, var(--acc-700) 100%);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --container: 1180px;
  --container-wide: 1280px;
  --nav-h: 72px;

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas,
          "Liberation Mono", monospace;
}

/* ---------- 主题色预设 ----------
   每个预设只覆盖 5 个基准色，浅色阶 / 描边 / 阴影 / 渐变会自动跟着变。
   颜色值同时用于右上角调色盘的色点。 */
[data-accent="indigo"] {
  --acc-400: #8b9bff;
  --acc-500: #5b6cf2;
  --acc-600: #4a56e0;
  --acc-700: #3a45b8;
  --acc-800: #2c348c;
}
[data-accent="emerald"] {
  --acc-400: #4ee0ab;
  --acc-500: #10b981;
  --acc-600: #059669;
  --acc-700: #047857;
  --acc-800: #065f46;
}
[data-accent="teal"] {
  --acc-400: #5eead4;
  --acc-500: #14b8a6;
  --acc-600: #0d9488;
  --acc-700: #0f766e;
  --acc-800: #115e59;
}
[data-accent="violet"] {
  --acc-400: #c084fc;
  --acc-500: #a855f7;
  --acc-600: #9333ea;
  --acc-700: #7e22ce;
  --acc-800: #6b21a8;
}
[data-accent="rose"] {
  --acc-400: #fb7185;
  --acc-500: #f43f5e;
  --acc-600: #e11d48;
  --acc-700: #be123c;
  --acc-800: #9f1239;
}
[data-accent="amber"] {
  --acc-400: #fbbf24;
  --acc-500: #d97706;
  --acc-600: #b45309;
  --acc-700: #92400e;
  --acc-800: #78350f;
}
[data-accent="graphite"] {
  --acc-400: #94a3b8;
  --acc-500: #64748b;
  --acc-600: #475569;
  --acc-700: #334155;
  --acc-800: #1e293b;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
  color-scheme: light;
}

body {
  position: relative;
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-700);
  background:
    radial-gradient(1200px 600px at 50% -8%, color-mix(in srgb, var(--acc-400) 7%, #fff) 0%, transparent 60%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 极淡的胶片颗粒，提升整体质感（置于内容之下，不影响可读性） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1, h2, h3, h4, h5 {
  margin: 0;
  color: var(--ink-900);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.22;
}

p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
input { font: inherit; }
svg { display: block; }
img { max-width: 100%; display: block; }

[hidden] { display: none !important; }

::selection { background: var(--sky-200); color: var(--ink-900); }

:focus-visible {
  outline: 2px solid var(--sky-500);
  outline-offset: 3px;
  border-radius: 6px;
}

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.ico {
  width: 1.15em;
  height: 1.15em;
  fill: currentColor;
  flex: none;
  vertical-align: -0.16em;
}
.ico-sm { width: 0.95em; height: 0.95em; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}
.container--wide { max-width: var(--container-wide); }

/* ---------- reveal animation ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.8s var(--ease) var(--d, 0s),
    transform 0.8s var(--ease) var(--d, 0s);
  will-change: opacity, transform;
}
.js .reveal.is-in { opacity: 1; transform: none; }

/* =========================================================
   NAV
   ========================================================= */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--acc-400) 4%, rgba(255, 255, 255, 0.7));
  backdrop-filter: blur(18px) saturate(1.6);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  border-bottom: 1px solid transparent;
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.nav::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--acc-400) 50%, transparent), transparent);
  opacity: 0;
  transition: opacity 0.35s ease;
}
.nav.is-scrolled {
  background: color-mix(in srgb, var(--acc-400) 3%, rgba(255, 255, 255, 0.93));
  border-bottom-color: var(--line-soft);
  box-shadow: 0 10px 34px -22px color-mix(in srgb, var(--acc-800) 55%, transparent);
}
.nav.is-scrolled::after { opacity: 1; }

.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
}
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  box-shadow: 0 6px 16px -6px color-mix(in srgb, var(--acc-600) 55%, transparent);
  transition: transform 0.4s var(--ease);
}
.brand-mark svg { width: 100%; height: 100%; border-radius: inherit; }
.brand:hover .brand-mark { transform: rotate(-6deg) scale(1.04); }

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.015em;
}
.brand-text em {
  font-style: normal;
  font-size: 0.615rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-400);
  font-weight: 600;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  position: relative;
  padding: 8px 14px;
  border-radius: 99px;
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--ink-600);
  transition: color 0.25s, background 0.25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--sky-500);
  transform: translateX(-50%);
  transition: width 0.3s var(--ease);
  opacity: 0;
}
.nav-links a:hover { color: var(--ink-900); background: color-mix(in srgb, var(--acc-500) 7%, transparent); }
.nav-links a.is-current { color: var(--sky-700); background: color-mix(in srgb, var(--acc-500) 9%, transparent); }
.nav-links a:hover::after { width: 14px; opacity: 1; }

.nav-actions { position: relative; display: flex; align-items: center; gap: 9px; }

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 15px;
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(180deg, var(--sky-500), var(--acc-600));
  box-shadow: 0 6px 16px -8px color-mix(in srgb, var(--acc-600) 90%, transparent);
  transition: transform 0.25s var(--ease), box-shadow 0.25s, filter 0.25s;
}
.nav-btn:hover {
  transform: translateY(-1px);
  filter: saturate(1.1);
  box-shadow: 0 10px 22px -10px color-mix(in srgb, var(--acc-600) 95%, transparent);
}
.nav-btn-ghost {
  color: var(--ink-700);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-xs);
}
.nav-btn-ghost:hover { color: var(--sky-700); border-color: var(--sky-300); }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-700);
  font-size: 1.1rem;
}

/* 主题切换 */
.theme-toggle {
  flex: none;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 99px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-600);
  box-shadow: var(--shadow-xs);
  transition: color 0.25s, background 0.25s, border-color 0.25s, transform 0.25s var(--ease);
}
.theme-toggle:hover {
  color: var(--sky-700);
  border-color: var(--sky-300);
  transform: translateY(-1px);
}
.theme-toggle:active { transform: scale(0.94); }
.theme-toggle .ico { width: 18px; height: 18px; }
.theme-toggle .ico-sun { display: none; }
[data-theme="dark"] .theme-toggle .ico-moon { display: none; }
[data-theme="dark"] .theme-toggle .ico-sun { display: block; }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 72px) 0 84px;
  overflow: hidden;
  background:
    radial-gradient(1200px 560px at 50% -14%, color-mix(in srgb, var(--acc-400) 21%, #fff) 0%, transparent 60%),
    radial-gradient(820px 460px at 90% 4%, color-mix(in srgb, var(--acc-400) 12%, #fff) 0%, transparent 60%),
    radial-gradient(760px 440px at 2% 20%, color-mix(in srgb, var(--acc-400) 8%, #fff) 0%, transparent 62%),
    radial-gradient(900px 560px at 50% 122%, color-mix(in srgb, var(--acc-400) 13%, #fff) 0%, transparent 60%),
    linear-gradient(180deg, color-mix(in srgb, var(--acc-400) 9%, #fff) 0%, color-mix(in srgb, var(--acc-400) 4%, #fff) 54%, #ffffff 100%);
}

.hero-grid {
  position: absolute;
  inset: -10% -10% 0;
  background-image:
    linear-gradient(color-mix(in srgb, var(--acc-700) 5.5%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--acc-700) 5.5%, transparent) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(ellipse 66% 58% at 50% 26%, #000 12%, transparent 74%);
  mask-image: radial-gradient(ellipse 66% 58% at 50% 26%, #000 12%, transparent 74%);
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  pointer-events: none;
  opacity: 0.6;
}
.hero-glow-a {
  width: 440px; height: 440px;
  left: -130px; top: 150px;
  background: radial-gradient(circle, color-mix(in srgb, var(--acc-400) 48%, #fff) 0%, transparent 70%);
  animation: drift 18s ease-in-out infinite;
}
.hero-glow-b {
  width: 480px; height: 480px;
  right: -150px; top: 50px;
  background: radial-gradient(circle, color-mix(in srgb, var(--acc-400) 30%, #fff) 0%, transparent 70%);
  animation: drift 22s ease-in-out infinite reverse;
}
.hero-glow-c {
  width: 560px; height: 560px;
  left: 50%; top: 30%;
  transform: translateX(-50%);
  background: radial-gradient(circle, color-mix(in srgb, var(--acc-400) 32%, transparent) 0%, color-mix(in srgb, var(--acc-400) 0%, transparent) 66%);
  animation: drift 26s ease-in-out infinite;
}
@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(26px, -22px) scale(1.08); }
}

/* ---------- hero slider ---------- */
.hero-shell { position: relative; z-index: 2; }

.hero-slider {
  position: relative;
  overflow: hidden;
  min-height: 300px;
  transition: height 0.6s var(--ease);
  touch-action: pan-y;
}
.hero-track {
  display: flex;
  align-items: stretch;
  will-change: transform;
  transition: transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}
.hero-track.is-dragging { transition: none; }

.slide {
  flex: 0 0 100%;
  width: 100%;
  min-width: 0;
  display: flex;
  align-items: center;
  padding: 10px 0 26px;
}
.slide-brand {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

/* ---------- per-slide accent ---------- */
.slide--indigo {
  --acc-grad: linear-gradient(96deg, #3b4bd8 0%, #5b6cf2 44%, #2f3bb0 100%);
  --acc-ink: #3a46b8;
  --acc-bar: linear-gradient(90deg, #8b96fa, #4453d8);
  --acc-ico: #5464e8;
}
.slide--teal {
  --acc-grad: linear-gradient(96deg, #0a7f70 0%, #12a893 44%, #075e56 100%);
  --acc-ink: #0a7268;
  --acc-bar: linear-gradient(90deg, #4fd6c0, #0d8f7d);
  --acc-ico: #12a08c;
}
.slide--amber {
  --acc-grad: linear-gradient(96deg, #b86c10 0%, #dd9a26 46%, #9a5606 100%);
  --acc-ink: #96600e;
  --acc-bar: linear-gradient(90deg, #f6c56a, #d08a1e);
  --acc-ico: #d68a1c;
}
.slide--rose {
  --acc-grad: linear-gradient(96deg, #c23a72 0%, #e05b8f 44%, #992a5b 100%);
  --acc-ink: #a83568;
  --acc-bar: linear-gradient(90deg, #f58cb2, #cf4b82);
  --acc-ico: #d9558a;
}

.slide-split {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(28px, 4.6vw, 60px);
  align-items: center;
  width: 100%;
  /* 文案与画面各让出一点呼吸位，避免贴着容器边缘 */
  padding-inline: clamp(0px, 2.2vw, 26px);
}

.slide-copy { max-width: 520px; }

.slide-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.695rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--acc-ink, var(--sky-700));
}
.slide-kicker i {
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--acc-bar, linear-gradient(90deg, var(--sky-400), var(--acc-600)));
}

.slide-title {
  margin-top: 14px;
  font-size: clamp(1.8rem, 3.5vw, 2.62rem);
  line-height: 1.16;
  letter-spacing: -0.032em;
  color: var(--ink-900);
}

.slide-desc {
  margin-top: 16px;
  font-size: 0.935rem;
  line-height: 1.88;
  color: var(--ink-500);
}

.slide-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.slide-points li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 0.855rem;
  line-height: 1.6;
  color: var(--ink-600);
}
.slide-points .ico {
  width: 1.05em;
  height: 1.05em;
  color: var(--acc-ico, var(--sky-500));
  margin-top: 0.24em;
}

.slide-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 26px;
}
.slide-meta {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.795rem;
  font-weight: 500;
  color: var(--ink-400);
}
.slide-meta .ico { width: 0.95em; height: 0.95em; color: #e0a02a; }

.slide-visual { position: relative; }

/* 幻灯片里的次级按钮（如「查看演示」）图标跟随该屏主题色 */
.slide .btn-ghost .ico { color: var(--acc-ico, var(--sky-600)); }

/* ---------- 版本切换下拉 ---------- */
.version-drop { position: relative; }

.version-toggle { color: var(--ink-700); font-weight: 600; }
.version-toggle .ico-caret { color: var(--ink-400); }

.version-drop .ico-caret {
  width: 0.9em;
  height: 0.9em;
  opacity: 0.75;
  transition: transform 0.28s var(--ease), opacity 0.28s, color 0.28s;
}
.version-drop.is-open .version-toggle {
  color: var(--sky-700);
  border-color: var(--sky-300);
}
.version-drop.is-open .ico-caret { transform: rotate(180deg); opacity: 1; color: var(--sky-600); }
/* 右侧展开时箭头朝右，指向菜单 */
.version-drop.is-open[data-placement="right"] .ico-caret { transform: rotate(-90deg); }

/* 浮层本身挂在 body 上，用 fixed 定位，避免被 .hero-slider 的 overflow: hidden 裁掉 */
.version-menu {
  position: fixed;
  z-index: 90;
  width: 278px;
  padding: 8px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.97);
  border: 1px solid color-mix(in srgb, var(--acc-700) 13%, transparent);
  box-shadow:
    0 32px 64px -26px color-mix(in srgb, var(--acc-800) 50%, transparent),
    0 2px 8px color-mix(in srgb, var(--acc-800) 7%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  transform-origin: top left;
  transition: opacity 0.16s ease, transform 0.22s var(--ease);
  max-height: calc(100vh - 24px);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.version-menu--demo { width: 316px; }
.version-menu.is-open { opacity: 1; transform: none; }
.version-menu.is-up { transform-origin: bottom left; transform: translateY(6px) scale(0.98); }
.version-menu.is-up.is-open { transform: none; }
/* 从按钮右侧展开（首屏「在线演示」） */
.version-menu.is-right { transform-origin: left center; transform: translateX(-8px) scale(0.98); }
.version-menu.is-right.is-open { transform: none; }

.vm-head {
  display: flex;
  align-items: center;
  padding: 7px 10px 8px;
  font-size: 0.655rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-400);
}
.vm-count {
  margin-left: 7px;
  padding: 1px 7px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--acc-500) 13%, transparent);
  color: var(--sky-700);
  font-size: 0.62rem;
  letter-spacing: 0;
}

/* 分组标题：颜色 = 后端语言，与条目徽标一致 */
.vm-group {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 4px;
  padding: 9px 10px 4px;
  font-size: 0.655rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  color: var(--ink-400);
}
.vm-group:first-of-type { margin-top: 0; }
.vm-dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
}
.vm-dot.php { background: #5b6cf2; }
.vm-dot.ts  { background: #2b8fd8; }
.vm-dot.py  { background: #d99a1e; }
.vm-dot.go  { background: #0a90b4; }

.version-menu a {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 9px 10px;
  border-radius: 11px;
  color: var(--ink-800);
  transition: background 0.18s;
}
.version-menu a + a { margin-top: 2px; }
.version-menu a:hover,
.version-menu a:focus-visible {
  background: linear-gradient(90deg, color-mix(in srgb, var(--acc-400) 13%, transparent), color-mix(in srgb, var(--acc-400) 2%, transparent));
}

.vm-badge {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  flex: none;
  border-radius: 9px;
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff;
  box-shadow: 0 6px 14px -8px color-mix(in srgb, var(--acc-800) 80%, transparent);
}
.vm-badge.php { background: linear-gradient(135deg, #7b8ff5, #4c5fd7); }
.vm-badge.ts  { background: linear-gradient(135deg, #4aa8f0, #1f6fd0); }
.vm-badge.py  { background: linear-gradient(135deg, #ffd166, #e6a020); color: #4a3200; }
.vm-badge.go  { background: linear-gradient(135deg, #5fd3e8, #0891b2); }

.vm-text { display: flex; flex-direction: column; gap: 2px; line-height: 1.3; min-width: 0; }
.vm-text strong {
  font-size: 0.815rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--ink-900);
}
.vm-text em { font-style: normal; font-size: 0.7rem; color: var(--ink-400); }

.version-menu a .ico {
  width: 0.85em;
  height: 0.85em;
  margin-left: auto;
  flex: none;
  color: var(--sky-600);
  opacity: 0;
  transform: translate(-3px, 3px);
  transition: opacity 0.18s, transform 0.18s;
}
.version-menu a:hover .ico,
.version-menu a:focus-visible .ico { opacity: 1; transform: none; }


/* slider controls */
.slider-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 22px;
}

.slider-nav {
  position: relative;
  z-index: 2;
  flex: none;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--ink-500);
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--line);
  box-shadow: 0 8px 20px -14px color-mix(in srgb, var(--acc-800) 50%, transparent);
  backdrop-filter: blur(8px);
  transition: all 0.28s var(--ease);
}
.slider-nav:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--sky-400), var(--acc-600));
  border-color: transparent;
  box-shadow: 0 12px 26px -12px color-mix(in srgb, var(--acc-600) 65%, transparent);
}
.slider-nav:active { transform: scale(0.94); }
.slider-nav .ico { width: 1.05em; height: 1.05em; }

.slider-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}
.slider-dot {
  width: 8px;
  height: 8px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--acc-700) 16%, transparent);
  transition: all 0.45s var(--ease);
}
.slider-dot:hover { background: color-mix(in srgb, var(--acc-500) 42%, transparent); }
.slider-dot.is-active {
  width: 30px;
  background: linear-gradient(90deg, var(--acc-400), var(--acc-600));
  box-shadow: 0 3px 12px -3px color-mix(in srgb, var(--acc-600) 65%, transparent);
}

.slider-hint {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 0.715rem;
  color: var(--ink-400);
}
.slider-hint .ico { width: 1em; height: 1em; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 36px;
  padding: 0 15px 0 13px;
  border-radius: 99px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.7)) padding-box,
    linear-gradient(120deg, color-mix(in srgb, var(--acc-400) 55%, transparent), color-mix(in srgb, var(--acc-400) 12%, transparent)) border-box;
  border: 1px solid transparent;
  box-shadow: 0 6px 18px -8px color-mix(in srgb, var(--acc-700) 45%, transparent), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--sky-700);
  backdrop-filter: blur(8px);
  transition: border-color 0.3s, transform 0.3s var(--ease), box-shadow 0.3s;
}
.pill:hover {
  transform: translateY(-1px);
  border-color: var(--sky-400);
  box-shadow: 0 8px 22px -10px color-mix(in srgb, var(--acc-700) 55%, transparent);
}
.js .pill.reveal.is-in:hover { transform: translateY(-1px); }
.pill-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #2fc48a;
  box-shadow: 0 0 0 4px rgba(47, 196, 138, 0.16);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(47, 196, 138, 0.14); }
  50%      { box-shadow: 0 0 0 7px rgba(47, 196, 138, 0.04); }
}

.hero-title {
  margin-top: 26px;
  font-size: clamp(2.5rem, 5.8vw, 4.35rem);
  line-height: 1.12;
  letter-spacing: -0.038em;
  font-weight: 800;
  color: var(--ink-900);
  text-wrap: balance;
}
.hero-title .grad,
.slide-title .grad {
  background: var(--acc-grad, var(--grad-brand));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  position: relative;
  display: inline-block;
  padding-bottom: 0.06em;
}

.hero-lede {
  max-width: 680px;
  margin-top: 22px;
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  line-height: 1.88;
  color: var(--ink-500);
  text-wrap: pretty;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 48px;
  padding: 0 24px;
  border-radius: 13px;
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.005em;
  white-space: nowrap;
  transition: transform 0.28s var(--ease), box-shadow 0.28s, background 0.28s, border-color 0.28s, color 0.28s;
}
.btn .ico { width: 1.05em; height: 1.05em; }

.btn-primary {
  color: #fff;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0) 46%),
    linear-gradient(135deg, var(--acc-400) 0%, var(--acc-600) 55%, var(--acc-700) 100%);
  box-shadow:
    0 12px 28px -10px color-mix(in srgb, var(--acc-600) 78%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 20px 38px -14px color-mix(in srgb, var(--acc-600) 90%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.32);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 8px 20px -10px color-mix(in srgb, var(--acc-600) 70%, transparent); }

.btn-ghost {
  color: var(--ink-800);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  color: var(--sky-700);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.8)) padding-box,
    linear-gradient(120deg, color-mix(in srgb, var(--acc-400) 55%, transparent), color-mix(in srgb, var(--acc-400) 12%, transparent)) border-box;
  border-color: transparent;
  box-shadow: 0 14px 30px -14px color-mix(in srgb, var(--acc-700) 55%, transparent);
}

/* 深色按钮（首屏「在线演示」） */
.btn-dark {
  color: #e6f4ff;
  background: linear-gradient(158deg, #1c2c3b 0%, #0e1c27 58%, #0a151e 100%);
  border: 1px solid rgba(24, 52, 74, 0.92);
  box-shadow:
    0 16px 34px -18px rgba(6, 26, 40, 0.75),
    inset 0 1px 0 rgba(255, 255, 255, 0.09);
}
.btn-dark:hover {
  transform: translateY(-2px);
  color: #fff;
  border-color: color-mix(in srgb, var(--acc-400) 42%, transparent);
  box-shadow:
    0 22px 40px -16px rgba(6, 26, 40, 0.8),
    0 0 0 4px color-mix(in srgb, var(--acc-400) 10%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
}
.btn-dark .ico { color: color-mix(in srgb, var(--acc-400) 80%, #fff); }
.btn-dark .ico-caret { color: rgba(163, 216, 245, 0.85); }

.btn-sm { height: 40px; padding: 0 18px; font-size: 0.88rem; border-radius: 10px; }

/* hero stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3.2vw, 40px);
  margin-top: 48px;
  padding: 20px 34px;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.55)) padding-box,
    linear-gradient(120deg, color-mix(in srgb, var(--acc-400) 40%, transparent), color-mix(in srgb, var(--acc-400) 5%, transparent)) border-box;
  border: 1px solid transparent;
  box-shadow: 0 22px 52px -28px color-mix(in srgb, var(--acc-800) 72%, transparent), inset 0 1px 0 rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(14px);
}
.stat { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.stat-num {
  font-size: clamp(1.3rem, 2.1vw, 1.68rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink-900);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.stat-label { font-size: 0.755rem; color: var(--ink-400); font-weight: 500; letter-spacing: 0.02em; }
.stat-sep { width: 1px; height: 28px; background: var(--line); }

/* terminal */
.terminal {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(170deg, #0d2a3d 0%, #0a2131 100%);
  border: 1px solid color-mix(in srgb, var(--acc-400) 18%, transparent);
  box-shadow:
    0 40px 80px -34px rgba(6, 55, 85, 0.6),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset,
    0 1px 0 rgba(255, 255, 255, 0.1) inset;
  text-align: left;
}
.terminal::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 180px at 50% -10%, color-mix(in srgb, var(--acc-400) 20%, transparent), transparent 70%);
  pointer-events: none;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 42px;
  padding: 0 14px;
  background: rgba(255, 255, 255, 0.045);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.dots { display: inline-flex; gap: 6px; }
.dots i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, 0.2); }
.dots i:nth-child(1) { background: #ff6b6b; opacity: 0.85; }
.dots i:nth-child(2) { background: #ffd166; opacity: 0.85; }
.dots i:nth-child(3) { background: #4ad991; opacity: 0.85; }
.terminal-title {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: rgba(190, 224, 245, 0.55);
  letter-spacing: 0.02em;
}
.terminal-badge {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.64rem;
  color: color-mix(in srgb, var(--acc-400) 80%, #fff);
  background: color-mix(in srgb, var(--acc-400) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--acc-400) 25%, transparent);
  padding: 2px 8px;
  border-radius: 99px;
}
.terminal-body { padding: 20px 22px 24px; }
.terminal-body pre {
  margin: 0;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.795rem;
  line-height: 2.02;
  color: #c6dced;
  scrollbar-width: thin;
}
.terminal-body code { font-family: inherit; }
.t-comment { color: #5f7d94; }
.t-prompt { color: color-mix(in srgb, var(--acc-400) 82%, #fff); font-weight: 600; }
.t-ok { color: #4ad991; }
.t-dim { color: #6d879b; }
.t-link { color: color-mix(in srgb, var(--acc-400) 80%, #fff); text-decoration: underline; text-decoration-color: rgba(127, 212, 255, 0.35); text-underline-offset: 3px; }
.t-caret {
  display: inline-block;
  width: 7px;
  height: 14px;
  margin-left: 2px;
  background: color-mix(in srgb, var(--acc-400) 82%, #fff);
  vertical-align: -2px;
  animation: blink 1.15s step-end infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* =========================================================
   SLIDE MOCKS
   ========================================================= */
.mock { position: relative; border-radius: 18px; }

/* --- dashboard UI --- */
.mock-admin {
  display: flex;
  height: 328px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow:
    0 30px 60px -34px color-mix(in srgb, var(--acc-800) 55%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
  transform: perspective(1400px) rotateY(-5deg) rotateX(1.6deg);
  transition: transform 0.7s var(--ease);
}
.slide:hover .mock-admin { transform: perspective(1400px) rotateY(-1deg) rotateX(0deg); }

.ma-side {
  width: 56px;
  flex: none;
  padding: 13px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--acc-400) 5%, #fff), color-mix(in srgb, var(--acc-400) 11%, #fff));
  border-right: 1px solid var(--line-soft);
}
.ma-logo {
  width: 22px;
  height: 22px;
  border-radius: 7px;
  margin-bottom: 5px;
  background: linear-gradient(135deg, var(--acc-400), var(--acc-800));
  box-shadow: 0 4px 10px -4px color-mix(in srgb, var(--acc-600) 75%, transparent);
}
.ma-nav { width: 30px; height: 26px; border-radius: 7px; background: color-mix(in srgb, var(--acc-700) 6%, transparent); }
.ma-nav.on {
  background: linear-gradient(135deg, color-mix(in srgb, var(--acc-400) 95%, transparent), color-mix(in srgb, var(--acc-600) 95%, transparent));
  box-shadow: 0 6px 14px -6px color-mix(in srgb, var(--acc-600) 80%, transparent);
}

.ma-main {
  flex: 1;
  min-width: 0;
  padding: 14px 15px;
  display: flex;
  flex-direction: column;
  gap: 11px;
  background: color-mix(in srgb, var(--acc-400) 3%, #fff);
}
.ma-top { display: flex; align-items: center; gap: 8px; }
.ma-search { flex: 1; height: 18px; border-radius: 99px; background: color-mix(in srgb, var(--acc-400) 10%, #fff); }
.ma-dots { display: flex; gap: 4px; flex: none; }
.ma-dots i { width: 5px; height: 5px; border-radius: 50%; background: color-mix(in srgb, var(--acc-400) 22%, #fff); }
.ma-avatar {
  width: 22px; height: 22px;
  flex: none;
  border-radius: 50%;
  background: linear-gradient(135deg, color-mix(in srgb, var(--acc-400) 55%, #fff), var(--acc-500));
}

.ma-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.ma-card {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 8px 9px;
  border-radius: 9px;
  background: #fff;
  border: 1px solid var(--line-soft);
}
.ma-card small { font-size: 0.555rem; color: var(--ink-400); }
.ma-card b { font-size: 0.82rem; line-height: 1.35; letter-spacing: -0.02em; color: var(--ink-900); }
.ma-card em { font-style: normal; font-size: 0.53rem; font-weight: 600; color: #12a06a; }

.ma-chart {
  flex: 1;
  min-height: 0;
  padding: 9px 10px 8px;
  display: flex;
  align-items: flex-end;
  gap: 5px;
  border-radius: 9px;
  background: #fff;
  border: 1px solid var(--line-soft);
}
.ma-chart i {
  flex: 1;
  height: var(--h, 50%);
  border-radius: 3px 3px 2px 2px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--acc-400) 65%, #fff), var(--acc-500));
  opacity: 0.9;
}
.ma-chart i:nth-child(3n) { background: linear-gradient(180deg, color-mix(in srgb, var(--acc-400) 40%, #fff), var(--acc-400)); }

.ma-rows { display: grid; gap: 5px; }
.ma-rows i {
  display: block;
  width: var(--w, 70%);
  height: 7px;
  border-radius: 99px;
  background: linear-gradient(90deg, color-mix(in srgb, var(--acc-400) 9%, #fff), color-mix(in srgb, var(--acc-400) 5%, #fff));
}

.mock-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--line);
  box-shadow: 0 16px 34px -18px color-mix(in srgb, var(--acc-800) 50%, transparent);
  backdrop-filter: blur(8px);
  animation: floaty 6s ease-in-out infinite;
}
.mock-badge .ico { width: 18px; height: 18px; color: var(--sky-500); }
.mock-badge div { display: flex; flex-direction: column; line-height: 1.15; }
.mock-badge strong { font-size: 0.78rem; color: var(--ink-900); letter-spacing: -0.01em; }
.mock-badge span { font-size: 0.6rem; color: var(--ink-400); }
.mock-badge-a { left: -18px; bottom: -16px; }
.mock-badge-b { right: -14px; bottom: -18px; animation-delay: -2.5s; }

/* --- terminal slide --- */
.mock-terminal { box-shadow: 0 34px 66px -36px rgba(6, 55, 85, 0.68); }
.mock-terminal .terminal-body { padding: 18px 20px 20px; }
.mock-terminal .terminal-body pre { font-size: 0.735rem; line-height: 1.95; }

/* --- monitor --- */
.mock-monitor {
  padding: 15px 16px 12px;
  overflow: hidden;
  color: #c6dced;
  background: linear-gradient(165deg, #0d2a3d 0%, #081d2b 100%);
  border: 1px solid color-mix(in srgb, var(--acc-400) 16%, transparent);
  box-shadow:
    0 34px 66px -36px rgba(6, 55, 85, 0.7),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.mock-monitor::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 150px at 50% -8%, color-mix(in srgb, var(--acc-400) 20%, transparent), transparent 70%);
  pointer-events: none;
}
.mm-head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.635rem;
  letter-spacing: 0.04em;
  color: rgba(190, 224, 245, 0.55);
}
.mm-head b {
  margin-left: auto;
  font-size: 0.56rem;
  letter-spacing: 0.1em;
  color: #4ad991;
  background: rgba(74, 217, 145, 0.12);
  border: 1px solid rgba(74, 217, 145, 0.25);
  padding: 2px 7px;
  border-radius: 99px;
}
.mm-metrics {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 14px 0 12px;
}
.mm-metrics div {
  padding: 8px 10px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
}
.mm-metrics small {
  display: block;
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  color: rgba(190, 224, 245, 0.45);
}
.mm-metrics b {
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: color-mix(in srgb, var(--acc-400) 13%, #fff);
}
.mm-metrics b span { font-size: 0.6rem; margin-left: 1px; color: rgba(190, 224, 245, 0.5); }
.mm-chart { position: relative; z-index: 1; height: 108px; }
.mm-chart svg { width: 100%; height: 100%; }
.mm-foot {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
.mm-foot span {
  font-family: var(--mono);
  font-size: 0.545rem;
  color: rgba(190, 224, 245, 0.55);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 2px 7px;
  border-radius: 5px;
}

/* --- p2p topology --- */
.mock-p2p {
  padding: 8px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 30px 60px -34px color-mix(in srgb, var(--acc-800) 50%, transparent);
}
.mock-p2p svg { width: 100%; height: auto; }
.p2p-links path {
  stroke: color-mix(in srgb, var(--acc-500) 35%, transparent);
  stroke-width: 1.6;
  stroke-dasharray: 5 6;
  animation: dashflow 3s linear infinite;
}
@keyframes dashflow { to { stroke-dashoffset: -22; } }
.pn { fill: #fff; stroke: color-mix(in srgb, var(--acc-500) 34%, transparent); stroke-width: 1.6; }
.pc { fill: url(#p2pCore); filter: drop-shadow(0 8px 18px color-mix(in srgb, var(--acc-600) 35%, transparent)); }
.pc-text {
  fill: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-anchor: middle;
  font-family: var(--font);
}
.pn-text {
  fill: #5b7893;
  font-size: 12px;
  font-weight: 600;
  text-anchor: middle;
  font-family: var(--mono);
}
.p2p-chip {
  position: absolute;
  padding: 4px 10px;
  border-radius: 99px;
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--sky-700);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  box-shadow: 0 10px 24px -14px color-mix(in srgb, var(--acc-800) 50%, transparent);
}
.p2p-chip-a { top: 14%; left: 1%; }
.p2p-chip-b { right: 1%; bottom: 10%; }

/* floating badge (slide mocks) */
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-9px); }
}

/* =========================================================
   SECTION SHELL
   ========================================================= */
.section { position: relative; padding: 96px 0; }

.section-head {
  max-width: 680px;
  margin: 0 auto 46px;
  text-align: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.715rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--sky-700);
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--acc-500) 9%, transparent);
  border: 1px solid color-mix(in srgb, var(--acc-500) 16%, transparent);
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--acc-400), var(--acc-600));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--acc-400) 18%, transparent);
}
.section-title {
  margin-top: 16px;
  font-size: clamp(1.8rem, 3.3vw, 2.55rem);
  font-weight: 800;
  letter-spacing: -0.032em;
  text-wrap: balance;
}
.section-desc {
  margin-top: 14px;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink-500);
  text-wrap: pretty;
}

/* =========================================================
   PROJECTS
   ========================================================= */
.projects {
  background:
    radial-gradient(900px 500px at 50% 0%, color-mix(in srgb, var(--acc-400) 8%, #fff) 0%, transparent 62%),
    #fff;
  padding-top: 86px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 32px;
}

.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 15px;
  border-radius: 99px;
  font-size: 0.855rem;
  font-weight: 500;
  color: var(--ink-600);
  background: #fff;
  border: 1px solid var(--line);
  transition: all 0.25s var(--ease);
}
.chip em {
  font-style: normal;
  font-size: 0.705rem;
  font-weight: 600;
  color: var(--ink-400);
  background: color-mix(in srgb, var(--acc-700) 6%, transparent);
  padding: 1px 6px;
  border-radius: 99px;
  transition: all 0.25s;
}
.chip:hover { border-color: var(--sky-300); color: var(--sky-700); transform: translateY(-1px); }
.chip.is-active {
  color: #fff;
  background: linear-gradient(135deg, var(--sky-500), var(--acc-600));
  border-color: transparent;
  box-shadow: 0 8px 20px -10px color-mix(in srgb, var(--acc-600) 80%, transparent);
}
.chip.is-active em { color: #fff; background: rgba(255, 255, 255, 0.22); }

.search {
  display: flex;
  align-items: center;
  gap: 9px;
  height: 42px;
  width: 292px;
  padding: 0 14px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-xs);
  color: var(--ink-400);
  transition: border-color 0.25s, box-shadow 0.25s;
}
.search:focus-within {
  border-color: var(--sky-400);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--acc-500) 10%, transparent);
}
.search input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: none;
  font-size: 0.875rem;
  color: var(--ink-800);
}
.search input::placeholder { color: var(--ink-400); }
.search input::-webkit-search-cancel-button { -webkit-appearance: none; }

.search-clear {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  flex: none;
  border-radius: 50%;
  color: var(--ink-400);
  background: color-mix(in srgb, var(--acc-700) 8%, transparent);
  transition: color 0.2s, background 0.2s;
}
.search-clear .ico { width: 0.72em; height: 0.72em; }
.search-clear:hover { color: var(--sky-700); background: color-mix(in srgb, var(--acc-500) 16%, transparent); }

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 24px 24px 20px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line-soft);
  box-shadow: 0 1px 2px color-mix(in srgb, var(--acc-800) 3%, transparent), 0 20px 44px -32px color-mix(in srgb, var(--acc-800) 60%, transparent);
  overflow: hidden;
  transition:
    transform 0.45s var(--ease),
    box-shadow 0.45s var(--ease),
    border-color 0.35s;
}
.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(140deg, color-mix(in srgb, var(--acc-400) 70%, transparent), color-mix(in srgb, var(--acc-400) 0%, transparent) 50%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.project-card::after {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  right: -100px;
  top: -120px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--acc-400) 18%, transparent), transparent 68%);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}
.project-card:hover {
  transform: translateY(-6px);
  border-color: color-mix(in srgb, var(--acc-500) 22%, transparent);
  box-shadow: var(--shadow-lg), 0 0 0 1px color-mix(in srgb, var(--acc-400) 8%, transparent);
}
.project-card:hover::before,
.project-card:hover::after { opacity: 1; }

.pc-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}
.pc-icon {
  width: 46px;
  height: 46px;
  flex: none;
  border-radius: 13px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(140deg, var(--c1, var(--acc-400)), var(--c2, var(--acc-600)));
  box-shadow:
    0 8px 18px -8px color-mix(in srgb, var(--c2, var(--acc-600)) 75%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transition: transform 0.4s var(--ease);
}
.pc-icon .ico { width: 22px; height: 22px; }
.project-card:hover .pc-icon { transform: translateY(-2px) scale(1.04); }

.pc-title { flex: 1; min-width: 0; }
.pc-title h3 {
  font-size: 1.045rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.pc-name { overflow-wrap: anywhere; }
.pc-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 5px;
  font-size: 0.755rem;
  color: var(--ink-400);
  font-weight: 500;
}
.lang { display: inline-flex; align-items: center; gap: 5px; }
.lang i {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--lc, var(--sky-500));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--lc, var(--sky-500)) 16%, transparent);
}
.pc-meta .m-dot { width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: 0.4; }
.pc-star { display: inline-flex; align-items: center; gap: 4px; color: #e0a02a; }
.pc-star .ico { width: 0.92em; height: 0.92em; }

.pc-flag {
  flex: none;
  align-self: flex-start;
  font-size: 0.655rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--sky-700);
  background: linear-gradient(180deg, color-mix(in srgb, var(--acc-400) 13%, #fff), color-mix(in srgb, var(--acc-400) 19%, #fff));
  border: 1px solid color-mix(in srgb, var(--acc-500) 20%, transparent);
  padding: 3px 9px;
  border-radius: 7px;
}

.pc-desc {
  font-size: 0.885rem;
  line-height: 1.82;
  color: var(--ink-500);
  flex: 1;
}

.pc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 16px 0 0;
}
.pc-tags span {
  font-size: 0.705rem;
  font-weight: 500;
  color: var(--ink-600);
  background: color-mix(in srgb, var(--acc-400) 5%, #fff);
  border: 1px solid color-mix(in srgb, var(--acc-700) 7%, transparent);
  padding: 3px 9px;
  border-radius: 6px;
  letter-spacing: 0.005em;
}

.pc-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding-top: 15px;
  border-top: 1px solid var(--line-soft);
}
.pc-links { display: flex; align-items: center; gap: 8px; }
.pc-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 11px;
  border-radius: 8px;
  font-size: 0.775rem;
  font-weight: 600;
  color: var(--ink-600);
  background: color-mix(in srgb, var(--acc-400) 5%, #fff);
  border: 1px solid transparent;
  transition: all 0.25s;
}
.pc-link:hover {
  color: var(--sky-700);
  background: color-mix(in srgb, var(--acc-400) 11%, #fff);
  border-color: color-mix(in srgb, var(--acc-500) 22%, transparent);
}
.pc-link .ico { width: 0.98em; height: 0.98em; }
.pc-arrow {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: var(--ink-400);
  background: color-mix(in srgb, var(--acc-400) 5%, #fff);
  transition: all 0.3s var(--ease);
}
.project-card:hover .pc-arrow {
  color: #fff;
  background: linear-gradient(135deg, var(--sky-400), var(--acc-600));
  transform: rotate(45deg);
}

/* ---------- 分页 ---------- */
.pager {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 13px;
  margin-top: 40px;
}
.pager[hidden] { display: none; }

.pager-main {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.pager-pages {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pager-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  min-width: 40px;
  padding: 0 11px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-600);
  font-size: 0.86rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  box-shadow: var(--shadow-xs);
  transition:
    color 0.22s,
    background 0.28s,
    border-color 0.22s,
    transform 0.3s var(--ease),
    box-shadow 0.3s;
}
.pager-btn .ico { width: 1em; height: 1em; }
.pager-btn:not(.is-active):hover:not(:disabled) {
  color: var(--sky-700);
  border-color: var(--sky-300);
  transform: translateY(-1px);
  box-shadow: 0 8px 18px -10px color-mix(in srgb, var(--acc-600) 70%, transparent);
}
.pager-btn:active:not(:disabled) { transform: scale(0.95); }
.pager-btn:disabled {
  opacity: 0.42;
  cursor: not-allowed;
  box-shadow: none;
}
.pager-num.is-active {
  color: var(--acc-700);
  border-color: color-mix(in srgb, var(--acc-500) 42%, transparent);
  background: color-mix(in srgb, var(--acc-500) 10%, #fff);
  box-shadow:
    0 6px 16px -10px color-mix(in srgb, var(--acc-600) 70%, transparent),
    inset 0 1px 0 #fff;
}
.pager-num.is-active:hover { transform: none; }

.pager-gap {
  display: grid;
  place-items: center;
  width: 24px;
  height: 40px;
  color: var(--ink-400);
  font-size: 0.86rem;
  letter-spacing: 0.05em;
}

.pager-info {
  margin: 0;
  font-size: 0.775rem;
  line-height: 1.5;
  color: var(--ink-500);
  letter-spacing: 0.005em;
  text-align: center;
}

.projects-foot {
  margin-top: 34px;
  text-align: center;
  font-size: 0.86rem;
  color: var(--ink-400);
}
.projects-foot a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--sky-700);
  font-weight: 600;
  border-bottom: 1px solid color-mix(in srgb, var(--acc-800) 25%, transparent);
  padding-bottom: 1px;
  transition: border-color 0.25s;
}
.projects-foot a:hover { border-color: var(--sky-600); }

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 70px 20px;
  border-radius: var(--radius-lg);
  border: 1px dashed color-mix(in srgb, var(--acc-700) 20%, transparent);
  background: color-mix(in srgb, var(--acc-400) 3%, #fff);
  text-align: center;
  color: var(--ink-400);
  font-size: 0.9rem;
}
.empty-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--sky-50);
  color: var(--sky-400);
  font-size: 1.3rem;
}
.empty-state a { color: var(--sky-700); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }

/* =========================================================
   STACK
   ========================================================= */
.stack {
  background: linear-gradient(180deg, #ffffff 0%, color-mix(in srgb, var(--acc-400) 6%, #fff) 100%);
  overflow: hidden;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.stack-card {
  position: relative;
  padding: 24px 22px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line-soft);
  box-shadow: 0 8px 26px -24px color-mix(in srgb, var(--acc-800) 60%, transparent);
  overflow: hidden;
  transition: transform 0.4s var(--ease), box-shadow 0.4s, border-color 0.3s;
}
.stack-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--sky-500), var(--sky-300));
  opacity: 0;
  transition: opacity 0.35s;
}
.stack-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--acc-500) 20%, transparent);
  box-shadow: 0 26px 48px -30px color-mix(in srgb, var(--acc-800) 55%, transparent);
}
.stack-card:hover::before { opacity: 1; }
.stack-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.stack-lang {
  display: inline-grid;
  place-items: center;
  min-width: 42px;
  height: 30px;
  padding: 0 10px;
  border-radius: 8px;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #fff;
}
.stack-lang.php { background: linear-gradient(135deg, #7b8ff5, #4c5fd7); }
.stack-lang.ts  { background: linear-gradient(135deg, #4aa8f0, #1f6fd0); }
.stack-lang.go  { background: linear-gradient(135deg, #5fd3e8, #0891b2); }
.stack-lang.py  { background: linear-gradient(135deg, #ffd166, #e6a020); color: #4a3200; }
.stack-count { font-size: 0.7rem; color: var(--ink-400); font-weight: 500; }
.stack-card h3 { font-size: 0.945rem; margin-bottom: 8px; letter-spacing: -0.01em; }
.stack-card p { font-size: 0.8rem; line-height: 1.75; color: var(--ink-500); min-height: 4.2em; }
.stack-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 14px; }
.stack-tags span {
  font-size: 0.665rem;
  color: var(--sky-700);
  background: color-mix(in srgb, var(--acc-500) 7%, transparent);
  padding: 2px 7px;
  border-radius: 5px;
  font-weight: 500;
}

/* marquee */
.marquee {
  margin-top: 46px;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex;
  align-items: center;
  gap: 22px;
  width: max-content;
  animation: scrollx 42s linear infinite;
}
.marquee-track span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-400);
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.marquee-track i {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--sky-300);
  flex: none;
}
@keyframes scrollx {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* =========================================================
   ABOUT
   ========================================================= */
.about { background: #fff; }

.about-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 64px;
  align-items: start;
}
.about .section-title { margin-top: 14px; }
.about-text {
  margin-top: 18px;
  font-size: 0.945rem;
  line-height: 1.92;
  color: var(--ink-500);
  max-width: 560px;
}
.about-text strong { color: var(--ink-800); font-weight: 600; }

.about-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 26px;
  margin-top: 36px;
}
.point { display: flex; gap: 12px; align-items: flex-start; }
.point-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 11px;
  color: var(--sky-600);
  background: linear-gradient(180deg, color-mix(in srgb, var(--acc-400) 7%, #fff), color-mix(in srgb, var(--acc-400) 13%, #fff));
  border: 1px solid color-mix(in srgb, var(--acc-500) 14%, transparent);
  font-size: 1.02rem;
}
.point h4 { font-size: 0.9rem; margin-bottom: 3px; }
.point p { font-size: 0.795rem; line-height: 1.7; color: var(--ink-400); }

/* maintainer card */
.about-card {
  position: relative;
  border-radius: var(--radius-xl);
  background: linear-gradient(165deg, #ffffff 0%, color-mix(in srgb, var(--acc-400) 7%, #fff) 100%);
  border: 1px solid color-mix(in srgb, var(--acc-700) 10%, transparent);
  box-shadow: 0 30px 60px -40px color-mix(in srgb, var(--acc-800) 55%, transparent);
  overflow: hidden;
  padding: 28px 26px 22px;
}
.about-card::before {
  content: "";
  position: absolute;
  width: 280px; height: 280px;
  right: -120px; top: -150px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--acc-400) 22%, transparent), transparent 65%);
}
.about-card-top { position: relative; padding-bottom: 20px; border-bottom: 1px dashed var(--line); }
.mini-label {
  font-size: 0.645rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--sky-600);
  text-transform: uppercase;
}
.about-card-top h3 {
  margin-top: 8px;
  font-size: 1.42rem;
  letter-spacing: -0.02em;
  background: linear-gradient(96deg, var(--acc-700), var(--acc-500));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}
.about-card-top p {
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--ink-400);
  font-style: italic;
}

.about-card-list { padding: 6px 0; position: relative; }
.about-card-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 2px;
  font-size: 0.82rem;
  color: var(--ink-600);
  border-bottom: 1px solid var(--line-soft);
  transition: color 0.25s, gap 0.25s;
}
.about-card-list a:last-child { border-bottom: 0; }
.about-card-list a:hover { color: var(--sky-700); }
.about-card-list a .ico:last-child { margin-left: auto; color: var(--ink-400); }
.about-card-list a:hover .ico:last-child { color: var(--sky-600); }

.about-card-foot {
  display: flex;
  align-items: center;
  gap: 7px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 0.72rem;
  color: var(--ink-400);
  font-weight: 500;
}
.dot-live {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #2fc48a;
  box-shadow: 0 0 0 3px rgba(47, 196, 138, 0.15);
}

/* =========================================================
   CONTACT
   ========================================================= */
.contact { padding-top: 20px; padding-bottom: 100px; background: #fff; }

.cta-band {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 56px 60px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(720px 340px at 12% -10%, color-mix(in srgb, var(--acc-400) 42%, transparent), transparent 60%),
    linear-gradient(120deg, var(--acc-800) 0%, var(--acc-600) 46%, var(--acc-400) 100%);
  box-shadow: 0 40px 80px -36px color-mix(in srgb, var(--acc-800) 72%, transparent);
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: -2px;
  z-index: 0;
  background: linear-gradient(115deg, transparent 32%, rgba(255, 255, 255, 0.2) 48%, transparent 64%);
  transform: translateX(-40%);
  animation: ctaSheen 7.5s ease-in-out infinite;
  pointer-events: none;
}
@keyframes ctaSheen {
  0%, 100% { transform: translateX(-45%); }
  50%      { transform: translateX(45%); }
}
.cta-glow {
  position: absolute;
  width: 460px; height: 460px;
  right: -100px; bottom: -260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22), transparent 62%);
  pointer-events: none;
}
.cta-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 70% 100% at 70% 50%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 100% at 70% 50%, #000, transparent 75%);
  pointer-events: none;
}
.cta-copy { position: relative; z-index: 1; max-width: 560px; }
.eyebrow-light {
  color: color-mix(in srgb, var(--acc-400) 90%, #fff);
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.24);
}
.cta-copy h2 {
  margin-top: 14px;
  color: #fff;
  font-size: clamp(1.5rem, 2.6vw, 2.05rem);
  font-weight: 800;
  letter-spacing: -0.028em;
}
.cta-copy p {
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9rem;
  line-height: 1.8;
}
.cta-actions { position: relative; z-index: 1; display: flex; flex-direction: column; gap: 10px; flex: none; }

.btn-light {
  color: var(--acc-800);
  background: #fff;
  box-shadow: 0 12px 26px -14px rgba(0, 40, 70, 0.6);
}
.btn-light:hover { transform: translateY(-2px); background: color-mix(in srgb, var(--acc-400) 7%, #fff); }
.btn-outline-light {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.08);
}
.btn-outline-light:hover { background: rgba(255, 255, 255, 0.16); border-color: rgba(255, 255, 255, 0.55); }

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  position: relative;
  padding: 62px 0 28px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--acc-400) 5%, #fff) 0%, color-mix(in srgb, var(--acc-400) 11%, #fff) 100%);
  border-top: 1px solid var(--line-soft);
}
.footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--acc-400) 50%, transparent), transparent);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand { max-width: 300px; }
.footer-brand p {
  margin-top: 14px;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--ink-400);
}
.footer-cols { display: flex; gap: 64px; }
.footer-col { display: flex; flex-direction: column; gap: 9px; }
.footer-col h5 {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-400);
  margin-bottom: 4px;
}
.footer-col a {
  font-size: 0.845rem;
  color: var(--ink-600);
  transition: color 0.25s, transform 0.25s;
  width: fit-content;
}
.footer-col a:hover { color: var(--sky-700); transform: translateX(2px); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.755rem;
  color: var(--ink-400);
}

/* =========================================================
   TO TOP
   ========================================================= */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  color: var(--ink-600);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.35s var(--ease);
  font-size: 1.1rem;
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--sky-400), var(--acc-600));
  border-color: transparent;
}

/* =========================================================
   HERO SCROLL CUE
   ========================================================= */
.scroll-cue {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 11px;
  width: fit-content;
  margin: 30px auto 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-400);
  font-weight: 600;
}
.scroll-cue .sc-chev {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  color: var(--sky-600);
  box-shadow: var(--shadow-xs);
  animation: scBounce 2.2s ease-in-out infinite;
}
.scroll-cue .sc-chev .ico { width: 16px; height: 16px; }
.scroll-cue:hover .sc-chev { color: var(--sky-700); border-color: var(--sky-300); }
@keyframes scBounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(5px); }
}
@media (min-width: 941px) { .scroll-cue { display: inline-flex; } }

/* =========================================================
   HIGHLIGHTS STRIP
   ========================================================= */
.highlights { padding: 0; }
.highlight-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: -52px;
  position: relative;
  z-index: 4;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  backdrop-filter: blur(12px);
}
.highlight {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 24px 22px;
  border-right: 1px solid var(--line-soft);
}
.highlight:last-child { border-right: 0; }
.highlight-ico {
  width: 46px; height: 46px;
  flex: none;
  border-radius: 14px;
  display: grid; place-items: center;
  color: #fff;
  background: linear-gradient(140deg, var(--sky-400), var(--acc-600));
  box-shadow: 0 8px 18px -8px color-mix(in srgb, var(--acc-600) 70%, transparent);
}
.highlight-ico .ico { width: 22px; height: 22px; }
.highlight-ico.i-teal  { background: linear-gradient(140deg, #19b39d, #0a7268); box-shadow: 0 8px 18px -8px rgba(10, 114, 104, 0.7); }
.highlight-ico.i-amber { background: linear-gradient(140deg, #e8aa35, #9a5606); box-shadow: 0 8px 18px -8px rgba(154, 86, 6, 0.7); }
.highlight-ico.i-rose  { background: linear-gradient(140deg, #e05b8f, #992a5b); box-shadow: 0 8px 18px -8px rgba(153, 42, 91, 0.7); }
.highlight-text h4 { font-size: 0.96rem; letter-spacing: -0.01em; }
.highlight-text p {
  font-size: 0.78rem;
  color: var(--ink-400);
  margin-top: 3px;
  line-height: 1.5;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1080px) {
  .about-inner { gap: 40px; }
  .stack-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .slide-split { gap: 34px; }
  .mock-admin { height: 300px; }

  .highlight-grid { grid-template-columns: repeat(2, 1fr); margin-top: 0; }
  .highlight:nth-child(2n) { border-right: 0; }
  .highlight:nth-child(1),
  .highlight:nth-child(2) { border-bottom: 1px solid var(--line-soft); }
}

/* 超大屏：项目卡片三列排布，更显大气 */
@media (min-width: 1180px) {
  .project-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 940px) {
  :root { --nav-h: 66px; }

  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 20px 22px;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -24px color-mix(in srgb, var(--acc-800) 40%, transparent);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.32s var(--ease);
  }
  .nav-links.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav-links a { padding: 13px 10px; border-radius: 10px; font-size: 0.98rem; }
  .nav-links a::after { display: none; }

  .nav-toggle { display: inline-flex; }
  .nav-btn span { display: none; }
  .nav-btn { width: 40px; padding: 0; justify-content: center; }
  .nav-btn-ghost { display: none; }

  .hero { padding: calc(var(--nav-h) + 48px) 0 62px; }
  .hero-stats { gap: 20px; padding: 16px 22px; flex-wrap: wrap; justify-content: center; }
  .stat-sep { display: none; }

  .slide-split { grid-template-columns: 1fr; gap: 26px; }
  .slide-copy { max-width: none; }
  .slide-visual { width: 100%; }
  .slide-title { font-size: clamp(1.62rem, 4.4vw, 2rem); }
  .slider-controls { margin-top: 18px; gap: 14px; }
  .slider-nav { width: 36px; height: 36px; }
  .slider-hint { display: flex; }
  .mock-admin { height: 268px; transform: none; }
  .slide:hover .mock-admin { transform: none; }
  .mock-badge-a { left: 12px; bottom: -14px; }
  .mock-badge-b { right: 12px; bottom: -14px; }
  .p2p-chip-a { left: 4%; }
  .p2p-chip-b { right: 4%; }

  .toolbar { flex-direction: column; align-items: stretch; gap: 14px; }
  .search { width: 100%; }
  .filters { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; scrollbar-width: none; }
  .filters::-webkit-scrollbar { display: none; }
  .chip { flex: none; }

  .project-grid { grid-template-columns: 1fr; }
  .about-inner { grid-template-columns: 1fr; gap: 36px; }
  .cta-band { flex-direction: column; align-items: flex-start; padding: 38px 32px; gap: 26px; }
  .cta-actions { flex-direction: row; flex-wrap: wrap; width: 100%; }
  .cta-actions .btn { flex: 1; min-width: 180px; }
  .footer-inner { flex-direction: column; gap: 34px; }
  .footer-cols { gap: 48px; flex-wrap: wrap; }
}

@media (max-width: 640px) {
  .container { padding-inline: 18px; }
  .section { padding: 68px 0; }
  .section-head { margin-bottom: 34px; }

  .hero-title { font-size: clamp(2.05rem, 8.6vw, 2.6rem); }
  .hero-lede { font-size: 0.925rem; margin-top: 18px; }
  .hero-cta { width: 100%; flex-direction: column; margin-top: 26px; }
  .hero-cta .btn { width: 100%; }
  .hero-stats { width: 100%; margin-top: 34px; padding: 16px 10px; gap: 10px 18px; }
  .stat-sep { display: none; }
  .stat { flex: 1 0 38%; }
  .stat-label { font-size: 0.7rem; }

  .slide { padding: 0; }
  .slide-split { gap: 22px; padding-inline: 0; }
  .slide-kicker { font-size: 0.65rem; }
  .slide-title { font-size: 1.6rem; margin-top: 10px; }
  .slide-desc { margin-top: 12px; font-size: 0.875rem; line-height: 1.82; }
  .slide-points { margin-top: 16px; gap: 8px; }
  .slide-points li { font-size: 0.805rem; }
  .slide-actions { margin-top: 20px; gap: 12px; }
  .mock-admin { height: 228px; }
  .ma-side { width: 44px; }
  .ma-nav { width: 24px; height: 22px; }
  .ma-main { padding: 11px 11px; gap: 8px; }
  .ma-cards { gap: 5px; }
  .ma-card { padding: 6px 7px; }
  .ma-card small { font-size: 0.5rem; }
  .ma-card b { font-size: 0.72rem; }
  .ma-card em { font-size: 0.48rem; }
  .ma-rows { display: none; }
  .mock-badge { display: none; }
  .mock-terminal .terminal-body { padding: 14px 14px 16px; }
  .mock-terminal .terminal-body pre { font-size: 0.66rem; }
  .mock-monitor { padding: 12px 12px 10px; }
  .mm-metrics { margin: 10px 0 8px; gap: 6px; }
  .mm-metrics b { font-size: 0.9rem; }
  .mm-chart { height: 78px; }
  .p2p-chip { display: none; }
  .slider-dots { margin-top: 18px; }
  .slider-hint { display: flex; margin-top: 9px; }

  .project-card { padding: 20px 18px 16px; }
  .pc-icon { width: 42px; height: 42px; border-radius: 12px; }
  .pc-flag { display: none; }
  .pc-desc { font-size: 0.85rem; }
  .pc-foot { margin-top: 15px; padding-top: 13px; }

  .pager { gap: 10px; margin-top: 30px; }
  .pager-btn { height: 38px; min-width: 38px; padding: 0 9px; border-radius: 11px; }
  .pager-info { margin: 0; }

  .stack-grid { grid-template-columns: 1fr; }
  .stack-card p { min-height: 0; }

  .about-points { grid-template-columns: 1fr; gap: 18px; }

  .cta-band { padding: 30px 22px; border-radius: var(--radius-lg); }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }

  .footer-cols { gap: 32px; justify-content: space-between; width: 100%; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .to-top { right: 16px; bottom: 16px; }

  .highlight-grid { grid-template-columns: 1fr; margin-top: 0; }
  .highlight { border-right: 0; border-bottom: 1px solid var(--line-soft); }
  .highlight:last-child { border-bottom: 0; }
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   DARK THEME
   通过 <html data-theme="dark"> 切换，只覆盖颜色，不动布局
   ========================================================= */
[data-theme="dark"] {
  color-scheme: dark;

  --sky-50:  color-mix(in srgb, var(--acc-500) 14%, #060c12);
  --sky-100: color-mix(in srgb, var(--acc-500) 20%, #060c12);
  --sky-200: color-mix(in srgb, var(--acc-500) 32%, #060c12);
  --sky-600: color-mix(in srgb, var(--acc-400) 78%, #ffffff);
  --sky-700: color-mix(in srgb, var(--acc-400) 62%, #ffffff);
  --sky-800: color-mix(in srgb, var(--acc-400) 42%, #ffffff);

  --ink-900: #e9f4fb;
  --ink-800: #d7e7f3;
  --ink-700: #c0d5e4;
  --ink-600: #a3bccd;
  --ink-500: #8aa5b8;
  --ink-400: #7b95a8;

  --line:      color-mix(in srgb, var(--acc-400) 18%, transparent);
  --line-soft: color-mix(in srgb, var(--acc-400) 10%, transparent);
  --card:      #0e1922;
  --bg:        #070d13;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 14px 40px -12px rgba(0, 0, 0, 0.65);
  --shadow-lg: 0 30px 70px -24px rgba(0, 0, 0, 0.75);
}

/* 切换瞬间的平滑过渡 */
html.theme-switching,
html.theme-switching *,
html.theme-switching *::before,
html.theme-switching *::after {
  transition:
    background-color 0.32s ease,
    border-color 0.32s ease,
    color 0.32s ease,
    box-shadow 0.32s ease !important;
}

/* nav */
[data-theme="dark"] .nav { background: rgba(7, 13, 19, 0.72); }
[data-theme="dark"] .nav.is-scrolled {
  background: rgba(9, 16, 23, 0.9);
  box-shadow: 0 8px 28px -20px #000;
}
[data-theme="dark"] .nav-btn-ghost,
[data-theme="dark"] .nav-toggle,
[data-theme="dark"] .theme-toggle {
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink-700);
}
[data-theme="dark"] .nav-links a:hover { background: color-mix(in srgb, var(--acc-400) 12%, transparent); }
[data-theme="dark"] .nav-links a.is-current { background: color-mix(in srgb, var(--acc-400) 14%, transparent); }

/* hero */
[data-theme="dark"] .hero {
  background:
    radial-gradient(1100px 540px at 50% -12%, color-mix(in srgb, var(--acc-700) 45%, transparent) 0%, color-mix(in srgb, var(--acc-700) 0%, transparent) 62%),
    radial-gradient(760px 420px at 88% 6%, color-mix(in srgb, var(--acc-800) 40%, transparent) 0%, color-mix(in srgb, var(--acc-800) 0%, transparent) 60%),
    radial-gradient(680px 400px at 6% 22%, color-mix(in srgb, var(--acc-800) 35%, transparent) 0%, color-mix(in srgb, var(--acc-800) 0%, transparent) 62%),
    linear-gradient(180deg, #08121b 0%, #08121b 58%, #070d13 100%);
}
[data-theme="dark"] .hero-grid {
  background-image:
    linear-gradient(color-mix(in srgb, var(--acc-400) 7%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--acc-400) 7%, transparent) 1px, transparent 1px);
}
[data-theme="dark"] .hero-glow { opacity: 0.45; }
[data-theme="dark"] .hero-glow-a {
  background: radial-gradient(circle, color-mix(in srgb, var(--acc-600) 55%, transparent) 0%, color-mix(in srgb, var(--acc-600) 0%, transparent) 70%);
}
[data-theme="dark"] .hero-glow-b {
  background: radial-gradient(circle, color-mix(in srgb, var(--acc-700) 50%, transparent) 0%, color-mix(in srgb, var(--acc-700) 0%, transparent) 70%);
}
/* 注意：这里必须用 background-image，不能用 background 简写。
   简写会把 background-clip 重置成 border-box，导致渐变铺满盒子、
   文字（-webkit-text-fill-color: transparent）整块看不见。 */
[data-theme="dark"] .hero-title .grad {
  background-image: linear-gradient(96deg,
    color-mix(in srgb, var(--acc-500) 62%, #ffffff) 0%,
    color-mix(in srgb, var(--acc-400) 82%, #ffffff) 44%,
    color-mix(in srgb, var(--acc-600) 60%, #ffffff) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .pill {
  background: rgba(14, 25, 34, 0.72);
  border-color: color-mix(in srgb, var(--acc-500) 22%, transparent);
  box-shadow: none;
}
[data-theme="dark"] .hero-stats {
  background: rgba(14, 25, 34, 0.6);
  border-color: var(--line);
  box-shadow: 0 14px 40px -28px rgba(0, 0, 0, 0.8);
}
[data-theme="dark"] .btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink-800);
}
[data-theme="dark"] .btn-ghost:hover { border-color: var(--sky-400); }
[data-theme="dark"] .slider-nav { background: rgba(16, 27, 38, 0.9); }
[data-theme="dark"] .slider-dot { background: color-mix(in srgb, var(--acc-400) 22%, transparent); }

/* slide accents（暗底需要更亮的字与渐变） */
[data-theme="dark"] .slide--indigo {
  --acc-grad: linear-gradient(96deg, #7f8cff 0%, #b3bcff 44%, #6a78f0 100%);
  --acc-ink: #a9b4ff;
  --acc-bar: linear-gradient(90deg, #b7c0ff, #7e8cf5);
  --acc-ico: #9aa6ff;
}
[data-theme="dark"] .slide--teal {
  --acc-grad: linear-gradient(96deg, #2fd0b4 0%, #8df0dd 44%, #23b8a0 100%);
  --acc-ink: #74e2cb;
  --acc-bar: linear-gradient(90deg, #8df0dd, #2fc4ac);
  --acc-ico: #5fdcc4;
}
[data-theme="dark"] .slide--amber {
  --acc-grad: linear-gradient(96deg, #e8a63a 0%, #ffd88a 46%, #d18f22 100%);
  --acc-ink: #f0bd63;
  --acc-bar: linear-gradient(90deg, #ffd88a, #e8a63a);
  --acc-ico: #f2bc5c;
}
[data-theme="dark"] .slide--rose {
  --acc-grad: linear-gradient(96deg, #ef6f9f 0%, #ffa9c9 44%, #d9558a 100%);
  --acc-ink: #f892b8;
  --acc-bar: linear-gradient(90deg, #ffa9c9, #ef6f9f);
  --acc-ico: #f489b2;
}

/* slide mocks */
[data-theme="dark"] .mock-admin {
  background: #0e1924;
  box-shadow:
    0 30px 60px -34px rgba(0, 0, 0, 0.8),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
[data-theme="dark"] .ma-side { background: linear-gradient(180deg, #101d29, #0c1620); }
[data-theme="dark"] .ma-main { background: #0a141d; }
[data-theme="dark"] .ma-search { background: #16232f; }
[data-theme="dark"] .ma-dots i { background: #26394a; }
[data-theme="dark"] .ma-nav { background: rgba(255, 255, 255, 0.06); }
[data-theme="dark"] .ma-card,
[data-theme="dark"] .ma-chart { background: #101c27; }
[data-theme="dark"] .ma-card em { color: #3ddc9a; }
[data-theme="dark"] .ma-rows i { background: linear-gradient(90deg, #16232f, #1b2b39); }
[data-theme="dark"] .mock-badge { background: rgba(15, 26, 37, 0.94); }
[data-theme="dark"] .mock-p2p { background: #0e1924; }
[data-theme="dark"] .pn { fill: #0e1924; }
[data-theme="dark"] .pn-text { fill: #9db8c9; }
[data-theme="dark"] .p2p-chip { background: rgba(14, 24, 34, 0.96); }
[data-theme="dark"] .p2p-links path { stroke: color-mix(in srgb, var(--acc-400) 50%, transparent); }

/* sections */
[data-theme="dark"] .projects {
  background:
    radial-gradient(900px 500px at 50% 0%, color-mix(in srgb, var(--acc-800) 35%, transparent) 0%, color-mix(in srgb, var(--acc-800) 0%, transparent) 62%),
    #070d13;
}
[data-theme="dark"] .about,
[data-theme="dark"] .contact { background: #070d13; }
[data-theme="dark"] .stack { background: linear-gradient(180deg, #0a141d 0%, #070d13 100%); }
[data-theme="dark"] .footer { background: linear-gradient(180deg, #08121a 0%, #05090e 100%); }

/* 新增：亮点条 & 滚动提示 */
[data-theme="dark"] .highlight-grid {
  background: rgba(14, 25, 34, 0.72);
  border-color: color-mix(in srgb, var(--acc-400) 16%, transparent);
  box-shadow: 0 22px 48px -30px rgba(0, 0, 0, 0.9);
}
[data-theme="dark"] .highlight { border-right-color: color-mix(in srgb, var(--acc-400) 10%, transparent); }
[data-theme="dark"] .highlight:nth-child(1),
[data-theme="dark"] .highlight:nth-child(2) { border-bottom-color: color-mix(in srgb, var(--acc-400) 10%, transparent); }
[data-theme="dark"] .highlight-text p { color: var(--ink-500); }
[data-theme="dark"] .scroll-cue .sc-chev {
  background: rgba(16, 27, 38, 0.9);
  border-color: color-mix(in srgb, var(--acc-400) 20%, transparent);
}

/* controls & cards */
[data-theme="dark"] .chip { background: #101c27; }
[data-theme="dark"] .chip em { background: rgba(255, 255, 255, 0.07); }
[data-theme="dark"] .pager-btn {
  background: #101c27;
  border-color: color-mix(in srgb, var(--acc-400) 14%, transparent);
}
[data-theme="dark"] .pager-btn:not(.is-active):hover:not(:disabled) {
  border-color: color-mix(in srgb, var(--acc-400) 34%, transparent);
}
[data-theme="dark"] .pager-num.is-active {
  color: #fff;
  background: color-mix(in srgb, var(--acc-500) 30%, #101c27);
  border-color: color-mix(in srgb, var(--acc-400) 48%, transparent);
  box-shadow: 0 6px 18px -8px color-mix(in srgb, var(--acc-500) 45%, transparent);
}
[data-theme="dark"] .search { background: #101c27; }
[data-theme="dark"] .search:focus-within { box-shadow: 0 0 0 4px color-mix(in srgb, var(--acc-400) 16%, transparent); }
[data-theme="dark"] .search-clear { background: rgba(255, 255, 255, 0.08); }
[data-theme="dark"] .project-card {
  background: #0e1923;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3), 0 18px 40px -30px rgba(0, 0, 0, 0.9);
}
[data-theme="dark"] .project-card:hover {
  border-color: color-mix(in srgb, var(--acc-500) 30%, transparent);
  box-shadow: 0 26px 50px -30px rgba(0, 0, 0, 0.9);
}
[data-theme="dark"] .pc-flag {
  background: linear-gradient(180deg, color-mix(in srgb, var(--acc-400) 18%, transparent), color-mix(in srgb, var(--acc-400) 10%, transparent));
  border-color: color-mix(in srgb, var(--acc-400) 28%, transparent);
}
[data-theme="dark"] .pc-tags span { background: #14212c; border-color: color-mix(in srgb, var(--acc-400) 10%, transparent); }
[data-theme="dark"] .pc-link,
[data-theme="dark"] .pc-arrow { background: #14212c; }
[data-theme="dark"] .pc-link:hover { background: #172c3b; border-color: color-mix(in srgb, var(--acc-400) 30%, transparent); }
[data-theme="dark"] .empty-state { background: #0b141c; }
[data-theme="dark"] .stack-card { background: rgba(255, 255, 255, 0.035); }
[data-theme="dark"] .point-icon {
  color: var(--sky-700);
  background: linear-gradient(180deg, color-mix(in srgb, var(--acc-400) 16%, transparent), color-mix(in srgb, var(--acc-400) 7%, transparent));
  border-color: color-mix(in srgb, var(--acc-400) 22%, transparent);
}
[data-theme="dark"] .about-card { background: linear-gradient(165deg, #101d29 0%, #0b141d 100%); }
[data-theme="dark"] .about-card::before { opacity: 0.5; }
[data-theme="dark"] .about-card-top h3 {
  background-image: linear-gradient(96deg, var(--sky-700), var(--sky-800));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
[data-theme="dark"] .mini-label,
[data-theme="dark"] .eyebrow { color: var(--sky-700); }
[data-theme="dark"] .eyebrow {
  background: color-mix(in srgb, var(--acc-400) 14%, transparent);
  border-color: color-mix(in srgb, var(--acc-400) 24%, transparent);
}
[data-theme="dark"] .projects-foot a { border-bottom-color: color-mix(in srgb, var(--acc-400) 40%, transparent); }
[data-theme="dark"] .btn-light { color: var(--acc-800); }
[data-theme="dark"] .to-top { background: rgba(16, 27, 38, 0.9); }

@media (max-width: 940px) {
  [data-theme="dark"] .nav-links {
    background: rgba(8, 15, 22, 0.98);
    box-shadow: 0 24px 40px -24px #000;
  }
}

/* CTA 横幅内的浅色小标签保持原样，不被通用 eyebrow 覆盖 */
[data-theme="dark"] .eyebrow-light {
  color: color-mix(in srgb, var(--acc-400) 90%, #fff);
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.24);
}
[data-theme="dark"] .empty-state { border-color: color-mix(in srgb, var(--acc-400) 22%, transparent); }

/* ---------- 版本切换下拉：深色 & 窄屏 ---------- */
[data-theme="dark"] .version-menu {
  background: rgba(13, 24, 33, 0.97);
  border-color: color-mix(in srgb, var(--acc-400) 20%, transparent);
  box-shadow:
    0 32px 64px -24px #000,
    0 0 0 1px rgba(255, 255, 255, 0.03);
}
[data-theme="dark"] .version-menu a:hover,
[data-theme="dark"] .version-menu a:focus-visible {
  background: linear-gradient(90deg, color-mix(in srgb, var(--acc-400) 20%, transparent), color-mix(in srgb, var(--acc-400) 4%, transparent));
}
[data-theme="dark"] .version-menu a .ico { color: var(--sky-700); }
[data-theme="dark"] .version-toggle { background: rgba(255, 255, 255, 0.05); }

@media (max-width: 640px) {
  .version-menu { width: min(278px, calc(100vw - 24px)); }
  .vm-text em { font-size: 0.68rem; }
}

/* ---------- 首屏「在线演示」菜单：条目更多，收紧行高 ---------- */
.version-menu--demo a { padding: 7px 10px; }
.version-menu--demo .vm-badge {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  font-size: 0.55rem;
}
.version-menu--demo .vm-text strong { font-size: 0.8rem; }
.version-menu--demo .vm-group {
  padding: 7px 10px 3px;
  line-height: 1.2;
}

[data-theme="dark"] .btn-dark {
  color: color-mix(in srgb, var(--acc-400) 13%, #fff);
  background: linear-gradient(158deg, #223648 0%, #142330 58%, #101c26 100%);
  border-color: color-mix(in srgb, var(--acc-400) 26%, transparent);
}

@media (max-width: 640px) {
  .version-menu--demo { width: min(316px, calc(100vw - 24px)); }
}
[data-theme="dark"] .btn-dark:hover { border-color: color-mix(in srgb, var(--acc-400) 50%, transparent); }

/* =========================================================
   主题色调色盘（右上角）
   ========================================================= */
.accent-wrap { position: static; flex: none; display: flex; }

.accent-toggle {
  position: relative;
  width: 38px;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  height: 38px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 99px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--sky-700);
  box-shadow: var(--shadow-xs);
  transition:
    color 0.25s,
    background 0.3s,
    border-color 0.25s,
    transform 0.35s var(--ease),
    box-shadow 0.3s;
}
.accent-toggle .ico { width: 18px; height: 18px; }
.accent-toggle:hover {
  color: var(--sky-600);
  border-color: var(--sky-300);
  transform: translateY(-1px) rotate(-8deg);
  box-shadow: 0 8px 20px -10px color-mix(in srgb, var(--acc-600) 65%, transparent);
}
.accent-toggle:active { transform: scale(0.94); }
.accent-toggle[aria-expanded="true"] {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(140deg, var(--acc-400), var(--acc-600));
  box-shadow: 0 8px 20px -8px color-mix(in srgb, var(--acc-600) 80%, transparent);
}

/* 右下角的小色点，随时提示当前主题色 */
.accent-toggle-dot {
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--acc-400), var(--acc-600));
  box-shadow: 0 0 0 2px #fff, 0 1px 3px rgba(0, 0, 0, 0.18);
  transition: background 0.35s, box-shadow 0.35s;
}
.accent-toggle:hover .accent-toggle-dot { transform: scale(1.12); }
.accent-toggle[aria-expanded="true"] .accent-toggle-dot {
  background: #fff;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--acc-600) 70%, transparent);
}

/* 无 JS 时调色盘不可用，直接隐藏，避免出现死按钮 */
html:not(.js) .accent-wrap { display: none; }

/* 浮层 */
.accent-pop {
  position: absolute;
  top: calc(100% + 18px);
  right: 0;
  z-index: 130;
  width: 312px;
  max-width: calc(100vw - 24px);
  padding: 16px 16px 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--line);
  box-shadow:
    0 32px 70px -26px color-mix(in srgb, var(--acc-800) 55%, transparent),
    0 2px 8px color-mix(in srgb, var(--acc-800) 8%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(22px) saturate(1.6);
  -webkit-backdrop-filter: blur(22px) saturate(1.6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.97);
  transform-origin: top right;
  transition:
    opacity 0.2s ease,
    transform 0.3s var(--ease),
    visibility 0.2s;
}
.accent-pop.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.ap-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 1px 2px 12px;
  border-bottom: 1px solid var(--line-soft);
}
.ap-title {
  font-size: 0.905rem;
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}
.ap-sub {
  margin-top: 3px;
  font-size: 0.685rem;
  line-height: 1.4;
  color: var(--ink-400);
  letter-spacing: 0.005em;
}
.ap-preview {
  margin-left: auto;
  width: 46px;
  height: 28px;
  flex: none;
  border-radius: 9px;
  background:
    radial-gradient(120% 120% at 20% 10%, rgba(255, 255, 255, 0.55), transparent 60%),
    linear-gradient(135deg, var(--acc-400) 0%, var(--acc-600) 100%);
  box-shadow:
    0 6px 14px -6px color-mix(in srgb, var(--acc-600) 85%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: background 0.4s, box-shadow 0.4s;
}

.ap-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 5px;
  padding: 12px 0 10px;
}
.ap-swatch {
  display: flex;
  flex-direction: column;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  align-items: center;
  gap: 7px;
  padding: 9px 2px 7px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: transparent;
  transition:
    background 0.22s,
    border-color 0.22s,
    transform 0.28s var(--ease);
}
.ap-swatch:hover {
  background: color-mix(in srgb, var(--acc-500) 7%, transparent);
  transform: translateY(-2px);
}
.ap-swatch.is-active {
  background: color-mix(in srgb, var(--acc-500) 9%, transparent);
  border-color: color-mix(in srgb, var(--acc-500) 20%, transparent);
}
.ap-dot {
  position: relative;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(140deg, var(--sw1), var(--sw2));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    0 5px 12px -5px color-mix(in srgb, var(--sw2) 75%, transparent);
  transition: box-shadow 0.28s var(--ease), transform 0.28s var(--ease);
}
.ap-swatch:hover .ap-dot { transform: scale(1.06); }
.ap-swatch.is-active .ap-dot {
  box-shadow:
    0 0 0 2px #fff,
    0 0 0 3.5px var(--sw2),
    0 6px 14px -5px color-mix(in srgb, var(--sw2) 75%, transparent);
}
.ap-dot .ico {
  width: 15px;
  height: 15px;
  color: #fff;
  opacity: 0;
  transform: scale(0.5);
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
  transition: opacity 0.2s, transform 0.28s var(--ease);
}
.ap-swatch.is-active .ap-dot .ico { opacity: 1; transform: none; }
.ap-name {
  font-size: 0.685rem;
  line-height: 1.2;
  font-weight: 600;
  color: var(--ink-500);
  letter-spacing: 0.01em;
  transition: color 0.22s;
}
.ap-swatch.is-active .ap-name { color: var(--ink-900); }

.ap-foot {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.655rem;
  color: var(--ink-400);
  letter-spacing: 0.005em;
}
.ap-foot .ico { width: 0.95em; height: 0.95em; color: var(--sky-600); flex: none; }

/* 调色盘深色适配 */
[data-theme="dark"] .accent-toggle {
  background: rgba(255, 255, 255, 0.05);
  color: var(--sky-700);
}
[data-theme="dark"] .accent-toggle[aria-expanded="true"] {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(140deg, var(--acc-400), var(--acc-600));
}
[data-theme="dark"] .accent-toggle-dot { box-shadow: 0 0 0 2px #0d1821, 0 1px 3px rgba(0, 0, 0, 0.5); }
[data-theme="dark"] .accent-pop {
  background: rgba(13, 24, 33, 0.96);
  border-color: color-mix(in srgb, var(--acc-400) 20%, transparent);
  box-shadow:
    0 34px 70px -24px #000,
    0 0 0 1px rgba(255, 255, 255, 0.03),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
[data-theme="dark"] .ap-preview { box-shadow: 0 6px 16px -6px color-mix(in srgb, var(--acc-600) 90%, transparent); }
[data-theme="dark"] .ap-swatch.is-active {
  background: color-mix(in srgb, var(--acc-400) 14%, transparent);
  border-color: color-mix(in srgb, var(--acc-400) 26%, transparent);
}
[data-theme="dark"] .ap-swatch.is-active .ap-dot {
  box-shadow:
    0 0 0 2px #0d1821,
    0 0 0 3.5px var(--sw2),
    0 6px 16px -5px color-mix(in srgb, var(--sw2) 80%, transparent);
}

/* 主题色切换时的柔和过渡（渐变会立即替换，其余颜色平滑过渡） */
html.accent-switching,
html.accent-switching *,
html.accent-switching *::before,
html.accent-switching *::after {
  transition:
    background-color 0.45s ease,
    border-color 0.45s ease,
    color 0.45s ease,
    box-shadow 0.45s ease,
    fill 0.45s ease,
    stroke 0.45s ease !important;
}

/* =========================================================
   顶部滚动进度条 & 无障碍跳转
   ========================================================= */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 150;
  pointer-events: none;
  background: color-mix(in srgb, var(--acc-500) 8%, transparent);
}
.scroll-progress span {
  display: block;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--acc-400), var(--acc-600) 55%, var(--acc-400));
  box-shadow: 0 0 14px color-mix(in srgb, var(--acc-500) 65%, transparent);
  transition: transform 0.08s linear;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 400;
  padding: 10px 20px;
  border-radius: 99px;
  background: linear-gradient(135deg, var(--acc-500), var(--acc-600));
  color: #fff;
  font-size: 0.845rem;
  font-weight: 600;
  box-shadow: 0 14px 28px -12px color-mix(in srgb, var(--acc-800) 80%, transparent);
  transform: translate(-50%, -180%);
  transition: transform 0.3s var(--ease);
}
.skip-link:focus {
  transform: translate(-50%, 0);
  outline-offset: 3px;
}

/* =========================================================
   视觉打磨
   ========================================================= */
/* SVG 渐变跟随主题色 */
.brand-grad-a { stop-color: var(--acc-400); }
.brand-grad-b { stop-color: var(--acc-700); }
.p2p-stop-a { stop-color: var(--acc-400); }
.p2p-stop-b { stop-color: var(--acc-700); }
.mm-area-stop { stop-color: var(--acc-400); }
.mm-line { stroke: var(--acc-400); }

/* 首屏背后的缓慢旋转光晕 */
.hero-halo {
  position: absolute;
  left: 50%;
  top: -320px;
  width: 980px;
  height: 980px;
  margin-left: -490px;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.5;
  background: conic-gradient(
    from 90deg at 50% 50%,
    color-mix(in srgb, var(--acc-400) 26%, transparent) 0deg,
    transparent 70deg,
    color-mix(in srgb, var(--acc-500) 18%, transparent) 140deg,
    transparent 220deg,
    color-mix(in srgb, var(--acc-300) 22%, transparent) 300deg,
    transparent 360deg
  );
  filter: blur(80px);
  -webkit-mask-image: radial-gradient(circle, #000 26%, transparent 68%);
  mask-image: radial-gradient(circle, #000 26%, transparent 68%);
  animation: haloSpin 46s linear infinite;
  transition: opacity 0.5s;
}
@keyframes haloSpin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
[data-theme="dark"] .hero-halo { opacity: 0.32; }

/* 主按钮的流光 */
.btn-primary {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}
.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(110deg, transparent 24%, rgba(255, 255, 255, 0.3) 46%, transparent 68%);
  transform: translateX(-130%);
  transition: transform 0.75s var(--ease);
  pointer-events: none;
}
.btn-primary:hover::after { transform: translateX(130%); }

/* 标题下方的细节装饰线 */
.section-head .section-title {
  position: relative;
  padding-bottom: 20px;
}
.section-head .section-title::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 58px;
  height: 3px;
  border-radius: 99px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, var(--acc-400), transparent);
}

/* 亮点条悬停时透出一点主题色 */
.highlight { transition: background 0.3s ease; }
.highlight:hover { background: color-mix(in srgb, var(--acc-500) 5%, transparent); }

/* 卡片悬停时描边更亮一点 */
.project-card:hover { box-shadow: var(--shadow-lg), 0 0 0 1px color-mix(in srgb, var(--acc-400) 22%, transparent); }

/* 页脚顶部细线 + 滚动条配色 */
.footer::before {
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--acc-400) 55%, transparent), transparent);
}

/* 调色盘窄屏适配 */
@media (max-width: 940px) {
  .accent-pop {
    right: 0;
    width: min(312px, calc(100vw - 28px));
  }
}
@media (max-width: 640px) {
  .nav-inner { gap: 14px; }
  .nav-actions { gap: 7px; }
  .brand-text em { display: none; }
  .accent-pop { padding: 14px 13px 12px; border-radius: 18px; }
  .ap-grid { gap: 2px; }
  .ap-name { font-size: 0.655rem; }
}
@media (max-width: 380px) {
  .nav-actions .nav-btn { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-halo { animation: none; opacity: 0.32; }
  .btn-primary::after { display: none; }
}

/* 减少动态偏好：主题色切换也立即完成 */
@media (prefers-reduced-motion: reduce) {
  html.accent-switching,
  html.accent-switching *,
  html.accent-switching *::before,
  html.accent-switching *::after {
    transition-duration: 0.001ms !important;
  }
}