/* ============================================================
   秒说 AI 语音输入法 — voice.byoobai.cn
   按 LOGO/ 设计稿: 极简白底 + 紫色辅助 + 黑色 footer + 斜体强调 + Bento Grid
   ============================================================ */

:root {
  /* 紫色系（取自真实 logo） */
  --primary: #6E59E8;
  --primary-hover: #5747C7;
  --primary-active: #4634A8;
  --primary-light: #ECEAFF;
  --primary-soft: #F4F2FF;
  --primary-deep: #2A1F66;

  /* 黑白系（设计稿主色） */
  --black: #0a0a0a;
  --black-soft: #1a1a1a;
  --gray-900: #171717;
  --gray-800: #262626;
  --gray-700: #404040;
  --gray-600: #525252;
  --gray-500: #737373;
  --gray-400: #a3a3a3;
  --gray-300: #d4d4d4;
  --gray-200: #e5e5e5;
  --gray-100: #f5f5f5;
  --gray-50: #fafafa;
  --white: #ffffff;
  --bg: #fafafa;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #7766FF 0%, #5747C7 100%);
  --gradient-bento-purple: linear-gradient(180deg, #6E59E8 0%, #5747C7 100%);
  --gradient-bento-dark: linear-gradient(180deg, #1a1a1a 0%, #0a0a0a 100%);

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Roboto, sans-serif;
  --font-serif: "Source Han Serif CN", "Songti SC", "STSong", Georgia,
    "Times New Roman", serif;
  --font-mono: "SF Mono", "JetBrains Mono", Consolas, Monaco, monospace;

  /* 字号 */
  --text-xs: 12px;  --text-sm: 13px; --text-base: 14px;
  --text-md: 16px;  --text-lg: 18px; --text-xl: 20px;
  --text-2xl: 24px; --text-3xl: 32px; --text-4xl: 40px;
  --text-5xl: 56px; --text-6xl: 72px;

  /* 间距 */
  --space-1: 4px; --space-2: 8px; --space-3: 12px;
  --space-4: 16px; --space-5: 20px; --space-6: 24px;
  --space-8: 32px; --space-10: 40px; --space-12: 48px;
  --space-16: 64px; --space-20: 80px; --space-24: 96px;
  --space-32: 128px;

  /* 容器 */
  --container-narrow: 768px;
  --container-default: 1200px;
  --container-wide: 1320px;

  /* 圆角 */
  --radius-sm: 6px; --radius-md: 10px; --radius-lg: 16px;
  --radius-xl: 20px; --radius-2xl: 28px; --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
  --shadow-card-hover: 0 12px 32px rgba(0,0,0,0.08);
  --shadow-btn-purple: 0 8px 20px rgba(110, 89, 232, 0.32);

  --header-height: 76px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: 400;
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--white);
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary); }
button { font: inherit; cursor: pointer; border: 0; background: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4 { color: var(--gray-900); font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; }

/* 斜体强调（设计稿核心元素） */
em, .accent-italic, .hero__h1 .accent {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--gray-700);
}

/* ---- Container ---- */
.container {
  max-width: var(--container-default);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container--narrow { max-width: var(--container-narrow); }
.container--wide { max-width: var(--container-wide); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }

.btn-sm { height: 36px; padding: 0 var(--space-4); font-size: var(--text-sm); }
.btn-md { height: 44px; padding: 0 var(--space-6); font-size: var(--text-base); }
.btn-lg { height: 56px; padding: 0 var(--space-8); font-size: var(--text-md); }

.btn-primary {
  background: var(--black);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--gray-800);
  color: var(--white);
  transform: translateY(-1px);
}
.btn.is-downloading {
  box-shadow: 0 0 0 4px rgba(110, 89, 232, 0.16);
}

.btn-secondary {
  background: var(--white);
  color: var(--gray-900);
  border: 1px solid var(--gray-200);
}
.btn-secondary:hover {
  border-color: var(--gray-400);
  color: var(--gray-900);
}

.btn-purple {
  background: var(--primary);
  color: var(--white);
}
.btn-purple:hover {
  background: var(--primary-hover);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn-purple);
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.site-header__inner {
  display: flex;
  align-items: center;
  height: var(--header-height);
  gap: var(--space-10);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--gray-900);
  font-weight: 600;
}
.brand:hover { color: var(--gray-900); }
.brand__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.brand__logo img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}
.brand__name {
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
  white-space: nowrap;
  font-weight: 600;
}

.site-nav { flex: 1; display: flex; justify-content: center; }
.site-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.site-nav a {
  color: var(--gray-700);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-2) 0;
  position: relative;
}
.site-nav a:hover { color: var(--gray-900); }

.site-header__cta { display: inline-flex; gap: var(--space-3); }
.site-header__cta .btn {
  height: 38px;
  padding: 0 var(--space-5);
  font-size: var(--text-sm);
}
.site-header__cta .btn-text {
  background: transparent;
  color: var(--gray-700);
  font-weight: 500;
}
.site-header__cta .btn-text:hover { color: var(--gray-900); }

.site-header__toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
}
.site-header__toggle span {
  width: 20px;
  height: 1.5px;
  background: var(--gray-900);
  border-radius: 2px;
}

@media (max-width: 880px) {
  .site-nav, .site-header__cta { display: none; }
  .site-header__toggle { display: flex; }
}

/* ---- Hero ---- */
.hero {
  padding: var(--space-24) 0 var(--space-20);
  text-align: center;
}
.hero--small { padding: var(--space-16) 0 var(--space-12); }
.hero__inner { max-width: 920px; margin-inline: auto; }
.hero__inner--single { text-align: center; }

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}
.hero__eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-block;
}

.hero__h1 {
  font-size: var(--text-5xl);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-6);
}
.hero__h1 .accent {
  display: inline-block;
  margin: 0 0.1em;
}

.hero__lead {
  font-size: var(--text-lg);
  line-height: 1.65;
  color: var(--gray-600);
  margin: 0 auto var(--space-10);
  max-width: 640px;
}

.hero__ctas {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}
.download-assist {
  max-width: 640px;
  margin: calc(var(--space-3) * -1) auto var(--space-6);
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--gray-500);
}
.hero--demo .download-assist {
  margin-inline: 0;
}
.download-assist__status {
  margin: 0 0 var(--space-2);
  color: var(--primary);
  font-weight: 500;
}
.download-assist__status[hidden] {
  display: none;
}
.download-assist__fallback {
  margin: 0;
}
.download-assist a {
  color: var(--primary);
  font-weight: 600;
}
.hero__tagline {
  font-size: var(--text-sm);
  color: var(--gray-500);
}

/* Hero stats（嵌入 hero） */
.hero__stats {
  display: flex;
  justify-content: center;
  gap: var(--space-12);
  margin-top: var(--space-12);
}
.hero__stat-value {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1;
}
.hero__stat-label {
  font-size: var(--text-sm);
  color: var(--gray-500);
  margin-top: var(--space-2);
}

@media (max-width: 768px) {
  .hero__h1 { font-size: var(--text-4xl); }
  .hero__lead { font-size: var(--text-md); }
  .hero__stats { gap: var(--space-6); flex-wrap: wrap; }
}

/* Hero visual: 隐藏（设计稿不需要 voice-wave 卡） */
.hero__visual { display: none; }

/* ---- Section ---- */
.section {
  padding: var(--space-24) 0;
  background: var(--white);
}
.section--soft { background: var(--gray-50); }

.section__h2 {
  font-size: var(--text-4xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: var(--space-4);
  color: var(--gray-900);
}
.section__h2 em, .section__h2 .italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--gray-500);
}
.section__lead {
  font-size: var(--text-lg);
  color: var(--gray-600);
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-16);
}

/* ---- Grids ---- */
.grid {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-8);
}
.grid--cols-1 { grid-template-columns: 1fr; }
.grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid--cols-5 { grid-template-columns: repeat(5, 1fr); }
.grid--cols-6 { grid-template-columns: repeat(6, 1fr); }
@media (max-width: 1024px) {
  .grid--cols-3, .grid--cols-4, .grid--cols-5, .grid--cols-6 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid--cols-2, .grid--cols-3, .grid--cols-4, .grid--cols-5, .grid--cols-6 { grid-template-columns: 1fr; }
}

/* ---- Cards ---- */
.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.card:hover {
  border-color: var(--gray-300);
  box-shadow: var(--shadow-card);
}
.card__icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-5);
  font-size: 24px;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--gray-900);
  letter-spacing: -0.01em;
}
.card__body {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--gray-600);
}
.card__meta {
  font-size: var(--text-sm);
  color: var(--gray-500);
  margin-bottom: var(--space-3);
}
.card--download .btn { margin-top: var(--space-5); }

/* Plan / 定价卡（保留以防将来用） */
.card--plan { display: flex; flex-direction: column; }
.card--plan-featured {
  border: 2px solid var(--primary);
  background: var(--primary-soft);
}
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--gray-900);
  color: var(--white);
  font-size: var(--text-xs);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

/* ---- Steps（设计稿: 大灰斜体 01/02/03） ---- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  background: var(--white);
  overflow: hidden;
  margin-top: var(--space-12);
  max-width: var(--container-default);
  margin-inline: auto;
}
.step {
  padding: var(--space-12) var(--space-8);
  border-right: 1px solid var(--gray-100);
  background: var(--white);
}
.step:last-child { border-right: 0; }
.step__num {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: var(--text-4xl);
  color: var(--gray-300);
  line-height: 1;
  margin-bottom: var(--space-12);
  letter-spacing: 0.02em;
}
.step__content { display: block; }
.step__title {
  font-size: var(--text-md);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--gray-900);
}
.step__body {
  font-size: var(--text-sm);
  color: var(--gray-500);
  line-height: 1.6;
}
@media (max-width: 1024px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step { border-right: 0; border-bottom: 1px solid var(--gray-100); }
  .step:nth-child(odd) { border-right: 1px solid var(--gray-100); }
}
@media (max-width: 640px) {
  .steps { grid-template-columns: 1fr; }
  .step { border-right: 0; }
  .step:nth-child(odd) { border-right: 0; }
}

/* ---- Stats ---- */
.grid--stats { gap: var(--space-10); margin-top: var(--space-12); }
.stat { text-align: center; }
.stat__value {
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat__label {
  font-size: var(--text-sm);
  color: var(--gray-500);
  margin-top: var(--space-3);
}

/* ---- Comparison Table ---- */
.table-wrap { overflow-x: auto; margin-top: var(--space-10); }
.cmp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.cmp-table th, .cmp-table td {
  padding: var(--space-4) var(--space-5);
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
}
.cmp-table thead th {
  background: var(--gray-50);
  font-weight: 600;
  color: var(--gray-700);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.cmp-table tbody tr:last-child td { border-bottom: 0; }
.cmp-table tbody tr:hover { background: var(--gray-50); }

/* ---- FAQ（设计稿: 极简横线分隔 + 圆形 + 紫色） ---- */
.faq {
  max-width: 820px;
  margin: var(--space-12) auto 0;
  border-top: 1px solid var(--gray-200);
}
.faq__item {
  border-bottom: 1px solid var(--gray-200);
}
.faq__q {
  list-style: none;
  cursor: pointer;
  padding: var(--space-6) 0;
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--gray-900);
  position: relative;
  padding-right: var(--space-12);
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 14px;
  height: 14px;
  margin-top: -7px;
  border-right: 2px solid var(--gray-400);
  border-bottom: 2px solid var(--gray-400);
  transform: rotate(45deg);
  transition: transform 0.2s, border-color 0.2s;
}
.faq__item[open] .faq__q::after {
  transform: rotate(-135deg);
  border-color: var(--primary);
  margin-top: -3px;
}
.faq__a {
  padding: 0 var(--space-12) var(--space-6) 0;
  color: var(--gray-600);
  line-height: 1.8;
  font-size: var(--text-sm);
}

/* ---- CTA Block ---- */
.cta-block {
  text-align: center;
  padding: var(--space-20) var(--space-8);
  background: var(--black);
  color: var(--white);
  border-radius: var(--radius-2xl);
  margin-top: var(--space-16);
}
.cta-block__body {
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  color: rgba(255,255,255,0.8);
  max-width: 560px;
  margin-inline: auto;
}
.cta-block__buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.cta-block .btn-primary {
  background: var(--white);
  color: var(--black);
}
.cta-block .btn-primary:hover { background: var(--gray-100); color: var(--black); }
.cta-block .btn-secondary {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.2);
}
.cta-block .btn-secondary:hover { color: var(--white); border-color: rgba(255,255,255,0.5); }

/* ---- Prose ---- */
.prose { font-size: var(--text-md); line-height: 1.8; color: var(--gray-700); }
.prose h2 { font-size: var(--text-2xl); margin: var(--space-12) 0 var(--space-4); color: var(--gray-900); }
.prose h3 { font-size: var(--text-xl); margin: var(--space-8) 0 var(--space-3); color: var(--gray-900); }
.prose h4 { font-size: var(--text-md); margin: var(--space-6) 0 var(--space-2); font-weight: 600; }
.prose p { margin: 0 0 var(--space-5); }
.prose ul, .prose ol { margin: 0 0 var(--space-5); padding-left: 1.5em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: var(--space-2); }
.prose a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.prose a:hover { color: var(--primary-hover); }
.prose strong { color: var(--gray-900); font-weight: 600; }
.prose em { font-family: var(--font-serif); font-style: italic; color: var(--gray-700); }
.prose blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-5) var(--space-6);
  border-left: 3px solid var(--primary);
  background: var(--primary-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--gray-700);
  font-size: var(--text-md);
}
.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--gray-100);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--primary-active);
}
.prose pre {
  background: var(--black);
  color: var(--gray-100);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.6;
}
.prose pre code { background: transparent; padding: 0; color: inherit; }
.prose img { border-radius: var(--radius-md); margin: var(--space-6) 0; }
.prose hr { border: 0; border-top: 1px solid var(--gray-200); margin: var(--space-10) 0; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
  font-size: var(--text-sm);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.prose th, .prose td { padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--gray-100); text-align: left; }
.prose th { font-weight: 600; color: var(--gray-700); background: var(--gray-50); }

/* ---- Article (blog post) ---- */
.article { padding: var(--space-12) 0 var(--space-24); }
.breadcrumb {
  font-size: var(--text-sm);
  color: var(--gray-500);
  margin-bottom: var(--space-10);
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span[aria-hidden] { margin: 0 var(--space-2); color: var(--gray-300); }
.article__title {
  font-size: var(--text-4xl);
  line-height: 1.2;
  margin-bottom: var(--space-5);
  letter-spacing: -0.02em;
}
.article__meta {
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: var(--gray-500);
  margin-bottom: var(--space-5);
}
.article__lead {
  font-size: var(--text-lg);
  color: var(--gray-600);
  line-height: 1.6;
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--gray-200);
}
.article__related {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--gray-200);
}
.article__related h2 { font-size: var(--text-xl); margin-bottom: var(--space-5); }

/* ---- Post list ---- */
.post-list { display: grid; gap: 0; border-top: 1px solid var(--gray-200); }
.post-list__item { border-bottom: 1px solid var(--gray-200); }
.post-list__link {
  display: block;
  padding: var(--space-8) 0;
  color: inherit;
}
.post-list__link:hover .post-list__title { color: var(--primary); }
.post-list__title {
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
  transition: color 0.2s;
}
.post-list__summary { color: var(--gray-600); margin-bottom: var(--space-2); line-height: 1.7; }
.post-list__date { font-size: var(--text-sm); color: var(--gray-400); }

/* ---- Related list ---- */
.related-list {
  margin: var(--space-5) 0 0;
  display: grid;
  gap: 0;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--gray-200);
}
.related-list li {
  border-bottom: 1px solid var(--gray-200);
}
.related-list a {
  display: block;
  padding: var(--space-4) 0;
  color: var(--gray-700);
  font-weight: 500;
  font-size: var(--text-sm);
  position: relative;
  padding-right: var(--space-8);
}
.related-list a::after {
  content: "→";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  transition: transform 0.2s, color 0.2s;
}
.related-list a:hover { color: var(--primary); }
.related-list a:hover::after { color: var(--primary); transform: translateY(-50%) translateX(4px); }

/* ---- Footer（设计稿: 黑色） ---- */
.site-footer {
  background: var(--black);
  color: var(--gray-400);
  padding: var(--space-20) 0 var(--space-8);
  margin-top: var(--space-24);
}
.site-footer .brand { color: var(--white); }
.site-footer .brand:hover { color: var(--white); }
.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: var(--space-16);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-footer__brand { max-width: 360px; }
.site-footer__tagline {
  color: var(--gray-400);
  font-size: var(--text-sm);
  margin: var(--space-5) 0 var(--space-3);
  line-height: 1.7;
}
.site-footer__contact { font-size: var(--text-sm); color: var(--gray-500); }
.site-footer__contact a { color: var(--gray-400); }
.site-footer__contact a:hover { color: var(--white); }
.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}
.site-footer__col h4 {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--gray-300);
  margin-bottom: var(--space-5);
}
.site-footer__col ul { display: grid; gap: var(--space-3); }
.site-footer__col a { color: var(--gray-500); font-size: var(--text-sm); }
.site-footer__col a:hover { color: var(--white); }
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-8);
  font-size: var(--text-xs);
  color: var(--gray-600);
}
.site-footer__bottom a { color: var(--gray-600); }
.site-footer__bottom a:hover { color: var(--gray-400); }
@media (max-width: 768px) {
  .site-footer__top { grid-template-columns: 1fr; gap: var(--space-10); }
  .site-footer__cols { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
}

/* ---- Misc ---- */
.empty { text-align: center; color: var(--gray-400); padding: var(--space-20) 0; }
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* 隐藏旧 voice-wave 动画（设计稿不需要） */
.voice-wave, .hero-card { display: none; }

/* ============================================================
   v2 高转化电商详情页扩展 — 12 个新 section kind + 全局动效
   ============================================================ */

/* ---- 21. 滚动触发动画基础 ---- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-scale {
  opacity: 0;
  transform: scale(1.05);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* ---- 22. 输入法演示组件 voice-demo（核心动效） ---- */
.voice-demo {
  width: 100%;
  max-width: 540px;
  margin-inline: auto;
  perspective: 1200px;
}
.voice-demo__window {
  background: #fff;
  border-radius: 14px;
  box-shadow:
    0 1px 1px rgba(0,0,0,0.05),
    0 8px 24px rgba(0,0,0,0.08),
    0 24px 64px rgba(110, 89, 232, 0.12);
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.06);
  transform: rotateX(2deg) rotateY(-3deg);
  transition: transform 0.4s ease;
}
.voice-demo:hover .voice-demo__window {
  transform: rotateX(0) rotateY(0);
}
.voice-demo__titlebar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: #f5f5f7;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  font-size: 12px;
  color: #888;
}
.voice-demo__titlebar .dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  display: inline-block;
}
.voice-demo__titlebar .dot--red { background: #ff5f57; }
.voice-demo__titlebar .dot--yellow { background: #febc2e; }
.voice-demo__titlebar .dot--green { background: #28c840; }
.voice-demo__app {
  margin-left: 8px;
  font-weight: 500;
}
.voice-demo__body {
  position: relative;
  padding: 28px 32px 36px;
  min-height: 220px;
  font-family: -apple-system, "PingFang SC", sans-serif;
  font-size: 15px;
  line-height: 1.9;
  color: var(--gray-800);
}
.voice-demo__doc {
  min-height: 160px;
}
.voice-demo__doc-title {
  font-weight: 600;
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.voice-demo__output {
  margin: 0;
}
.voice-demo__output .char {
  opacity: 0;
  display: inline-block;
  animation: char-appear 8s infinite;
}
.voice-demo__output .char:nth-child(1)  { animation-delay: 2.5s; }
.voice-demo__output .char:nth-child(2)  { animation-delay: 2.6s; }
.voice-demo__output .char:nth-child(3)  { animation-delay: 2.7s; }
.voice-demo__output .char:nth-child(4)  { animation-delay: 2.8s; }
.voice-demo__output .char:nth-child(5)  { animation-delay: 2.9s; }
.voice-demo__output .char:nth-child(6)  { animation-delay: 3.0s; }
.voice-demo__output .char:nth-child(7)  { animation-delay: 3.1s; }
.voice-demo__output .char:nth-child(8)  { animation-delay: 3.2s; }
.voice-demo__output .char:nth-child(9)  { animation-delay: 3.3s; }
.voice-demo__output .char:nth-child(10) { animation-delay: 3.4s; }
.voice-demo__output .char:nth-child(11) { animation-delay: 3.5s; }
.voice-demo__output .char:nth-child(12) { animation-delay: 3.6s; }
.voice-demo__output .char:nth-child(13) { animation-delay: 3.7s; }
.voice-demo__output .char:nth-child(14) { animation-delay: 3.8s; }
.voice-demo__output .char:nth-child(15) { animation-delay: 3.9s; }
.voice-demo__output .char:nth-child(16) { animation-delay: 4.0s; }
.voice-demo__output .char:nth-child(17) { animation-delay: 4.1s; }
.voice-demo__output .char:nth-child(18) { animation-delay: 4.2s; }
.voice-demo__output .char:nth-child(19) { animation-delay: 4.3s; }
.voice-demo__output .char:nth-child(20) { animation-delay: 4.4s; }
.voice-demo__output .char:nth-child(21) { animation-delay: 4.5s; }
.voice-demo__output .char:nth-child(22) { animation-delay: 4.6s; }
.voice-demo__output .char:nth-child(23) { animation-delay: 4.7s; }
.voice-demo__output .char:nth-child(24) { animation-delay: 4.8s; }
.voice-demo__output .char:nth-child(25) { animation-delay: 4.9s; }
.voice-demo__output .char:nth-child(26) { animation-delay: 5.0s; }
.voice-demo__output .char:nth-child(27) { animation-delay: 5.1s; }
.voice-demo__output .char:nth-child(28) { animation-delay: 5.2s; }
.voice-demo__output .char:nth-child(29) { animation-delay: 5.3s; }
.voice-demo__output .char:nth-child(30) { animation-delay: 5.4s; }

@keyframes char-appear {
  0%   { opacity: 0; transform: translateY(8px); }
  4%   { opacity: 1; transform: translateY(0); }
  85%  { opacity: 1; transform: translateY(0); }
  95%  { opacity: 0; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(8px); }
}

.voice-demo__cursor {
  display: inline-block;
  width: 2px;
  height: 18px;
  background: var(--primary);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: cursor-blink 1s infinite;
}
@keyframes cursor-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.voice-demo__keypress {
  position: absolute;
  bottom: -32px;
  right: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: none;
}
.voice-demo__key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px; height: 60px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 18px;
  color: var(--gray-700);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  animation: key-press 8s infinite;
}
@keyframes key-press {
  0%, 5%   { background: #fff; color: var(--gray-700); transform: translateY(0); box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
  8%       { background: var(--primary); color: #fff; transform: translateY(2px); box-shadow: 0 0 16px rgba(110,89,232,0.5); }
  30%      { background: var(--primary); color: #fff; transform: translateY(2px); box-shadow: 0 0 16px rgba(110,89,232,0.5); }
  35%, 100% { background: #fff; color: var(--gray-700); transform: translateY(0); box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
}

.voice-demo__wave {
  display: flex;
  gap: 3px;
  align-items: center;
  height: 32px;
  opacity: 0;
  animation: wave-show 8s infinite;
}
@keyframes wave-show {
  0%, 7%   { opacity: 0; }
  10%      { opacity: 1; }
  28%      { opacity: 1; }
  32%, 100% { opacity: 0; }
}
.voice-demo__wave span {
  width: 4px;
  background: linear-gradient(to top, var(--primary), #9B85FF);
  border-radius: 2px;
  animation: wave-beat 0.6s ease-in-out infinite;
}
.voice-demo__wave span:nth-child(1) { height: 12px; animation-delay: 0s; }
.voice-demo__wave span:nth-child(2) { height: 24px; animation-delay: 0.1s; }
.voice-demo__wave span:nth-child(3) { height: 18px; animation-delay: 0.2s; }
.voice-demo__wave span:nth-child(4) { height: 28px; animation-delay: 0.3s; }
.voice-demo__wave span:nth-child(5) { height: 14px; animation-delay: 0.4s; }
@keyframes wave-beat {
  0%, 100% { transform: scaleY(0.4); }
  50% { transform: scaleY(1); }
}

.voice-demo__bubble {
  position: absolute;
  bottom: 56px;
  right: 110px;
  background: var(--gray-900);
  color: #fff;
  padding: 10px 16px;
  border-radius: 14px;
  font-size: 13px;
  white-space: nowrap;
  opacity: 0;
  animation: bubble-show 8s infinite;
}
.voice-demo__bubble::after {
  content: "";
  position: absolute;
  bottom: -6px;
  right: 24px;
  width: 0; height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid var(--gray-900);
}
@keyframes bubble-show {
  0%, 12% { opacity: 0; transform: translateY(8px); }
  18%     { opacity: 1; transform: translateY(0); }
  35%     { opacity: 1; transform: translateY(0); }
  40%, 100% { opacity: 0; transform: translateY(0); }
}

/* ---- 23. hero_demo（左文右动效） ---- */
.hero--demo .hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  text-align: left;
  max-width: var(--container-default);
}
.hero--demo .hero__h1 { margin-inline: 0; }
.hero--demo .hero__lead { margin-inline: 0; max-width: 100%; }
.hero--demo .hero__ctas { justify-content: flex-start; }
@media (max-width: 1024px) {
  .hero--demo .hero__inner { grid-template-columns: 1fr; gap: var(--space-12); text-align: center; }
  .hero--demo .hero__ctas { justify-content: center; }
  .hero--demo .download-assist { margin-inline: auto; }
}

/* ---- 24. pain_grid 痛点放大 ---- */
.section--pain_grid {
  padding: var(--space-24) 0;
  background: var(--gray-50);
}
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
}
@media (max-width: 1024px) { .pain-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .pain-grid { grid-template-columns: 1fr; } }

.pain-card {
  background: #fff;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: transform 0.3s, box-shadow 0.3s;
}
.pain-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}
.pain-card__img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--gray-100);
  display: block;
  filter: grayscale(0.1);
  transition: filter 0.4s, transform 0.4s;
}
.pain-card:hover .pain-card__img {
  filter: grayscale(0);
  transform: scale(1.04);
}
.pain-card__body {
  padding: var(--space-6);
}
.pain-card__quote {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--gray-900);
  line-height: 1.5;
  margin-bottom: var(--space-2);
}
.pain-card__meta {
  font-size: var(--text-sm);
  color: var(--gray-500);
}

/* ---- 25. promise 一句话承诺 ---- */
.section--promise {
  padding: var(--space-32) 0;
  background: #fff;
  text-align: center;
}
.promise__h1 {
  font-size: clamp(56px, 9vw, 96px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-8);
  color: var(--gray-900);
}
.promise__h1 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  background: linear-gradient(135deg, var(--primary), #9B85FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.promise__sub {
  font-size: var(--text-xl);
  color: var(--gray-600);
  max-width: 680px;
  margin: 0 auto;
}

/* ---- 26. live_demo 满屏产品演示 ---- */
.section--live_demo {
  padding: var(--space-24) 0;
  background: linear-gradient(180deg, #fff 0%, var(--primary-soft) 100%);
}
.live-demo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  margin-top: var(--space-12);
}
@media (max-width: 1024px) { .live-demo { grid-template-columns: 1fr; } }
.live-demo__scene img {
  width: 100%;
  border-radius: var(--radius-2xl);
  aspect-ratio: 4 / 3;
  object-fit: cover;
  box-shadow: 0 24px 64px rgba(0,0,0,0.12);
}
.live-demo__scene-caption {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--gray-500);
  text-align: center;
}

/* ---- 27. bento Grid（不规则） ---- */
.section--bento {
  padding: var(--space-24) 0;
  background: #fff;
}
.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-auto-rows: 220px;
  gap: var(--space-5);
  margin-top: var(--space-12);
}
.bento-card {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--gray-300);
}
.bento-card--span-2 { grid-column: span 2; }
.bento-card--span-3 { grid-column: span 3; }
.bento-card--span-4 { grid-column: span 4; }
.bento-card--row-2 { grid-row: span 2; }
.bento-card--dark { background: var(--gray-900); color: var(--white); border-color: transparent; }
.bento-card--dark .bento-card__title { color: var(--white); }
.bento-card--dark .bento-card__body { color: rgba(255,255,255,0.7); }
.bento-card--purple {
  background: var(--gradient-bento-purple);
  color: #fff;
  border-color: transparent;
}
.bento-card--purple .bento-card__title { color: #fff; }
.bento-card--purple .bento-card__body { color: rgba(255,255,255,0.85); }
.bento-card__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: var(--space-3);
}
.bento-card--dark .bento-card__eyebrow,
.bento-card--purple .bento-card__eyebrow { color: rgba(255,255,255,0.6); }
.bento-card__big {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary), #9B85FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.bento-card--purple .bento-card__big,
.bento-card--dark .bento-card__big {
  background: none;
  -webkit-text-fill-color: #fff;
  color: #fff;
}
.bento-card__title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--gray-900);
}
.bento-card__body {
  font-size: var(--text-sm);
  color: var(--gray-600);
  line-height: 1.6;
}
.bento-card__img {
  position: absolute;
  right: -20px; bottom: -20px;
  width: 60%;
  max-width: 280px;
  opacity: 0.16;
  transition: opacity 0.3s;
}
.bento-card:hover .bento-card__img { opacity: 0.3; }

@media (max-width: 1024px) {
  .bento { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 180px; }
  .bento-card--span-2, .bento-card--span-3, .bento-card--span-4 { grid-column: span 2; }
}
@media (max-width: 640px) {
  .bento { grid-template-columns: 1fr; }
  .bento-card--span-2, .bento-card--span-3, .bento-card--span-4 { grid-column: span 1; }
}

/* ---- 28. scenario_block 单场景大块 ---- */
.section--scenario_block {
  padding: var(--space-24) 0;
}
.scenario-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}
.scenario-block--reverse { direction: rtl; }
.scenario-block--reverse > * { direction: ltr; }
@media (max-width: 1024px) {
  .scenario-block { grid-template-columns: 1fr; gap: var(--space-10); }
  .scenario-block--reverse { direction: ltr; }
}
.scenario-block__media img {
  width: 100%;
  border-radius: var(--radius-2xl);
  aspect-ratio: 4 / 3;
  object-fit: cover;
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}
.scenario-block__content { padding: var(--space-4); }
.scenario-block__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--space-4);
}
.scenario-block__h3 {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--gray-900);
}
.scenario-block__pain {
  font-size: var(--text-lg);
  color: var(--gray-700);
  font-style: italic;
  font-family: var(--font-serif);
  border-left: 3px solid var(--primary);
  padding-left: var(--space-4);
  margin-bottom: var(--space-6);
}
.scenario-block__steps {
  list-style: none;
  margin: 0 0 var(--space-6);
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.scenario-block__steps li {
  font-size: var(--text-base);
  color: var(--gray-700);
  padding-left: 28px;
  position: relative;
}
.scenario-block__steps li::before {
  content: "→";
  position: absolute;
  left: 0; top: 0;
  color: var(--primary);
  font-weight: 700;
}
.scenario-block__data {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--primary-soft);
  color: var(--primary);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
}

/* ---- 29. testimonial_wall 用户证言墙 ---- */
.section--testimonial_wall {
  padding: var(--space-24) 0;
  background: var(--gray-50);
  overflow: hidden;
}
.testimonial-wall {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-12);
}
@media (max-width: 1024px) { .testimonial-wall { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .testimonial-wall { grid-template-columns: 1fr; } }
.testimonial {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  border: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: transform 0.3s, box-shadow 0.3s;
}
.testimonial:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.testimonial__head {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}
.testimonial__avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--gray-200);
}
.testimonial__name {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--gray-900);
}
.testimonial__role {
  font-size: var(--text-sm);
  color: var(--gray-500);
}
.testimonial__quote {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--gray-700);
}
.testimonial__quote::before { content: "「"; color: var(--gray-300); }
.testimonial__quote::after  { content: "」"; color: var(--gray-300); }
.testimonial__data {
  font-size: var(--text-sm);
  color: var(--primary);
  font-weight: 600;
  padding-top: var(--space-3);
  border-top: 1px solid var(--gray-100);
}

/* ---- 30. big_stats 满屏大数字 ---- */
.section--big_stats {
  padding: var(--space-24) 0;
  background: var(--gray-900);
  color: #fff;
}
.section--big_stats .section__h2 { color: #fff; }
.section--big_stats .section__lead { color: rgba(255,255,255,0.7); }
.big-stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-10);
  margin-top: var(--space-12);
}
@media (max-width: 1024px) { .big-stats { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .big-stats { grid-template-columns: 1fr; } }
.big-stat__value {
  font-size: clamp(48px, 6vw, 88px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  background: linear-gradient(135deg, #fff, #C7BFFF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.big-stat__label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  margin-top: var(--space-3);
  letter-spacing: 0.05em;
}

/* ---- 31. compare_visual 视觉对比表 ---- */
.section--compare_visual {
  padding: var(--space-24) 0;
}
.compare-table {
  width: 100%;
  margin-top: var(--space-12);
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  background: #fff;
}
.compare-table th, .compare-table td {
  padding: var(--space-5) var(--space-5);
  text-align: center;
  border-bottom: 1px solid var(--gray-100);
}
.compare-table thead th {
  background: var(--gray-50);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--gray-700);
}
.compare-table tbody td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--gray-700);
  background: var(--gray-50);
}
.compare-table .col-us {
  background: var(--primary-soft);
  font-weight: 600;
  color: var(--primary-active);
}
.compare-table thead .col-us {
  background: var(--gradient-primary);
  color: #fff;
}
.compare-table tbody tr:last-child td { border-bottom: 0; }
.compare-table .yes { color: var(--primary); font-weight: 700; }
.compare-table .no { color: var(--gray-400); }
.compare-table .partial { color: #F59E0B; }

/* ---- 32. trust_logos logo 墙 ---- */
.section--trust_logos {
  padding: var(--space-20) 0;
  background: #fff;
}
.trust-eyebrow {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--gray-500);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-8);
}
.trust-logos {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: var(--space-8);
  align-items: center;
  justify-items: center;
  max-width: var(--container-default);
  margin-inline: auto;
}
.trust-logos__item {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--gray-400);
  filter: grayscale(1);
  opacity: 0.7;
  transition: filter 0.3s, opacity 0.3s, color 0.3s;
}
.trust-logos__item:hover {
  filter: grayscale(0);
  opacity: 1;
  color: var(--gray-900);
}
@media (max-width: 1024px) { .trust-logos { grid-template-columns: repeat(4, 1fr); gap: var(--space-6); } }
@media (max-width: 640px)  { .trust-logos { grid-template-columns: repeat(3, 1fr); gap: var(--space-4); } }

/* ---- 33. cta_dark 黑底终极 CTA ---- */
.section--cta_dark {
  padding: var(--space-24) 0;
  background: var(--gray-900);
  color: #fff;
  text-align: center;
}
.cta-dark__h2 {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
  color: #fff;
}
.cta-dark__h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  background: linear-gradient(135deg, #fff, #C7BFFF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cta-dark__lead {
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.7);
  max-width: 580px;
  margin: 0 auto var(--space-10);
}
.cta-dark__buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}
.cta-dark .btn-primary { background: #fff; color: var(--gray-900); }
.cta-dark .btn-primary:hover { background: var(--gray-100); color: var(--gray-900); }
.cta-dark .btn-secondary { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.25); }
.cta-dark .btn-secondary:hover { color: #fff; border-color: rgba(255,255,255,0.5); }
.cta-dark .voice-demo__window { background: #1f1f24; color: #fff; }
.cta-dark .voice-demo__titlebar { background: #2a2a30; color: #aaa; border-color: rgba(255,255,255,0.06); }
.cta-dark .voice-demo__body { color: rgba(255,255,255,0.9); }
.cta-dark .voice-demo__doc-title { color: rgba(255,255,255,0.4); }

/* ---- 34. 终极 CTA 嵌 demo ---- */
.cta-dark__demo {
  max-width: 540px;
  margin: 0 auto;
}

/* ---- 35. 博客文章目录侧边栏（TOC） ---- */
.article--with-toc { padding: var(--space-12) 0 var(--space-24); }
.article__layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-16);
  margin-top: var(--space-8);
}
.article__toc { position: relative; }
.article__toc-inner {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  max-height: calc(100vh - var(--header-height) - 48px);
  overflow-y: auto;
  font-size: var(--text-sm);
  padding-right: 8px;
}
.article__toc-inner::-webkit-scrollbar { width: 4px; }
.article__toc-inner::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 2px; }
.article__toc-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--gray-500);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}
.article__toc-nav { display: flex; flex-direction: column; }
.article__toc-nav a {
  display: block;
  padding: 7px 0 7px 14px;
  color: var(--gray-500);
  border-left: 2px solid var(--gray-200);
  line-height: 1.5;
  transition: color 0.2s, border-color 0.2s, padding-left 0.2s;
  font-size: var(--text-sm);
}
.article__toc-nav a:hover {
  color: var(--gray-900);
  border-color: var(--gray-400);
  padding-left: 16px;
}
.article__toc-nav a.is-active {
  color: var(--primary);
  border-color: var(--primary);
  font-weight: 600;
}
.article__toc-nav a.toc-h3 {
  padding-left: 26px;
  font-size: var(--text-xs);
  color: var(--gray-400);
}
.article__toc-nav a.toc-h3.is-active { padding-left: 28px; }
.article__toc-nav a.toc-h3:hover { padding-left: 28px; }

/* 文章 H2/H3 锚点定位偏移（避免被 sticky header 遮挡） */
.article__body h2, .article__body h3 {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

@media (max-width: 1024px) {
  .article__layout { grid-template-columns: 1fr; gap: var(--space-8); }
  .article__toc { display: none; }
}