/* ============================================================
   FileHash 官网样式
   纯静态 · 零外部依赖（系统字体栈 / 内联 SVG / 无 CDN）
   浅色「冷白青碧」为默认，深色为冷石墨；尊重 prefers-reduced-motion
   ============================================================ */

/* ---------- 设计 token（默认浅色「图标蓝」；深色冷蓝黑） ---------- */
:root {
  color-scheme: light;
  --bg-0: #fbfcfe;
  --bg-1: #ffffff;
  --bg-2: #f2f7fd;
  --surface: #ffffff;
  --surface-2: #f4f9fe;
  --surface-3: #ffffff;
  --surface-glass: rgba(251, 252, 254, 0.84);
  --border: #e1ebf5;
  --border-strong: #d0e0ef;
  --hairline: #e1ebf5;
  --text: #14212e;
  --text-2: #5a6c7d;
  --text-3: #5f7280;
  --accent: #0066cc;
  --accent-2: #0090e0;
  --accent-3: #4fb3f0;
  --accent-soft: rgba(0, 102, 204, 0.07);
  --accent-line: rgba(0, 102, 204, 0.24);
  --brand: #0066cc;
  --mint: #4fb3f0;
  --sky: #0090e0;
  --mist: #7fa8c9;
  --ok: #0066cc;
  --warn: #0077c8;
  --danger: #be123c;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --container: 1200px;
  --container-narrow: 880px;
  --header-h: 68px;
  --shadow-sm: 0 1px 2px rgba(20, 33, 46, 0.04);
  --shadow: 0 1px 2px rgba(20, 33, 46, 0.04), 0 10px 30px rgba(20, 33, 46, 0.06);
  --shadow-lg: 0 18px 48px rgba(20, 33, 46, 0.1);
  --shadow-soft: var(--shadow);
  --shadow-glow: 0 8px 22px rgba(0, 102, 204, 0.18);
  --ring: 0 0 0 3px rgba(0, 102, 204, 0.18);
  --grad-primary: linear-gradient(120deg, #004a99, #0066cc);
  --grad-sun: linear-gradient(120deg, #0066cc, #0090e0);
  --grad-text: linear-gradient(120deg, #004a99, #0066cc 55%, #0090e0);
  --grad-sky: linear-gradient(120deg, #0077c8, #0090e0);
  --header-bg: rgba(251, 252, 254, 0.84);
  --code-bg: #eaf3fd;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI",
    "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-mono: "Cascadia Code", "SF Mono", "SFMono-Regular", Consolas,
    "Liberation Mono", "Courier New", monospace;
  /* Canvas 冷蓝细光点（app.js 读取） */
  --fx-dot: 0, 102, 204;
  --fx-line: 0, 144, 224;
  --grid-line: rgba(20, 33, 46, 0.05);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg-0: #0c1a2c;
  --bg-1: #111f31;
  --bg-2: #16283d;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.065);
  --surface-3: rgba(255, 255, 255, 0.09);
  --surface-glass: rgba(12, 26, 44, 0.74);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.17);
  --hairline: rgba(255, 255, 255, 0.09);
  --text: #e8f1fa;
  --text-2: #b8c9dc;
  --text-3: #8fa6bf;
  --accent: #4fb3f0;
  --accent-2: #0090e0;
  --accent-3: #7cc4f5;
  --accent-soft: rgba(79, 179, 240, 0.12);
  --accent-line: rgba(79, 179, 240, 0.3);
  --brand: #4fb3f0;
  --mint: #4fb3f0;
  --sky: #0090e0;
  --mist: #7fa8c9;
  --ok: #4fb3f0;
  --warn: #4fb3f0;
  --danger: #fb7185;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.45), 0 14px 36px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.5);
  --shadow-soft: var(--shadow);
  --shadow-glow: 0 8px 22px rgba(79, 179, 240, 0.18);
  --ring: 0 0 0 3px rgba(79, 179, 240, 0.24);
  --grad-primary: linear-gradient(120deg, #004a99, #0066cc);
  --grad-sun: linear-gradient(120deg, #0066cc, #0077c8);
  --grad-text: linear-gradient(120deg, #a8d8fa, #7cc4f5 55%, #c9e6ff);
  --grad-sky: linear-gradient(120deg, #0077c8, #0090e0);
  --header-bg: rgba(12, 26, 44, 0.78);
  --code-bg: rgba(255, 255, 255, 0.05);
  /* Canvas 冷蓝光点 */
  --fx-dot: 79, 179, 240;
  --fx-line: 0, 144, 224;
  --grid-line: rgba(255, 255, 255, 0.04);
}

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

html {
  scroll-padding-top: calc(var(--header-h) + 18px);
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-0);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1100px 620px at 12% -8%, rgba(0, 144, 224, 0.16), transparent 62%),
    radial-gradient(900px 560px at 88% 0%, rgba(0, 102, 204, 0.1), transparent 60%),
    radial-gradient(820px 680px at 52% 108%, rgba(0, 119, 200, 0.08), transparent 66%),
    linear-gradient(180deg, #fcfdfe, #fcfdfe 52%, #fcfdfe);
}

html[data-theme="dark"] body::before {
  background:
    radial-gradient(1100px 620px at 12% -8%, rgba(0, 119, 200, 0.16), transparent 62%),
    radial-gradient(900px 560px at 88% 0%, rgba(0, 144, 224, 0.1), transparent 60%),
    radial-gradient(820px 680px at 52% 108%, rgba(56, 189, 248, 0.06), transparent 66%),
    linear-gradient(180deg, #0f1418, #141b20 55%, #0f1418);
}

img,
svg {
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-2);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: var(--accent-soft);
  color: var(--text);
}

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

.ico {
  width: 18px;
  height: 18px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sr-only,
.copy-live {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #04101f;
  font-weight: 700;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
  color: #04101f;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 120;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.6);
  pointer-events: none;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease,
    backdrop-filter 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(6, 9, 17, 0.72);
  border-bottom-color: var(--border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
}

html[data-theme="light"] .site-header.is-scrolled {
  background: rgba(244, 247, 252, 0.82);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.2px;
  white-space: nowrap;
}

.brand:hover {
  color: var(--text);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(145deg, #1a7ce6, var(--brand));
  box-shadow: 0 6px 18px rgba(0, 102, 204, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  display: grid;
  place-items: center;
}

.brand-fh {
  width: 100%;
  height: 100%;
}

.brand-fh text {
  fill: #fff;
  font-family: var(--font-sans);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.brand-text {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.brand-text i {
  font-style: normal;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 1px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  color: var(--text-2);
  font-size: 14.5px;
  font-weight: 500;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--text);
  background: var(--surface-2);
}

.nav-cta {
  display: flex;
  align-items: center;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease,
    transform 0.2s ease;
}

.icon-btn:hover {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border-strong);
}

.icon-btn:active {
  transform: translateY(1px);
}

.theme-toggle .ico-sun,
.theme-toggle .ico-moon {
  grid-area: 1 / 1;
  width: 19px;
  height: 19px;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.theme-toggle .ico-moon {
  opacity: 0;
  transform: rotate(-30deg) scale(0.6);
}

html[data-theme="light"] .theme-toggle .ico-sun {
  opacity: 0;
  transform: rotate(30deg) scale(0.6);
}

html[data-theme="light"] .theme-toggle .ico-moon {
  opacity: 1;
  transform: none;
}

.hamburger {
  display: none;
}

.hamburger .ico-open,
.hamburger .ico-close {
  grid-area: 1 / 1;
  transition: opacity 0.2s ease, transform 0.25s ease;
}

.hamburger .ico-close {
  opacity: 0;
  transform: rotate(-45deg);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 15px;
  font-weight: 650;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background 0.25s ease,
    border-color 0.25s ease, color 0.2s ease;
}

.btn .ico {
  width: 17px;
  height: 17px;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(120deg, #1a7ce6, #0066cc 45%, #0ea5c9);
  color: #fff;
  box-shadow: 0 10px 28px rgba(0, 102, 204, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  color: #fff;
  box-shadow: 0 14px 36px rgba(0, 102, 204, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-ghost:hover {
  background: var(--surface-2);
  border-color: var(--accent);
  color: var(--text);
}

.btn-sm {
  min-height: 38px;
  padding: 0 16px;
  font-size: 14px;
}

.btn[aria-disabled="true"],
.btn.is-disabled {
  pointer-events: none;
  opacity: 0.55;
  box-shadow: none;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 32px;
  overflow: hidden;
  isolation: isolate;
}

.fx-canvas {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  opacity: 0.75;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  z-index: -1;
  top: -180px;
  left: 50%;
  width: min(1100px, 130vw);
  height: 620px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(77, 157, 255, 0.16), transparent 62%);
  filter: blur(10px);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 22px;
  padding: 7px 15px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.14);
  animation: pulse-dot 2.4s ease-out infinite;
}

@keyframes pulse-dot {
  0% {
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.45);
  }
  70% {
    box-shadow: 0 0 0 9px rgba(52, 211, 153, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0);
  }
}

.hero-title {
  margin: 0 0 20px;
  font-size: clamp(52px, 7.2vw, 88px);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(100deg, #ffffff 8%, #b9dcff 38%, #7fe7ff 62%, #c8b6ff 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 60px rgba(77, 157, 255, 0.18);
}

html[data-theme="light"] .hero-title {
  background: linear-gradient(100deg, #0b2a5b 8%, #0057b7 42%, #007a9e 68%, #5b3bbd 95%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-title-cn {
  display: block;
  margin-top: 14px;
  font-size: clamp(17px, 2.2vw, 24px);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--text-2);
  background: none;
  -webkit-text-fill-color: currentColor;
}

.hero-lead {
  margin: 0 0 30px;
  max-width: 34em;
  color: var(--text-2);
  font-size: clamp(15.5px, 1.5vw, 18px);
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 30px;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--text-3);
  font-size: 13px;
}

.trust-row li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.trust-row .ico {
  width: 15px;
  height: 15px;
  color: var(--accent);
}

/* ---------- Hero 右侧版本信息卡 ---------- */
.hero-visual {
  perspective: 1200px;
}

.release-card {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: linear-gradient(160deg, rgba(13, 22, 39, 0.94), rgba(7, 12, 23, 0.96));
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  padding: 22px 22px 20px;
  overflow: hidden;
}

html[data-theme="light"] .release-card {
  background: linear-gradient(160deg, #ffffff, #eef3fb);
  box-shadow: var(--shadow);
}

.release-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  right: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.6;
}

.release-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.release-ver {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.release-build {
  font-size: 12.5px;
  color: var(--text-3);
  font-family: var(--font-mono);
}

.release-list {
  margin: 4px 0 0;
  padding: 0;
}

.release-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--border);
}

.release-row:last-child {
  border-bottom: 0;
}

.release-row dt {
  color: var(--text-2);
  font-size: 13.5px;
}

.release-row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.release-sign {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin: 12px 0 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  color: var(--text-3);
  font-size: 11.5px;
  line-height: 1.6;
}

.release-sign .ico {
  width: 15px;
  height: 15px;
  color: var(--accent);
  margin-top: 2px;
  flex: none;
}

.release-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.release-actions .btn {
  flex: 1 1 auto;
}

/* ---------- 统计 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 64px 0 0;
  padding: 0;
  list-style: none;
}

.stat {
  position: relative;
  padding: 22px 22px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--surface), transparent);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.stat::after {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  right: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.5;
}

.stat:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  background: var(--surface-2);
}

.stat-value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-size: clamp(34px, 3.4vw, 46px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(120deg, #ffffff, #9fd0ff 55%, #7fe7ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

html[data-theme="light"] .stat-value {
  background: linear-gradient(120deg, #072a55, #0066cc 60%, #0077c8);
  -webkit-background-clip: text;
  background-clip: text;
}

.stat-value .suffix {
  font-size: 0.5em;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--text-2);
  -webkit-text-fill-color: var(--text-2);
}

.stat-label {
  margin-top: 6px;
  font-size: 15px;
  font-weight: 650;
  color: var(--text);
}

.stat-desc {
  margin: 6px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-3);
}

/* ---------- 通用 section ---------- */
.section {
  position: relative;
  padding: clamp(72px, 9vw, 112px) 0;
}

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(148, 163, 184, 0.035) 18%, rgba(148, 163, 184, 0.035) 82%, transparent);
}

.section-head {
  max-width: 760px;
  margin-bottom: clamp(32px, 4vw, 52px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.h2 {
  margin: 0 0 16px;
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.015em;
}

.section-lead {
  margin: 0;
  color: var(--text-2);
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
}

/* ---------- 特性卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 26px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--surface), transparent 72%);
  overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease, background 0.35s ease,
    box-shadow 0.35s ease;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(77, 157, 255, 0.5), transparent 40%, transparent 70%, rgba(34, 211, 238, 0.35));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  background: var(--surface-2);
  box-shadow: var(--shadow-soft);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-ico {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  border: 1px solid var(--border);
  background: linear-gradient(150deg, var(--accent-soft), transparent);
  color: var(--accent);
}

.feature-ico .ico {
  width: 23px;
  height: 23px;
}

.feature-card h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.feature-card p {
  margin: 0;
  color: var(--text-2);
  font-size: 14.5px;
  line-height: 1.75;
}

/* ---------- 首页：产品文章 teaser ---------- */
.teaser {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background:
    radial-gradient(620px 220px at 10% 0%, rgba(77, 157, 255, 0.16), transparent 72%),
    radial-gradient(420px 200px at 96% 100%, rgba(34, 211, 238, 0.1), transparent 70%),
    linear-gradient(160deg, var(--surface-2), var(--surface));
  box-shadow: var(--shadow-soft);
}

.teaser-main .h2 {
  margin-bottom: 14px;
}

.teaser-excerpt {
  margin: 0 0 18px;
  max-width: 40em;
  color: var(--text-2);
  font-size: clamp(14.5px, 1.4vw, 16px);
  line-height: 1.85;
}

.teaser-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.teaser-stats li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--text-3);
  font-size: 12.5px;
}

.teaser-stats strong {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
}

.teaser-link .ico {
  width: 16px;
  height: 16px;
}

.teaser-aside {
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(0, 0, 0, 0.16);
}

html[data-theme="light"] .teaser-aside {
  background: rgba(15, 23, 42, 0.035);
}

.teaser-quote {
  margin: 0 0 12px;
  color: var(--text);
  font-size: clamp(16px, 1.6vw, 19px);
  font-weight: 700;
  line-height: 1.65;
}

.teaser-meta {
  margin: 0;
  color: var(--text-3);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ---------- 实测性能 ---------- */
.bench-highlights {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 26px;
}

.bench-hl {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.bench-hl .ico {
  width: 26px;
  height: 26px;
  color: var(--accent);
}

.bench-hl.is-top {
  border-color: rgba(0, 144, 224, 0.35);
  background: linear-gradient(150deg, rgba(0, 144, 224, 0.09), var(--surface));
}

.bench-hl.is-top .ico {
  color: var(--warn);
}

.bench-hl strong {
  display: block;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.bench-hl span {
  display: block;
  font-size: 12.5px;
  color: var(--text-3);
}

.bench-hl .hl-label {
  color: var(--text-2);
  font-weight: 600;
}

.bench {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(170deg, var(--surface), transparent 65%);
  padding: clamp(20px, 3vw, 32px);
}

.bench-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin-bottom: 18px;
}

.bench-tools-label {
  font-size: 12.5px;
  color: var(--text-3);
}

.unit-toggle {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
}

.unit-toggle button {
  padding: 5px 13px;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.unit-toggle button:hover {
  color: var(--text);
}

.unit-toggle button.is-active {
  background: var(--accent-soft);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(77, 157, 255, 0.35);
}

.bench-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.bench-row {
  display: grid;
  grid-template-columns: minmax(112px, 168px) minmax(0, 1fr) minmax(92px, 128px);
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
}

.bench-name {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.bench-type {
  flex: none;
  padding: 2px 7px;
  border-radius: 6px;
  border: 1px solid var(--border);
  color: var(--text-3);
  font-family: var(--font-sans);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.bench-row[data-type="fast"] .bench-type {
  color: var(--accent);
  border-color: rgba(77, 157, 255, 0.32);
  background: rgba(77, 157, 255, 0.08);
}

.bench-row[data-type="blake3"] .bench-type {
  color: var(--accent-3);
  border-color: rgba(167, 139, 250, 0.32);
  background: rgba(167, 139, 250, 0.08);
}

.bench-row[data-type="xxh3"] .bench-type {
  color: var(--warn);
  border-color: rgba(0, 144, 224, 0.35);
  background: rgba(0, 144, 224, 0.09);
}

.bench-track {
  position: relative;
  height: 12px;
  border-radius: var(--radius-pill);
  background: rgba(148, 163, 184, 0.12);
  overflow: hidden;
}

.bench-track::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 10% 100%;
  opacity: 0.7;
}

.bench-fill {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, #3b82f6, #22d3ee);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 1.05s cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: transform;
}

.bench-row[data-type="legacy"] .bench-fill {
  background: linear-gradient(90deg, #64748b, #94a3b8);
}

.bench-row[data-type="fast"] .bench-fill {
  background: linear-gradient(90deg, #0090e0, #4d9dff 60%, #22d3ee);
}

.bench-row[data-type="blake3"] .bench-fill {
  background: linear-gradient(90deg, #7c3aed, #a78bfa 70%, #c4b5fd);
}

.bench-row[data-type="xxh3"] .bench-fill {
  background: linear-gradient(90deg, #0077c8, #f59e0b 55%, #4fb3f0);
  box-shadow: 0 0 18px rgba(0, 144, 224, 0.35);
}

.bench.is-in .bench-fill {
  transform: scaleX(var(--pct, 0));
}

.bench-value {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.bench-value small {
  margin-left: 3px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-3);
}

.bench-row[data-type="xxh3"] .bench-value {
  color: var(--warn);
}

.bench-footnote {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  color: var(--text-3);
  font-size: 12.5px;
  line-height: 1.75;
}

/* ---------- 下载 ---------- */
.dl-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.dl-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--surface), transparent 70%);
  transition: border-color 0.3s ease, transform 0.3s ease, background 0.3s ease;
}

.dl-card:hover {
  border-color: var(--border-strong);
  background: var(--surface-2);
  transform: translateY(-2px);
}

.dl-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.dl-ico {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--accent-soft);
  color: var(--accent);
}

.dl-ico .ico {
  width: 22px;
  height: 22px;
}

.dl-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
}

.dl-sub {
  margin: 3px 0 0;
  color: var(--text-3);
  font-size: 13px;
  line-height: 1.6;
}

.dl-tag {
  margin-left: auto;
  flex: none;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(77, 157, 255, 0.35);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 11.5px;
  font-weight: 700;
  white-space: nowrap;
}

.dl-tag[data-tag="推荐"] {
  border-color: rgba(52, 211, 153, 0.35);
  background: rgba(52, 211, 153, 0.1);
  color: var(--ok);
}

.dl-tag[data-tag="免安装"] {
  border-color: rgba(167, 139, 250, 0.35);
  background: rgba(167, 139, 250, 0.1);
  color: var(--accent-3);
}

.dl-file {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  word-break: break-all;
}

.dl-meta {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.18);
}

html[data-theme="light"] .dl-meta {
  background: rgba(15, 23, 42, 0.035);
}

.dl-meta-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.dl-meta-row dt {
  color: var(--text-3);
  font-size: 11.5px;
  letter-spacing: 0.04em;
}

.dl-meta-row dd {
  margin: 0;
  min-width: 0;
  font-size: 12.5px;
  color: var(--text-2);
}

.dl-meta-row dd code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-2);
  overflow-wrap: anywhere;
}

.dl-meta-row dd.is-pending code {
  color: var(--warn);
  font-style: italic;
}

.copy-btn {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-3);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.copy-btn .ico {
  width: 15px;
  height: 15px;
}

.copy-btn:hover:not([disabled]) {
  color: var(--text);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.copy-btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}

.copy-btn.is-copied {
  color: var(--ok);
  border-color: rgba(52, 211, 153, 0.5);
  background: rgba(52, 211, 153, 0.1);
}

.dl-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
}

.dl-actions .btn {
  flex: 1;
}

.dl-note {
  margin: 22px 0 0;
  color: var(--text-3);
  font-size: 12.5px;
  line-height: 1.7;
}

/* ---------- 运行界面（真实截图网格） ---------- */
.ui-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.ui-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  cursor: zoom-in;
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}

.ui-figure:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  background: var(--surface-2);
}

.ui-figure:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.ui-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  object-position: center center;
  background: #0a0e16;
  border-bottom: 1px solid var(--border);
}

.ui-figure figcaption {
  margin-top: auto;
  padding: 12px 16px 14px;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.65;
}

html[data-theme="light"] .ui-figure img {
  background: #f2f5fa;
}

/* ---------- 使用流程 ---------- */
.flow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.step {
  display: flex;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.step-no {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  background: var(--accent-soft);
  border: 1px solid rgba(77, 157, 255, 0.35);
}

.step-body h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
}

.step-body p {
  margin: 0;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.7;
}

.flow-figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  cursor: zoom-in;
}

.flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 380px;
  object-fit: cover;
  object-position: top center;
  border-bottom: 1px solid var(--border);
}

.flow-figure figcaption {
  padding: 10px 14px;
  color: var(--text-3);
  font-size: 12px;
}

/* ---------- 性能与测试方法 ---------- */
.method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.method-card {
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.method-card h3 {
  margin: 0 0 10px;
  font-size: 16px;
}

.method-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--text-2);
  font-size: 13.5px;
  line-height: 1.8;
}

.method-card li {
  margin: 5px 0;
}

.method-note {
  margin: 12px 0 0;
  color: var(--text-3);
  font-size: 12.5px;
  line-height: 1.6;
}

/* ---------- 技术规格 ---------- */
.spec-table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.spec-table th,
.spec-table td {
  padding: 14px 18px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
  line-height: 1.7;
}

.spec-table tr:last-child th,
.spec-table tr:last-child td {
  border-bottom: 0;
}

.spec-table th {
  width: 170px;
  color: var(--text);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.03);
  white-space: nowrap;
}

.spec-table td {
  color: var(--text-2);
}

html[data-theme="light"] .spec-table th {
  background: rgba(15, 23, 42, 0.03);
}

/* ---------- 验证与可信 ---------- */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.trust-card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.trust-ico {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 12px;
}

.trust-ico .ico {
  width: 20px;
  height: 20px;
}

.trust-card h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
}

.trust-card p {
  margin: 0;
  color: var(--text-2);
  font-size: 13.5px;
  line-height: 1.75;
}

.trust-card code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
  background: var(--surface-2);
  padding: 1px 5px;
  border-radius: 4px;
}

.trust-figure {
  margin: 24px 0 0;
  max-width: 760px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  cursor: zoom-in;
}

.trust-figure img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: 520px;
  height: auto;
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
}

.trust-figure figcaption {
  padding: 10px 14px;
  color: var(--text-3);
  font-size: 12px;
}

/* ---------- 图片预览 lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vw, 48px);
  background: rgba(3, 6, 12, 0.86);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox-figure {
  margin: 0;
  max-width: min(1200px, 96vw);
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.lightbox-figure img {
  max-width: 100%;
  max-height: calc(88vh - 56px);
  width: auto;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
  object-fit: contain;
  background: #0a0e16;
}

.lightbox-figure figcaption {
  color: var(--text-2);
  font-size: 13px;
  text-align: center;
}

.lightbox-close {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: rgba(10, 15, 25, 0.8);
  color: var(--text);
  cursor: pointer;
}

.lightbox-close:hover {
  background: rgba(20, 28, 44, 0.9);
}

.lightbox-close .ico {
  width: 20px;
  height: 20px;
}

body.lightbox-open {
  overflow: hidden;
}


/* ---------- FAQ ---------- */
.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.faq-item:hover {
  border-color: var(--border-strong);
}

.faq-item[open] {
  background: var(--surface-2);
  border-color: var(--border-strong);
}

.faq-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px 20px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 650;
  color: var(--text);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  transition: transform 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.faq-item[open] summary::after {
  content: "+";
  transform: rotate(45deg);
  color: var(--accent);
  border-color: rgba(77, 157, 255, 0.45);
}

.faq-a {
  padding: 0 20px 18px;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.85;
}

.faq-a p {
  margin: 0;
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, rgba(148, 163, 184, 0.04));
  padding: 52px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: start;
}

.footer-tagline {
  margin: 16px 0 6px;
  color: var(--text-2);
  font-size: 13.5px;
}

.footer-verify {
  margin: 0;
  color: var(--text-3);
  font-size: 12px;
  font-family: var(--font-mono);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  padding-top: 8px;
}

.footer-links a {
  color: var(--text-2);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-links .ico {
  width: 13px;
  height: 13px;
  opacity: 0.7;
}

.footer-meta {
  padding-top: 8px;
  color: var(--text-3);
  font-size: 12.5px;
  text-align: right;
}

.footer-meta p {
  margin: 0 0 6px;
}

/* ---------- no-script ---------- */
.noscript {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  margin: 24px auto;
}

.noscript h2 {
  margin-top: 0;
  font-size: 20px;
}

.noscript ul {
  margin: 0;
  padding-left: 20px;
}

/* ---------- 滚动渐显 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: calc(var(--i, 0) * 55ms);
  will-change: opacity, transform;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero-visual {
    max-width: 640px;
  }

  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bench-highlights {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bench-highlights .bench-hl:last-child {
    grid-column: span 2;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-meta {
    grid-column: span 2;
    text-align: left;
  }
}

@media (max-width: 900px) {
  :root {
    --header-h: 62px;
  }

  .container {
    padding: 0 18px;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 99;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 14px 18px 20px;
    border-bottom: 1px solid var(--border);
    background: rgba(6, 9, 17, 0.96);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    backdrop-filter: blur(20px) saturate(150%);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  }

  html[data-theme="light"] .nav {
    background: rgba(244, 247, 252, 0.97);
    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.12);
  }

  .site-header.nav-open .nav {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 16px;
  }

  .nav-cta {
    margin-top: 12px;
  }

  .nav-cta .btn {
    width: 100%;
  }

  .hamburger {
    display: inline-grid;
  }

  .site-header.nav-open .hamburger .ico-open {
    opacity: 0;
    transform: rotate(45deg);
  }

  .site-header.nav-open .hamburger .ico-close {
    opacity: 1;
    transform: none;
  }

  body.nav-locked {
    overflow: hidden;
  }

  .hero {
    padding-top: calc(var(--header-h) + 44px);
  }

  .hero-title {
    font-size: clamp(44px, 11vw, 62px);
  }

  .stats {
    margin-top: 48px;
  }

  .teaser {
    grid-template-columns: 1fr;
  }

  .dl-grid {
    grid-template-columns: 1fr;
  }

  .bench-row {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "name value"
      "track track";
    row-gap: 9px;
  }

  .bench-name {
    grid-area: name;
  }

  .bench-track {
    grid-area: track;
  }

  .bench-value {
    grid-area: value;
  }

  .bench-highlights {
    grid-template-columns: 1fr;
  }

  .bench-highlights .bench-hl:last-child {
    grid-column: auto;
  }
}

@media (max-width: 720px) {
  .brand-text i {
    display: none;
  }

  .hero-cta .btn {
    flex: 1 1 100%;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-meta {
    grid-column: auto;
  }

  .dl-meta-row {
    grid-template-columns: 52px minmax(0, 1fr) auto;
  }

  .section {
    padding: 64px 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-lead br {
    display: none;
  }

  .hero-title-cn {
    letter-spacing: 0.1em;
  }

  .stat {
    padding: 18px;
  }
}

/* ---------- 尊重「减少动态效果」偏好 ---------- */
@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;
    transition-delay: 0s !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero-badge .dot {
    animation: none !important;
  }

  .fx-canvas {
    opacity: 0.35;
  }
}

/* ---------- 改版新增组件的响应式 ---------- */
@media (max-width: 1100px) {
  .trust-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .flow-grid {
    grid-template-columns: 1fr;
  }

  .method-grid {
    grid-template-columns: 1fr;
  }

  .release-card {
    max-width: 560px;
  }
}

@media (max-width: 720px) {
  .ui-gallery {
    grid-template-columns: 1fr;
  }

  .trust-grid {
    grid-template-columns: 1fr;
  }

  .spec-table,
  .spec-table tbody,
  .spec-table tr,
  .spec-table th,
  .spec-table td {
    display: block;
    width: auto;
  }

  .spec-table th {
    padding-bottom: 4px;
    border-bottom: 0;
    background: transparent;
  }

  .spec-table td {
    padding-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lightbox,
  .ui-figure,
  .trust-figure,
  .flow-figure {
    transition: none;
  }
}

/* ============================================================
   v3「阳光」主题覆盖层
   浅色为默认；深色为暖石墨。仅视觉层，不动布局/文案/结构。
   ============================================================ */

/* ---------- 全局氛围 ---------- */
html[data-theme] body {
  letter-spacing: 0.004em;
}

html[data-theme] body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
  background-image: radial-gradient(rgba(22, 33, 43, 0.055) 1px, transparent 1px);
  background-size: 4px 4px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 62%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 62%);
}

html[data-theme="dark"] body::after {
  opacity: 0.35;
  background-image: radial-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px);
}

html[data-theme] ::selection {
  background: rgba(0, 102, 204, 0.24);
  color: var(--text);
}

html[data-theme] :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  box-shadow: var(--ring);
  border-radius: 8px;
}

html[data-theme] .scroll-progress {
  background: linear-gradient(90deg, #0066cc, #4fb3f0 58%, #0ea5e9);
  box-shadow: 0 0 12px rgba(0, 102, 204, 0.4);
}

/* ---------- 导航 ---------- */
html[data-theme] .site-header {
  background: transparent;
  border-bottom: 1px solid transparent;
}

html[data-theme] .site-header.is-scrolled {
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(20px) saturate(1.25);
  backdrop-filter: blur(20px) saturate(1.25);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

html[data-theme] .brand-mark {
  background: var(--grad-primary);
  border-radius: 13px;
  box-shadow: 0 8px 18px rgba(0, 102, 204, 0.26), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

html[data-theme] .brand-text {
  color: var(--text);
}

html[data-theme] .brand-text i {
  color: var(--text-3);
}

html[data-theme] .nav-link {
  color: var(--text-2);
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

html[data-theme] .nav-link:hover {
  color: var(--text);
  background: rgba(0, 102, 204, 0.08);
}

html[data-theme] .nav-link.is-active {
  color: #0066cc;
  background: rgba(0, 102, 204, 0.12);
  box-shadow: inset 0 0 0 1px rgba(0, 102, 204, 0.22);
}

html[data-theme="dark"] .nav-link.is-active {
  color: #a8d8fa;
  background: rgba(0, 119, 200, 0.16);
  box-shadow: inset 0 0 0 1px rgba(0, 119, 200, 0.24);
}

html[data-theme] .icon-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-2);
  box-shadow: var(--shadow-sm);
}

html[data-theme] .icon-btn:hover {
  color: var(--brand);
  border-color: var(--accent-line);
  background: var(--surface-3);
  transform: translateY(-1px);
}

/* ---------- 按钮 ---------- */
html[data-theme] .btn {
  border-radius: 14px;
  letter-spacing: 0.01em;
}

html[data-theme] .btn-primary {
  background: var(--grad-primary);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: var(--shadow-glow), inset 0 1px 0 rgba(255, 255, 255, 0.38);
}

html[data-theme] .btn-primary:hover {
  background: var(--grad-sun);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(0, 102, 204, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

html[data-theme] .btn-primary .ico {
  color: #ffffff;
}

html[data-theme] .btn-ghost {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

html[data-theme] .btn-ghost:hover {
  background: var(--surface-3);
  border-color: var(--accent-line);
  color: #0066cc;
  transform: translateY(-1px);
}

html[data-theme] .btn-sm {
  border-radius: 12px;
}

/* ---------- Hero ---------- */
html[data-theme] .fx-canvas {
  opacity: 0.75;
}

html[data-theme="dark"] .fx-canvas {
  opacity: 0.55;
}

html[data-theme] .hero-glow {
  background:
    radial-gradient(ellipse 60% 46% at 46% 18%, rgba(0, 144, 224, 0.2), transparent 70%),
    radial-gradient(ellipse 46% 40% at 84% 8%, rgba(0, 102, 204, 0.11), transparent 72%),
    radial-gradient(ellipse 50% 42% at 16% 30%, rgba(0, 119, 200, 0.1), transparent 74%);
  filter: blur(6px);
}

html[data-theme="dark"] .hero-glow {
  background:
    radial-gradient(ellipse 58% 46% at 46% 18%, rgba(0, 119, 200, 0.2), transparent 70%),
    radial-gradient(ellipse 46% 40% at 84% 8%, rgba(0, 144, 224, 0.1), transparent 72%),
    radial-gradient(ellipse 50% 42% at 16% 30%, rgba(56, 189, 248, 0.08), transparent 74%);
}

html[data-theme] .hero-badge {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border);
  color: var(--text-2);
  box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

html[data-theme="dark"] .hero-badge {
  background: rgba(255, 255, 255, 0.06);
}

html[data-theme] .hero-badge .dot {
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.16);
}

html[data-theme] .hero-title {
  background: linear-gradient(100deg, #1c2430 6%, #003a78 38%, #0066cc 68%, #0066cc 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: none;
  letter-spacing: -0.03em;
}

html[data-theme="dark"] .hero-title {
  background: linear-gradient(100deg, #f5f8fa 6%, #a8d8fa 40%, #4fb3f0 66%, #a8d8fa 98%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

html[data-theme] .hero-title-cn {
  color: var(--text-2);
}

html[data-theme] .hero-lead {
  color: var(--text-2);
}

html[data-theme] .trust-row {
  gap: 8px;
  flex-wrap: wrap;
}

html[data-theme] .trust-row li {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--text-2);
  box-shadow: var(--shadow-sm);
}

html[data-theme="dark"] .trust-row li {
  background: rgba(255, 255, 255, 0.05);
}

html[data-theme] .trust-row .ico {
  color: var(--brand);
}

/* ---------- Hero 版本卡 ---------- */
html[data-theme] .release-card {
  background: linear-gradient(165deg, #ffffff 0%, #ffffff 52%, #f5f8fa 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

html[data-theme="dark"] .release-card {
  background: linear-gradient(165deg, #171e24, #141a1f 62%, #151b20);
  border-color: var(--border);
}

html[data-theme] .release-card::before {
  background: linear-gradient(90deg, transparent, rgba(0, 102, 204, 0.5), rgba(0, 144, 224, 0.4), transparent);
  opacity: 0.8;
}

html[data-theme] .release-head {
  border-bottom-color: var(--border);
}

html[data-theme] .release-ver {
  color: var(--text);
  letter-spacing: -0.01em;
}

html[data-theme] .release-build {
  color: var(--text-3);
}

html[data-theme] .release-row {
  border-bottom-color: var(--border);
}

html[data-theme] .release-row dt {
  color: var(--text-2);
}

html[data-theme] .release-row dd {
  color: var(--text);
}

html[data-theme] .release-actions .btn {
  flex: 1 1 auto;
}

/* ---------- 统计卡 ---------- */
html[data-theme] .stats {
  gap: 14px;
}

html[data-theme] .stat {
  background: linear-gradient(160deg, #ffffff, #ffffff);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

html[data-theme="dark"] .stat {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
}

html[data-theme] .stat::after {
  background: linear-gradient(90deg, rgba(0, 102, 204, 0.55), rgba(0, 144, 224, 0.4), rgba(0, 119, 200, 0.35));
  opacity: 0.8;
}

html[data-theme] .stat:hover {
  transform: translateY(-3px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow);
}

html[data-theme] .stat-value,
html[data-theme="light"] .stat-value {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

html[data-theme] .stat-value .suffix {
  -webkit-text-fill-color: currentColor;
  color: #0066cc;
}

html[data-theme="dark"] .stat-value .suffix {
  color: #a8d8fa;
}

html[data-theme] .stat-label {
  color: var(--text);
}

html[data-theme] .stat-desc {
  color: var(--text-3);
}

/* ---------- 区块标题 ---------- */
html[data-theme] .section-alt {
  background: linear-gradient(180deg, rgba(245, 248, 250, 0.55), rgba(252, 253, 254, 0));
}

html[data-theme="dark"] .section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent);
}

html[data-theme] .eyebrow {
  color: #0066cc;
  background: rgba(0, 102, 204, 0.09);
  border: 1px solid rgba(0, 102, 204, 0.2);
  border-radius: 999px;
  padding: 5px 12px;
  letter-spacing: 0.08em;
}

html[data-theme="dark"] .eyebrow {
  color: #a8d8fa;
  background: rgba(0, 119, 200, 0.1);
  border-color: rgba(0, 119, 200, 0.24);
}

html[data-theme] .h2 {
  color: var(--text);
  letter-spacing: -0.025em;
}

html[data-theme] .section-lead {
  color: var(--text-2);
}

/* ---------- 功能卡 ---------- */
html[data-theme] .feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

html[data-theme="dark"] .feature-card {
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
}

html[data-theme] .feature-card::before {
  background: linear-gradient(120deg, rgba(0, 102, 204, 0.9), rgba(0, 144, 224, 0.75) 55%, rgba(0, 119, 200, 0.6));
  opacity: 0;
  transition: opacity 0.25s ease;
}

html[data-theme] .feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow);
}

html[data-theme] .feature-card:hover::before {
  opacity: 1;
}

html[data-theme] .feature-ico {
  background: linear-gradient(150deg, rgba(0, 102, 204, 0.13), rgba(0, 144, 224, 0.12) 60%, rgba(0, 119, 200, 0.1));
  border: 1px solid rgba(0, 102, 204, 0.18);
  border-radius: 14px;
  color: var(--brand);
}

html[data-theme] .feature-card h3 {
  color: var(--text);
}

html[data-theme] .feature-card p {
  color: var(--text-2);
}

/* ---------- 运行界面图框 ---------- */
html[data-theme] .ui-figure,
html[data-theme] .flow-figure {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

html[data-theme] .ui-figure:hover,
html[data-theme] .flow-figure:hover {
  transform: translateY(-2px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow);
}

html[data-theme] .ui-figure img,
html[data-theme] .flow-figure img {
  background: #f5f8fa;
  border-bottom: 1px solid var(--border);
}

html[data-theme="dark"] .ui-figure img,
html[data-theme="dark"] .flow-figure img {
  background: #101216;
}

html[data-theme] .ui-figure figcaption,
html[data-theme] .flow-figure figcaption {
  color: var(--text-2);
}

/* ---------- 性能 ---------- */
html[data-theme] .bench {
  background: linear-gradient(165deg, #ffffff, #ffffff);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

html[data-theme="dark"] .bench {
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02));
}

html[data-theme] .bench-hl {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

html[data-theme] .bench-hl.is-top {
  background: linear-gradient(150deg, rgba(0, 102, 204, 0.1), #ffffff 72%);
  border-color: rgba(0, 102, 204, 0.28);
}

html[data-theme="dark"] .bench-hl.is-top {
  background: linear-gradient(150deg, rgba(0, 119, 200, 0.14), rgba(255, 255, 255, 0.03));
}

html[data-theme] .bench-hl strong {
  color: var(--text);
}

html[data-theme] .bench-hl span,
html[data-theme] .bench-hl .hl-label {
  color: var(--text-3);
}

html[data-theme] .bench-hl .ico {
  color: var(--brand);
}

html[data-theme] .bench-tools-label {
  color: var(--text-3);
}

html[data-theme] .unit-toggle {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
}

html[data-theme] .unit-toggle button {
  border-radius: 999px;
  color: var(--text-3);
}

html[data-theme] .unit-toggle button:hover {
  color: var(--text);
}

html[data-theme] .unit-toggle button.is-active {
  background: var(--surface);
  color: #0066cc;
  box-shadow: var(--shadow-sm);
}

html[data-theme] .bench-name {
  color: var(--text);
}

html[data-theme] .bench-value {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

html[data-theme] .bench-track {
  background: #eaf1f5;
}

html[data-theme="dark"] .bench-track {
  background: rgba(255, 255, 255, 0.08);
}

html[data-theme] .bench-track::before {
  background: rgba(255, 255, 255, 0.55);
}

html[data-theme] .bench-row[data-type="legacy"] .bench-fill {
  background: linear-gradient(90deg, #94a3b8, #c4b5a5);
}

html[data-theme] .bench-row[data-type="fast"] .bench-fill {
  background: linear-gradient(90deg, #0066cc, #0066cc 55%, #4fb3f0);
}

html[data-theme] .bench-row[data-type="blake3"] .bench-fill {
  background: linear-gradient(90deg, #0284c7, #0ea5e9 55%, #4fb3f0);
}

html[data-theme] .bench-row[data-type="xxh3"] .bench-fill {
  background: linear-gradient(90deg, #0077c8, #f59e0b 50%, #4fb3f0);
  box-shadow: 0 0 16px rgba(0, 144, 224, 0.32);
}

html[data-theme="dark"] .bench-row[data-type="legacy"] .bench-fill {
  background: linear-gradient(90deg, #64748b, #94a3b8);
}

html[data-theme] .bench-type {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-3);
}

html[data-theme] .bench-row[data-type="fast"] .bench-type {
  background: rgba(0, 102, 204, 0.1);
  border-color: rgba(0, 102, 204, 0.24);
  color: #0066cc;
}

html[data-theme] .bench-row[data-type="blake3"] .bench-type {
  background: rgba(0, 119, 200, 0.1);
  border-color: rgba(0, 119, 200, 0.24);
  color: #0369a1;
}

html[data-theme] .bench-row[data-type="xxh3"] .bench-type {
  background: rgba(0, 144, 224, 0.14);
  border-color: rgba(0, 144, 224, 0.3);
  color: #0066cc;
}

html[data-theme="dark"] .bench-row[data-type="fast"] .bench-type {
  color: #a8d8fa;
}

html[data-theme="dark"] .bench-row[data-type="blake3"] .bench-type {
  color: #a8d8fa;
}

html[data-theme="dark"] .bench-row[data-type="xxh3"] .bench-type {
  color: #a8d8fa;
}

html[data-theme] .bench-row[data-type="fast"] .bench-value {
  color: #0066cc;
}

html[data-theme] .bench-row[data-type="blake3"] .bench-value {
  color: #0369a1;
}

html[data-theme] .bench-row[data-type="xxh3"] .bench-value {
  color: #0066cc;
}

html[data-theme="dark"] .bench-row[data-type="fast"] .bench-value {
  color: #a8d8fa;
}

html[data-theme="dark"] .bench-row[data-type="blake3"] .bench-value {
  color: #a8d8fa;
}

html[data-theme="dark"] .bench-row[data-type="xxh3"] .bench-value {
  color: #a8d8fa;
}

html[data-theme] .bench-footnote {
  color: var(--text-3);
}

/* ---------- 方法 / 流程 ---------- */
html[data-theme] .method-card,
html[data-theme] .step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

html[data-theme="dark"] .method-card,
html[data-theme="dark"] .step {
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02));
}

html[data-theme] .method-card h3,
html[data-theme] .step-body h3 {
  color: var(--text);
}

html[data-theme] .method-card ul,
html[data-theme] .method-card li,
html[data-theme] .step-body p,
html[data-theme] .method-note {
  color: var(--text-2);
}

html[data-theme] .method-note {
  color: var(--text-3);
}

html[data-theme] .step-no {
  background: rgba(0, 102, 204, 0.1);
  border: 1px solid rgba(0, 102, 204, 0.24);
  color: #0066cc;
}

html[data-theme="dark"] .step-no {
  color: #a8d8fa;
}

/* ---------- 下载 ---------- */
html[data-theme] .dl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

html[data-theme="dark"] .dl-card {
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
}

html[data-theme] .dl-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow);
}

html[data-theme] .dl-card[data-kind="store"] {
  background: linear-gradient(160deg, #ffffff, #f2f9ff 70%, #eef7ff);
}

html[data-theme="dark"] .dl-card[data-kind="store"] {
  background: linear-gradient(160deg, rgba(56, 189, 248, 0.06), rgba(255, 255, 255, 0.02));
}

html[data-theme] .dl-ico {
  background: linear-gradient(150deg, rgba(0, 102, 204, 0.14), rgba(0, 144, 224, 0.12));
  border: 1px solid rgba(0, 102, 204, 0.2);
  color: var(--brand);
  border-radius: 12px;
}

html[data-theme] .dl-title {
  color: var(--text);
}

html[data-theme] .dl-sub {
  color: var(--text-2);
}

html[data-theme] .dl-tag {
  background: rgba(0, 102, 204, 0.1);
  border: 1px solid rgba(0, 102, 204, 0.22);
  color: #0066cc;
}

html[data-theme="dark"] .dl-tag {
  color: #a8d8fa;
}

html[data-theme] .dl-file {
  color: var(--text-3);
}

html[data-theme] .dl-meta {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

html[data-theme] .dl-meta-row dt {
  color: var(--text-3);
}

html[data-theme] .dl-meta-row dd,
html[data-theme] .dl-meta-row dd code {
  color: var(--text);
}

html[data-theme] .copy-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-2);
  border-radius: 10px;
}

html[data-theme] .copy-btn:hover:not([disabled]) {
  color: #0066cc;
  border-color: var(--accent-line);
  background: var(--surface-3);
}

html[data-theme] .copy-btn.is-copied {
  color: var(--ok);
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.08);
}

html[data-theme] .dl-note {
  color: var(--text-3);
}

/* ---------- 规格 / 可信 / FAQ ---------- */
html[data-theme] .spec-table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

html[data-theme] .spec-table th {
  background: #f7fafc;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

html[data-theme="dark"] .spec-table th {
  background: rgba(255, 255, 255, 0.05);
}

html[data-theme] .spec-table td {
  color: var(--text-2);
}

html[data-theme] .spec-table tr {
  transition: background 0.2s ease;
}

html[data-theme] .spec-table tr:hover th,
html[data-theme] .spec-table tr:hover td {
  background: #f5f8fa;
}

html[data-theme="dark"] .spec-table tr:hover th,
html[data-theme="dark"] .spec-table tr:hover td {
  background: rgba(0, 119, 200, 0.06);
}

html[data-theme] .trust-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

html[data-theme="dark"] .trust-card {
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02));
}

html[data-theme] .trust-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow);
}

html[data-theme] .trust-ico {
  background: linear-gradient(150deg, rgba(0, 102, 204, 0.12), rgba(0, 119, 200, 0.1));
  border: 1px solid rgba(0, 102, 204, 0.18);
  border-radius: 12px;
  color: var(--brand);
}

html[data-theme] .trust-card h3 {
  color: var(--text);
}

html[data-theme] .trust-card p {
  color: var(--text-2);
}

html[data-theme] .trust-card code {
  background: var(--code-bg);
  color: #0066cc;
}

html[data-theme] .faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

html[data-theme="dark"] .faq-item {
  background: rgba(255, 255, 255, 0.04);
}

html[data-theme] .faq-item:hover {
  border-color: var(--accent-line);
}

html[data-theme] .faq-item[open] {
  border-color: var(--accent-line);
  box-shadow: var(--shadow);
}

html[data-theme] .faq-item summary {
  color: var(--text);
}

html[data-theme] .faq-item summary::after {
  color: var(--brand);
}

html[data-theme] .faq-a,
html[data-theme] .faq-a p {
  color: var(--text-2);
}

/* ---------- 首页文章 teaser ---------- */
html[data-theme] .teaser {
  background:
    radial-gradient(620px 240px at 6% 0%, rgba(0, 144, 224, 0.16), transparent 70%),
    radial-gradient(420px 220px at 96% 100%, rgba(0, 119, 200, 0.12), transparent 72%),
    linear-gradient(135deg, #ffffff, #f5f8fa 52%, #f2f7f8);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

html[data-theme="dark"] .teaser {
  background:
    radial-gradient(620px 240px at 6% 0%, rgba(0, 119, 200, 0.1), transparent 70%),
    linear-gradient(135deg, #141b20, #1a2229);
}

html[data-theme] .teaser-stats strong {
  color: #0066cc;
}

html[data-theme] .teaser-stats span {
  color: var(--text-3);
}

html[data-theme] .teaser-aside {
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

html[data-theme="dark"] .teaser-aside {
  background: rgba(255, 255, 255, 0.04);
}

html[data-theme] .teaser-quote {
  color: var(--text-2);
}

html[data-theme] .teaser-meta {
  color: var(--text-3);
}

/* ---------- 页脚 ---------- */
html[data-theme] .site-footer {
  background: linear-gradient(180deg, rgba(245, 248, 250, 0.55), rgba(252, 253, 254, 0.92));
  border-top: 1px solid var(--border);
}

html[data-theme="dark"] .site-footer {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.04));
}

html[data-theme] .footer-tagline {
  color: var(--text-2);
}

html[data-theme] .footer-verify {
  color: var(--text-3);
}

html[data-theme] .footer-links a {
  color: var(--text-2);
  border-radius: 8px;
}

html[data-theme] .footer-links a:hover {
  color: #0066cc;
  background: rgba(0, 102, 204, 0.08);
}

html[data-theme] .footer-links .ico {
  color: var(--text-3);
}

html[data-theme] .footer-meta,
html[data-theme] .footer-meta p {
  color: var(--text-3);
}

/* ---------- Lightbox ---------- */
html[data-theme] .lightbox {
  background: rgba(44, 33, 22, 0.62);
  -webkit-backdrop-filter: blur(16px) saturate(1.1);
  backdrop-filter: blur(16px) saturate(1.1);
}

html[data-theme="dark"] .lightbox {
  background: rgba(8, 9, 12, 0.72);
}

html[data-theme] .lightbox-figure img {
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow-lg);
}

html[data-theme] .lightbox-figure figcaption {
  color: #f5f8fa;
}

html[data-theme] .lightbox-close {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

html[data-theme] .lightbox-close:hover {
  background: #ffffff;
  color: var(--brand);
}

/* ---------- 移动端导航 ---------- */
@media (max-width: 900px) {
  html[data-theme] .site-header.nav-open {
    background: rgba(252, 253, 254, 0.96);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
  }

  html[data-theme="dark"] .site-header.nav-open {
    background: rgba(20, 22, 26, 0.97);
  }

  html[data-theme] .site-header .nav {
    background: var(--surface);
    border-top: 1px solid var(--border);
    box-shadow: var(--shadow);
    border-radius: 0 0 var(--radius) var(--radius);
  }

  html[data-theme] .site-header .nav-link {
    border-radius: 12px;
  }
}

/* ---------- 文章页协调（style 先于 article.css 加载，需更高优先级） ---------- */
html[data-theme] body.article-page {
  background: transparent;
}

html[data-theme] .article-page .article-hero,
html[data-theme] .article-page .article-body {
  color: var(--text);
}

html[data-theme] .article-page .article-lead {
  color: var(--text-2);
  background: linear-gradient(90deg, rgba(0, 102, 204, 0.1), rgba(0, 144, 224, 0.06));
  border-left: 3px solid var(--accent);
  border-radius: 0 14px 14px 0;
}

html[data-theme] .article-page .article-meta {
  color: var(--text-3);
}

html[data-theme] .article-page .article-body h2 {
  color: var(--text);
}

html[data-theme] .article-page .article-body h3 {
  color: var(--text);
}

html[data-theme] .article-page .article-body p,
html[data-theme] .article-page .article-body li {
  color: var(--text-2);
}

html[data-theme] .article-page .article-body strong {
  color: var(--text);
}

html[data-theme] .article-page .article-body code {
  background: var(--code-bg);
  color: #0066cc;
  border-color: var(--border);
}

html[data-theme] .article-page .article-body blockquote {
  background: linear-gradient(90deg, rgba(0, 102, 204, 0.08), transparent);
  border-left: 3px solid var(--accent);
  color: var(--text-2);
}

html[data-theme] .article-page .article-stats li,
html[data-theme] .article-page .article-bench li,
html[data-theme] .article-page .article-figure {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

html[data-theme] .article-page .toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

html[data-theme] .article-page .toc a {
  color: var(--text-2);
}

html[data-theme] .article-page .toc a.is-active {
  color: #0066cc;
  background: rgba(0, 102, 204, 0.1);
  border-left-color: var(--accent);
}

html[data-theme] .article-page .article-inline-cta,
html[data-theme] .article-page .article-cta {
  background: linear-gradient(135deg, #ffffff, #f5f8fa 55%, #f2f7f8);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

html[data-theme="dark"] .article-page .article-inline-cta,
html[data-theme="dark"] .article-page .article-cta {
  background: linear-gradient(135deg, #141b20, #182129);
}

html[data-theme] .article-page .article-breadcrumb a {
  color: var(--text-2);
}

html[data-theme] .article-page .article-breadcrumb a:hover {
  color: #0066cc;
}

html[data-theme] .article-page .article-body a {
  color: #0066cc;
  border-bottom-color: rgba(0, 102, 204, 0.35);
}

html[data-theme] .article-page .article-body .article-section:first-of-type > p:first-of-type::first-letter {
  color: #0066cc;
  font-size: 3em;
  margin: 6px 10px 0 0;
}

html[data-theme="dark"] .article-page .article-body .article-section:first-of-type > p:first-of-type::first-letter {
  color: #a8d8fa;
}

/* ============================================================
   v4「冷白青碧」布局/组件重做
   近白冷调 · 墨蓝灰文字 · 青碧/雾蓝点缀 · hairline + 01/02 编号
   与 v3 覆盖层同前缀，靠后者生效；只做视觉与排版，不动结构/文案。
   ============================================================ */

/* ---------- 基底与背景 ---------- */
html[data-theme] body {
  background: var(--bg-0);
  line-height: 1.75;
  letter-spacing: 0.006em;
}

html[data-theme] body::before {
  background:
    radial-gradient(900px 540px at 8% -12%, rgba(0, 102, 204, 0.06), transparent 62%),
    radial-gradient(760px 500px at 92% -4%, rgba(0, 144, 224, 0.05), transparent 60%),
    radial-gradient(700px 520px at 50% 108%, rgba(0, 119, 200, 0.03), transparent 68%),
    linear-gradient(180deg, #fcfdfe, #ffffff 46%, #fcfdfe);
}

html[data-theme="dark"] body::before {
  background:
    radial-gradient(900px 540px at 8% -12%, rgba(79, 179, 240, 0.07), transparent 62%),
    radial-gradient(760px 500px at 92% -4%, rgba(79, 179, 240, 0.05), transparent 60%),
    linear-gradient(180deg, #0f1418, #121a20 50%, #0f1418);
}

html[data-theme] body::after {
  opacity: 0.45;
  background-image: radial-gradient(rgba(22, 33, 43, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.35), transparent 42%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.35), transparent 42%);
}

html[data-theme="dark"] body::after {
  opacity: 0.28;
  background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
}

html[data-theme] .hero-glow {
  background:
    radial-gradient(ellipse 58% 42% at 40% 10%, rgba(0, 102, 204, 0.07), transparent 72%),
    radial-gradient(ellipse 46% 36% at 86% 0%, rgba(0, 144, 224, 0.05), transparent 74%);
  filter: blur(10px);
}

html[data-theme="dark"] .hero-glow {
  background:
    radial-gradient(ellipse 58% 42% at 40% 10%, rgba(79, 179, 240, 0.09), transparent 72%),
    radial-gradient(ellipse 46% 36% at 86% 0%, rgba(79, 179, 240, 0.06), transparent 74%);
}

html[data-theme] .fx-canvas {
  opacity: 0.5;
}

html[data-theme="dark"] .fx-canvas {
  opacity: 0.4;
}

html[data-theme] .scroll-progress {
  background: linear-gradient(90deg, #0066cc, #0077c8 55%, #0090e0);
  box-shadow: none;
}

/* ---------- 留白与标题分级 ---------- */
html[data-theme] .section {
  padding: clamp(72px, 9vw, 118px) 0;
}

html[data-theme] .section-alt {
  background: var(--bg-2);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

html[data-theme] main {
  counter-reset: sec;
}

html[data-theme] main > section.section {
  counter-increment: sec;
}

html[data-theme] .section-head {
  margin-bottom: clamp(32px, 4vw, 52px);
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: none;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

html[data-theme] .section-head .eyebrow::before {
  content: counter(sec, decimal-leading-zero);
  margin-right: 10px;
  color: var(--accent);
  letter-spacing: 0.1em;
}

html[data-theme="dark"] .eyebrow {
  color: var(--text-3);
  background: none;
  border: 0;
}

html[data-theme] .h2 {
  margin-top: 12px;
  font-size: clamp(27px, 3.2vw, 38px);
  line-height: 1.24;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--text);
}

html[data-theme] .section-lead {
  max-width: 64ch;
  margin-top: 10px;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 导航（hairline + 下划线当前项） ---------- */
html[data-theme] .site-header,
html[data-theme] .site-header.is-scrolled {
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(18px) saturate(1.1);
  backdrop-filter: blur(18px) saturate(1.1);
  border-bottom: 1px solid var(--hairline);
  box-shadow: none;
}

html[data-theme] .site-header:not(.is-scrolled) {
  background: rgba(252, 253, 254, 0.6);
}

html[data-theme="dark"] .site-header:not(.is-scrolled) {
  background: rgba(15, 20, 24, 0.6);
}

html[data-theme] .brand-mark {
  background: #0066cc;
  border-radius: 9px;
  box-shadow: none;
}

html[data-theme] .brand-text {
  font-weight: 600;
  letter-spacing: -0.01em;
}

html[data-theme] .nav-link {
  padding: 6px 2px;
  border-radius: 0;
  background: none;
  color: var(--text-2);
  font-size: 14px;
}

html[data-theme] .nav-link:hover {
  background: none;
  color: var(--text);
}

html[data-theme] .nav-link.is-active,
html[data-theme="dark"] .nav-link.is-active {
  background: none;
  box-shadow: none;
  color: var(--text);
  border-bottom: 1px solid var(--accent);
}

html[data-theme] .nav-cta .btn {
  border-radius: 9px;
}

html[data-theme] .icon-btn {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 9px;
  box-shadow: none;
  color: var(--text-2);
}

html[data-theme] .icon-btn:hover {
  background: var(--surface-2);
  border-color: var(--border-strong);
  color: var(--text);
  transform: none;
}

/* ---------- 按钮（实心墨青 + 细描边） ---------- */
html[data-theme] .btn {
  border-radius: 9px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

html[data-theme] .btn-primary {
  background: #0066cc;
  border: 1px solid #0066cc;
  color: #ffffff;
  box-shadow: none;
}

html[data-theme] .btn-primary:hover {
  background: #004a99;
  border-color: #004a99;
  color: #ffffff;
  transform: none;
  box-shadow: none;
}

html[data-theme="dark"] .btn-primary {
  background: #0090e0;
  border-color: #0090e0;
  color: #0a2540;
}

html[data-theme="dark"] .btn-primary:hover {
  background: #4fb3f0;
  border-color: #4fb3f0;
  color: #0a2540;
}

html[data-theme] .btn-ghost {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  color: var(--text);
  box-shadow: none;
}

html[data-theme] .btn-ghost:hover {
  background: var(--surface-2);
  border-color: var(--text);
  color: var(--text);
  transform: none;
}

html[data-theme] .btn-sm {
  border-radius: 8px;
}

/* ---------- Hero 编辑式排版 ---------- */
html[data-theme] .hero {
  padding: clamp(44px, 6vw, 76px) 0 clamp(32px, 4vw, 52px);
}

html[data-theme] .hero-grid {
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}

html[data-theme] .hero-copy {
  border-top: 1px solid var(--hairline);
  padding-top: 26px;
}

html[data-theme] .hero-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 30px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: none;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

html[data-theme] .hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  box-shadow: none;
  animation: none;
}

html[data-theme] .hero-title,
html[data-theme="light"] .hero-title {
  background: none;
  -webkit-background-clip: border-box;
  background-clip: border-box;
  -webkit-text-fill-color: currentColor;
  color: var(--text);
  text-shadow: none;
  font-size: clamp(56px, 8.2vw, 104px);
  line-height: 0.98;
  font-weight: 650;
  letter-spacing: -0.045em;
}

html[data-theme="dark"] .hero-title {
  background: none;
  -webkit-background-clip: border-box;
  background-clip: border-box;
  -webkit-text-fill-color: currentColor;
  color: var(--text);
}

html[data-theme] .hero-title-cn {
  display: block;
  margin-top: 20px;
  color: var(--text-2);
  font-size: clamp(16px, 1.5vw, 20px);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

html[data-theme] .hero-lead {
  max-width: 58ch;
  margin: 24px 0 0;
  color: var(--text-2);
  font-size: 15.5px;
  line-height: 1.85;
}

html[data-theme] .hero-cta {
  margin-top: 34px;
  gap: 12px;
}

html[data-theme] .trust-row {
  margin-top: 30px;
  gap: 24px;
}

html[data-theme] .trust-row li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: none;
  box-shadow: none;
  color: var(--text-2);
  font-size: 12.5px;
}

html[data-theme] .trust-row .ico {
  width: 14px;
  height: 14px;
  color: var(--accent);
}

/* ---------- 版本信息白纸卡 ---------- */
html[data-theme] .release-card,
html[data-theme="light"] .release-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  box-shadow: none;
  padding: 24px 22px;
}

html[data-theme="dark"] .release-card {
  background: var(--surface);
}

html[data-theme] .release-card::before {
  display: none;
}

html[data-theme] .release-head {
  padding-bottom: 15px;
  border-bottom: 1px solid var(--hairline);
}

html[data-theme] .release-ver {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

html[data-theme] .release-build {
  color: var(--text-3);
  font-size: 11.5px;
}

html[data-theme] .release-row {
  padding: 10px 0;
  border-bottom: 1px solid var(--hairline);
}

html[data-theme] .release-row dt {
  color: var(--text-2);
  font-size: 12.5px;
}

html[data-theme] .release-row dd {
  color: var(--text);
  font-size: 12.5px;
}

html[data-theme] .release-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 18px;
}

html[data-theme] .release-actions .btn {
  flex: none;
  width: 100%;
}

/* ---------- 统计：横向 hairline strip ---------- */
html[data-theme] .stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: clamp(36px, 5vw, 60px);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

html[data-theme] .stat {
  padding: 24px 26px;
  border: 0;
  border-radius: 0;
  background: none;
  box-shadow: none;
  transition: background 0.2s ease;
}

html[data-theme] .stat + .stat {
  border-left: 1px solid var(--hairline);
}

html[data-theme] .stat:hover {
  transform: none;
  border: 0;
  box-shadow: none;
  background: var(--surface-2);
}

html[data-theme] .stat::after {
  display: none;
}

html[data-theme] .stat-value,
html[data-theme="light"] .stat-value {
  background: none;
  -webkit-background-clip: border-box;
  background-clip: border-box;
  -webkit-text-fill-color: currentColor;
  color: var(--text);
  font-size: clamp(30px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.025em;
}

html[data-theme] .stat-value .suffix,
html[data-theme="dark"] .stat-value .suffix {
  color: var(--text-2);
}

html[data-theme] .stat-label {
  margin-top: 6px;
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
}

html[data-theme] .stat-desc {
  margin-top: 6px;
  color: var(--text-3);
  font-size: 12px;
  line-height: 1.65;
}

/* ---------- 功能：hairline 网格 + 01/02 编号 ---------- */
html[data-theme] .feature-grid {
  counter-reset: feat;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .feature-card {
  counter-increment: feat;
  position: relative;
  padding: 28px 28px 24px;
  border: 0;
  border-bottom: 1px solid var(--hairline);
  border-radius: 0;
  background: none;
  box-shadow: none;
  transition: background 0.2s ease;
}

html[data-theme] .feature-card::before {
  content: "0" counter(feat);
  position: absolute;
  top: 22px;
  right: 24px;
  left: auto;
  bottom: auto;
  width: auto;
  height: auto;
  border: 0;
  background: none;
  opacity: 0.55;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
}

html[data-theme] .feature-card:hover {
  transform: none;
  border-color: var(--hairline);
  box-shadow: none;
  background: var(--surface-2);
}

html[data-theme] .feature-card:hover::before {
  opacity: 1;
  color: var(--accent);
}

html[data-theme] .feature-ico {
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: none;
  color: var(--accent);
}

html[data-theme] .feature-ico .ico {
  width: 19px;
  height: 19px;
}

html[data-theme] .feature-card h3 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 15.5px;
  font-weight: 600;
}

html[data-theme] .feature-card p {
  margin: 0;
  color: var(--text-2);
  font-size: 13.5px;
  line-height: 1.75;
}

/* ---------- 运行界面：浏览器窗口式细框 ---------- */
html[data-theme] .ui-gallery {
  gap: 18px;
}

html[data-theme] .ui-figure {
  position: relative;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(22, 33, 43, 0.04);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

html[data-theme] .ui-figure::before {
  content: "";
  display: block;
  height: 30px;
  background-color: var(--surface-2);
  background-image:
    radial-gradient(circle at 15px 15px, var(--border-strong) 0 3.2px, transparent 3.8px),
    radial-gradient(circle at 31px 15px, var(--border-strong) 0 3.2px, transparent 3.8px),
    radial-gradient(circle at 47px 15px, var(--border-strong) 0 3.2px, transparent 3.8px);
  border-bottom: 1px solid var(--hairline);
}

html[data-theme] .ui-figure:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}

html[data-theme] .ui-figure img,
html[data-theme="light"] .ui-figure img {
  background: var(--surface-2);
  border-bottom: 1px solid var(--hairline);
}

html[data-theme="dark"] .ui-figure img {
  background: #081120;
}

html[data-theme] .ui-figure figcaption {
  padding: 12px 16px;
  color: var(--text-2);
  font-size: 12.5px;
  line-height: 1.65;
}

html[data-theme] .flow-figure {
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(22, 33, 43, 0.04);
}

html[data-theme] .flow-figure img {
  background: var(--surface-2);
  border-bottom: 1px solid var(--hairline);
}

/* ---------- 性能：细轨道 + 青→雾蓝 ---------- */
html[data-theme] .bench {
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: none;
  padding: 26px 28px;
}

html[data-theme] .bench-highlights {
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

html[data-theme] .bench-hl {
  padding: 18px 24px;
  border: 0;
  border-radius: 0;
  background: none;
  box-shadow: none;
}

html[data-theme] .bench-hl + .bench-hl {
  border-left: 1px solid var(--hairline);
}

html[data-theme] .bench-hl.is-top {
  background: var(--surface-2);
  border-color: transparent;
}

html[data-theme] .bench-hl strong {
  color: var(--text);
  font-weight: 600;
}

html[data-theme] .bench-hl span,
html[data-theme] .bench-hl .hl-label {
  color: var(--text-3);
  font-size: 12.5px;
}

html[data-theme] .bench-hl .ico {
  color: var(--accent);
}

html[data-theme] .bench-tools-label {
  color: var(--text-3);
  font-size: 12px;
}

html[data-theme] .unit-toggle {
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: var(--surface-2);
  padding: 2px;
}

html[data-theme] .unit-toggle button {
  border-radius: 6px;
  color: var(--text-3);
  font-size: 12px;
}

html[data-theme] .unit-toggle button.is-active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(22, 33, 43, 0.06);
}

html[data-theme] .bench-list {
  gap: 4px;
}

html[data-theme] .bench-track {
  height: 6px;
  border-radius: 999px;
  background: #edf3f6;
}

html[data-theme="dark"] .bench-track {
  background: rgba(255, 255, 255, 0.08);
}

html[data-theme] .bench-track::before {
  background: rgba(255, 255, 255, 0.6);
}

html[data-theme] .bench-row[data-type="legacy"] .bench-fill {
  background: linear-gradient(90deg, #9fb0bd, #c7d3dc);
}

html[data-theme] .bench-row[data-type="fast"] .bench-fill {
  background: linear-gradient(90deg, #0066cc, #4fb3f0);
}

html[data-theme] .bench-row[data-type="blake3"] .bench-fill {
  background: linear-gradient(90deg, #0077c8, #4fb3f0);
}

html[data-theme] .bench-row[data-type="xxh3"] .bench-fill {
  background: linear-gradient(90deg, #004a99, #0090e0);
  box-shadow: none;
}

html[data-theme="dark"] .bench-row[data-type="legacy"] .bench-fill {
  background: linear-gradient(90deg, #64748b, #94a3b8);
}

html[data-theme] .bench-type {
  border: 1px solid var(--hairline);
  border-radius: 4px;
  background: none;
  color: var(--text-3);
  font-size: 11px;
}

html[data-theme] .bench-row[data-type="fast"] .bench-type {
  border-color: rgba(0, 102, 204, 0.3);
  color: #0066cc;
  background: none;
}

html[data-theme] .bench-row[data-type="blake3"] .bench-type {
  border-color: rgba(0, 119, 200, 0.3);
  color: #0077c8;
  background: none;
}

html[data-theme] .bench-row[data-type="xxh3"] .bench-type {
  border-color: rgba(30, 64, 175, 0.3);
  color: #004a99;
  background: none;
}

html[data-theme="dark"] .bench-row[data-type="fast"] .bench-type {
  color: #a8d8fa;
}

html[data-theme="dark"] .bench-row[data-type="blake3"] .bench-type {
  color: #a8d8fa;
}

html[data-theme="dark"] .bench-row[data-type="xxh3"] .bench-type {
  color: #a8d8fa;
}

html[data-theme] .bench-value {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

html[data-theme] .bench-row[data-type="fast"] .bench-value {
  color: #0066cc;
}

html[data-theme] .bench-row[data-type="blake3"] .bench-value {
  color: #0077c8;
}

html[data-theme] .bench-row[data-type="xxh3"] .bench-value {
  color: #004a99;
}

html[data-theme="dark"] .bench-row[data-type="fast"] .bench-value {
  color: #a8d8fa;
}

html[data-theme="dark"] .bench-row[data-type="blake3"] .bench-value {
  color: #a8d8fa;
}

html[data-theme="dark"] .bench-row[data-type="xxh3"] .bench-value {
  color: #a8d8fa;
}

html[data-theme] .bench-footnote {
  color: var(--text-3);
  font-size: 12px;
  line-height: 1.7;
}

/* ---------- 方法 / 流程：hairline 分栏 ---------- */
html[data-theme] .method-grid {
  gap: 0;
  border-top: 1px solid var(--hairline);
  margin-top: 28px;
}

html[data-theme] .method-card {
  padding: 26px 32px 26px 0;
  border: 0;
  border-radius: 0;
  background: none;
  box-shadow: none;
}

html[data-theme] .method-card + .method-card {
  padding-left: 32px;
  border-left: 1px solid var(--hairline);
}

html[data-theme] .method-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

html[data-theme] .method-card ul,
html[data-theme] .method-card li {
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.85;
}

html[data-theme] .method-note {
  color: var(--text-3);
  font-size: 12px;
}

html[data-theme] .steps {
  gap: 0;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .step {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border: 0;
  border-bottom: 1px solid var(--hairline);
  border-radius: 0;
  background: none;
  box-shadow: none;
}

html[data-theme] .step-no {
  width: 32px;
  height: 32px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: none;
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
}

html[data-theme] .step-body h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

html[data-theme] .step-body p {
  color: var(--text-2);
  font-size: 13.5px;
  line-height: 1.8;
}

/* ---------- 规格表：hairline 表格 ---------- */
html[data-theme] .spec-table-wrap {
  border: 0;
  border-radius: 0;
  background: none;
  box-shadow: none;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .spec-table th,
html[data-theme] .spec-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--hairline);
  background: none;
}

html[data-theme] .spec-table th {
  width: 180px;
  background: none;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}

html[data-theme] .spec-table td {
  color: var(--text);
  font-size: 14px;
}

html[data-theme] .spec-table tr:hover th,
html[data-theme] .spec-table tr:hover td {
  background: var(--surface-2);
}

/* ---------- 下载：hairline 网格 ---------- */
html[data-theme] .dl-grid {
  gap: 0;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .dl-card {
  padding: 26px;
  border: 0;
  border-bottom: 1px solid var(--hairline);
  border-right: 1px solid var(--hairline);
  border-radius: 0;
  background: none;
  box-shadow: none;
  transition: background 0.2s ease;
}

html[data-theme] .dl-card:nth-child(2n) {
  border-right: 0;
}

html[data-theme] .dl-card:hover {
  transform: none;
  border-color: var(--hairline);
  box-shadow: none;
  background: var(--surface-2);
}

html[data-theme] .dl-card[data-kind="store"] {
  grid-column: 1 / -1;
  border-right: 0;
  background: var(--surface-2);
}

html[data-theme] .dl-ico {
  width: 38px;
  height: 38px;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: none;
  color: var(--accent);
}

html[data-theme] .dl-title {
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
}

html[data-theme] .dl-sub {
  color: var(--text-2);
  font-size: 13px;
}

html[data-theme] .dl-tag {
  border: 1px solid var(--hairline);
  border-radius: 4px;
  background: none;
  color: var(--text-2);
  font-size: 11px;
}

html[data-theme] .dl-file {
  color: var(--text-3);
  font-size: 12px;
}

html[data-theme] .dl-meta {
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: var(--surface-2);
}

html[data-theme] .dl-meta-row dt {
  color: var(--text-3);
  font-size: 11.5px;
}

html[data-theme] .dl-meta-row dd,
html[data-theme] .dl-meta-row dd code {
  color: var(--text);
}

html[data-theme] .copy-btn {
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-2);
}

html[data-theme] .copy-btn:hover:not([disabled]) {
  border-color: var(--border-strong);
  background: var(--surface-2);
  color: var(--text);
}

html[data-theme] .dl-note {
  color: var(--text-3);
  font-size: 12.5px;
}

/* ---------- 可信 / FAQ：hairline 列表 ---------- */
html[data-theme] .trust-grid {
  gap: 0;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .trust-card {
  padding: 26px 24px;
  border: 0;
  border-bottom: 1px solid var(--hairline);
  border-radius: 0;
  background: none;
  box-shadow: none;
  transition: background 0.2s ease;
}

html[data-theme] .trust-card + .trust-card {
  border-left: 1px solid var(--hairline);
}

html[data-theme] .trust-card:hover {
  transform: none;
  border-color: var(--hairline);
  box-shadow: none;
  background: var(--surface-2);
}

html[data-theme] .trust-ico {
  width: 36px;
  height: 36px;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: none;
  color: var(--accent);
}

html[data-theme] .trust-card h3 {
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
}

html[data-theme] .trust-card p {
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.75;
}

html[data-theme] .trust-card code {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--hairline);
}

html[data-theme] .faq-list {
  counter-reset: faq;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .faq-item {
  counter-increment: faq;
  border: 0;
  border-bottom: 1px solid var(--hairline);
  border-radius: 0;
  background: none;
  box-shadow: none;
}

html[data-theme] .faq-item:hover {
  border-color: var(--hairline);
}

html[data-theme] .faq-item[open] {
  border-color: var(--hairline);
  box-shadow: none;
  background: var(--surface-2);
}

html[data-theme] .faq-item summary {
  padding: 22px 44px 22px 0;
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
}

html[data-theme] .faq-item summary::before {
  content: counter(faq, decimal-leading-zero);
  margin-right: 18px;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
}

html[data-theme] .faq-item[open] summary::before {
  color: var(--accent);
}

html[data-theme] .faq-item summary::after {
  right: 10px;
  color: var(--text-3);
}

html[data-theme] .faq-a {
  padding: 0 40px 24px 50px;
  color: var(--text-2);
  font-size: 13.5px;
  line-height: 1.85;
}

/* ---------- 文章 teaser：白纸 + hairline ---------- */
html[data-theme] .teaser {
  padding: clamp(28px, 4vw, 44px);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: none;
}

html[data-theme] .teaser-main .h2 {
  margin-top: 10px;
}

html[data-theme] .teaser-excerpt {
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.8;
}

html[data-theme] .teaser-stats {
  gap: 8px;
}

html[data-theme] .teaser-stats li {
  padding: 8px 12px;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: none;
}

html[data-theme] .teaser-stats strong,
html[data-theme] .teaser-stats span {
  color: var(--text);
}

html[data-theme] .teaser-stats span {
  color: var(--text-3);
}

html[data-theme] .teaser-aside {
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: var(--surface-2);
}

html[data-theme] .teaser-quote {
  color: var(--text-2);
  font-size: 13.5px;
}

html[data-theme] .teaser-meta {
  color: var(--text-3);
  font-size: 12px;
}

/* ---------- 页脚：浅灰面 + hairline 分栏 ---------- */
html[data-theme] .site-footer {
  padding: clamp(40px, 5vw, 56px) 0 28px;
  background: var(--bg-2);
  border-top: 1px solid var(--hairline);
}

html[data-theme] .footer-grid {
  gap: clamp(24px, 4vw, 56px);
  padding-bottom: 28px;
  border-bottom: 1px solid var(--hairline);
}

html[data-theme] .footer-tagline {
  color: var(--text-2);
  font-size: 12.5px;
}

html[data-theme] .footer-verify {
  color: var(--text-3);
  font-size: 12px;
}

html[data-theme] .footer-links {
  gap: 14px 22px;
}

html[data-theme] .footer-links a {
  color: var(--text-2);
  font-size: 13px;
}

html[data-theme] .footer-links a:hover {
  color: var(--text);
  background: none;
}

html[data-theme] .footer-meta,
html[data-theme] .footer-meta p {
  color: var(--text-3);
  font-size: 12px;
  line-height: 1.8;
}

/* ---------- Lightbox ---------- */
html[data-theme] .lightbox {
  background: rgba(15, 20, 24, 0.58);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

html[data-theme] .lightbox-figure img {
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}

html[data-theme] .lightbox-figure figcaption {
  color: rgba(255, 255, 255, 0.86);
  font-size: 12.5px;
}

html[data-theme] .lightbox-close {
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  box-shadow: none;
}

html[data-theme] .lightbox-close:hover {
  background: var(--surface-2);
  color: var(--text);
}

/* ---------- 移动端 ---------- */
@media (max-width: 1100px) {
  html[data-theme] .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  html[data-theme] .hero-visual {
    max-width: 560px;
  }

  html[data-theme] .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  html[data-theme] .trust-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  html[data-theme] .trust-card:nth-child(2n) {
    border-left: 0;
  }
}

@media (max-width: 900px) {
  html[data-theme] .method-grid {
    grid-template-columns: 1fr;
  }

  html[data-theme] .method-card {
    padding: 22px 0;
  }

  html[data-theme] .method-card + .method-card {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--hairline);
  }

  html[data-theme] .bench-hl + .bench-hl {
    border-left: 0;
    border-top: 1px solid var(--hairline);
  }

  html[data-theme] .bench-highlights {
    grid-template-columns: 1fr;
  }

  html[data-theme] .site-header .nav {
    border-top: 1px solid var(--hairline);
    border-radius: 0;
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  html[data-theme] .site-header.nav-open,
  html[data-theme="dark"] .site-header.nav-open {
    background: var(--header-bg);
    border-bottom: 1px solid var(--hairline);
  }
}

@media (max-width: 720px) {
  html[data-theme] .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  html[data-theme] .stat:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--hairline);
  }

  html[data-theme] .stat:nth-child(4) {
    border-top: 1px solid var(--hairline);
  }

  html[data-theme] .feature-grid {
    grid-template-columns: 1fr;
  }

  html[data-theme] .trust-grid {
    grid-template-columns: 1fr;
  }

  html[data-theme] .trust-card + .trust-card {
    border-left: 0;
  }

  html[data-theme] .hero-title {
    font-size: clamp(44px, 14vw, 64px);
  }

  html[data-theme] .hero-title-cn {
    margin-top: 14px;
    letter-spacing: 0.05em;
  }

  html[data-theme] .hero-lead {
    font-size: 14.5px;
  }

  html[data-theme] .release-actions {
    grid-template-columns: 1fr;
  }

  html[data-theme] .dl-card,
  html[data-theme] .dl-card:nth-child(2n) {
    border-right: 0;
  }

  html[data-theme] .spec-table th,
  html[data-theme] .spec-table td {
    padding: 12px 0;
  }

  html[data-theme] .faq-item summary {
    padding-right: 36px;
  }

  html[data-theme] .faq-a {
    padding: 0 0 22px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html[data-theme] .ui-figure,
  html[data-theme] .feature-card,
  html[data-theme] .stat,
  html[data-theme] .trust-card,
  html[data-theme] .dl-card {
    transition: none;
  }
}

/* ============================================================
   v5 品牌对齐：软件图标（蓝底白字 FH）作为导航/页脚/文章 logo
   ============================================================ */
html[data-theme] .brand-mark {
  width: auto;
  height: auto;
  border-radius: 0;
  background: none;
  box-shadow: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
}

html[data-theme] .brand-mark img {
  display: block;
  width: 36px;
  height: 36px;
  border-radius: 9px;
}

html[data-theme] .footer-brand .brand-mark img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

html[data-theme="dark"] .brand-mark img {
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
}

html[data-theme="dark"] .btn-primary {
  background: #0090e0;
  border-color: #0090e0;
  color: #061a2c;
}

html[data-theme="dark"] .btn-primary:hover {
  background: #4fb3f0;
  border-color: #4fb3f0;
  color: #061a2c;
}

html[data-theme] .article-page .article-chart {
  margin: 24px 0;
}

html[data-theme] .article-page .article-chart img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--hairline);
  border-radius: 10px;
  background: var(--surface);
}

html[data-theme] .article-page .article-chart figcaption {
  margin-top: 10px;
  color: var(--text-3);
  font-size: 12.5px;
  text-align: center;
}

/* 产品介绍文章以清秀排版为主：取消首段大字首字，避免中文首字突兀 */
html[data-theme] .article-page .article-body .article-section:first-of-type > p:first-of-type::first-letter {
  float: none;
  margin: 0;
  font-size: inherit;
  line-height: inherit;
  font-weight: inherit;
  color: inherit;
}

/* ============================================================
   v6 矢量插画 / 克制动效 / 场景与流程内容
   保持图标蓝 + 清秀 hairline；零外部资源。
   ============================================================ */
html[data-theme] .art-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

html[data-theme] .hero {
  overflow: hidden;
}

html[data-theme] .hero > .container {
  position: relative;
  z-index: 1;
}

html[data-theme] .hero-art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
  will-change: transform;
  transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
}

html[data-theme="dark"] .hero-art {
  opacity: 0.55;
}

html[data-theme] .hero-floaters {
  transform-origin: center;
  animation: heroFloat 16s ease-in-out infinite alternate;
}

html[data-theme] .hero-illus {
  position: absolute;
  top: 74px;
  left: -122px;
  right: auto;
  width: min(300px, 44%);
  height: auto;
  z-index: 0;
  opacity: 0.6;
  pointer-events: none;
  animation: illusFloat 9s ease-in-out infinite alternate;
}

html[data-theme="dark"] .hero-illus .illus-card {
  fill: rgba(79, 179, 240, 0.08);
  stroke: #4fb3f0;
}

html[data-theme="dark"] .hero-illus rect[fill="#FFFFFF"] {
  fill: rgba(12, 26, 44, 0.45);
}

html[data-theme="dark"] .hero-illus .draw-fade circle {
  fill: rgba(79, 179, 240, 0.1);
  stroke: #4fb3f0;
}

html[data-theme="dark"] .hero-illus {
  opacity: 0.5;
}

html[data-theme] .hero-visual {
  position: relative;
}

html[data-theme] .hero-visual .release-card {
  position: relative;
  z-index: 1;
}

@keyframes heroFloat {
  from { transform: translate3d(0, -6px, 0) rotate(-0.5deg); }
  to { transform: translate3d(0, 8px, 0) rotate(0.5deg); }
}

@keyframes illusFloat {
  from { transform: translate3d(0, -8px, 0); }
  to { transform: translate3d(0, 10px, 0); }
}

/* ---------- 各 section 小型 motif ---------- */
html[data-theme] .section,
html[data-theme] .hero,
html[data-theme] .site-footer,
html[data-theme] .article-main {
  position: relative;
}

html[data-theme] .section-motif {
  position: absolute;
  top: 30px;
  right: max(24px, calc((100% - var(--container)) / 2 + 8px));
  width: 168px;
  height: 112px;
  z-index: 0;
  pointer-events: none;
  color: var(--accent);
  opacity: 0.16;
}

html[data-theme="dark"] .section-motif {
  color: var(--accent-3);
  opacity: 0.2;
}

html[data-theme] .section > .container {
  position: relative;
  z-index: 1;
}

/* ---------- 算法分类 chips ---------- */
html[data-theme] .algo-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .algo-chips-label {
  margin-right: 6px;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
}

html[data-theme] .algo-chip {
  padding: 5px 11px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

html[data-theme] .algo-chip:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
  transform: translateY(-1px);
}

/* ---------- 适用场景 ---------- */
html[data-theme] .scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .scenario-card {
  padding: 26px 24px 28px;
  border-bottom: 1px solid var(--hairline);
  border-right: 1px solid var(--hairline);
  transition: background 0.25s ease, transform 0.25s ease;
}

html[data-theme] .scenario-card:last-child {
  border-right: 0;
}

html[data-theme] .scenario-card:hover {
  background: var(--surface-2);
  transform: translateY(-2px);
}

html[data-theme] .scenario-ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: 16px;
  border: 1px solid var(--hairline);
  border-radius: 9px;
  color: var(--accent);
  background: var(--surface);
}

html[data-theme] .scenario-ico svg {
  width: 20px;
  height: 20px;
}

html[data-theme] .scenario-card h3 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 15.5px;
  font-weight: 600;
}

html[data-theme] .scenario-card p {
  margin: 0;
  color: var(--text-2);
  font-size: 13.5px;
  line-height: 1.75;
}

/* ---------- 校验流程 ---------- */
html[data-theme] .process-wrap {
  display: grid;
  gap: 26px;
}

html[data-theme] .process-svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 300px;
}

html[data-theme] .process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .process-step {
  display: flex;
  gap: 14px;
  padding: 20px 22px 22px;
  border-right: 1px solid var(--hairline);
}

html[data-theme] .process-step:last-child {
  border-right: 0;
}

html[data-theme] .process-no {
  flex: none;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  line-height: 1.8;
}

html[data-theme] .process-step h3 {
  margin: 0 0 6px;
  color: var(--text);
  font-size: 14.5px;
  font-weight: 600;
}

html[data-theme] .process-step p {
  margin: 0;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- SVG 描边动画（滚动进入时绘制） ---------- */
html[data-theme] .draw-path {
  stroke-dasharray: var(--len, 600);
  stroke-dashoffset: var(--len, 600);
  transition: stroke-dashoffset 1.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}

html[data-theme] .draw-fade {
  opacity: 0;
  transition: opacity 0.9s ease 0.25s;
}

html[data-theme] [data-draw].is-drawn .draw-fade {
  opacity: 1;
}

/* ---------- 卡片 stagger / 微交互 ---------- */
html[data-theme] .feature-card.in,
html[data-theme] .scenario-card.in,
html[data-theme] .process-step.in,
html[data-theme] .trust-card.in {
  transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.2, 0.7, 0.2, 1), background 0.25s ease, border-color 0.25s ease;
}

html[data-theme] .feature-card:nth-child(2),
html[data-theme] .scenario-card:nth-child(2),
html[data-theme] .process-step:nth-child(2),
html[data-theme] .trust-card:nth-child(2) { transition-delay: 60ms; }
html[data-theme] .feature-card:nth-child(3),
html[data-theme] .scenario-card:nth-child(3),
html[data-theme] .process-step:nth-child(3),
html[data-theme] .trust-card:nth-child(3) { transition-delay: 120ms; }
html[data-theme] .feature-card:nth-child(4),
html[data-theme] .scenario-card:nth-child(4),
html[data-theme] .process-step:nth-child(4),
html[data-theme] .trust-card:nth-child(4) { transition-delay: 180ms; }
html[data-theme] .feature-card:nth-child(5),
html[data-theme] .scenario-card:nth-child(5),
html[data-theme] .process-step:nth-child(5) { transition-delay: 240ms; }
html[data-theme] .feature-card:nth-child(6) { transition-delay: 300ms; }

html[data-theme] .scenario-card:hover,
html[data-theme] .process-step:hover {
  border-color: var(--hairline);
}

html[data-theme] .trust-card:hover {
  border-color: var(--accent-line);
}

/* 按钮光带 + 图标位移 */
html[data-theme] .btn-primary {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

html[data-theme] .btn-primary::after {
  content: "";
  position: absolute;
  top: -40%;
  left: -60%;
  width: 36%;
  height: 180%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.26), transparent);
  transform: skewX(-18deg);
  opacity: 0;
  transition: left 0.55s ease, opacity 0.3s ease;
  pointer-events: none;
  z-index: 0;
}

html[data-theme] .btn-primary:hover::after {
  left: 120%;
  opacity: 0.9;
}

html[data-theme] .btn .ico {
  transition: transform 0.22s ease;
}

html[data-theme] .btn:hover .ico {
  transform: translateX(2px);
}

/* 导航下划线过渡 */
html[data-theme] .nav-link {
  transition: color 0.2s ease, border-color 0.2s ease;
}

/* lightbox 过渡 */
html[data-theme] .lightbox.is-open .lightbox-figure {
  animation: lightboxIn 0.28s cubic-bezier(0.2, 0.7, 0.2, 1);
}

@keyframes lightboxIn {
  from { opacity: 0; transform: translateY(10px) scale(0.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* 页脚细线波纹 */
html[data-theme] .site-footer {
  position: relative;
  overflow: hidden;
}

html[data-theme] .footer-wave {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  width: 100%;
  height: 90px;
  pointer-events: none;
  opacity: 0.9;
}

html[data-theme="dark"] .footer-wave g {
  stroke: #4fb3f0;
}

html[data-theme] .site-footer > .container {
  position: relative;
  z-index: 1;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  html[data-theme] .hero-illus {
    left: -18px;
    top: -18px;
    width: 240px;
    opacity: 0.42;
  }

  html[data-theme] .scenario-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  html[data-theme] .scenario-card:nth-child(2n) {
    border-right: 0;
  }

  html[data-theme] .process-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  html[data-theme] .process-step:nth-child(2n) {
    border-right: 0;
  }

  html[data-theme] .process-step:nth-child(-n + 2) {
    border-bottom: 1px solid var(--hairline);
  }

  html[data-theme] .section-motif {
    width: 140px;
    height: 94px;
    opacity: 0.13;
  }
}

@media (max-width: 720px) {
  html[data-theme] .hero-illus {
    display: none;
  }

  html[data-theme] .section-motif {
    display: none;
  }

  html[data-theme] .scenario-grid {
    grid-template-columns: 1fr;
  }

  html[data-theme] .scenario-card {
    border-right: 0;
  }

  html[data-theme] .process-svg {
    max-height: 210px;
  }

  html[data-theme] .process-grid {
    grid-template-columns: 1fr;
  }

  html[data-theme] .process-step {
    border-right: 0;
    border-bottom: 1px solid var(--hairline);
  }

  html[data-theme] .process-step:last-child {
    border-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html[data-theme] .hero-floaters,
  html[data-theme] .hero-illus,
  html[data-theme] .lightbox.is-open .lightbox-figure {
    animation: none !important;
  }

  html[data-theme] .hero-art {
    transform: none !important;
    transition: none;
  }

  html[data-theme] .draw-path,
  html[data-theme] .draw-fade {
    transition: none !important;
  }

  html[data-theme] .draw-fade {
    opacity: 1;
  }

  html[data-theme] .btn-primary::after {
    display: none;
  }
}

/* ============================================================
   v7 内容扩充：算法清单 / 功能明细 / 优势与特色
   ============================================================ */
html[data-theme] .feature-points {
  display: grid;
  gap: 6px;
  margin: 14px 0 0;
  padding: 13px 0 0;
  border-top: 1px solid var(--hairline);
  list-style: none;
}

html[data-theme] .feature-points li {
  position: relative;
  padding-left: 14px;
  color: var(--text-2);
  font-size: 12.5px;
  line-height: 1.6;
}

html[data-theme] .feature-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--accent);
  opacity: 0.55;
  transform: rotate(45deg);
}

/* 功能明细表 */
html[data-theme] .feature-detail {
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .detail-title {
  margin: 0 0 14px;
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
}

html[data-theme] .detail-table {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--hairline);
}

html[data-theme] .detail-table th,
html[data-theme] .detail-table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--hairline);
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
}

html[data-theme] .detail-table th {
  width: 180px;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}

html[data-theme] .detail-table td {
  color: var(--text);
  font-size: 13.5px;
}

html[data-theme] .detail-table tr:hover th,
html[data-theme] .detail-table tr:hover td {
  background: var(--surface-2);
}

/* 算法分组 */
html[data-theme] .algo-groups {
  border-top: 1px solid var(--hairline);
}

html[data-theme] .algo-group {
  padding: 22px 0 4px;
  border-bottom: 1px solid var(--hairline);
}

html[data-theme] .algo-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

html[data-theme] .algo-group-head h3 {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

html[data-theme] .algo-count {
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
}

html[data-theme] .algo-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  column-gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

html[data-theme] .algo-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--hairline);
}

html[data-theme] .algo-name {
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
}

html[data-theme] .algo-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
}

html[data-theme] .algo-dot {
  color: var(--text-3);
  opacity: 0.7;
}

html[data-theme] .algo-tag {
  margin-left: 2px;
  padding: 1px 7px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  color: var(--text-2);
  font-family: var(--font-sans);
  font-size: 10.5px;
  line-height: 1.6;
  white-space: nowrap;
}

html[data-theme] .algo-note {
  margin: 18px 0 0;
  color: var(--text-3);
  font-size: 12.5px;
  line-height: 1.7;
}

/* 优势与特色 */
html[data-theme] .advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--hairline);
}

html[data-theme] .advantage-card {
  padding: 24px 22px 26px;
  border-bottom: 1px solid var(--hairline);
  border-right: 1px solid var(--hairline);
  transition: background 0.25s ease, transform 0.25s ease;
}

html[data-theme] .advantage-card:nth-child(4n) {
  border-right: 0;
}

html[data-theme] .advantage-card:hover {
  background: var(--surface-2);
  transform: translateY(-2px);
}

html[data-theme] .advantage-no {
  display: block;
  margin-bottom: 10px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

html[data-theme] .advantage-card h3 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

html[data-theme] .advantage-card p {
  margin: 0;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.75;
}

@media (max-width: 1100px) {
  html[data-theme] .algo-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  html[data-theme] .advantage-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  html[data-theme] .advantage-card:nth-child(4n) {
    border-right: 1px solid var(--hairline);
  }

  html[data-theme] .advantage-card:nth-child(2n) {
    border-right: 0;
  }
}

@media (max-width: 720px) {
  html[data-theme] .algo-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  html[data-theme] .advantage-grid {
    grid-template-columns: 1fr;
  }

  html[data-theme] .advantage-card,
  html[data-theme] .advantage-card:nth-child(2n),
  html[data-theme] .advantage-card:nth-child(4n) {
    border-right: 0;
  }

  html[data-theme] .detail-table,
  html[data-theme] .detail-table tbody,
  html[data-theme] .detail-table tr,
  html[data-theme] .detail-table th,
  html[data-theme] .detail-table td {
    display: block;
    width: auto;
  }

  html[data-theme] .detail-table th {
    padding-bottom: 4px;
    border-bottom: 0;
  }

  html[data-theme] .detail-table td {
    padding-top: 0;
  }
}

@media (max-width: 480px) {
  html[data-theme] .algo-list {
    grid-template-columns: 1fr;
  }
}

/* ---------- 锚点滚动：sticky 导航不遮挡目标 ---------- */
html[data-theme] main section[id],
html[data-theme] main [id="main"],
html[data-theme] #top,
html[data-theme] #article-main,
html[data-theme] .article-body .article-section[id],
html[data-theme] .toc,
html[data-theme] [id^="s-"] {
  scroll-margin-top: calc(var(--header-h) + 18px);
}